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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Job; Robert C.
Address:
Houston, TX
No. of patents:
48
Patents:












Patent Number Title Of Patent Date Issued
H860 Method for polymerizing alpha olefins December 4, 1990
An alpha olefin polymerization reaction using a first alpha olefin monomer and a magnesium supported titanium halide/aluminum alkyl catalyst system wherein said system comprises:(a)(i) a procatalyst component;(ii) a cocatalyst component; and(iii) a selectivity control agent;(b) discontinuing
5550194 Process for making graft block copolymers by grafting anionic polymer chains onto functionalized August 27, 1996
A graft block copolymer is comprised of a saturated olefinic backbone with pendent anionic polymer side chains. The polymer is produced by copolymerizing an .alpha.--olefin with a 1-alkenyl monomer containing a functional group to which an anionically polymerized polymer can be graft
5543458 Process for making graft block copolymers by growing anionic polymer chains from functionalized August 6, 1996
A graft block copolymer is comprised of a completely saturated olefinic backbone with pendant anionic polymer side chains. The polymer is produced by copolymerizing an .alpha.-olefin with a monomer which contains a functional group which can be metallated so an anionic monomer can be
5371157 Olefin polymerization catalyst December 6, 1994
A high activity olefin polymerization catalyst, useful in the polymerization of lower .alpha.-olefins, comprises the solid product resulting from contacting a complex magnesium-containing, titanium-containing alkoxide compound with alkylaluminum halide, optionally employed in conjunc
5294581 Process and catalyst for producing mildly elastomeric primarily isotactic polymers March 15, 1994
A process and a catalyst for the production of mildly elastomeric primarily isotactic polyolefins characterized by intermediate average block lengths wherein olefins are polymerized in the presence of the catalyst which comprises the reaction product of a magnesium alkoxide and a tetrava
5281567 Olefin polymerization catalyst January 25, 1994
An improved high activity olefin polymerization catalyst catalyzes the production of polymeric lower .alpha.-olefin having good properties and a relatively narrow particle size distribution. The catalyst is produced from an organoaluminum cocatalyst, a selectivity control agent and a nov
5270410 Process for the production of elastomeric, primarily syndiotactic polypropylene and catalysts fo December 14, 1993
A process and a catalyst for the production of elastomeric primarily syndiotactic polypropylene characterized by short average block lengths wherein propylene is polymerized in the presence of the catalyst which comprises the reaction product of a magnesium alkoxide and a tetravalent
5270276 Process for the production of elastomeric, primarily syndiotactic polypropylene and catalysts fo December 14, 1993
A process and a catalyst for the production of elastomeric primarily syndiotactic polypropylene characterized by short average block lengths wherein propylene is polymerized in the presence of the catalyst which comprises the reaction product of a magnesium alkoxide and a tetravalent
5229477 Process for producing ethylene-propylene-diene monomer terpolymer July 20, 1993
Ethylene-propylene-diene monomer terpolymers having a high degree of random polymerization are produced by employing a high activity, stereo-regular olefin polymerization catalyst comprising a titanium halide-containing procatalyst, an organoaluminum compound cocatalyst and a moderately
5229344 Olefin polymerization catalyst July 20, 1993
An improved high activity olefin polymerization catalyst catalyzes the production of polymeric lower .alpha.-olefin having good properties and a relatively narrow particle size distribution. The catalyst is produced from an organoaluminum cocatalyst, a selectivity control agent and a nov
5229342 Olefin polymerization catalyst July 20, 1993
A complex alkoxide compound containing magnesium, titanium and boron species comprises the reaction product of elemental magnesium, titanium tetraalkoxide, an alkyl borate ester and alkanol at elevated temperature in an inert diluent. This complex alkoxide compound is contacted with a
5185410 Olefin polymerization catalyst February 9, 1993
An improved high activity olefin polymerization catalyst catalyzes the production of polymeric lower .alpha.-olefin having good properties and a relatively narrow particle size distribution. The catalyst is produced from an organoaluminum cocatalyst, a selectivity control agent and a nov
5164352 Process for the production of elastomeric, primarily isotactic polyolefins and catalysts for use November 17, 1992
A process for the production of elastomeric, primarily isotactic polyolefins which comprises polymerizing olefins in the presence of a catalyst which comprises the reaction product of a magnesium alkoxide and a tetravalent titanium halide wherein the reaction takes place in the prese
5162277 Olefin polymerization catalyst November 10, 1992
An improved high activity olefin polymerization catalyst catalyzes the production of polymeric lower .alpha.-olefin having good properties and a relatively narrow particle size distribution. The catalyst is produced from an organoaluminum cocatalyst, a selectivity control agent and a nov
5151399 Olefin polymerization catalyst September 29, 1992
A complex alkoxide compound containing magnesium, titanium and boron species comprises the reaction product of elemental magnesium, titanium tetraalkoxide, an alkyl borate ester and alkanol at elevated temperature in an inert diluent. This complex alkoxide compound is contacted with a
5146028 Olefin polymerization catalyst and process of polymerization September 8, 1992
Improved lower .alpha.-olefin polymerization catalysts are produced from an organoaluminum cocatalyst, a selectivity control agent and a specified magnesium-containing, titanium-containing, halide-containing procatalyst. The procatalyst is produced from an electron donor, tetravalent tit
5141910 Olefin polymerization catalyst August 25, 1992
A complex alkoxide compond precursor of an olefin polymerization catalyst component is produced by contacting a magnesium alkoxide, a titanium alkoxide and a borate ester in alkanol solution. Akanol is removed from the resulting complex alkoxide compound alcoholate and the resulting
5134209 Process of producing ethylene-propylene rubbery copolymer July 28, 1992
Ethylene-propylene rubbery copolymers having a high degree of random polymerization are produced by employing a high activity, stereoregular polymerization catalyst comprising a titanium halide-containing procatalyst, an organoaluminum compound cocatalyst and a moderately hindered ar
5132263 Olefin polymerization catalyst July 21, 1992
A complex, magnesium-containing, titanium-containing solid olefin polymerization procatalyst precursor is produced by reaction of magnesium alkoxide, titanium tetraalkoxide and a phenolic compound followed by removal of alkanol. Conversion of this solid to an olefin polymerization pr
5124298 Olefin polymerization catalyst June 23, 1992
An improved olefin polymerization process employs an olefin polymerization catalyst produced from a polymerization procatalyst made from a magnesium alkoxide, a titanium tetraalkoxide, a tetravalent titanium halide, a phenolic compound and an alkanol. The procatalyst precursor is contact
5122494 Olefin polymerization catalyst June 16, 1992
A high activity olefin polymerization catalyst, useful in the polymerization of lower .alpha.-olefins, comprises the solid product resulting from contacting a complex magnesium-containing, titanium-containing alkoxide compound with alkylaluminum halide, optionally employed in conjunc
5118768 Process for the production of elastomeric, primarily isotactic polyolefins and catalysts for use June 2, 1992
A process for the production of elastomeric, primarily isotactic polyolefins which comprises polymerizing olefins in the presence of a catalyst which comprises the reaction product of a magnesium alkoxide and a tetravalent titanium halide wherein the reaction takes place in the prese
5118767 Process for producing mildly elastomeric primarily isotatic polypropylene and poly-1-butene June 2, 1992
A process and a catalyst for the production of mildly elastomeric primarily isotactic polyolefins characterized by intermediate average block lengths wherein olefins are polymerized in the presence of the catalyst which comprises the reaction product of a magnesium alkoxide and a tetrava
5118649 Process for the production of elastomeric primarily isotactic polyolefins and catalysts for use June 2, 1992
A process and a catalyst for the production of elastomeric primarily isotactic polyolefins characterized by short average blocks lengths wherein olefins are polymerized in the presence of the catalyst which comprises the reaction product of a magnesium alkoxide and a tetravalent tita
5106806 Olefin polymerization catalyst April 21, 1992
Improved lower .alpha.-olefin polymerization catalysts are produced from an organoaluminum cocatalyst, a selectivity control agent and a specified magnesium-containing, titanium-containing, halide-containing procatalyst. The procatalyst is produced from an electron donor, tetravalent tit
5089573 Process for the production of elastomeric, primarily isotactic polyolefins and catalysts for use February 18, 1992
A process and a catalyst for the production of elastomeric primarily isotactic polyolefins characterized by short average block lengths wherein olefins are polymerized in the presence of the catalyst which comprises the reaction product of a magnesium alkoxide and a tetravalent titanium
5082907 Olefin polymerization catalyst January 21, 1992
A complex alkoxide compound precursor of an olefin polymerization catalyst component is produced by contacting a magnesium alkoxide, a titanium alkoxide and a borate ester in alkanol solution. Alkanol is removed from the resulting complex alkoxide compound alcoholate and the resulting
5077357 Olefin polymerization catalyst December 31, 1991
An improved olefin polymerization process employs an olefin polymerization catalyst produced from a polymerization procatalyst made from a magnesium alkoxide, a titanium tetraalkoxide, a tetravalent titanium halide, a phenolic compound and an alkanol. The procatalyst precursor is contact
5066737 Olefin polymerization catalyst November 19, 1991
A complex, magnesium-containing, titanium-containing solid olefin polymerization procatalyst precursor is produced by reaction of magnesium alkoxide, titanium tetraalkoxide and a phenolic compound followed by removal of alkanol. Conversion of this solid to an olefin polymerization pr
5034361 Catalyst precursor production July 23, 1991
Normally sparingly soluble magnesium alkoxide is solubilized in alkanol by the additional presence of certain acidic materials. The resulting solution is used to produce a mixture of substantially spherical particles, substantially free of fines, containing an adduct magnesium alkoxi
4971936 Catalyst component for making primarily isotactic elastomeric polypropylene or polybutene November 20, 1990
A catalyst component and catalyst composition useful in the production of elastomeric, primarily isotactic polypropylene and polybutene is disclosed and it comprises the reaction product of a magnesium alkoxide compound and a tetravalent titanium halide wherein the reaction takes place i
4959336 Silicate-modified magnesium ethoxide polymerization catalysts September 25, 1990
A process is disclosed for improving the productivity of a polymerization catalyst formed from a magnesium ethoxide. The process comprises treating the magnesium ethoxide with a silane alkoxide at or above the temperature at which any alcohol which may be bound to the ethoxide dissociate
4948770 Method for crystallizing magnesium chloride and method for using in a catalyst composition August 14, 1990
Disclosed is a method for making crystalline magnesium halide particles usable for preparing catalyst and usable in the polymerization of alpha olefins having the formula MgnEmXp * y ROH wherein y is a value greater than 0 and up to 12, and which comprises the steps of:contacting the com
4914069 Preparation of olefin polymerization catalyst component April 3, 1990
Solid catalyst components for use in the polymerization of olefins and having improved activity and selectivity are prepared by:(a) halogenating a magnesium compound containing at least one aryloxy, alkyl carbonate or alkyloxy group with a first halide of tetravalent titanium and a first
4876230 Magnesium alkoxide polymerization catalyst by boiling in organic solvents October 24, 1989
A process is disclosed for improving the morphology of a polymerization catalyst formed from a magnesium alkoxide with bound alcohol. The process comprises treating the magnesium alkoxide with an unreactive solvent at or above the temperature at which the alcohol dissociates from the alk
4874737 Silicate-modified magnesium alkoxide polymerization catalysts October 17, 1989
A process is disclosed for improving the productivity of a polymerization catalyst formed from a magnesium alkoxide which normally undergoes poor metathesis towards production of magnesium chloride. The process comprises treating the magnesium alkoxide with a silane alkoxide at or above
4870040 Olefin polymerization catalysts from soluble magnesium alkoxides made from alkyl or aryl magnesi September 26, 1989
A solid catalyst component which is prepared by:mixing an alkyl or aryl magnesium compound with a branched or aromatic aldehyde in the presence of a solvent;adding a tetravalent titanium halide to the solution;recovering the resulting precipitate; andcontacting the precipitate with a tetravalent
4870039 Olefin polymerization catalysts from soluble magnesium alkoxides made from mixed magnesium alkyl September 26, 1989
A process for polymerizing alpha olefins with a polymerization catalyst containing a solid catalyst component which is prepared by mixing two or more alkyl or aryl magnesium compounds with an aldehyde or a ketone in the presence of a solvent, adding a tetravalent titanium halide to the
4855371 Process for polymerizing olefins with a crystalline magnesium catalyst component August 8, 1989
A process for polymerizing olefins utilizing a catalyst containing crystalline magnesium halides/titanium halide catalyst components having improved activity and morphological properties is disclosed and claimed. In particular, the components are prepared by reacting a crystalline al
4818799 Process for the in-reactor stabilization of polyolefins April 4, 1989
A process for the in-reactor stabilization of an alpha olefin comprising the steps of sequentially:adding alpha olefin monomer into a polymerization reactor;adding a mixture of selectivity control agent and cocatalyst to the polymerization reactor;adding a procatalyst to the polymerization r
4806696 Process for stable preparation of alkoxymagnesium compounds February 21, 1989
A process is disclosed for preparing a stable crystalline alkoxymagnesium compound which comprises treating the compound with a buffer compound. The buffer compound is preferably tetraethoxysilane.
4804648 Crystalline olefin polymerization catalyst component February 14, 1989
Crystalline magnesium olefin polymerization catalyst components capable of producing polymer with improved activity and morphological properties are disclosed and claimed. In particular, the components are prepared by reacting a crystalline alkoxy magnesium compound with a halide of
4771024 Olefin polymerization catalyst composition September 13, 1988
Olefin polymerization catalyst components having improved activity and morphological properties are disclosed and claimed. In particular, the components are prepared by reacting a carbonized magnesium alkoxide or aryloxide component with a halogenated tetravalent titanium component, a
4728705 Olefin polymerization catalyst composition March 1, 1988
Olefin polymerization catalyst components having improved activity and morphological properties are disclosed and claimed. In particular, the components are prepared by reacting a carbonized magnesium alkoxide or aryloxide component with a halogenated tetravalent titanium component, a
4710482 Olefin polymerization catalyst component December 1, 1987
Olefin polymerization catalyst components having improved activity and morphological properties are disclosed and claimed. In particular, the components are prepared by reacting a magnesium compound of the formula [Mg.sub.4 (OR).sub.6 (R'OH).sub.10 ]X where "X" is a counter ion having a
4657995 Olefin polymerization catalyst compositions and polymerization process April 14, 1987
A highly active and stereoselective olefin polymerization catalyst component is obtained by halogenating a magnesium compound of the formula MgR'R" wherein R' is an alkoxide or aryloxide group and R" is an alkoxide or aryloxide group or halogen, with a halide of tetravalent titanium in
4548915 Olefin polymerization catalyst composition October 22, 1985
A free-flowing, high activity propylene polymer procatalyst component is prepared by the addition of limited amounts of a mineral oil (e.g., 5 to 25 percent) to the recovered MgCl.sub.2 /TiCl.sub.4 /ED procatalyst. The mineral oil becomes absorbed into the catalyst pores resulting in dry
4535068 Olefin polymerization catalyst compositions and polymerization process August 13, 1985
A highly active and stereoselective olefin polymerization catalyst component is obtained by halogenating a magnesium compound of the formula MgR'R" wherein R' is an alkoxide or aryloxide group and R" is an alkoxide or aryloxide group or halogen, with a halide of tetravalent titanium in










 
 
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