Curable coating compositions with carbamate-containing acrylic polymers

A method of making a primary carbamate functional acrylic polymer, comprising polymerizing a monomer mixture comprising a primary carbamate functional ethylenically unsaturated monomer of the structure:

• wherein X is a primary carbamate group,
• n is an integer of 2 or more,
• n′ is an integer of 1 or more,
• R0, R1, R2, R3, R4 and R5 are independently H, an alkyl group, an aromatic group, or mixtures thereof,
• at least one R1 or R2 group is not hydrogen,
• L is a linking group, and
• said primary carbamate functional ethylenically unsaturated monomer comprises the reaction product of
• (1) an ethylenically saturated monomer comprising one or more functional groups (i) which are reactive with a functional group Z but which are substantially nonreactive with a primary carbamate group X of monomeric reactive compound (2), and
• (2) a monomeric reactive compound comprising one or more structures of the formula:
• wherein
• X is a primary carbamate group,
• Z is a functional group reactive with at least one functional group of material (1) and is selected from the group consisting of hydroxy groups, halide groups, and derivatives thereof,
• n is an integer of 2 or more,
• n′ is an integer of 1 or more, and
• R0, R1, R2, R3, R4 and R5 are independently H, an alkyl group, an aromatic group, or mixtures thereof,
• with the provisos that
• (i) at least one R1 or R2 group is not hydrogen, and
• (ii) in substantially all structures of monomeric reactive compound (2),
• primary carbamate group X is attached to a carbon atom having a lower degree of substitution than a carbon atom to which functional group Z is attached.