Patent · US Expired

Method of producing highly branched polyesters with unsaturated end groups

US6828411B2 · kind B2 · utility

1Cited by

5References

12Claims

0Family size

Assignee

Dainippon Ink and Chemicals, Inc. · JP

Inventors

Rainer B. Frings · Berlin, DE
Gerwald Grahe · Berlin, DE
Ou Shibata · Osaka, JP

Key dates

Filing date	Feb 21, 2003
Grant date	Dec 7, 2004
Priority date	—
Expiry date	May 5, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G63/553
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A one-step polymerization process, leading directly to highly branched polyesters with unsaturated, either acrylate or sorbate end groups is described, which is based on the Diels-Alder reaction of polyfunctional sorbic esters with acrylates in defined ratios. A preferred embodiment of the invention is the Diels-Alder polymerization in aqueous emulsion.

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