Polyester and method for preparing such a polyester
Номер патента: MY181276A
Опубликовано: 21-12-2020
Автор(ы): Berkel Jesper Gabriël Van, Bing Wang, Edward E Paschke, Gerardus Johannes Maria Gruter, Jeffrey John Kolstad, Marion L Andrews, Matheus Adrianus Dam, Robert Joseph Schiavone
Принадлежит: Furanix Technologies BV
Опубликовано: 21-12-2020
Автор(ы): Berkel Jesper Gabriël Van, Bing Wang, Edward E Paschke, Gerardus Johannes Maria Gruter, Jeffrey John Kolstad, Marion L Andrews, Matheus Adrianus Dam, Robert Joseph Schiavone
Принадлежит: Furanix Technologies BV
Реферат: A polyester, comprising ethylene 2,5-furandicarboxylateunits, has an intrinsic viscosity of at least 0.45 d L/g and has a relative content of carboxylic acid end groups, expressed as the fraction of the molar amount of carboxylic acid end groups divided by the sum of the molar amounts of hydroxyl end groups and carboxylic acid end groups in the range of 0.10to 0.70. The polyester can be prepared with a method wherein a starting mixture comprising 2,5-furandicarboxylic acid and ethylene glycol is subjected to esterification and subsequent polycondensation at reduced pressure when the molar ratio of 2,5-furandicarboxylic acid to ethylene glycol in the starting mixture is 1:1.01 to 1:1.15, wherein water, that is formed during the reaction between 2,5-furandicarboxylic acid and ethylene glycol and some ethylene glycol are removed in a distillation system, and wherein ethylene glycol that is removed with water, is separated from water and at least partly recycled.
Thermal interface material and method and composition for preparing the same
Номер патента: US20230042712A1. Автор: Yung-Chi Tsai. Владелец: GTA MATERIAL Co Ltd. Дата публикации: 2023-02-09.