Silicone surfactants for the production of open cell polyurethane flexible foams

US6239186A · kind A · utility

Assignee

• AIR PRODUCTS AND CHEMICALS, INC. · US

Inventors

• Kevin Francis Mansfield · Harleysville, US
• David Robert Battice · Prudenville, US
• Allen Robert Arnold, Jr. · Catasauqua, US
• Stephan Herman Wendel · Oldenburg, DE
• John Herbert Frey · Allentown, US

Key dates

• Filing date: Oct 28, 1999
• Grant date: May 29, 2001
• Expiry date: Oct 28, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2483/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method for preparing a polyurethane flexible foam which comprises reacting an organic polyisocyanate with a polyol in the presence of urethane catalyst, water as a blowing agent, optionally a cell opener, and a polydimethylsiloxane cell stabilizer composition which comprises at least 90 wt % of polydimethylsiloxane molecules having the formula: EQU Me.sub.3 Si(OSiMe.sub.2).sub.n OSiMe.sub.3 where n is 5 to 7, provided at least 15 wt % of each of the three molecules in which n is 5, 6 and 7 is present.