Modified nano calcium carbonate-polyurethane-polyamide foam and preparation method thereof

The invention provides a modified nano calcium carbonate-polyurethane-polyamide foam composite material which is composed of the following components in percentage by weight: 45-55% of isocyanate, 5-15% of polyether, 4-8% of fatty acid modified nano calcium carbonate, 4-9% of methylhexahydrophthalic anhydride, 4-6% of azodiisobutyronitrile, 7-12% of 2,3,6-tri(dimethylaminomethyl)phenol, 12-20% ofpolyurethane fiber, 2-5% of n-pentane and 0.0001-1% of silicon foam stabilizer. The invention also provides a preparation method of the composite material. According to the rigid foam composite material provided by the invention, on the basis of rigid polyurethane foam synthesis, polyurea and amide groups are introduced, and the characteristics of nano calcium carbonate are utilized to further improve the system, so that the product has excellent mechanical properties and thermal stability. 本发明提供了一种改性纳米碳酸钙-聚氨酯-聚酰胺泡沫复合材料，由如下重量百分比的成分组成：异氰酸酯45-55％，聚醚5-15％，脂肪酸改性纳米碳酸钙4-8％，甲基六氢苯酐4-9％，偶氮二异丁腈4-6％，2,3,6-三(二甲氨基甲基)苯酚7-12％，聚氨基甲酸酯