Abstract:
Mezcla acuosa de agentes ligantes, que contiene a) un polímero insoluble en agua en forma de partículas dispersas de polímero con una temperatura de transición vítrea enel rango de -50°C a 50°C obtenible mediante polimerización por radicales libres de monómeros M etilénicamenteinsaturados M, donde los monómeros M incluyen: * 80 a 99,9 % en peso, referido a la cantidad total de monómeros M, de por lo menos un monómero M1 monoetilénicamenteinsaturado neutro poco soluble en agua M1; y * 0,1 a 20 % en peso, referido a la cantidad total del monómeros M, de por lo menos un monómero M2 monoetilénicamenteinsaturado, que porta por lo menos un grupo carboxilo y/o por lo menos un grupo carboxamido (CONH2); y b) ácido bórico y/o por lo menos una sal del ácido bórico.
Abstract:
Producing aqueous dispersions of polyadducts from mutually reactive starting compounds comprises reacting the starting compounds in a water-miscible solvent with a boiling point above 100[deg] C, dispersing the resulting solution in water and removing the solvent to leave less than 0.5 wt.% in the dispersion. An independent claim is also included for dispersions produced as above.
Abstract:
The present invention relates to polymer dispersion-based binder compositions comprising boric acid or salts of boric acid as cross-linking agents, to a method for the production thereof and to use thereof. The aqueous binder composition comprises: a) a water-insoluble polymer (P) in the form of dispersed polymer particles with a glass transition temperature in the range of -50°C to 50°C, obtained through radical polymerization of ethylenically unsaturated monomers M, wherein the monomers M contain: 80 to 99.9 wt %, relative to the total amount of monomers M, of at least one slightly soluble neutral monoethylenically unsaturated monomer M1; and 0.1 to 20 wt %, relative to the total amount of monomers M, of at least one monoethylenically unsaturated monomer M2 that contains at least one carboxyl group and/or at least one carboxylic acid amide group (CONH2); and b) boric acid and/or at least one salt of boric acid.