Pigment dispersing additive for coating compositions

Details Pigment dispersing additive for coating compositions Pigment dispersing additive for coating compositions

C - Chemistry, Metallurgy

08

F

C08F 222/20 (2006.01) C09D 5/36 (2006.01) C09D 7/02 (2006.01) C09D 17/00 (2006.01)

Patent

CA 2203697

A copolymer with an acid value less than one contains alternating units of a vinyl monomer and a diester of a dicarboxylic acid wherein at least one of the esterifying groups contains a polyether group. The copolymer is particularly useful in preparing pigment dispersions for coating compositions. Such compositions exhibit properties including reduced pigment settling and improved metallic flake orientation, flow and leveling.

Un copolymère avec un indice d'acidité inférieur à 1 contient des unités d'un monomère vinylique alternant avec des unités d'un diester d'un acide dicarboxylique. Au moins un des deux groupes ester contient un groupe polyéther. Le copolymère est particulièrement utile pour préparer des dispersions de pigment pour des compositions de revêtement. Ces compositions présentent des propriétés telles qu'une sédimentation diminuée des pigments, une orientation améliorée des paillettes métalliques et un écoulement et un étalement améliorés.

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