New high-solids binder compositions and their use

Details New high-solids binder compositions and their use New high-solids binder compositions and their use

C - Chemistry, Metallurgy

08

L

C08L 51/08 (2006.01) C08F 279/02 (2006.01) C08G 18/63 (2006.01) C08L 51/04 (2006.01) C09D 151/04 (2006.01) C09D 151/08 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2325946

The invention relates to a binder composition containing A) 50 to 90 parts by wt., preferably 90 to 60 parts by wt. of OH-functional graft copolymer resins prepared by copolymerization of a) 0.1 to 10 parts by wt. of at least one specific polybutadiene b) 5 to 60 parts by wt. of at least one unsaturated aromatic monomer, c) 10 to 50 parts by wt. of at least one specific hydroxyalkyl ester of acrylic and/or methacrylic acid, d) 5 to 70 parts by wt. of at least one specific cycloaliphatic ester of acrylic and/or methacrylic acid, e) 5 to 50 parts by wt. of at least one specific aliphatic ester of acrylic and/or methacrylic acid, f) 0.1 to 5 parts by wt. of at least one specific .alpha.,.beta.-mono- olefinically unsaturated mono- or dicarboxylic acid and/or at least one specific maleic acid or fumaric acid half-ester. B) 10 to 50 parts by wt. of a polyfunctional crosslinking agent or crosslinking agent mixture, a process for their preparation and their use for the production of coatings.

L'invention concerne une composition liante renfermant A) 50 à 90 parties en poids, idéalement 90 à 60 parties en poids, de résines de copolymère greffé avec groupement OH préparées par copolymérisation de a) 0,1 à 10 parties en poids d'au moins un polybutadiène particulier; b) 5 à 60 parties en poids d'au moins un monomère aromatique insaturé; c) 10 à 50 parties en poids d'au moins un ester hydroxyalkylique particulier d'un acide acrylique et/ou méthacrylique; d) 5 à 70 parties en poids d'au moins un ester cycloaliphatique particulier d'un acide acrylique et/ou méthacrylique; e) 5 à 50 parties en poids d'au moins un ester aliphatique particulier d'un acide acrylique et/ou méthacrylique; f) 0,1 à 5 parties en poids d'au moins demi-ester alpha, bêta-monoinsaturé en oléfines d'un acide mono ou dicarboxylique particulier et/ou d'au moins un acide maléique ou fumarique; B) 10 à 50 parties en poids d'un agent de réticulation polyfonctionnel ou d'un mélange d'agent de réticulation. L'invention concerne aussi un procédé pour leur préparation ainsi que leur utilisation dans la production de revêtements.

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