Process for the production of high air flow polyether foams and the foams produced by this process

US8975335B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Stanley L. Hager · Cross Lanes, US
• Bruce Britt · Charleston, US
• Susan B. McVey · Washington, US
• Micah Moore · Red House, US
• Peter Uthe · Scott Township, US
• Jack R. Reese · Hurricane, US

Key dates

• Filing date: Sep 23, 2011
• Grant date: Mar 10, 2015
• Expiry date: Aug 18, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

This invention relates to novel polyol blends, a process for preparing foams with very low resistance to air flow from certain polyol blends and to the resultant foams. The polyol blends comprise one or more monofunctional polyethers having a hydroxyl number of less than 28; one or more polyether polyols having a hydroxyl number of 20 to 240 and containing at least 50% of copolymerized oxyethylene; one or more polyether polyols having a hydroxyl number of 47 to 300 and containing from 5 to 40% of copolymerized oxyethylene; and optionally, one or more polyether polyols having a hydroxyl number of 10 to 45. This process of the invention comprises reacting one or more polyisocyanates, with an isocyanate-reactive component which comprises a specific polyol blend, in the presence of at least one catalyst, at least one surfactant and at least one blowing agent.