Patent · US Expired

(CO)polymerization of vinyl chloride in the presence of a stable nitroxyl radical

US6844405B2 · kind B2 · utility

2Cited by

2References

18Claims

0Family size

Assignee

Ciba Specialty Chemicals Corporation · US

Inventors

Rudolf Pfaendner · Rimbach, DE
Thomas Wannemacher · Taufkirchen, DE
Dietrich Braun · Darmstadt, DE

Key dates

Filing date	Nov 6, 2001
Grant date	Jan 18, 2005
Priority date	—
Expiry date	Nov 18, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08K5/34
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention pertains to a process for controlled free radical polymerization or copolymerization of vinyl chloride at a temperature between 40° C. and 95° C., at a pressure between 5 and 30 bar in the presence of a stable free nitroxyl radical.

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