Abstract

Described is a method for preparation of stable fatty alcohol emulsion, wherein, fatty acid esters are introduced into an antifoaming agent emulsion system, and an anionic surfactant is added in the late stage of emulsification process in order to further improve the stability of the emulsion. The anionic surfactant is absorbed to the surface of fatty alcohol particles to make the fatty alcohol emulsion more stable under the action of ionic mutual repulsion. The prepared fatty alcohol emulsion has favorable foam elimination and suppression performance in the paper making procedure, and is stable during storage.

IPC Classes  ?

• C08K 13/00 - Use of mixtures of ingredients not covered by any single one of main groups , each of these compounds being essential
• D21H 21/12 - Defoamers
• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• D21H 17/00 - Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution

Abstract

The present invention relates to a crosslinked network polymer obtained on the basis of an addition reaction of a hydrogen-containing polyorganosiloxane, an organic silicon resin and an unsaturated hydrocarbon, followed by the process of adding a crosslinking agent containing an active group and silicon dioxide; the polymer has an improved defoaming performance, good anti-foaming effect, and is easy to handle and process, and the addition of an emulsifier does not reduce the anti-foaming effect. The polymer has a good anti-foaming performance with no decay, and the polymer formed therefrom can easily be processed.

IPC Classes  ?

• C08G 77/12 - Polysiloxanes containing silicon bound to hydrogen
• C08L 83/05 - Polysiloxanes containing silicon bound to hydrogen

Abstract

A process for preparing a particle defoamer. The particle defoamer of 55%-75% of a carrier, 15%-35% of a silicone emulsion, 3%-10% of a texturing agent and 2%-10% of a solvent, based on the total weight of the particle defoamer; the process for preparing the particle defoamer is: (1)first adding a carrier A1 into a mixer, and then adding thereto a silicone emulsion B1, and stirring uniformly; (2)adding a carrier component A2 to the mixture obtained in (1), and stirring uniformly; (3)adding a silicone emulsion B2 to the mixture obtained in (2), and, after uniformly stirring, adding the solvent thereto and stirring uniformly; and (4)pelleting and drying by baking the mixture obtained in(3), so as to produce the product.

IPC Classes  ?

• C11D 9/36 - Organic compounds containing silicon
• C11D 3/00 - Other compounding ingredients of detergent compositions covered in group
• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• C11D 3/37 - Polymers
• C11D 11/00 - Special methods for preparing compositions containing mixtures of detergents

Abstract

An organosilicon composition and a manufacturing method thereof. Under the effect of an acid catalyst, random copolymerization reaction is performed jointed between hydrogen-containing polyorganosiloxane, an organosilicon resin and α-olefin, so as to form a alkylation modified polyorganosiloxane with a long branch chain space structure; and mixture processing is performed by adding silicon dioxide. The organosilicon composition has a foam control capability, and particularly, can control the height of foams in a washing process when the organosilicon composition is added in different detergent products.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

The present invention provides a method for preparing stable fatty alcohol latex, characterized in that, fatty acid ester is introduced into a defoamer latex system, anionic surfactant is added into a later stage of emulsification process in order to further enhance the stability of the latex, and the anionic surfactant is adsorbed on the surface of fatty alcohol particles, so as to enable the fatty alcohol latex to be more stable through repellency between ions. The prepared fatty alcohol latex has good defoaming performance in papermaking process, and can be stored stably.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances
• D21H 21/12 - Defoamers

Abstract

A process for preparing a particle defoamer. The particle defoamer consists of 55% - 75% of a carrier, 15% - 35% of a silicone emulsion, 3% - 10% of a texturing agent and 2%-10% of a solvent, based on the total weight of the particle defoamer; the process for preparing the particle defoamer is:(1) first adding a carrier A1 into a mixer, and then adding thereto a silicone emulsion B1,and stirring uniformly; (2) adding a carrier component A2 to the mixture obtained in (1), and stirring uniformly; (3) adding a silicone emulsion B2 to the mixture obtained in (2), and, after uniformly stirring, adding the solvent thereto and stirring uniformly; and (4) pelleting and drying by baking the mixture obtained in (3), so as to produce the product.

IPC Classes  ?

• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

A new defoamer for papermaking wet end consists of the following components：（1）5-99 % of fatty acid methyl ester derivatives with a structure general formula of R1CO(EO)x(PO)yOCH3, wherein R1 is a linear or branched chain alkyl group with a carbon atom number of 1-30, x and y are respectively an integer of 0-150, which has a molecular weight of 300-3000 and a cloud point of 20-80℃ and is a product prepared by an addition reaction with ethylene oxide (EO) and/or propylene oxide (PO) under the action of a catalyst by using fatty acid methyl ester as starting agent；（2）0.1-80% of polyether, which has a structure general formula of R2｛M(EO)ｍ(PO)ｎH｝ａ,a molecular weight of 500-8,000 and a cloud point of 10-80℃，wherein R2 is a linear or branched chain alkyl group with a carbon atom number of 1-30, M is a bivalent group of -O-,-CO- or -N-,m and n are respectively an integer of 1-150, and a is a value less than or equal to the number of carbon atoms of R2;（3）0.1-70% of modified polyether, which has a structure general formula of R2｛M(EO)ｍ(PO)ｎR3｝ａ, wherein R2, M, m, n and a are respectively as defined in polyether of component（2）, and Ｒ3 is a alkyl or acyl group represented by a general formula of CH3(CH2)p(CO)q-, wherein p is an integer of 1-20, q is 0 or 1；（4）0.1-20% of natural oil. The defoamer is not only suitable for a papermaking wet end working procedure, but also suitable for the treatment of papermaking waste water and the elimination of other water-phase foams.

IPC Classes  ?

• D21H 21/12 - Defoamers
• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

A process of dispersing the mixture of natural higher fatty alcohol and synthetic higher aliphatic alcohol into water, which is in the technical field of fine chemical industry. The emulsion mixture of natural higher fatty alcohol and synthetic higher aliphatic alcohol obtained by such process comprises: (1) 1-30% of 14-30C synthetic higher aliphatic alcohol; (2) 1-15% of 12-18C natural higher saturated fatty alcohol; (3) 1-15% of waxes; (4) 0.1-5% of an nonionic surfactant of formula MO(EO)m(PO)nH, where M is alkyl group or phenyl group which is an starter group of the nonionic surfactant; (5) 0.1-5% of one or more anionic surfactants selected from sulfonated castor oil salt, sulfonated fatty acid glyceride, alkyl sulfate, alkoxy sulfate, alkyl-aryl sulfonate and alkyl polyoxyethylene ether sodium sulfate; (6) 0.1-5% of thickening agents; (7) 60-95% of dispersant water. The process comprises: (1) mixing the components of synthetic higher aliphatic alcohol, natural higher fatty alcohol, waxes, nonionic surfactants and anionic surfactants at a certain ratio, then heating to 80-95oC; (2) adding water with an temperature of 60-80oC slowly to the mixture and emulsifying at an temperature of at least 60 oC; (3) after all the hot water added to the mixture, the mixture being charged into an colloid mill; (4) cooling to 30-40 oC followed by adding thickening agents to the mixture and stirring, then said emulsion mixture is obtained.

IPC Classes  ?

• D21C 3/28 - Prevention of foam
• D21H 21/12 - Defoamers
• B01F 17/38 - Alcohols, e.g. oxidation products of paraffins
• B01D 19/04 - Foam dispersion or prevention by addition of chemical substances

Abstract

A silicone composition emulsion and preparing method thereof. The preparing method for the emulsion comprises the following steps: a silicone composition having high viscosity is well mixed with polysiloxane having low molecular weight for 20-40 minutes; an emulsifying agent is added to the resulting mixture, which is then stirred for 15-45 minutes and heated to 55-85ºC; water is added and the stirring speed is increased to convert the W/O-type latex into O/W-type latex and to obtain an emulsion having mass concentration of 20-60%. The obtained emulsion is treated with a colloid mill and emulsified, and diluted with water.

IPC Classes  ?

• C08J 3/03 - Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
• C08L 83/04 - Polysiloxanes
• C08L 83/06 - Polysiloxanes containing silicon bound to oxygen-containing groups
• C08L 83/08 - Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen