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7084233 |
Aromatic polycarbonate, process for producing the same, polycarbonate composition, and hollow container obtained from the same
A subject for the invention is to provide a branched aromatic polycarbonate which is excellent in hue and in melt characteristics such as melt strength. The invention provides a branched aromatic...
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7084235 |
Method of producing highly condensed polyester granulate
Latent heat crystallized polyesters and copolyesters of a degree of crystallization greater than 38% and made by a process in which, without prior additive admixtures and without further cooling,...
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7081509 |
Method for producing highly functional, hyper branched polyester by means of enzymatic esterification
The present invention relates to a process for preparing highly functional hyperbranched polyesters which comprises reacting a reaction solution comprising solvent and
(a) one or more dicarboxylic...
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7078477 |
Process for producing solvent-soluble polyimide
In the process of the present invention, a solvent-soluble polyimide is produced by polycondensing at least one tetracarboxylic acid component with at least one diamine component in a solvent in...
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7074882 |
Polyimide resin for electrical insulating material
The present invention provides a polyimide resin for an electrical insulating material which comprises a polyimide resin having a repeating unit represented by general formula (I):
wherein R 1 ...
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7074879 |
Polyester process using a pipe reactor
There are disclosed polyester processes using a pipe reactor and corresponding apparatuses. In particular, there are disclosed processes and corresponding apparatuses including an esterification...
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7074880 |
Polyimide aerogels, carbon aerogels, and metal carbide aerogels and methods of making same
A preparation process of polyimide aerogels that composed of aromatic dianhydrides and aromatic diamines or a combined aromatic and aliphatic diamines is described. Also descried is a process to...
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7071282 |
Benzimidazole diamine-based polyetherimide compositions and methods for making them
Disclosed herein are polyetherimide compositions comprising structural units of the formula:
derived from at least one benzimidazole diamine, wherein R 1 and R 2 are independently selected...
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7067083 |
High refractive index thermoplastic polyphosphonates
High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A...
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7063892 |
Aromatic liquid-crystalline polyester and film thereof
An aromatic liquid-crystalline polyester having a small dielectric loss in a wide frequency region is provided. An aromatic liquid-crystalline polyester is provided that can manufacture a film...
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7064176 |
Coating material for electronic components
The invention relates to novel polyhydroxyamide compounds that, in the form of their oxazoles, ane suited as a coating material, particularly for electronic components. The invention also relates...
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7056493 |
Radio-opaque polymer biomaterials
Iodinated and/or brominated derivatives of aromatic dihydroxy monomers are prepared and polymerized to form radio-opaque polymers. The monomers may also be copolymerized with other dihydroxy...
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7053168 |
Method for preparing polyimide and polyimide prepared thereby
A method for preparing a polyimide includes introducing a mixture of an oligomer and a solvent to an extruder, removing solvent via at least one extruder vent, and melt kneading the oligomer to...
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7045214 |
Method for recycling optical disk, resin composition for forming film, and resin molded article
A method for recycling an optical disk includes crushing a recovered optical disk without further treatment into chips that are used as a raw material of a resin composition for forming a film. The...
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7041779 |
Rigid-rod benzobisazole polymers incorporating naphthalene-1,5-diyl structure units
A benzobisazole polymer having repeating units of the formula:
wherein Q is
and wherein Z is —O—, —S— or —NH—. A new method for preparing 1,5-naphthalenedicarboxylic acid from...
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7041773 |
Polyimide sulfones, method and articles made therefrom
Polyimide sulfone resins are provided with a glass transition temperature of from 200–350° C., residual volatile species concentration of less than 500 ppm and a total reactive end group...
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7041778 |
Processable thermally stable addition polyimide for composite applications
A novel polyimide resin consisting essentially of 3,3′,4,4′-benzophenonetetracarboxylic dianhydride (BTDA), 3,4,3′,4′-biphenyltetracarboxylic dianhydride (BPDA), 2,2 bis...
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7026436 |
Low temperature polyimide adhesive compositions and methods relating thereto
The present invention relates to a polyimide adhesive composition having a polyimide derived from an aromatic dianhydride and a diamine component, where the diamine component is preferably about 50...
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7022810 |
Proton exchange membrane materials for the advancement of direct methanol fuel-cell technology
A new class of hybrid organic-inorganic materials, and methods of synthesis, that can be used as a proton exchange membrane in a direct methanol fuel cell. In contrast with Nafion® PEM materials,...
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7022809 |
Polyimides for anchoring liquid crystals, display devices including same and method for the preparation of said devices
The present invention relates to novel polyimides derived from 6FDA and from 3,3-dihydroxy-4,4′-diaminobiphenyl and novel polyimides derived from PMDA and from Bis-AP-AF, having alkyl, arylalkyl,...
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7019103 |
Polyamic acid oligomer, polyimide oligomer, solution composition, and fiber-reinforced composite material
A terminal-crosslinkable polyamic acid oligomer having 1) heat resistance indicated by Tg of 300° C. or more and a pyrolysis temperature of 500° C. or more, 2) toughness, and 3) capability of...
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7014791 |
Liquid crystalline polymer composition
Liquid crystalline polymer having repeat units derived from 4,4′-biphenol, terephthalic acid, 2,6-naphthalenedicarboxylic acid, and 4-hydroxybenzoic acid in a limited compositional range have...
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7014921 |
Aromatic liquid-crystalline polyester
An aromatic liquid-crystalline polyester with good moldability into a film is provided. The resulting film has small dielectric loss. The polyester comprises repeating units represented by formulae...
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7015304 |
Solvent free low-melt viscosity imide oligomers and thermosetting polyimide composites
This invention relates to the composition and a solvent-free process for preparing novel imide oligomers and polymers specifically formulated with effective amounts of a dianhydride such as...
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7005497 |
Liquid-crystalline polyester production method
A liquid-crystalline polyester production method with a shortened reaction time and improved productivity per unit time by using an organic basic compound containing one nitrogen atom in a molecule...
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6984712 |
Liquid-crystal polyester resin
The present invention provides a liquid-crystalline polyester resin which comprises monomer units derived from 2-hydroxy-3-naphthoic acid and/or 2-hydroxynaphthalene-3,6-dicarboxylic acid in an...
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6979721 |
Substituted cyclohexene endcaps for polymers with thermal-oxidative stability
This invention relates to polyimides having improved thermal-oxidative stability, to the process of preparing said polyimides, and the use of polyimide prepolymers in the preparation of prepregs...
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6962965 |
Functionalized poly(arylene ether) composition and process
A functionalized poly(arylene ether) having a pendant carbon—carbon double bond is prepared by reacting the hydroxy end group of a poly(arylene ether) with a polyisocyanate compound to produce a...
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6961185 |
Microlens array
A microlens array having a resin layer forming convex lenses, wherein the resin layer comprises a cured product of a polycarbodiimide resin represented by formula:
wherein R represents a...
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6949619 |
Phenolic hydroxyl-bearing polyimide resin, making method and polyimide resin composition
A polyimide resin having phenolic hydroxyl radicals in its skeleton is prepared using a diamine bearing an aromatic ring having an amino radical attached thereto and another aromatic ring having a...
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6930164 |
Telechelic ionomeric polyester and method of preparation thereof
A method of preparing a telechelic ionomeric polyester includes reacting a first diol with a sulfoaromatic carboxylic acid salt to form a sulfoaromatic carboxylate ester salt, and reacting the...
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6927274 |
Resin compositions, processes for preparing the resin compositions and processes for forming resin films
Polyimide precursors contained in resin compositions of the present invention have a polymer structure unit represented by formula (1) below:
wherein chemical structure A 2 includes an...
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6924348 |
Polyamide acid and polyimide, and optical material
A polyimide excelling in heat resistance, chemical resistance, water repellency, dielectric characteristics, electrical characteristics, and optical characteristics and a polyamide acid useful as...
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6919418 |
Approach to reduce cyclics formation in 3-CIPA based polyetherimide polymers
Methods of reducing the amount of undesirable cyclic oligomer by-products in the production of polyetherimides are disclosed. The resulting polyetherimides have enhanced thermomechanical properties.
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6919422 |
Polyimide resin with reduced mold deposit
A polyimide composition and a process to prepare polyimide resins with reduced plate out and mold deposits is described. During resin molding operations the low plate out resins show a longer...
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6916898 |
Process for producing polyimide
A process of preparing a polyimide of the present invention comprises effecting an imidization reaction of a diamine and a tetracarboxylic dianhydride in a solvent containing 50 to 100% by weight...
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6903242 |
Method for dehalogenation treatment of halogen containing non-combustible resin composition
A dehalogenation treatment method of a halogen-containing flame-retardant resin composition has a step of bringing the halogen-containing flame-retardant resin composition into contact with a...
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6897282 |
Compositions comprising functionalized polyphenylene ether resins
The invention relates to a method of forming a polyphenylene ether resin containing residual aliphatic unsaturation. A polyphenylene ether is reacted with a capping agent in a solvent to form the...
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6891067 |
Optical polyimide precursor, optical polyimide compound and fabricating method thereof
The present invention provides an optical polyimide precursor for use in making a polyimide. The precursor is defined by the following formula:
wherein X is Cl, Br, oxo-halide, or fully...
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6890626 |
Imide-benzoxazole polycondensate and process for producing the same
A polyimide-based polycondensate which may be used as an insulation film by coating a copper foil with the polycondensate and by heating the coated copper foil, which insulation film does not warp...
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6887580 |
Adhesive polyimide resin and adhesive laminate
An adhesive polyimide resin which comprises a siloxane polyimide resin obtained from (A) an aromatic tetracarboxylic dianhydride and (B) a diamine ingredient comprising (B1) a diamine having a...
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6887967 |
Thermosetting polyimide resin composition process for producing polyimide resin, and polyimide resin
A thermosetting polyimide resin composition is provided which comprises a polyimide resin and an epoxy resin, which has excellent heat resistance, low dielectric constant and low dielectric loss...
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6881785 |
Dispersions of amorphous unsaturated polyester resins based on particular Dicidol isomers
An aqueous dispersion based on an amorphous unsaturated polyester resin obtained by polycondensing a mixture of Dicidol isomers and one or more saturated and/or unsaturated dicarboxylic acids.
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6881815 |
Method for the preparation poly(etherimide)s
A method for the synthesis of poly(etherimide)s comprises the reaction of 4-halotetrahydrophthalic anhydride with an activating primary amine to yield an activated 4-halotetrahydrophthalimide....
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6867280 |
Process for producing aromatic liquid crystal polyester
A process for producing an aromatic liquid crystal polyester comprising reacting an aromatic diol, an aromatic hydroxycarboxylic acid, or an aromatic diol and aromatic hydroxycarboxylic acid with...
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6864348 |
Polyetherpolyamide elastomer having low water absorption
Polyetherpolyamide elastomer showing a low water absorption, a high stress relaxation, and a high elastic recovery percentage of elongation is obtainable by polymerizing an aminocarboxylic acid...
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6861482 |
Weatherable, thermostable polymers having improved flow composition
The present invention describes the incorporation of several types of soft-block materials into resorcinol phthalate-co-polycarbonate polymers. In preferred embodiments, the soft-block materials...
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6861497 |
Polyimides having an unusually low and tunable electrical resistivity useful for electrical and optical applications
A polyimide is disclosed of the formula:
CG1 and CG2 are independently electron-accepting and/or electron-donating groups; x is an integer from about 3 to about 3000; ODAH is any of a...
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6852826 |
Manufacturing method of polyamic acid, and polyamic acid solution
In a step of polymerizing polyamic acid by mixing tetracarboxylic acid dianhydride and diamine and polycondensating the tetracarboxylic acid dianhydride and diamine under the presence of a...
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6852828 |
Poly amic acid system for polyimides
A poly amic acid precursor containing a combination of tetrahydrofuran and N-methylpyrrolidinone as cosolvents is described. Utilizing the combination of tetrahydrofuran and N-methylpyrrolidinone...
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