Abstract: The present invention is a thermoplastic elastomer (TPE) composition comprising crosslinked elastomeric PVB and a thermoplastic polymer, and a process for making said TPE composition.

Abstract: A modified pressure sensitive adhesive (PSA) is produced by polymerizing at least one ethylenically unsaturated monomer to form a base polymer and reacting the base polymer with a modifying polymer comprising units derived from a n-vinyl lactam to thereby produce a modified polymer. The modified polymer can be used to form modified PSAs having improved adhesion properties over PSAs formed from the unmodified base polymer.

Abstract: The present invention provides a rubber composition which when vulcanized may be used to form a safety support intended to be mounted on a wheel rim within a tire. The invention also is directed to such a support, capable of supporting a tread of the tire in the event of a drop in inflation pressure, and to a mounted assembly comprising this support. A rubber composition according to the invention comprises (phr: parts by weight per 100 parts of diene elastomer(s)): (a) a diene elastomer, (b) particles of an &agr;-olefinic thermoplastic polymer having a melting point greater than or equal to 150° C., in an amount of 5 to 30 parts by weight per 100 parts diene elastomer (phr), wherein the mean size by weight of the particles is between 50 &mgr;m and 500 &mgr;m, (c) greater than 60 phr of reinforcing filler, and (d) from 3 to 8 phr of sulphur.

Abstract: This invention relates to a mixture containing one or more olefin rubbers and one or more nitrile rubbers, to a process for the production thereof, to a vulcanizable mixture and to a process for the production thereof as well as to moldings of all kinds producible from the mixtures.

Abstract: Branched crystalline polypropylene compositions and methods for the preparation of branched crystalline polypropylene compositions are provided. For example, described herein is a process of preparing a branched crystalline polypropylene composition that includes combining two or more different metallocene catalyst compounds with a polymerization medium that includes propylene, for a time sufficient to provide branched crystalline polypropylene that has from 0.0 wt % to 2.0 wt % ethylene and a heat of fusion of 70 J/g or more.

Abstract: Compositions comprising (A) non-branched polybutadiene having terminal hydroxyl functionality less than 2 per molecule by average; and (B) branched polybutadiene having terminal hydroxyl functionality more than 2 per molecule by average; the weight ratio of (A) to (B) being about 99:1 to 1:99. These compositions are reacted with organic polyisocyanates to form prepolymers which are cured by reaction with a chain extender such as a diol to produce cured resins which exhibit unexpectedly improved tear strength properties and themoplasticity with high modulus, and improved tackiness and shelf life for hot melt adhesives. The prepolymers have lower viscosity and better storage stability as compared with those from conventional branched polybutadienes of the (B) type. Alternatively, the compositions can be cured directly in a one-shot reaction with diisocyanates to form a polyurethane with the described combination of properties.

Abstract: An olefin polymer composition, which comprises a cross-linked olefin polymer composition comprising at least one cross-linking rubber like polymer (A) and an olefin resin (B), the cross-linking rubber like polymer (A) being selected from the group consisting of (1) an ethylene-&agr;-olefin copolymer, which contains an ethylene unit and an &agr;-olefin unit having 3 to 20 carbon atoms, and which is produced using a metallocene catalyst, and (2) at least one hydrogenated rubber selected from the group consisting of a homopolymer of a conjugated diene monomer and a copolymer thereof, in which rubber not less than 50% of all olefinic double bonds are hydrogenated, wherein the cross-linking rubber like polymer (A) has a weight average particle diameter of from 0.01 to 3 &mgr;m.

Abstract: The invention relates to a tire having at least one component (e.g. tread) of a rubber composition comprised of a styrene/butadiene elastomer composite comprised of a styrene/butadiene elastomer and a functionalized styrene/butadiene elastomer containing an internal silicon atom therein as a part of the elastomer, and at least one pendent silanol group and/or siloxy group from said silicon atom. Said elastomer composite is comprised of a significant polymodal (e.g. bimodal) molecular weight distribution between said styrene/butadiene elastomer and said functionalized styrene/butadiene elastomer. Said rubber composition contains synthetic, precipitated silica aggregates having hydroxyl groups on their surface which may be pre-treated (hydrophobated) to reduce hydroxyl groups contained on their surface prior to blending with said styrene/butadiene composite. Said rubber composition may contain a dispersion therein of a silica/plasticizer composite.

Abstract: The invention relates to a foil or molded body based on a transparent and high frequency weldable polymer mixture containing a) (I) a copolymer of ethylene with about 8 to 60% by weight of comonomers, selected from vinyl esters of saturated C2-C8 carboxylic acids saturated C1-C12 alkylacrylates and methacrylates, optionally with carbon monoxide as termonomer, and/or (II) ethylene homopolymer, ethylene copolymer, propylene homopolymer and/or propylene copolymer with about 8 to 60% by weight of grafted units of unsaturated carboxylic acids, dicarboxylic acids, their esters and/or anhydrides or (III) a mixture of two or more of the above mentioned compounds, independently of their allocation to groups, whereby the polymers or their mixture have a melt index MFI (190° C.; 2.16 kg) of about 0.2 to 15.0 g/10 min and b) a copolymer of ethylene with about 10 to 30% by weight of C3-C12-&agr;-olefin with a melt index MFI (190° C., 2.16 kg) of about 0.2 to 15.

Abstract: The present invention relates to an isotactic polypropylene obtained by metallocene catalysis, onto which is grafted a functional monomer. The invention also relates to a composition which may form part of the composition of a coextrusion binder. This composition according to the invention comprises isotactic polypropylene obtained by metallocene catalysis, grafted and then optionally diluted with at least one polyolefin (C1) and/or in at least one polymer of elastomeric nature (D). The invention also relates to a multilayer structure comprising a layer (L) comprising the above binder, and, directly attached thereto, a layer (E): which is polar, nitrogenous or oxygenated, such as a layer of polyamide resin, of ethylene/saponified vinyl acetate copolymer (EVOH) or of polyester; or of a mineral oxide deposited on a polymer such as polyethylene (PE), polyethylene terephthalate (PET) or EVOH; or which is metallic or metalloplastic.

Abstract: A resin composition comprising the following components (A), (B) and (C), wherein the content of component (A) is from 10 to 90 wt %, component (B):component (C)=from 10:1 to 1:5 (weight ratio), the intrinsic viscosity [&eegr;] is in the range from 0.17 to 0.40 m3/kg, and the density is in the range from 935 to 968 kg/m3: Component (A): a homopolymer of ethylene or a copolymer of ethylene having an &agr;-olefin content of from 0 to 0.5 wt %, and an intrinsic viscosity [&eegr;] of from 0.035 to 0.17 m3/kg, Component (B): a homopolymer of ethylene or a copolymer of ethylene having an &agr;-olefin content of from 0 to 0.5 wt %, and an intrinsic viscosity [&eegr;] of from 0.2 to 1.0 m3/kg, and Component (C): a copolymer of ethylene having an &agr;-olefin content of from 0.7 to 15 wt %, and an intrinsic viscosity [&eegr;] of from 0.2 to 1.0 m3/kg.

Abstract: The present invention is a composition and a method of forming a composition, the composition comprising at least a halogenated elastomer and an amine or phosphine. An additional rubber component may be present in the composition of the invention. In one embodiment, the halogenated elastomer is a isoolefin copolymer comprising a halomethylstyrene derived unit. The amine or phosphine compound is represented by the formula (R1R2R3)Q, wherein Q is a Group 15 element, and wherein R1 is either hydrogen or a C4 to C30 hydrocarbyl group, R2 is either hydrogen or a C1 to C30 hydrocarbyl group; and R3 is either hydrogen or a C1 to C30 hydrocarbyl group provided that at least one of R1, R2 and R3 is not hydrogen.

Abstract: A millable, vulcanizable elastomeric composition comprising two fluoroelastomer phases, phase 1 and phase 2, wherein fluoroelastomer phase 1 is present as crosslinked fluoroelastomer particles, and where fluoroelastomer phase 2 remains flowable until a final stage vulcanization occurs, and where fluoroelastomer phase 1 is present at between 5-85% by weight of the final composition.

Abstract: A brominated butyl rubber and a polymer based on a conjugated diolefin monomer are grafted by mixing the solid polymer at a temperature greater than 50° C. for a time sufficient to cause grafting. The grafted copolymer is useful especially in tire tread compositions.

Abstract: A polymer composition obtainable by subjecting a particular crosslinkable polymer composition to dynamic crosslinking. The crosslinkable polymer composition contains. (a) a block copolymer comprising two or more polymer blocks of a vinyl aromatic compound and one or more (hydrogenated) polymer blocks of a conjugated diene; (b) an olefin copolymer having a density of 0.88 to 0.

Abstract: A visco-elastic material useful in forming a noise and vibration damper, which includes an ethylene/methyl acrylate and/or polyacrylic elastomer, one or more modifying agents and one or more thermally-activated crosslinking agents. The material imparts excellent noise and vibration damping properties over a wide range of temperatures, and is particularly useful for damping vibrating substrates at elevated temperatures. In addition, the material can be polymerized or cured in-situ by heat generating substrates and has self-adhesive characteristics. Furthermore, the damping properties, adhesive qualities and structural integrity of the material are relatively unaffected by prolonged exposure to elevated temperatures and/or hot motor oil.

Abstract: The invention pertains to an aqueous cross-linkable polymer composition comprising: W a) a water-soluble first polymer comprising acid groups, which is at least partially neutralized with a volatile base; b) a dispersion of a substantially water-insoluble second polymer, which comprises carbonyl-functional groups, which may be produced by emulsion polymerization in the presence of an aqueous solution of the first polymer; c) a cross-linking agent which can react by condensation with the carbonyl-functional groups of the second polymer; and d) a water-soluble, amine-functional third polymer.

Abstract: Disclosed is a method of modifying polyethylene to increase its ability to resist the transmission of water vapor. The polyethylene is modified to increase long chain branching resulting in lower water vapor transmission rates in films prepared with the modified polyethylene. The polyethylene can be modified using peroxides, air and even by admixture with high long chain branching content polyethylene. The polyethylene, particularly when in the form of films, can be used for preparing packaging where sorption of flavor, aroma, or colorant compounds must be minimized.

Abstract: The present invention is an elastomeric composition having a primary rubber component, a secondary rubber component, and an elastomeric component. More particularly, in one embodiment the elastomeric composition has from 50 to 95 phr natural rubber as the primary rubber component, from 5 to 40 phr of a copolymer of a C4 to C7 isoolefin and a para-alkylstyrene as the elastomeric component, and from 0 to 40 phr of polybutadiene as a secondary rubber component. In one embodiment, the copolymer includes a terpolymer of isobutylene, para-methylstyrene and para-bromomethylstyrene, wherein the para-bromomethylstyrene is present from 0.2 mol % to 3.0 mol %. Further, the composition desirably contains carbon black. The compositions are useful for tire treads and tire sidewalls having improved winter wear properties such as high DIN abrasion values and improved Tangent Delta values.

Abstract: This invention relates to waterborne polymer compositions and their applications. More particularly, the invention relates to the utilization of water-dispersible polymers and fatty acid as surface-active agents in emulsion polymerization reactions to produce waterborne polymer compositions which exhibit superior grease, water, and chemical resistance properties.

Abstract: A foam profile prepared by a process comprising the steps of foaming a thermoplastic vulcanizate, where the thermoplastic vulcanizate is prepared by a process comprising the step of dynamically vulcanizing a rubber within a mixture that includes from about 15 to about 95 percent by weight of the rubber and from about 5 to about 85 percent by weight of a thermoplastic component based upon the total weight the rubber and thermoplastic component combined, where the thermoplastic component includes from about 65 to about 90 percent by weight of a conventional thermoplastic resin and from about 10 to about 35 percent by weight of a random propylene copolymer based upon the total weight of the thermoplastic component.

Abstract: A melt processable thermoplastic blend and a process for the preparation thereof is disclosed. The blend comprises an intimate mixture of polypropylene copolymer, EPDM and other additives and exhibits suitable flow properties as well as mechanical properties (such as melt flow index: 10-15 g/10 minutes; flexural modulus: 8000-15000 kg/cm2; (notched Izod impact strength: 50-60 kg.cm/cm; and heat deflection temperature: 60-105° C.) necessary for injection molding of car bumpers as well as their property requirements. It is prepared by extruding the components in a twin screw extruder or a Buss co-kneader all together or in separate batches, while for example, the twin screw temperature is maintained in the range of 180 to 250° C. and the screws are rotated at a speed of 50 to 100 rpm.

Abstract: This invention relates to a tire having at least one component (e.g. tread) of a rubber composition comprised of a carbon black and precipitated silica reinforced elastomer blend comprised of a combination of hydroxyl functionalized aqueous emulsion polymerization prepared styrene/butadiene copolymer elastomer (E-SBR) and tin coupled organic solvent solution polymerization prepared styrene/butadiene copolymer elastomer (S-SBR) and/or isoprene/butadiene copolymer elastomer. Preferably, said E-SBR is exclusive of functional groups reactive with alkoxy groups other than said hydroxyl functional groups. A coupling agent as bis(3-triethoxysilylpropyl) polysulfide having an average of from only 2 to 2.6 connecting sulfur atoms in its polysulfidic bridge is used. The invention further relates to an article of manufacture, such as for example a tire, having at least one component of a rubber composition comprised of said elastomer blend.

Abstract: The invention relates to a tire having a tread of a rubber composition comprised of a composite of styrene/butadiene elastomer and functionalized styrene/butadiene elastomer containing an internal silanol and/or siloxy group therein with pendent silanol and/or alkoxy groups of a polymodal (e.g. bimodal) molecular weight distribution, together with at least 30 phr of cis 1,4-polybutadiene rubber and a dispersion in said rubber composition of precipitated silica aggregates and a coupling agent as a bis (3-triethoxysilylpropyl) polysulfide having an average of from only 2 to 2.5 sulfur atoms in its polysulfidic bridge to the exclusion of a bis (3-trialkoxysilylalkyl) polysulfide having an average of greater than 2.5, and particularly greater than 3, sulfur atoms in its polysulfidic bridge. In one aspect, said silica aggregates may be pre-treated to reduce said hydroxyl groups on their surface prior to blending with said silanol and/or siloxy functionalized elastomer.

Abstract: The present invention is directed to methods of making natural or synthetic latex articles without the use of accelerators, thiurams or carbamates. The method includes making an elastomeric material by mixing a base polymer containing carboxylate groups with a carboxylic acid or derivative thereof, a divalent or trivalent metal, an amine or amino compound, and a neutralizing agent. The elastomeric material is formed into a latex article. The present invention is also directed to a latex article made according to this method. The latex article does not contain any accelerators, thiurams or carbamates.

Abstract: A method for making a polymer blend composition includes combining at least one component A incorporating at least five percent by weight of anionic functional groups in its structure, at least one component B, preferably free of such functional groups, and at least one component C, which is a metal cation. The composition is melt-processed to produce in-situ a reaction product of the anionic functional groups of component A with the metal cation to form a pseudo-linked crosslinked structure of component A in the presence of component B. In the composition formed by the method, Components A and B can form interpenetrating or semi-interpenetrating networks. The method allows for greater flexibility in preparation of polymer compositions than methods previously known.

Abstract: Sealant and potting formulations are provided which are prepared from components including ungelled mercapto-terminated polymer(s) prepared by reacting reactants comprising polyvinyl ether monomer(s) and polythiol material(s); curing agent(s) reactive with a mercapto group of the mercapto-terminated polymer; and additive(s) selected from the group consisting of fillers, adhesion promoters, plasticizers and catalysts.

Abstract: Improved grafted propylene copolymer compositions and adhesive blends containing same are provided. The grafts are obtained by reacting propylene-ethylene impact copolymers having specified rubber contents and molecular weight distributions with ethylenically unsaturated acids or acid derivatives, such as maleic anhydride.

Abstract: This invention relates to a mixture containing one or more olefin rubbers and one or more nitrile rubbers, to a process for the production thereof, to a vulcanizable mixture and to a process for the production thereof as well as to moldings of all kinds producible from the mixtures.

Abstract: A vulcanizate comprising a rubber, and a damping component that is prepared by preparing a mixture of living polymers that include living polymers with at least two living ends and living polymers with one living end to form a mixture of living polymers, and coupling the mixture of living polymers with a coupling agent that has at least three reactive functionalities.

Abstract: A light-diffusing resin composition comprising at least one alicyclic structure-containing resin (A) selected from the group consisting of (co)polymers (A1) having repeating units derived from an alicyclic structure-containing ethylenically unsaturated monomer and (co)polymers (A2) having repeating units which are derived from an aromatic vinyl monomer and in which the aromatic rings have been converted to alicyclic structures through hydrogenation after polymerization and transparent fine polymer particles (B), and a light-diffusing molded or formed resin obtained by molding or forming the resin composition.

Abstract: Compositions comprising elastomers and high-molecular-weight polyethylenes with irregular particle shape, process for their preparation, and their use

Abstract: A binder resin containing a mixture of carboxyl group containing chlorinated polyolefins and an ethylene-vinyl acetate copolymer. The binder resin is incorporated in primer formulations for application on substrates including polyolefinic materials.

Abstract: A pressure-sensitive adhesive composition comprising a water-soluble polymer A, a water-insoluble component B, a water-incompatible solvent C that dissolves the water-insoluble component B and is incompatible with water, a water-soluble plasticizer D, and water, wherein the pressure-sensitive adhesive composition in a dry state has water solubility according to Technical Association of The Pulp and Paper Industry Useful Method 213 (TAPPI UM 213). Also disclosed are a method for producing a pressure-sensitive adhesive composition according to the present invention, comprising the steps of: preliminarily preparing a true nonaqueous solution of a water-insoluble component B in a water-incompatible solvent C, and mixing the true nonaqueous solution with an aqueous solution of at least one member selected from the group consisting of a water-soluble polymer A and a water-soluble plasticizer D, and a pressure-sensitive adhesive and a pressure-sensitive adhesive tape that use the composition.

Abstract: A block copolymer comprising a polymer block [A] and a polymer block [B]. The polymer block [A] contains mainly a repeating unit having an alicyclic structure, and the polymer block [B] contains the repeating unit having an alicyclic structure and a repeating unit derived from a diene based monomer and/or a vinyl based monomer. In any block, the carbon-carbon unsaturated bonds are hydrogenated. The block copolymer is molded into optical disks, optical waveguides, films, sheets, containers, and optical lenses.

Abstract: Weatherable fluoropolymer-acrylic compositions based on the use of C3 and higher straight chain (meth)acrylate esters are provided.

Abstract: A process for polymerizing polycycloolefins containing pendant anhydride moieties is disclosed. The process utilizes a single component nickel containing catalyst of the formula EnNi(C6F5)2 wherein n is 1 or 2 and E represents a neutral electron donor ligand.

Abstract: The present invention provides a thermoplastic resin composition comprising (a) 100 parts by weight of a resin selected from the group consisting of polypropylenes and copolymers composed mainly of propylene, (b) 5 to 350 parts by weight of a resin selected from the group consisting of polyethylenes and copolymers composed mainly of ethylene, the resin having been prepared using a single site catalyst, and (c) 5 to 200 parts by weight of an ionomer resin or its ester.

Abstract: PEG-chitosan conjugates comprising chitosan and polyethylene glycol moieties or derivatives thereof which are bonded together and their use in medicine is described. In one embodiment, the conjugate comprises a chitosan moiety or a derivative thereof and a polyethylene glycol moiety or a derivative thereof which are bonded together via the amino function on the chitosan by the use of an activated chitosan species. In another embodiment, the conjugate comprises a chitosan moiety or a derivative thereof and a polyethylene glycol moiety or a derivative thereof which are bonded together, the chitosan portion of the conjugate having a molecular weight in the range of from 10 kilodaltons to 1000 kilodaltons.

Abstract: A thermoplastic elastomer exhibiting scarce tendency of depositing gummy crust around the extrusion die upon extrusion molding articles therefrom and a superior oil-resistance, which comprises (A) a crystalline polyolefin resin and (B) a cross-linked rubber component produced by a specific melt-kneading technique and which has a certain high level of gel content, a high oil-resistance and a certain reduced rate of deposition of gummy crust on the extrusion die.

Abstract: The melt of polyvinyl aromatic polymers comprising from 10 to 45 weight % of star branched polymer prepared using a combination of thermal and tetra functional peroxide initiation has an improved melt strength permitting better foam formation for extrusion foam blown with conventional blowing agents and inert gases including CO2 and an improved tensile strength for oriented polystyrene (OPS) articles, e.g. blown film or extruded sheet.

Abstract: The melt strength is increased and the gloss level is reduced in olefinic TPE compositions through the addition of sufficient amounts of free radical generators (A) and co-curative agents (B). The free radical generators (A) include peroxides, organic peroxides, the persulfates, and the diazo compounds, and mixtures thereof. The co-curative agents (B) includes metal salts of alpha, beta-unsaturated carboxylic acids and alpha, beta-unsaturated carboxylic acids where the pending acid group has been neutralized, or mixtures thereof, and the metals for forming the metal salts of co-curative agent (B) include zinc, lithium, calcium, magnesium, sodium or aluminum, or mixtures thereof.

Abstract: Adhesive composition, including a mixture of about 1 percent to about 35 percent by weight of chlorinated polymer, about 1 percent to about 35 percent by weight of a nitrile elastomer, a rubber-modified acrylonitrile copolymer, or mixtures thereof, and about 25 percent to about 90 percent by weight of an alkyl acrylate or methacrylate monomer.

Abstract: The present invention provides polypropylene made by dispersing at least one, cracking-resistant polymer therein for controlled rheology treatment to yield a polypropylene polymer with a high melt flow rate and good molding characteristics.

Abstract: A process for producing a hydrogenation product of a ring-containing unsaturated hydrocarbon polymer, which product is low in the content of the heterogeneous catalyst used.

Abstract: The present invention provides an adhesion promoting agent which includes a graft copolymer formed by a halogenated polyolefin polymer with at least one reactive functionality and a substantially saturated hydrocarbon polymer having more than one reactive functionality. At least one reactive functionality of the saturated hydrocarbon polymer is reactive with the reactive functionality of the halogenated polyolefin to form the graft copolymer of the invention.

Abstract: An adhesive composition is provided that contains both a hydrophobic phase and a hydrophilic phase, wherein the hydrophobic phase is composed of a crosslinked hydrophobic polymer composition and the hydrophilic phase is a water-absorbent blend of a hydrophilic polymer and a complementary oligomer capable of crosslinking the hydrophilic polymer through hydrogen bonding, ionic bonding, and/or covalent bonding. The composition is useful as a bioadhesive, for affixing drug delivery systems, wound dressings, bandages, cushions, or the like to a body surface such as skin or mucosal tissue.

Abstract: The present invention provides a thermoplastic vulcanizate prepared by a process comprising the steps of dynamically vulcanizing rubber within a blend that includes the rubber and a thermoplastic resin, where the rubber comprises an elastomeric copolymer of ethylene, at least one &agr;-olefin, and optionally one or more diene monomers, where the elastomeric copolymer is characterized by having a crystallinity, as measured by differential scanning calorimetry, of less than 10 J/g, an ethylene content that is less than 90 mole percent based upon the entire copolymer, a weight average molecular weight that is greater than about 20,000 as measured by GPC with polystyrene standards, a molecular weight distribution that is less than 7, and an ethylene compositional distribution that is less than about 4 percent for the closest 90 percent of fractioned samples.

Abstract: The invention provides rubber mixtures of at least one double bond-containing rubber, rubber gels and additives of inorganic peroxides and also optionally further fillers and rubber auxiliary substances. Rubber mixtures according to the present invention are characterized in the uncrosslinked state by good processability (compound viscosity ML 1+4/100° C.<60 ME) and in the vulcanized state by improved mechanical properties in particular with regard to the product of the modulus at 100% extension and the elongation at break (S100×D) and also by improved tensile strengths. In addition, vulcanizates prepared from rubber mixtures according to the present invention have a relatively low density, which has an advantageous effect on the weight of the rubber molded items prepared from the rubber mixtures. The vulcanizates are suitable for producing industrial rubber articles and for tire components.

Abstract: Adhesive composition, including a mixture of about 1 percent to about 35 percent by weight of chlorinated polymer, about 1 percent to about 35 percent by weight of a nitrile elastomer, a rubber-modified acrylonitrile copolymer, or mixtures thereof, and about 25 percent to about 90 percent by weight of an alkyl acrylate or methacrylate monomer.