Patent · US Expired

Polyurethane-polyacrylate hybrid dispersions containing allophanate groups

US6197874A · kind A · utility

9Cited by

7References

9Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Christoph Irle · Barcelona, ES
Harald Blum · Wachtendonk, DE
Martin Brahm · Siegen, DE
Wolfgang Kremer · Kerken, DE
Rolf Roschu · Willich, DE
Erhard Luhmann · Bad Fallingbostel, DE
Josef Pedain · Cologne, DE
Christian Wamprecht · Neuss, DE

Key dates

Filing date	Jan 21, 1999
Grant date	Mar 6, 2001
Priority date	—
Expiry date	Jan 21, 2019

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D175/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to polyurethane-polyacrylate hybrid dispersions comprising PA0 A) 20 to 99% by weight, based on resin solids, of a polyurethane wherein i) the polyurethane is rendered hydrophilic by ionic and/or nonionic hydrophilic groups and ii) the polyisocyanate component used to prepare the polyurethane contains an aliphatic or cycloaliphatic polyisocyanate containing allophanate groups, and PA0 B) 1 to 80% by weight, based on resin solids) of a polyacrylate polymer, wherein the sum of components A and B is 100%, based on the total weight of A) and B). The present invention also relates to the use of these hybrid dispersions for coating substrates, in particular wood.

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