Rubber composition containing powdered leather and molding produ

Details Rubber composition containing powdered leather and molding produ Rubber composition containing powdered leather and molding produ

1991-10-11

1993-12-21

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

8 9418, 8 9421, C08L 8906, C14C 100

Patent

active

052721906

ABSTRACT:
A rubber composition containing a powdered leather of a dispersion mixture comprising from 10 to 400 parts by weight of a powdered leather with a skin component of greater than 75% by weight, a total amount of Na.sup.+ ions and Ca.sup.2+ ions extractable with water of less than 0.5% by weight and an average grain size D.sub.50 of from 10 .mu.m to 250 .mu.m, and 100 parts by weight of rubber obtained from a raw material for the powdered leather by performing coarse pulverization, water washing, dewatering, steams swelling, drying and powderization and then separation into particles of a desired average grain size depending on the purpose of use, as well as a molding product obtained from the rubber composition.

REFERENCES:
patent: 290909 (1883-12-01), Mitchell
patent: 894334 (1908-07-01), Lewis
patent: 4834762 (1989-05-01), Nishibori
World Patents Index Latest--Abstract for Appln. No. 91-249210 (Japanese Pat. No. 3 162 500, issued Jul. 12, 1991).

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