Patent · US Expired

Method for producing polymers

US6809165B2 · kind B2 · utility

5Cited by

6References

12Claims

0Family size

Assignee

BASF SE

Inventors

David Christie · Mannheim, DE
Sylke Haremza · Neckargemünd, DE
Susanne Brinkmann-Rengel · Ober-Olm, DE
Roman Benedikt Raether · Speyer, DE

Key dates

Filing date	Sep 27, 2002
Grant date	Oct 26, 2004
Priority date	—
Expiry date	Jan 17, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F2438/02
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for the preparation of polymers is described, wherein at least one first ethylenically unsaturated monomer is subjected to a free radical polymerization in the presence of stable free radicals or sources of stable free radicals and of a compound having at least one free thiol group to give a polymer, and wherein the molar ratio of compound having a free thiol group to stable free radicals is from 0.05 to 1.1. The polymerization rate is substantially increased by the compound having a free thiol group.

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