Processes for preparing a polu00edester polyol and a polyol to prepare polyurethane, polyester, thermoplastic poliuteran, uses of a polyester polyol and a thermoplastic polyurethane, and article

摘要

Processes for preparing a polyester polyol and polyester polyol to prepare a poliuteran,, uses a poliuteran thermoplastic, polyester polyol and a poliuteran thermoplastic, and article.The invention relates to a method for the production of a polyester polyol, which comprrende the following steps of the method: (a) to produce a mixture of reaction, which comprises the following components:: at least a carboxylic acid obtained from natural raw materials, and by the At least two acid groups, B: at least a multivalent alcohol, C: at least one composed of organic fosfita,D: at least a Lewis acid; (b) heating the mixture of the reaction at a temperature of at least 160 u00ba C, and separate the water, which is generated during the reaction; and (c) heating the mixture of the reaction at a temperature of at least 210u00bac, in a low pressure of 1013 mbar, during a period of 0,1 25 Hours.