The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 18, 2013
Filed:
Feb. 27, 2007
Leroy L. Whinnery, Jr., Danville, CA (US);
Steven H. Goods, Livermore, CA (US);
Dawn M. Skala, Fremont, CA (US);
Craig C. Henderson, Falls Church, VA (US);
Patrick N. Keifer, Livermore, CA (US);
Leroy L. Whinnery, Jr., Danville, CA (US);
Steven H. Goods, Livermore, CA (US);
Dawn M. Skala, Fremont, CA (US);
Craig C. Henderson, Falls Church, VA (US);
Patrick N. Keifer, Livermore, CA (US);
Sandia Corporation, Albuquerque, NM (US);
Abstract
Disclosed is a method for making a polyurethane closed-cell foam material exhibiting a bulk density below 4 lbs/ftand high strength. The present embodiment uses the reaction product of a modified MDI and a sucrose/glycerine based polyether polyol resin wherein a small measured quantity of the polyol resin is 'pre-reacted' with a larger quantity of the isocyanate in a defined ratio such that when the necessary remaining quantity of the polyol resin is added to the 'pre-reacted' resin together with a tertiary amine catalyst and water as a blowing agent, the polymerization proceeds slowly enough to provide a stable foam body.