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US 4,072,623 AGranted
Polyurethane foam system
AssigneeOwens-Corning Fiberglas Corporation
InventorsDavid E. Hayden, Millard E. Foucht
Life of this patent
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Abstract
We disclose a combination of three polyols. Polyurethane foams formed by reacting these polyols with an isocyanate exhibit good foam-substrate adhesion and good foam surface properties. This combination of polyols performs especially well in spray applications and is ideally suited for use in cold weather.
Claims9
A polyol composition comprising at least a first, a second and a third polyol wherein,
- a. said first polyol is an oxyalkylated Mannich reaction product of a phenol, an aldehyde and an alkanol amine, reacted to a hydroxyl number within the range of from about 350 to about 650;
- b. said second polyol is an oxyalkylated polyamine reacted to a hydroxyl number within the range of from about 600 to about 800;
- and
- c. said third polyol is pentaerythritol oxyalkylated to a hydroxyl number within the range of from about 350 to about 650.
1 more element
Dependencies are inferred from the claim text.