PRODUCT-TO-PRODUCT PROCESS FOR PREPARATION OF LOW VISCOSITY POLYOXYALKYLENE POLYOLS

• Main Authors: RIES JEFFREY R, Y. YOUNG, BROWNE EDWARD P, PAZOS JOSE F
• Format: Patent
• Language: Chinese; English
• Published: 21.09.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

This invention relates to a process for preparing low viscosity polyoxyalkylene polyols (P) that have a narrow molecular weight distribution. This process comprises reacting a H-functional starter substance (Si), a H-functional starter substance (Sx) and a H-functional starter substance (Sc) with one or more alkylene oxides in the presence of a double metal cyanide catalyst. The resultant polyoxyalkylene polyols (P) have a functionality of 2 to 8 and a hydroxyl number of 5 to 35 mg KOH/g polyol. 本发明涉及用于制备低粘度聚氧化烯多元醇（P）的方法，所述聚氧化烯多元醇（P）具有窄分子量分布。该方法包括使H官能起始物物质（Si）、H官能起始物物质（Sx）和H官能起始物物质（Sc）与一种或多种烯化氧在双金属氰化物催化剂的存在下反应。所得聚氧化烯多元醇（P）具有2至8的官能度和5至35 mg KOH/g多元醇的羟基值。