Polyamide coated base material having an intermediate layer of polybutadiene

US4239807A · kind A · utility

Assignee

• Chemische Werke Huels Aktiengesellschaft · US

Inventors

• Rainer Feldmann · Marl, DE
• Klaus Gorke · Dorsten, DE

Key dates

• Filing date: Jun 4, 1979
• Grant date: Dec 16, 1980
• Expiry date: Jun 4, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31931
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

An aqueous polybutadiene dispersion is applied as the adhesive intermediary layer in the preparation of polyamide coatings on metal objects by a process of sintering the polyamide powders. The dispersion contains a liquid polybutadiene with a dynamic viscosity from about 70 to 30,000 millipascal seconds and with a configuration of 40 to 95% of cis-1,4-polybutadiene, 0 to 30% of trans-1,4-polybutadiene, 1 to 60% of 1,2-polybutadiene and, referred to the polybutadiene, 0.5 to 10% by weight of an emulsifier.