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7459518 |
Thermoplastic polyimide composition
A thermoplastic polyimide composition, comprising a silane-modified polyimide (A); and a polar solvent (B), wherein the silane-modified polyimide (A) is obtained by reacting a polyimide (a) and an...
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7361727 |
Copolymerization of 1,4-dioxan-2-one and a cyclic ester monomer producing thermal stabilized 1,4-dioxan-2-one (co)polymers
A polymerization process to derive a thermal-stabilized poly(1,4-dioxan-2-one) and cyclic ester monomer copolymer using a coordination-insertion catalyst/initiator. 1,4-dioxan-2-one and cyclic...
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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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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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7105211 |
Liquid crystal aligning agent, liquid crystal aligning films, and liquid crystal display devices
A liquid crystal alignment treating agent for optical alignment treatment, whereby it is possible to obtain a liquid crystal alignment film which presents a high and stable tilt angle of liquid...
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7090900 |
Liquid crystal aligning agent for vertical alignment, alignment layer for liquid crystal, and liquid crystal displays made by using the same
A liquid crystal alignment treating agent containing a polyamic acid which is represented by the following formula (I) and exhibits a reduced viscosity of from 0.05 to 5.0 dl/g (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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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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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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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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6984714 |
Siloxane-modified polyimide resin
This invention relates to a siloxane-modified polyimide resin which shows excellent adhesiveness and can be bonded by thermocompression at high temperature even after subjection to thermal...
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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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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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6949618 |
Polymer compound, precursor for the same and thin film-forming method using the same polymer precursor
Provided are polyimide and a thin film thereof which have a three-dimensional structure and therefore are excellent in a mechanical strength and a heat resistance as compared with those of...
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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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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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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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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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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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6824642 |
Phenyl-linked oxazole cyanates as dielectrics having good adhesive and filling properties
The following invention relates to phenyl-linked polybenzoxazoles having terminal, aryl- or heteroaryl-attached cyanate groups which can be used for adhesive bonding and as dielectrics, especially...
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6818726 |
Polymers from hydroxyalkyl amino triazines and polyfunctional compounds
Polymers are prepared from A) 60 to 95 percent by weight of a mixture including A1) 20 to 70 percent by weight of hydroxyalkyl amino triazines and A2) 30 to 80 percent by weight of...
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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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6777525 |
Heat, moisture, and chemical resistant polyimide compositions and methods for making and using them
Polyimides having a desired combination of high thermo-oxidative stability, low moisture absorption and excellent chemical and corrosion resistance are prepared by reacting a mixture of compounds...
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6770733 |
Polyimide copolymer
A film-formable polyimide copolymer, which comprises two kinds of tetracarboxylic acid dianhydride consisting of (A) pyromellitic acid dianhydride and (B) 3,3′,4,4′-benzophenonetetracarboxylic...
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6750317 |
Material and additive for highly crosslinked chemically and thermally stable polyhydroxyamide polymers
Polyhydroxyamides are polymerized to form highly-crosslinked, temperature-stable polymers. The polyhydroxyamides include as their central, parent structure a benzenetricarboxylic acid to which side...
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6740371 |
Diaminobenzene derivative, polyimide obtained therefrom, and liquid-crystal alignment film
An alkyldiamine having excellent polymerization reactivity, a polyimide comprising it as a constituting element, and a liquid crystal alignment film excellent in uniformity of liquid crystal...
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6737503 |
Aromatic diamine and polyimide thereof
The aromatic diamine compound of the present invention is represented by the following formula (1), and from the aromatic diamine compound a polyimide having a repeating unit represented by the...
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6737502 |
Method of synthesizing polyimides
A solvent-free, catalyst-free and contamination-free method of synthesis of polyimides is disclosed. The method includes polymerizing a diamine with 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane...
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6734276 |
Polyimide and circuit substrate comprising the same
The invention is a polyimide, random copolymer having repeating units of the formula (1): wherein R 1 and R 2 each represent a divalent group selected from and R 1 and R 2 may be the same...
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6713597 |
Preparation of polyimide polymers
A process for the preparation of a reactive friable polyimide powder comprises dissolving an aromatic dianhydride and an organic diamine in a high-boiling, aprotic organic solvent to form a...
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6710160 |
Polyamic acid, polyimide, process for producing these, and film of the polyimide
Disclosed are a polyamic acid having repeating units represented by the formula (1): wherein the norbornane skeleton of comprises four components of and their contents satisfy the following:...
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