Patent · US Expired

Polymaleic anhydride derivatives

US4734204A · kind A · utility

9Cited by
6References
6Claims
0Family size

Assignee

Inventor

Key dates

Filing dateAug 30, 1985
Grant dateMar 29, 1988
Priority date
Expiry dateAug 30, 2005

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC08F8/14
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

The invention provides partial esters of a polymer containing maleic anhydride or maleic acid radicals and an alkoxylated alcohol, an alkoxylated alkyl phenol or a polyalkylene glycol. The products are useful as demulsifiers for water-in-oil emulsions.

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