Abstract Epoxidized aromatic polyimides and processes for their preparation are provided. The epoxidized polyimides are prepared by reacting a diamine of the formula WHEREIN Ar is a divalent aromatic organic radical, Ar'' is a tetravalent aromatic organic radical and N IS A POSITIVE INTEGER OF AT LEAST 1, WITH 1 TO 4 MOLES OF AN EPOXY COMPOUND (SUCH AS EPICHLOROHYDRIN) OF THE FORMULA WHEREIN X is halogen and R'' is hydrogen or a hydrocarbon radical of 1 to 6 atoms. The reaction is conducted in the presence of an organic or inorganic base at a temperature between ambient and about 100*C. The epoxidized polyimides can be cross-linked by melt reaction, self-reaction or catalysis depending upon the number of epoxy end-groups.
AN EPOXIDIZED AROMATIC POLYIMIDE HAVING THE FORMULA
Claim 2
Dependent Claim
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AN EPOXIDIZED AROMATIC POLYIMIDE HAVING THE FORMULA
Claim 3
Dependent Claim
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The epoxidized polyimide of claim 1 wherein R'' is hydrogen and n is at least 4.
Claim 4
Dependent Claim
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The epoxidized polyimide of claim 2 wherein Ar is selected from the group consisting of
Claim 5
Dependent Claim
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A PROCESS FOR PREPARING AN EPOXIDIZED AROMATIC POLYIMIDE COMPRISING: REACTING A DIAMINE OF THE FORMULA
Claim 6
Dependent Claim
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A PROCESS FOR PREPARING AN EPOXIDIZED AROMATIC POLYIMIDE COMPRISING: REACTING A DIAMINE OF THE FORMULA
Claim 7
Dependent Claim
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The process of claim 4 wherein the temperature is in the range of between ambient and about 80*C.
Claim 8
Dependent Claim
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The process of claim 5 wherein the base is selected from the group consisting of an alkali metal hydroxide, an alkali metal carbonate, an alkali metal silicate and an organic tertiary amine.
Claim 9
Dependent Claim
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The process of claim 6 wherein Ar is selected from the group consisting of