Process of oxyalkylation employing solid, heterogeneous oxyalkyl

Details Process of oxyalkylation employing solid, heterogeneous oxyalkyl Process of oxyalkylation employing solid, heterogeneous oxyalkyl

1997-06-20

1998-06-30

Shah, Mukund J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

568608, 568609, 568618, 568619, C08G 6528

Patent

active

057735255

ABSTRACT:
Oligomeric polyoxyalkylene polyethers are prepared by oxyalkylating a low molecular weight hydroxyl-functional starter molecule with one or more alkylene oxides in the presence of a solid, heterogeneous magnesium oxide catalyst. The catalyst is readily and rapidly removed by simple filtration to yield a polyether with minimal metal ion content suitable for use directly or as a starter molecule for further double metal cyanide complex catalyzed oxyalkylation.

REFERENCES:
patent: 5012012 (1991-04-01), Nakamura et al.
patent: 5136106 (1992-08-01), King
patent: 5417808 (1995-05-01), Okamoto et al.
patent: 5679764 (1997-10-01), Pazos
Derwent accession No. 91-364199/50 for Japanese Patent No. 3-242241, Lion Corp., Oct. 1991.
Derwent accession No. 94-174017/21 for Japanese Patent No. 61-16587, Lion Corp., Apr. 1994.

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