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:
Feb. 16, 2010
Filed:
Nov. 09, 2006
Applicants:
Kuen Yuan Hwang, Hsinchu, TW;
An Pang Tu, Hsinchu, TW;
Chun Hsiung Kao, Hsinchu, TW;
Fang Shian Su, Hsinchu, TW;
Inventors:
Kuen Yuan Hwang, Hsinchu, TW;
An Pang Tu, Hsinchu, TW;
Chun Hsiung Kao, Hsinchu, TW;
Fang Shian Su, Hsinchu, TW;
Assignee:
Chang Chun Plastics Co., Ltd., Taipei, TW;
Primary Examiner:
Int. Cl.
CPC ...
C08G 8/20 (2006.01); C08L 63/00 (2006.01); C08L 63/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A phenolic resin having not more thanwt% of free bisphenol and a molecular weight distribution Mw/Mn of not more thanis prepared by reacting a bisphenol and aldehyde in the presence of an alkaline catalyst at a temperature of from° C. to° C., neutralizing with an acid, adding an acid to adjust the pH to fromto, heating to a temperature of from° C. to° C, and vacuuming to recover the phenolic resin.