Thermally stable polyimide polysulfone compositions for composite structures
AssigneeThe Boeing Company
InventorsHyman R. Lubowitz, Clyde H. Sheppard
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Abstract
Resins are prepared from polymers that bear difunctional groups derived from compounds that are condensation products of amino-phenols and acid anhydrides. The polymers are prepared by coreacting aromatic compounds holding two hydroxyl groups, aromatic compounds holding two active halogen groups, and the condensation product of amino-phenol and acid anhydride, the condensation product holding one hydroxyl group. The resulting product has a molecular weight between about 1,000 and 40,000, preferably between about 5,000 and 30,000, and can be cross-linked to form a resin that is thermoplastic and solvent resistant.
Claims11
A cross-linkable polymer formed by reacting:
- (1) 2 moles of A--OH
- (2) n+1 moles of Z--R--Z and
- (3) n moles of OH--R'--OH,
- wherein A is selected from the group consisting of ##STR36## or mixtures thereof wherein X is selected from the group consisting of ##STR37## wherein R" is hydrogen or a lower alkyl, wherein Z is selected from the group consisting of fluorine, chlorine, and bromine, wherein R is an aromatic radical, wherein R' is an aromatic radical, and wherein n is selected so that said polymer has a molecular weight between about 1,000 and about 40,000.
A method for making the polymer of claim (1) comprising
- (a) mixing compounds (1), (2), and (3) and a scavenger in a solvent in the presence of an inert atmosphere, and
- (b) heating said mixture to react said compounds.
Dependencies are inferred from the claim text.