Polyurethane foam

US8372893B2 · kind B2 · utility

Assignee

• SIKA TECHNOLOGY AG · CH

Inventors

• Hanna Lekovic · Troy, US
• Frank Hoefflin · Baden, CH
• Michael W. Anderson · West Chicago, US
• Trent Shidaker · Troy, US
• Michael Connolly · Ypsilanti, US
• Sheila Dubs · Conroe, US
• Jinhuang Wu · King of Prussia, US

Key dates

• Filing date: Sep 23, 2011
• Grant date: Feb 12, 2013
• Expiry date: Sep 23, 2031

Classification

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

Abstract

This disclosure describes a method of making a polyurethane foam and a method of reducing NVH expected to be experienced by a substrate using the foam. When the foam is subjected to 95% relative humidity for a period of 7 days at a temperature of about 50° C., the foam absorbs an amount of water that is less than about 30% of the weight of the foam.