摘要:
The invention relates to a process for preparing alkylpolyglycosides from monomeric glycosides, oligo- or polyglycosides and alcohols according to the general scheme (Glyc-O)zH+R1—OH→(Glyc-O)z′R1 where z≧1 z′≦z, preferably from 1 to 10, (Glyc-O)— is a glycoside radical, R1 is a hydrocarbon radical which optionally contains multiple bonds and/or heteroatoms, which comprises carrying out the reaction under supercritical conditions with regard to the alcohol, preferably at pressures and temperatures which are at least 5% above the critical parameters, the alcohols serving both as the solvent and as reactants.
摘要:
The invention relates to a process for preparing alkylpolyglycosides from monomeric glycosides, oligo- or polyglycosides and alcohols according to the general scheme (Glyc-O)zH+R1—OH→(Glyc-O)z′R1 where z≧1, z′≦z, preferably from 1 to 10, (Glyc-O)— is a glycoside radical, R1 is a hydrocarbon radical which optionally contains multiple bonds and/or heteroatoms, which comprises carrying out the reaction under supercritical conditions with regard to the alcohol, preferably at pressures and temperatures which are at least 5% above the critical parameters, the alcohols serving both as the solvent and as reactants.
摘要:
The invention provides a process for preparing amino acid esters and/or their acid addition salts from monomeric or polymeric amino acids, peptides, proteins and alcohols, which comprises carrying out the reaction in supercritical alcohols, preferably at pressures and temperatures which are at least 5% above the critical parameters, the alcohols serving both as the solvent and as reactants.
摘要:
An enzymatic process for preparing ethers is disclosed which includes reacting one or more alcohols with an ether in the presence of at least one enzyme.
摘要:
The present invention describes condensation products of polyether-modified and optionally hydrophobically modified monoesters and/or -amides of &agr;, &bgr;-unsaturated dicarboxylic acids and ammonia, their preparation and use. The condensation products contain polyoxyalkylene chains bonded via ester and/or amide bonds and prepared from monoesters and/or monoamides of monoethylenically unsaturated dicarboxylic acids and ammonia or prepared from the ammonium salts of said acids, and the mixtures thereof, optionally in the presence of cocondensable compounds.
摘要:
The present invention provides a process for enzymatic preparation of acrylic esters and/or methacrylic esters of polyoxyalkylenes, and to the use thereof. The acryloyl and/or methacryloyl compounds of polyoxyalkylenes are obtainable by a process for esterifying or transesterifying acrylic and/or methacrylic acid or acrylic and/or methacrylic esters with a polyoxyalkylene of the general formula (I) wherein R1, R2, R3 and a-e are as defined in claim 1 and wherein at least one OH group is present per molecule and the sequence of the polyoxyalkylene segments (C2H4-aR2aO)b and (CcH2cO)d is arbitrary, in the presence of an enzyme which catalyzes the esterification or transesterification.
摘要翻译:本发明提供了一种用于酶制备聚氧化烯的丙烯酸酯和/或甲基丙烯酸酯的方法及其用途。 聚氧化烯的丙烯酰基和/或甲基丙烯酰基化合物可通过丙烯酸和/或甲基丙烯酸或丙烯酸和/或甲基丙烯酸酯与通式(I)的聚氧化烯酯化或酯交换的方法获得,其中R1,R2,R3和ae为 如在权利要求1中所定义的,并且其中每个分子存在至少一个OH基团,并且在催化酯化或酯交换的酶的存在下,聚氧化烯链段(C 2 H 4 -a R 2a)b和(C 1 H 8 C 10)d的序列是任意的。
摘要:
An organic phase which comprises a water-insoluble material to be encapsulated, a capsule-forming or matrix-forming monomer or prepolymer and, should this be desirable, a solvent, is dispersed in droplet form in an aqueous phase. The capsule-forming or matrix-forming monomer or prepolymer forms a sheath around the material to be encapsulated. As a capsule-forming or matrix-forming monomer, an organosilicon compound of the general formula ##STR1## is used, wherein R.sup.1 is a linear or branched, saturated or unsaturated, n-functional hydrocarbon moiety, which may be interrupted by groups containing oxygen, nitrogen or sulfur; R.sup.2 and R.sup.3 are the same or different and represent a hydrocarbon moiety with 1 to 6 carbon atoms or X; X is a hydroxyl group or a hydrolyzable group and n is a whole number greater than or equal to 1, with the proviso that, when n=1, R.sup.1 has at least 12 carbon atoms and R.sup.2 and R.sup.3 represent X or a prepolymer hereof. The method can be carried out easily and requires only one compound to form the capsules or micromatrix bodies. In the implementation of the method, no foam occurs and the method results in end products with an acceptable shelf life.
摘要:
Copolymers derived from polyamino acids with at least 75% of the units present selected from the group consisting of structural units having the general formulas (I) and (II) in which the structural elements A are identical or different trifunctional hydrocarbon radicals with 2 or 3 C atoms, wherein the copolymer contains at least three units of formula (I).
摘要:
The use of ester quats in compositions, the ester quats producing a sand-repellent action for the compositions, comprising cosmetic compositions, and the use of these cosmetic compositions having a sand-repellent action for topical application, for example for protection of the skin against ultraviolet radiation are provided. The present application in particular relates to the use of at least one ester quat based on alkanolamines in compositions, the ester quats producing a sand-repellent action for the compositions, and the acyl component of the ester quats being derived from (a) monocarboxylic acids, (b) dicarboxylic acids, (c) tricarboxylic acids, or their mixtures.
摘要:
The invention relates to compositions for controlling microorganisms comprising an effective content of mixtures of fatty acid esters of a polyol and of short-chain monocarboxylic acids and/or salts thereof.