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US 5,646,231 AGranted
Rigid-rod polymers
AssigneeMaxdem Incorporated
InventorsMatthew Louis Marrocco, III, Robert R. Gagne, Mark Steven Trimmer
Life of this patent
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Abstract
Rigid-rod and segmented rigid-rod polymers, methods for preparing the polymers and useful articles incorporating the polymers are provided. The polymers incorporate rigid-rod backbones with pendant solubilizing groups attached thereto for rendering the polymers soluble.
Claims26
A soluble rigid rod polymer having repeat units of the formula:
- ##STR13## wherein each R.sub.1, R.sub.2, R.sub.3 and R.sub.4 on each monomer unit, independently, is H or a solubilizing side group, where at least one out of one hundred of the monomer units incorporate a solubilizing side group and wherein the polymer has an intrinsic viscosity of greater than about 3 deciliters/gram when measured at 40.degree. C. in a solvent selected from the group consisting of 0.05M lithium bromide in N-methylpyrrolidinone, N-methylpyrrolidinone, dimethylacetamide, phenylether, m-cresol, sulfuric acid, anisole, 5% N-methylpyrrolidinone/95% CHCl.sub.3, and chlorobenzene.
Dependencies are inferred from the claim text.