Use of a polyamine as cell opener in polyurethane foam
AssigneeThe Dow Chemical Company
InventorsKurt C. Frisch, Jr., Robert F. Harris
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Abstract
This invention relates to the use of polyamine compounds having their backbone modified by the incorporation of aminocarbonyl or aminothiocarbonyl moieties as cell opening agents in the preparation of open-celled flexible polyurethane foams. Use of the polyamine compound as cell opening agent provides for improved cell opening and provides foam with acceptable physical properties.
Claims22
An open-celled polyisocyanate-based polymer the preparation of which comprises reacting in the presence of a blowing agent,
- (a) an organic polyisocyanate,
- (b) at least one polyfunctional isocyanate-reactive component, and
- (c) from about 0.1 to about 15 percent by weight, relative to the amount of (b), of a cell opener which comprises a polyamine containing at least two terminal amine moieties, at least three polyalkyleneoxy moieties and at least two aminocarbonyl or aminothiocarbonyl moieties selected from the group consisting of urea, amide, biuret, thiourea, thioamide and dithiobiuret, or mixtures thereof provided that each aminocarbonyl or aminothiocarbonyl moiety is separated from each terminal amine moiety by at least one polyalkyleneoxy moiety.
An isocyanate-reactive composition which comprises (a) at least one polyfunctional isocyanate-reactive component, and (b) from about 0.1 to about 15 percent by weight, relative to (a), of a cell opener characterized in that the cell opener comprises polyamine containing at least two terminal amine moieties, at least three polyalkyleneoxy moieties and at least two aminocarbonyl or aminothiocarbonyl moieties selected from the group consisting of urea, amide, biuret, thiourea, thioamide and dithiobiuret, or mixtures thereof provided that each aminocarbonyl or aminothiocarbonyl moiety is separated from each terminal amine moiety by at least one polyalkyleneoxy moiety.
Dependencies are inferred from the claim text.