Described is a lightweight open-cell flexible foam having a density no greater than about 6 pounds per cubic foot, preferably less than 1.0 pound per cubic foot (pcf) comprising the reaction product of an organic polyisocyanate and a mixture of difunctional acids, acid anhydrides, and difunctional anhydrides in the presence of a tertiary amine triazine catalyst, which reactants during the manufacturing process generate carbon dioxide, wherein the ratio of imide to amide groups in the final product is greater than 1.
所述的是一种轻质开孔软质泡沫塑料,其密度不大于约 6 磅/立方英尺,最好小于 1.0 磅/立方英尺(pcf),包括有机多
异氰酸酯与双官能酸、酸酐和双官能酸酐混合物在叔胺三嗪催化剂存在下的反应产物,这些反应物在生产过程中会产生
二氧化碳,其中最终产品中
亚胺基团与酰胺基团的比例大于 1。