Back to results
US 6,184,333 B2Granted
Low-toxicity, high-temperature polyimides
AssigneeMaverick Corporation
InventorRobert A. Gray
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeMaverick Corporation
InventorRobert A. Gray
Estimating the term…
The present invention is directed to polyimide systems which simultaneously offer low toxicity, a high glass transition temperature, excellent thermal oxidative stability, and desirable processing characteristics. These various polyimide systems include mixtures of monomeric reactants, polyimide-precursor reaction products, polyimides, and polyimide-containing articles. In one aspect of the invention, the mixture of monomeric reactants includes at least one dia-nhydride or a derivative thereof, and at least one diamine. The diamine may be 4,4′-[1,4-phenylene-bis(1-methylethylidene)]bisaniline, 4,4′-[1,3-phenylene-bis(1-methylethylidene)]bisaniline, and/or a derivative thereof. The diamine also may include a phenylenediamine, 2,2-bis[4-(4-aminophenoxyl)phenyl]propane, 4,4′(1,4-phenylene-bismethylene)bisaniline, and/or a derivative thereof. In addition, the mixture may include a reactive end-capping agent and/or a non-reactive end-capping agent. Also, if desired, the mixture of monomeric reactants may be a dry mix or a solution. The invention also is directed to articles formed from mixtures of monomeric reactants, articles formed from polyimide-precursor reaction products, and articles formed from polyimides themselves. Non-limiting examples include a powder, a neat resin, a coating, a film, a membrane, a foam, an adhesive, a fiber, a composite, a laminate, a prepreg, a part, and a bushing.
A mixture of monomeric reactants, comprising:
A mixture of monomeric reactants, the monomeric reactants comprising:
A mixture of monomeric reactants, the monomeric reactants comprising:
A mixture of monomeric reactants, the monomeric reactants comprising:
A method of making a mixture of monomeric reactants, comprising the steps of:
A method of enhancing the glass transition temperature (Tg) of a polyimide, the polyimide formed from a mixture of monomeric reactants including at least one dianhydride or a derivative thereof and at least one diamine or a derivative thereof, the monomeric reactants having a total amount of diamine, comprising the step of:
A mixture of monomeric reactants, comprising:
A mixture of monomeric reactants, comprising:
A mixture of monomeric reactants, the monomeric reactants comprising:
Dependencies are inferred from the claim text.