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Method of preparing low allergic natural rubber latex and deproteinized natural rubber latex, and low allergic natural rubber and deproteinized natural rubber
Method of preparing low allergic natural rubber latex and deproteinized natural rubber latex, and low allergic natural rubber and deproteinized natural rubber
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机译:低过敏性天然橡胶和脱蛋白天然橡胶胶乳的制备方法,低过敏性天然橡胶和脱蛋白天然橡胶
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摘要
A method of preparing a low allergic natural rubber latex which is less likely to cause allergy, 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 its decomposition products, which have a number-average molecular weight of 4500 or more, are not detectable; 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 further to decompose the protein and decomposition products thereof in the latex, and removing the protein and the decomposition products thereof; a low allergic natural rubber obtained by a decomposition treatment of a protein, wherein the protein and its protein decomposition products, which have a number-average molecular weight of 4500 or more, are not detectable; and a deproteinized natural rubber obtained by decomposition and removal treatment of a protein, wherein the content of the protein is 0.02% or less in terms of nitrogen content, an absorption at 3280 cm-1 is not recognizable in an infrared absorption spectrum, and the protein and a protein decomposition product, which have a number-average molecular weight of 4500 or more, are not detectable. IMAGE
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