摘要:
Branched polyesters with sulfonate groups obtainable by the reaction of the components A, B, optionally C and optionally D to give branched polyesters, where the component A is selected from the group of α,β-olefinically unsaturated dicarboxylic acids, and the component B is selected from the group of tri- or higher-functional alcohols, the optional component C is selected from the group of difunctional alcohols or of difunctional carboxylic acids without α,β-olefinically unsaturated bonds, the optional component D is selected from fatty acids or fatty alcohols, and the subsequent reaction of the resulting branched polyesters with hydrogen sulfite, where the molar amount of hydrogen sulfite is at most 95 mol %, based on the amount of α,β-olefinically unsaturated dicarboxylic acid.
摘要:
Branched polyesters with sulfonate groups obtainable by the reaction of the components A, B, optionally C and optionally D to give branched polyesters, where the component A is selected from the group of α,β-olefinically unsaturated dicarboxylic acids, and the component B is selected from the group of tri- or higher-functional alcohols, the optional component C is selected from the group of difunctional alcohols or of difunctional carboxylic acids without α,β-olefinically unsaturated bonds, the optional component D is selected from fatty acids or fatty alcohols, and the subsequent reaction of the resulting branched polyesters with hydrogen sulfite, where the molar amount of hydrogen sulfite is at most 95 mol %, based on the amount of α,β-olefinically unsaturated dicarboxylic acid.
摘要:
Branched polyesters with sulfonate groups can be obtained by reacting components A, B, optionally C, and optionally D to yield branched polyesters, then reacting these branched polyesters with hydrogen sulfite. Component A is at least one α,β-olefinically unsaturated dicarboxylic acid, component B is at least one di- or higher-functional alcohol, optional component C is at least one di- or higher-functional carboxylic acid or hydroxycarboxylic acid without an α,β-olefinically unsaturated bond, and optional component D is at least one compound of formula CH3(—O—CH2—CH2)n—OH. In reacting the branched polyesters with hydrogen sulfite, a molar amount of hydrogen sulfite is at most 95 mol %, based on an amount of α,β-olefinically unsaturated dicarboxylic acid.
摘要:
Branched polyesters obtained by polycondensation of citric acid with at least one polyalcohol having at least two hydroxyl groups and, if desired, further polycarboxylic acid components, the molar ratio of citric acid to polyalcohol being 2.4:1 to 1:3.
摘要:
Branched polyesters with sulfonate groups can be obtained by reacting components A, B, optionally C, and optionally D to yield branched polyesters, then reacting these branched polyesters with hydrogen sulfite. Component A is at least one α,β-olefinically unsaturated dicarboxylic acid, component B is at least one di- or higher-functional alcohol, optional component C is at least one di- or higher-functional carboxylic acid or hydroxycarboxylic acid without an α,β-olefinically unsaturated bond, and optional component D is at least one compound of formula CH3(—O—CH2—CH2)n—OH. In reacting the branched polyesters with hydrogen sulfite, a molar amount of hydrogen sulfite is at most 95 mol %, based on an amount of α,β-olefinically unsaturated dicarboxylic acid.
摘要:
The invention relates to dosage forms which contain preparations of poorly water-soluble substances in a polymer matrix of polyether copolymers, said polyether copolymers being obtained by the radically initiated polymerization of a mixture from 30 to 80% by weight of N-vinyl lactam, 10 to 50% by weight of vinyl acetate and 10 to 50% by weight of a polyether, and at least one poorly water-soluble polymer, the poorly water-soluble substance being present in the polymer matrix as an amorphous substance.
摘要:
A coating material, containing a mixture of i) a polymer obtained by radical polymerization from a) N,N-diethylaminoethyl methacrylate, and b) at least one radically polymerizable compound, selected from esters of α,β-ethylenically unsaturated mono- and dicarboxylic acids with C1-C18 alkanols, as component A, ii) one or more antioxidants as component B, iii) one or more plasticizers as component C, and iv) other excipients as components D, wherein the total amount of the mixture of components A-D is 100 wt. %.
摘要:
Described is a process for producing pulverulent, antioxidant-comprising coating compositions, comprising providing an aqueous polymer dispersions comprising one or more antioxidants and a polymer obtained by radical polymerization of a) N,N-diethylaminoethyl methacrylate, and b) at least one radically polymerizable compound selected from esters of α,β-ethylenically unsaturated mono- and dicarboxylic acids with C1-C8-alkanols, wherein the antioxidants are incorporated into the aqueous polymer dispersion in the form of a solution or of a dispersion, and spray processing the aqueous polymer dispersion to provide a powder form.
摘要:
Process for the production of nanoporous foamed active substance-containing preparations, wherein the active substance is present embedded in a pharmaceutically acceptable polymer, wherein, in stage a) loading of a polymeric molding composition or a polymer melt with a propellant is effected at a pressure and at a temperature at which the propellant is in the supercritical state, in stage b) heating of the laden polymer molding compound or melt is carried out under pressure at a temperature which lies in the range from −40 to +60° C., preferably −20 to +55° C., and especially preferably 0 to +50° C. around the glass transition temperature of the unladen (prior to loading) polymeric molding compound and in stage c) a depressurization of the polymeric molding compound or melt laden in stage a) and heated under pressure in stage b) is effected out with a depressurization rate in the range from 15,000 to 200,000 MPa/sec.
摘要:
Process for the preparation of low-peroxide crosslinked vinyllactam polymer by free-radical polymerization in the presence of at least one organic substance acting as antioxidant, low-peroxide crosslinked vinyllactam polymer obtainable by this process, and its use.