Polyamide acids and polyesterimides from 1,3-adamantylene-bis-trimellitate dianhydrides
AssigneeStandard Oil Company (Indiana)
InventorsAllen Feinstein, Ellis K. Fields
Life of this patent
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Abstract
Novel dianhydrides derived from trimellitic anhydride and adamantane diacetates are polymerized with a diamine to produce the corresponding polyamide, which is subsequently converted to the polyesterimide by heat treatment at temperatures above 500.degree. F.
Claims8
As a composition of matter, a polyamide acid formed by reacting about equimolar amounts of a dianhydride with a diamine at a temperature below 500.degree. F., said dianhydride having the general formula ##STR4## wherein R.sub.1 and R.sub.2 are individually selected from the group consisting of hydrogen, an alkyl radical, and an aryl radical, and said diamine having the general formula
- H.sub.2 N --R.sub.3 --NH.sub.2
- wherein R.sub.3 is selected from the group consisting of alkylene and arylene groups.
As a composition of matter, the polyamide acid produced by reacting about equimolar amount of 1,3-adamantylene-bistrimellitate dianhydride with 4,4'-diaminodiphenyl ether at a temperature below 500.degree. F.
As a composition of matter, a polyestermide formed by reacting about equimolar amounts of a dianhydride with a diamine and heating the reaction product to a temperature of from 500.degree. F. to 700.degree. F., said dianhydride having the general formula ##STR5## wherein R.sub.1 and R.sub.2 are individually selected from the group consisting of hydrogen, an alkyl radical, and an aryl radical, and said diamine having the general formula
- H.sub.2 N--R.sub.3 --NH.sub.2
- wherein R.sub.3 is selected from the group consisting of alkalene and arylene groups.
As a composition of matter, a polyesterimide formed by reacting about equimolar amounts of 1,3-adamantylene-bistrimellitate dianhydride with 4,4'-diaminodiphenyl ether and subsequently heating the reaction product to a temperature of from 500.degree. F. to 700.degree. F.
Dependencies are inferred from the claim text.