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7605222 |
Copolyetherimides
Copolyetherimides compositions having high glass transition temperatures and outstanding ductility are presented. The copolyetherimides having M w of at least 40,000 comprising isomeric...
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7563850 |
Polyelectrolyte compositions
An inexpensive and durable polyelectrolyte composition includes both an aromatic polymer containing carbonyl linkages and/or sulfonyl linkages in the backbone chain and bearing cation-exchange...
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7538175 |
Phenolic hole transport polymers
A polymer having hole transport functionality and antioxidant properties is disclosed. The polymer comprises a phenolic segment and a hole transport segment. The polymer is suitable for use in the...
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7507771 |
Ion conductive copolymers containing one or more hydrophobic oligomers
In one aspect, the invention provides ion conductive copolymers comprising (1) a plurality of first oligomers, (2) a plurality of second oligomers, (3) ion conductive monomers and (4) linking...
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7407609 |
Membranes and their manufacture
Membranes comprising an aromatic ether ketone polymer (e.g. polyetherketone) in sheet or hollow fibre form are made by preparing at least a 12 wt % solution of the polymer in a solvent which is...
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7393914 |
Polyethersulfone compositions
Novel polyethersulfone compositions have been discovered which incorporate structural subunits derived from sulfonated bis(halophenyl)sulfones, dihydroxy terphenyls, and/or...
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7307138 |
Polymer electrolytes and process for their preparation
A sulfonated aromatic polyether ketone of the formula (II)
[Ar—O—Ar′—CO—Ar′—O—Ar—CO—Arâ
€³â€”CO—] ...
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7202324 |
Perfluorostyrene compound, and coating solution and optical waveguide device using the same
Disclosed is a fluorine compound having perfluorostyrene introduced at a terminal thereof, as represented in the following Formula 1, and a coating solution and an optical waveguide device using...
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7186454 |
Dielectric films and materials therefor
A material for dielectric films is a polymerizable composition containing an organic solvent, and an adamantanepolycarboxylic acid derivative represented by following Formula (1):
wherein X is...
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7169878 |
Diamines, polyimide precursors and polyimides produced by using the diamines, and liquid crystal aligning agents
A diamine compound represented by the formula (1):
wherein R 1 is a trivalent organic group, each of X 1 and X 2 is a bivalent organic group, X 3 is an alkyl or fluoroalkyl group having...
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7148314 |
Process for preparation of functionalized polyimides
A method for preparation of a sulfonic and or sulfonic acid salt containing polyimide resins comprising melt reaction of a polyimide resin with an organic compound, wherein the organic compound...
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7129318 |
RTM and RI processable polyimide resins
Polyimide resins that are suitable for processing by resin transfer molding (RTM) and resin infusion (RI) methods at reduced processing temperatures are provided. The inventive RTM and RI...
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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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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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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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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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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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7030206 |
Polymer electrolyte and proton-conducting membrane
To provide a sulfonic acid group-containing polymer having improved hot water resistance and radical resistance (durability), a solid polymer electrolyte including the polymer, and a...
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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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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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7001606 |
Biocidal polymers based on guanidine salts
The invention relates to biocidal polymers based on guanidine salts characterized in that they are representatives of a number of polyoxyalkylene guanidines and their salts and are a product of a...
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6998464 |
Method for producing a solution consisting of a polymer containing recurrent azole units, solutions produced according to said method and use of the same
The present invention relates to a method of preparing a solution of a polymer comprising recurring azole units, which comprises dissolving a sufficiently dried polymer comprising recurring azole...
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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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6956098 |
High modulus polyimide compositions useful as dielectric substrates for electronics applications, and methods relating thereto
The substrates of the present invention comprise a polyimide base polymer derived at least in part from collinear monomers together with crankshaft monomers. The resulting polyimide material has...
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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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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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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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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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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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6911519 |
Low viscosity melt processable high temperature polyimides
A series of low melting and low viscosity phenylethynyl end-capped polyimides (PETIs) possessed of long term thermal and mechanical stability useful as films, melt coatings, adhesives, matrix and...
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6908685 |
Polyimide film, method of manufacture, and metal interconnect board with polyimide film substrate
The invention provides a polyimide film manufactured from a polyamic acid prepared from pyromellitic dianhydride in combination with 10 to 60 mol % of phenylenediamine and 40 to 90 mol % of...
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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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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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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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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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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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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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6849706 |
Copolyetherimides
Copolyetherimides comprise phthalimide structural units comprising both 3- and 4-linkages, wherein the designations 3-linkage and 4-linkage refer to the isomeric positions on the phthalimide ring...
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6828353 |
Ion-exchange polymers
Ion-Exchange polymers for a polymer electrolyte membrane include a moiety of formula (I), and/or a moiety of formula (II), and/or a moiety of formula (III) wherein at least some of the units I, II...
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6808818 |
Fusible polyimide and composite polyimide film
A fusible polyimide showing a fusion endothermic peak in a differential scanning calorimeter has a recurring unit of the following formula (1): in which Ar 1 is a mixture of residues of...
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6793987 |
Photoalignment materials and liquid crystal display fabricated with such photoalignment materials
An aromatic polyamide photoalignment material prepared by a reaction from a diamine compound with a side branch and a photosensitive dicarboxylic acid. Furthermore, liquid crystal display devices...
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6790930 |
Process for producing polyimide resin
The present invention provides a method for easily producing a high-molecular weight polyimide resin at high yield by drying and heating a mixture mixed by material monomers of polyimide.
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6784276 |
High-solids polyimide precursor solutions
This invention is a highly concentrated stable solution of polyimide precursors (monomers) having a solids content ranging from about 80 to 98 percent by weight in lower aliphatic alcohols i.e....
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6780960 |
Method of making a polyimide in a low-boiling solvent
A method of making a solution of a polyimide from a diamine monomer and a dianhydride monomer is disclosed. A solution or slurry of one of the monomers in a solvent that boils at a temperature...
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