Abstract: A melt-mixed composition of non-melt flowable polytetrafluoroethylene (PTFE) and melt-fabricable perfluoropolymer is provided that exhibits thixotropy at increasing shear rate in the molten state and high elongation at break even at PTFE concentrations well above 4 wt %, based on the combined weight of the PTFE and the perfluoropolymer, e.g. at least 200% up to at least 30 wt % PTFE, the composition also exhibiting the structure of a dispersion of submicrometer-size particles of the PTFE in a continuous phase of the melt-fabricable perfluoropolymer.

Abstract: A heterogeneous polymer blend comprises a dispersed phase comprising a thermoplastic first polymer having a crystallinity of at least 30% and a continuous phase comprising a second polymer different from the first polymer. The second polymer has a crystallinity of less than 20% and is at least partially cross-linked.

Abstract: A polymer blend has a base and blend components. The base and blend components could be a branched slow crystallizing PET and a faster crystallizing PET, respectively. The ratio of base and blend components result in a block copolymer, the melt processing time and branching or chain extender levels can be can be tailored to impart the polymer blend with sufficient melt strength and crystallization rates, such that it is slow enough during the blow molding process to produce a clear article and yet fast enough during the subsequent PET recycling process making it suitable for extrusion processes as well as for recycling. The combination of materials can be used to form monolayer or multilayer articles.

Abstract: A method for producing an elastomeric sealing article including preparing a thermoplastic elastomeric resin composition having (a) 100 parts by weight of a hydrogenated block copolymer including at least two polymeric blocks (A) of styrene, and at least one polymeric block (B) of isoprene; (b) 70 to 130 parts by weight of an ethylene-octene copolymer including ethylene in an amount of more than 50% by weight; and (c) 30 to 60 parts by weight of polypropylene. The thermoplastic elastomeric resin composition does not contain a non-aromatic softening agent, and none of components (a), (b), and (c) is cross-linked. The method also includes molding the thermoplastic elastomeric resin composition into an elastomeric sealing article.

Abstract: A production process of a resin composition containing 100 parts by weight of a polyester fiber, 1 to 600 parts by weight of a copolymer of ethylene with a glycidyl group-carrying monomer, and 0.3 to 500 parts by weight of an unsaturated carboxylic acid-modified polyolefin resin, the process comprising steps of (1) melt-kneading the copolymer with the modified polyolefin resin, and (2) kneading the resultant melted resin with the polyester fiber at a temperature lower than a melting point of the polyester fiber.

Abstract: The present invention relates to a polyolefin composition comprising an olefin homo- or copolymer (A) in an amount of 90 wt. % or more, and an olefin homo- or copolymer (B) comprising hydrolysable silicon-containing groups, wherein olefin homo- or copolymer (B) is present in the composition in an amount of from 0.01 to 2 wt. %.

Abstract: Modular plastic structural composites formed from a mixture of (A) high density polyolefin and one or both of: (B) a thermoplastic-coated fiber material, or (C) polystyrene, poly(methyl methacrylate), or a combination thereof. Composites molded in the form of I-Beams and bridges constructed therefrom are also disclosed.

Abstract: Disclosed herein are various processes, including but not limited to a continuous process for making an elastomer composition having a Mooney Viscosity (ML (1+4) @125° C.) of from 16 to 180, the composition including a first polymer and a second polymer, the process comprising: polymerizing a first monomer system that includes propylene and one or both of ethylene and propylene in a solvent using a first catalyst system in a first polymerization zone to provide a first polymer, having 60 wt % or more units derived from propylene, including isotactically-arranged propylene-derived sequences and further having a heat of fusion less than 45 J/g or a melting point less than 105° C. or both and a Mooney Viscosity (ML (1+4) @125° C.

Abstract: A process for fluid phase in-line blending of plasticized polymers is provided.

Abstract: The invention provides a molded polymer material which is obtained by subjecting a polymer composition that includes (A) at least one polymer containing ?,?-ethylenically unsaturated carboxylic acid, (B) at least one diene polymer, (C) at least one metal cation source, and (D) at least one organic peroxide, and has a chemical structure arrived at by neutralizing some or all of the carboxyl groups in component A with component C in the presence of component B, to molding and crosslinking under the influence of radicals generated by decomposing component D. The molded polymer material has a high resilience, a high hardness and a good durability, making it well-suited for use in golf balls.

Abstract: A process is described for producing a polymer blend comprising (a) a first polymer component comprising a crystalline propylene polymer and (b) a second polymer component comprising a copolymer of propylene with at least one comonomer, wherein the copolymer comprises between about 7 wt % and about 28 wt % of comonomer and the copolymer has a heat of fusion of 0.5 to 70 J/g and an mm triad tacticity of 75% or greater. The process comprises polymerizing propylene under first polymerization conditions in a polymerization reaction zone to produce a first effluent comprising a crystalline propylene polymer containing no more than 10% by weight of other monomers, the first polymerization conditions comprising a first reaction temperature between about 50° C. and about 100° C.

Abstract: A fluoroelastomer masterbatch comprising a particulate matrix material wherein the particles of the matrix material have an average size selected from the range of from 1 ?m to 1000 ?m in diameter, the concentration of fluoroelastomer is from about 0.2% to 40% by weight, and the fluoroelastomer is dispersed within the interstitial spaces of the particulate matrix material.

Abstract: A process for in-line blending of plasticizers and polymers is provided.

Abstract: Disclosed are a synthetic resin composition for use as building materials such as window frames, as well as a product manufactured using the same. More particularly, the synthetic resin composition comprises a tetrapolymer of acrylic rubber-styrene monomer-butadiene rubber-vinyl cyanide monomer and a styrene-vinyl cyanide copolymer having a high molecular weight and a high degree of dispersion. Unlike products manufactured using prior polyvinyl chloride (PVC), building material such as window frames manufactured using the synthetic resin composition are recyclable, and thus can contribute to a reduction in the generation of hormone-disrupting chemical dioxin, which is released in the burning thereof. Also, the resin composition can be manufactured into products having excellent properties of weather resistance and colorability without using environmental pollutants such as cadmium stearate or lead stearate, which are used as thermal stabilizers.

Abstract: A process for producing thermoplastic vulcanizates, the process comprising (i) dynamically vulcanizing a rubber with a curative in a first stage, where the rubber is within a blend that includes the rubber, a thermoplastic resin, and the curative, where said step of dynamically vulcanizing occurs at a temperature at or above the melting point of the thermoplastic resin, where said step of dynamically vulcanizing employs a peroxide curative, and where said rubber includes polymeric units deriving from 5-vinyl-2-norbornene, (ii) continuing said step of dynamically vulcanizing to cause phase inversion of the blend to thereby convert the thermoplastic resin into a continuous phase, (iii) maintaining the blend at or above the melting point of the thermoplastic resin after the phase inversion, and (iv) introducing molten thermoplastic resin into the blend in a second stage, where said step of introducing molten thermoplastic resin occurs after phase inversion but before the blend is cooled to a temperature below th

Abstract: New polymer concentrates on the basis of polymer additives, like e.g. fillers and flame-retardants, are provided which have in particular an increased bulk density compared to the polymer additives as such. This increased bulk density leads to a substantial improvement in the processability of such concentrates, their dispersibility during compounding and the properties of the resulting polymer compound. Processing improvements include less dust, faster processing and more homogeneous additive dispersion. The invention also provides a process for preparing such new polymer concentrates, a process for preparing polymer compounds containing the new polymer concentrates, the respective polymer compounds and a process for preparing formed parts thereof. Such formed parts have more uniform properties such as density, wall thickness, and in case of the flame-retardants more homogeneous and consistent flame retardancy.

Abstract: Processes for producing blends of a first polymer component and a second polymer component are provided. The first polymer component and the second polymer component are blended in an internally agitated mixer such as a devolatizer in the presence of at least one solvent. Blending the polymers in this manner results in an intimate mixing of the first and second polymers, providing beneficial performance characteristics. In one embodiment, the first polymer incorporates at least 75 wt. % of propylene-derived units wherein the propylene-derived units have an isotactic triad fraction of about 65% to about 99% and wherein the first polymer has a heat of fusion of less than 75 J/g. In this embodiment, the second polymer is selected from polypropylenes, low density polyethylenes, high density polyethylenes, polystyrenes, polyamides, polycarbonates, and polyesters.

Abstract: Disclosed is a rubber-modified styrene-based resin comprising a styrene-based polymer forming a matrix and rubber-like polymer particles dispersed in the matrix like islands, each of the rubber-like polymer particles having a cross sectional structure where the styrene-based polymer particles are contained like islands-sea, wherein the rubber-modified styrene-based resin is constituted of 1-10 wt % of the rubber-like polymer and 99-90 wt % of the styrene-based polymer; the particle-diameter of the rubber-like polymer particle falls within a range of 1.0 to 5.0 ?m; and a value of (styrene-based polymer weight/rubber-like polymer weight) in a methylethylketone-insoluble matter of the rubber-modified styrene-based resin falls within a range of 0.5 to 1.5.

Abstract: The present invention provides coating compositions that include reactive diluents and have high performance, low VOC levels, and low irritation levels.

Abstract: The present disclosure is directed to polymeric compositions which form gloss resins suitable for thermoforming applications. The polymeric compositions include a reaction product composed of a clarified random propylene/?-olefin copolymer, a coupling agent, and optionally an elastomer. Methods for adjusting the melt flow rate of the gloss resin are also disclosed. Adjustment of the gloss resin melt flow rate advantageously enables scrap thermoplastic material containing the gloss resin to be recycled in a thermoforming operation.

Abstract: Regrind is mixed with at least one low density metallocene polyethylene to increase the amount of regrind that can be used in a thermoformed article.

Abstract: A vulcanized fluoro rubber is provided by vulcanizing a composition comprising 100 parts by mass of mixture in which a raw fluoro rubber (A) in which appropriate amount of vulcanizing agent has been previously compounded and a raw fluoro rubber (B) in which the vulcanizing agent is not compounded are mixed at a rate of 8/2 to 3/7, 1 to 10 parts by mass of an acid acceptor and 0 to 5 parts by mass of another compounding agent which is compounded as needed. Number average molecular weight of each of the raw fluoro rubber (A) and the raw fluoro rubber (B) is 3.5×104 to 2.0×105.

Abstract: Disclosed is a composition, which may be melt extrudable, comprising polyvinylpyrrolidone-iodine complex in at least one polymer. Also disclosed is a process for preparing the composition or shaped articles, including films, made therefrom. The composition can be extruded, blown film extruded, or molded into films, fibers, tubing, and shaped articles thermoformed or molded shapes, including containers, usable, for instance, as catheters, in delivery systems for drugs and nutrients, specimen containers, or surgical devices.

Abstract: A process for the preparation of dynamically vulcanized thermoplastic elastomers comprising melt processing under shearing conditions in melt reaction extruder, A) at least one thermoplastic resin, B) at least one vulcanizable gas-phase elastomer having a Mooney viscosity (ML.sub.1+4(125° C.)) of from about 65 to about 450, C) a curing agent or agents, and D) process oil, wherein said process oil D) is added to the extruder in at least three oil injection positions located a) at least one location before or within the first 15% of the total length of the extruder; b) at least one other location prior to, at or within 10% total extruder length after the onset of the vulcanization of said gas-phase elastomer; and c) at least one location subsequent to the location of the point at which the vulcanization of said gas-phase elastomer is substantially completed.

Abstract: A method for producing a masticated rubber, which comprises the steps of masticating rubber at a shear rate of from 500 to 4,500 (l/s); and obtaining masticated rubber having a weight-average molecular weight of from 100,000 to 1,300,000.

Abstract: The present invention provides coating compositions that include reactive diluents and have high performance, low VOC levels, and low irritation levels. Certain embodiments of the present invention include water and water-dispersible polymers and other embodiments do not include water.

Abstract: A thermoplastic vulcanizate comprising of a dynamically-cured rubber; and a thermoplastic phase, where the thermoplastic phase includes fiber and the reaction product of a methylene donor and a methylene acceptor. The thermoplastic phase could include a functionalized thermoplastic resin.

Abstract: The present invention relates to novel compositions comprising (a) anionic block copolymers of mono alkenyl arenes and conjugated dienes, and (b) tailored softening modifiers have a particular polydispersity index that results in a surprising improvement in properties for the composition. Also included are processes for the manufacturing such novel compositions and various end-uses and applications for such compositions.

Abstract: The invention provides a process for dynamic vulcanization comprising grafting organic silane on disperse phase component, thereby introducing chains into the component which are cross-linkable in the presence of cross-linking agents when the component is molten. The invention further provides thermoplastic vulcanizates having superior properties, including high flexibility and impact resistance, low hygroscopicity, non-toxicity, and excellent processability.

Abstract: An article suitable for use as an insulating or coating material comprises a radiation-crosslinked composition comprising a polyethylene, a polypropylene and optionally an ethylene-propylene elastomer. The polyethylene component is selected from high density polyethylene (HDPE), medium density polyethylene (MDPE) and linear medium density polyethylene (LMDPE) and the polypropylene component is either a homopolymer or copolymer. The composition is predominantly based on the polyethylene component and contains the polyethylene component in an amount of at least 50 percent by weight. The article is radiation-crosslinked to a sufficient degree that it possesses thermoset properties, such that when the article is heated to a temperature above the crystalline melting point of the polypropylene homopolymer or copolymer, it is softened but does not become liquid.

Abstract: Disclosed is a composite material comprising: resin (I) comprising 10 to 99% by weight of a crystalline thermoplastic resin which is defined as component (A), and 1 to 90% by weight of a crystalline thermoplastic resin having a crystallization temperature lower than that of component (A) by at least 10° C., which resin is defined as component (B), and 5 to 400 parts by weight, based on 100 parts by weight of the resin (I), of fiber, which is defined as component (C), wherein the contents of the component (A) and the component (B) are each based on a combined content of these two components.

Abstract: Disclosed is a thermoplastic elastomer composition comprising 100 parts by weight of EPDM rubber, 5-1,000 parts by weight of styrenic thermoplastic elastomer, 50-3,000 parts by weight of paraffin oil, 10-200 parts by weight of a polyolefin resin as a curative, 1-15 parts by weight of a phenolic resin, and 0.5-5 parts by weight of a curing activator. The composition is superior in flowability, mechanical properties and oil resistance as well as being low in hardness, so that it can be applied for automobile parts.

Abstract: Processable rubber compositions contain a vulcanized elastomeric material dispersed in a matrix of a thermoplastic polymeric material. The vulcanized elastomeric material is a peroxide cure polymeric material containing repeating units derived from fluorine-containing monomers and at least one peroxide cure site monomer. In one embodiment the matrix forms a continuous phase and the vulcanized elastomeric material is in the form of particles forming a non-continuous phase. The compositions are made by combining a radical curing system, a fluorocarbon elastomer material, and a fluoroplastic material, and heating the mixture at a temperature and for a time sufficient to effect vulcanization of the elastomeric material, while mechanical energy is applied to mix the mixture during the heating step. Shaped articles may be readily formed from the rubber compositions according to conventional thermoplastic processes such as blow molding, injection molding, and extrusion.

Abstract: An article suitable for use as an insulating or coating material comprises a radiation-crosslinked composition comprising a polyethylene, a polypropylene and optionally an ethylene-propylene elastomer. The polyethylene component is selected from high density polyethylene (HDPE), medium density polyethylene (MDPE) and linear medium density polyethylene (LMDPE) and the polypropylene component is either a homopolymer or copolymer. The composition is predominantly based on the polyethylene component and contains the polyethylene component in an amount of at least 50 percent by weight. The article is radiation-crosslinked to a sufficient degree that it possesses thermoset properties, such that when the article is heated to a temperature above the crystalline melting point of the polypropylene homopolymer or copolymer, it is softened but does not become liquid.

Abstract: A polymer or blend is described which contains at least one acrylic resin or vinyl resin having at least one ionic or ionizable group, and at least one additional polymer. The polymer has small domain sizes with respect to the acrylic resin or vinyl resin. The polymer preferably has improved conductivity when formed into a film. Preferably, the polymers are useful in a variety of applications including in the formation of a membrane which is useful in batteries and fuel cells and the like. Methods of making the polymer blends are also described.

Abstract: Adhesive compositions that include: a first component that includes a polymeric adhesive material that is a solid at room temperature; a second component that is a different material than the first component and is a solid at room temperature; and a third component that is a liquid at room temperature. The adhesive compositions are in the form of (i) a liquid dispersion when stored at temperatures from about room temperature up to about 140° F., (ii) a molten blend when heated above about 300° F. and mixed, and (iii) a solid adhesive when the molten blend cools to a temperature below about 140° F. The second component substantially minimizes exuding of the liquid from the solid adhesive.

Abstract: A polymer blend including: (i) a fluoroolefin polymer prepared by a process, including contacting in a first reaction zone an initiator, 2,3,3,3-tetrafluoro-1-propene, and optionally, at least one first ethylenically unsaturated comonomer capable of copolymerizing therewith, wherein contacting is carried out at a first temperature, pressure and length of time sufficient to produce the fluoroolefin polymer; and (ii) an acrylic polymer prepared by a process, including contacting in a second reaction zone an initiator, at least one acrylic monomer selected from the group consisting of: acrylic acid, methacrylic acid, acrylate ester, methacrylate ester, and a mixture thereof, and optionally, at least one second ethylenically unsaturated comonomer capable of copolymerizing therewith, wherein contacting is carried out at a second temperature, pressure and length of time sufficient to produce the acrylic polymer. Processes for preparing the polymer blends are also provided.

Abstract: An object of the present invention is to provide a thermoplastic resin composition, an extruded sheet and a copper clad laminate excellent in processability such as extrusion processability and injection moldabilities, solder heat resistance and mechanical properties such as bending properties, durability and drilling processability and satisfying low dielectric loss necessary for high frequency band telecommunication parts. The present invention relates to a shaped article composed of a resin composition prepared by adding a specific graphite to a resin composition containing (a) a polyarylene sulfide resin and (b) a polyphenylene ether resin as main components, and a multilayer extruded sheet comprising an inner layer of a resin composition prepared by adding a metal oxide to a resin composition containing (a) a polyarylene sulfide resin and (b) a polyphenylene ether resin as main components and an outer layer of a resin composition to which no metal oxide is added.

Abstract: A polymer blend has a base and blend components. The base and blend components could be a branched slow crystallizing PET and a faster crystallizing PET, respectively. The ratio of base and blend components result in a block copolymer, the melt processing time and branching or chain extender levels can be can be tailored to impart the polymer blend with sufficient melt strength and crystallization rates, such that it is slow enough during the blow molding process to produce a clear article and yet fast enough during the subsequent PET recycling process making it suitable for extrusion processes as well as for recycling. The combination of materials can be used to form monolayer or multilayer articles.

Abstract: Disclosed herein is a multimodal polymer composition comprising 45 to 75 wt % of a first polymer fraction, 25 to 55 wt % of a second polymer fraction, and from 10-50 phr of an extender oil. The multimodal polymer composition has an overall Mooney viscosity of less than 90 ML(1+4@125° C.), and each polymer fraction comprises an ethylene, C3-C10 alpha-olefin, non-conjugated diene polymer, wherein the first polymer fraction has a Mooney viscosity of greater than or equal to about 150 ML(1+4@125° C.), the second polymer fraction has a Mooney viscosity from about 20 to about 120 ML(1+4@125° C.). A process for making the multimodal polymer composition comprising a process utilizing two or more reactors in series is also disclosed.

Abstract: Methods are provided for making a solution masterbatch containing a diene elastomer in an organic solvent and a reinforcing silica filler dispersed therein, comprising the steps of (a) mixing a precipitated silica having an average particle size substantially equivalent to an average particle size of a powdered silica, with a diene elastomer in a first organic solvent; and (b) desolventizing the mixture to form a solution masterbatch preparation. The use of such desolventized solution masterbatches in vulcanizable rubber compounds results in excellent processing characteristics with improved dispersion of fillers, including polymeric nanoparticles. The compounds also demonstrate improved properties, including reduced hysteresis.

Abstract: Branched polyarylene polymers are provided comprising monovalent endcappers, divalent linear units, and polyvalent branching units. The composition of the polymers is controlled by adjusting the ratio of the three types of monomers.

Abstract: A process is described for the preparation of viscosity index improver (V.I.I.) additives which includes treatment under high shear conditions of a composition comprising (i) one or more EP(D)M polymers and (ii) one or more polyvinylarene/hydrogenated conjugated diene/polyvinylarene block copolymers, the weight ratio (i)/(ii) ranging from 98:2 to 80:20, preferably from 97:3 to 90:10, the above process being carried out at a temperature ranging from 150° C. to 400° C., preferably from 180° C. to 320° C.

Abstract: A water-based emulsion for vibration damper is provided for the formation of an excellent vibration damper. In an aspect, the emulsion for vibration damper contains a particle including a core part formed of an acrylic copolymer (A) and a shell part formed of an acrylic copolymer (B) which covers the core part, the glass transition point of the acrylic copolymer (B) being not lower than ?9° C., and the difference between the glass transition point of the acrylic copolymer (B) and the glass transition point of the acrylic copolymer (A) being not less than 20° C.

Abstract: A process for production of a thermoplastic elastomer composition by melt-kneading a mixture in one step to thereby conduct dynamic crosslinking, wherein the mixture comprises a hydrogenated block copolymer (a1) which is prepared by hydrogenating a block copolymer comprising a vinyl aromatic polymer block (A1) and a conjugated diene polymer block (B1) and has number-average molecular weight of 200000 or above and, if necessary, a non-hydrogenated block copolymer (a2) comprising a vinyl aromatic polymer block (A2) and a conjugated diene polymer block (B2), and contains a non-aromatic rubber softening agent (b), a peroxide-crosslinkable olefin resin (c) having a density of 0.94 g/cm3 or above, a peroxide-decomposable olefin resin (d), an organic peroxide (e), and a crosslinking aid (f), the amount of (b) being 50 to 250 parts by mass per 100 parts by mass of the sum of (a1) +(a2), the amount of (c) being 2.5 to 50 parts by mass per 100 parts by mass of (a); and the amount of (d) being 0.

Abstract: The present invention relates to a thermoplastic elastomer composition comprising: (a) a block copolymer having a weight-average molecular weight of 80,000 to 1,000,000 which is represented by the general formula (I): A(B-A)n, and/or (A-B)n??(I) wherein A is a block of a polymer of a vinyl aromatic hydrocarbon; B is a block of an elastomeric polymer; and n is an integer of 1 to 5, and/or a hydrogenated block copolymer obtained by hydrogenating said block copolymer; (b) a softening agent for hydrocarbon-based rubbers; and (c) an olefin-based resin, said component (a) being contained in an amount of 20 to 80% by weight, and said component (b) being contained in an amount of 20 to 80% by weight, both based on a total weight of the components (a) and (b), and said component (c) being contained in an amount of 1 to 300 parts by weight based on 100 parts by weight of a total amount of the components (a) and (b), and a sheet comprising the thermoplastic elastomer composition and a laminate including the sheet.

Abstract: A gasket for fuel cells and a fabrication method of the same have two or more rubber powders having different hardness are coated onto a rigid substrate together with a liquid rubber, for example by a spray method, for thereby implementing a repulsive elastic property of a rubber coated portion and a sealing property. The cell intervals are constantly maintained by using a rigid plate as a spacer. Since a rigid frame provides a consistent distance during stack manufacture and engagement, stack workability and productivity are enhanced.

Abstract: A fluoroelastomer composition contains a peroxide-curable solid fluoroelastomer and a peroxide curative agent combined therewith, and, a bisphenol-curable liquid fluoroelastomer and a bisphenol curative agent combined therewith. The solid fluoroelastomer/peroxide curative when combined with the liquid fluoroelastomer/bisphenol curative results in a composition exhibiting improved polymeric properties including improved flowability at room temperature and improved fluid resistance and sealability at a wide range of temperatures.

Abstract: Heat-settable epoxy resin mixtures are provided that can be used alone or in combination with fibers to form large composite material structures without the need for high consolidation pressures. The heat-settable resin mixture is composed of a resin component, curing agent component and a particulate component. The particulate component includes rigid-rod polymer particles that dissolve when the heat-settable resin is heated to temperatures within a predetermined processing window. After heating to the processing temperature, the resulting heat-set resin is cooled to form a curable solid resin. The curable solid resin may be stored indefinitely or re-heated to curing temperatures to form a cured product.

Abstract: Methods of improving the extrusion properties in an extrudate are provided. The methods include blending a major amount of a first fluoropolymer containing a semi-crystalline fluorinated copolymer and a minor amount of a second fluoropolymer effective to improve extrusion properties in the composition, and melt processing the blend to form the extrudate.