Method for reducing the viscosity of high viscosity polyether po

Details Method for reducing the viscosity of high viscosity polyether po Method for reducing the viscosity of high viscosity polyether po

Filed on

1996-05-02

Date issued

1997-09-30

Examiner

Burn, Brian M.

Patent Class

Organic compounds -- part of the class 532-570 series

SubClass

Organic compounds

SubSubClass

Amino nitrogen containing

Other Related Categories

564474, C07C20916

Type

Patent

Status

active

Patent number

056727615

Description

ABSTRACT:
The viscosity of polyether polyols characterized by functionalities greater than or equal to 1, viscosities greater than 500 mPa.multidot.s at 25.degree. C. and at least 20% terminal secondary hydroxyl groups is reduced by converting at least one terminal hydroxyl group of the polyether to a leaving group and then reacting the conversion product with a primary amine or ammonia at a temperature of from about 70.degree. to 250.degree. C.

REFERENCES:
patent: 3654370 (1972-04-01), Yeakey
patent: 3666729 (1972-05-01), Grogler et al.
patent: 3691112 (1972-09-01), Grogler et al.
patent: 4902768 (1990-02-01), Gerkin et al.
patent: 5015774 (1991-05-01), Suekane et al.
patent: 5043472 (1991-08-01), Mafoti

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