Number | Name | Date | Kind |
---|---|---|---|
3198851 | Hoy | Aug 1965 | |
3242108 | McGary et al. | Mar 1966 | |
3313747 | Schramm | Apr 1967 | |
3673128 | Hayash et al. | Jun 1972 | |
3793236 | Ashida et al. | Feb 1974 | |
3849349 | Frisch et al. | Nov 1974 | |
4003859 | Reymore et al. | Jan 1977 | |
4220731 | Zuppinger | Sep 1980 | |
4258137 | Cogliano | Mar 1981 |
Entry |
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Nicholas. L. and G. T. Gmitter, "Heat Resistant Rigid Foams by Trimerization of Isocyanate Terminated Prepolymers", Journal of Cellular Plastics, 1965, pp. 85-90. |