Chinese Academy of Sciences

Yusheng Qin

Xianhong Wang

Fosong Wang

Wei Wu

Shunjie Liu

Lijun Qiao

Shuangbin Fu

This invention provides a production method of a poly(carbonate-ether)polyol, comprising the steps of: performing a reaction between a carboxylic acid and an epoxide to obtain an intermediate, wherein the carboxylic acid has an acidity constant of 0.2 to 4; and performing a polymerization reaction between the intermediate and carbon dioxide under the action of a rare earth doped double metal cyanide of Zn[Co(CN)]to obtain a poly(carbonate-ether)polyol. In the production method of the poly(carbonate-ether)polyol provided by this invention, a carboxylic acid having a suitable acidity constant is used as an initiator and an epoxide is firstly activated by using the carboxylic acid, and polyethers having different molecular weights generated in situ after activation are used as chain transfer agents to be involved in the polymerization reaction between carbon dioxide and the epoxide under the action of a rare earth doped double metal cyanide Zn[Co(CN)]. This production method of the poly(carbonate-ether)polyol has a shorter reaction time, and the content of a byproduct propylene carbonate in the product is relatively low.

Production method of poly(carbonate-ether)polyol

The present invention provides a metalporphyrin complex having structure represented by formula (I), wherein R, R, R, R, R, R, R, R, Rand Rare independently selected from one of hydrogen, halogen, aliphatic group, substituted heteroaliphatic group, aryl and substituted heteroaryl; n is 1-6; L is quaternary ammonium functional group or quaternary phosphonium functional group; M is a metal element; and X is one of halogen, &#x2014;NO, BF&#x2014;, &#x2014;CN, p-methyl benzoate, o-nitrophenol oxygen anion, 2,4-dinitrophenol oxygen anion, 2,4,6-trinitrophenol oxygen anion, 3,5-dichlorophenol oxygen anion and pentafluorophenol oxygen anion. The metalporphyrin complex provided in the present invention has two quaternary ammonium functional groups or two quaternary phosphonium functional groups, and compared with the prior art, the metalporphyrin complex shows higher catalytic activity in catalyzing polymerization reaction of carbon dioxide and an epoxide.

Metalporphyrin complex, preparation method therefor and method for preparing polycarbonate

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Changchun, China

Yusheng Qin