Self-cross-linking acrylic polymer containing hydroxyalkyl...

Details Self-cross-linking acrylic polymer containing hydroxyalkyl... Self-cross-linking acrylic polymer containing hydroxyalkyl...

C - Chemistry, Metallurgy

09

D

402/125

C09D 5/44 (2006.01) C08G 71/00 (2006.01) C07C 125/065 (1985.01)

Patent

CA 1262593

SELF-CROSS-LINKABLE ACRYLIC POLYMER CONTAINING HYDROXYALKYL CARBAMATE GROUPS AND COATING COMPOSITIONS CONTAINING THE SAME ABSTRACT A self-cross-linkable acrylic polymer contains at least two hydroxyalkyl carbamate groups per molecule and may comprise the reaction product of an acrylic backbone polymer containing one or more suitable reactive groups and an amine containing one primary or secondary amine group and at least one hydroxyalkyl carbamate group or precursor thereof. The amine is joined to the backbone polymer by reaction of the primary or secondary amine group thereof with suitable reactive functional groups of the resin. A method of making the acrylic polymer, which is heat curable to provide a thermoset film or coating, comprises reacting the backbone polymer with an amine containing hydroxyalkyl carbamate groups or precursors thereof comprising hydrolyzable blocked primary amine groups. When present, the blocked groups are unblocked and reacted with a cyclic carbonate to form the hydroxyalkyl carbamate groups.

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