C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
117/147, 117/7,
C09B 3/72 (2006.01) B05D 7/02 (2006.01) C08G 18/08 (2006.01) C08J 7/04 (2006.01) C09D 175/04 (2006.01)
Patent
CA 1239495
ABSTRACT This invention relates to the area of coatings, and, in particular, to a surface-sealing composition for priming and topcoating substrates made from reaction injected molded (RIM) urethane, reinforced RIM urethane, and other materials which are sensitive to the organic solvents normally present in automotive primer and paint. When automotive primer and paint are applied to damaged surfaces made of urethane foams, the urethane foam absorbs solvents from the primer and paint and swells around the areas to be repaired, leaving a wrinkle in the painted surface The coating composition of this invention is particularly useful for providing a sealed surface for priming and topcoating reaction injected molded urethane, reinforced reaction injection molded urethane, and other substrates which are sensitive to the organic solvents normally present in automotive primer and paint. The composition comprises the following essential ingredients: (1) a fully reacted, water- dilutable urethane polymer formed from the reaction of a glycol or polyol of polyester or polyether with a diisocyanate; (2) water; and (3) any monohydric alcohol having less than seven carbon atoms.
435386
Minnesota Mining And Manufacturing Company
Smart & Biggar
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