摘要:
The present invention relates to a newly identified hydrolase from thermophilic microorganisms having thermostable properties, and more specifically, to a novel thermostable hydrolase showing high activity at high temperatures.
摘要:
A high molecular weight copolymeric polyaspartic ester which has been hydrophobically modified with alkyl or alkenyl radicals having from 6 to 30 carbon atoms. The copolymers are derived from polyamino acids and have a molecular weight, Mw, of about 2500 or above.
摘要:
A method for the synthesis of betaines of the general formula ##STR1## by quaternizing the fatty acid amide dialkylamines of the general formula ##STR2## with .omega.-halogenalkylcarboxylic acids of the formula X-(CH.sub.2).sub.y COOH, wherein X is a halogen group, or their salts in aqueous solution, the reaction being carried out within a temperature range of 115.degree. to 180.degree. C., until organically bound chlorine can no longer be detected, the fatty acid amide dialkylamine optionally being quaternized partially or completely in a first step at 80.degree. to 100.degree. C.
摘要:
A liquid or pasty, storage-stable, multiple emulsion of the O.sup.1 /W/O.sup.2 type, in which O.sup.2 forms an outer phase of the multiple emulsion, a hydrophilic emulsifier being present at the O.sup.1 /W interface and a hydrophobic emulsifier being present at the W/O.sup.2 interface, is prepared where(1) the hydrophobic emulsifier has an HLB value of at most 8 anda.sub.1) a polyacrylate ester with long-chain hydrocarbon and polyoxyalkylene groups, ora.sub.2) a polyoxyalkylenepolysiloxane with long-chain alkyl groups linked to silicon atoms, and(2) the hydrophilic emulsifier is a nonionic emulsifier with an HLB value of more than 8.
摘要:
The present invention provides a process for esterifying or transesterifying acrylic acid and/or methacrylic acid or acrylic esters and/or methacrylic esters with hydroxy-functional and/or polyoxyalkylene-modified siloxane derivatives of the general formula (I) wherein R1 through R8 and v, w, x, y, and z are as defined herein and the esterification or transesterification reaction is catalyzed by an enzyme.
摘要:
The invention relates to polyglycerol partial esters of saturated or unsaturated, linear or branched fatty acids and polyfunctional carboxylic acids, which are obtainable by esterification of a polyglycerol mixture with saturated or unsaturated, linear or branched fatty acids having 12 to 22 carbon atoms and polyfunctional carboxylic acids having 4 to 54 carbon atoms and a mean functionality of from 2 to 2.4, the degree of esterification of the polyglycerol mixture being between 30 and 75%.
摘要:
The invention relates to mild, aqueous, surfactant preparations for cosmetic purposes and as detergents. These preparations contain, as surfactants, betaines of the general formula ##STR1## in which R is an alkyl group with 7 to 21 carbon atoms, 20 to 100% by weight of the betaines used as R group having an alkyl group with 7 to 9 carbon atoms, in an amount of 1.0 to 40% by weight of the preparation used. These preparations are distinguished by their exceptionally mild and low irritating properties when used, for example, in face lotions, shampoos or lotions.
摘要:
A method for the synthesis of amphoteric surfactants by the reaction of amines with chloroacetic acid or its salts in aqueous solution at an elevated temperature, consists of reacting compounds of the general formula ##STR1## with chloroacetic acid at temperatures ranging from 115.degree. to 180.degree. C., until the chloroacetic acid content is less than 10 ppm.
摘要:
An aqueous liquid solution of a betaine of the following general formula is disclosed ##STR1## in which R is an alkyl group of coconut fatty acids, preferably hydrogenated coconut fatty acids, or a fatty acid mixture which, on the average, corresponds to coconut fatty acids, wherein the solution has a solids content of at least 40% by weight, a pH of 5 to 8 and an aminoamide content of not more than 1% by weight, characterized by a content of 1 to 3% by weight, based on the solution, of one or more saturated fatty acids with, on the average, 8 to 18 carbon atoms or one or more unsaturated fatty acids with, on the average, 8 to 24 carbon atoms and 0 to 4% by weight of glycerin, based on the solution.
摘要:
The present invention relates to processes for the production of acyl compounds using an esterase having thermostable properties, and to products of such processes.