Process for the preparation of polyether polyols with a reduced

Details Process for the preparation of polyether polyols with a reduced Process for the preparation of polyether polyols with a reduced

Filed on

1993-12-27

Date issued

1994-12-20

Examiner

Welsh, Maurice J.

Patent Class

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

SubClass

Synthetic resins

SubSubClass

From reactant having at least one -n=c=x group as well as...

Other Related Categories

564505, 568617, 568619, 568620, C08G 1832

Type

Patent

Status

active

Patent number

053747054

Description

ABSTRACT:
Polyether polyols are by reacting an alkylene oxide comprising propylene oxide with an initiator containing at least three active hydrogen atoms per molecule. The reaction is conducted in the presence of an alkoxylation catalyst which is barium, strontium and their oxides, hydroxides, hydrated hydroxides or monohydroxide salts, or mixtures thereof; and in the presence of from about 1 to about 10 weight percent, based on total weight of initiator, of a processing aid that is an organic monohydroxyl- or dihydroxyl-containing substance having a molecular weight of at least 30, or a mixture thereof. The processing aid enhances the ability to obtain polyether polyols having a reduced unsaturation content.

REFERENCES:
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patent: 4302613 (1981-10-01), Yang et al.
patent: 4306093 (1981-01-01), Yang et al.
patent: 4376868 (1983-11-01), Nield et al.
patent: 4453022 (1984-08-01), McCain et al.
patent: 4453023 (1984-05-01), McCain et al.
patent: 5010187 (1991-01-01), Heuvelsland
patent: 5070125 (1991-01-01), Heuvelsland
patent: 5114619 (1992-03-01), Heuvelsland
patent: 5162589 (1992-07-01), Wijngaarden et al.
patent: 5220077 (1993-06-01), Sandoval et al.

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