Primer

US6602947B2 · kind B2 · utility

Assignee

• SIKA SCHWEIZ AG · CH

Inventors

• Peter Merz · Hanerau-Hademarschen, DE
• Shingo Tsuno · Zürich, CH

Key dates

• Filing date: Apr 30, 2001
• Grant date: Aug 5, 2003
• Expiry date: Apr 30, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31551
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

New primers for the improvement of the adhesion of cross-linking adhesive systems top polyolefinic thermoplastic materials such as e.g., polypropylene, polyethylene or EPDM are disclosed. Said primers, on the one hand are characterized by a simple method of production and good storage stability, on the other hand by good wetting and good homogeneous film forming characteristics, said film forming characteristics enabling a uniform thickness of the layer, leading to good adhesion qualities. Essential constituents of such primers are prepolymers based on hydrogenated polyisoprene diol.