Preparation of polyimide polymers
AssigneeGeneral Electric Company
InventorMartin John Lindway
Life of this patent
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Abstract
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.
Claims50
A process for the preparation of a reactive, friable polyimide powder comprising
- 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.
A reactive friable polyimide powder produced by the process comprising
- 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.
A process for coating a substrate comprising contacting the substrate with a reactive friable polyimide powder produced by 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.
A process to produce a polymer blend comprising combining a polymer with a reactive friable polyimide powder produced by 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.
A process for coating a substrate comprising
- contacting the substrate with a reactive, friable polyimide powder;
- and
- heating the powder to melt and fuse the powder to form a coating.
A process to produce a polymer blend comprising combining a polymer with a reactive, friable polyimide powder.
Dependencies are inferred from the claim text.