Bi-component catalytic system for high-activity preparation of polyether polyol or polyether ester polyol, and application of bi-component catalytic system

Abstract

The invention relates to a bi-component catalytic system for high-activity preparation of polyether polyol or polyether ester polyol and application of the bi-component catalytic system. The catalyticsystem comprises a double-metal cyanide catalyst and a promoter, wherein a mass ratio of the activity promoter to the double-metal cyanide catalyst is (0.01-100): 1; and the promoter is one or more selected from quaternary ammonium salt, quaternary phosphonium salt, metal salt and Lewis base. By using the catalytic system, an epoxy compound can be efficiently catalyzed to be undergo ring-openinghomopolymerization or copolymerization with one or two selected from carbon dioxide and anhydride to prepare polyether ester polyol, and activity can reach 11 kg polymer / g DMC or above after a reaction is carried out for 6 h.

Description

technical field [0001] The invention belongs to the field of catalytic systems, in particular to a two-component catalytic system and its ability to catalyze ring-opening homopolymerization of epoxy compounds or copolymerization with one or both of carbon dioxide and acid anhydrides to efficiently prepare polyether polyols and polyether ester polyols. Alcohol application. Background technique [0002] Carbon dioxide is a major greenhouse gas. With the continuous advancement of industrialization, the emission of carbon dioxide has increased dramatically. At the same time, it is also the cheapest and most widely available non-toxic and renewable C1 resource, so how to efficiently use CO 2 become the focus of many researchers. Among them, the copolymerization of carbon dioxide and epoxy compounds into degradable aliphatic polycarbonate has good development prospects, and it has been applied to new polyurethane materials, biomedical materials, gas barrier materials, battery el...

AI Technical Summary

Problems solved by technology

[0005] In 2004, Qi Guorong's research group used DMC to catalyze the copolymerization of propylene oxide and phthalic anhydride to prepare alternately copolymerized polyesters. The catalytic activity reached 10kg polymer / g DMC, but the molecular weight of the obtained polyester was lower than 3000 (Journal of applied polymer science, 2004, 93, 1788-1792)

[0006] Although DMC catalysts have made great progress, there are still many problems in the preparation of polyether ester polyols by the copolymerization of PO and DMC: 1) The catalyst efficiency is below 4kg polymer / g DMC; 2) High selectivity and high activity cannot be taken into account ; 3) The molecular weight distribution is wide, and there is high molecular weight polymer tailing; 4) The reaction induction period is long

[0012] In summary, the introduction of different components in the process of DMC-catalyzed epoxy polymerization has a great impact on catalytic activity, reaction selectivity and molecular weight distribution, but the existing technology cannot achieve satisfactory results for all indicators at the same time

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