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. 06, 2007
Filed:
Jul. 27, 2005
Chan-yuan Ho, Hsinchu, TW;
Tsair-feng Lin, Bade, TW;
Chun-hsu Lin, Taipei, TW;
Shieh-jun Wang, Taipei, TW;
Chan-Yuan Ho, Hsinchu, TW;
Tsair-Feng Lin, Bade, TW;
Chun-Hsu Lin, Taipei, TW;
Shieh-Jun Wang, Taipei, TW;
Yuan-Shin Materials Technology Corp., Taipei, TW;
Abstract
A method for the synthesis of TFPX (α, α, α', α′-tetrafluoro-p-xylene) is disclosed, which comprises the following steps: (a) providing a sulpholane solution comprising TCPX (α, α, α′, α′-tetrachloro-p-xylene); (b) mixing the sulpholane solution with alkali metal fluoride, and phase transfer catalyst to form a mixture, wherein the phase transfer catalyst is quaternary phosphonium salt; and (c) heating the mixture.