C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 133/06 (2006.01) C08G 18/62 (2006.01) C08G 18/73 (2006.01) C08G 18/80 (2006.01) C09D 133/08 (2006.01) C09D 133/10 (2006.01) C09D 175/04 (2006.01)
Patent
CA 2487916
The present invention provides one-component compositions which comprise one or more hydroxyl functional acrylic resin having a glass transition temperature (Tg) of from -100°C to -10°C and one or more dialkyl dicarboxylic acid ester endcapped polyisocyanate crosslinker, such as the isocyanurate of isophorone diisocyanate (IPDI), and flexible, environmental etch resistant coatings made therefrom. The acrylic resins comprise the polymerized reaction product of one or more flexibility conferring monomers, e.g, butyl acrylate, and provide the coating with its flexibility. The one or more dialkyl dicarboxylic acid ester endcapped polyisocyanate and the hydroxyl groups in the one or more acrylic resins react to cure at lower temperatures than current one-component blocked isocyanate coatings. Alternatively, one-component coating compositions consists essentially of one or more rigid hydroxyl functional acrylic resin and one or more dialkyl dicarboxylic acid ester endcapped aliphatic polyisocyanates. The present invention provides coated, environmental etch resistant exterior automotive plastic parts, such as bumpers, fascia, body trim and body molding.
Drescher James Conrad Jr.
Muller Lisa Marie
Neubeck Hans Bernhart
Tokash Robert D.
Gowling Lafleur Henderson Llp
Nippon Paint (usa) Inc.
Rohm And Haas Company
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