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    • 15. 发明授权
    • Process for production of polycarbodiimide resin powder
    • 生产聚碳二亚胺树脂粉末的方法
    • US5650476A
    • 1997-07-22
    • US541157
    • 1995-10-11
    • Satoshi AmanoTomoki NakamuraTakahiko ItoHideshi TomitaNorimasa Nakamura
    • Satoshi AmanoTomoki NakamuraTakahiko ItoHideshi TomitaNorimasa Nakamura
    • C08G18/02
    • C08G18/025C08G2140/00
    • A process for producing a polycarbodiimide resin powder, which includes reacting an organic diisocyanate in the presence of a carbodiimidization catalyst in a solvent to produce a polycarbodiimide resin and obtaining the resin in a powder form, where the organic diisocyanate is represented by the following formula ##STR1## where R.sub.1 is a lower alkyl group or a lower alkoxyl group, or ##STR2## where R.sub.2 and R.sub.3 are independently a hydrogen atom, a lower alkyl group or a lower alkoxyl group, and X is an oxygen atom or a methylene group, or ##STR3## where R.sub.4 and R.sub.5 are independently a hydrogen atom, a lower alkyl group or a lower alkoxyl group; the solvent is a mixed solvent of a good solvent to polycarbodiimide resin and a poor solvent to the resin, having a precipitation number of 30-80; and when the reaction has reached a certain stage, the reaction system is cooled to make the system a slurry of a polycarbodiimide, and then the polycarbodiimide is obtained in a powder form.
    • 一种聚碳化二亚胺树脂粉末的制造方法,其特征在于,在碳二亚胺化催化剂存在下,在溶剂中使有机二异氰酸酯反应,生成聚碳化二亚胺树脂,得到粉末状的树脂,其中有机二异氰酸酯由下式 IMAGE>或,其中R1是低级烷基或低级烷氧基,或者其中R2和R3独立地是氢原子,低级烷基或低级烷氧基,X是氧原子或 亚甲基或者其中R 4和R 5独立地是氢原子,低级烷基或低级烷氧基; 溶剂是良溶剂与聚碳二亚胺树脂的混合溶剂和对树脂的不良溶剂的混合溶剂,其沉淀数为30-80; 当反应达到一定阶段时,将反应体系冷却,使体系成为聚碳化二亚胺的浆液,得到粉末状的聚碳化二亚胺。