摘要:
The invention relates to the use of copolymers comprising a) 82 to 99.9 mol % of at least one monoethylenically unsaturated C3-C8-carboxylic acid; b) 0.1 to 18 mol % of at least one monomer selected from the group b1) N—C8-C30-alkyl-substituted amides of monoethylenically unsaturated C3-C8-carboxylic acids, b2) N,N—C8-C30-dialkyl-substituted amides of monoethylenically unsaturated C3-C8-carboxylic acids, b3) C8-C30-alkyl esters of monoethylenically unsaturated C3-C8-carboxylic acids; c) 0 to 17.9 mol % of at least one monomer selected from the group of c1) vinyl esters of aliphatic C8-C30-carboxylic acids, c2) C8-C30-alkylvinyl ethers, mol % data for the individual components adding up to 100%, as solubilizer.
摘要:
The present invention relates to crosslinked, water-soluble or water-dispersible polyurethanes of A) at least one water-soluble or water-dispersible polyurethane prepolymer having terminal isocyanate groups of a) at least one compound having a molecular weight in the range from 56 to 300 which contains two active hydrogen atoms per molecule, b) at least one polymer containing two active hydrogen atoms per molecule, c) at least one compound which contains two active hydrogen atoms and at least one ionogenic or ionic group per molecule, d) at least one diisocyanate, B) at least one polymer containing groups which are reactive toward isocyanate groups, chosen from hydroxyl, and primary and secondary amino and/or carboxyl groups, or the salts thereof.
摘要:
Complexes in powder form of iodine and a crosslinked polymer based on N-vinyl compounds are obtainable by dry heating of iodine and a polymer which is obtained by polymerization of monovinyl compounds (monomers A) whose vinyl group is bonded to a nitrogen atom of a nitrogen-containing heterocycle, in the presence of from 0.5 to 10% by weight, based on the monomers (A), of a compound (B) of the formula I; where A is —CH— or a nitrogen atom, and n is 2 or 3. The complexes are suitable for producing antidiarrheals.
摘要:
Adhesives for dental prostheses, comprisinga) as active adhesive ingredient partially or completely neutralized copolymers offrom 5 to 95% by weight, based on the copolymer, of one or more acrylic esters of the formula ICH.sub.2 .dbd.CR'--COOR I (monomer A),where R' is hydrogen or methyl and R is alkyl of 1 to 30 C atoms, andfrom 95 to 5% by weight of methacrylic and/or acrylic acid (monomer B), andb) a vehicle which is customary in adhesives for dental prostheses.
摘要:
Hairsetting compositions comprise, in addition to customary auxiliaries and additives,(A) from 0.5 to 15% by weight of carboxyl-containing polymers which are water-dispersible or water-soluble in neutralized form and have a glass transition temperature of above 0.degree. C.,(B) from 0.5 to 30% by weight, based on the polymer (A) employed, of polysiloxanes containing primary, secondary or tertiary amino groups,(C) from 0 to 50% of a low molecular mass neutralizing agent.
摘要:
Solid preparations are obtainable by melt extrusion ofA) at least one active compound,B) a mixture ofB1) from 10 to 90% by weight of a water-soluble, thermoplastic polymer, andB2) from 10 to 90% by weight of a low-substituted hydroxypropylcellulose, andC) from 0 to 50% by weight, based on the total amount of the preparation, of customary pharmaceutical auxiliaries.
摘要:
Copolymers which have K values of from 30 to 50 are obtainable by free radical solution polymerization ofA) from 15 to 84.99% by weight of at least one monomer selected from the group consisting of N-vinylpyrrolidone, N-vinylcaprolactam and N-vinylimidazole,B) from 15 to 84.99% by weight of further monoolefinically unsaturated monomers capable of free radical copolymerization andC) from 0.01 to 2% by weight of at least one monomer capable of free radical copolymerization and having at least two non-conjugated olefinic double bondsin alcoholic solution.
摘要:
The preparation of copolymers which form clear aqueous solutions fromA) 45 to 90% by weight N-vinylpyrrolidone,B) 10 to 55% by weight of a vinyl ester andC) 0 to 10% by weight of other copolymerizable monomersby radical polymerization in an organic solvent in the presence of a radical initiator, and removal of the organic solvent and other volatiles by distillation, entails allowing the polymerization to proceed until the N-vinylpyrrolidone content in the reaction mixture is from 5 to 1% by weight of the N-vinylpyrrolidone amount employed, substantially removing the organic solvent and other volatiles by distillation, adding water to the mixture, again adding a radical initiator and leaving the aqueous solution at from 50.degree. to 100.degree. C. for from 1 to 10 hours, and then removing volatile organic constituents virtually completely by a steam distillation.
摘要:
Polyvinylpyrrolidone having a Fikentscher K value of from 14 to 95 is prepared at from 50.degree. to 95.degree. C. in aqueous solution with hydrogen peroxide as starter, the solution being maintained at pH 7-11 by means of NaOH, KOH, their carbonates or bicarbonates.
摘要:
In dry film resists possessing a solid photopolymerizable resist layer, which is applied on a temporary base and can be developed with aqueous, in particular aqueous alkaline, media, and, if required, a cover sheet on the resist layer, the said resist layer is built from a homogeneous mixture of (a) not less than 40% by weight of one or more oligomers which contain free carboxyl groups and more than two acryloyl and/or methacryloyl groups and are soluble or dispersible in aqueous alkaline solutions, (b) from 1 to 35% by weight of one or more film-forming compatible polymers which are soluble in aqueous media, (c) from 1 to 30% by weight of one or more compatible photopolymerizable monomers, (d) from 0.001 to 10% by weight of one or more photoinitiators and (e) from 0 to 30% by weight of further additives and/or assistants. Resist images are produced on a substrate by a process employing photopolymerizable resist layers of the type stated above.