Activated starter mixtures and the processes related thereto

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 71/02 (2006.01) C08F 4/44 (2006.01) C08G 18/48 (2006.01) C08G 65/00 (2006.01) C08G 65/26 (2006.01) C08L 29/02 (2006.01)

Patent

CA 2434864

The present invention is directed to an activated starter mixture which can be used to prepare polyoxyalkylene polyols. The present invention is also directed to a process for preparing an activated starter mixture, particularly, to a process for preparing an activated starter mixture which is composed of a low molecular weight starter compound. The present. invention is also directed to a batch or semi-batch process for the polyaddition of an alkylene oxide on to an activated starter mixture, particularly, on to an activated starter mixture which is composed of a low molecular weight starter compound. The present invention provides an activated starter mixture, particularly, an activated starter mixture which is composed of a low molecular weight starter compound, which rapidly initiates polymerization. The present invention can eliminate the need to synthesize costly high molecular weight starter compounds by KOH catalysis in a separate, dedicated reactor.

La présente invention concerne un mélange de départ activé pouvant être utilisé pour préparer des polyols de polyoxyalkylène. Elle concerne également un procédé pour la préparation d'un mélange de départ activé, en particulier pour la préparation d'un mélange de départ activé composé d'un composé de départ de faible poids moléculaire. La présente invention a aussi trait à un procédé par lots ou par demi-lots pour la polyaddition d'un oxyde d'alkylène sur un mélange de départ activé, en particulier sur un mélange de départ activé composé d'un composé de départ de faible poids moléculaire, qui initie rapidement la polymérisation. La présente invention peut éliminer la nécessité de synthétiser à fort prix des composés de départ de poids moléculaire élevé par catalyse au KOH dans un réacteur distinct réservé à cet usage.

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