Patent · US Expired

Polycarbodiimide-based block copolymers, a method of preparing them and their use as hydrolysis stabilizers

US6498225B2 · kind B2 · utility

7Cited by

4References

6Claims

0Family size

Assignee

Rhein Chemie Rheinau GmbH · DE

Inventors

Heiko Tebbe · Dormagen, DE
Ludger Heiliger · Leverkusen, DE
Volker Müller · Philippsburg, DE

Key dates

Filing date	Mar 20, 2001
Grant date	Dec 24, 2002
Priority date	—
Expiry date	Mar 20, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S525/907
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to carbodiimide-based block copolymers, a method of preparing them and also their use as hydrolysis stabilizers in ester-group-containing polymers. The advantages of the block copolymers according to the invention are, in particular, their high efficiency at low dosage as hydrolysis protection in ester-group-containing polymers, and also their nontoxic behavior, their high thermal stability and their good compatibility during incorporation in the polymeric matrix of the polymers to be protected.

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