Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From heterocyclic reactant containing as ring atoms oxygen,...
Patent
1996-05-16
1997-06-10
Gorr, Rachel
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From heterocyclic reactant containing as ring atoms oxygen,...
568617, 568623, 568624, C08G 6500
Patent
active
056376731
ABSTRACT:
Improved double metal cyanide (DMC) catalysts are disclosed. The catalysts comprise a DMC compound, an organic complexing agent, and from about 5 to about 80 wt. % of a polyether polyol that has tertiary hydroxyl groups. Compared with other DMC catalysts, those of the invention have excellent activity for epoxide polymerization, and they can be used to make polyols having very low unsaturation even at high epoxide polymerization temperatures.
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J.L. Schuchardt et al., Preparation of High Molecular Weight Polyols Using Double Metal Cyanide Cataylsts Proceedings of the SPL, 32nd Annual Polyurethane Technical/Marketing Conference, Oct. 1989, pp. 360.
Arco Chemical Technology L.P.
Gorr Rachel
Schuchardt Jonathan L.
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