Patent · US Expired

Aqueous coating agent, preparation of the same and use thereof for multi-layered lacquering

US6437041B1 · kind B1 · utility

6Cited by

6References

8Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Werner Bosch · Wuppertal, DE
Armin Gobel · Syke, DE
Holger Schmidt · Wuppertal, DE
Bettina Vogt-Birnbrich · Solingen, DE

Key dates

Filing date	Sep 29, 2000
Grant date	Aug 20, 2002
Priority date	—
Expiry date	Sep 29, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2270/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Aqueous coating agents suitable for multi-layered finishes containing an aqueous binder dispersion based on polyurethane/polymer hybrid polymers with a ratio by weight of polyurethane fraction to polymer fraction of 0.1:1 to 50:1, with a hydroxyl value of 0 to 150 mg KOH/g, an acid value of 1.5 to 60 mg KOH/g, and a concentration of 0.5 to 300 mmol of silicon per 100 g of solid resin in the form of siloxane bridges (—Si—O—Si—) incorporated into the polyurethane fraction and/or in the form of silanol groups bonded to the polyurethane fraction, obtainable by polymerization of olefinically unsaturated monomers in the presence of polyurethane prepolymers which do not contain olefinic double bonds.

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