摘要:
Liquid-crystalline carbamyl-containing polycondensates composed of(a) aromatic hydroxycarboxylic and/or aminocarboxylic acids in which the hydroxyl and amino groups are not vicinal to the carboxyl group,(b) from 0.1 to 20 mol % of urea,(c) aromatic dihydroxy, diamino and/or hydroxy-amino compounds in which the hydroxyl and amino groups are not vicinal,(d) a molar amount equivalent to the total amount of components b and c of an aromatic dicarboxylic acid in which the carboxyl groups are not vicinal,the preparation thereof and fibers, films and moldings prepared therefrom.
摘要:
Fully aromatic mesomorphic polyesters which give a liquid crystalline filament-forming melt below 300.degree. C. consist of(a) from 5 to 25 mol % of repeating units of the formula I ##STR1## (b) from 5 to 25 mol % of repeating units of the formula II ##STR2## (c) from 10 to 50 mol % of repeating units of the formula III ##STR3## and (d) not less than 10 mol % of repeating units of the formula IV ##STR4## the sum of the molar amounts of components (a), (b), (c) and (d) being 100 mol %, and the molar ratio of components (a) and (b) to component (c) being from 0.9:1 to 1.1:1.
摘要:
An aqueous polymer emulsion contains a dispersed polymer A, which is obtainable by free radical aqueous emulsion polymerization of different monomer compositions in two successive stages and has ureido groups, and a polyaldehyde compound.
摘要:
An aqueous polymer emulsion is obtained by polymerizing first a monomer composition 1 in a first polymerization stage and then a monomer composition 2 in a polymerization stage 2, in each case by the free radical aqueous emulsion polymerization method, one of the two monomer compositions essentially comprising hard monomers and the other monomer composition essentially comprising soft monomers, and, in addition to the monomer compositions 1 and 2, nitrogen-containing adhesion-promoting monomers being polymerized, at least 20 mol % of the total amount of the adhesion-promoting monomers being polymerized in polymerization stage 1.
摘要:
An aqueous polymer dispersion having a solids volume concentration of 50% by volume or more is obtainable by polymerizing radical polymerizable monomers other than vinyl or vinylidene halides by the method of free radical aqueous emulsion polymerization with the addition of an aqueous starting polymer dispersion having a certain diameter distribution of the starting polymer particles present therein by the stream addition process.
摘要:
An aqueous polymer dispersion with a solids volume concentration of at least 50% by volume is obtainable by polymerizing monomers by the method of free radical aqueous emulsion polymerization with the addition of at least one fine and at least one coarse aqueous starting polymer dispersion.
摘要:
An aqueous polymer dispersion having a solids volume concentration of 50% by volume or more is obtainable by polymerizing radical polymerizable monomers other than vinyl or vinylidene halides by the method of free radical aqueous emulsion polymerization with the addition of an aqueous starting polymer dispersion having a certain diameter distribution of the starting polymer particles present therein by the stream addition process.
摘要:
UV-crosslinkable materials based on (meth)acrylate copolymers and containing special modified unsaturated benzophenone derivatives as copolymerized units are used as hotmelt adhesives, for coating sheet-like mineral substrates and as surface coatings.
摘要:
Wholly aromatic mesomorphic polyester amide imides which form a liquid-crystalline fiber-forming melt below 320.degree. C. and are composed of(a) from 5 to 35 mole % of repeat units of the formula I and/or II ##STR1## where the Xs is the formulae I and II can be identical or different and each is --O--, --S--, --SO.sub.2 --, --CO--, --CH.sub.2 -- or .dbd.C(CH).sub.3).sub.2 and n is 0 or 1.(b) from 0 to 30 mole % of repeat units of the formulae III and/or IV ##STR2## (c) a molar amount corresponding to the total amount of components a and b of one or more of the repeat units of the formulae V, VI, VII, VIII and IX ##STR3## (d) if desired from 5 to 25 mole % of one or more of the repeat units of the formulae X, XI and XII ##STR4## (e) repeat units of the formula XIII ##STR5## the mole percentages of components (a), (b), (c), (d) and (e) adding up to 100 mole % in each case,the preparation thereof and fibers, films and moldings prepared therefrom.
摘要:
Wholly aromatic mesomorphic polyester amide imides which form a liquid-crystalline fiber-forming melt below 320.degree. C. and are composed of(a) from 5 to 35 mole % of repeat units of the formula I and/or II ##STR1## where the Xs in the formulae I and II can be identical or different and each is --O--, --S--, --SO.sub.2 --, --CO--, --CH.sub.2 --or .dbd.C(CH.sub.3).sub.2 and n is 0 or 1,(b) from 0 to 30 mole % of repeat units of the formulae III and/or IV ##STR2## (c) a molar amount corresponding to the total amount of components a and b of one or more of the repeat units of the formulae V, VI, VII, VIII and IX ##STR3## (d) if desired from 5 to 25 mole % of one or more of the repeat units of the formulae X, XI and XII ##STR4## (e) repeat units of the formula XIII ##STR5## the mole percentages of components (a), (b), (c), (d) and (e) adding up to 100 mole % in each case,the preparation thereof and fibers, films and moldings prepared therefrom.