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:
Dec. 04, 2012
Filed:
Nov. 16, 2006
Toshiaki Masuda, Yao, JP;
Ichiro Takahara, Yao, JP;
Kenichi Kitano, Yao, JP;
Katsushi Miki, Yao, JP;
Takeshi Inohara, Yao, JP;
Takeyoshi Fukuda, Yao, JP;
Takayuki Aoki, Yao, JP;
Satoshi Kawanami, Yao, JP;
Toshiaki Masuda, Yao, JP;
Ichiro Takahara, Yao, JP;
Kenichi Kitano, Yao, JP;
Katsushi Miki, Yao, JP;
Takeshi Inohara, Yao, JP;
Takeyoshi Fukuda, Yao, JP;
Takayuki Aoki, Yao, JP;
Satoshi Kawanami, Yao, JP;
Matsumoto Yushi-Seiyaku Co., Ltd., Yao-Shi, JP;
Abstract
Heat-expandable microspheres include a shell of thermoplastic resin and a blowing agent encapsulated therein having a boiling point not higher than the softening point of the thermoplastic resin, have a maximum expanding ratio not lower than 50 times, and are thermally expanded into hollow particulates having a repeated-compression durability not lower than 75 percent. The method of producing the heat-expandable microspheres includes the steps of dispersing an oily mixture containing a polymerizable component and the blowing agent in an aqueous dispersing medium containing a specific water-soluble compound and polymerizing the polymerizable component contained in the oily mixture.