Patent · US Expired

Acrylic block copolymer pigment dispersants containing heterocyclic groups

US6316564A · kind A · utility

7Cited by

26References

17Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Josef Huybrechts · Turnhout, BE
Daniel C. Kraiter · Wilmington, US
Roger Vervloet · Mechelen, BE

Key dates

Filing date	Oct 7, 1999
Grant date	Nov 13, 2001
Priority date	—
Expiry date	Oct 7, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D11/326
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Acrylic AB block copolymers prepared by group transfer polymerization that are useful as pigment dispersants, characterized by mononuclear or dinuclear heterocyclic groups bonded to the highly polar anchoring A segment of the block copolymer backbone to facilitate attachment on a pigment surface and improve dispersant efficiency in solvent-borne paint systems.

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