Aqueous coating agent, its manufacture and use for producing layers of filler

US5521247A · kind A · utility

Assignee

• Herbert GmbH · DE

Inventors

• Klaus Dobler · Gerlingen, DE
• Michael Georgiadis · Lyndhurst, US
• Wolfgang Goldner · Heiligenhaus, DE
• Knut Graf · Hattingen, DE

Key dates

• Filing date: Dec 29, 1993
• Grant date: May 28, 1996
• Expiry date: Dec 29, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D175/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Aqueous coating agent including a water-dilutable mixture of binding agents of PA1 I. 50 to 88 wt. % of a neutralised water-soluble reaction product including PA2 (A) 10 to 80 wt. % of a polyurethane resin with an acid number of 70 to 160, at least one terminal blocked isocyanate group devoid of free hydroxyl groups and fatty acid residues with more than 12 C-atoms and with a limiting viscosity number of 6.5 to 12.0 ml/g, measured in DMF at 20.degree. C., and PA2 (B) 20 to 90 wt. % of a polyester resin with an OH-number of 50 to 500, an acid number of less than 20, a limiting viscosity number of 8.0 to 13.0 ml/g, measured in DMF at 20.degree. C., with the reaction product having a limiting viscosity number of 13.5 to 18.0 ml/g measured in DMF at 20.degree. C. PA1 II. 10 to 40 wt. % of one or several blocked polyisocyanates not capable of being diluted with water, and PA1 III. 2 to 30 wt. % of at least one amine resin by way of additional cross-linking agent.