Laminating adhesives for flexible packaging

US5834554A · kind A · utility

Assignee

• H.B. Fuller Licensing & Financing, Inc · US

Inventors

• Youlu Duan · Maplewood, US
• Douglas U. Gwost · Shoreview, US
• Lowell Lindquist · Windom, US
• Scott Rhein · Forest Lake, US
• Thomas E. Rolando · Maple Grove, US
• Sonja Stammler · North Branch, US
• Peter Voss · Eagan, US
• Michael J. Dockniak · Stillwater, US

Key dates

• Filing date: Mar 5, 1996
• Grant date: Nov 10, 1998
• Expiry date: Mar 5, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31605
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the preparation of sulfonated polyurethane-urea polymers, which are useful film to film laminating adhesives for flexible packaging in which the urethane-urea polymer component has no amide linkages. The water-based sulfonated polyurethane prepolymers are processed at reduced temperatures and are substantially free of volatile and/or leachable contaminants.