The present invention provides: metal oxide particles which have a narrow particle size distribution, are spherical, and undergo little cracking; and a method for producing same. The present invention provides metal oxide particles characterized in that the ratio (Sa/Sb) of the specific surface area Sa (m2/g) of the metal oxide particles, as measured using the BET method, and the specific surface area Sb (m2/g) of the metal oxide particles, as calculated from the SEM short axis d1 (μm) and the true density ρa (g/cm3/g)) is 1.0-2.0.
A colloidal silica comprising water and silica particles, wherein the average particle size of the silica particles is 60 to 130 nm, and the content of coarse silica particles with a particle size of 0.2 μm or more among the silica particles is 10,000,000 particles/mL or less at a silica particle concentration of 1 mass.
A colloidal silica comprising water and silica particles, wherein the specific relaxation rate, as measured by pulsed NMR at a silica particle concentration of 3 mass %, is 0.60 or more, and the zeta potential of the surface of the silica particles in the pH range of 2 to 5 is −10 to 10 mV.
The present invention provides a colloidal silica in which the average secondary particle diameter of silica particles is small, and the dispersion stability of silica particles can be maintained over a long period even under strongly acidic conditions of pH 3. The present invention also provides a method for producing the colloidal silica. The present invention provides a colloidal silica containing silica particles, wherein the colloidal silica is characterized in that: the silica particles have an average secondary particle diameter of 20 nm or less as measured by a dynamic light scattering; the zeta potential measured under conditions of pH 3 is -20 mV or less; and the surface of the silica particles is modified with a sulfonic acid group.
The present invention provides a colloidal silica in which the average secondary particle diameter of silica particles is small, and the dispersion stability of silica particles can be maintained over a long period even under strongly acidic conditions of pH 3. The present invention also provides a method for producing the colloidal silica. The present invention provides a colloidal silica containing silica particles, wherein the colloidal silica is characterized in that: the silica particles have an average secondary particle diameter of 20 nm or less as measured by a dynamic light scattering; the zeta potential measured under conditions of pH 3 is -20 mV or less; and the surface of the silica particles is modified with a sulfonic acid group.
Provided is an agricultural composition with which the supply of a biostimulant to a plant can be controlled in accordance with a situation of high-temperature stress or low-temperature stress. This agricultural composition is characterized by being composed of a temperature-responsive base material that initiates melting or decomposition at a prescribed temperature, and by containing a biostimulant that alleviates non-biological stress of the plant or promotes growth of the plant.
A01N 35/06 - Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical containing keto or thioketo groups as part of a ring, e.g. cyclohexanone, quinoneDerivatives thereof, e.g. ketals
The present invention provides a method for producing hollow silica particles, the method such that the steps are simple and the average particle diameter and the size of a hollow section can be controlled. The present invention provides a method for producing hollow silica particles, the method being characterized by comprising: (1) a step 1 in which (i) particles of at least one type selected from the group consisting of metal particles and metal oxide fine particles, (ii) an alkoxysilane, or an alkoxysilane and a metal alkoxide, and (iii) a basic catalyst A, are added to a solvent and stirred to prepare a solution, and as a result, core-shell particles each comprising the metal particle as the core and a shell that covers the metal particles are formed in the solution; and (2) a step 2 in which a metal complex is formed with the particles, and a basic catalyst B and the particles are dissolved.
The present invention provides colloidal silica containing silica particles excellent in compactness and excellent in maintenance of the bumpy surface under basic conditions, and provides a method for producing the colloidal silica. The present invention provides colloidal silica containing silica particles having a bumpy surface, wherein (1) the silica particles have a content of alkoxy groups of 1000 ppm or more, and (2) the silica particles have a reduction in specific surface area of 15.0% or less when the silica particles are heated under basic conditions.
Provided are a highly versatile agricultural resin film and various agricultural molded products with which compounding agents for achieving expected effects in agriculture can be supplied through biodegradation, and there is no need for replacement for each expected effect. A resin film characterized by comprising a resin base material that contains at least a biodegradable resin, and containing a biostimulant that alleviates environmental stress on plants or promotes plant growth. A resin molded product comprising a resin base material that contains at least a biodegradable resin, the resin molded product being characterized by containing a biostimulant that alleviates abiotic stress on plants or promotes plant growth, and the molded product being a planter, a string, a clip, a Jiffy pot, a cell tray, a support prop, a net, or a nonwoven fabric.
Provided are a methane suppressant which is safe and steady supply of which is guaranteed; and a methane suppressant which is more efficacious in the effect of reducing methane generation than fumaric acid and malic acid. The methane suppressant, which is for suppressing methane generated from ruminant digestive organs, comprises as an active ingredient at least one organic acid selected from the group consisting of maleic anhydride, itaconic acid and citric acid.
The present invention provides a method for producing silica particles without using a citric acid, and provides silica particles with excellent true density and dispersibility. The silica particles have (1) a true density of 0.8 g/cm3-1.4 g/cm3, (2) a frequency, of particles larger than twice the average particle diameter in a particle size distribution, of at most 15%, and (3) a water absorption amount of at most 1.0 mass%.
The present invention provides a resin film which has high light transmittance and/or high rate of light utilization for use for plants in comparison to conventional resin films, and which is capable of accelerating the growth of agricultural crops. This resin film is characterized by containing ceramic fine particles (A), and is also characterized in that: ceramic nanoparticles (B) that have a particle diameter of 1 nm to 100 nm and/or ceramic microparticles (C) that have a particle diameter of 1 nm to 100 nm are contained as the ceramic fine particles (A); and the total content of the ceramic nanoparticles (B) and the ceramic microparticles (C) is 95% by mass to 100% by mass relative to the total mass of the ceramic fine particles (A).
By increasing the amount of alkoxysilane (for example, the total amount of tetramethyl orthosilicate and alkoxysilane having amino groups) added during the reaction to form a shell on a core particle by at least 200 times, in molar ratio, to an amount of alkaline catalyst present in a shell-forming reaction solution, the present invention provides a colloidal silica which comprises core-shell type silica particles with a silanol group density of at most 4.0 ea/nm2, has a low content of fine particles, and in which a silyl group having an amino group inside the particles is introduced therein.
Colloidal silica containing water and silica particles, said colloidal silica being characterized in that the relative relaxation rate as measured by pulsed NMR at a silica particle concentration of 3 mass% is 0.60 or greater, and the zeta potential of the silica particle surfaces in the pH range of 2 to 5 is -10 to 10 mv.
Colloidal silica containing water and silica particles, said colloidal silica being characterized in that the average particle size of the silica particles is 60-130 nm, and the amount of bulky silica particles having a particle size of 0.2 µm or larger among the silica particles is at most 10,000,000 particles/mL when the silica particle concentration is 1 mass%.
Disclosed is an acetic-acid-containing powder in which acetic acid or a liquid containing acetic acid has been adsorbed onto a base material, wherein the base material contains at least one substance selected from the group consisting of malates, gluconates, tartrates, and lactates. The acetic-acid-containing powder has an excellent taste and can be manufactured easily.
The problem to be solved by the present invention is to provide colloidal silica for metal polishing that is capable of achieving a high polishing rate. This problem can be achieved by a colloidal silica for metal polishing, comprising a silica particle having a surface on which a functional group having at least one carboxyl group is immobilized by covalent bonding.
The present invention provides colloidal silica that exhibits excellent abrasiveness and contains, with high purity, deformed silica particles with excellent compactness and a large amount of alkoxy groups per unit area; the invention also provides a method for producing the colloidal silica in a simple manner with reduced costs. The invention provides colloidal silica containing silica particles having a bent structure and/or a branched structure, wherein the silica particles have a particle density of 1.95 or more, the silica particles have a ratio (m/n) of the content of alkoxy groups m (ppa) to the average primary particle size n (nm) of 200 or more, and the silica particles having a bent structure and/or a branched structure are present in an amount of 15% or more based on the number of particles in a given field of view as observed with a scanning electron microscope at 200,000-times magnification.
A colloidal silica is disclosed that contains, with high purity, silica particles having an appropriate particle density, a high aggregation ratio, and a high alkoxy group content, and to provide a method for producing the colloidal silica in a simple manner at reduced costs. The colloidal silica containing silica particles is disclosed, wherein the silica particles have an average primary particle size of 33 nm or more, an aggregation ratio of 1.2 or more, and a particle density of 1.95 or more, the silica particles contain 1000 ppm by mass or more of alkoxy groups per gram of the silica particles, the proportion of the number of silica particles having an equivalent circle diameter under 20 nm is less than 15%, and the silica particles contain a primary amine in an amount of 5 μmol or more per gram of the silica particles.
The present invention provides colloidal silica containing silica particles excellent in compactness and excellent in maintenance of the bumpy surface under basic conditions, and provides a method for producing the colloidal silica. The present invention provides colloidal silica containing silica particles having a bumpy surface, wherein (1) the silica particles have a content of alkoxy groups of 1000 ppm or more, and (2) the silica particles have a reduction in specific surface area of 15.0% or less when the silica particles are heated under basic conditions.
The present invention provides a hydrophobic silica powder having a small particle size, a narrow particle size distribution, and a high hydrophobicity, and containing a very small amount of organic acid, and toner resin particles having the hydrophobic silica powder on the surface thereof. A hydrophobic silica powder having a particle size (D50) as measured by a laser diffraction method of 300 nm or less, a particle size distribution index (D90/D10) of 3.0 or less, a hydrophobicity of 60% by volume or more, and an organic acid content of 1 to 300 ppm.
Colloidal silica containing silica particles that have a small particle size (e.g., an average primary particle size of 20 nm or less) and that contain alkoxy groups, and a method for producing the colloidal silica, are disclosed. The colloidal silica containing silica particles can have a small particle size and exhibit a suppressed increase in the average secondary particle size after storage. The colloidal silica containing silica particles wherein the silica particles have an average primary particle size of 20 nm or less, the silica particles have a ratio (m/n) of the content of alkoxy groups m (ppm) to the average primary particle size n (nm) of 300 or more, the silica particles have a particle density of 1.95 or more, and the silica particles have an increase rate of average secondary particle size of 12% or less in a storage stability test.
An object of the present invention is to provide a metal oxide particle having a surface modified with a quaternary ammonium group, and a method for producing the particle. The present invention relates to a metal oxide particle having a surface modified with a silyl group and having an aggregation ratio (average particle size measured by dynamic light scattering/average diameter of primary particles measured in an SEM image) of 5.0 or less, the silyl group being at least one group selected from the group consisting of a silyl group represented by general formula (1): —Si(X)n-[L-CR1(OH)—C(R2)2-A]3-n (1), wherein X is the same or different, and each represents a hydroxy group or the like; n is 0, 1, or 2; L is a linkage group; R1 is a hydrogen atom or the like; R2 is the same or different, and each represents a hydrogen atom or the like; and A is a quaternary ammonium group, and a silyl group represented by general formula (2):
An object of the present invention is to provide a metal oxide particle having a surface modified with a quaternary ammonium group, and a method for producing the particle. The present invention relates to a metal oxide particle having a surface modified with a silyl group and having an aggregation ratio (average particle size measured by dynamic light scattering/average diameter of primary particles measured in an SEM image) of 5.0 or less, the silyl group being at least one group selected from the group consisting of a silyl group represented by general formula (1): —Si(X)n-[L-CR1(OH)—C(R2)2-A]3-n (1), wherein X is the same or different, and each represents a hydroxy group or the like; n is 0, 1, or 2; L is a linkage group; R1 is a hydrogen atom or the like; R2 is the same or different, and each represents a hydrogen atom or the like; and A is a quaternary ammonium group, and a silyl group represented by general formula (2):
An object of the present invention is to provide a metal oxide particle having a surface modified with a quaternary ammonium group, and a method for producing the particle. The present invention relates to a metal oxide particle having a surface modified with a silyl group and having an aggregation ratio (average particle size measured by dynamic light scattering/average diameter of primary particles measured in an SEM image) of 5.0 or less, the silyl group being at least one group selected from the group consisting of a silyl group represented by general formula (1): —Si(X)n-[L-CR1(OH)—C(R2)2-A]3-n (1), wherein X is the same or different, and each represents a hydroxy group or the like; n is 0, 1, or 2; L is a linkage group; R1 is a hydrogen atom or the like; R2 is the same or different, and each represents a hydrogen atom or the like; and A is a quaternary ammonium group, and a silyl group represented by general formula (2):
wherein X′ is the same or different, and each represents a hydroxy group or the like; n′ is 0, 1, or 2; L′ is a linkage group; and A′ is a quaternary ammonium group.
Provided is a hydrophobic silica powder that can be obtained by the sol-gel process, and that is excellent in charge properties. The hydrophobic silica powder has a hydrophobicity of 50% or more, a saturated water content of 4% or less, and a nitrogen content of 0.05% or more.
The present invention addresses the problem of providing colloidal silica for metal polishing, whereby a high polishing rate can be achieved. The aforementioned problem can be solved by this colloidal silica for metal polishing, containing silica particles in which a functional group including at least one carboxyl group is fixed to the surfaces thereof via a covalent bond.
The purpose of the resent invention is to provide: a colloidal silica which contains, with high purity, silica particles that have an adequate true specific gravity, high association ratio and high alkoxy group content; and a production method by which the colloidal silica is able to be produced easily, and which enables reduction in the production cost. The present invention relates to a colloidal silica which is characterized in that: the silica particles contained in the colloidal silica have an average primary particle diameter of 33 nm or more, an association ratio of 1.2 or more and a true specific gravity of 1.95 or more, while containing 1,000 ppm by mass or more of alkoxyl groups per 1 g of the silica particles; the ratio of the number of silica particles that have a circle-equivalent diameter of less than 20 nm is less than 15%; and 5 μmol or more of a primary amine is contained per 1 g of the silica particles.
The present invention provides colloidal silica having a small particle size (for example, a primary particle size of 20 nm or less) and containing silica particles including an alkoxy group, and a method for the production thereof. The purpose of the present invention is to provide colloidal silica having a small particle size and containing silica particles in which an increase in average secondary particle size after storage is suppressed, and a method for the production thereof. The present invention relates to colloidal silica in which the average primary particle size of the silica particles is 20 nm or less, the value of the ratio (m/n) of the alkoxy group content m (ppm) and the average primary particle size n (nm) of the silica particles is 300 or greater, the true specific gravity of the silica particles is 1.95 or greater, and the average secondary particle size increase rate according to a storage stability test of the silica particles is 12% or less.
The present invention provides: a colloidal silica that has excellent compactness, contains, with high purity, deformed silica particles having a high alkoxy group amount per unit area, and has excellent abrasion properties; and a production method enabling easy production of the colloidal silica at reduced manufacturing cost. The present invention provides a colloidal silica containing silica particles having a bent structure and/or a branched structure, and is characterized in that the silica particles have a true specific gravity of 1.95 or more, the value of the ratio (m/n) of the amount m (ppm) of alkoxy groups contained in the silica particles and the average primary particle size n (nm) of the silica particles is 200 or more, and 15% or more of silica particles observed in any visual field of a scanning electron microscope at 200,000 times magnification have a bent structure and/or a branched structure.
The present invention provides: a colloidal silica which contains silica particles that exhibits excellent retainability of surface unevenness under basic conditions, while having excellent compactness; and a production method by which this colloidal silica is able to be produced. The present invention provides a colloidal silica which contains silica particles having surface unevenness, and which is characterized in that: (1) the silica particles have an alkoxy group content of 1,000 ppm or more; and (2) if the silica particles are heated under basic conditions, the decrease rate of the specific surface area is 15.0% or less.
nn-[L-CR1(OH)-C(R223-n3-n [in the formula, X moieties may be the same as, or different from, each other, and are each a hydroxyl group or the like; n is 0, 1 or 2; L is a linking group; R1is a hydrogen atom or the like; R2 moieties may be the same as, or different from, each other, and are each a hydrogen atom or the like, and A is a quaternary ammonium group] and silyl groups represented by general formula (2) [in the formula, X' moieties may be the same as, or different from, each other, and are each a hydroxyl group or the like; n' is 0, 1 or 2; L' is a linking group; and A' is a quaternary ammonium group].
This disclosure provides an agent for improving plant growth, the agent significantly improving resistances to a wide variety of stress possibly subjected to a plant, such as resistances to chemical stress and ultraviolet ray stress as well as resistances to temperature stress and dry stress, the agent having a high safety. This agent for improving plant growth alleviates an environmental stress on a plant, promotes plant growth, or a plant quality. This agent for improving plant growth contains, as its main ingredient, zerumbone, an analog of zerumbone, or a salt of zerumbone or the analog. Furthermore, in this agent for improving plant growth, the analog of zerumbone is α-humulene or β-caryophyllene.
A01N 35/06 - Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical containing keto or thioketo groups as part of a ring, e.g. cyclohexanone, quinoneDerivatives thereof, e.g. ketals
A01N 27/00 - Biocides, pest repellants or attractants, or plant growth regulators containing hydrocarbons
A01N 65/48 - Zingiberaceae [Ginger family], e.g. ginger or galangal
A01G 7/06 - Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
34.
HYDROPHOBIC SILICA POWDER, METHOD FOR PRODUCING SAME, AND TONER RESIN PARTICLES
The present invention provides: a hydrophobic silica powder which has a charge-controllable surface for which separation of a charge control agent such as quaternary ammonium salt is suppressed, and which is capable of imparting electrostatic properties in a suitable range to toner resin particles to which hydrophobic silica particles are added externally; and toner resin particles to which the hydrophobic silica powder is added externally. This hydrophobic silica powder is characterized in that (1) it has a hydrophobicity of 50% or more, (2) an extraction amount X of at least one compound selected from the group consisting of a quaternary ammonium ion, a monoazo complex, and a mineral acid ion by a mixed solvent of methanol and a methanesulfonic acid solution is 0.1 mass% or more, and (3) the X and an extraction amount Y of the compound by water satisfy formula (I). Y/X<0.15 (I)
Provided is a hydrophobic silica powder which is obtained by a sol-gel method and has excellent chargeability. The hydrophobic silica powder is characterized by having a hydrophobicity of 50% or more, a saturated water content of 4% or less, and a nitrogen content of 0.05% or more.
The present invention provides an agent for improving plant growth which is highly safe and greatly improves not only resistance to temperature stress and dry stress, but also resistance to a wide range of stresses to which plants can be exposed, including chemical stress and UV stress. The agent for improving plant growth alleviates the environmental stress on plants, promotes plant growth, and improves quality. The main component of the agent is zerumbone or an analog thereof, or a salt of those. Moreover, the analog of zerumbone is characterized in being α-humulene or β-caryophyllene.
A01N 35/06 - Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical containing keto or thioketo groups as part of a ring, e.g. cyclohexanone, quinoneDerivatives thereof, e.g. ketals
A01G 7/06 - Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
A01N 27/00 - Biocides, pest repellants or attractants, or plant growth regulators containing hydrocarbons
A01N 65/00 - Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
A01N 65/22 - Lamiaceae or Labiatae [Mint family], e.g. thyme, rosemary, skullcap, selfheal, lavender, perilla, pennyroyal, peppermint or spearmint
A01N 65/28 - Myrtaceae [Myrtle family], e.g. teatree or clove
A01N 65/48 - Zingiberaceae [Ginger family], e.g. ginger or galangal
The growth agent for multicellular algae according to the present invention solves problems pertaining to seaweed cultivation, there being provided a growth agent for multicellular algae that strengthens resistance against various types of stress and promotes growth for common multicellular algae. The main component of the growth agent is any of the following: zerumbone, sanguinarine, salicylic acid, polyamine, geldanamycin, isothianate, trimethyl glycine, perillaldehyde, citral, carotene, lycopene, zeaxanthin, cryptoxanthin, lutein, phenylethylisothiocyanate, ursolic acid, yabatsui, arnica, Inula britannica, Inula linariaefolia, salvia, marjoram, Scutellaria baicalensis, Amomum villosum, amomum seed, Alpinia galanga, Angelica acutiloba, pepper, Citrus unshiu, or Citrus aurantium.
A01N 35/06 - Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical containing keto or thioketo groups as part of a ring, e.g. cyclohexanone, quinoneDerivatives thereof, e.g. ketals
A01N 27/00 - Biocides, pest repellants or attractants, or plant growth regulators containing hydrocarbons
A01N 31/06 - Oxygen or sulfur directly attached to a cycloaliphatic ring system
A01N 33/04 - Nitrogen directly attached to aliphatic or cycloaliphatic carbon atoms
A01N 35/02 - Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having two bonds to hetero atoms with at the most one bond to halogen, e.g. aldehyde radical containing aliphatically bound aldehyde or keto groups, or thio-analogues thereofDerivatives thereof, e.g. acetals
A01N 37/36 - Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio-analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio-analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids
A01N 37/40 - Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio-analogue, or a derivative thereof, and a singly bound oxygen or sulfur atom attached to the same carbon skeleton, this oxygen or sulfur atom not being a member of a carboxylic group or of a thio-analogue, or of a derivative thereof, e.g. hydroxy-carboxylic acids having at least one oxygen or sulfur atom attached to an aromatic ring system having at least one carboxylic group or a thio-analogue, or a derivative thereof, and one oxygen or sulfur atom attached to the same aromatic ring system
A01N 37/44 - Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio-analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio-analogue of a carboxylic group, e.g. amino-carboxylic acids
A01N 43/42 - Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings condensed with carbocyclic rings
A01N 43/46 - Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom rings with more than six members
A01N 43/90 - Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
A01N 47/46 - Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides containing —N=C=S groups
Provided are a feed for aquatic animals and a growth promoter for aquatic animals that result in the healthy growth of fish and impart strong recovery capabilities thereto, even when water temperatures are substantially higher than normal growth temperatures, and can improve the resilience to stress for fish as well as aquatic animals such as crustaceans. The feed for aquatic animals and growth promoter for aquatic animals are characterized by comprising zerumbone as the main ingredient; or by being a zingiberaceae plant extract or granulated product; or by being a zingiber zerumbet extract or granulated product; or by comprising sanguinarine or a sanguinarine salt or a derivative of sanguinarine or a sanguinarine salt.
A61K 31/122 - Ketones having the oxygen atom directly attached to a ring, e.g. quinones, vitamin K1, anthralin
A61K 31/132 - Amines, e.g. amantadine having two or more amino groups, e.g. spermidine, putrescine
A61K 31/198 - Alpha-amino acids, e.g. alanine or edetic acid [EDTA]
A61K 31/26 - Cyanate or isocyanate estersThiocyanate or isothiocyanate esters
A61K 31/395 - Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
A61K 31/4425 - Pyridinium derivatives, e.g. pralidoxime, pyridostigmine
A61K 31/4741 - QuinolinesIsoquinolines ortho- or peri-condensed with heterocyclic ring systems condensed with ring systems having oxygen as a ring hetero atom, e.g. tubocuraran derivatives, noscapine, bicuculline
This invention provides a dense, high-purity colloidal silica containing silica secondary particles having a branched and/or bent structure, and a production method thereof. Specifically, this invention provides a method for producing a colloidal silica, comprising the steps of 1) preparing a mother liquid containing an alkali catalyst and water, and having a pH of 9 to 12; and 2) adding a hydrolysis liquid obtained by hydrolysis of an alkyl silicate to the mother liquid, wherein the step of adding the hydrolysis liquid to the mother liquid sequentially comprises A) step 1 of adding the hydrolysis liquid until the pH of the resulting liquid mixture becomes less than 7; B) step 2 of adding an aqueous alkali solution until the pH of the liquid mixture becomes 7 or more; and C) step 3 of adding the hydrolysis liquid while maintaining the pH of the liquid mixture at 7 or more, and a colloidal silica containing silica secondary particles having a branched and/or bent structure, obtained by this method.
Disclosed is a sulfonic acid-modified aqueous anionic silica sol which is highly stable under acidic conditions, while having a low metal impurity content and good filtration properties. Also disclosed is a method for producing the sulfonic acid-modified aqueous anionic silica sol. Specifically disclosed are: a method for producing a sulfonic acid-modified aqueous anionic silica sol, wherein a silane coupling agent having a functional group which can be chemically converted into a sulfonic acid group is added to colloidal silica, and then the functional group is converted into a sulfonic acid group; and a sulfonic acid-modified aqueous anionic silica sol which is obtained by the method and has a zeta-potential of not more than -15 mV in an acidic environment with a pH of 2 or more.
Disclosed is a dense and high-purity colloidal silica containing silica secondary particles each having a branched structure or a bent structure. Also disclosed is a method for producing the colloidal silica. Specifically disclosed is a method for producing a colloidal silica comprising: (1) a step of preparing a matrix liquid containing an alkaline catalyst and water and having a pH of 9-12; and (2) a step of adding a hydrolysis liquid, which is obtained by hydrolyzing an alkyl silicate, into the matrix liquid. The method for producing a colloidal silica is characterized in that the step of adding the hydrolysis liquid into the matrix liquid sequentially comprises: (A) a step 1 wherein the hydrolysis liquid is added until the pH of the mixed liquid is less than 7; (B) a step 2 wherein an alkaline aqueous solution is added until the pH of the mixed liquid is not less than 7; and (C) a step 3 wherein the hydrolysis liquid is added while maintaining the pH of the mixed liquid to not less than 7. Also specifically disclosed is a colloidal silica characterized by containing silica secondary particles produced by the production method and each having a bent structure and/or a branched structure.
B24D 3/02 - Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special natureAbrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
This invention provides a high-purity, high-concentrated silica sol with long-term stability and low viscosity by preventing viscosity-increase after production, and method for producing the same. In one embodiment, the silica sol produced by an alkoxide method comprises at least a dispersing agent and silica, wherein the concentration of said dispersing agent is 10-3000 ppm with respect to the silica, wherein said dispersing agent may be an inorganic acid, inorganic acid salt, organic acid or organic acid salt whose degradation temperature and boiling point are both 60° C. or higher, wherein said silica sol has a silica concentration of 20% weight or higher.
Disclosed is a silica particle which is dense and contains metal impurities in less quantities. Specifically disclosed is a colloidal silica produced by using an alkyl silicate as a raw material. When a sample is prepared by adding 1% by weight of polydimethylsilane (as an internal standard) to a dried product of the colloidal silica and solid-state 29Si-CP/MAS-NMR spectra are measured on the sample, a peak area ratio as calculated in accordance with the formula: (a peak area for the colloidal silica)/(a peak area for polydimethylsilane) is 15 or less. Also disclosed is a method for producing the colloidal silica.
Disclosed is a high-purity aluminum-modified colloidal silica which is stable in an acidic region. Also disclosed is a method for producing such an aluminum-modified colloidal silica. Further disclosed is a simple method for producing such an aluminum-modified colloidal silica at a low temperature of not more than 100˚C. Specifically disclosed is a method for producing an aluminum-modified colloidal silica having an alkali metal content of not more than 50 ppm, which comprises the following steps (1)-(3). (1) a step wherein an aqueous aluminate solution is added to a colloidal silica obtained by an alkoxide method and having a pH of 6-10 so that the Al2O3/SiO2 molar ratio is within the range of 0.00005-0.01 (2) a step wherein the colloidal silica obtained in step (1) is maintained at 60-100˚C for a certain period of time (3) a step wherein an aluminum-modified colloidal silica is obtained by removing, if necessary, alkali ions in the colloidal silica obtained in step (2)
Disclosed is a method for producing a colloidal silica using silicon metal as a raw material, which enables to produce a colloidal silica having high concentration and low viscosity. Also disclosed a method for producing a colloidal silica using silicon metal as a raw material, which enables to produce a colloidal silica in short time with high yield without comprising a concentration step. Further disclosed is a method for producing a colloidal silica, which enables to easily control the particle size of silica contained in a colloidal silica. Specifically disclosed is a method for producing a colloidal silica comprising a step for obtaining a colloidal silica by reacting silicon metal (Si) with water in an aqueous solution containing an alkaline catalyst and a dispersing agent, wherein the dispersing agent is composed of one or more ionic substances selected from inorganic acids, organic acids and their salts. Also specifically disclosed is a method for producing a colloidal silica comprising a step for controlling the particle size of silica by adjusting the addition rate of silicon metal into an aqueous solution containing an alkaline catalyst and a dispersing agent.
01 - Chemical and biological materials for industrial, scientific and agricultural use
03 - Cosmetics and toiletries; cleaning, bleaching, polishing and abrasive preparations
Goods & Services
Chemicals for industrial purpose; silica sol for industrial
purpose; organo silica sol for industrial purpose; chemical
silica for industrial purpose such as globular silica,
hollow silica, porous silica and mesoporous silica;
alkoxysilane for industrial purpose such as methyl silicate,
propyle silicate and fused silicate; organic acid for
industrial purpose such as citric acid and malic acid;
silica compound composed of silica and oxides except for
silica oxides, such as titania coated silica and silica
coated titania; silica compound composed of organic
substances and silica; coating agents consisting of
colloidal silica for forming antireflection film;
antireflection coating agents; silica type coating agents;
chemicals for use in manufacture of paints and inks;
chemicals for use in plastics molding; anti-static
preparations except for household use; detergents for use in
manufacturing processes; detergents for metal substrates for
use in manufacturing semi-conductors; detergents for
semi-conductors; auxiliary fluid for use with abrasives;
coolants for industrial purpose; coolants for use in cutting
with wire saws; mold-release preparations; unsticking and
separating preparations; soil improving agents; finishing
preparations for use in the manufacture of steel. Abrasive cloth; abrasive sheets; abrasive paper; abrasives
except for hand tool use; abrasive slurry; abrasive slurry
for polishing of chemical processing machines; abrasives for
semi-conductors; abrasives for semi-conductor wafers;
furbishing preparations except for auxiliary fluid for use
with abrasives and dental abrasives; abrasive grains; fixed
abrasive grains.
[PROBLEMS] To provide a high-concentration and high-purity silica sol which is inhibited from viscosity increase in the state of a manufactured article and is therefore stable and lowly viscous over a long period and a process for the production of the silica sol; and to provide a high-concentration and high-purity silica sol produced by a process which comprises incorporating a dispersant in a specific concentration into a reaction fluid or a solvent-replaced concentrate and thereby enables the production of silica sol without viscosity increase or gelation independently of the size of silica particles contained in the sol and a process for the production of the silica sol. [MEANS FOR SOLVING PROBLEMS] A silica sol synthesized by an alkoxide method which contains a dispersant and silica as the essential components, characterized in that the dispersant is contained in a concentration of 10 to 3000ppm based on the silica and consists of at least one member selected from among inorganic acids, inorganic acid salts, organic acids and organic acid salts whose decomposition temperatures and boiling points are 60° or above and the silica concentration of the sol is 20wt% or above; and a process for the production of the silica sol.
01 - Chemical and biological materials for industrial, scientific and agricultural use
03 - Cosmetics and toiletries; cleaning, bleaching, polishing and abrasive preparations
Goods & Services
Chemicals for industrial purposes; chemicals, namely, silica sol for industrial purposes; chemicals, namely, organo silica sol for industrial purposes [ ; chemical silica for industrial purposes such as globular silica, hollow silica, porous silica and mesoporous silica; chemicals, namely, alkoxysilane for industrial purposes such as methyl silicate, propyle silicate and fused silicate; organic acid for industrial purposes such as citric acid and malic acid; chemicals for industry, namely, silica compound composed of silica and oxides except for silica oxides, such as titania coated silica and silica coated titania; silica compound composed of organic substances and silica; chemicals for industry, namely, coating agents consisting of colloidal silica for forming antireflection film; chemicals for industry, namely, antireflection coating agents; chemicals for industry, namely, silica type coating agents; chemicals for use in manufacture of paints and inks; chemicals for use in plastics molding; anti-static preparations except for household use; detergents for use in manufacturing processes; detergents for metal substrates for use in manufacturing semi-conductors; detergents for semi-conductors; chemicals for industrial purposes, namely, auxiliary fluid for use with abrasives; coolants for industrial purposes; coolants for use in cutting with wire saws; mold-release preparations, namely, silica sol for industrial purposes, organo silica sol for industrial purposes, chemical silica for industrial purposes and compositions comprising organic acid for industrial purposes; unsticking and separating preparations, namely, silica sol for industrial purposes, organo silica sol for industrial purposes, chemical silica for industrial purposes and composition comprising organic acid for industrial purposes; soil improving agents; finishing preparations for use in the manufacture of steel, namely, silica sol for industrial purposes, organo silica sol for industrial purposes, chemical silica for industrial purposes and composition comprising organic acid for industrial purposes] [ Abrasive cloth; abrasive sheets; abrasive paper; industrial abrasives used in the manufacture of electronic components, electronic devices, and precision machinery and apparatus; abrasives for polishing of chemical processing machines; furbishing preparations except for auxiliary fluid for use with abrasives and dental abrasives, namely, silica sol, organo silica sol, chemical silica and compositions comprising organic acid ]
