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:
Jun. 29, 2010
Filed:
Feb. 02, 2006
Kimio Nakayama, Chiba, JP;
Tatsuya Shoji, Chiba, JP;
Yukihiko Asano, Chiba, JP;
Shigeru Yao, Chiba, JP;
Kimio Nakayama, Chiba, JP;
Tatsuya Shoji, Chiba, JP;
Yukihiko Asano, Chiba, JP;
Shigeru Yao, Chiba, JP;
Ube Industries, Ltd., Ubi-shi, Yamaguchi, JP;
Abstract
Porous spherical particles of polyamide 11 or polyamide 12 can be produced by an industrially advantageous process which comprises the steps of mixing a polyamide solution of polyamide 11 or polyamide 12 dissolved in a phenol compound and a low molecular weight aliphatic alcohol which is a poor solvent for the polyamides but is well compatible with the phenol compound in the presence of a high molecular weight alkylene glycol to prepare a mixture solution having an initial viscosity of 10 mPa·s or more, and allowing the mixture solution to stand, to precipitate polyamide particles.