Method for producing polyester polyol, method for producing modified polyester, polyester polyol and modified polyester

• Main Authors: ARIMA, MASAO, OKAMOTO, DAICHI
• Format: Patent
• Language: Chinese; English
• Published: 16.06.2014
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

Provided is a method by which a polyester polyol can be produced by depolymerizing a starting material polyester within a short time without using a tin-based metal catalyst. The method for producing the polyester polyol is characterized by comprising a step wherein a starting material polyester is depolymerized by heating a mixture that contains, as essential ingredients, the starting material polyester, a polyol component, and a non-tin-based metal catalyst or a non-metal basic catalyst. It is preferable that the non-tin-based metal catalyst is a compound that is selected from the group consisting of zinc compounds, manganese compounds, lithium compounds and calcium compounds.