Impact resistant laminate

Details Impact resistant laminate Impact resistant laminate

1985-02-20

1986-06-10

Robinson, Ellis P.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428412, 4284233, 4284244, 4284256, 428426, 428911, 428522, 89 3602, 109 80, 1563314, B32B 702, B32B 2740, B32B 1710

Patent

active

045942900

ABSTRACT:
An impact resistant transparent laminate that includes as one ply a special urethane-modified acrylic sheet containing a vinyl-functional polyurethane elastomer that is a polymerization product of an aliphatic diisocyanate, one or more hydroxyl-functional polyether or polyester prepolymers, and a hydroxyl or amine-functional vinyl monomer. In a three-ply embodiment of the invention, the urethane modified acrylic sheet serves as the back ply, a hard plastic sheet formed of a material like cast acrylic serves as the front ply, and a thin sheet having high elongation such as polyurethane serves as an intermediate ply. In a five-ply embodiment of the invention, the laminate further includes a second thin sheet having high elongation disposed immediately behind the urethane-modified acrylic ply and a ductile plastic sheet formed of a material like polycarbonate to serve as its back ply.

REFERENCES:
patent: Re29772 (1978-09-01), Niederhauser
patent: 3657057 (1972-04-01), Shorr
patent: 3700534 (1972-10-01), Cook
patent: 4312903 (1982-01-01), Molari
patent: 4322476 (1982-03-01), Molari
patent: 4328277 (1982-05-01), Molari

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