| Patent Number |
Title Of Patent |
Date Issued |
| 6838412 |
.alpha.-Olefin polymerization catalyst and process for producing .alpha.-olefin polymer |
January 4, 2005 |
| An .alpha.-olefin polymerization catalyst comprising (A) a solid catalyst component containing a titanium compound obtained by treating a solid product having a titanium content of 1.5% by weight or less obtained by reducing Ti(OR.sup.1).sub.a X.sub.4-n (R.sup.1 represents a hydrocarbon |
| 6333388 |
Aluminum compound-containing solid catalyst component, catalyst for olefin polymerization and me |
December 25, 2001 |
| Described are an aluminum compound-containing solid catalyst component obtained by bringing a carrier into contact with an organoaluminumoxy compound, followed by bringing this product into contact with a compound having an electron attractive group; a transition metal-containing solid |
| 6329478 |
Transition metal complex, process for producing the same, olefin polymerization catalyst contain |
December 11, 2001 |
| The present invention relates to a transition metal complex, a process for producing the same, a polymerization catalsyt containing the transition metal complex and a process for producing polymers which uses the catalysts. |
| 6187883 |
Solid catalyst component for .alpha.-olefin polymerization, catalyst for .alpha.-olefin polymeri |
February 13, 2001 |
| The present invention relates to a solid catalyst component for .alpha.-olefin polymerization having a narrow particle size distribution of not less than 6.0 in terms of the value of N in a Rosin-Rammler function of particle size distribution and giving a catalytic activity of not le |
| 6133189 |
.alpha.-olefin polymerization catalyst and process for producing .alpha.-olefin polymer |
October 17, 2000 |
| An .alpha.-olefin polymerization catalyst which comprises:(A) a solid catalyst component containing a tetra-valent titanium obtained by treating a magnesium compound having an Mg--O bond in its molecule with a titanium halide;(B) an organoaluminum compound; and(C) an organosilicon compound r |
| 6100213 |
Aluminum compound-containing solid catalyst component, catalyst for olefin polymerization and me |
August 8, 2000 |
| Described are an aluminum compound-containing solid catalyst component obtained by bringing a carrier into contact with an organoaluminumoxy compound, followed by bringing this product into contact with a compound having an electron attractive group; a transition metal-containing solid |
| 6066704 |
Transition metal complex, catalyst for olefin polymerization, and process for producing olefin p |
May 23, 2000 |
| A transition metal complex represented by the formula [1] ##STR1## wherein M is a transition metal atom of the group 4 of the periodic table of elements; Cp is a group having a cyclopentadiene type anionic skeleton; A and G are each a divalent residue containing an atom of the group |
| 6051526 |
.alpha.-olefin polymerization catalyst and process for producing .alpha.-olefin polymer |
April 18, 2000 |
| An .alpha.-olefin polymerization catalyst which comprises (A) a solid catalyst component obtained by treating a solid product obtained by contacting a compound having an M--O bond (M is the element of the 1st, 2nd, 13th and 14th Groups in the Periodic Table) with an organomagnesium c |
| 5854164 |
Method for preparing catalyst component for olefin polymerization, catalyst for olefin polymeriz |
December 29, 1998 |
| A solid catalyst component (A) for olefin polymerization comprising Mg, Ti, a halogen and a cyclic organic nitrogen compound (C), a solid catalyst comprising the solid catalyst component and an organoaluminum compound, and a process for producing an olefin polymer with the catalyst.Accor |
| 5608018 |
.alpha.-olefin polymerization catalyst system and process for producing .alpha.-olefin catalyst |
March 4, 1997 |
| An .alpha.-olefin polymerization catalyst system having so high a catalytic activity and stereoregularity that the catalyst residue and amorphous polymer need not be removed and a process for producing an.alpha.-olefin polymer using the catalyst system, said catalyst system consisting |
| 5219938 |
Modified diene polymer rubbers |
June 15, 1993 |
| A process for preparing modified diene polymer rubbers having an increased impact resilience, a reduced hardness at low temperatures and an improved processability, and useful as rubber materials for automobile tires and other industries which comprises producing a conjugated diene polym |
| 5189109 |
Modified diene polymer rubbers |
February 23, 1993 |
| A process for preparing modified diene polymer rubbers having an increased impact resilience and a reduced hardness at low temperatures and useful as rubber materials for automobile tires and other industries which comprises producing an alkali metal-containing conjugated diene polymer, |
| 5189108 |
Modified polymer rubber and process for preparing the same |
February 23, 1993 |
| A modified polymer rubber is obtained by(1) graft-polymerizing at least one grafting monomer to a shreaded rubbery polymer (A) in an aqueous suspension at a temperature of 30.degree.-130.degree. C. to obtain a graft polymer, and(2) kneading the graft polymer with at least one polymerizable m |
| 5128416 |
Modified diene polymer rubbers |
July 7, 1992 |
| A process for preparing modified diene polymer rubbers having an increased impact resilience, a reduced hardness at low temperatures and an improved processability, and useful as rubber materials for automobile tires and other industries which comprises producing a conjugated diene polym |
| 5037891 |
Modified ethylene-.alpha.-olefin copolymer rubber and a process for producing the same |
August 6, 1991 |
| A modified copolymer rubber obtained by kneading at 200.degree.-280.degree. C.(A) at least one copolymer rubber material selected from the group consisting of an ethylene-.alpha.-olefin copolymer rubber having a number-average molecular weight of 10,000-100,000 and an ethylene content |
| 5015692 |
Process for preparing modified diene polymer rubbers |
May 14, 1991 |
| A process for preparing modified diene polymer rubbers having an increased impact resilience and a reduced hardness at low temperatures and useful as rubber materials for automobile tires and other industries which comprises producing an alkali metal-containing conjugated diene polymer, |
| 4957976 |
Process for preparing diene polymer rubbers |
September 18, 1990 |
| A process for preparing modified diene polymer rubbers having an increased impact resilience and a reduced hardness at low temperatures and useful as rubber materials for automobile tires and other industries which comprises producing an alkali metal-containing conjugated diene polymer, |
| 4918142 |
Rubber composition of tire tread containing block copolymer coupled with dicarboxylic acid ester |
April 17, 1990 |
| A rubber composition suitable for tire treads having well-balanced excellent steering stability in cornering, wet skid characteristic, ice skid characteristic and rolling characteristic, and an excellent processability, which comprises a rubber component containing a block copolymer |
| 4885338 |
Modified diene polymer rubbers |
December 5, 1989 |
| A process for preparing modified diene polymer rubbers having an increased impact resilience and a reduced hardness at low temperatures and useful as rubber materials for automobile tires and other industries which comprises producing an alkali metal-containing conjugated diene polymer, |
| 4812527 |
Rubber composition for tire treads containing dicarboxylic acid diester coupled block polymers |
March 14, 1989 |
| A rubber composition suitable for tire treads having well-balanced excellent wet skid characteristic, ice skid characteristic and rolling characteristic, and an excellent processability, which comprises a rubber component containing at least 20% by weight of a block copolymer consist |
| 4743652 |
Elastomeric copolymer of aromatic vinyl compounds and butadiene |
May 10, 1988 |
| An elastomeric copolymer of an aromatic vinyl compound and butadiene prepared by a solution polymerization method, which has a glass transition temperature of not less than -50.degree. C. and contains polymer chains modified with a trifunctional or tetrafunctional coupling agent, and whi |
| 4737535 |
Rubber composition for tire tread |
April 12, 1988 |
| A tire tread rubber composition which is improved in grip characteristic, steering stability characteristics and low-temperature characteristics, containing 15 to 50 parts by weight of a particular styrene-butadiene rubber obtained by solution polymerization containing polymer chains |
| 4710554 |
Polybutadiene and process for preparing the same |
December 1, 1987 |
| A polybutadiene having an average 1,2-bond content of 18 to 32% by mole, a branched polymer chain content of 60% by weight or more and a Mooney viscosity at 100.degree. C. of 40 to 90, the viscosity of a 5% by weight concentration solution of this polybutadiene in styrene at 25.degree. C |
| 4639494 |
Process for producing polystyrene |
January 27, 1987 |
| In a process for producing a high impact polystyrene comprising the radical polymerization of styrene in the presence of a butadiene rubber, the improvement which comprises, the butadiene rubber being a highly branched polymer prepared by homopolymerizing 1,3-butadiene or copolymerizing |
| 4537936 |
Diene rubber composition, method of preparing the same and tire employing said composition |
August 27, 1985 |
| A diene rubber composition comprising 25 to 90 parts by weight of at least one high molecular weight diene rubber (A) having an intrinsic viscosity [.eta.] of at least 2.0 and a glass transition point of not lower than -50.degree. C. and 75 to 10 parts by weight of at least one low molec |
| 4523618 |
Branched polymer, process for the preparation thereof, tire tread rubber composition and tire |
June 18, 1985 |
| A branched polymer which is a butadiene homopolymer or a copolymer of an aromatic vinyl compound and butadiene and has a glass transition temperature of not less than -50.degree. C. and of which at least 70% by weight of the polymer chains has a branched structure in which high molec |
| 4482678 |
Diene rubber composition and tire using it in tread |
November 13, 1984 |
| A diene rubber composition comprising as a main rubber component an elastomeric polymer having a glass transition temperature of not less than -50.degree. C. selected from the group consisting of a butadiene homopolymer and a copolymer of butadiene and an aromatic vinyl compound, sai |
| 4471093 |
Elastomer composition comprising a blend of SBR rubbers |
September 11, 1984 |
| A rubber composition having improved rolling resistance and wet grip characteristics with improved processability, abrasion resistance and durability which contains as a rubber component a mixture of a high molecular weight styrene-butadiene rubber having a specific microstructure an |
| 4436873 |
Conjugated diene block polymer and process for preparing the same |
March 13, 1984 |
| A conjugated diene block polymer composed of blocks having a different microstructure from each other such that one block contains 20 to 60% by mole of 1,2- and/or 3,4-bonding, the other block contains 50 to 90% by mole of 1,2- and/or 3,4-bonding, the difference in the 1,2- and/or 3, |
| 4385151 |
Composition containing isoprene polymer |
May 24, 1983 |
| A rubber composition containing an isoprene homopolymer or copolymer having a glass transition temperature of not less than -50.degree. C. and a Mooney viscosity of 20 to 120. The composition can provide a cured rubber having a high wet road gripping force and a small dynamic heat genera |
