Abrégé

A method for preparing 2-amino-4-methylthio-butanoic acid or 2-hydroxy-4-methylthio-butanoic acid by using 2,3-tetrahydrofurandione. The method mainly comprises the following steps: subjecting lactic acid and formaldehyde to enzymatic catalysis to synthesize an intermediate 2,3-tetrahydrofurandione, then using a chemical method to synthesize α-keto-γ-methylthiobutanoic acid or a salt thereof, and then carrying out an enzyme-catalyzed reaction to respectively synthesize 2-amino-4-methylthio-butanoic acid or 2-hydroxy-4-methylthio-butanoic acid.

Classes IPC  ?

• C12N 15/52 - Gènes codant pour des enzymes ou des proenzymes
• C12N 9/04 - Oxydoréductases (1.), p. ex. luciférase agissant sur des groupes CHOH comme donneurs, p. ex. oxydase de glucose, déshydrogénase lactique (1.1)
• C12N 9/02 - Oxydoréductases (1.), p. ex. luciférase
• C12N 9/10 - Transférases (2.)
• C12N 9/12 - Transférases (2.) transférant des groupes contenant du phosphore, p. ex. kinases (2.7)
• C12N 9/16 - Hydrolases (3.) agissant sur les liaisons esters (3.1)
• C12N 9/00 - Enzymes, p. ex. ligases (6.)ProenzymesCompositions les contenantProcédés pour préparer, activer, inhiber, séparer ou purifier des enzymes
• C12P 7/18 - Polyols
• C12P 7/24 - Préparation de composés organiques contenant de l'oxygène contenant un groupe carbonyle
• C12P 7/40 - Préparation de composés organiques contenant de l'oxygène contenant un groupe carboxyle
• C12P 7/52 - Acide propioniqueAcides butyriques
• C12P 7/56 - Acide lactique
• C07D 307/60 - Deux atomes d'oxygène, p. ex. anhydride succinique
• C12P 11/00 - Préparation de composés organiques contenant du soufre
• C12P 13/00 - Préparation de composés organiques contenant de l'azote
• C12P 13/12 - MéthionineCystéineCystine

Abrégé

The present application provides a pentamethylene diamine derivative, a method for purifying a pentamethylene diamine derivative, and a method for using a pentamethylene diamine derivative and phosgene to prepare a pentamethylene diisocyanate by means of a liquid phase method. The present application also provides an apparatus for implementing the methods of the present application.

Classes IPC  ?

• C07C 271/02 - Acides carbamiquesSels d'acides carbamiques
• C07C 263/10 - Préparation de dérivés d'acide isocyanique par réaction d'amines avec des halogénures de carbonyle, p. ex. avec du phosgène
• C07C 265/14 - Dérivés d'acide isocyanique contenant au moins deux groupes isocyanate liés au même squelette carboné
• C12P 13/00 - Préparation de composés organiques contenant de l'azote

Abrégé

Disclosed is an aqueous polyurethane dispersion. Raw materials for preparing the aqueous polyurethane dispersion comprise a combination of a prepolymer, a chain extender, and an external emulsifier. Raw materials for preparing the prepolymer comprise, in parts by weight, 7-15 parts of isocyanate, 25-43 parts of a polyol, and 0.2-2 parts of a reactive internal emulsifier, wherein the isocyanate comprises 1,5-pentamethylene diisocyanate, and the mass percentage of the 1,5-pentamethylene diisocyanate in the isocyanate is greater than or equal to 30%. The aqueous polyurethane dispersion has the viscosity less than 800 (23°C, mPa.s), the light transmittance greater than 89%, and the water absorption less than 4%.

Classes IPC  ?

• C08G 18/66 - Composés des groupes , ou
• C08G 18/44 - Polycarbonates
• C08G 18/48 - Polyéthers
• C08G 18/34 - Acides carboxyliquesLeurs esters avec des composés monohydroxylés
• C08G 18/32 - Composés polyhydroxylésPolyaminesHydroxyamines
• C08G 18/12 - Procédés mettant en œuvre un prépolymère impliquant la réaction d'isocyanates ou d'isothiocyanates avec des composés contenant des hydrogènes actifs, dans une première étape réactionnelle utilisant plusieurs composés contenant un hydrogène actif dans le premier stade de la polymérisation
• C09D 175/08 - Polyuréthanes à partir de polyéthers
• C09D 175/04 - Polyuréthanes
• C09J 175/08 - Polyuréthanes à partir de polyéthers
• C09J 175/04 - Polyuréthanes

Abrégé

The present application provides a method for purifying an amine salt (e.g., pentanediamine carbonate). According to the method, the amine salt (e.g., pentanediamine carbonate) is heated, flash-evaporated, and sublimed to obtain a purified gaseous amine salt (e.g., pentanediamine carbonate) which is directly used for further preparation of isocyanate (e.g., pentamethylenediisocyanate), and there is no need to use an alkaline substance to treat the amine salt to form a free-state amine for further preparation of isocyanate (e.g., pentamethylenediisocyanate). The present application further provides a method for preparing isocyanate (e.g., pentamethylenediisocyanate) from an amine salt (e.g., a pentanediamine salt) and phosgene. The present application further provides a device for implementing the method of the present application.

Classes IPC  ?

• C07C 209/84 - Purification
• C07C 263/10 - Préparation de dérivés d'acide isocyanique par réaction d'amines avec des halogénures de carbonyle, p. ex. avec du phosgène
• C07C 265/14 - Dérivés d'acide isocyanique contenant au moins deux groupes isocyanate liés au même squelette carboné

Abrégé

The present application relates to a method for preparing an isocyanate. Specifically, in the method of the present application, phosgene (especially liquid phosgene) is used as a quench medium to prepare isocyanate.

Classes IPC  ?

• C07C 263/10 - Préparation de dérivés d'acide isocyanique par réaction d'amines avec des halogénures de carbonyle, p. ex. avec du phosgène

Abrégé

A polyurethane prepolymer composition and a preparation method therefor and a use thereof. The polyurethane prepolymer composition is aliphatic isocyanate end-capped, and is obtained by reacting aliphatic isocyanate with polyol; the mass percentage content of 1,5-pentamethylene diisocyanate in the aliphatic isocyanate is greater than or equal to 50%; the polyurethane prepolymer composition comprises a combination of a first prepolymer and a second prepolymer, the first prepolymer is an adduct formed by aliphatic isocyanate and polyol according to a molar ratio of 2:1, and the second prepolymer is an adduct formed by aliphatic isocyanate and polyol according to a molar ratio of (n+1):n, wherein n≥2; the mass percentage content of the second prepolymer in the polyurethane prepolymer composition is 15-75%. The polyurethane prepolymer composition has the advantages of large molecular weight, low viscosity and excellent constructability, and the physical properties of a polyurethane product prepared by means of the polyurethane prepolymer composition is remarkably improved.

Classes IPC  ?

• C08G 18/73 - Polyisocyanates ou polyisothiocyanates acycliques
• C08G 18/48 - Polyéthers
• C08G 18/10 - Procédés mettant en œuvre un prépolymère impliquant la réaction d'isocyanates ou d'isothiocyanates avec des composés contenant des hydrogènes actifs, dans une première étape réactionnelle
• C08G 18/42 - Polycondensats contenant des groupes ester carboxylique ou carbonique dans la chaîne principale
• C08G 18/32 - Composés polyhydroxylésPolyaminesHydroxyamines
• C08G 18/66 - Composés des groupes , ou
• C08G 18/65 - Composés à bas poids moléculaire contenant un hydrogène actif avec des composés à haut poids moléculaire contenant un hydrogène actif

Abrégé

The present application provides a method for preparing L-glufosinate. The method mainly comprises the following steps: addition and rearrangement and ring-opening reactions on a ring lactone with a substituted phosphate-type phosphine reagent, and then obtaining L-glufosinate upon post-treatment. In the present application, L-glufosinate is prepared by using a method of reacting a ring lactone compound with a substituted phosphate-type compound, and a leaving group reagent is not used in the method. The method has the advantages such as short steps, high yield, and some routes not needing to be split apart since a raw material is a chiral compound.

Classes IPC  ?

• C07F 9/30 - Acides phosphiniques [R2=P(:O)OH]Acides thiophosphiniques
• C07F 9/32 - Leurs esters
• C07C 235/12 - Amides d'acides carboxyliques, le squelette carboné de la partie acide étant substitué de plus par des atomes d'oxygène ayant des atomes de carbone de groupes carboxamide liés à des atomes de carbone acycliques et des atomes d'oxygène, liés par des liaisons simples, liés au même squelette carboné le squelette carboné étant acyclique et saturé ayant l'atome d'azote d'au moins un des groupes carboxamide lié à un atome de carbone acyclique d'un radical hydrocarboné substitué par des groupes carboxyle
• C07D 307/33 - Atomes d'oxygène en position 2, l'atome d'oxygène étant sous la forme céto ou énol non substituée
• C07C 231/12 - Préparation d'amides d'acides carboxyliques par des réactions n'impliquant pas la formation de groupes carboxamide

Abrégé

The present application provides a modified bio-based waterborne polyurethane, a method for preparing same, and use thereof. The modified bio-based waterborne polyurethane is prepared from the following starting materials: 50-150 parts by weight of a bio-based polyol, 5-30 parts by weight of a diisocyanate, 0.1-10 parts by weight of a reactive emulsifier, 20-200 parts by weight of an alkenyl-containing monomer, and 0.01-5 parts by weight of an initiator, wherein the diisocyanate includes aliphatic diisocyanates containing an odd number of carbon atoms. According to the present application, by means of the design and compounding of the starting materials, the modified bio-based waterborne polyurethane is made to have an adjustable thermal activation temperature, high film-forming strength, good weather resistance, complete resistance to yellowing, good adhesion to different substrates, excellent bonding performance, heat resistance, water resistance, hydrolysis resistance, stability, and high bio-base content. The modified bio-based waterborne polyurethane is prepared using a solvent-free method and is an environmentally friendly high-performance waterborne polyurethane product.

Classes IPC  ?

• C08G 18/83 - Polymères modifiés chimiquement
• C08G 18/12 - Procédés mettant en œuvre un prépolymère impliquant la réaction d'isocyanates ou d'isothiocyanates avec des composés contenant des hydrogènes actifs, dans une première étape réactionnelle utilisant plusieurs composés contenant un hydrogène actif dans le premier stade de la polymérisation
• C08F 290/00 - Composés macromoléculaires obtenus par polymérisation de monomères sur des polymères modifiés par introduction de groupes aliphatiques non saturés terminaux ou latéraux
• C09J 151/08 - Adhésifs à base de polymères greffés dans lesquels le composant greffé est obtenu par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carboneAdhésifs à base de dérivés de tels polymères greffés sur des composés macromoléculaires obtenus autrement que par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carbone

Abrégé

The present application relates to a method for preparing isocyanate. Specifically, the present application provides a method for preparing isocyanate by combining a supercritical phosgenation method with a piping method.

Classes IPC  ?

• C07C 263/04 - Préparation de dérivés d'acide isocyanique à partir de, ou en passant par des carbamates ou des halogénures de carbamoyle
• C07C 263/20 - SéparationPurification
• C07C 265/14 - Dérivés d'acide isocyanique contenant au moins deux groupes isocyanate liés au même squelette carboné

Abrégé

The present application relates to a method for preparing isocyanate. Specifically, in the method of the present application, phosgene (especially liquid phosgene) is used as a quench medium to prepare isocyanate.

Classes IPC  ?

• C07C 265/14 - Dérivés d'acide isocyanique contenant au moins deux groupes isocyanate liés au même squelette carboné
• C07C 263/20 - SéparationPurification

Produits et services

Industrial chemicals; Chemicals for use in the manufacture of polyurethanes; Synthetic resins, unprocessed; Polyurethanes; Polyamide; Vitamins for the food industry; Vitamins for use in the manufacture of pharmaceuticals; Vitamins for use in the manufacture of cosmetics; Leather-dressing chemicals; Glue for industrial purposes; Polyurethane adhesives for industrial purposes. Vitamin preparations; Disinfectants; Nutritional supplements; Depuratives; Dietary supplements for animals; Vitamins for animals; Medicated additives for animal feeds; Medicated animal feed; Herbicides; Wadding for medical purposes; Dental mastics.

Produits et services

Industrial chemicals; Chemicals for use in the manufacture of polyurethanes; Synthetic resins, unprocessed; Polyurethanes; Polyamide; Vitamins for the food industry; Vitamins for use in the manufacture of pharmaceuticals; Vitamins for use in the manufacture of cosmetics; Leather processing chemical preparations; Glue for industrial purposes; Polyurethane adhesives for industrial purposes Vitamin preparations; Disinfectants; Nutritional supplements; Depuratives for the body; Dietary supplements for animals; Vitamins for animals; Animal feed additive for use as a nutritional supplement for medical purposes; Medicated animal feed; Herbicides; Wadding for medical purposes; Dental mastics

Produits et services

Industrial chemicals; synthetic resins, unprocessed; plastics, unprocessed; polymer resins, unprocessed; polyurethane; leather-dressing chemicals; leather-waterproofing chemicals; curing agent; industrial polyurethane adhesives; glue for industrial purposes. Dyestuffs; pigments; food colorants; printing ink; wood coatings used as paints; paints; binding preparations for paints; coatings used as paints; waterproof coatings [paints] in powdered form; anti-corrosive preparations. Bandages for dressings; wadding for medical purposes; dressings, medical; adhesive tapes for medical purposes; adhesive bands for medical purposes; surgical dressings; scapulars for surgical purposes; adhesive plasters; absorbent wadding; dental mastics. Synthetic rubber; rubber, raw or semi-worked; caulking materials; sealant compounds for joints; synthetic resins, semi-processed; plastic substances, semi-processed; non-conducting materials for retaining heat; insulating materials; stuffing of rubber or plastics; waterproof packings; refractory fiber. Trimmings of leather for furniture; umbrellas. Refractory construction materials, not of metal; plastic flooring; plastic pipes for building; rubber flooring; roof coverings, not of metal; building materials, not of metal; coatings used as building materials; binding material for road repair; binding agents for making stones. Wrapping or binding bands, not of metal; ropes; awnings of synthetic materials; tarpaulins made from plastic-coated materials; nets; tarpaulins; bags of textile for packaging, namely, envelopes and pouches; nylon woven bags, namely, imitations of sacks; stuffing, not of rubber, plastics, paper or cardboard; raw fibrous textile. Waterproof clothing; mountaineering shoes; football shoes; sports shoes; boots; footwear; heelpieces for footwear; insoles for shoes; soles for footwear; footwear uppers.

Produits et services

(1) Industrial chemicals namely chemical additive for use in the manufacture and preservation of food; industrial chemicals for use in the agricultural industry namely chemical additive for use in insecticides; industrial chemicals for use in the manufacture of adhesives, fabric or textiles, varnish, paints, pigments, polyurethane, absorbing carbons, sealants, soap, solvents, synthetic rubber, unprocessed artificial resins; industrial chemicals, namely, acetone, glycerine, polyurethanes, unprocessed elastomer resins, enzyme preparations for the alcohol industry, bakery industry, beverage industry, biofuel industry, chemical industry, detergent industry, food industry, fuel industry, and textile industry, fireproof chemicals, glue for industrial purposes, namely, for use in the automobile industry, for use in the lumber industry, fabric glue, gelatine glue, gum arabic glue, latex glue and wood glue, waste water treatment chemicals and chemical coatings for preserving foodstuffs; synthetic resins, unprocessed; plastics, unprocessed; polymer resins, unprocessed; polyurethane; leather-dressing chemicals; leather-waterproofing chemicals; curing agent namely chemical compounds for curing concrete; curing agents namely epoxy; curing agents namely isocyanate; curing agent namely polyamide; curing agents namely mold release compounds for use in the rubber industry; curing agents namely mold release compounds for use in the plastic industry; curing agents namely mold release compounds for use in concrete fabrication; industrial polyurethane adhesives; gelatin glue for industrial purposes; glue for industrial purposes, namely glue for use in the automobile, furniture, footwear, packaging, and battery industries, glue for use in the lumber industry, glue for use in the canning industry, leather glues. (2) Dyestuffs; pigments for ink for printers; food colorants, paint pigment powders, interior and exterior paint pigments, colour pigments for use in the manufacture of clothing; printing ink; coatings for wood as paints; paints namely acrylic paints, polymer paints, oil paints, paint for use in the manufacture of furniture, paint for use in the manufacture of ceramics, paint for use in the manufacture of automobiles, paint for use in industrial building construction; binding preparations for paints; coatings used as paints namely coatings for wood, concrete and metal in the nature of paints, anti-friction coatings in the form of paints, automotive coatings; waterproof coatings namely paints in powdered form for use in the automobile, furniture, construction, and machinery industries; waterproof coatings [paints] in powdered form namely coating compositions in the nature of paint for industrial equipment, industrial floors, construction equipment, vehicle and building panels; waterproof coatings [paints] in powdered form namely coating compositions in the nature of interior and exterior paints for architectural applications; anti-corrosive preparations namely anti-corrosion greases, anti-corrosion paints, anti-corrosion waxes, anti-corrosion oils. (3) Bandages for dressings; wadding for medical purposes; dressings, medical; adhesive tapes for medical purposes; adhesive bands for medical purposes; surgical dressings; scapulars for surgical purposes; adhesive plasters; absorbent wadding; dental mastics. (4) Synthetic rubber; rubber, raw or semi-worked; caulking materials; sealant compounds for joints; synthetic resins, semi-processed; plastic substances, semi-processed namely, adhesive-coated plastic sheets, extruded plastics in the form of bars for use in manufacture, filtering materials of semi-processed films of plastic, thermoplastic elastomer resins in pellet form for use in manufacture, semi-processed thermoplastic rubber for use in manufacture, semi-processed cellulose acetate, natural and synthetic polymeric membranes and filtering materials being semi-processed polymer films in roll form for use in manufacturing filtration media, natural and synthetic polymeric membranes and filtering materials being semi-processed polymer films in sheet form for use in manufacturing filtration media, semi-finished acrylic molded plastic substances, unprocessed and semi-processed asbestos substitutes, unprocessed and semi-processed gutta-percha substitutes; non-conducting materials for retaining heat namely composite insulating shield for automobiles and machinery, low-density polyurethane foam for packing, stuffing material of plastic and glass beads, tamping material made of elastomeric, polymeric and thermosetting copolymeric material in the form of pellets for use as filling material for synthetic grounds; insulating materials namely polyurethane films for use in sealing and insulating buildings, acoustic insulating materials, building insulation namely insulating slabs and insulating sheathing, electrical insulation, insulating and protective dielectric materials and coatings for use on electric vehicle batteries, foam insulation for use in building and construction; stuffing of rubber or plastics; waterproof packings namely for clothing, furniture, batteries and food; waterproof packings namely for shipping container; waterproof packings namely waterproofing membranes for foundations of buildings, waterproof membranes of polymers for walls; refractory fiber namely insulating refractory materials, refractory materials used for thermal insulation being melamine fibres, refractory materials used for thermal insulation being carbon precursor fibres, refractory ceramic fiber insulation. (5) Trimmings of leather for furniture; umbrellas. (6) Refractory construction materials, not of metal namely refractory bricks, refractory clay, refractory concrete, refractory sand, refractory roof tiles; plastic flooring; plastic pipes for building namely rigid plastic pipes for building, plastic storm sewer pipes for construction, plastic water pipes, plastic gutter pipes; rubber flooring; roof coverings, not of metal; building materials, not of metal namely facade claddings, not of metal, for building, non-metal building construction materials namely, roof, façade, wall and floor coverings and their parts and fittings, namely, self-adhered and synthetic roofing underlayment, non-metal building construction materials namely, roof, façade, wall and floor coverings and their parts and fittings, namely, weatherboards, non-metal building materials, namely spacer stocks and frames made of plastic for spacing glass and metal sheets, non-metal building construction materials namely, roof, façade, wall and floor coverings and their parts and fittings, namely, polycarbonate and bitumen corrugated sheets; coatings used as building materials namely bituminous coatings for roofing, building materials in the form of plastic composite coatings, roof coatings, bitumen-based coatings for doors and windows of wood and synthetic materials, coatings for concrete, namely, coatings for use in fireproofing concrete, waterproofing concrete, polishing concrete, and restoring concrete; binding material for road repair; binding agents for making stones. (7) Wrapping or binding bands, not of metal; ropes; awnings of synthetic materials; tarpaulins made from plastic-coated materials; nets namely commercial nets, chemical fiber netting, polyester plastic netting for packaging goods, garden nets, netting for protection against birds and insects, rockfall prevention nets; tarpaulins; bags of textile for packaging, namely, envelopes and pouches; nylon woven bags, namely, imitations of sacks for the transport and storage of materials in bulk; stuffing, not of rubber, plastics, paper or cardboard namely cotton flock for stuffing, polyester stuffing fibers, artificial animal hair for stuffing purposes; raw fibrous textile namely raw cotton, raw line, raw jute fiber, raw wool, raw textile fibres, synthetic fibers and filaments for use in the manufacture of fabrics, textiles, yarns, and carpets. (8) Waterproof clothing namely waterproof jackets and pants; mountaineering shoes; football shoes; sports shoes; boots; footwear namely shoes; heelpieces for footwear; insoles for shoes; soles for footwear; footwear uppers namely boot uppers, shoes uppers.

Produits et services

Industrial chemicals; synthetic resins, unprocessed; plastics, unprocessed; polymer resins, unprocessed; polyurethane; Leather-dressing chemicals, namely, chemical products for glazing leather; leather-dressing chemicals, namely, chemical agents for impregnating, binding or coating of leather; leather-waterproofing chemicals; curing agent for synthetic resin; curing agent, namely, curing agent dispersion for the preparation of clear coats, enamels and primers; industrial polyurethane adhesives; glue for industrial purposes Dyestuffs; pigments; food colorants; printing ink; wood coatings used as paints; paints; binding preparations for paints; Pigmented coatings used as paints; clear coatings used as paints; weatherproofing coatings used as paints; waterproof coatings used as paints; waterproof coatings used as paints in powdered form; anti-corrosive preparations, namely, anti-corrosive coatings, anti-corrosive oils and anti-corrosive waxes Bandages for dressings; wadding for medical purposes; dressings, medical; adhesive tapes for medical purposes; adhesive bands for medical purposes; surgical dressings; scapulars for surgical purposes; adhesive plasters for medical purposes; absorbent wadding for dressings; absorbent wadding for medical purposes; dental mastics Synthetic rubber; rubber, raw or semi-worked; caulking materials; sealant compounds for joints; synthetic resins, semi-processed; plastic substances, semi-processed; nonconducting materials for retaining heat, namely, insulating materials; insulating materials; stuffing of rubber or plastics; waterproof packing for shipping containers; waterproof packing material for forming seals; waterproof packings for pipes; refractory fiber being insulating refractory materials Trimmings of leather for furniture; umbrellas Refractory construction materials, not of metal; non-metal floors comprised of plastic for office buildings; non-metal floors comprised of plastic for outdoor use; plastic pipes for use as building materials; rubber flooring; roof coverings, not of metal; building materials, not of metal, namely, stone veneers and concrete poles for use as building materials; reinforcing materials not of metal for building purposes; building materials, not of metal, namely, non-metal floors comprised primarily of fiberglass and plastic for office buildings and outdoor use; coatings used as building materials, namely, fireproof cement coatings and bituminous roof coatings; asphalt-based coatings for use on building foundations; tar coatings for use on roofs, walls and pavements; binding material for road repair, namely, tar-based asphalt sealants; binding agents for making stones in the nature of cement aggregates Wrapping or binding bands, not of metal; ropes; awnings of synthetic materials; tarpaulins made from plastic-coated materials; Nets, namely, non-metal net wrapping for pallets and garden nets; snare nets; camouflage nets; swimming pool skimming nets; fishing nets for industrial purposes; commercial fishing nets; tarpaulins; bags of textile for merchandise packaging, namely, envelopes and pouches; Nylon woven bags, namely, imitations of sacks for packaging; stuffing, not of rubber, plastics, paper or cardboard; raw fibrous textile Waterproof clothing, namely, waterproof footwear, waterproof jackets and pants; mountaineering shoes; football shoes; sports shoes; boots; footwear; heelpieces for footwear; insoles for shoes; soles for footwear; footwear uppers