The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 13, 1983
Filed:
Dec. 21, 1981
Helmut Diery, Kelkheim, DE;
Martin Hille, Liederbach, DE;
Hoechst Aktiengesellschaft, , DE;
Abstract
Oxyalkylated addition products from ethylene oxide-propylene oxide block polymers and bis-glycidyl ethers, obtained by the addition of ethylene oxide-propylene oxide block polymers of the formula ##STR1## wherein R denotes methyl or ethyl, n and m are numbers which are so chosen that the content of polyethylene oxide groups is 5 to 80% of the molecular weight of the block polymer, and p is a number larger than 10, to bis-glycidyl ethers of the formula ##STR2## wherein the R.sup.1 's can be identical or different and denote hydrogen, C.sub.1 -C.sub.4 -alkyl or halogen, in particular chlorine, A denotes a direct bond, a sulfonyl or cyclohexyl group or a group of the formula ##STR3## R.sup.2 denotes hydrogen, methyl or phenyl, and a denotes an integer from 0 to 10, and subsequent oxyalkylation with propylene oxide or butylene oxide and, if appropriate, ethylene oxide, the amount of propylene oxide or butylene oxide which is added last being 1 to 90% by weight of the total molecule and the amount of ethylene oxide which, optionally, has also been added, being 50% by weight of the total molecule. These addition compounds are used for breaking crude oil emulsions.