Phtalic anhydride based polyester-ether polyols and double metal cyanide catalyst system for preparing same

   
   

Disclosed are polyester-ether polyols and their use in urethane prepolymers, urethane foams and non-foam urethane coatings, adhesives, sealants and/or elastomers. Methods for producing such polyester-ether polyols using double metal cyanide catalysts are disclosed, along with methods for producing urethane prepolymers. The polyester-ether polyols of the instant invention are preferably the reaction product of phthalic anhydride, diethylene glycol, and propylene oxide. These polyester-ether polyols are useful as either the primary polyol in urethane compositions or in combination with conventional auxiliary polyester- and/or polyether-based polyols. The polyester-ether polyols impart greatly improved solubility and compatibility to mixtures of either polyether and/or polyester polyols. The polyester-ether polyols of the instant invention are desirably of lower viscosity than their precursor intermediate polyester polyols and are generally soluble in either polyester- and/or polyether-based polyols. Additionally, the polyester-ether polyols generally provide improved hydrolytic stability to CASE materials in which they are utilized.

São divulgados os polyols do poliéster-polyester-ether e seu uso em prepolymers do urethane, urethane espuma e revestimentos do urethane da non-espuma, adesivos, vedadores e/ou elastomers. Os métodos para produzir tais polyols do poliéster-polyester-ether que usam catalizadores dobro do cianido do metal são divulgados, junto com métodos para produzir prepolymers do urethane. Os polyols do poliéster-polyester-ether da invenção instantânea são preferivelmente o produto da reação do anhydride phthalic, glicol do diethylene, e óxido do propylene. Estes polyols do poliéster-polyester-ether são úteis como o polyol preliminar em composições do urethane ou em combinação com polyols auxiliares convencionais do poliéster e/ou polyether-baseado. Os polyols do poliéster-polyester-ether dão o solubility e a compatibilidade extremamente melhorados às misturas ou de polyols do polyether e/ou do poliéster. Os polyols do poliéster-polyester-ether da invenção instantânea são desejàvel de uma viscosidade mais baixa do que seus polyols intermediários do poliéster do precursor e são geralmente soluble ou nos polyols do poliéster e/ou polyether-baseado. Adicionalmente, os polyols do poliéster-polyester-ether fornecem geralmente a estabilidade hydrolytic melhorada aos materiais do CASO em que são utilizados.

 
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