Article coated with fluoropolymer finish with improved durabilit

Details Article coated with fluoropolymer finish with improved durabilit Article coated with fluoropolymer finish with improved durabilit

1981-01-13

1982-09-28

Silverberg, Sam

Stock material or miscellaneous articles

Composite

Of polyisocyanurate

B32B 2700, B32B 2706

Patent

active

043518826

ABSTRACT:
Articles coated with multilayers of a composition of polytetrafluoroethylene plus a specified proportion of copolymers of perfluorinated polyvinyl ether and tetrafluoroethylene, to which is optionally added a heat stable polymer with a glass-transition temperature greater than or equal to 130.degree. C., are found to have improved durability. The proportion of the copolymer in each layer varies such that there is a maximum amount in the bottom layer with decreasing proportions in the other layer or layers.

REFERENCES:
patent: 3946136 (1976-03-01), Fitz
patent: 4128693 (1978-12-01), Ohami
patent: 4180609 (1979-12-01), Vassiliou
patent: 4252859 (1981-02-01), Concannon
U.S. Patent Application Serial No. 956,349 filed 10/31/78 by Concannon and Vary.

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