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5609315 |
Thermal blanket joining tape
Two opaque sheets made from the same electrically conductive polymer material have adjoining edges. Each sheet is carbon loaded, electrically conductive, opaque black polymer on a first broad side...
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5608033 |
Liquid crystal alignment film
A liquid crystal alignment film made of a polyimide which has, on its side chain, a benzene or biphenyl ring substituted by a monovalent substituent having a positive value as the σp value under...
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5606014 |
Imide oligomers and co-oligomers containing pendent phenylethynyl groups and polymers therefrom
Controlled molecular weight imide oligomers and co-oligomers containing pendent phenylethynyl groups (PEPIs) and endcapped with nonreactive or phenylethynyl groups have been prepared by the...
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5604041 |
Method of making free-standing polyimide film
Disclosed is a method of making a free-standing polyimide film. A solution is prepared of a polyamic acid 20 to 98% imidized in an organic solvent and a coating of the solution is applied to a...
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5601905 |
Laminate for insulation protection of circuit boards
A laminate comprising at least two layers of a photosensitive resin layer and a polyimide precursor resin layer; a process for formation of an insulating protective layer using a laminate which...
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5599897 |
Aromatic polycarbonate, a method for producing the same, and a plastic optical waveguide using the same
There is provided an aromatic polycarbonate obtained by reacting a carbonate precursor substance with a dihydric phenol comprising mainly 2,2-bis(4-hydroxyphenol)-1,1,1,3,3,3-hexafluoropropane...
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5596435 |
Liquid crystal display device
A liquid crystal display device comprising a liquid crystal cell including a pair of substrates each having an alignment film on the surface thereof, and a liquid crystal filled in a space between...
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5591530 |
Flexible optically uniform sign face substrate
Flexible optically uniform sign face substrate comprising at least one layer of durable thermoplastic sheeting and an optically uniform dimensionally stable scrim film, and more particularly a sign...
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5587452 |
Polyamide-imide
The invention relates to a polyamide-imide containing recurring units according to the formula ##STR1## where Y is an arylene group, and R and R' are alkylene groups, in which at least 50 mole %...
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5582886 |
Polyimide composite tube and method of manufacturing the same
A seamless polyimide composite tube which includes a polyimide layer, a conductive primer layer on the surface of the polyimide layer and a fluororesin layer on the surface of the primer layer and...
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5580950 |
Negative birefringent rigid rod polymer films
A class of soluble polymers having a rigid rod backbone, which when used to cast films, undergo a self-orientation process whereby the polymer backbone becomes more or less aligned parallel to the...
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5578372 |
Heat-weldable composite films and method of production thereof
Composite films have a layer structure comprising a base film, and a coating layer containing a vinylidene chloride polymer, a laminating agent layer composed of a polyisocyanate component and a...
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5578697 |
Polyimide precursor, bismaleimide-based cured resin precursor and electronic parts having insulating members made from these precursors
A polyimide precursor having a molecular structure obtained by polymerizing (a) 0.97 to 1.03 molar equivalent of a diamine component containing 0.40 molar equivalent or more of aromatic diamine...
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5578696 |
Heat resistant adhesive film, an adhesion structure, and method of adhesion
A heat-resistant adhesive film, an adhesion structure obtained using the same, and an adhesion method using the same are disclosed, the film comprising a polyisoimide resin containing at least 40...
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5578360 |
Thin film reinforcing structure and method for manufacturing the same
The invention relates to a reinforcing structure for a thin film, particularly for an ultrathin film permeable to X-ray and ultraviolet radiation, and a method for manufacturing a reinforcing...
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5573846 |
Polyfluorocarbon coated metal bearing
A maintenance-free sliding bearing composed of a metal support and a layer which is directly applied thereto and which consists of a copolymer of ethylene-tetrafluoroethylene forming an...
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5573854 |
Composites made from multidimensional oligomers
Multidimensional oligomers of the present invention are surprisingly useful for advanced composites because each generally has a use temperature greatly in excess of its curing temperature. The...
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5570506 |
Method for forming multilayer wiring construction
Low-thermal-expansivity polyimides have a linear rigid skeleton, so that adhesion between perfectly cured low-thermal-expansivity polyimide films is very low. On the other hand, a film of a...
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5571595 |
Magnetic recording medium and method for production thereof
A magnetic recording medium having a magnetic metal thin film as a magnetic layer is disclosed. An oxide layer is formed on the surface of the magnetic metal thin film, and a proactive layer is...
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5567800 |
Imide oligomers endcapped with phenylethynyl phthalic anhydrides and polymers therefrom
Controlled molecular weight phenylethynyl terminated imide oligomers (PETIs) have been prepared by the cyclodehydration of precursor phenylethynyl terminated amic acid oligomers. Amino terminated...
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5562993 |
Semiconductor device with identification information
A semiconductor device comprising a substrate having an individual identification information recorded on the surface thereof, wherein the substrate comprises a metal foil and the individual...
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5560978 |
Basecoat for a coating system
A basecoat for a nonstick coating system wherein the basecoat comprises a high temperature binder resin, preferably polyamideimide resin, and a filamentary powder, preferably a nickel powder, which...
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5549863 |
Composite board
A method of making a composite board comprising (a) applying a layer of a first composition comprising a thermosetting resin and a catalyst therefor to the surface of a mould; (b) allowing the...
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5549946 |
Varnish-coated heat-resistant roll for copying machine, and method of producing the same
A heat-resistant roll for copying machine use which comprises a metallic roll having a surface which has been coated with a varnish containing polybenzimidazole as a major resin component, followed...
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5545467 |
Paper additive for hot-pressed forms and hot-pressed forms using it
Inorganic or organic particles have been used in the past as paper additives for hot-pressed forms to impart the pattern of granite thereto, but when these are boiled in hot water, for example, an...
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5543222 |
Metallized polyimide film containing a hydrocarbyl tin compound
A vacuum metallized polyimide film comprising an aromatic polyimide layer containing a hydrocarbyl tin compound in oxidation states (II) or (IV) as an additive and a metal plated layer bonded...
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5535980 |
Multilayer injection mold having improved surface properties
Articles such as molds for thermoplastics, having an insulating layer preferably of resin deposited on the metal core materials, have a second layer of metal suspended in resin deposited on said...
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5536584 |
Polyimide precursor, polyimide and metalization structure using said polyimide
A metalization structure uses a surface protective film formed of a polyimide that is produced by heating and dehydrating polyimide precursor has its molecular chain composed of recurring units...
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5527621 |
Method for surface treatment of polyimide resin molded articles
The surface of a polyimide molded article such as polyimide film is treated with a solution containing a basic compound, further treated with a solution containing a silane coupling agent and then...
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5525405 |
Adhesiveless aromatic polyimide laminate
An aromatic polyimide laminate having a thickness of at least 50 microns composed of multiple aromatic polyimide film layers containing from 400 to 10,000 ppm of tin, superimposed on and directly...
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5525644 |
Potted electrical components and methods of making the same
This invention relates to an article comprising a potted electrical component in a structure, wherein the electrical component is potted in a polyimide composition. The invention also relates to a...
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5523137 |
Adhesive paper for tape automated bonding
An adhesive tape for TAB having an organic insulating film, an adhesive layer formed on the organic insulating film and a protection layer formed on the adhesive layer, the adhesive layer being any...
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5520845 |
Poly(2,6-piperazinedione) alignment layer for liquid crystal displays
A poly(2,6-piperazinedione) liquid crystal alignment film providing high voltage holding ratio and high tilt angle when used in active matrix and super twisted nematic liquid crystal displays.
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5514449 |
Multi-chip substrate
An interconnect substrate comprising a metal-polymer composite incorporating microelectronic circuitry, which interconnect substrate is characterized by the feature that the polymer comprises...
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5514444 |
Fiber reinforced polyimide honeycomb for high temperature applications
The present invention provides plastic-based fiber-reinforced honeycomb, and a process for its preparation. The fiber-reinforced honeycomb has high temperature durability yet can be fabricated and...
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5514466 |
Plastic optical articles
A plastic optical article wherein a transparent coating film is applied on a transparent three-dimensional cross-linked resin having a glass transition temperature of at least 130° C. The article...
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5510168 |
Magnetic recording medium and magnetic recording method
A magnetic recording medium comprises a support and provided thereon, a magnetic recording component layer which comprises an uppermost layer containing a ferromagnetic metal powder and a binder, a...
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5510395 |
Film forming solution, porous film obtained therefrom and coated material with the porous film
A film forming solution which does not require aprotic polar solvents, a porous film of poly(4,4'-oxydiphenylenepyromellitimide) obtained from the film forming solution which has excellent heat and...
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5510425 |
Polyimides, thermosetting resin compositions containing the polyimides, formed articles of the resin compositions, and production process of the polyimides
A polymide comprises structural units represented by the following formula: ##STR1## wherein Ar is a group consisting of 10-90 mole % of a first specific structural sub-unit and 90-10 mole % of a...
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5506021 |
Substrate plate for the manufacture of a mold for the production of optical registration carriers and a method for manufacturing same
A substrate plate of plastic material instead of glass for the manufacture of a metal mold for the production of optical registration carriers of plastic material. Polyether imide is a suitable...
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5506060 |
Method for making multidimensional ether or ester oligomers
Crosslinkable, polyaromatic, polyether or polyester oligomers can have glass transition temperatures above 900° F. while exhibiting desirable toughness for aerospace applications and ease of...
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5501911 |
Copper crystal film coated organic substrate
A copper film coated substrate includes a substrate and a copper film formed on a surface of the substrate. The copper film has an X-ray diffraction intensity of 2.0 cps/nm or more per unit film...
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5501884 |
Diamino compounds and their production method and liquid crystal alignment layers using the compounds
The present invention is to provide diamino compounds useful to polyamide raw materials for production of liquid crystal alignment layers having excellent voltage holding ratios without development...
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5502157 |
Copolyimides prepared from ODPA, BTDA and 3,4'-ODA
A copolyimide was prepared by reacting 3,4'-oxydianiline (3,4'-ODA) with a dianhydride blend comprising, based on the total amount of the dianhydride blend, about 67 to 80 mole percent of...
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5500279 |
Laminated metal structure and metod of making same
The laminate of the invention is provided with an etch stop to protect the laminate's adhesive layer. The etch stop also circumvents any etching interference due to degradation products which would...
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5498458 |
Spiral cores for stress skin structures and the like and the method of making the same
A spiral core comprises successive convolutions of a rigidifying layer which are spaced with respect to each other and maintained in a spiral spaced relationship. Preferably, a spiral insulation...
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5496641 |
Plastic lens
A plastic lens formed by laminating, in the order as described below, (A) a plastic lens substrate having a refractive index in the range of 1.50 to 1.70, (B) a primer layer containing a metal...
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5496639 |
Poly(arylene ether imidazole) surfacing films for flat and parabolic structures
Films of thermoplastic poly(arylene ether imidazole)s (PAEI)s are used as surface modifiers for neat resin panels and composite resin panels. The PAEI polymer contains imidazole groups along the...
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5496915 |
Polyimides based on diamines containing cycloaliphatic units
Polyimides are obtainable by reacting a dianhydride component with a diamine component, at least one diamine containing cycloaliphatic units, with the proviso that the dianhydride component is a...
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5491013 |
Static-dissipating adhesive tape
An electrostatic dissipating packaging tape is disclosed that comprises a transparent substrate, a substantially transparent adhesive layer on one surface of the substrate, and a clay coating on...
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