Elastomers

Details Elastomers Elastomers

1991-01-23

1993-06-08

Michl, Paul R.

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

Synthetic resins

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

525316, 5253331, 523167, 524425, 524571, 524764, 5263402, C08C 1940

Patent

active

052180565

ABSTRACT:
A polyisoprene elastomer has a polyisoprene content with an average molecular weight in the range of 15,000 to 70,000 and preferably 25,000 to 50,000. This has been cross-linked with an unsaturated aromatic compound and cured with a sulfur or peroxide curing system. The elastomer has an extremely low compression set (0 to 5%) and an extremely low durometer (Shore A, 0 to 20). The elastomer is lightweight, soft, flexible and durable and its properties make its shock-absorbing and shock-attenuating characteristics unique. It is therefore highly suitable for insole and/or midsole components in footwear.

REFERENCES:
patent: 3957737 (1976-05-01), Pautrat et al.
patent: 3981943 (1976-09-01), Fujio et al.
patent: 4314920 (1982-02-01), Millen
patent: 4695609 (1987-09-01), Stevenson
patent: 4894425 (1990-01-01), Hellermann et al.
Pautrat, R. and Leveque, J., scientific article entitled "Preparation and Application of Natural Liquid Rubber," pp. 207-213, inclusive, of publication entitled Powdered, Liquid and Thermoplastic Natural Rubber, Proceedings of a Symposium sponsored by the United Nations Industrial Development Organization in association with The International Rubber Research and Development Board, May 14-15, 1981, Phuket, Thailand, published by Malaysian Rubber Research and Development Board.

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