Patent · US Expired

High molecular weight copolymers of maleic anhydride and methyl vinyl ether

US5047490A · kind A · utility

5Cited by

5References

10Claims

0Family size

Assignee

Giulini Chemie GmbH · DE

Inventors

Zvi Pehlah · Savyon, IL
Istvan Potencsik · Mannheim, DE
Werner Kopp · Speyer, DE
Ernst Urmann · Ludwigshafen, DE

Key dates

Filing date	Jul 14, 1989
Grant date	Sep 10, 1991
Priority date	—
Expiry date	Jul 14, 2009

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F222/06
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process of manufacturing powdered copolymers of maleic anhydride with methyl vinyl ether in a mole ratio of 1:1 and a specific viscosity in a range from 2 to 5 by copolymerization of maleic anhydride with methyl vinyl ether in the presence of radical initiators to initiate polymerization. The process includes mixing maleic anhydride with an excess of about 3 to about 20 mol methyl vinyl ether per mol maleic anhydride and initiating a polymerization reaction with a radical initiator added in a quantity of from about 0.001 to about 1 weight % with respect to the maleic anhydride. The polymerization reaction takes place in the absence of other solvents.

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