Multi-metal cyanide complex catalyst

Abstract

The invention relates to a polymetallic cyanide complex catalyst for ring opening polymerization of oxyalkylene, mainly aiming at resolving the problems existing in the prior technique that the activity of a catalyst is not enough and the catalyst needs relatively long induction period to acquire higher activity. In the invention, the technical proposal which better resolves the problems is as follows: the catalyst comprises one or a plurality of metallic cyanide complexes, a C4 to C10 organic alcohol with an tertiary alcohol structure and an organic ligand selected from aliphatic ester, aromatic monoester or aromatic diester and a mixture of the aromatic monoester and the aromatic diester. The catalyst has the advantages of no induction period and high activity, and is applied to the industrial preparation of unsaturated polyether polyols by the ring opening polymerization of the oxyalkylene.

Description

technical field

[0001] The invention relates to a multimetal cyanide complex catalyst, in particular to a multimetal cyanide complex catalyst with high activity and no induction period. Background technique

[0002] Polyether polyol is an important derivative of olefin oxide and one of the main raw materials for the synthesis of polyurethane (soft foam, hard foam, elastomer). With the wide application of polyurethane in electronics, electrical appliances, construction, automobiles, packaging, furniture, shoes, sealants, heat preservation, refrigeration and other fields, the amount of polyether polyols is increasing year by year. Catalysts for synthesizing polyether polyols are divided into cations (such as BF 3 ), anions (such as KOH) and coordination (such as Zn 3 [CoCN 6 ] 2 ) and other three types. Cationic catalyst (BF 3 ) catalyzes the ring-opening polymerization of oxidized olefins to produce many low-molecular-weight oligomers. In addition to the normal head-tai...