Haze-free transparent laminate having a plasticized polyvinyl ac

Details Haze-free transparent laminate having a plasticized polyvinyl ac Haze-free transparent laminate having a plasticized polyvinyl ac

1977-07-25

1978-10-17

Ives, P. C.

Stock material or miscellaneous articles

Composite

Of polycarbonate

428414, 428415, 428424, 428409, 156106, 156306, B32B 2736

Patent

active

041210140

ABSTRACT:
A method for overcoming laminate failure in laminated windows containing adjacent layers of polycarbonate and plasticized polyvinyl acetal is disclosed. The method involves applying a protective adhesive means such as a film of a polyurethane or an epoxy resin to a major surface of at least one of the sheets, assembling the sheets with said film on an interfacial surface of the assembly, and laminating the assembly at high temperature and pressure. Also disclosed are various laminate configurations containing a plasticized polyvinyl acetal-polycarbonate interfacial surface treated according to the present invention. Such laminates are useful as substantially haze-free, transparent articles, such as windows for aircraft.

REFERENCES:
patent: 3591406 (1971-07-01), Moynihan
patent: 3671370 (1972-06-01), Littell, Jr.
patent: 3841955 (1974-10-01), Coaker et al.
patent: 4035549 (1977-07-01), Kennar
Lexan, GE Tech. Report CDC-502, pp. 3-11.

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