Patent · US Expired

Hardeners

US7641975B2 · kind B2 · utility

0Cited by

15References

13Claims

0Family size

Assignee

Bayer MaterialScience AG · DE

Inventors

Wolfgang Fischer · Meerbusch, DE
Markus Mechtel · Neunburg vorm Wald, DE
Jan Weikard · Neunburg vorm Wald, DE

Key dates

Filing date	Dec 3, 2004
Grant date	Jan 5, 2010
Priority date	—
Expiry date	Jan 13, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31935
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for the preparation of dual-cure hardeners, coating systems which contain these hardeners, and the use of these coating systems, as well as substrates coated with these coating agents. The dual-cure hardeners are prepared by reacting at least one diisocyanate or polyisocyanate A with the product B of the reaction of B1 acrylic acid, methacrylic acid and/or dimeric acrylic acid with B2 glycidyl methacrylate and/or glycidyl acrylate, wherein B contains less than 0.2 wt. % of epoxide groups.

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