US3890272.pdf (1.27 MB)
Polymerizing bis-maleimides
standard
posted on 2016-06-07, 00:00 authored by Gaetano Francis D'AlelioProcesses for preparing polyimides from bis-maleimides are provided. In these processes, a bis-maleimide is polymerized in the presence of a catalytic amount (usually about 0.01 to 5% by weight of the bis-maleimide) of an alkali metal salt of a Bronsted acid. Preferably, the polymerization is also conducted in the presence of a small amount (usually 0.01 to 5% by weight of the bis-maleimide) of an activator for the catalyst. The activator is an aprotic organic compound having a dielectric constant between about 35 and 45. Melt polymerization is preferred at a preferred temperature of 150.degree. to 275.degree.C.
History
Patent Number
US 3890272 B2Other Application
05/363,799Inventor
Gaetano Francis D'AlelioInventor from Local Institution
Gaetano Frank D'AlelioAssignee
University of Notre Dame Du LacDate Modified
2016-06-07Language
- English
Claims
21Publisher
United States Patent and Trademark OfficeCooperative Patent Classification Codes
C08G 73/12 (20130101); C08G 73/127 (20130101); C08G 73/126 (20130101); C08G 73/125 (20130101)Contributor
Gaetano Frank D'AlelioInternational Patent Classification Codes
C08G 73/00 (20060101); C08G 73/12 (20060101); C08g 020/32 ()US Patent Classification Codes
526/204; 526/212; 526/213; 526/214; 526/216; 526/220; 526/222; 526/236; 526/248; 526/262; 528/170; 528/188; 528/229; 528/321; 528/351; 528/352; 528/353;Usage metrics
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