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6562935 |
Thermoplastic aromatic polysulfone resin composition
A thermoplastic aromatic polysulfone resin which is advantageous as a material for use in coating, adhesion, composite material or the like and which has a reduced viscosity (RV) of 0.36 to 0.45...
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6538097 |
Process for production of polyimide powder, polyimide powder, polyimide powder molded bodies and process for their production
A process for production of polyimide powder, which comprises reacting a biphenyltetracarboxylic dianhydride and an aromatic diamine in an amide-based solvent optionally containing a water-soluble...
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6518392 |
Dielectric compositions, preparation thereof, and integrated circuit devices fabricated therewith
A novel dielectric composition is provided that is useful in the manufacture of integrated circuit devices and integrated circuit packaging devices. The dielectric composition is prepared by...
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6500913 |
Polyimides, process for the preparation thereof and use thereof as alignment films for liquid crystal devices
The present invention relates to a novel polyimide of the general formula (1) and a process for the preparation thereof.
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6498224 |
Methods for the preparation poly(etherimide)s
A new method for the synthesis of poly(etherimide)s comprises transimidation of bis(imide) (IV) in the presence of a substituted phthalic anhydride or 4-substituted tetrahydrophthalic anhydride...
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6489431 |
Polyimide precursors and polyimides
A polyimide precursor having a repeating unit represented by the following general formula (1), wherein R 1 contains a bivalent organic group constituting a diamine having a hexafluoropropylidene...
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6489436 |
Polyimide copolymer and metal laminate using the same
Novel polyimide copolymer, which is a copolymer of isopropylidene-bis-(4-phenyleneoxy-4-phthalic acid)dianhydride and 6-amino-2-(p-aminophenyl)benzimidazole or a copolymer of two kinds of...
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6482915 |
Method for producing liquid crystalline polymer
The invention provides a method for producing a thermotropic liquid crystalline polymer of high quality at high yield and in short polymerization time, which method includes polymerizing staring...
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6479615 |
Polyamic acid, polyimide resin obtained therefrom and application thereof to circuit board
The polyamic acid of the invention can be obtained by the reaction of an acid anhydride component comprising pyromellitic anhydride and 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane with...
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6420511 |
Process for the preparation of aromatic polyesters
This invention relates to a process for the preparation of aromatic polyesters which comprises polymerization of a aromatic dicarboxylic acid substituted with a polar group weight percentage in the...
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6417291 |
Process for producing polyarylate
In a process for producing a polyarylate through the polycondensation of an aromatic dihydroxy compound and an aromatic ester bond forming precursor, a salicylic acid ester compound having a...
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6403755 |
Polyesters containing phosphazene, method for synthesizing polyesters containing phosphazenes
A new phosphazene-based polyester macro-molecule is provided, as is a method for producing the macro-molecule.
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6359107 |
Composition of and method for making high performance resins for infusion and transfer molding processes
A composition of and method for making high performance imide resins that are processable by resin transfer molding (RTM) and resin infusion (RI) techniques were developed. Materials with a...
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6359102 |
Biphasic polymerization process
Improvements are disclosed for biphasic polymerization processes in which an aqueous solution of a first monomer that is hydrolytically unstable below a pH of about six or above a pH of about eight...
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6350844 |
Polyimide film and electric/electronic equipment bases with the use thereof
A polyimide film having sufficiently excellent characteristics such as a sufficiently high elastic modulus, a low water absorption, a small coefficient of moisture-absorption expansion, a small...
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6350845 |
Polyimide compositions and novel acid dianhydrides to be used therein
Novel polyimides substituted by a substituent having an alkyl or fluoroalkyl group and having reduced water absorption; a process for producing these novel polyimides; and novel acid dianhydrides...
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6346596 |
Gas barrier polymer composition
A gas barrier polymer composition with active hydrogen functionality is provided. The polymer may be prepared by reacting a solution of organic diacid containing at least one active hydrogen group...
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6335416 |
Polyimide film and process for producing the same
A polyimide film, which is produced from polyamide acid prepared through the reaction of p-phenylenebis(trimellitic acid monoester anhydride), oxydiphthalic acid dianhydride, p-phenylenediamine,...
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6333392 |
Thermosetting amic acid microfine particles, thermosetting imide microfine particles, crosslinked imide microfine particles, and processes for their production
An object of the invention is to provide thermosetting amic acid microfine particles, thermosetting imide microfine particles and crosslinked imide microfine particles of controlled particle shape...
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6307008 |
Polyimide for high temperature adhesive
A polymide useful as an adhesive for semiconductor assemblies having excellent thermal resistance and adhesive strength at high temperatures. The polyimide adhesive is based on the polyimide...
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6303742 |
Polyimide compositions
The present invention provides a novel polyimide composition which includes a cinnamoyl group or a derived cinnamoyl group and has photo-reactivity and heat-reactivity inherent to the cinnamoyl...
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6303744 |
Polyimides and process for preparing polyimides having improved thermal-oxidative stability
Polyimides and the process for preparing polyimides having improved thermal-oxidative stability derived from the polymerization of effective amounts of one or more of the polyamines such as the...
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6303743 |
Polyimide for optical communications, method of preparing the same, and method of forming multiple polyimide film using the polyimide
A polyimide for optical communications, which is expressed by the formula (1), a method of preparing the same, and a method of forming multiple polyimide films using the polyimide, wherein the...
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6288209 |
Method to prepare processable polyimides with reactive endogroups using 1,3-bis(3-aminophenoxy)benzene
Polyimide copolymers were obtained containing 1,3-bis(3-aminophenoxy)benzene (APB) and other diamines and dianhydrides and terminating with the appropriate amount of reactive endcapper. The...
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6281323 |
Terminal-modified imide oligomers and cured products thereof
Terminal-modified imide oligomers with an inherent viscosity of 0.05-1 obtained by reacting 2,3,3',4'-biphenyltetracarboxylic dianhydride, an aromatic diamine compound and...
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6277950 |
Organic-soluble aromatic polyimides, organic solutions and preparation thereof
The present invention provides polyimides and co-polyimides that are organosoluble. The polyimides and co-polyimides are prepared from an aromatic diamine having ortho-linked phenylene and pendant...
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6274699 |
Polyimides and process for preparing polyimides having thermal-oxidative stability
Polyimides and the process for preparing polyimides having improved thermal-oxidative stability derived from the polymerization of effective amounts of one or more of the polyamines such as the...
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6274695 |
Aligning agent for liquid crystal
The present invention relates to a treating agent for liquid crystal alignment, which is an agent for liquid crystal alignment to be used for a method in which polarized ultraviolet rays or...
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6268465 |
Hydrolysis-resistant aliphatic polyester amides, their production and use
An aliphatic polyester amide which is hydrolysis-resistant includes a ternary polycondensation product of monomeric constituents composed of a monomeric constituent A which is at least one diol...
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6265521 |
Method for preparing polyether polymers of predetermined molecular
Polyether polymers such as polyetherimides are prepared by a two-step reaction. The first step is the reaction between an alkali metal salt of a dihydroxy-substituted aromatic hydrocarbon, such as...
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6265520 |
Solvent soluble polyimide and a method for making thereof
Disclosed is a solvent soluble polyimide and a method for making thereof, which characterizes by producing a solvent soluble polyimide with low electric conductivity through the polymerization of...
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6262223 |
Triamine-modified polymides having improved processability and low melt flow viscocity
Addition-cured polyimides that contain the reaction product of an aromatic triamine or trianhydride analogue thereof, a reactive end group such as 5-norbornene-2, 3-dicarboxylic acid, ester...
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6252033 |
Method for the preparation of polyamic acid and polymide useful for adhesives
A method for preparing polyamic acid and polyimide, which is suitable for use in adhesives or adhesive tapes for electronic parts. The polymers have such three-dimensional molecular structures that...
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6235866 |
Slurry preparation of bis (halophthalimides) and of polyether polymers
Bis(halophthalimides) such as, 3-bis[N-(4-chlorophthalimido)]benzene are prepared in slurry in an organic liquid such as o-dichlorobenzene or anisole, by a reaction at a temperature of at least...
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6235868 |
Porphyrinogenic resin systems and polymers derived therefrom
Polymerisable resins which comprise a porphyrinogenic ring system obtained by the reaction of: (a) one or more compounds selected from the group consisting of pyrrole and N-(lower)alkyl pyrroles,...
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6232428 |
Essentially colorless, transparent polyimide coatings and films
Essentially colorless, transparent polyimide coatings and films prepared by combining aromatic dianhydrides with para-substituted aromatic diamines are provided. The polyimide coatings and films...
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6222007 |
Films, preimpregnated tapes and composites made from polyimide "Salt-like" Solutions
High quality films, preimpregnated tape (prepegs) and composites have been fabricated from polyimide precursor "salt-like" solutions. These "salt-like" solutions have a low viscosity (5,000 to...
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6187899 |
Polyamic acid and polyimide microfine particles and process for their production
A process for producing polyimide microfine particles which is amenable to free control of particle morphology and particle diameter distribution is provided. A polyamic acid and a polyimide, each...
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6160081 |
Photosensitive polyimide resin composition
The invention relates to a photosensitive polyimide resin composition comprising (A) a polyamic acid having, in its main chain, repeating units formed from a polycondensation product of at least...
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6156868 |
Methods for preparing polymers from dibasic acids
This invention relates to methods of preparing dibasic acids, such as adipic acid for example, by oxidizing a hydrocarbon with a gas containing an oxidant, preferably oxygen. A respective...
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6117968 |
Interfacial method for preparing copolyestercarbonates
The level of anhydride linkages in copolyestercarbonates is decreased by preparing the copolyestercarbonate interfacially in a two-step method from at least one dihydroxyaromatic compound and at...
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6114494 |
Polyimide material and method of manufacture
A fully imidized cresylic acid soluble polymer comprising 4,4'- oxydiphthalic anhydride (ODPA), 3,4,3',4',-biphenyltetracarboxylic dianhydride (BPDA), 3,4'-oxydianiline (ODA), and 4,4'-oxydianiline...
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6111059 |
Diaminobenzene derivatives, polyimides prepared therefrom, and alignment film for liquid crystals
A diaminobenzene derivative represented by formula (1), and a polyimide obtained by reacting a diamine containing at least 1 mol % of said diaminobenzene derivative, with a tetracarboxylic acid and...
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6103864 |
Composition and process for retarding the premature aging of PMR monomer solutions and PMR prepregs
The polyimides are derived from solutions of at least one low-boiling organic solvent, e.g. isopropanol containing a mixture of polyimide-forming monomers. The monomeric solutions have an extended...
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6096853 |
Synthesis of phenolic monomers containing imide or diimide moieties and high heat carbonate polymers prepared therefrom
A process has been surprisingly discovered that can produce a high heat carbonate polymer (i.e., one with a Tg greater that 150° C.), without the drawbacks encountered in attempts to produce a...
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6087470 |
Preparation of soluble polyamide, polyimide and poly(amide-imide)
The new diamine, "3,3',5,5'-tetramethyl-2,2-bis[4-(4-amino-phenoxy)phenyl]pro
pane" was synthesized and used to prepare high performance soluble engineering plastics by polycondensation. The...
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6087414 |
Process for direct substitution of high performance polymers with unsaturated ester groups
Disclosed is a process which comprises reacting a polymer of the general formula ##STR1## wherein x is an integer of 0 or 1, A is one of several specified groups, such as ##STR2## B is one of...
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6084053 |
Electronic part and process for manufacturing the same
Electronic parts and a process for manufacturing the electronic parts are provided. The electronic parts comprise an electric insulating material exhibiting a high heat resistance and low...
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6080832 |
Low-pretilt alignment layer material
A diamine-containing polyamic acid alignment layer material provided by the polymerization of aromatic diamine and dianhydride, and having an excellent coating, adhesion and stability. After the...
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6069278 |
Aromatic diamines and polyimides based on 4,4'-bis-(4-aminophenoxy)-2,2' or 2,2',6,6'-substituted biphenyl
This invention relates the novel diamines, the polyimide oligomers and the polyimides derived therefrom and to the method of preparing the diamines, oligomers and the polyimides. The thermoplastic...
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