Depolymerized natural rubber and process for preparation thereof

Details Depolymerized natural rubber and process for preparation thereof Depolymerized natural rubber and process for preparation thereof

1995-09-12

1997-04-22

Michl, Paul R.

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

Synthetic resins

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

5245755, 5263402, 528490, C08J 309, C08C 100

Patent

active

056229984

ABSTRACT:
A depolymerized natural rubber having a number-average molecular weight of from 2,000 to 50,000 obtained by the depolymerization of a deproteinized natural rubber. A process for the preparation of a depolymerized natural rubber comprises dissolving a deproteinized natural rubber into an organic solvent so as to give a concentration of from 1 to 30% by weight and then carrying out air oxidation of the resulting solution in the presence of a metallic catalyst. The depolymerized natural rubber can provide the same physical properties as ordinary vulcanized rubbers, exhibits no odor or color characteristic to natural rubbers and causes no immediate allergy induced by protein.

REFERENCES:
patent: 2061276 (1936-11-01), Ingmanson
patent: 3313793 (1967-04-01), De LaMare
patent: 4549897 (1985-10-01), Seng et al.

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