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4077903 |
Preparation of an active olefin polymerization catalyst
A titanium catalyst for polymerization of olefins is prepared by reduction of TiCl 4 with a mixture of AlEt 2 Cl and AlEt 3 , where at high AlEt 3 to AlEt 2 Cl ratios the aluminum reducing...
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4069376 |
Process for substantially gel-free polymerization of norbornene with dicyclopentadiene
A norbornene-type monomer is copolymerized with about 0% to about 95% by weight of dicyclopentadiene, based upon total polymer weight. The polymerization is conducted in the presence of (1) a...
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4063010 |
Copolymers of olefins or of olefins and non-conjugated dienes with unsaturated derivatives of cyclic imides
Novel amorphous copolymers of mono-olefins or of mono-olefins and non-conjugated dienes with unsaturated derivatives of imides are disclosed. These copolymers containing from 99.9 to 80% by weight...
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4048419 |
Process for the production of partially crystalline polybutene-1
Butene-1 optionally in the presence of up to 10% by weight of propene or like comonomer, is polymerized in excess butene-1 or liquid C 4 fraction at 60°-120° C. to form a polybutene suitable for...
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4008177 |
Process for the manufacture of a catalyst
A catalyst of high activity and stereospecificity in α-olefin polymerization is obtained when titanium trichloride, prepared by reduction with aluminum alkyl halides, is treated first with an...
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4004071 |
Process for the polymerization of ethylene
Polyethylene or copolymers of ethylene with another α-olefin can be produced by the use of a novel polymerization catalyst obtained by using, in combination, (A) a specified, hydrocarbon-insoluble...
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3995098 |
Method of polymerizing olefins
The method of polymerizing olefins which includes the preparation of a pre-activated compound of a transition metal of IVa, Va and VIa of the periodic table of elements, in which the transition...
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3984387 |
Preparation of linear α-olefin polymers having ultra high molecular weight
Ultra high molecular weight, linear α-olefin polymers are produced without reactor fouling by polymerizing an α-olefin in the presence of Ziegler catalyst dispersed in an inert diluent and an...
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3980623 |
Process for ethylene-propylene-diene terpolymers using VCl.sub.4 as catalyst and as cocatalyst (1) R.sub.3 Al and (2) RAlCl.sub.2 in admixture
This invention is directed to a process for preparing copolymers of ethylene with certain alpha olefins and nonconjugated dienes. The novel aspect of this invention relates to a catalyst system...
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3979372 |
Preparation of titanium trichloride polymerization catalyst component
It is known to prepare highly active catalyst components for a Ziegler polymerization catalyst by reduction of titanium tetrachloride with an aluminum alkyl. An improvement in the preparation of...
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3959234 |
Method of polymerizing carbonimide norbornene derivatives
A method of polymerizing imide type norbornene derivatives which comprises the ring-opening polymerization of imide type norbornene derivatives containing at least one N-substituted cyclic imide...
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3956255 |
Catalyst for the polymerization of olefins
A supported catalyst for the polymerization and copolymerization of ethylene in the presence of hydrogen as a molecular weight control agent is prepared by depositing upon silica gel which has been...
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3950268 |
Catalyst for the polymerization of olefins
A novel catalyst for producing crystalline poly alpha-olefins in excellent yields which coproduces substantially zero percent of low-molecular-weight and amorphous polymers is herein described....
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3939132 |
Process for the preparation of random copolymers of mono-olefins or of mono-olefins and unconjugated dienes with unsaturated derivatives selected from N-vinylimidazoles and N-vinylimidazolines
A process is described for the preparation of substantially linear, amorphous random copolymers of mono-olefins or mono-olefins and unconjugated dienes with unsaturated nitrogen derivatives...
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3935175 |
Process for the polymerization of unsaturated compounds
An olefin or diolefin is polymerized, and mixtures thereof are copolymerized, in the presence of a catalyst system consisting of: A. a uranium compound consisting of U(OCH 3 ) 4 , U(OCH 3 ) 3 ...
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3925338 |
Control of polymer particle size in olefin polymerization
Control of particle size of olefin polymers produced by gas-phase polymerization of at least one olefin using Ziegler-type catalysts deposited on solid supports in a fluidized-solids operation is...
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3910870 |
Process for the polymerization of alpha olefins
A process for polymerizing α - olefins is described which permits control of particle size distribution in the resulting polymers. It comprises the well-known Ziegler low pressure polymerization...
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3888949 |
Blends of propylene-alpha-olefin copolymers and polypropylene
Blends of stereoregular propylene-α-olefin copolymers and polypropylene of similar stereoregularity characterized by melting and crystallization behavior characteristic of the stereoregular...
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3883493 |
Method for producing copolymers of 1-olefins with conjugated dienes
A method for preparing copolymers of 1-olefins with conjugated dienes, such as an alternating copolymer of ethylene with butadiene, which comprises copolymerizing at least one 1-olefin with at...
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3864278 |
POLYMERIZATION CATALYST
A process for preparation of a Ziegler-type catalyst having increased activity comprises admixing titanium tetrachloride, trihydrocarbyl aluminum and an ether, aging the mixture followed by...
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3764589 |
ALPHA-OLEFIN INTERPOLYMERS FORMED WITH UNSATURATED ORGANO SILANES
The preparation of interpolymers of ethylene by interpolymerization of ethylene, an unsaturated organo silane and a monoolefin and with or without a polyene in the presence of a Ziegler type...
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3723350 |
PROCESS FOR THE POLYMERIZATION OF OLEFINS
Improved olefin polymerization catalyst made by mixing a titanium tetra halide, a zirconium tetra halide, a titanium tetra ester, a chromium oxyhalide or a mixture thereof with a vanadium oxyhalide...
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3718635 |
PROCESS FOR POLYMERIZATION OF OLEFINS AND CATALYST COMPOSITION THEREFOR
A process for polymerizing α-olefins in the presence of a Ziegler catalyst, such catalyst comprising (i) a pulverulent catalyst component obtained by mechanically or physically copulverizing a...
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3678018 |
SULFUR-CURABLE OLEFINIC COPOLYMERS AND METHOD FOR PRODUCING THE SAME
A sulfur-curable olefinic copolymer consisting essentially of 1. at least one 2-norbornene compound having at the fifth position of the norbornene nucleus a hydrocarbon group containing at least 3...
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3676411 |
TERNARY CATALYST SYSTEMS FOR THE POLYMERIZATION OF CONJUGATED DIOLEFINS
There is disclosed a process for the polymerization of conjugated diolefins and mixtures thereof which comprises contacting at least one conjugated diolefin with a catalyst system comprising (A) at...
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3674766 |
POLYMERIZATION OF ETHYLENE AND CATALYSTS THEREFOR
Catalysts useful for making ethylene polymers by polymerizing ethylene alone or with a comonomer in the presence of hydrogen are described. They consist essentially of a mixture of (1) a bromo...
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3665059 |
POLYPHASE PROPYLENE POLYMER-RUBBER COMPOSITIONS AND PROCESS FOR THEIR PREPARATION
Polyphase compositions having, as a continuous phase a propylene polymer and as a second phase a synthetic or natural rubber, are prepared by dispersing a propylene polymer of substantially all...
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3607793 |
PROCESS FOR FORMING POROUS STRUCTURES
An improved method is taught for preparing porous structures from olefin polymers by heating a dispersion of such polymers in a hydrocarbon liquid to a temperature above the solution temperature,...
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3541063 |
PROCESS FOR THE POLYMERIZATION OF DIOLEFINS WITH A CATALYST COMPRISING ALKYLALUMINUM COMPOUNDS,GROUP III-B ORGANO METAL COMPOUNDS AND ORGANOALUMINUM FLUORIDE COMPOUNDS
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3539541 |
PREPARATION OF COPOLYMERS CONTAINING ETHYLENE AND PROPYLENE
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3536686 |
PROCESS FOR PREPARING HIGHLY CRYSTALLINE POLYOLEFINS AND POLYMERIZATION CATALYSTS THEREFOR
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3535297 |
POLYMERIZATION OF ETHYLENE USING SUPPORTED ACTIVATED CHROMYL CHLORIDE CATALYSTS
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3535303 |
PROCESS FOR THE PREPARATION OF UNSATURATED HYDROCARBON POLYMERS HAVING A HIGH PERCENTAGE OF VINYL OPENING CONFIGURATION
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3514433 |
PROCESS FOR THE PRODUCTION OF ISOTACTIC POLYOLEFINS
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3510465 |
PROCESS FOR POLYMERIZING OLEFINIC HYDROCARBONS
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3506629 |
PROCESS FOR PREPARING ETHYLENE COPOLYMERS USING AN ACTIVATED ZIEGLER CATALYST
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3492281 |
PROCESS FOR THE POLYMERIZATION OF DIOLEFINS WITH BETA TITANIUM TRICHLORIDE AND ORGANOALUMINUM COMPOUNDS
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3492277 |
OLEFINE COPOLYMERS CONTAINING POLAR GROUPS AND PROCESS FOR THEIR PREPARATION
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3489732 |
BUTENE-1,C10-C18 ALPHA MONOOLEFIN AND OPTIONAL PROPYLENE CONTAINING INTERPOLYMERS
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3489736 |
POLYMERIZATION OF OLEFINS
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3487055 |
HYDROCARBON COPOLYMERS CONTAINING 2(4-CYCLOHEXENYL)(2,2,1)BICYCLONEPT-5-ENE
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3478008 |
PREPARATION OF PROPYLENE HAVING INTERMEDIATE CRYSTALLINITY WITH A CATALYST COMPRISING (1) TICL4-METAL HYDRIDE-ALKYL ALUMINUM HALIDE AND (2) ALUMINUM TRIALKYL
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3478002 |
COPOLYMERS OF SUBSTITUTED NORBORNENES AND OLEFINS AND PROCESS FOR PRODUCING THE SAME
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3477999 |
METHOD FOR POLYMERIZATION OF VINYL COMPOUNDS
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3464962 |
COPOLYMERS OF BUTENE-1 AND PROPYLENE
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3461083 |
CRYSTALLINE TICL3 AND METHOD OF PREPARING SAME
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3457246 |
COPOLYMERS OF 4-METHYL-1-PENTENE WITH LOWER 1-OLEFINS
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3455891 |
METHOD OF POLYMERIZING ISOPRENE WITH ZIEGLER TYPE CATALYST
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3449312 |
POLYMERIZATION WITH ALUMINUMIODINE TYPE CATALYSTS
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3445443 |
PROCESS FOR THE PREPARATION OF POLYOLEFINS WITH A TRANSITION METAL HALIDE-ORGANO ALUMINUM COMPOUND CATALYST
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