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Nippon Zeon Co. Ltd. Patents
Assignee:
Nippon Zeon Co. Ltd.
Address:
Tokyo, JP
No. of patents:
589
Patents:


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Patent Number Title Of Patent Date Issued
RE31322 Process for producing sulfur-curable acrylic rubbers July 26, 1983
A process for producing a sulfur-curable acrylic rubber is provided which comprises radical-copolymerizing (1) an alkyl acrylate with (2) an alkenyl acrylate or methacrylate, or radical-copolymerizing (1) an alkyl acrylate, (2) an alkenyl acrylate or methacrylate, (3) an alkoxyalkyl acry
7357973 Flat plate and light guide plate April 15, 2008
A flat plate made of a cycloolefin polymer comprising at least 30% by weight, based on the cycloolefin polymer, of repeating units (A) having an alicyclic structure. The repeating units (A) comprises at least 30% by weight, based on the repeating units (A), of repeating units (A-i) havin
6927255 Rubber composition August 9, 2005
A rubber composition comprising (i) an incompatible polymer blend of at least two diene rubbers selected from rubbers containing a conjugated diene and, optionally, an aromatic vinyl monomer and forming two polymer phases (A) and (B), and (ii) 0.1 to 20 parts by weight, based upon 100
6883938 Lighting equipment April 26, 2005
A lighting equipment comprising a reflector having a substrate comprised of a thermoplastic resin containing an alicyclic structure on which is formed a reflecting layer having a reflectance of at least 70%. The reflecting layer of the reflector is preferably comprised of a metal. The re
6835440 Light transmitting plate December 28, 2004
A light guide plate of the present invention is characterized by being obtained by melt molding a thermoplastic resin having a melt flow rate of at least 50 [g/10 min.] under a load of 2.16 kgf at 280.degree. C.The thermoplastic resin is preferably a thermoplastic resin containing an ali
6828007 Flat plate and light guide plate December 7, 2004
A flat plate made of a cycloolefin polymer comprising at least 30% by weight, based on the cyclopolefin polymer, of repeating units (A) having an alicyclic structure. The repeating units (A) comprises at least 30% by weight, based on the repeating units (A), of repeating units (A-i) havi
6770222 Polymerization-inhibiting composition, polymerization inhibitor and method for inhibiting polyme August 3, 2004
The invention relates to a polymerization inhibitor comprising at least one compound (a) selected from the group consisting of a compound having an NO radical in its molecule and a precursor compound capable of forming an NO radical, and a phosphorus-containing compound (b), wherein a we
6746809 Toner for development of electrostatic image and production process thereof June 8, 2004
A toner for development of electrostatic images which has a residual polymerizable monomer content lower than 70 ppm and is substantially spherical as demonstrated by the flowability of at least 55%, and a process for producing a toner reduced in residual polymerizable monomer conten
6743851 Polyimide film June 1, 2004
A polyimide resin composition comprising a polyimide resin (A) and at least one 1H-tetrazole (B) selected from the group consisting of 1H-tetrazole, 5,5'-bis-1H-tetrazole, and derivatives thereof, and having an excellent rust preventing effect on copper and copper alloys.
6734248 Pattern forming process using polyimide resin composition May 11, 2004
A polyimide resin composition comprising a polyimide resin (A) and at least one 1H-tetrazole (B) selected from the group consisting of 1H-tetrazole, 5,5'-bis-1H-tetrazole, and derivatives thereof, and having an excellent rust preventing effect on copper and copper alloys.
6730736 Alicyclyc structure-containing resin composition May 4, 2004
An alicyclic structure-containing resin composition comprising an alicyclic structure-containing resin (A) having a polar group in a proportion of 3 to 50 mol % based on the whole repeating unit in the resin, and a soft polymer (B), a varnish containing the resin composition, a sheet for
6713154 Insulating material containing cycloolefin polymer March 30, 2004
An insulating material comprising a cycloolefin polymer, specifically, an interlayer insulating material for a high-density assembly board having interlayer-connecting via holes at most 200 .mu.m in diameter, comprising a cycloolefin polymer containing at least 50 mol % of a repeating un
6682797 Contamination resistant cyclic olefin container January 27, 2004
A container comprising a body made of a thermoplastic resin and a lid made of a thermoplastic resin, characterized in that at least one of the body and the lid is molded from a thermoplastic cyclic olefin resin. Said container hardly causes contamination of the content therein with water
6656153 Balloon catheter December 2, 2003
A balloon catheter of the present invention has an outer tube having a first lumen inside it. At the distal end of the outer tube is connected the proximal end of the balloon portion so that a balloon space is formed inside it, the distal end of the balloon portion is joined to a cyl
6652773 High gel-content polymer dispersed in a high-boiling organic medium November 25, 2003
A polymer dispersion composition obtained by dispersing an electrode active material and a polymer having a gel content of 50% or more in an organic dispersion medium of which boiling point at 760 mmHg is 80.degree. C. or above. The composition is successfully usable as, for instance, a
6649315 Nonmagnetic one component developer and developing method November 18, 2003
A non-magnetic one-component developer comprising a substantially spherical polymerized toner which contains at least a binder resin and a colorant and has features that the volume average particle diameter is 5 to 10 .mu.m, the proportion of particles having a particle diameter of at mo
6633722 Light guide plate with alicyclic resin October 14, 2003
A light guide plate which is made of a polymeric resin having an alicyclic structure and has recesses for reflection formed on a light reflecting surface, the recesses being so arranged that the density of the recesses increases with the distance from a light source. Each recess is prefe
6632664 Avian infectious herpesvirus recombinants and recombinant vaccines prepared with the use of the October 14, 2003
An avian infectious recombinant herpesvirus is prepared by inserting a foreign gene, in particular a heterologous antigen gene, into an insertion site in an untranslated genetic region in the genome. A chicken vaccine comprising such a recombinant virus is also provided.
6573004 Binder containing vinyl alcohol polymer, slurry, electrode, and secondary battery with nonaqueou June 3, 2003
A binder for an electrode of a non-aqueous electrolyte secondary battery comprising a vinyl alcohol polymer having 30 to 95% by weight of recurring units expressed by the following formula (1): ##STR1##A slurry containing this binder, an active material and a liquid medium is used to
6562535 Toner for development of electrostatic image May 13, 2003
A toner for development of electrostatic images, comprising at least a binder resin, a colorant and a charge control agent, wherein the charge control agent contains a positive charge control resin (A) composed of a polymer having a weight average molecular weight of 1,000 to 100,000 and
6544706 Polymerized toner and production process thereof April 8, 2003
A polymerized toner of a core-shell structure, comprising colored polymer particles which contain a colorant, and a polymer layer which covers each of the colored polymer particles, wherein the polymerized toner has the following features: (a) the gel content being 60 to 95% as measur
6525144 Norbornene polymer and production process February 25, 2003
A norbornene polymer comprising a repeating unit derived from a norbornene monomer having a cyclic hydrocarbon structure (I) derived from the norbornene ring which constitutes at least a part of the main chain, another cyclic hydrocarbon structure (II), which shares one carbon-carbon
6511756 Thermoplastic dicyclopentadiene-base open-ring polymers, hydrogenated derivatives thereof, and p January 28, 2003
A thermoplastic dicyclopentadiene ring-opening polymer obtained by ring-opening polymerization of a monomer component containing a dicyclopentadiene monomer, characterized in that polycyclic rings which are repeating units of the polymer are bonded in cis-position relative to the car
6503223 Balloon catheter January 7, 2003
A balloon catheter provided with a first tubular member in which at least one balloon lumen is formed inside along a longitudinal direction thereof; a balloon unit which is communicated internally with the balloon lumen formed in the first tubular member and capable of being expanded by
6500899 Resin composition comprising vinyl cyclic hydrocarbon polymer December 31, 2002
A molded or formed product obtained by molding or forming a resin composition comprising (A) at least one vinyl cyclic hydrocarbon polymer selected from the group consisting of hydrogenated products of aromatic vinyl polymers, vinylcyclohexene polymers or hydrogenated products thereo
6498215 Resin composition comprising vinyl cyclic hydrocarbon polymer and a compound having an alcoholic December 24, 2002
A molded or formed product obtained by molding or forming a resin composition comprising (A) at least one vinyl cyclic hydrocarbon polymer selected from the group consisting of hydrogenated products of aromatic vinyl polymers, vinylcyclohexene polymers or hydrogenated products thereo
6497939 Flat plate and light guide plate December 24, 2002
A flat plate made of a cycloolefin polymer comprising at least 30% by weight, based on the cyclopolefin polymer, of repeating units (A) having an alicyclic structure. The repeating units (A) comprises at least 30% by weight, based on the repeating units (A), of repeating units (A-i) havi
6492443 Norbornene polymer composition December 10, 2002
A norbornene resin composition comprising 100 parts by weight of a thermoplastic norbornene polymer and 1 to 150 parts by weight of a thermosetting resin.
6489385 Highly saturated nitrile copolymer rubber, process for the production thereof, heat-resistant ru December 3, 2002
A highly saturated nitrile group-containing copolymer rubber having a Mooney viscosity lowered by 15 points or more by applying a high shearing force thereto in the presence of an aging inhibitor, which has a Mooney viscosity of 5-35 and a weight average molecular weight/number average
6486262 Molding material for plastic lens November 26, 2002
A molding material for plastic lenses, comprising a hydrogenated product of an aromatic vinyl polymer, wherein the hydrogenated product of the aromatic vinyl polymer has properties that the hydrogenation rate of aromatic rings is at least 97%, the weight average molecular weight (Mw)
6472082 Modified thermoplastic norbornene polymer and process for the production thereof October 29, 2002
A modified thermoplastic norbornene polymer obtained by graft-modifying a thermoplastic norbornene polymer selected from a ring-opening polymer of a norbornene monomer or a hydrogenated product thereof with at least one unsaturated compound selected from the group consisting of unsaturat
6440628 Tones for development of electrostatic image and production process thereof August 27, 2002
A toner for development of electrostatic images comprising carbon black as a colorant, wherein the carbon black has the following features: (1) the primary particle diameter being within a range of 28 to 60 nm; (2) the DBP oil absorption being within a range of 40 to 75 ml/100 g; and (3
6436598 Polymerization toner and process for producing the same August 20, 2002
A polymerized toner of a core-shell structure that colored polymer particles containing a colorant are covered with a polymer layer, wherein the polymerized toner has features that (1) the content of tetrahydrofuran-insoluble matter is 60 to 95 wt. %, and (2) the weight average molec
6433102 Hydrogenated polymers, resin composition, and process for producing substrate for information-re August 13, 2002
A hydrogenated product of an aromatic vinyl polymer, wherein the hydrogenation rate of the aromatic rings thereof is at least 97%, a ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) is at most 2.0, the weight average molecular weight
6413378 Apparatus for separation and purification of saturated hydrocarbon and method for separation and July 2, 2002
An extractive distillation tower 4 supplied with a feedstock containing butadiene and a solvent and for distilling the feedstock to separate and purify the butadiene. The tower 4 includes sensors 32, 34 for detecting concentrations of specific impurities other than butadiene; a sensor fo
6410653 Highly saturated carboxylated nitrile copolymer rubber and process for the production thereof June 25, 2002
The invention relates to a carboxylated nitrile group-containing copolymer rubber having the following physical properties:(a) the acid equivalent being at least 1.times.10.sup.-4 ephr,(b) the ratio of [peak height of a carboxylic acid anhydride group]/([peak height of the carboxylic acid an
6403846 Fluorinated, saturated hydrocarbons June 11, 2002
A composition containing less than 95 mol % of a trihydrofluorinated saturated hydrocarbon represented by the following formula (I)(wherein R.sub.1 represents a carbon chain in which CHF and CH.sub.2 are bound, and Rf.sub.1 and Rf.sub.2 are bound to each other to form a ring by a perfluo
6403289 Developer for photosensitive polyimide resin composition June 11, 2002
The invention relates to a developer for photosensitive polyimide resin compositions, comprising an alkaline aqueous solution containing a basic compound (A) represented by a formula (1): ##STR1##wherein X.sup.+ is N.sup.+ or P.sup.+, R is an alkyl group having 1 to 20 carbon atoms o
6395953 Process for preparing purified conjugated diene May 28, 2002
Processes for producing a purified conjugated diene comprise feeding a petroleum fraction containing the conjugated diene to an extractive distillation column, feeding an extraction solvent to the extractive distillation column, and extractive-distilling the conjugated diene from the
6395940 Method for producing perhalogenated cyclopentene May 28, 2002
The invention relates to a method for producing a first perhalogenated cyclopentene represented by the general formula: C.sub.5 Cl.sub.B F.sub.8-B where B is an integer of from 0 to 7. The method includes a step of (a) fluorinating a second perhalogenated cyclopentene by hydrogen flu
6395700 Process for the preparation of compounds having -CH2-CHF-groups May 28, 2002
Compounds each having a --CH.sub.2 --CHF-- group and a number of carbon atoms of 4 or above are prepared by hydrogenating a compound having a --CCl.dbd.CF-- group and a number of carbon atoms of 4 or above in the presence of a noble metal catalyst in a liquid or gas phase. The compound
6388015 Rubber composition, electric wire coating material, and electric wire May 14, 2002
A rubber composition comprising (A) a rubber ingredient comprised of (a) a nitrile group-containing highly saturated copolymer rubber having an iodine value of not larger than 120, preferably a hydrogenated product of an unsaturated nitrile-conjugated diene copolymer rubber, and (b) an
6372856 Process for producing dip-formed rubber article April 16, 2002
A dip-formed rubber article is produced by dip-forming a vulcanizable rubber latex composition comprising an unsaturated nitrile-conjugated diene copolymer rubber latex, a sulfur-containing vulcanizer, and at least one vulcanization accelerator selected from (i) dithiocarbamic acid c
6365660 Resin composition and molded or formed product comprising vinyl cyclic hydrocarbon polymer April 2, 2002
A molded or formed product obtained by molding or forming a resin composition comprising (A) at least one vinyl cyclic hydrocarbon polymer selected from the group consisting of hydrogenated products of aromatic vinyl polymers, vinylcyclohexene polymers or hydrogenated products thereo
6365313 Toner for development of electrostatic image and production process thereof April 2, 2002
A toner for development of electrostatic images, obtained by subjecting a polymerizable monomer composition containing at least a colorant, a polymerizable monomer and a charge control agent to suspension polymerization in an aqueous medium containing a dispersing agent, wherein(a) the d
6355728 Block copolymer rubber composition comprising the same and pneumatic tire made therefrom March 12, 2002
A block copolymer (1) containing a polymer block A of a conjugated diene and a random copolymer block B of a conjugated diene and aromatic vinyl compound, (2) having a weight ratio (A:B) of the polymer block A and the copolymer block B of 5:95 to 95:5, (3) having a bound aromatic vinyl
6346581 Modified cycloolefin addition polymer and curable resin composition containing the same February 12, 2002
A curable resin composition comprising a modified cycloolefin addition polymer (A) obtained by introducing a functional group into a cycloolefin addition polymer containing a repeating unit (a) derived from a cycloolefin monomer having an organic group having at least 4 carbon atoms
6342621 Ruthenium catalysts for metathesis reactions of olefins January 29, 2002
Penta-coordinated ruthenium catalysts for the metathesis reactions of olefins, in particular ring opening metathesis polymerization (ROMP) of cyclo-olefin monomers, which are cationic complexes represented by formula I, II or III: ##STR1##wherein each of X.sup.1 and X.sup.2, which ma
6342328 Toner for development of electrostatic charge image and method for producing the same January 29, 2002
A toner for development of electrostatic images, comprising at least a binder resin, a colorant and a charge control agent, wherein the charge control agent is a polar resin composed of a copolymer of a vinyl monomer and SO.sub.3 X (X=H or alkali metal) group-containing (meth)acrylamide
6322780 Marek's disease virus vaccines for protection against Marek's disease November 27, 2001
A nucleotide sequence encoding the gp82 polypeptide of Marek's disease virus is disclosed. Also disclosed are recombinant viruses which are useful as vaccines for protecting against Marek's Disease, preferably containing two or more genes encoding Marek's Disease Virus antigens such
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