Patent · US Expired

Polyethers obtainable by reacting alkylolated bis-(4-hydroxyphenyl)-methanes with polyalkylene oxides, and their use as oil demulsifiers

US4814394A · kind A · utility

8Cited by

2References

4Claims

0Family size

Assignee

BASF SE

Inventors

Klaus Barthold · Mannheim, DE
Knut Oppenlaender · Ludwigshafen, DE
Juergen Lasowski · Tokyo, JP
Richard Baur · Mutterstadt, DE

Key dates

Filing date	Apr 28, 1987
Grant date	Mar 21, 1989
Priority date	—
Expiry date	Apr 28, 2007

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G65/34
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polyethers with are suitable as oil demulsifiers are obtainable by reacting PA0 (A) a polyalkylene oxide obtained from ethylene oxide and propylene oxide and containing in total from 5 to 200 alkylene oxide units with PA0 (B) an alkylolation product of a low molecular weight aldehyde and a bis-(4-hydroxyphenyl)-methane of the general formula II ##STR1## wherein R.sup.1 and R.sup.2 may be identical or different and are each hydrogen, low molecular weight alkyl, phenyl, carboxyl or low molecular weight alkoxycarbonyl, the molar reaction ratio of the compound of the formula II to the alkylolating aldehyde being from 1:1 to 1:4, at from 100.degree. to 180.degree. C. in the presence of an acidic catalyst with removal of the water of reaction, the weight ratio of A to B being from 5:1 to 1:3.

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