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. 28, 2006
Filed:
Sep. 14, 2004
Shinji Ohtomo, Tsukuba, JP;
Satoshi Okamoto, Tsukuba, JP;
Akiko Nakazono, Tsukuba, JP;
Hideyuki Ikehira, Mukou, JP;
Shinji Ohtomo, Tsukuba, JP;
Satoshi Okamoto, Tsukuba, JP;
Akiko Nakazono, Tsukuba, JP;
Hideyuki Ikehira, Mukou, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
A liquid-crystalline polyester production method with a shortened reaction time and improved productivity per unit time by using an organic basic compound containing one nitrogen atom in a molecule is achieved by a liquid-crystalline polyester production method comprising carrying out acylation reaction and/or ester-exchange in the presence of an organic basic compound containing one nitrogen atom in one molecule and satisfying the following inequality (1):0<0.4×  (1)wherein, A and B satisfy A={(Ec−Ec)/(Ep−Ep)}−1 and B=(φf/φfp)−1; Ec denotes the heat of formation of the organic basic compound; Ecdenotes the heat of formation of a compound coordinated by proton; Ep denotes the heat of formation of pyridine; and Epdenotes the heat of formation of pyridine coordinated by proton to the nitrogen atom; φf and φfp independently denote parameters relevant to the steric angles.