The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 1996
Filed:
Feb. 17, 1995
Yasuyuki Tanaka, Tokyo, JP;
Kazuhiko Shibata, Osaka, JP;
Kenichi Ikeda, Osaka, JP;
Yuji Nishida, Osaka, JP;
Masaharu Hayashi, Wakayama, JP;
Shinichi Nakade, Hyogo, JP;
Akihito Kuga, Tochigi, JP;
Eiji Kanamaru, Tochigi, JP;
Nitto Denko Corporation, Osaka, JP;
Kao Corporation, Tokyo, JP;
Sumitomo Rubber Industries, Ltd., Hyogo, JP;
Abstract
There are provided a deproteinized natural rubber latex which comprises a purified product of proteolytically treated natural rubber latex and contains fine particles of natural rubber latex, a deproteinized natural rubber which comprises a dehydrated product of the deproteinized natural rubber latex, and a process for the production of deproteinized natural rubber latex which comprises subjecting a latex solution prepared by (1) adding water and/or a surfactant to a natural rubber latex and then proteolytically treating the resulting latex solution or (2) proteolytically treating a natural rubber latex and then adding water and/or a surfactant to the treated natural rubber latex, to purification using a rotary plate membrane separation apparatus. The deproteinized natural rubber latex contains substantially no protein, is excellent in film-forming property, and provides a raw rubber film having excellent green strength, and the process can produce the deproteinized natural rubber latex in a high yield with high production efficiency.