摘要:
Aqueous dispersions contain a polyurethane which consists essentially ofa) organic polyisocyanates and, if required, minor amounts of monoisocyanates,b) dihydroxy compounds having a molecular weight of from more than 500 to 10,000 g/mol and at least 2 carboxyl or carboxylate groups in the molecule and which are obtainable by reacting dihydroxy compounds with tetracarboxylic dianhydrides in a molar ratio of from 2:1 to 1.05:1,c) if required, polyhydroxy compounds which differ from (b) and have a molecular weight of from more than 500 to 5,000 g/mol,d) if required, compounds having at least one group which is reactive toward isocyanate and at least one anionic group or group convertible into an anionic group and having a molecular weight of from 60 to 500 g/mol ande) if required, compounds which differ from d) and e) and have at least 2 groups which are reactive toward isocyanate and a molecular weight of from 60 to 500 g/mol.
摘要:
Wholly aromatic mesomorphic polyester 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 formulae I and/or II ##STR1## where the Xs and n's can be identical or different, each X being --O--, --S--, --SO.sub.2 --, --CO--, --CH.sub.2 -- or .dbd.C(CH.sub.3).sub.2 and n being 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 or VIII ##STR3## (d) not less than 10 mole % of repeat units of the formula IX ##STR4## (e) if desired from 5 to 25 mole % of repeat units of the formula X ##STR5## the molar proportions of components a, b, c, d, and e adding up to 100 mole % in each case,and the preparation thereof.
摘要:
Cationically stabilized aqueous styrene/(meth)acrylate copolymer emulsions whose dispersed copolymer has a static glass transition temperature of from 40 to 110.degree. C. and which contain, as a dispersant, a mixture of at least one organic monoamine of .gtoreq.8 carbon atoms and an acid addition salt thereof are used as binders for moldings based on finely divided materials having a negative surface charge.
摘要:
Aqueous polymer compositions which contain a polymer having ureido groups and a polyaldehyde compound are suitable for the production of coatings having high adhesion to substrate and having high cohesion.
摘要:
An aqueous polymer dispersion with a final solids volume concentration of at least 50% by volume is obtainable by polymerizing at least one radical polymerizable monomer by the method of free radical aqueous emulsion polymerization with the addition of an aqueous dispersion of a starting polymer.
摘要:
Aqueous formulations suitable as sealing compounds or adhesives for ceramic tiles essentially containA) from 3 to 30% by weight of plastics particles which consist ofa) from 0.1 to 4% by weight of one or more mercaptosilanes of the general formula I ##STR1## where n is from 1 to 8, R.sup.1 and R.sup.2 are hydrogen and/or C.sub.1 -C.sub.4 -alkyl, R.sup.3, R.sup.4 and R.sup.5 are C.sub.1 -C.sub.6 -alkyl and/or C.sub.1 -C.sub.6 -alkoxy, with the proviso that one or more of the radicals R.sup.3 to R.sup.5 is alkoxy, andb) ethylenically unsaturated monomers capable of undergoing free radical polymerization, as the residual amount, the polymer having a glass transition temperature of from -60 to +40.degree. C.,B) from 40 to 90% by weight of an inorganic filler,C) an effective amount of an emulsifier,D) from 0 to 15% by weight external plasticizer andE) from 5 to 40% by weight of water.
摘要:
Wholly aromatic mesomorphic polyesters which form a liquid-crystalline fiber-forming melt below 320.degree. C. and are composed of(a) not less than 10 mol % of repeat units of the formula I ##STR1## (b) a molar amount equivalent to the total amount of components (c) and (d) of repeat units of the formula II ##STR2## (c) from 3 to 20 mol % of repeat units of the formulae III and/or IV ##STR3## and (d) from 5 to 30 mol % of repeat units of the formula V ##STR4## the molar proportions of components a, b, c and d adding up to 100 mol % in each case, the preparation thereof and moldings and coatings prepared therefrom.
摘要:
Wholly aromatic, mesomorphic polyesters which give a homogeneous liquid crystalline melt at below 320.degree. C. consist of(a) not less than 10 mol % of repeating units of the formula I ##STR1## (b) from 1 to 25 mol % of repeating units of the formula II ##STR2## (c) from 5 to 20 mol % of one or more of the repeating units of the formulae III to VII ##STR3## (d) from 5 to 15 mol % of repeating units of the formula VIII ##STR4## and (e) from 10 to 60 mol % of repeating units of the formula IX ##STR5## the sum of the molar amounts of (a), (b), (c), (d) and (e) being 100 mol % in each case and the molar ratio of the components (b)+(c)+(d) to component (e) being from 0.9:1 to 1.1:1.
摘要:
An aqueous polymer dispersion with a final solids volume concentration of at least 50% by volume is obtainable by polymerizing at least one radical polymerizable monomer by the method of free radical aqueous emulsion polymerization with the addition of an aqueous dispersion of a starting polymer.
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 two starting polymer dispersions, of which one contains not only particularly finely divided but also coarsely divided polymer particles.