# US 4,393,222 A · Tricyclo[6.4.0.0.sup.2,7 ] dodecane-3,6-diphenyl-1,8,4,5-tetracarboxylic acid dianhydrides

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- Number: US 4,393,222 A
- Document ID: US4393222A
- Status: Granted
- Kind: A
- Application number: 06/386,888
- Filed: 1982-06-10
- Granted: 1983-07-12
- Earliest claimed: 1981-08-19
- Assignees: Standard Oil Company (Indiana)
- Inventors: Tayseer S. Nimry; Ellis K. Fields
- Web page: https://patentgrep.com/patent/US4393222A

## CPC

- C08G 73/1042: {Copolyimides derived from at least two different tetracarboxylic compounds or two different diamino compounds}
- C07C 51/567: by reactions not involving carboxylic acid anhydride groups
- C07C 61/135: having three rings
- C07C 61/39: containing six-membered aromatic rings
- C08G 73/10: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS

## Abstract

Novel polyimides, copolyimides and molding compositions are prepared from novel dianhydrides such as tricyclo[6.4.0.0.sup.2,7 ] dodecane-3,6-diphenyl-1,8,4,5-tetracarboxylic acid dianhydride and tricyclo-[6.4.0.0.sup.2,7 ] dodecane-1,8,4,5-tetracarboxylic acid dianhydride. The novel polyimides are useful as engineering plastics. The novel dianhydrides are useful for the preparation of the polyimides. Other dianhydrides can be mixed with our novel dianhydrides to make novel copolyimides useful as engineering plastics.

## Claims

### Claim 1

As a composition of matter the dianhydrides of the following structure: ##STR8## wherein Z is either hydrogen or benzene radical.