Patent · US Expired

Processes for production of azo macroinitiators for the synthesis of block copolymers and of aqueous block copolymer dispersions and emulsions and the use thereof

US5612406A · kind A · utility

2Cited by

3References

2Claims

0Family size

Assignee

Dainippon Ink and Chemicals, Inc. · JP

Inventors

Rainer B. Frings · Berlin, DE
Shigeru Komazaki · Osaka, JP
Gerwald Grahe · Berlin, DE

Key dates

Filing date	Apr 3, 1996
Grant date	Mar 18, 1997
Priority date	—
Expiry date	Apr 3, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09J153/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention concerns a process for the production of block copolymers or aqueous dispersions and emulsions thereof, whereby azo macroinitiators are reacted with radical-polymerizable monomers or a mixture of several radical-polymerizable monomers. The azo macroinitiators are obtained by reacting simple reactive azo compounds with prepolymers with a molecular weight between 400 and 20000, which possess at least 2 functional groups, e.g. polyurethanes or polyesters. The aqueous block copolymer dispersions and emulsions produced according to the invention are suitable for use for the production of paints, adhesives etc.

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