Coating powders based on polyamide and adhesion improving diisocyanate additive for use in melt film coating method

US4689361A · kind A · utility

Assignee

• Huls Aktiengesellschaft · DE

Inventors

• Salih Mumcu · Marl, DE
• Rainer Feldmann · Marl, DE

Key dates

• Filing date: Mar 20, 1986
• Grant date: Aug 25, 1987
• Expiry date: Mar 20, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31725
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Coating powders for the melt film coating method, based on polyamides and adhesion improving additives. The polyamides are aliphatic homo- and/or copolyamides having at least six carbon atoms containing functional groups consisting of at least 80% of primary, secondary, or mixtures of primary and secondary amino groups. As the adhesion improving additive there is added from 0.1 to 10% by weight referred to the polyamides of an isophoronediisocyanate capped with lactams, an isophoronediisocyanate capped with acetonoxime or an isophoronediisocyanate capped with an oligomer of acetonoxime.