Process for producing pourable powdered rubber containing filler

Details Process for producing pourable powdered rubber containing filler Process for producing pourable powdered rubber containing filler

1988-04-05

1988-11-29

Lilling, Herbert J.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524434, 524435, 524436, 524437, 524442, 524548, 524552, 524556, 524565, 524571, 524573, 428402, C08L 2100, C08K 300, C08J 316, C08J 320

Patent

active

047882310

ABSTRACT:
A process for preparing a pourable powdered rubber containing filler, comprising preparing a blend by mixing a portion of said filler to be incorporated in said rubber product with 0.1 to 6.5 phr of a water-soluble salt of a Group IIa, IIb, IIIa or VIII metal of the Periodic Table and a rubber latex or aqueous emulsion of a rubber solution, adjusting the pH of the blend to a pH ranging from 3.2 to 8.6 by addition of an acid, adding the remaining amount of filler to the pH adjusted blend, separating the rubber containing filler from the aqueous phase of the blend, and drying the powdered rubber product obtained.

REFERENCES:
patent: 3399166 (1968-08-01), Burke
patent: 3846365 (1974-11-01), Berg et al.
patent: 3920604 (1975-11-01), Berg et al.
patent: 3922240 (1975-11-01), Berg et al.
patent: 3945978 (1976-03-01), Berg et al.
patent: 3998778 (1976-12-01), Berg et al.
patent: 4065426 (1977-12-01), Yamawaki et al.
patent: 4073755 (1978-02-01), Berg et al.
patent: 4138375 (1979-02-01), Berg et al.
patent: 4250082 (1981-02-01), Sommer et al.
patent: 4375497 (1983-03-01), Sandstrom

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