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US 2003/0212243 A1Published application
Polyimides from 2,3,3',4'-biphenyltetracarboxylic dianhydride and aromatic diamines
AssigneeAdministrator of the National Aeronautics and Space Administration
InventorsPaul M. Hergenrother, Joseph G. Smith JR., John W. Connell, Kent A. Watson
Life of this patent
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Abstract
The present invention relates generally to polyimides. It relates particularly to novel polyimides prepared from 2,3,3′,4′-biphenyltetracarboxylic dianhydride and aromatic diamines. These novel polyimides have low color, good solubility, high thermal emissivity, low solar absorptivity and high tensile strength.
Claims9
A polyimde prepared from reacting 2,3,3′,4-biphenyltetracarboxylic dianhydride with an aromatic diamine selected from the group consisting of:
- 4
- wherein X is selected from the group consisting of:
- 5
- wherein Y is selected from the group consisting of CH3, phenyl, chloro and bromo;
- 6
2 more elements
Dependencies are inferred from the claim text.