Aqueous coating agent and its use in lacquers

US6407151B1 · kind B1 · utility

Assignee

• Wolff Walsrode AG · DE

Inventors

• Lutz Hoppe
• Hans-Günter Poersch-Panke · Walsrode, DE

Key dates

• Filing date: Jul 26, 2000
• Grant date: Jun 18, 2002
• Expiry date: Jul 26, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D175/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A cellulose substance-containing lacquer emulsion prepared froma) 5-50 wt. % of cellulose substanceb) 5-50 wt. % of one or more hydroxyl group-containing lacquer resinsc) 0.1-10 wt. % of polyisocyanates with more than one free isocyanate groupd) 0.5-30 wt. % of plasticizere) 0.0-20 wt. % of emulsifierf) 0.0-45 wt. % of at least one organic solventg) 10-65 wt. % of waterwherein the sum of a) to g) is always 100 wt. %, characterized in that the ratio by weight of OH groups (from the lacquer resin) to NCO groups is 1:0.01-1.0 is described.