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7223827 |
Water control in a subsurface formation
A composition and a method of using the composition to adjust the permeability of a subsurface formation is disclosed. The composition is a water insoluble gel made by cross linking a water soluble...
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7048023 |
Pneumatic tire having a component containing high trans styrene-butadiene rubber
The invention is directed to a pneumatic tire having at least one component comprising a vulcanizable rubber composition, wherein the vulcanizable rubber composition comprises, based on 100 parts...
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6800582 |
Process of preparation of amino functionalized diene polymers, polymers of such type, rubber composition and tire casing containing those polymers
The present invention provides a process for preparing amino functionalized diene polymers with 1,4-trans linkage content equal to or greater than 70%. The invention also concerns polymers of such...
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6777511 |
Process for producing poly (meth) acrylates having reduced metal content
An industrially excellent process for producing a poly(meth)acrylate having a reduced metal content which comprises contacting a mixture of a poly(meth)acrylate and an organic solvent with an...
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6767976 |
Process for polymerizing a methacrylic ester or an acrylic ester
(1) A methacrylic ester or an acrylic ester is anionically polymerized, using a polymerization initiator compound comprising an addition reaction product of a conjugated diene compound and an...
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6758251 |
Pneumatic tire having a component containing high trans styrene-butadiene rubber
The invention is directed to a pneumatic tire having at least one component comprising a vulcanizable rubber composition, wherein the vulcanizable rubber composition comprises, based on 100 parts...
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6689852 |
Modifiers for improved olefin polymerization with activated neutral aluminum compounds
The present invention is for a transition metal-free catalyst system for synthesizing high molecular weight, linear polymers. The system comprises a catalyst composition having: (a) a neutral...
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6686423 |
Method for carrying out the anionic polymerization of vinylaromatic monomers
In a process for the anionic polymerization of vinylaromatic monomers or dienes in the presence of a lithium organyl or lithium alcoholate and a magnesium and/or an aluminum compound, a sterically...
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6627715 |
Group IIa metal containing catalyst system
The group IIa metal containing catalyst system of this invention can be utilized to synthesize rubbery polymers having a high trans microstructure by solution polymerization. Such rubbery polymers...
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6506862 |
Process for the preparation of a diene elastomer by anionic polymerization
The present invention provides a process for the preparation of a diene elastomer having a reduced amount of vinyl linkages, by anionic polymerization of one or more monomers comprising at least...
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6444767 |
Method for retarded anionic polymerization
In a process for the homopolymerization of vinylaromatic monomers or the copolymerization of vinylaromatic monomers and dienes, the monomers are polymerized in the presence of at least one alkali...
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6353056 |
Method for the production of block copolymers by retarded anionic polymerization
In a process for the preparation of block copolymers from vinylaromatic monomers and dienes, the monomers are polymerized in the presence of at least one alkali metal organyl or alkali metal...
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6296783 |
Gel-form solid polymer electrolyte
A polymeric gel electrolyte comprising: (a) an acrylic ester polymer matrix containing structural units derived from at least one acrylic ester selected from among acrylic esters represented by...
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6271324 |
Method for preparing polyacryl(meth)acrylates
Homopolymers, copolymers or block copolymers are prepared by anionic polymerization of acrylates and/or methacrylates in the presence of an initiator composition containing A) an organic alkali...
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5830961 |
Preparation of polyacrylates
Polyacrylates based on alkyl acrylates or alkyl alkylacrylates or mixtures thereof as monomers are prepared in the presence of an initiator composition containing an alkali metal ester enolate and...
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5753579 |
Trans microstructure directing initiator system
The process of this invention can be utilized to synthesize polymers having a high trans microstructure. The polymers which can be prepared utilizing the procedure of this invention include high...
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5656704 |
Highly syndiotactic PMMA polymers
Mechanically strong; heat-resistant and transparent PMMA polymers having a high content of syndiotactic triads, a number average molecular weight ranging from 5,000 to 500,000 and a polydispersity...
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5326838 |
Method of preparing homopolymers of conjugate dienes and copolymers of conjugate dienes with other dienes or vinyl aromatic compounds
A method of preparing homopolymers of conjugate dienes and copolymers of conjugate dienes with other dienes or with vinyl aromatic compounds, by means of which the aforementioned monomers are...
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4943621 |
Storage stable components of reactive formulations for bulk polymerization of cycloolefin monomers
Methods of preparing storage stable components useful for metathesis bulk polymerization of cycloolefin monomers are provided. These components contain cycloolefins with norbornene-functional...
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4503204 |
Solution polymerization
A composition useful as a catalyst in solution polymerization comprises (1) a barium, calcium and/or strontium alcoholate, (2) an organoaluminum compound and (3) an organomagnesium compound. (2)...
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4478953 |
Polymerization process of optically active polymer and catalyst therefor
An optically active polymer is obtained by polymerizing a vinyl monomer in the presence of a catalyst which comprises an asymmetric ligand compound of the formula (I) or (II): ##STR1## in which R 1...
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4226824 |
Process for spinning modacrylic fiber having high retraction and reduced inflammability
Modacrylic fibers having high retraction, reduced inflammability and high glossiness, prepared by wet spinning a solution, in an organic spinning solvent miscible with water, of a mixture of...
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4191816 |
Process for the preparation of olefine polymerization catalysts
A process for the preparation of catalysts for the polymerization of olefines, e.g. ethylene and propylene. This process comprises essentially the two following steps: (1) A compound (A) of an...
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4152505 |
Polymerization process
Homopolymers of conjugated dienes and copolymers of conjugated dienes with other conjugated dienes or with vinyl aromatic compounds having an elastomeric character are prepared by use of a...
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4148984 |
Catalyst system and process for polymerization of conjugatged dienes therewith
The catalyst system disclosed herein comprises one suitable for the polymerization of a conjugated diene, which system comprises a trihydrocarbyl aluminum compound, in which the hydrocarbyl group...
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4148986 |
Polymerization process
Homopolymers of conjugated dienes and copolymers of conjugated dienes with other conjugated dienes or with vinyl aromatic compounds having an elastomeric character are prepared by use of a...
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4116869 |
Organoaluminum-organophosphine-metal salt of a beta-diketone catalyst system
A catalyst system comprising (I) an organoaluminum compound, (II) an organophosphine compound, and (III) a metal salt of a beta-diketone, is effective to homopolymerize an alkene oxide,...
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4107081 |
Catalyst system and process for polymerization of conjugated dienes therewith
The catalyst system disclosed herein comprises one suitable for the polymerization of a conjugated diene, which system comprises a trihydrocarbyl aluminum compound, in which the hydrocarbyl group...
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4095017 |
Vinyl monomer polymerization or copolymerization catalyzed by organoaluminum-organophosphine-metal salt of a beta-diketone catalyst system
A catalyst system comprising (I) an organoaluminum compound, (II) an organophosphine compound, and (III) a metal salt of a beta-diketone, is effective to homopolymerize an alkene oxide,...
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4085070 |
Process for the preparation of an olefin-polymerization catalyst
An olefin-polymerization catalyst is prepared by reacting at least one compound of an element selected from the group consisting of the elements of groups Ia, IIa, II b, IIIa, IVa, Va and VIa of...
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4020018 |
Alkene oxide or acrylate polymerization or copolymerization catalyzed by organoaluminum-organophosphine-metal salt of a beta-diketone
A catalyst system comprising (I) an organoaluminum compound, (II) an organophosphine compound, and (III) a metal salt of a beta-diketone, is effective to homopolymerize an alkene oxide,...
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3972863 |
Method for preparing copolymers from conjugated dienes and monovinylaromatic compounds with random distribution of monomer units
A method of preparing copolymers of conjugated diene monomers and monovinylaromatic monomers having a random distribution of monomer units in the presence of a catalyst, metallic lithium in...
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3717613 |
PROCESS FOR PREPARING COPOLYMERS
A catalyst comprising an organoaluminum compound, an organic halogen compound containing labile halogen atom, and a compound of metal of Groups IV B-VII B or Group VIII of Deming's Periodic table...
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3687916 |
ORGANOALUMINUM COMPOUNDS AS ADJUVANTS IN AN ORGANOCALCIUM INITIATED POLYMERIZATION OF CONJUGATED DIENES AND/OR MONOVINYL AROMATIC COMPOUNDS
Polymers are produced from conjugated dienes and monovinyl-substituted aromatic compounds by employing a polymerization initiator system of an organoaluminum adjuvant and an organocalcium initiator...
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3539542 |
PROCESS FOR PRODUCING ALPHA-METHYLACRYLONITRILE POLYMERS
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3526604 |
POLYMERIZATION OF UNSATURATED MONOMERS WITH CATALYSTS FORMED FROM THE REACTION OF METALS AND DERIVATIVES OF GROUPS I-A AND II-A WITH COMPOUNDS OF GROUP III-A
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3519607 |
POLYMERIZATION OF VINYL PHOSPHORYL COMPOUNDS
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3506597 |
POLYMERIZATION OF OLEFIN OXIDES
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3484388 |
ALKENE OXIDE POLYMERIZATION WITH AN ORGANOALUMINUM,BETA-DIKETONE METAL SALT AND ADJUVANT CATALYST SYSTEM
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3468856 |
METHOD FOR PREPARATION OF POLYVINYL ETHERS
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3459688 |
ETHER ADDITIVES IN THE POLYMERIZATION OF ALKENE OXIDES
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3455890 |
CATALYST FOR OLEFIN POLYMERIZATION
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3448092 |
POLYMERIZATION PROCESS AND PRODUCT
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3429861 |
PROCESSES FOR POLYMERIZATION OF ACRYLONITRILE USING ORGANOMETALLIC COORDINATION COMPLEXES AS CATALYSTS
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3422079 |
COORDINATION COMPLEXES OF VINYLPHOSPHINE OXIDES AND METAL SALTS,AND POLYMERS THEREOF
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3387046 |
Production of soluble polycyclopentadienes
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3383333 |
Organometallic catalyst composition and use thereof in alkene oxide polymerization
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3380979 |
Novel process and polymer
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3379689 |
Process for the manufacture of acrolein polymers
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3301796 |
Method of epoxide or episulfide copolymer polymerization with nitro aromatic compound
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