Process for regenerating cross-linked, vulcanized flourine rubbe

Details Process for regenerating cross-linked, vulcanized flourine rubbe Process for regenerating cross-linked, vulcanized flourine rubbe

1996-07-17

1998-06-23

Dean, Karen A.

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

Synthetic resins

Process of treating scrap or waste product containing solid...

521 46, C08J 1104

Patent

active

057706336

ABSTRACT:
Filler-containing, cross-linked, vulcanized fluorine rubber waste is regenerated by treatment with at least one of CH.sub.3 SO.sub.3 H, ClSO.sub.3 H, CF.sub.3 SO.sub.3 H and fuming sulfuric acid, followed by dissoluting into a solvent and separating solvent-insoluble filler therefrom, whereby revulcanizable fluorine rubber is recovered from the fluorine rubber waste, almost irrespective of types of cross-linking systems used for formation of cross-linked, vulcanized fluorine rubber.

REFERENCES:
patent: 3291761 (1966-12-01), Griffin
patent: 3793235 (1974-02-01), Goebel
patent: 3972842 (1976-08-01), Markham
Kautschuk + Gummel--Kunststoffe 23. Jahrgang, Heft 3/ 1976, p. 218.
Recycling--Special Elastomers Flourine Rubbers, Pu Elastomers, Kautschuk and Gummel Kunststoppe 45, Jahrgang, Nr 9/92, pp. 742-746.
Proiz-vo Shi, Rezinotekhn, Asbestotekhn Izdii, (Moskva) 1979 vol. 6, p. 7.

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