Polymerization of alkylene oxides using aluminum compounds and cyclic amidines

• Main Authors: YONKEY MATTHEW M, CUMMINS CLARK H, KANDIA SAMEER VIJAYKUMAR BHASKAR, BEDARD ANNE-CLAIRE, ROSEN MARI S, KEATON RICHARD J, BABB DAVID A, BELOWICH MATTHEW E
• Format: Patent
• Language: Chinese; English
• Published: 02.09.2022
• 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

The present invention provides a polyether prepared by polymerizing an alkylene oxide in the presence of a starter, an aluminum compound having at least one hydrocarbyl substituent, and a cyclic amidine. The molar ratio of the amount of phosphorus-nitrogen base present to the amount of starter is very small. Compared with the condition of singly using the aluminum compound, the existence of a small amount of cyclic amidine greatly improves the catalytic activity of the system. The product polyethers have small amounts of unsaturated polyether impurities and little or no unwanted high molecular weight moieties. The proportion of primary hydroxyl groups of the propylene oxide polymer is very low. 本发明提供了一种通过在起始剂、具有至少一个烃基取代基的铝化合物以及环脒的存在下使环氧烷聚合而制备的聚醚。所存在的磷-氮碱的量与起始剂的量的摩尔比很小。与单独使用该铝化合物的情况相比，此类少量环脒的存在极大地提高了该体系的催化活性。该产物聚醚具有少量的不饱和聚醚杂质，并且很少有或没有不需要的高分子量部分。环氧丙烷聚合物的伯羟基的比例很低。