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8143352 |
Process for fluid phase in-line blending of polymers
A process for fluid phase in-line blending of polymers. The process includes providing two or more reactor trains configured in parallel and a separator for product blending and product-feed...
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8138264 |
Bimodal polyethylene resins that have high stiffness and high ESCR
A bimodal polyethylene having a high density ranging from about 0.955 to about 0.959 g/cc, an improved environmental stress cracking resistance (ESCR) of from about 400 to about 2500 hours, and an...
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8138269 |
Polypropylene ethylene-propylene copolymer blends and in-line process to produce them
Isotactic polypropylene ethylene-propylene copolymer blends and in-line processes for producing them. The blends may have between 1 and 50 wt % of isotactic polypropylene with a melt flow rate of...
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8124709 |
Ethylene/α-olefin block interpolymers
Embodiments of the invention provide a class of mesophase separated ethylene/α-olefin block interpolymers with controlled block sequences. The ethylene/α-olefin interpolymers are characterized by a...
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8106139 |
Propylene/alpha-olefin block interpolymers
Embodiments of the invention provide a class of mesophase separated propylene/α-olefin block interpolymers with controlled block sequences. The propylene/α-olefin interpolymers are characterized b...
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8084544 |
Process for production of water-absorbing resin
Process for preparing a water-absorbent resin comprising carrying out a reversed-phase suspension polymerization in multi-steps of two or more steps. The water-absorbent resin is prepared by...
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8080610 |
Monomer recycle process for fluid phase in-line blending of polymers
A monomer recycle process for fluid phase in-line blending of polymers is provided. In one form, the monomer recycle process includes providing a first group (G1) of one or more reactor trains and...
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8053529 |
Catalytic olefin block copolymers with controlled block sequence distribution
A process for the polymerization of one or more addition polymerizable monomers and the resulting polymer products, said process comprising: 1) contacting an addition polymerizable monomer or...
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8025847 |
Slurry loop reactors
Reactor systems suitable for the polymerization of an olefin monomer including first and second loop reactors effective for the polymerization of an olefin monomer and polymers formed therefrom are...
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7989551 |
Pseudo-block copolymers and process employing chain shuttling agent
A process for the polymerization of one or more addition polymerizable monomers to form a copolymer comprising multiple regions or segments of differentiated polymer composition or properties...
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7985799 |
Polymerization process for preparing polyolefin blends
A process for preparing polyolefin blends comprising: a) polymerizing in a solution phase propylene or 1-butene to prepare a polymeric solution containing a semicrystalline polymer component;b)...
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7981982 |
Process for the preparation of soft propylene polymer compositions
A process for the preparation of a propylene copolymer composition having a Flexural modulus lower than 500 MPa, a total ethylene content higher than 9% and a Xylene soluble fraction at room...
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7947783 |
Polyethylene composition for injection moulding with improved stress crack/stiffness relation and impact resistance
The present invention relates to a polyethylene composition wherein (i) the composition has an MFR2 of 0.05 to 100 g/10 min, (ii) the environmental stress crack resistance ESCR measured in hours...
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7928162 |
In-line process for producing plasticized polymers and plasticized polymer blends
A process for fluid phase in-line blending of plasticized polymers is provided. The process includes providing two or more reactor trains configured in parallel and a separator for product blending...
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7910637 |
In-line blending of plasticizers with a base polymer
A process for in-line blending of plasticizers and polymers is provided. The process includes providing a single reactor train including one or more serially configured reactors, a high-pressure...
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7910662 |
Halogenation processes
The invention discloses improved processes to halogenate polymers. In particular, the invention discloses to improved processes to halogenate polymers made from C4-1012 isoolefins.
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7872071 |
Polyethylene molding composition for coating steel pipes
The invention relates to a polyethylene molding composition which has a multimodal molar mass distribution and is particularly suitable for producing protective coatings on steel pipes. The molding...
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7851550 |
Method for surface crosslinking water-absorbing resin and method for manufacturing water-absorbing resin
A method for surface crosslinking water-absorbing resin of the present invention includes a step (1) of obtaining a wet mixture, a step (2) of obtaining a dried particulate composition, and a step...
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7816447 |
Reactor systems and polymerization processes using multi-zone circulating reactors
The invention relates to the production of polymers using polymerization processes and reactor systems including a plurality of multi-zone circulating reactors. In particular, the invention relates...
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7799866 |
Method for producing propylene-ethylene block copolymer
The method for producing a propylene-ethylene block copolymer in accordance with the present invention has: a first polymerization process which is performed using two or more polymerization tanks...
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7795359 |
Continuous process for production of polymeric materials
The invention provides a continuous-flow process for producing a polymeric material. The process of the invention comprises the steps of: introducing at least two solutions, each comprising one or...
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7737222 |
Pressureless polymer pipe
A pressureless pipe and polymer composition for making such a pipe as well as the use of the polymer composition for pressureless pipes and supplementary parts, are disclosed. The polymer...
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7728077 |
Polyolefin masterbatch and composition suitable for injection molding
A masterbatch composition comprising (percent by weight): A) 15%-50% of a polypropylene component having a melt flow rate of from 1 to 250 g/10 min.; and B) 50%-85% of an olefin polymer partially...
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7700023 |
Method for producing an environment protective foamed thermoplastic resin polymer
A method for producing an environment protective foamed thermoplastic resin polymer comprises using an extruder with a helical rod to be driven to rotate. The extruder has a feeding section, a...
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7687588 |
Process for the gas-phase polymerization of olefins
A process for the gas-phase polymerization of α-olefÊns CH2═CHR, where R is hydrogen or a hydrocarbon radical having 1-12 carbon atoms, carried out in a first and a second interconnected pol...
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7683141 |
Polymer film comprising a propylene random copolymer
The present invention relates in a first embodiment to a polymer film comprising a propylene random copolymer with a total comonomer content of 4.5 to 12 mol % wherein the sealing initiation...
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7662892 |
Impact copolymers
This invention relates to a continuous process to prepare olefin impact copolymers comprising producing a semi-crystalline olefin polymer in a first reactor and then transferring the reactor...
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7649052 |
Impact resistant polyolefin compositions
A heterophasic polyolefin composition comprising: (A) 50-0% of a crystalline propylene polymer;(B) 5-20% of a first elastomeric copolymer of ethylene with at least a C3-C8 α-olefin comonomer; ...
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7645835 |
High density ethylene homopolymers and blend compositions
Blend compositions containing a novel homopolymer, the use of which allows the incorporation of more comonomer in the additional components of the blend (for the same overall density) resulting in...
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7601787 |
Ethylene polymerization process
A process for polymerizing ethylene is disclosed. The polymerization is performed in the presence of a Ziegler-Natta catalyst system in two slurry reaction zones. Most of the polyethylene (70-95...
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7579422 |
Propylene random copolymer and process for the production thereof
The present invention relates to a process for preparing a propylene random copolymer comprising polymerization of propylene with a comonomer, said comonomer being ethylene or an α-olefin ...
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7576166 |
Process for the production of linear low-density polyethylene composition
A process for producing bimodal linear low-density polyethylene polymer compositions, useful for making films. The polymer compositions have a melt flow rate MFR2 of 0.4 to 1.0 g/10 min and a...
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7531605 |
Process for producing polyolefin resin composition and polypropylene composition
A process for producing a polyolefin-based resin composition comprises, in the first polymerization stage, polymerizing an α-olefin having 4 to 20 carbon atoms, a styrene or a cyclic olefin in the ...
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7524903 |
Process and apparatus for the polymerization of propylene
A process for preparing heterophasic propylene copolymers by polymerizing propylene in the presence of a polymerization catalyst and hydrogen as a molecular weight regulator, the process comprising...
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7524897 |
Film with high impact strength
A film with a broad molecular weight distribution, excellent impact strength and a high dart drop value or moderate dart drop value accompanied by good optical property consisting of a bimodal...
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7521507 |
Polypropylene-based adhesive compositions
An adhesive blend is described that can include a semi-crystalline copolymer of propylene and at least one comonomer selected from the group consisting of ethylene and at least one C4 to C20...
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7488774 |
Reactor system for the production of high impact polystyrene
A continuous process for producing high impact polystyrene comprising feeding at least one vinyl aromatic monomer, an elastomer, and a free radical initiator to a first linear flow reactor to form...
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7482406 |
Impact resistant polyolefin compositions
Olefin polymer composition comprising (by weight, unless otherwise specified): A) 60-95% of a propylene homopolymer or copoloymer having a Polydispersity Index (P.I.) value of from 4.6 to 10 and a...
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7470756 |
Propylene random copolymer and process for the production thereof
The present invention relates to a process for preparing a propylene random copolymer comprising polymerisation of propylene with a comonomer, said comonomer being ethylene or an α-olefin ...
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7449527 |
Polyolefin production
Provided is a process for producing a polyolefin having a multimodal molecular weight distribution, which process comprises: (a) polymerizing a first olefin monomer in the presence of an...
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7442743 |
Propylene polymer resin with improved properties
The present invention relates to a process for the production of a propylene polymer in a multistage polymerization process comprising the polymerisation of propylene in the presence of a catalyst...
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7427649 |
Polyethylene blow molding composition for producing small containers
The invention relates to a polyethylene composition with multi-modal molecular mass distribution, which is particularly suitable for blow molding of small containers with a volume in the range of...
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7423098 |
Polyethylene process
An ethylene polymerization process is disclosed. Ethylene is polymerized in two slurry reaction zones with a C6-C10 alpha-olefin in the presence of a single-site catalyst capable of making a high...
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7378472 |
Injection moulding polymer
The use of a multimodal polyethylene composition comprising as comonomers to ethylene at least two C4-12 alpha olefins in injection molding.
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7365136 |
High melt strength polypropylene
The present invention concerns a high melt strength propylene polymer or copolymer suitable for manufacturing foams and thermoformed product exhibiting a melt strength of at least 3 g and...
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7351776 |
Bulk polymerization process
A method for the continuous production of polydienes, the method comprising the steps of (a) charging a mixture of one or more monomer, catalyst system, and less than 50% weight percent organic...
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7351777 |
Retarded anionic polymerization of vinyl aromatic monomers using insoluble or heterogeneous retardants
This invention is a process to manufacture high quality vinyl aromatic polymer that is essentially free of unreacted vinyl aromatic monomer using retarded anionic polymerization wherein the...
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7348381 |
High modulus, high ductility polyolefins
Provided herein are propylene polymers which are capable of being used as thermoplastic polyolefins just as they emerge from the reactor system described, without further compounding of components...
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7345116 |
Clear polycarbonate polyester blend
An optically clear thermoplastic resin composition is disclosed which comprises structural units derived from substituted or unsubstituted polycarbonate and substituted or unsubstituted polyester,...
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7312277 |
Mass polymerized rubber-modified monovinylidene aromatic copolymer composition
Disclosed is a mass polymerized rubber-modified monovinylidene aromatic copolymer composition with an excellent balance of physical and mechanical properties especially low temperature impact, and...
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