ACRYLIC POLYMERS, 1K COATING COMPOSITIONS INCLUDING THE SAME, AND MULTILAYER COATING SYSTEMS INCLUDING A TOPCOAT LAYER FORMED FROM THE 1K COATING COMPOSITIONS

摘要

Acrylic polymers, 1K coating compositions including the same, and multilayer coating systems including a topcoat layer formed from the 1K coating compositions are provided herein. In an embodiment, a 1K coating composition includes an acrylic polymer having a nominal Tg of at least 25° C. and a melamine crosslinker. The acrylic polymer includes a free radical-polymerized backbone and pendant chains bonded thereto. A first pendant chain of the acrylic polymer includes a first segment and a second segment. The first segment includes an ester linkage and a secondary hydroxyl group. The second segment is connected to the first segment and includes an ester linkage and a branched hydrocarbon chain. A second pendant chain of the acrylic polymer includes a primary hydroxyl group or a urethane-containing group formed therefrom.

主权项

1. A 1K coating composition comprising:
an acrylic polymer having a nominal Tg of at least 25° C., wherein the acrylic polymer comprises:
a free radical-polymerized backbone and pendant chains bonded thereto, wherein:
a first pendant chain comprises:
a first segment comprising an ester linkage and a secondary hydroxyl group; anda second segment connected to the first segment and comprising an ester linkage and a branched hydrocarbon chain; anda second pendant chain comprising a primary hydroxyl group or a urethane-containing group formed therefrom; and a melamine crosslinker.