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Title: Method for providing a low density high strength polyurethane foam

Patent ·
OSTI ID:1084087
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Disclosed is a method for making a polyurethane closed-cell foam material exhibiting a bulk density below 4 lbs/ft.sup.3 and 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.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC04-94AL85000
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Number(s):
8,466,207
Application Number:
11/712,283
OSTI ID:
1084087
Country of Publication:
United States
Language:
English

References (9)

Thermally stable and high impact resistant structural polyurethane foam patent September 1987
Reactive amine catalysts for use in polyurethane polymers patent June 2000
Polyisocyanate compositions and a process for the production of low-density flexible foams with low humid aged compression sets from these polyisocyanate compositions patent April 2002
Low density energy management urethane foam patent February 1980
Energy-attenuating polyurethanes patent February 1988
Impact energy-absorbing urethane foam patent September 1978
Composition and method for preparing polyurethanes and polyurethane foams patent February 2003
Polyurethane prepolymer compositions, foams made therefrom and methods of making each thereof patent October 1999
Polyurethane foam product for an impact absorber patent July 1980

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