Title: Method for treatment of natural rubber field latex
Application Number: 86106292 Application Date: 1986.08.20
Publication Number: 1009517 Publication Date: 1987.03.18
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C08C1/04;C08C19/06
Applicant(s) Name: Board of the Rubber Research Inst. of Malaysia Address:
Inventor(s) Name: Chen Seong-Fong
Attorney & Agent: YANG GANG
Abstract:
    A method for the treatment of fresh natural rubber field latex comprises incubating the field latex with a proteolytic enzyme at a pH suitable for the enzyme. The amount of enzyme present and the incubation conditions are such that the enzyme-treated field latex, when subsequently processed into epoxidised natural rubber latex, has improved coagulation and crepeing properties. A method for the preparation of epoxidised natural rubber from fresh natural rubber field latex is also described. This comprises 1) incubating the field latex with a proteolytic enzyme at a pH suitable for the enzyme, 2) epoxidising the enzyme-treated field latex to the desired mole % level of epoxidation, 3) coagulating the epoxidised natural rubber latex, and 4) crepeing, washing, crumbling and drying the epoxidised natural rubber.
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