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:
Oct. 27, 2020
Filed:
Mar. 05, 2018
Mitsubishi Chemical Corporation, Chiyoda-ku, JP;
MITSUBISHI CHEMICAL CORPORATION, Chiyoda-ku, JP;
Abstract
There is provided a polyester resin including a 2,5-furandicarboxylic acid unit and a cyclohexanedimethanol unit in a main chain, in which the polyester resin is high in molecular weight, has heat resistance and hydrolysis resistance, and is excellent in mechanical properties and melt heat stability. There is also provided a method for producing a polyester resin having the above characteristics. A polyester resin including a 2,5-furandicarboxylic acid unit and a 1,4-cyclohexanedimethanol unit as main constituent components, wherein the following (I) and (II) are satisfied: (I) the reduced viscosity (ηsp/c) is 0.7 dL/g or more; and (II) the sum of a cyclovinylidene terminal and a methylcyclohexene terminal is 80 μeq/g or less.