Diffusion resistant rubber liner and laminates formed therefrom

Details Diffusion resistant rubber liner and laminates formed therefrom Diffusion resistant rubber liner and laminates formed therefrom

1981-01-12

1982-07-13

Van Balen, William J.

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

428521, B32B 2504, B32B 2514, B32B 2516

Patent

active

043395066

ABSTRACT:
A rubber liner having resistance to fluid diffusion is disclosed. The rubber liner is compounded from natural or synthetic rubber in combination with a thiuram compound such that the blend upon curing has a durometer hardness no greater than about 75 on the Shore D. Scale. The rubber liner may be combined with a heat-resistant rubber layer to form a rubber laminate resistant to heat and fluid diffusion. The heat-resistant rubber layer may be composed of natural or synthetic rubber in combination with a salt of a benzimidazole which resists oxidation at elevated temperature over extended time periods with a retention or increase tensile strength. The rubber laminate may also have a metal-adhesive rubber layer to secure the laminate to metal substrates of industrial production tanks, vessels, pipes, and other containers where industrial processing continually exceeds 180.degree. F. The use of a rubber liner having diffusion resistant properties with a durometer hardness less than 75 on the Shore D Scale resists structural weaknesses developed upon continuous exposure to temperatures of about 180.degree. F.

REFERENCES:
patent: 2167716 (1939-08-01), Harkins
patent: 2522135 (1950-09-01), Schaffer
patent: 2522137 (1950-09-01), Schaffer
patent: 2522138 (1950-09-01), Schaffer
patent: 4115614 (1978-09-01), Martin, Jr.
patent: 4215178 (1980-07-01), Martin, Jr.

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