Ray L Anderson

US Patent:

7160930, Jan 9, 2007

Filed:

Jul 14, 2004

Appl. No.:

10/890672

Inventors:

Thomas A. Sparks - Spring TX, US
Philip D. Harkins - Houston TX, US
Ray J. Anderson - Spring TX, US

Assignee:

Baysystems North America LLC - Pittsburgh PA

International Classification:

C08G 18/22

US Classification:

521125, 521131, 521164, 521167, 521173, 521902

Abstract:

A composition and a method for producing primarily water blown polyurethane foams is provided. The composition uses isocyanate ratios greater than conventional foam system to provide a water blown polyurethane foam suitable for a wide variety of applications including spray roofing, insulation, etc. The preferred composition for preparing a polyurethane foam comprises an isocyanate component and a polyol component, wherein the polyol component preferably comprises a combination of Mannich polyol, polyester polyol, and polyether polyol. Preferably, the composition includes water to act as a blowing agent and a metal salt catalyst to assist in the reaction. Preferably, the isocyanate index is between about 1. 2 and about 2. Additional catalysts, surfactants, flame retardants, and blowing agents may also be used depending upon the desired finished product.