Title:
【発明の名称】ポリエステルを形成するためのジカルボン酸及びジカルボン酸のジアルキルエステルの共重合
Document Type and Number:
Japanese Patent JP3300356
Kind Code:
B2
Abstract:
The present invention relates to a process for copolymerizing a dicarboxylic acid, a dialkyl ester, and a diol in the presence of a transesterification catalyst. The process involves heating a mixture containing carboxylic acids and esters in excess diol at elevated temperatures in the presence of a transesterification catalyst and returning any vaporized diol to the reaction vessel until the theoretical amount of alcohol and/or water have been evolved. The alcohol and/or water of reaction is not allowed to return to the vessel. When the theoretical weight of alcohol and/or water is collected, the excess diol is removed and the polymerization is allowed to proceed.
Inventors:
Sumner, Charles Edwan, Junior
Boone, Gary Darrell
Boone, Gary Darrell
Application Number:
JP52112294A
Publication Date:
July 08, 2002
Filing Date:
March 14, 1994
Export Citation:
Assignee:
Eastman Chemical Company
International Classes:
C08G63/16; C08G63/78; C08G63/80; (IPC1-7): C08G63/78
Other References:
【文献】米国特許3836574(US,A)
Attorney, Agent or Firm:
Takashi Ishida (1 person outside)