Patent · US Expired

Method for the preparation of methyl ethers of polyether polyols employing dimethylsulfate as a methylating agent

US4994626A · kind A · utility

7Cited by

1References

5Claims

0Family size

Assignee

BASF SE

Inventors

Ronald E. Greenough · Lincoln Park, US
Jay G. Otten · Woodhaven, US
Stefan Birnbach · Ludwigshafen, DE
Jochen Houben · Kempen, DE

Key dates

Filing date	Nov 8, 1989
Grant date	Feb 19, 1991
Priority date	—
Expiry date	Nov 8, 2009

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C41/16
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for preparing an etherified polyoxyalkylene derivative of the formula ##STR1## wherein R.sup.1 and R.sup.4 are identical or different and are each independently C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.5 alkenyl, C.sub.6 -C.sub.20 aryl, C.sub.6 -C.sub.20 alkyl aryl, C.sub.6 -C.sub.20 cycloalkyl, and mixtures thereof, R.sup.2 and R.sup.3 are identical or different and independent of each other are H, CH.sub.3, CH.sub.3 CH.sub.2, and mixtures thereof, m, m' and n are identical or different and are each greater than or equal to zero, with the proviso that m+m'+n is from 3 to 300; by reacting a polyoxyalkylene compound of the formula.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.