Binder compositions comprising boric acid or boric acid salt

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 2/22 (2006.01) C08F 220/18 (2006.01) C08K 3/38 (2006.01) C09D 133/00 (2006.01) C09J 133/00 (2006.01)

Patent

CA 2746600

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 (CON-H2); and b) boric acid and/or at least one salt of boric acid.

La présente invention concerne des compositions de liant qui sont à base de dispersions de polymères et contiennent de l'acide borique ou des sels de l'acide borique en tant qu'agents de réticulation, leur procédé de préparation et leurs applications. La composition aqueuse de liant comprend : a) un polymère (P) insoluble dans l'eau sous la forme de particules polymères en dispersion présentant une température de transition vitreuse comprise entre -50 °C et 50 °C et pouvant être obtenues par polymérisation radicalaire de monomères M éthyléniquement insaturés, les monomères M comprenant : 80 à 99,9 % en poids, par rapport à la quantité totale de monomères M, d'au moins un monomère M1 monoéthyléniquement insaturé, neutre, peu soluble dans l'eau; et 0,1 à 20 % en poids, par rapport à la quantité totale de monomères M, d'au moins un monomère M2 monoéthyléniquement insaturé, qui porte au moins un groupe carboxyle et/ou au moins un groupe amide d'acide carboxylique (CONH2); et b) de l'acide borique et/ou au moins un sel de l'acide borique.

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