C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 75/14 (2006.01) C08G 18/42 (2006.01) C08G 18/67 (2006.01) C08G 18/81 (2006.01) C09D 175/16 (2006.01)
Patent
CA 2065563
ABSTRACT OF THE DISCLOSURE A photocurable resin composition comprising (a) 10 to 90 parts by weight of a urethane acrylate resin which is obtainable by reacting a polyester in which an alicyclic dicarboxylic acid component accounts for 100 mole percent of the total acid component and an aliphatic diol having a side chain and/or alicyclic diol accounts for 60 to 100 mole percent of the total alcohol component while an aliphatic tri- or polyol accounts for 40 to 0 mole percent with (i) an aliphatic or alicyclic polyisocyanate and an active hydrogen compound containing a polymerizable unsaturated group or (ii) a monofunctional isocyanate compound containing a polymerizable unsaturated group within the molecule, (b) 90 to 10 parts by weight of a non-aromatic crosslinking agent having at least one (meth)acryloyl group within the molecule, and (c) an effective amount of a photosensitizer to initiate a photopolymerization reaction between (a) and (b). The composition has a remarkably high degree of weather resistance corres- ponding to a weather-o-meter time of not less than 4,000 hours.
Hida Keiji
Tomotsugu Akio
G. Ronald Bell & Associates
Nippon Paint Co. Ltd.
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