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Denki Kagaku Kogyo Kabushiki Kaisha Patents
Assignee:
Denki Kagaku Kogyo Kabushiki Kaisha
Address:
Tokyo, JP
No. of patents:
297
Patents:


1 2 3 4 5 6


Patent Number Title Of Patent Date Issued
RE36140 Two-part adhesive March 9, 1999
A two-part adhesive consisting of a first liquid comprising 100 parts by weight of a polymerizable vinyl monomer and from 0.1 to 20 parts by weight of an organic peroxide and a second liquid comprising 100 parts by weight of a polymerizable vinyl monomer and from 0.05 to 15 parts by weig
RE33905 Chromium carbide sintered body April 28, 1992
A chromium carbide sintered body having high toughness contains 99.5 to 50% by weight of chromium carbide and 0.5 to 50% by weight of AlN. The sintered body contains acicular crystals of chromium carbide.
7459020 Cement admixture, cement composition, and cement concrete made therefrom December 2, 2008
A cement admixture of a low environmental load type, capable of reducing hexavalent chromium, having a small slump loss or heat of hydration, hardly neutralized and capable of suppressing autogenous shrinkage to a low level; a cement composition; and cement concrete employing it, are
7455896 Electronic component container November 25, 2008
A carrier tape body having an embossed tape continuously having pockets which contain an electronic component sealed with a cover tape, where the cover tape has a peeling static electrification amount of from -9 to +9 nC when the cover tape has a surface resistivity of at least 10.sup.11
7429408 Method for preparing calcium aluminate film containing oxygen radical and laminate September 30, 2008
C.sub.12A.sub.7 containing oxygen radicals at a high concentration, is provided at a low cost. A method for preparing an oxygen radical-containing calcium aluminate film, characterized in that it comprises subjecting a powder of oxygen radical-containing calcium aluminate to thermal
7417002 Boron carbide based sintered compact and method for preparation thereof August 26, 2008
A boron carbide based sintered body having a four-point flexural strength of at least 400 MPa and a fracture toughness of at least 2.8 MPam.sup.1/2, which has the following two preferred embodiments. (1) A boron carbide-titanium diboride sintered body obtained by sintering a mixed po
7393898 Block copolymer composition July 1, 2008
To provide a block copolymer composition having a good balance in transparency and impact resistance, and particularly having an excellent impact resistance, by making a molded product of injection molding under high sear condition in such a manner as to hardly generate anisotropy. A
7390563 Conductive polypropylene resin foam sheet and receptacle June 24, 2008
An electroconductive polypropylene type resin foamed sheet comprising a polypropylene type resin foamed sheet, and an electroconductive coating material layer and, preferably, a resin layer, formed on at least one side of the foamed sheet, and having a density of at least 180 kgm.sup.-3
7385005 Polyvinylacetal resin and process for producing the same June 10, 2008
A polyvinylacetal resin powder with a low metal content, being excellent in transparency, moisture resistance and electrical insulating properties and having a large specific surface area, and a process for its production, are presented. A polyvinylacetal resin powder obtained by rea
7364778 Container for an electronic component April 29, 2008
A container for an electronic component made of a resin, wherein when the container and an electronic component contained in the container are rubbed 20,000 times, a static electrification voltage of at most 2,000V by the absolute value on the surface of the electronic component is g
7355853 Module structure and module comprising it April 8, 2008
A module is provided that has high reliability in the junction between a ceramic circuit board and a heat sink, undergoes small changes in shape and warp of a module structure comprising a ceramic circuit board and a metal heat sink event under a temperature history during power module
7341793 Transparent heat-sealing film March 11, 2008
A heat-sealing film having a haze of not more than 30% and having a sealant layer made of a resin composition which comprises from 50 to 100 wt % of the total of the following components (a) to (c): (a) from 5 to 50 wt % of a block copolymer of from 50 to 95 wt % of a styrene-type
7261840 Electroconductive resin composition August 28, 2007
An electroconductive resin composition useful for packaging an electronic device, is provided, whereby a drawback that carbon black is likely to fall off from the surface of a molded product by abrasion, has been overcome. It is an electroconductive resin composition which comprises at
7214745 Process for producing polymer May 8, 2007
A process for producing an olefin polymer with high polymerization activity without using an expensive co-catalyst or using a limited amount of the co-catalyst, more particularly a process for producing a high molecular weight (co)polymer with high polymerization activity even at a h
7214634 Layered product May 8, 2007
A laminated product is provided which has no problems concerning hygienic safety or environment accompanying the use of solvent-based adhesives and which has been tenaciously bonded in a degree equal or superior to that attainable with conventional CR solvent-based adhesives. The laminat
7207105 Method for producing an integral ceramic circuit board April 24, 2007
A substrate for mounting an electronic component, includes a baseplate having a main surface formed with or without a recess. A ceramic substrate is provided on the main surface of the baseplate and has a smaller size than the baseplate. A metal layer is provided to cover both of the
7199187 Sheet April 3, 2007
A sheet excellent in mechanical performance such as folding endurance is provided. A sheet having a substrate layer using an impact-resistant styrene type resin containing 2 to 15 wt % of rubber particles having a peak at less than 2 .mu.m and an impact-resistant styrene type resin c
7189462 Block copolymer, its composition and film made of it March 13, 2007
It is to provide a block copolymer and its copolymer composition which provides a heat shrinkable (multilayer) film with less spontaneous shrinkage while maintaining favorable low temperature shrinkability, and a heat shrinkable (multilayer) film containing the block copolymer.By usi
7182999 Inorganic staple fiber accumulation for holding material, process for producing the same and hol February 27, 2007
An aggregate with small fiber deterioration even after being held under compression under heating at about 1,000.degree. C. for a long term, and a holding material of e.g. a catalyst carrier of a catalyst converter or a honeycomb body of DPE employing it, are provided. An inorganic short
7164191 Low relative permittivity SiO.sub.x film including a porous material for use with a semiconducto January 16, 2007
A low relative permittivity SiO.sub.x film excellent in heat resistance without using an alkali metal, fluorine, etc., a method for modifying an SiO.sub.x film to accomplish a further reduction of the relative permittivity of the low relative permittivity SiO.sub.x film and further t
7130174 Integral-type ceramic circuit board and method of producing same October 31, 2006
A substrate for mounting an electronic component, including a baseplate having a main surface formed with or without a recess. A ceramic substrate is provided on the main surface of the baseplate and has a smaller size than the baseplate. A metal layer is provided to cover both of th
7112367 Tape for tying electric wire September 26, 2006
In consideration of that burning a PVC-based tape causes occurrence of dioxine, a nonhalogenated tape having physical properties and electric properties, which are comparable to a PVC-based tacking tape, and replaceable to the PVC-based tacking tape is desired. Simple replacement of
7105320 Process for producing hyaluronic acid or its derivative September 12, 2006
It is to provide a method for producing hyaluronic acid or a hyaluronic acid derivative which is a simple preparation method as compared with a cockscomb extraction method or a fermentation method which has conventionally been employed industrially, and with which isolation and purif
7097900 Sheet and electronic component packaging container August 29, 2006
In order to prevent static electricity impairment of an electronic component, a layer at the surface of a container to be in contact with an electronic component is one having a relatively high surface resistivity, a layer having a higher electrical conductivity than that is laminated
7084516 Surface protection film August 1, 2006
A surface protection film which comprises a substrate layer and an adhesive layer, and of which the electrostatic charge by peeling from an adherend is from +0.01 to -0.01 nC/mm.sub.2.
7073201 Aqueous Adhesive July 11, 2006
A two part aqueous adhesive comprising a main agent containing a polychloroprene latex as a main component and a curing agent, the main agent and the curing agent being separated during storing or transporting.
7056986 Ethylene-acrylic copolymer rubber composition June 6, 2006
An ethylene-acrylic copolymer rubber composition, which comprises (A) a carboxyl group-containing ethylene-acrylic copolymer rubber, (B) at least one monoamine compound selected from the group consisting of a primary amine, a secondary amine and a tertiary amine, (C) a guanidine type
7030186 Chloroprene latex composition, and method for its production and adhesive composition employing April 18, 2006
A chloroprene latex composition wherein the gel content of the chloroprene polymer is from 3 to 40 wt %, and the weight average molecular weight of the sol content is at least 400,000, and a chloroprene latex is presented which is excellent in the initial adhesive performance and normal
7022794 Process for producing olefin/aromatic vinyl copolymer April 4, 2006
An olefin/aromatic vinyl compound copolymer which is excellent in transparency and which satisfies flexibility and heat resistance simultaneously can be produced by carrying out polymerization in such a manner that at least one of conditions: (a) the polymerization is carried out to
7019076 Transparent rubber-modified copolymer resin and resin composition containing the same March 28, 2006
The invention provides a rubber-modified copolymer resin which is excellent in transparency, impact resistance and rigidity and which has little dependency of the transparency on molding conditions, and a rubber-modified copolymer resin composition which has the above characteristics
7017755 Large coating lump removing device March 28, 2006
Rear ends of pushing rods 40 are axially connected to a support base 50, which is movably engaged with guide rails 60. A drive unit 70 is disposed to rotatably move wire belts 74 between wheels 73 and 71 at longitudinal front and rear ends of the guide rails 60, and the support base 50 i
7014896 Packaging container for electronic part March 21, 2006
An electronic component packaging container which comprises a multilayer polyester sheet having a base layer comprising a polyethylene terephthalate type resin and a polycarbonate type resin and a surface layer comprising a polycarbonate type resin, formed on at least one side of the
7014860 Hyaluronic acid gel, process for producing the same, and medical material containing the same March 21, 2006
Production of a hyaluronic acid gel, which comprises keeping hyaluronic acid in water at a hyaluronic acid concentration of at least 5 wt % in the presence of an acid component in an amount at least equimolar with the carboxyl groups in the hyaluronic acid.
6984681 Method for producing a carboxyl group containing rubber January 10, 2006
A method for producing a carboxyl group-containing rubber having good vulcanization characteristics and exhibiting good resistance to scorching, continuously and in good yield.A method for producing a dry rubber from a polyvinyl alcohol-containing latex of a carboxyl group-containing
6960390 Resin composition, molded product thereof and electroconductive sheet November 1, 2005
An electroconductive sheet comprising a substrate layer of a thermoplastic resin comprising an acrylonitrile-butadiene-styrene copolymer type resin and/or a polystyrene type resin and having laminated on at least one side of the substrate layer, a surface layer of an electroconductive re
6903499 Electron gun and a method for using the same June 7, 2005
An electron gun includes an electron emission cathode, a control electrode, and an extractor and the electron emission cathode is made of rare earth hexaboride. A tip of the electron emission cathode is located between the control electrode and the extractor, and the electron emission su
6902795 Transparent heat-sealing film June 7, 2005
A heat-stealing film having a baze of not more than 30% and having a sealant layer made of a resin composition which comprises from 50 to 100 wt % of the total of the following components (a) to (c); (a) from 5 to 50 wt % of a block copolymer of from 50 to 95 wt % of a styrene-type h
6893583 Flame-retardant curable resin composition and flame-retardant curable adhesive composition May 17, 2005
A flame-retardant curable resin composition which comprises (1) a polymerizable vinyl monomer having a glass transition temperature of its homopolymer of at most 0.degree. C., (2) a polymerization initiator, (3) a reducing agent and (4) a flame retardant in an amount of from 25 to 75
6891004 Transition metal catalyst component for polymerization, and method for producing a polymer by me May 10, 2005
A transition metal catalyst component for polymerization, composed of a metal complex comprising specific ligands and a specific substituted boron group and having a bridging group, which exhibits a very high activity for an olefin type (co)polymerization or an olefin-aromatic vinyl comp
6878779 Cross-copolymerized olefin/aromatic vinyl compound/diene copolymer and process for its productio April 12, 2005
A highly uniform vinyl compound polymer-cross-copolymerized olefin/styrene/diene copolymer excellent in processability, mechanical properties, high temperature properties, compatibility and transparency, and its composition and a process for its production, are provided. This copolym
6875507 Resin composition, polyvinyl chloride fibers and process for producing the same April 5, 2005
A polyvinyl chloride fiber which comprises a composition having 100 parts by weight of a vinyl chloride resin, from 3 to 20 parts by weight of a chlorinated vinyl chloride resin having a chlorine content of from 57.0 to 62.0% and an average polymerization degree of from 550 to 750, and f
6841261 Block copolymer, composition thereof, and film made thereof January 11, 2005
It is to provide a block copolymer and its copolymer composition which provides a heat shrinkable (multilayer) film with less spontaneous shrinkage while maintaining favorable low temperature shrinkability, and a heat shrinkable (multilayer) film containing the block copolymer. By using
6840996 Cement composition January 11, 2005
A cement composition of an environmental impact reducing type, used in the field of civil engineering and construction, which provides initial strength-development equal to that of ordinary Portland cement and which can reduce the clinker calcination amount, is provided. A cement com
6803422 Cross-copolymerized olefin/aromatic vinyl compound/diene copolymer and process for its productio October 12, 2004
A highly uniform vinyl compound polymer-cross-copolymerized olefin/styrene/diene copolymer excellent in processability, mechanical properties, high temperature properties, compatibility and transparency, and its composition and a process for its production, are provided. This copolym
6790461 Hyaluronic acid gel, method of its production and medical material containing it September 14, 2004
A gel made of hyaluronic acid alone which is hardly soluble in a neutral aqueous solution and which keeps its shape for at least one day in a neutral aqueous solution at 25.degree. C.
6759130 Resin composition, molded product thereof and electroconductive sheet July 6, 2004
An electroconductive sheet comprising a substrate layer of a thermoplastic resin comprising an acrylonitrile-butadiene-styrene copolymer type resin and/or a polystyrene type resin and having laminated on at least one side of the substrate layer, a surface layer of an electroconductive re
6723936 Active energy ray-curing adhesive composition and keypad for a push-button switch April 20, 2004
An active energy ray-curing adhesive composition is provided that has high curing rate as well as excellent adhesion and bonding workability, and a keypad (11) for push-button switches that has not only high bonding rate of a hard resin keytop (20) to a base portion (12) but also has exc
6638538 Hyaluronic acid gel composition, process for producing the same, and medical material containing October 28, 2003
A hyaluronic acid gel composition comprising hyaluronic acid and a polymer, which is substantially unmodified with a chemical cross-linking agent or a chemical modifying agent and which has a percentage dissolution of hyaluronic acid of 50% or lower in 12 hours in a neutral aqueous solut
6635267 Hyaluronic acid gel, process for the preparation thereof and medical materials containing the sa October 21, 2003
A gel made of hyaluronic acid alone which is hardly soluble in a neutral aqueous solution and has fluidity enough to be easily ejectable from an injector.
6630215 Medical Device October 7, 2003
A medical material and a medical device comprising an aromatic vinyl compound/.alpha.-olefin random copolymer according to the present invention, are materials which contain substantially no chlorine and which have not only excellent flexibility, transparency and proper resilience bu
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