Patent · US Expired

Method for free-radical polymerization of ethylenically unsaturated compounds

US7645842B2 · kind B2 · utility

4Cited by

8References

16Claims

0Family size

Assignee

RohMax Additives GmbH · DE

Inventors

Francois Acker · Bischwiller, FR
Markus Scherer · Lebach, DE
Alexander Dardin · Hemsbach, DE
Stephan Massoth · Biblis, DE
Bernd Amrhein · Schaafheim, DE
Detlef Bloos · Eberbach, DE
Valerie Dittgen
Alain Roos · Bischwiller, FR
Jean-Marc Beiner · Strasbourg, FR

Key dates

Filing date	Aug 1, 2005
Grant date	Jan 12, 2010
Priority date	—
Expiry date	Nov 7, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S526/919
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to a method for radical polymerization of one or several ethylenically unsaturated compounds, characterized in that it consists in providing at least 80.8 percent by weight ethylenically unsaturated compounds in relation to the total weight of the ethylenically unsaturated compounds, adding at least one polymerization initiator for radical polymerization in at least two steps, wherein more polymerization initiator is added in the second step than in the first.

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