Title: Method of preparing low sensitivity natural rubber latex and deproteinized natural rubber latex and low sensitivity natural rubber and deproteinized natural rubber
Application Number: 01136887 Application Date: 2001.11.06
Publication Number: 1353116 Publication Date: 2002.06.12
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C08C1/04
Applicant(s) Name: Sumitomo Rubber Industries, Ltd. Address:
Inventor(s) Name: Ichikawa Naoya;Miyamoto Yoshiake;Hayashi Shoji
Attorney & Agent: hu jiaoyu
Abstract:
    A method of preparing a low allergic natural rubber latex, comprising adding a protease having an exopeptidase activity to a natural rubber latex and aging the natural rubber latex, thereby to decompose a protein in the latex to such a degree that the protein and a protein decomposition product, which have a number-average molecular weight of 4500 or more, are not detected; a method of preparing a deproteinized natural rubber latex which is less likely to cause allergy, comprising adding an alkali protease to a natural rubber latex, thereby to decompose a protein in the latex, adding a protease having an exopeptidase activity, thereby to further decompose the protein and a decomposition product thereof in the latex, and removing the protein and the decomposition product thereof; a low allergic natural rubber obtained by a decomposition treatment of a protein, wherein the protein and a protein decomposition product, which have a number-average molecular weight of 4500 or more, are not detected; and a deproteinized natural rubber obtained by a decomposition treatment and a removing treatment of a protein.
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