Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...
Patent
1995-03-06
1997-07-15
Nakarani, D. S.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including components having same physical characteristic in...
428213, 428214, 428412, 4284242, 4284244, 428515, 428520, B32B 702, B32B 2730, B32B 2740
Patent
active
056481497
ABSTRACT:
The purpose of the present invention is to provide novel primer compositions for use in bonding a thermoset polyurethane film to the surface of a polymeric substrate. The novel primer composition of the invention is an elastomeric polymer, particularly polyvinylpyrrolidinone, or a copolymer comprising vinylpyrrolidinone and alkyl acrylate or alkyl methacrylate. The construction of the article of the present invention comprises a transparent polymeric substrate, such as stretched acrylic, a primer layer of polyvinylpyrrolidinone or copolymer of vinylpyrrolidinone and alkyl acrylate or alkyl methacrylate on a surface thereof, and a film of thermoset polyurethane on the primer layer. The polyurethane is preferably a reaction product of isocyanate and a polyol such as polycaprolactone polyol, hexanediol carbonate polyol, cyclohexanedimethanol carbonate polyol, phthalate ester polyol, and hexanediol/cyclohexanedimethanol carbonate polyol. The effect of the primer composition of the present invention is to provide adequate adhesion of the thermoset polyurethane film to the polymeric substrate, such as stretched acrylic. The resulting article is particularly useful as an aircraft cabin window.
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Chemical Abstracts, vol. 91, No. 20, 12 Nov. 1979, Abstract No. 159152b, p. 78.
Rukavina Thomas G.
Slobodnik John B.
Harmuth Raymond J.
Lepiane Donald C.
Nakarani D. S.
PPG Industries Inc.
Seidel Donna L.
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