Double metal cyanide catalysts containing functionalized...

C - Chemistry – Metallurgy – 08 – G

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C08G 65/10 (2006.01) B01J 27/26 (2006.01) B01J 31/06 (2006.01) C08G 18/48 (2006.01) C08G 65/26 (2006.01)

Patent

CA 2259312

Double metal cyanide (DMC) catalysts useful for epoxide polymerizations are disclosed. The catalysts comprise a DMC compound, an organic complexing agent, and from about 2 to about 80 wt.% of a functionalized polymer or a water-soluble salt derived from the polymer. The catalysts are easy to prepare and isolate, are substantially non- crystalline, and have high activity for polymerizing epoxides. Polyols made from the catalysts have exceptionally low unsaturations, low viscosities, and reduced levels of high molecular weight polyol tail.

L'invention concerne des catalyseurs à cyanure bimétallique (DMC) utiles dans des polymérisations d'époxyde. Ces catalyseurs comprennent un composé DMC, un agent complexant organique, et d'environ 2 % en poids à 80 % en poids environ d'un polymère fonctionnalisé ou d'un sel soluble obtenu à partir du polymère. Ces catalyseurs sont faciles à préparer et à isoler, sensiblement non cristallins, et présentent une forte activité de polymérisation d'époxydes. Des polyols constitués à partir de ces catalyseurs présentent une insaturation et une viscosité exceptionnellement faibles, et des niveaux réduits de défaut de liaison de poyol à poids moléculaire élevé.

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