US3897395.pdf (2.31 MB)
Process for chain-extending unsaturated terminated polyimides and products prepared therefrom
standard
posted on 2016-06-07, 00:00 authored by Gaetano Francis D'AlelioAromatic polyimides with reactive end groups are cured by coupling together by addition or condensation to increase molecular weight with little or no by-product formation. These polyimides can be shaped and formed prior to the coupling. The aromatic polyimides appropriate for coupling are formed by the reaction of an aromatic dianhydride and an aromatic diamine in ratios to provide the appropriate end groups, or by including in the reaction mixture a compound which will provide reactive end groups, e.g., aromatic nitrile, allyl, propargyl, styryl, etc. Depending on the reactive end groups present, coupling of the polyimide is carried out either by self-coupling or by reacting the polyimide with a complementary organic compound. Included in the latter is the reaction with an aromatic bis-dipole compound which will propagate the polymer chain.
History
Patent Number
US 3897395 B2Other Application
05/363,801Inventor
Gaetano Francis D'AlelioInventor from Local Institution
Gaetano Frank D'AlelioAssignee
University of Notre Dame Du LacDate Modified
2016-06-07Language
- English
Claims
13Publisher
United States Patent and Trademark OfficeCooperative Patent Classification Codes
C08G 18/6438 (20130101); C08G 73/1003 (20130101); C08G 73/1067 (20130101); C08G 73/1071 (20130101); C08G 73/1064 (20130101); Y10S 525/928 (20130101)Contributor
Gaetano Frank D'AlelioInternational Patent Classification Codes
C08G 73/00 (20060101); C08G 73/10 (20060101); C08G 18/00 (20060101); C08G 18/64 (20060101); C08g 020/32 ()US Patent Classification Codes
526/263; 521/157; 521/185; 521/54; 521/77; 525/422; 525/436; 525/928; 526/237; 526/259; 526/265; 528/125; 528/127; 528/128; 528/170; 528/172; 528/180; 528/188; 528/222; 528/223; 528/225; 528/229; 528/312; 528/319; 528/322; 528/351; 528/352; 528/353; 528/73; 528/74; 546/37; 546/66; 548/433;Usage metrics
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