Flexible aminoplast-curable film-forming compositions providing

Details Flexible aminoplast-curable film-forming compositions providing Flexible aminoplast-curable film-forming compositions providing

1996-01-16

1998-08-25

Short, Patricia A.

Coating processes

With post-treatment of coating or coating material

Heating or drying

4273855, 525131, 525154, 525157, 525163, 525406, 525443, 525458, C08L 6120, C08L 6702, C08L 7102

Patent

active

057981450

ABSTRACT:
A flexible, aminoplast-curable film-forming composition and a process for preparing multi-layered coated articles coated with a pigmented or colored base coat and a transparent or clear topcoat are disclosed. A pigmented or colored base coat is first applied to a substrate followed by the application of a transparent topcoat to the base coat. The transparent topcoat composition is a flexible, curable film-forming composition comprising (i) a polyether polymer containing a plurality of terminal or pendant carbamate groups of the structure: ##STR1## (ii) a polymer selected from the group consisting of a polyester polymer, a polyurethane polymer, an acrylic polymer, and mixtures thereof wherein each polymer contains a plurality of terminal or pendant carbamate groups of the structure depicted above; and (iii) an aminoplast crosslinking agent. In a particularly preferred embodiment, the film-forming composition contains a polyester polymer derived from a cycloaliphatic acid or anhydride. The topcoat composition provides a flexible composite coating with improved acid etch resistance, making the composite coating particularly useful as a topcoat for plastic automotive parts.

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