Dispersants for emulsion paints

C - Chemistry – Metallurgy – 09 – D

Patent

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C09D 7/02 (2006.01) C09D 5/02 (2006.01) C09D 17/00 (2006.01)

Patent

CA 2209370

A pigment dispersant, for instance for incorporation in an emulsion paint containing non-reactive or reactive pigment, is a water-soluble copolymer of monomer units derived from two or more monomers of the formula CH2 = CR1 - COOR2 wherein R1 is methyl in 75 to 85 mol % of the monomer units and is hydrogen in the remainder, and R2 is hydrogen or a cation in 75 to 85 mol % of the monomer units and is C1-8 alkyl in the remainder of the monomer units and wherein at least 80 % of the R2 alkyl groups are butyl groups.

La présente invention concerne un dispersant pigmentaire destiné à être incorporé, par exemple, dans une peinture-émulsion contenant un pigment réactif ou non-réactif. Ce dispersant est un copolymère hydrosoluble d'unités monomères dérivées d'au moins deux monomères représentés par la formule CH¿2? = CR¿1? - COOR¿2?. Dans cette formule, R¿1? est méthyle pour 75 à 85 % des moles des unités monomères et hydrogène pour le reste. R¿2? est hydrogène ou un cation pour 75 à 85 % des moles des unités monomères et alkyle C¿1-8? pour le reste des unités monomères, 80 % au moins des groupes alkyle de R¿2? étant des groupes butyle.

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