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5496912 |
Thermotropic liquid crystal aromatic polysters
Thermotropic melt processable liquid crystalline aromatic polyesters comprising units derived from a dicarboxylic acid and from a mixture of aromatic diols in which from 50% to 80% is...
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5494997 |
Preparation of by the bischloroformate process of soft segment polycarbonate
A process for preparing a polyestercarbonate copolymer which is nearly devoid of diaryl-carbonates and that exhibits a glass transition temperature lower than bisphenol-A carbonate homopolymer, and...
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5494964 |
Polyesters based on hydroxyl-containing prepolymers of olefinically unsaturated monomers and their use as binders for electrophotographic toners
Polyester resins suitable as binders for electrophotographic toners and for acceptor layers for the thermal diffusion printing process based on hydroxyl-containing prepolymers of olefinically...
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5493003 |
Solutions of polyimide-forming substances and their use as coating materials
Solutions of polyimide-forming substances contain A) polyamines and B) amides and/or esters of tetracarboxylic acids, the amido or ester groups carrying substituents selected from the group...
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5489644 |
Solutions of polyimide-forming coating materials
Solutions of polyimide-forming substances contain A) aromatic or partly aromatic diamines and B) tetraesters of imide-forming aromatic or partly aromatic tetracarboxylic acids or mixtures of...
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5489669 |
Polyimide and process for producing the same
A polyimide represented by the general formula (1): ##STR1## wherein Y represents a hydrocarbon group having 4 to 20 carbon atoms or a sulfur atom; each of R 1 to R 4 , R i and R j represents a...
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5488093 |
Stiff-chain polyesters and a method of preparing them
The description relates to novel liquid-crystalline polyesters containing the following repeating units: A having the formula: ##STR1## and B having the formula ##STR2## The novel polyesters are of...
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5484879 |
Polyimides containing fluorine
Polyimide polymers of the following recurring structure and the corresponding polyamic acids are disclosed: ##STR1## wherein AR 1 is ##STR2## where X is O, S, SO, SO 2 , CO, C(CF 3 ) 2 , C(CH 3 )...
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5480965 |
Readily soluble, amorphous polyimide, and preparation process of same
This invention relates to a novel thermoplastic and amorphous polyimide which is readily soluble in organic solvent, a novel aromatic diamino compound used for the polyimide, a preparation process...
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5478915 |
Polyimide oligomers
Polyimide oligomers are described which comprise the condensation product of: at least one phenylindane diamine and at least one aromatic bis(ether anhydride). The polyimide oligomers of the...
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5478913 |
Melt-processible polyimides with high Tg
Copolyimides from 1,4-bis(4-aminophenoxy)-2-phenylbenzene and m- or p-phenylene diamine with biphenyl dianhydride exhibit a high Tg and reduced melt viscosity.
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5478918 |
Low stress polyimide composition and precursor composition solution of same
A polyimide precursor composition solution includes a tetracarboxylic acid component containing not less than 70 mol % of at least one selected from the group consisting of benzenetetracarboxylic...
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5474854 |
Polyester composition and film made therefrom
The invention is a polyester composition containing crosslinked polymer particles with ester bonds at the main chain. The particles are excellent in affinity to polyesters, and so the films formed...
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5475079 |
(CO) polycarbonate composition and process for preparing the same
A (co)polycarbonate composition mainly comprising a (co)polycarbonate having a limiting viscosity number [η] of 0.2 to 1.0 dl/g and terminal hydroxyl groups in an amount of 20 mole % or below,...
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5473010 |
Polyimide based resin composition
The present invention relates to a polyimide based resin composition comprises 1 to 50 parts by weight of polyetherimide for 100 parts by weight a resin composition comprising 50 to 99 parts by...
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5464923 |
Polymer compositions containing substituted biphenyl pyrazines
The present invention provides novel substituted biphenyl pyrazines or pyrazine derivatives ("BPD") which are functional and have useful application as a monomer for a variety of high performance...
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5463016 |
Granular material of polyimide precursor, mixture comprising the material and process for producing the material
This invention provides (1) a granular material of a polyimide precursor, which has excellent solubility in solvents and excellent moldability and from which a polyimide molding having excellent...
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5461120 |
Transparent thermoplastic molding compositions
A thermoplastic molding composition which has an improved total light transmission value comprising (i) copolyester of ethylene terephthalate and cyclohexane dimethanol and (ii) at least one member...
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5455327 |
Polyimides containing meta-biphenylenedioxy moieties and articles prepared therefrom
Two monomers containing meta-biphenylenedioxy moieties were prepared. One monomer, a diamine, is used to prepare polyimide, polyamide, and epoxy polymers. The other monomer, a dianhydride, was used...
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5455323 |
Reduced TG copolyestercarbonate
A reduced glass transition temperature copolyester-carbonate which displays non-Newtonian melt behavior was synthesized by using bisphenol-A, a dicarboxylic acid and a trisphenol. The branched...
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5453484 |
Copolyimides and a process for the preparation thereof
A diamine compound of the general formula ##STR1## wherein the arrows denote isomerism, R 1 is a divalent aromatic group selected from the group consisting of ##STR2## R 2 is a tetravalent...
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5449741 |
Polyimide optical material
A polyimide optical material, composed of a perfluorinated polyimide having a perfluorinated repeating unit represented by general formula (1) ##STR1## wherein R 1 is a tetravalent perfluorinated...
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5442030 |
Polyimides containing fluorinated aromatic diamine units
Polyimides are made from the novel diamines 1,2-bis(3-aminophenyl)perfluorocyclobutane, 1,2-bis(3- or 4-aminophenyl)perfluorocyclobutene, -cyclopentene and -cyclohexene, by reaction with aromatic...
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5436312 |
Aqueous filler composition
Aqueous filler composition comprising a polyester resin, which is built up of the educts (a), (b), (c), (d) and (e) or their ester-forming derivatives, the sum of the reactants corresponding to 100...
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5436103 |
Modified unsaturated polyesters
Modified unsaturated linear polymers have at least a first residue, a second residue and an acid residue. The first, second and acid residues correspond to a first, second and acid monomers used to...
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5434240 |
Poly (imide-ethers)
Disclosed herein are novel poly(imide-ethers) containing ortho substitution in the main chain of the polymer. These polymers are made from novel aromatic bis-carboxylic anhydrides which contain two...
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5432249 |
Liquid crystalline polyesters
The present invention provides a novel liquid crystalline polyester comprising structural units represented by the following general formulae A, B, C and D: ##STR1## where X and Y are each...
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5428102 |
Low dielectric polyimides
A series of polyimides based on the dianhydride of 1,4-bis(3,4-dicarboxyphenoxy)benzene (HQDEA) or on 2,2-bis[4(3-aminophenoxy)phenyl]hexafluoropropane (3-BDAF) are evolved from high molecular...
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5422415 |
Polyether polyol and polyurethane compositions protected against oxidation and core scorching
Described are compositions protected against thermal and oxidative degradation that comprise A) a polyether polyol or mixtures of such polyols, B) at least one benzofuranone derivative of...
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5416187 |
Process for the preparation of phenol-functional polyester resins
This invention provides an improved process for preparing phenol-functional polyester resins which are useful in thermosetting coating compositions. The process involves a polycondensation reaction...
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5412062 |
Thermally depolymerisable polyoxalate or polymalonate polymers containing hydrocarbon groups with 6-30 carbon atoms and a tertiary carbon atoms attached to bridging oxygen atom
Thermally depolymerizable polyoxalate and polymalonate polymers which contain hydrocarbon groups having from 6 to 30 carbon atoms and a tertiary carbon atom attached to at least one of the bridging...
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5412066 |
Phenylethynyl terminated imide oligomers
Four phenylethynyl amine compounds--3 and 4-aminophenoxy-4'-phenylethynylbenzophenone, and 3 and 4-amino-4'-phenylethynylbenzophenone--were readily prepared and were used to endcap imide oligomers....
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5409989 |
Resin composition for toners
A resin composition for toners, composed essentially of a suspension polymerizate of: (a) 5 to 40% by weight per total polymer of a polyester comprising at least one aromatic diol component an at...
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5407752 |
Polyester resin
A polyester resin comprising units of a dicarboxylic acid component composed mainly of an aromatic dicarboxylic acid or its ester forming derivative and a diol component composed mainly of ethylene...
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5407981 |
Method for the preparation of copolyester elastomer having high viscosity
A method for preparation of a polyether-ester elastomer. The method comprises admixturing dibasic acid with short chain diol for the formation of a short chain ester monomer represented :into...
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5408347 |
Polyester based liquid-crystal display device
A liquid-crystal display device having a liquid-crystal layer held between a pair of substrates each having a transparent electrode and an alignment film formed successively on the inner surface,...
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5405932 |
Oil-soluble, phenolic resin-modified natural resinic acid esters, processes for their preparation and their use as self-gelling printing ink resins
Oil-soluble, phenolic resin-modified natural resinic acid esters, which are able to form self-gelling mineral oil solutions and in the form of gel varnishes can advantageously be used as binder...
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5399658 |
Gamma-radiation-resistant polycarbonate composition
A gamma radiation-resistant polycarbonate-disulfide resin is disclosed. The incorporation of disulfide linkages in the structure of polycarbonate was found to enhance the resistance of the resin to...
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5399656 |
Aromatic polyesters and a method for producing the same
An aromatic polyester superior in heat resistance and mechanical properties and satisfactory in lightness and color tone is provided. The aromatic polyester has resorcinol structure, has the...
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5399664 |
Second order nonlinear optical polyimide polymer with high temperature stability
The invention relates generally to polymers exhibiting second order nonlinear optical properties, and characterized by high thermal stability. Disclosed are polymers prepared by a polycondensation...
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5395918 |
Organo-soluble polyimides from substituted dianhydrides
The invention describes new biphenyl dianhydrides, and new polyimides and copolyimides made from the dianhydrides. The synthesized polyimides exhibit significantly enhanced solubility when the...
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5393864 |
Wet-etchable random polyimide copolymer for multichip module applications
A random polyimide copolymer, based on a rigid dianhydride, a rigid diamine and an additional diamine and/or dianhydride containing one or more flexibilizing linkages. Soft-baked coatings of the...
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5391688 |
Liquid crystalline polyesters
It is intended to provide a liquid crystalline polyester whose orientation in the state of liquid crystal can be easily immobilized as glass phase and which is suitable for application to optical...
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5391689 |
Aromatic polyester and polyester resin composition
A novel wholly aromatic polyester capable of forming an anisotropic melt phase is provided. Such polyester has been demonstrated to be capable of forming quality molded articles having a...
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5386002 |
Fluorene based bisimides and thermoplastic polymers thereof
Polyetherimides, polyesterimides, poly(ester etherimides) and poly(carbonate imides) which are thermoplastic, polymeric materials contain divalent bisimides of formula ##STR1## wherein R is...
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5384390 |
Flame-retardant, high temperature resistant polyimide fibers and process for producing the same
There are disclosed flame-retardant, high temperature resistant polyimide fibers of the general formula ##STR1## wherein n is an integer larger than 1, A is a tetravalent aromatic group and R is at...
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5380814 |
Aromatic polycarbonate and process for production thereof
A process for producing an aromatic polycarbonate by reacting an aromatic dihydroxy compound, an alkali or alkaline earth metal base and a carbonyl halide compound comprises feeding a...
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5380590 |
Water-dispersible aromatic polyester, aqueous dispersion thereof and polyester film coated therewith which permits fast adhesion
A water-dispersible aromatic polyester comprising a dicarboxylic acid component and a glycol component, wherein (A) at least 95 mol% of the dicarboxylic acid component is composed of an aromatic...
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RE34820 |
Amideimide sizing for carbon fiber
Sizing for carbon fibers with uncapped or capped linear polyamideimides. The uncapped linear polyamideimides useful as carbon fiber sizings generally contain repeating units having the general...
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5374708 |
Formed polyimide article
Polyimide filaments and polyimide films having great strength, high elastic modulus and high crystallinity and comprising a novel polyimide which can be melt-processed without impairing high...
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