Patent · US Expired

Aqueous polyurethane dispersions and their use for preparing coatings with excellent hydrolytic and thermal stability

US5733967A · kind A · utility

4Cited by

13References

6Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Douglas A. Wicks · Mount Lebanon, US
Arthur W. Mason · Sistersville, US
Philip E. Yeske · Pittsburgh, US
Lyuba K. Gindin · Pittsburgh, US
Kenneth P. Yonek · Eighty Four, US
Peter D. Schmitt · Lambsheim, DE

Key dates

Filing date	Aug 20, 1996
Grant date	Mar 31, 1998
Priority date	—
Expiry date	Aug 20, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/3821
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to aqueous dispersions of polyurethanes containing hydantoin groups (calculated as C.sub.3 N.sub.2 O.sub.2, MW 96) in an amount of 1 to 40% by weight, based on resin solids. The present invention also relates to the use of these dispersions for preparing coatings with excellent hydrolytic and thermal stability.

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