Heat sealing textiles with copolyamides

US4566931A · kind A · utility

Assignee

• Chemische Werke Huels Aktiengesellschaft · US

Inventors

• Hans J. Panoch
• Rainer Feldmann · Marl, DE
• Hans Hinn · Marl, DE
• Siegfried Brandt
• Hans-Jurgen Haage · Herne, DE

Key dates

• Filing date: Dec 20, 1983
• Grant date: Jan 28, 1986
• Expiry date: Dec 20, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/2746
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Copolyamides based on dicarboxylic acids, diamines and omega amino carboxylic acids or lactams are used as thermoplastic adhesives to heat-seal especially siliconized textiles. The copolymers used consist of 20 to 80% by weight of one or more aliphatic omega amino carboxylic acids or lactams having 6 to 12 carbon atoms in the chain and 80 to 20% by weight of equimolar mixtures of one or more aliphatic dicarboxylic acids having 6 to 12 carbon atoms and aliphatic alpha-omega diamines and possibly cycloaliphatic diamines having 6 to 12 carbon atoms, at least 30% by weight of these diamines consisting of singly branched aliphatic diamines having 6 carbon atoms.