Rigid-rod polymers
AssigneeMaxdem Incorporated
InventorsMatthew Louis Marrocco, III, Robert R. Gagne, Mark Steven Trimmer
Life of this patent
Estimating the term…
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.
Claims28
A process for lowering the flammability of polymer compositions comprising mixing into said polymer composition an additive comprising a rigid-rod polymer comprising 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 incorporates a solubilizing side group and wherein the polymer has a number average degree of polymerization of at least about 25.
A process for reducing creep in polymer compositions comprising blending or otherwise mixing an additive comprising a rigid-rod polymer comprising repeat units of the formula:
- ##STR14## 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 incorporates a solubilizing side group and wherein the polymer has a number average degree of polymerization of at least about 25 into said polymer composition.
A process for lowering the coefficient of thermal expansion of polymeric compositions comprising blending or otherwise mixing an additive comprising a rigid-rod polymer comprising repeat units of the formula:
- ##STR15## 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 incorporates a solubilizing side group and wherein the polymer has a number average degree of polymerization of at least about 25 with said polymer composition.
A polymeric composition comprising:
- (a) a polymer base;
- mixed together with
- (b) an additive comprising a rigid-rod polymer comprising repeat units of the formula:
- ##STR16## 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 incorporates a solubilizing side group and wherein the polymer has a number average degree of polymerization of at least about 25, for lowering the coefficient of thermal expansion of said polymer base.
A process for increasing the modulus of a polymer composition consisting of blending or otherwise mixing with said polymer composition an additive comprising a rigid-rod polymer comprising repeat units of the formula:
- ##STR17## 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 incorporates a solubilizing side group and wherein the polymer has a number average degree of polymerization of at least about 25.
A process for increasing the toughness of polymer compositions comprising blending or otherwise mixing with said polymer composition an additive comprising a rigid-rod polymer comprising repeat units of the formula:
- ##STR19## 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 incorporates a solubilizing side group and wherein the polymer has a number average degree of polymerization of at least about 25.
A process for increasing the abrasion resistance of a polymer composition comprising blending or otherwise mixing with said polymer composition an additive comprising a rigid-rod polymer comprising repeat units of the formula:
- ##STR20## 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 incorporates a solubilizing side group and wherein the polymer has a number average degree of polymerization of at least about 25.
A composition comprising a rigid-rod polymer comprising repeat units of the formula:
- ##STR21## 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 incorporates a solubilizing side group and wherein the polymer has an intrinsic viscosity of greater than about 1 deciliter/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;
- and a second polymer.
A composition comprising a rigid-rod copolymer comprising monomer units of the formula:
- ##STR22## 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 incorporates a solubilizing side group;
- and a second polymer.
Dependencies are inferred from the claim text.