Patent · US Expired

Method for preparing (co)polymers having a narrow molecular weight distribution

US6303722A · kind A · utility

0Cited by

2References

22Claims

0Family size

Assignee

BASF SE

Inventors

Christof Mehler · Dossenheim, DE
Thieo E. Hogen-Esch · South Pasadena, US
Axel Muller · Wiesbaden, DE
Angela P. Zagala · Naperville, US

Key dates

Filing date	Dec 10, 1998
Grant date	Oct 16, 2001
Priority date	—
Expiry date	Dec 10, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F297/048
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention concerns a novel method for preparing polymers (preferably (meth)acrylate polymers and copolymers) having a narrow molecular weight distribution by metal-free anionic polymerization in the presence of a phosphonium salt of a nitrogen, oxygen and/or sulfur anion. The present invention also concerns block copolymer and methods of making the same using anionic polymerization in the presence of the phosphonium salt to prepare at least one block of the copolymer.

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