C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/131, 402/182
C08F 299/06 (2006.01) C08G 18/62 (2006.01) C08G 18/68 (2006.01) C08G 18/81 (2006.01)
Patent
CA 1253287
ABSTRACT A gel coat composition comprising 1) 50 to 90 weight percent of a polymeric material selected from a) a hydroxy functional urethane-extended un- saturated polyester free of isocyanate functionality and having a free hydroxyl to urethane mole ratio of from about 0.5 to 6; wherein said urethane-extended polyester is the reaction product of a non-aromatic hydroxylated unsaturated polyester, having a number average molecular weight of from about 500 to 2,000 derived by condensation polymerization of fumaric acid or a fumaric acid precursor with one or more non- aromatic glycol, one or more non-aromatic dicarboxylic acids, optionally one or more non-aromatic monocarboxylic acids, with a non-aromatic diisocyanate, polyisocyanate, or isocyanate functional prepolymer; and b) an acrylate backbone resin having multiple carbon-to-carbon bond unsaturation selected from one or more of the following: i) an epoxy functional acrylate or methacrylate polymer having multiple epoxide functionality attached to the polymer chain through an ester or ether linkage reacted with an unsaturated carboxylic acid selected from the group consisting of acrylic acid and methacrylic acid or mixtures thereof; or ii) hydroxy functional acrylate or methacrylate polymer having multiple hydroxyl group functionality reacted with a reactive organoisocyanate adapted for reaction with said hydroxyl groups to provide one or more urethane bonds per molecule and wherein said isocyanate has at least one carbon- to-carbon bond unsaturation per mole; and wherein said acrylate resin is substantially free of reactive epoxy and isocyanate functionality; and 2) 10 to 50 weight percent of a copolymerizable vinyl monomer.
507866
Glidden Company (the)
Hewitt Neville S.
LandOfFree
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