Composition and method of making polymer seals

Details Composition and method of making polymer seals Composition and method of making polymer seals

1988-01-25

1989-08-15

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

4284233, B32B 702

Patent

active

048573892

ABSTRACT:
A polymer seal and method of making same consisting of a combination of pre-polymers cured and bonded together to form a single multi-layered seal of varying hardness with at least one pre-polymer being a polyester-based pre-polymer and at least one pre-polymer being a polyether-based pre-polymer. The different pre-polymers, upon curing, yield 80 to 90 shore A and 80 to 90 shore D hardness urethanes respectively.

REFERENCES:
patent: 4182898 (1980-01-01), Fujiwara
patent: 4410478 (1963-10-01), Lindemayer et al.
patent: 4443518 (1984-04-01), Martins et al.
patent: 4567088 (1986-01-01), Skogman et al.
patent: 4731289 (1988-03-01), Coleman

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