Abstract: The present invention relates to an additive to improve processability in the manufacture of ethylene, propylene and diene compounds, comprising Ethylene Propylene Diene type M (EPDM) and paraffinic mineral oil, and a method for producing additive to improve processability in the manufacture of ethylene, propylene and diene compounds, comprising the steps of: a) heating one fifth of paraffinic mineral oil until reaching a temperature of 100° C.±5° C.; b) once the paraffinic mineral oil portion reaches the indicated temperature, add Ethylene Propylene Diene type M (EPDM), maintaining constant temperature and stirring until complete dissolution to generate Mixture 1; c) Add the remaining four fifths of the paraffinic mineral oil to Mix 1 and continue stirring until dissolution is complete while maintaining the temperature; and d) once complete integration of Blend 1 and the remaining four fifths of the paraffinic mineral oil is achieved, filtering the additive to remove any remnants and/or impurities.

Abstract: A novel vulcanizable composition is provided, based on at least one hydrogenated nitrile rubber, on at least one peroxide, on at least one unsaturated carboxylic acid and/or salts thereof, and also on specific microgels. These vulcanizable compositions can be used to obtain vulcanized products which can in particular be used for drive belts, roll coverings, hoses and cables.

Abstract: A composition comprising a first fluoropolymer and a second fluoropolymer. The first and second fluoropolymers are melt-processable, thermoplastic and have a melting point between 100° C. and 320° C. The first fluoropolymer has a relaxation exponent of from 0.93 to 1.0. The second fluoropolymer has a relaxation exponent of from 0.3 to 0.92. A composition comprising a first fluoropolymer having a long chain branching index of from 0 to 0.1 and a second fluoropolymer having a long chain branching index of at least 0.2. A composition comprising a core-shell polymer having a first polymer portion, wherein a polymer having an identical chemical structure as the first polymer portion has a relaxation exponent of from 0.93 to 1.0, and a second fluoropolymer portion, wherein a polymer having an identical chemical structure as the second fluoropolymer portion has a relaxation exponent of from 0.3 to 0.92. Methods for making compositions and methods of making articles from compositions.

Abstract: It is an object of the invention to provide a chloroprene rubber-based polymer latex that has a good balance between initial adhesion and storage stability and is suitable for one-component aqueous adhesive applications. The invention relates to a chloroprene rubber-based polymer latex composition containing a mixture of a chloroprene rubber-based polymer latex and a latex of an acrylic or styrene-acrylic resin-based polymer obtained by copolymerization of a specific carboxyl group-containing unsaturated monomer, in which the specific carboxyl group is neutralized with an alkali.

Abstract: The invention relates to a wiper rubber for windshield wipers, which contains at least one rubber component that is cured by vulcanization, the material of the wiper rubber containing, at least in the unvulcanized state, a combination of a cross-linking agent with sulfur and/or with a sulfur donor.

Abstract: An air spring bellow comprising a vulcanized rubber component including the at least partially vulcanized residue of hydrogenated nitrile rubber and a rubber other than hydrogenated nitrile rubber.

Abstract: Polymer blend compositions are disclosed comprising a polychloroprene homopolymer and a polymethacrylic acid having a weight average molecular weight of not greater than 50,000 daltons. A process for preparation of the polymer blend composition is also disclosed. The polymer blend compositions are useful for preparing solvent-based adhesive compositions having excellent high temperature adhesion properties.

Abstract: An immiscible polymer blend including a first polymer component including a paint polymer phase and a second polymer component immiscible with the first polymer component and selected from polyolefins and polymethylmethacrylate (PMMA). A method of recycling paint by blending a first polymer component including a paint polymer phase with a second polymer component immiscible with the first polymer component and selected from polyolefins and polymethylmethacrylate (PMMA) is also presented.

Abstract: A powder adhesive comprising a primary rubber bonding polymer and a thermosetting component, and a method for bonding elastomers to metals employing the same. By adding a thermosetting component to a powdered adhesive, the adhesive may be applied to a substrate, sintered and thermoset to provide a sweep resistant adhesive film on the substrate, which may subsequently be bonded to an elastomer. Without a thermosetting component, the adhesive is at risk to re-melt or otherwise soften during a heated elastomer molding operation which in turn could cause the adhesive material to sweep off the substrate.

Abstract: A rubber material of a wiper blade for windshield wipers is described, which comprises a first rubber component of a first polarity and a second rubber component of a second greater polarity. To equalize the first and second polarities, the first rubber component is at least partially replaced by a chemically functionalized derivative.

Abstract: A latex of a chloroprene polymer formed from one or more monomers comprising 2-chloro-1,3-butadiene as the main monomer ingredient, characterized in that the solid matter in the polymer latex has a gel content less than 3 mass %, the solid matter in the polymer latex includes a tetrahydrofuran-soluble component having a weight-average molecular weight of from 550,000 to 1,100,000 and a molecular-weight distribution (Mw/Mn) of from 2.0 to 3.1, and the dried solid matter in the polymer latex has a crystallization rate (R) represented by hardness increase at ?10° C. (R is the time required for initial hardness (time=0) to increase by 30 points at ?10° C. as measured according to JIS-K6301) less than 60 minutes. The chloroprene polymer latex has an excellent balance among initial bond strength, contact adhesion, and water resistance. This latex is useful as an adhesive and can be used in applications where heat resistance of 60° C. or higher, initial bond strength, and contact adhesion are required.

Abstract: Swellable compositions and methods of using and controlling them are disclosed. In certain examples, the swellable composition may comprise an active phase responsive to swell upon exposure to a swelling fluid. In some examples, the active phase of the swellable composition is effective to deswell in response to an applied stimulus in the presence of the swelling fluid. In other examples, the swellable composition may further comprise a passive phase responsive to swell to a lesser degree than the active phase upon exposure to the swelling fluid. Devices and systems using the swellable compositions are also described.

Abstract: A polymer latex composition has an acrylonitrile component, a polychloroprene component, and a natural latex component. When these components are blended together and formed into a film, the film exhibits a resistance to ozone that is greater than a resistance to ozone of materials in which acrylonitrile is not included. Furthermore, the combination of acrylonitrile and chloroprene imparts a synergistic effect to the composition with regard to ozone resistance. The film can be formed into a glove having a resistance to ozone that is improved over the resistance to ozone of gloves not including acrylonitrile. The glove may include an antimicrobial agent.

Abstract: An object of the present invention is to provide a novel polychloroprene-based copolymer, a soapless polychloroprene-based latex, and a process for producing the same in a simple and convenient manner, which are intended to be used for the improvement in adhesiveness and water resistance of a conventional polychloroprene adhesive or the improvement in oil resistance and adhesiveness of a styrene-butadiene block copolymer. The invention relates to a chloroprene-based block copolymer comprising a polymer (A) having a composition represented by the following formula (1) and a chloroprene-based polymer (B), the polymer (A) being linked to one terminal or both terminals of the chloroprene-based polymer (B), and the total amount of the 1,2-bond and the isomerized 1,2-bond in the chloroprene-based polymer (B) as determined by carbon-13 nuclear magnetic resonance spectrometry being 2.

Abstract: The present invention is directed to a peroxide curable rubber compound containing a butyl rubber polymer and an olefin polymer of ethylene and at least one ?-olefin. The present invention is also directed to a peroxide curable rubber compound containing a butyl polymer and an EP(D)M rubber polymer.

Abstract: Physical blends of solid particulates of chlorinated polyolefins and elastomeric ethylene copolymers yield a blended product with anti-blocking characteristics superior to that defined by the weight proportion-based linear interpolation of either blend component. The blend compositions are useful as impact modifiers for polyvinyl chloride compositions.

Abstract: Compositions comprising of blends of polymeric materials, including a cationic polymer having an intrinsic viscosity of from 8 to 17 dl/g and a cationic content of from 20 to 100% which may be used in the dewatering of thermophilic sludges.

Abstract: Thermoplastic vulcanizates having improved barrier properties, comprising a high melt flow index thermoplastic olefin resin, butyl rubber and an oligomer of isobutylene and butene.

Abstract: A synthetic chloroprene rubber adhesive composition which contains carboxylated synthetic chloroprene rubber for the main ingredient thereof and further contains chlorinated polypropylene and/or a chlorinated polypropylene derivatives. The adhesive composition can strongly bond various components to polypropylene used for a speaker frame, etc. unlike conventional synthetic chloroprene rubber adhesives which have insufficient adhesion strength in this application.

Abstract: A butyl polymer composition having improved cold flow properties is described. The composition comprises a butyl polymer (preferably a halogenated butyl polymer) and a styrene monomer. The styrene monomer is a copolymer of ?-methylstyrene and another styrenic monomerer (e.g., styrene and vinyl toluene). Relative to the base butyl polymer, the cold flow properties of the butyl polymer composition are improved along with a number of other properties.

Abstract: A fluoropolymer having repeating units formed by cyclopolymerization of a functional group-containing fluorinated diene represented by the following formula: CF2?CR1-Q-CR2?CH2??(1) wherein each of R1 and R2 which are independent of each other, is a hydrogen atom, a fluorine atom, an alkyl group having at most 3 carbon atoms, or a fluoroalkyl group having at most 3 carbon atoms, and Q is a bivalent organic group having a functional group bonded thereto, and a production method which comprises subjecting the above diene to radical polymerization. The polymer has a high Tg and a functional group concentration sufficient to exhibit the characteristics thereof.

Abstract: An elastomer sealing material having low dielectric constant and low dielectric dissipation, which is satisfactory with both of resistance to oxygen plasma and non-adhesion to quartz and can be applied to apparatus utilizing microwaves, is disclosed. The plasma-resistant fluorine-based elastomer sealing material comprises a fluorine-based elastomer having a divalent perfluoropolyether or divalent perfluoroalkylene structure in the main chain thereof and having two or more hydrosilyl groups and addition-reactive alkenyl groups in the terminals or side chains thereof, and a polymer having two or more hydrosilyl groups in the molecule and being capable of addition reacting with the alkenyl groups, the fluorine-based elastomer being crosslinked with the polymer.

Abstract: An oil resistant, elastomeric rubber composite, particularly suited for use as an elastic tape for garments requiring a high degree of oil resistance due to conditions of its use. The rubber composite is made from a unique blend of nitrile rubber, polychloroprene (neoprene), epoxidised natural rubber and natural rubber. The elastomeric composite has excellent compatibility between two rubbers of different polarity when properly compounded and processed. The composite formed as an elastic tape has a low modulus of elasticity, good needle tear strength when sewn inside a garment, and it provides a comfortable fit for long use in addition to having reduced oil swell and oil abosorption characteristics. Elastic tapes made from the elastomeric rubber composite are particularly suitable for swimwear, shower caps, head bands, face masks and other garments with direct skin contact.

Abstract: The present invention provides an aqueous adhesive composition including a resinous phase dispersed in an aqueous medium, the resinous phase containing (a) a polychloroprene, (b) optionally, a halogenated polyolefin different from (a), and (c) optionally, an aminoplast resin. Further provided is an aqueous adhesive composition of a resinous phase dispersed in an aqueous medium wherein the resinous phase includes (a) a polychloroprene, (b) a halogenated polyolefin different from (a), and (c) a polyurethane polymer having ionic salt groups. A multi-layer composite and methods for adhering a thermoplastic material to a rigid substrate using the aqueous adhesive compositions also are provided.

Abstract: The invention relates to rubber mixtures which contain microgels and isocyanatosilanes and vulcanisates produced therefrom. By adding isocyanatosilanes the mechanical properties of the vulcanisates, in particular the elongation properties and the abrasion resistance, are improved without the difference in rebound resilience at 70° C. and 23° C. being reduced.

Abstract: A two part aqueous adhesive comprising a main agent containing a polychloroprene latex as a main component and a curing agent, the main agent and the curing agent being separated during storing or transporting.

Abstract: Polymer composition comprising (A) (co)polymers based on chlorotrifluoroethylene (PCTFE) and (B) copolymers based on ethylene/chlorotrifluoroethylene (ECTFE) and/or ethylene/tetrafluoroethylene (ETFE).

Abstract: The residual chlorine content of a polyolefin-substituted carboxylic acylating agent formed by a chlorine-assisted reaction of a polyolefin and an &agr;,&bgr;-unsaturated carboxylic reactant can be reduced by heating the polyolefin-substituted carboxylic acylating agent having a residual chlorine content in the presence of an &agr;,&bgr;-unsaturated carboxylic reactant, optionally in the further presence of a sulfonic acid. Residual chlorine content can be further reduced by using, in the reaction of the polyolefin &agr;,&bgr;-unsaturated carboxylic reactant, a high speed mixer provided with a dual pitch blade.

Abstract: An elastomer composition obtained by crosslinking 1-99 parts by weight of a crosslinkable rubber-like polymer (A) and 1-99 parts by weight of a polypropylene resin (B) [the total amount of (A) and (B) being 100 parts by weight], where (B) is a crosslinking type polypropylene resin, has a flexural modulus of 100-10000 kgf/cm2 as specified in JIS K6758 and has a melting point peak in the range of 100-150° C. in differential scanning calorimetry (DSC), the melting point peak calorie being in the range of 10-600 J/g, especially the above elastomer composition wherein (A) has a crosslinking degree of 1-95% and a swelling degree of 3-100.

Abstract: A dispersant is prepared from an amine and a hydrocarbyl-substituted acylating agent, wherein the hydrocarbyl substituent is a polymerized olefin having a polydispersity {overscore (M)}w/{overscore (M)}n of greater than 5. Such polyolefin substituents are prepared by polymerization of olefins in the presence of a calcined catalyst comprising a partially or fully neutralized ammonium salt of a heteropolyacid.

Abstract: To provide a thermoplastic polyester resin composition which has a very good durability to alkaline solutions for a long period of time. That is, a thermoplastic polyester resin composition, wherein a thermoplastic polyester resin (A) is compounded with 1-25% by weight (in the total composition) of impact resistance rendering materials (B), 0.1-15% by weight (in the total composition) of a silicone compound and/or a fluorine compound (C), 1-50% by weight (in the total composition) of an inorganic filler (D), and 0.1-10% by weight of at least one polyfunctional compound (E) selected from the group consisting of an epoxy compound, an isocyanate compound and a carboxylic acid dianhydride. A molded article of the present invention has anti-stress properties even in a weld part thereof.

Abstract: A dispersant is prepared from an amine and a hydrocarbyl-substituted acylating agent, wherein the hydrocarbyl substituent is a polymerized olefin having a polydispersity {overscore (M)}w/{overscore (M)}n of greater than 5. Such polyolefin substituents are prepared by polymerization of olefins in the presence of a calcined catalyst comprising a partially or fully neutralized ammonium salt of a heteropolyacid.

Abstract: One embodiment of the present invention provides a process, which includes: graft polymerizing a vinyl chloride monomer in suspension in the presence of a core-shell impact modifier; wherein the core-shell impact modifier includes: a core including polyvinyl chloride or vinyl chloride copolymers; and a shell including crosslinked alkyl (meth)acrylate homo- or copolymers. Another embodiment of the present invention provides a thermoplastic polyvinyl chloride molding composition modified with an elastomer-containing core-shell modifier, prepared by a process, which includes graft polymerizing a vinyl chloride monomer in suspension in the presence of a core-shell impact modifier; wherein the core-shell impact modifier includes a core including polyvinyl chloride or vinyl chloride copolymers; and a shell including crosslinked alkyl (meth)acrylate homo- or copolymers. Another embodiment of the present invention provides a plastic profile, which includes the above-noted composition.

Abstract: The invention relates to novolac resins obtained by condensation (A) of an aromatic compound containing at least two hydroxyl groups and (B) of an unconjugated diene in an (A)/(B) molar ratio of between 0.7 and 1.75 in the presence of an acidic catalyst, which are characterized in that the content of free aromatic compound is lower than 5% by weight. Also disclosed are a process for the preparation of the resins, and rubber-based compositions including from 0.5 to 20 parts by weight of the above mentioned novolac resins per 100 parts by weight of rubber. The invention also relates to the use of the resins or rubber-based compositions in the field of vulcanization, especially of tires and of conveyor belts.

Abstract: The present invention relates to a sulfur cured rubber composition particularly suited for use in tire treads. The sulfur cured rubber composition is composed of, based on 100 parts by weight of rubber, from about 1.0 to 15 parts by weight of a chlorosulfonated polyethylene; from about 1.0 to 15 parts by weight of a carboxylated nitrile rubber; and 98 to 70 parts by weight of a rubber selected from the group consisting of medium vinyl polybutadiene, styrene-butadiene rubber, synthetic cis-1,4-polyisoprene, synthetic 3,4-polyisoprene, natural rubber, cis-1,4-polybutadiene, styrene-isoprene rubber, styrene-isoprene-butadiene rubber, acrylonitrile-butadiene rubber and mixtures thereof.

Abstract: A wiper blade has a wiper head for mounting a wiper bracket, a wiper lip, and a tilting web connecting the wiper head with the wiper lip, the wiper head and the tilting web being composed of a material selected from the group consisting of polychloroprene and a polymer mixture including portion of at least 60 weight percent polychloroprene and at least one another elastomere, the wiper lip at least in a part which comes in contact with a glass pane being composed of a material selected from the group consisting of natural rubber and a synthetic elastomere based on a diene with hydrocarbon structure.

Abstract: There is disclosed a resin composition comprising about 99-1% by weight of a vinyl chloride resin and about 1-99% by weight of a copolymer of about 30-70 mol % N-substituted maleimide structural unit and about 70-30 mol % olefinic structural unit. The composition has excellent forming and molding properties and provides formed or molded products of improved heat resistance and mechanical properties.

Abstract: The present invention provides self-fusing, or self-amalgamating, compositions comprising rubber blends, preferably formed into a tapes, which, after being elongated and, for example, wrapped around a substrate, fuse together to form a continuous layer. In preferred aspects of the invention, the composition comprises a partially pre-crosslinked polyisoprene, a halogenated polyisobutylene, a medium molecular weight polyisobutylene, a non-extractable plasticizer and a mineral filler.

Abstract: An electrostatic toner receptor layer comprised of a blend of a terpolymer of methyl methacrylate/ethyl acrylate and N-t-butyl acrylamide, a vinyl resin, a chlorinated rubber or polyurethane dispersion rubber and a plasticizer. The resulting receptor layer provide durability and flexibility when applied to a crack resistance film for subsequent application to soft-sided vehicles.

Abstract: A chloroprene rubber composition comprising the following polymers A and B in such a proportion that A is from 20 to 70 wt % and B is from 30 to 80 wt %:A: a chloroprene polymer obtained by polymerization of chloroprene containing from 0 to 50 wt % of a comonomer copolymerizable with chloroprene, said polymer having a number average molecular weight of from 500 to 20,000; and B: a chloroprene polymer obtained by polymerization of chloroprene containing from 0 to 50 wt % of a comonomer copolymerizable with chloroprene, whereby with a 0.1 wt % tetrahydrofuran solution of said polymer, the weight of the polymer permeated through a filter having a pore diameter of 0.50 .mu.m is less than 0.90 time of the weight of the polymer permeated through a filter having a pore diameter of 1.0 .mu.m.

Abstract: A chloroprene polymer composition containing an .alpha.,.beta.-unsaturated carboxylate polymer having a number average molecular weight of at least 300,000.

Abstract: Intervulcanized compositions having improved curing efficiency are prepared by the free radical curing of a mixture of an ethylenically unsaturated diolefin polymer such as natural or synthetic rubber and a saturated or low unsaturation polymer such as an ethylene propylene elastomers copolymer which contains functional groups pendant to the polymer chain. These functional groups contain an olefinic or vinyl double bond positioned alpha, beta to a substituent group which activates the double bond towards free radical addition reactions with the diolefin polymer. Preferred functionality includes benzylic ester functionality represented by the structure: ##STR1## wherein R.sub.2 and R.sub.3 are independently selected from hydrogen or C.sub.1 to C.sub.6 alkyl, and R.sub.4 is selected from hydrogen, C.sub.1 to C.sub.28 alkyl, aryl or C.sub.2 to C.sub.28 alkenyl.

Abstract: An aqueous, self-curing clay composition is cured to a ceramic-like state without firing. The clay composition includes a first elastomer capable of curing the composition to a ceramic-like state without firing and a second elastomer that cures upon the removal of water.

Abstract: A chloroprene polymer composition containing an .alpha.,.beta.-unsaturated carboxylate polymer having a number average molecular weight of at least 300,000.

Abstract: A chloroprene rubber composition having a high damping performance, comprising a solid chloroprene polymer and a low molecular weight chloroprene polymer having a number average molecular weight of from 500 to 50,000, obtained by polymerization in the presence of an alkylmercaptan and/or a mercaptoalcohol.

Abstract: Intervulcanized compositions having improved curing efficiency are prepared by the free radical curing of a mixture of an ethylenically unsaturated diolefin polymer such as natural or synthetic rubber and a saturated or low unsaturation polymer such as an isobutylene/para-methylstyrene copolymer which contains functional groups pendant to the polymer chain. These functional groups contain an olefinic or vinyl double bond positioned alpha, beta to a substituent group which activates the double bond towards free radical addition reactions with the diolefin polymer. Preferred functionality includes benzylic ester functionality represented by the structure: ##STR1## wherein R.sub.2 and R.sub.3 are independently selected from hydrogen or C.sub.1 to C.sub.6 alkyl, and R.sub.4 is selected from hydrogen, C.sub.1 to C.sub.28 alkyl, aryl or C.sub.2 to C.sub.28 alkenyl.

Abstract: Thermally-reversible polymer compositions are obtained by reacting compounds with isocyanate and labile-hydrogen functionality. Aromatic polyimide, aromatic polycarbonate, polyarylsulfide, aromatic polyester with liquid crystal property, and polyarylimidazolidine oligomers are incorporated into the isocyanate or labile hydrogen compounds to give high-performance characteristics. Such thermally-reversible isocyanate-based polymer compositions with high-performance characteristics are useful, among other things, as finish surface coatings on composite materials such as polypropylene and polyethylene terephthalate. Novel phenolic-hydroxyl terminated polyarylsulfide and polyarylimidazolidine oligomers and their preparation are also described.

Abstract: A flowable adhesive composition specifically adapted for use in securing rubber sheet material to a substrate surface includes at least one polychloroprene rubber polymer, at least one polymer or copolymer which is comprised primarily of one .or more monoolefins, and a suitable solvent for simultaneously dissolving the polychloroprene and monoolefin based rubbers to form a homogeneous composition which can be applied to the substrate surface and rubber sheet as by pouring, brushing, spraying, rolling, or similar operations.The composition comprises a blend containing at least one polychloroprene rubber and at least one monoolefin based polymeric elastomer. The rubber adhesive composition of the invention exhibits good initial bond strength and excellent resistance to creep, while simultaneously demonstrating the ability to retain good adhesive properties upon repeated exposure to moisture.

Abstract: Blends of chloroprene homopolymers or copolymers with chloroprene/acrylate or chloroprene/methacrylate graft copolymers provide compositions especially useful as components of latex adhesive formulations.

Abstract: The present invention provides for compatibilized elastomer blend compositions based on a preferred mixture of a copolymer of a C.sub.4 to C.sub.7 isoolefin, such as isobutylene, copolymerized with a para-alkyl styrene comonomer, such as para-methyl styrene wherein at least some of the alkyl substituent groups present in the styrene monomer units contain halogen, and at least one dissimilar elastomer, said blend composition further containing, as a compatibilizer, minor amounts of a copolymer of ethylene and vinyl acetate or a copolymer of ethylene, a lower alkyl acrylate or methacrylate and, optionally, a third comonomer based on acrylic or methacrylic acid.