Pigment dispersions based on water and acrylate

Details Pigment dispersions based on water and acrylate Pigment dispersions based on water and acrylate

C - Chemistry, Metallurgy

09

D

C09D 17/00 (2006.01) C09B 67/40 (2006.01) C09C 3/10 (2006.01) C09D 11/02 (2006.01)

Patent

CA 2453981

The invention relates to an aqueous pigment preparation containing an organic and/or inorganic pigment dispersed in an acrylate resin solution and a dispersion agent. The preparation is characterised in that the acrylate resin is a copolymer consisting essentially of between 50 and 80 mol % of monoalkenyl aromatic compounds and between 20 and 50 mol % of acrylates, and has an average molar mass Mv of between 1,000 and 50,000 g/mol, and in that the dispersion agent is a compound of formula (I): R -O-(CH2-CH2-O)m-CH2-COOM, wherein R is a C10-C20 alkyl radical or a C10-C20 alkenyl radical, m is a number between 1 and 15, and M is a monovalent cation.

La présente invention concerne une préparation pigmentaire aqueuse contenant un pigment organique et/ou minéral dispersé dans une solution de résine d'acrylate et un agent de dispersion. Ladite préparation se caractérise en ce que la résine acrylate est un copolymère comprenant sensiblement 50 à 80 % molaire de composés aromatiques de monoalcényle et 20 à 50 % molaire d'acrylates, et a une masse molaire moyenne Mv comprise entre 1000 et 50000 g/mol, et en ce que l'agent de dispersion est un composé de formule (I): R - O - (CH2-CH2-O)m - CH2 - COOM, dans laquelle R est un radical alkyle en C10-C20 ou un radical alcényle en C10-C20, m est un nombre de 1 à 15, et M est un cation monovalent.

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