Number | Name | Date | Kind |
---|---|---|---|
2886555 | Bunge et al. | May 1959 | |
3080368 | Wegler et al. | Mar 1963 | |
3427880 | Grobel et al. | Feb 1969 | |
3807218 | Carson et al. | Apr 1974 |
Entry |
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Saunders, J. H. et al., "Polyurethanes:Chemistry and Technology, I. Chemistry,"; Interscience Publishers, 1962, pp. 118-121. |