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:
Aug. 09, 2011
Filed:
Feb. 06, 2008
Katsushi Miki, Yao, JP;
Toshiaki Masuda, Yao, JP;
Ichiro Takahara, Yao, JP;
Takashi Fujie, Yao, JP;
Ikuo Yosejima, Yao, JP;
Katsushi Miki, Yao, JP;
Toshiaki Masuda, Yao, JP;
Ichiro Takahara, Yao, JP;
Takashi Fujie, Yao, JP;
Ikuo Yosejima, Yao, JP;
Matsumoto Yushi-Seiyaku Co., Ltd., Yao-shi, JP;
Abstract
The present invention provides a process for producing thermo-expansive microspheres comprising a thermoplastic resinous shell and a blowing agent being encapsulated in the shell, the blowing agent which is a fluorine-containing Ccompound having ether linkage, being free of chlorine and bromine atoms and gasifying at a temperature not higher than the softening point of the thermoplastic resin. The thermo-expansive microspheres have preferably an average particle size ranging from 1 to 100 μm and a CV, or coefficient of variation, of particle size distribution being 30% or less, and a retaining ratio of blowing agent encapsulated being 90% or more.