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. 03, 2017
Filed:
Dec. 16, 2014
Sumitomo Rubber Industries, Ltd., Kobe-shi, Hyogo, JP;
Tohoku University, Sendai-shi, Miyagi, JP;
Haruhiko Yamaguchi, Kobe, JP;
Yukino Inoue, Kobe, JP;
Seiji Takahashi, Sendai, JP;
Toru Nakayama, Sendai, JP;
Satoshi Yamashita, Sendai, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-Shi, Hyogo, JP;
TOHOKU UNIVERSITY, Sendai-Shi, Miyagi, JP;
Abstract
The present invention provides an effective method for fractionating rubber particles in natural rubber latex by particle size, and effective methods for transporting or preserving rubber particles. The present invention relates to a method for fractionating rubber particles in natural rubber latex by particle size, the method including centrifuging natural rubber latex in at least four stages at forces of 800 to 3,000×g, 6,500 to 10,000×g, 17,000 to 22,000×g, and 40,000 to 60,000×g to fractionate rubber particles. The present invention also relates to methods for transporting or preserving rubber particles, the methods including the steps of adding a buffer solution and an antioxidant to natural rubber latex or rubber particles fractionated from natural rubber latex; and freezing a mixture prepared in the above step.