초록 ▼

A process for the preparation of a reactive friable polyimide powder comprises dissolving an aromatic dianhydride and an organic diamine in a high-boiling, aprotic organic solvent to form a reaction solution; heating the reaction solution under imidization conditions to form an insoluble reactive po

A process for the preparation of a reactive friable polyimide powder comprises dissolving an aromatic dianhydride and an organic diamine in a high-boiling, aprotic organic solvent to form a reaction solution; heating the reaction solution under imidization conditions to form an insoluble reactive polyimide and to effect substantially complete distillation of the water of reaction out of the reaction solution; and separating the insoluble reactive polyimide from the reaction solution to form a reactive friable polyimide powder.

대표청구항 ▼

A process for the preparation of a reactive friable polyimide powder comprises dissolving an aromatic dianhydride and an organic diamine in a high-boiling, aprotic organic solvent to form a reaction solution; heating the reaction solution under imidization conditions to form an insoluble reactive po

A process for the preparation of a reactive friable polyimide powder comprises dissolving an aromatic dianhydride and an organic diamine in a high-boiling, aprotic organic solvent to form a reaction solution; heating the reaction solution under imidization conditions to form an insoluble reactive polyimide and to effect substantially complete distillation of the water of reaction out of the reaction solution; and separating the insoluble reactive polyimide from the reaction solution to form a reactive friable polyimide powder. east one monomer that is an olefin, diolefin or unsaturated compound. 17. The process of claim 16, wherein there are at least 2 monomers. 18. The process of claim 17, wherein said at least 2 monomers comprise ethylene and an α-olefin. 19. The process of claim 17, wherein said at least 2 monomers comprise ethylene and either 1-octene or 1-hexene. 20. The process of claim 17, wherein there are at least 3 monomers in the process, with said monomers comprising ethylene, an α-olefin and a diolefin. 21. The process of claim 17, wherein said two monomers comprise eth