Isocyanate-reactive composition and process for preparing a flexible polyurethane foam
AssigneeThe Dow Chemical Company
InventorsRichard G. Skorpenske, Alan K. Schrock
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Abstract
The present invention refers to isocyanate-reactive compositions containing hindered phenolic antioxidants having a molecular weight of at least 700. These compositions, when used to prepare flexible polyurethane foams, especially slabstock foam, provide foams which exhibit a significant reduction of scorch.
Claims18
An isocyanate-reactive composition comprising an isocyanate-reactive compound having an equivalent weight of from about 400 to about 5,000, and a hindered phenolic antioxidant having a molecular weight greater than about 700 in an amount sufficient to reduce scorch up to about 50 percent when compared to a similar isocyanate-reactive composition having an equal number of equivalents of 2,6-di-tert-butyl-4-methylphenol.
A process for preparing a flexible polyurethane foam comprising reacting together an organic polyisocyanate with an isocyanate-reactive composition comprising an isocyanate-reactive compound having an equivalent weight of from about 400 to about 5,000, and an antioxidant comprising a hindered phenolic compound having a molecular weight greater than about 600 in an amount sufficient to reduce scorch up to about 50 percent when compared to a similar isocyanate-reactive composition having an equal number of equivalents of 2,6-di-tert-butyl-4-methylphenol, in the presence of a blowing agent and under conditions sufficient to form the polyurethane foam.
An isocyanate-reactive composition comprising an isocyanate-reactive compound having an equivalent weight of from about 400 to about 5,000;
- a hindered phenolic antioxidant having a molecular weight about 700, in an amount sufficient to reduce scorch up to about 50 percent when compared to a similar isocyanate-reactive composition having an equal number of equivalents of 2,6-di-tert-butyl-4-methylphenol;
- and a blowing agent.
Dependencies are inferred from the claim text.