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:
May. 08, 2007
Filed:
Jul. 27, 2005
Chun-hsu Lin, Taipei, TW;
Jao-jou Tu, Guansi Township, Hsinchu County, TW;
Te-po Liou, Longtan Township, Taoyuan County, TW;
Shieh-jun Wang, Taipei, TW;
Chun-Hsu Lin, Taipei, TW;
Jao-Jou Tu, Guansi Township, Hsinchu County, TW;
Te-Po Liou, Longtan Township, Taoyuan County, TW;
Shieh-Jun Wang, Taipei, TW;
Yuan-Shin Materials Technology Corp., Taipei, TW;
Abstract
A method for transferring TCPX (α, α, α', α′-tetrachloro-p-xylene) into TFPX (α, α, α′, α′-tetrafluoro-p-xylene) is disclosed, which comprises the following steps: (a) providing a first reactant comprising TFPX; (b) mixing the first reactant with alkali metal fluorides, TCPX and phase transfer catalyst(s) to form a mixture, wherein the alkali metal fluorides is KF, CsF, NaF, LiF or the combination thereof, the phase transfer catalyst(s) is quaternary ammonium salt, quaternary phosphonium salt or the combination thereof; and (c) heating the mixture.