Means for mechanically stabilizing deproteinized natural rubber latex
AssigneesKao Corporation, Sumitomo Rubber Industries, Ltd.
InventorsYasuyuki Tanaka, Yuichi Hioki, Masaharu Hayashi, Naoya Ichikawa, Toshiaki Sakaki
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Abstract
A means for stabilizing a deproteinized natural rubber latex is disclosed, comprising adding a stabilizer selected from the group consisting of (a) an anionic surfactant, (b) an amphoteric surfactant, (c) a nonionic surfactant, (d) a nonionic or amphoteric oligomer or polymer, and (e) an anionic oligomer or polymer. By adding the stabilizer, the mechanical stability of a deproteinized natural rubber latex can be markedly improved.
Claims5
A method for improving mechanical stability of a deproteinized natural rubber latex, which comprises the step of adding to the deproteinized natural rubber latex a stabilizer selected from the group consisting of
- an alkylbenzene sulfonate and a polyoxyalkylene alkylsulfuric acid ester salt,
- wherein the stabilizer is employed in an amount to give a concentration of from 0.01 to 10% by weight based on the total weight of the deproteinized natural rubber latex.
A rubber latex composition comprising a deproteinized natural rubber latex and a stabilizer, wherein the stabilizer is selected from the group consisting of
- an alkylbenzene sulfonate and a polyoxyalkylene alkylsulfuric acid ester salt,
- wherein the stabilizer is employed in an amount to give a concentration of from 0.01 to 10% by weight based on the total weight of the deproteinized natural rubber latex.
A method for preparing a deproteinized natural rubber latex, which comprises the steps of:
- (1) treating a natural rubber latex with a protease and a first surfactant,
- (2) removing a hydrolized protein and the first surfactant from the treated natural rubber latex, and
- (3) adding to the deproteinized natural rubber latex to improve the mechanical stability of the deproteinized natural rubber latex a stabilizer selected from the group consisting of a second surfactant, an oligomer and a polymer,
- wherein the stabilizer can be anionic, amphoteric, or nonionic, and is employed in an amount to give a concentration of from 0.01 to 10% by weight based on the total weight of deproteinized natural rubber latex.
Dependencies are inferred from the claim text.