Flexible polyimide foams having enhanced compression charateristics and softness for use in the manufacture of seat cushions may be produced from novel polyimides prepared by reaction of at least one aromatic and/or heterocyclic primary diamine with a mixture of at least two organic tetracarboxylic acids or derivatives thereof, at least one of which is from 1 to 40 mol percent of a 2-(vicinal-di-carboxycyclohexenyl)succinic acid or derivative thereof and a second of which is an aromatic tetracarboxylic acid or derivative thereof.
柔性聚
酰亚胺泡沫具有增强的压缩特性和柔软性,可用于制造座垫,其原料是新型聚
酰亚胺,制备方法是将至少一种芳香族和/或杂环族伯二胺与至少两种有机四
羧酸或其衍
生物的混合物反应,其中至少一种是 1 至 40 摩尔百分率的 2-(沧醛-二羧基
环己烯)
琥珀酸或其衍
生物,第二种是芳香族四
羧酸或其衍
生物。