Co-curing of NR/EPDM rubber blends

Details Co-curing of NR/EPDM rubber blends Co-curing of NR/EPDM rubber blends

1989-11-16

1990-06-05

Seccuro, Carman J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525211, 525237, 525345, 524490, 524232, C08L 700, C08L 2316, C08L 2320

Patent

active

049315080

ABSTRACT:
NR/EPDM co-cured rubber blends with sulfur and organic peroxide used together as the co-curing agents to achieve ozone resistant, high tensile property rubber compositions. Sulfur accelerators MBTS and DPG are also employed in the curing process. NR/EPDM blends of from 70/30 to 55/45 are cured in an air cure process with sulfur in the range of 0.64-1.6 phr and with organic peroxide in the range of 0.6-1.6 phr.

REFERENCES:
patent: 2909584 (1959-10-01), Parks
patent: 3419639 (1968-12-01), Gentile
patent: 3658732 (1972-04-01), Ballini et al.
patent: 3817952 (1974-06-01), Knabeschuk
patent: 3821134 (1974-06-01), Son et al.
patent: 3830881 (1974-08-01), Woods et al.
patent: 4051083 (1977-09-01), Newman
"Peroxide Cross-Linking . . . ", Van Drumpt, Rubber World 3/88, pp. 33-41.
"Co-Vulcanization in NR/EDPM Blends" Tobing Rubber World--2/88--pp. 33-37.

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