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6133386 |
Metal oxide solid acids as catalysts for the preparation of hydrocarbon resins
Metal oxide solid acids are used as catalysts for the polymerization of a feed stream containing at least one of pure monomer (e.g., styrene based monomers), C5 monomers, and C9 monomers to produce...
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6107374 |
Asphalt modified with olefin/vinylidene aromatic monomer interpolymers
Bitumens can be blended with interpolymers prepared from least one olefin and at least one vinyl or vinylidene aromatic monomer and, optionally, at least one diene. The interpolymers prepared from...
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6075105 |
Polymerization processes and resin particles formed thereby
A process for the preparation of resin particles comprising: heating a mixture comprised of a free radical initiator compound, at least one stable free radical compound, at least one free radical...
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6037048 |
Fibers made from long chain branched syndiotactic vinyl aromatic polymers
Fibers having increased strength and small diameters can be produced from compositions comprising long chain branched syndiotactic vinyl aromatic polymers. Due to the increased fiber strength, less...
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6034196 |
Super random copolymers of ethylene with olefinic monomers
Copolymers of ethylene with comonomers selected from (a) alpha-olefins, (b) cycloolefins and/or (c) dienes, characterized by the fact that: the molar percentage of the comonomer (% α) and the...
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6011128 |
Process for conditioning a gas-phase reactor to produce an ethylene-propylene or ethylene-propylene-diene rubber
There is provided process for producing an ethylene-alpha-olefin polymer at a polymerization reaction temperature in excess of the softening temperature of the polymer in a gas-phase fluidized-bed...
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5990256 |
Long chain branched syndiotactic vinyl aromatic polymers
Long chain branched syndiotactic vinyl aromatic polymers can be obtained by polymerizing the vinyl aromatic monomer in the presence of a small amount of a multifunctional monomer under conditions...
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5986020 |
Process for producing hyperbranched polymers
A method is provided for producing hyperbranched polymers comprising heating a polymerizable reaction charge comprising (a) a monomer mixture comprising 50-99.1% by weight of at least one...
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5955537 |
Continuous polymerization process
This invention discloses a process for synthesizing a styrene-butadiene polymer which comprises the steps of: (1) continuously charging 1,3-butadiene monomer, an organolithium compound, a polar...
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5939505 |
High solids ethylene vinyl acetate emulsions
In a process for the polymerization of aqueous ethylene vinyl acetate emulsions wherein the polymerization is carried out in the presence of a stabilizing system comprising polyvinyl alcohol and a...
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5929185 |
Copolymers of alk-1-enes and α, ω-dienes having a high viscosity index
Copolymers have a viscosity index VI of more than 160 and comprise A) from 99.0 to 99.99 % by weight of C 2 -C 20 -alk-1-enes and B) from 0.01 to 1.0% by weight of C 5 -C 20 -α,ω-dienes...
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5922823 |
Ethylene-α-olefin-nonconjugated polyene random copolymer
Disclosed is a process for preparing an ethylene-α-olefin-nonconjugated polyene random copolymer comprising random copolymerizing (a) ethylene, (b) an α-olefin of 3 or more carbon atoms and (c) a...
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5919855 |
Use of modified carbon black in gas-phase polymerizations
A process for the production of a polymer is disclosed wherein the polymerization occurs in a fluidized bed reactor or a reactor for the gas-phase production of a polymer and in the presence of a...
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5912303 |
Ethylene/α-olefin/nonconjugated polyene terpolymer rubber composition and vulcanized rubber obtained therefrom
A terpolymer rubber prepared from ethylene, α-olefin having 3 to 20 carbon atoms and branched chain polyene of the formula ##STR1## wherein R 1 represents C 1 -C 5 alkyl, and R 2 and R 3 ...
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5905118 |
Miscible polymers
Disclosed herein are terpolymers of styrene, acrylonitrile and dimethyl styrene phosphonate and blends thereof with poly(styrene acrylonitrile) polymers and polymers and copolymers of...
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5880240 |
Alkyl-containing porous resin, process for its preparation and its use
An alkyl-containing porous resin with a specific surface area of 50 to 600 m 2 /g, the resin being prepared by polymerizing a monomer mixture of, based on the total weight of the monomers, 15 to...
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5877336 |
Synthesis of tributyltin lithium
Triorgano substituted-tin lithium initiators are made in a dimethyl ether solvent. The substitution of dimethyl ether as the solvent for the traditional tetrahydrofuran solvent results in an...
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5874510 |
Process for making crosslinked copolymers of maleic anhydride and methyl vinyl ether
A process for making crosslinked polymers of maleic anhydride and methyl vinyl ether is described. The process is characterized by precharging methyl vinyl ether, partially or totally, in isopropyl...
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5869591 |
Thermoset interpolymers and foams
The subject invention provides a thermoset elastomer comprising a crosslinked pseudorandom or substantially random interpolymer of: (a) from 15 to 70 weight percent of monomer units derived from at...
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5859277 |
Silicon-containing solid support linker
A compound of the formula ##STR1## where R is a solid support; R 1 and R 2 are alkyl, unsubstituted alkyl, or phenyl, and where R 1 and R 2 can be the same or different, for use in solid-phase...
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5859160 |
Additives for controlling cure rate of polymerizable composition
A free radical curable composition that includes a free radical curable and a vinyl aromatic compound that is chemically different than the free radical curable component, wherein the vinyl...
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5854366 |
Styrene base random copolymer and process for producing the same
A styrene base random copolymer having a weight average molecular weight of 200,000 to 1,000,000, a monovinylbenzene unit and a divinylbenzene unit in an amount of 50 to 500 ppm by weight based on...
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5854363 |
(Omega-alkenyl) (cyclopentacarbyl) metallocene compounds
An (omega-alkenyl) (cyclopentacarbyl) metallocene compound is provided. Polymerization processes therewith are also provided.
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5837791 |
Unsaturated copolymer of ethylene and process for preparing the same
A novel unsaturated copolymer of ethylene comprises a random copolymer of (i) ethylene, (ii) an α-olefin of 3 to 20 carbon atoms and (iii) at least one straight chain or branched chain...
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5814714 |
Mono-olefin/polyene interpolymers, method of preparation, compositions containing the same, and articles made thereof
Interpolymer of a) a mono-olefin selected from the group consisting of α-olefins and cyclic olefins, and b) a non-conjugated polyene having at least 7 carbon atoms and having two readily...
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5807948 |
Vulcanizable rubber composition containing ehtylene-α-olefin-nonconjugated polyene random copolymer
Disclosed is a process for preparing an ethylene-α-olefin-nonconjugated polyene random copolymer comprising random copolymerizing (a) ethylene, (b) an α-olefin of 3 or more carbon atoms and (c) a...
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5807946 |
Vehicle parts comprising ethylene/2-olefin/vinylnorbornene elastomeric polymers
Motor vehicle brake parts based on an ethylene, alpha-olefin, vinyl norbornene elastomeric polymer are manufactured with more efficiency due to brake part compounds having lower viscosity, faster...
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5786441 |
Polymers, elastomeric compounds and products thereof, derived from novel amine compounds containing side-chain organolithium moieties
A functionalized polymer comprising a polymeric segment, having at least one cyclic amine end group, defined according to formula (I) ##STR1## where Z is an anionically-polymerized polymer; R 1 is...
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5770681 |
Modified bisimide compositions
The solution stability of a modified bisimide resin is enhanced by partially polymerizing a mixture of a bisimide monomer and a reactive triene which contains a conjugated double bond capable of...
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5763556 |
Copolymers of ethylene and geminally disubstituted olefins
Substantially random ethylene copolymers containing at least 3.0 mole percent of geminally disubstituted olefin monomers are described. The geminally disubstituted olefin monomers can be...
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5756624 |
Terpene copolymers
A method of tackifying an adhesive is provided, the improvement comprising the use of a copolymer consisting of monomer units derived monomers consisting of: (A) 10 to 50% by weight of a terpene...
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5747618 |
Allene/alkyne copolymers
The invention features linear copolymers prepared from mixtures of allenes and alkynes. The new copolymers have the formula: ##STR1## wherein R 1 through R 6 are, independently, H, an alkyl, an...
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5744566 |
Unsaturated copolymer based on olefin and produciton and use thereof
An unsaturated copolymer based on olefin which is superior in dynamic fatigue resistance (flexural fatigue resistance), weatherability, fastness to ozone, stability in thermal aging and exhibits...
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5739225 |
Process for preparing olefin polymer, and ethylenic polymer
An olefin polymer is prepared by homopolymerizing an olefin or copolymerizing two different olefins or an olefin and another polymerizable unsaturated compound in the presence of a polymerization...
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5733980 |
Ethylene α-olefin block copolymers and methods for production thereof
This invention relates to block polymers containing both crystalline and elastomeric blocks, the block copolymer having an A block and a B block. The A block is a polyethylene or an ethylene...
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5731395 |
Functional group-containing porous resin and a process for its preparation
A functional group-containing porous resin prepared by polymerization of a monomer mixture of, based on 100% by weight of the total amount of the monomers, 15 to 97% by weight of divinylbenzene, 0...
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5708112 |
Styrene copolymers, polystyrene compositions, and injection-molded articles
Disclosed are a styrene copolymer having a weight average molecular weight of about 200,000 to 2,000,000, having 1 to 20 branching points in the Z-average molecular weight, and having a methyl...
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5698651 |
Ethylene copolymer rubber, vulcanizable rubber composition containing the copolymer rubber, and process for preparing the copolymer rubber
Disclosed is an ethylene copolymer rubber which is a random copolymer rubber of (a) ethylene, (b) an α-olefin of 3 to 20 carbon atoms, (c) a nonconjugated polyene containing, in one molecule, one...
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5696214 |
Process for preparing ethylene-α-olefin-nonconjugated polyene random copolymer
Disclosed is a process for preparing an ethylene-α-olefin-nonconjugated polyene random copolymer comprising random copolymerizing (a) ethylene, (b) an α-olefin of 3 or more carbon atoms and (c) a...
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5670595 |
Diene modified polymers
Diene modified polymers are provided as well as methods for preparing the same. The polymers have from 3-8 carbon atoms, from about 0.00005 to about 5 mole percent diene based on the total weight...
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5670588 |
Process for the polymerization of olefinic hydrocarbons
A catalyst component is disclosed for use in the homo- or copolymerization of olefinic hydrocarbons. The catalyst component is comprised of a first compound of the formula Me 1 (OR 1 ) p R 2 q X...
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5668232 |
Process for the production of polyisoolefins
Polyisoolefins are obtained using the process according to the invention by polymerising isoolefins, optionally with conjugated or unconjugated dienes and/or cationically polymerisable, mono- or...
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5646224 |
Rubber composition
A rubber composition excellent in shape-retainability also in processibility, compression set and the like, which comprises a single ethylene-α-olefin-non-conjugated diene copolymer which has (1)...
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5633334 |
Ethylene-vinyl acetate emulsions with an improved balance of adhesive properties
A process for the preparation of emulsion polymers comprising 70 to 95% by weight of a vinyl ester and 5 to 30% by weight ethylene, the polymerization being carried out in the presence of 2 to 8%...
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5625016 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
High temperature solution polymerization process
This invention is a solution process for the preparation of high molecular weight ethylene-α-olefin-diolefin copolymers comprising contacting ethylene, one or more α-olefin monomer, and...
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5616664 |
Polymerization process with biscyclopentadienyl diene complex containing catalysts
Olefins are polymerized by the use of catalysts comprising biscyclopentadienyl, Group 4 transition metal complexes formed with conjugated dienes wherein the diene is bound to the transition metal...
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5612432 |
Sheetlike article for optical use
An optical sheetlike article possessing a glass transition point and a softening point both higher than 130° C., a modulus of elasticity when bent of more than 50 kgf/mm 2 , a double refraction...
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5587242 |
Colored polymeric dielectric particles and method of manufacture
A process for forming dielectric particles includes admixing a vinyl halide monomer and a crosslinker in a liquid dispersion medium to form a first mixture. A second mixture of an initiator and a...
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5585448 |
Process for the preparation of ethylene polymers and products obtained therefrom
Homo- and copolymers of ethylene endowed with very high molecular weights and narrow molecular weight distributions are obtainable by carrying out the polymerization reaction in the presence of a...
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5580930 |
Rubber composition for tires
Diene polymers having a high content of trans-1,4 addition and two distinct melting points in the ranges of 30° C. to 60° C. and 70° C. to 130° C. are useful as additives to tire rubbers to...
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