United States of America As Represented by the Administrator of Nasa

Croda International, Inc.

Theodorus Jacobus Dingemans

Terry L St Clair

Erik S Weiser

Angela Leonarda Maria Smits

Remco Benjamin Van Triet

Jeffrey A Hinkley

Santiago Juan Garcia-Espallargas

Polyimide formed from at least one dianhydride and at least one diamine, wherein at least 50 wt. % of the diamine is comprised of dimer fatty diamine, and a process of making the polyimide. The dianhydride is preferably a tetracarboxylic acid in which carbonyl groups are attached in pair to adjacent carbon atoms, and the dimer fatty diamine may be formed from a corresponding dimer fatty acid, especially the dimerisation products of Cto Cfatty acids such as oleic acid, linoleic acid, linolenic acid, palmitoleic acid, and elaidic acid. Also polyimide pre-polymer being polyamic acid formed by reaction of the dinhydride, and diamine comprised of dimer fatty diamine. The polyimide may be formed in to coatings, adhesives, or polymer films, said compositions in particular being self-healing.

Polyimide composition

The benefits of liquid crystal polymers and polyetherimides are combined in an all-aromatic thermoplastic liquid crystalline polyetherimide. Because of the unique molecular structure, all-aromatic thermotropic liquid crystal polymers exhibit outstanding processing properties, excellent barrier properties, low solubilities and low coefficients of thermal expansion in the processing direction. These characteristics are combined with the strength, thermal, and radiation stability of polyetherimides.

Wholly aromatic liquid crystalline polyetherimide (LC-PEI) resins

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Leiden, Netherlands

Theodorus Jacobus Dingemans