Abstract: The present invention provides a method for coloring a rubber substrate with a latex-based colorant comprising the steps of providing a latex-based colorant that includes an elastomeric latex-based binder and a pigment system and mixing the latex-based colorant with the rubber substrate. Optionally, the latex-based colorant further comprises a surfactant system, a thickener, a defoamer, and an antioxidant. The present invention further provides a colored rubber and a latex-based colorant for coloring rubber.

Abstract: A latex compound for dip molding, which can be used for production of a high-quality dip-molded product that is excellent in oil resistance and mechanical strength, has uniform film thickness and soft feeling to the skin and is free of pinholes, as is required for gloves etc. especially in the medical fields, and assumes no stickiness on the surface of the molded product after molding. This object is attained by a latex compound for dip molding which comprises a copolymer latex (L) obtained by emulsion polymerization of a monomer mixture and 0.05 to 5.0 parts by weight of a bubble breaker (A) consisting of a C8-22 fatty acid or a salt thereof, and if necessary, 0.1 to 5.0 parts by weight of a di C5-12 alkyl sulfosuccinate salt (B) and/or 0.5 to 10.0 parts by weight of a C13-20 alkyl benzene sulfonate (C) per 100 parts by weight of the monomer mixture.

Abstract: There is disclosed a resin composition for electrodeposition paint comprising (A) a resin containing hydroxyl group, and (B) a polyisocyanate compound blocked with an amidoalcohol having at least one amide bond and at least one alcoholic hydroxyl group in the molecule, excellent in storage stability and capable of forming a coating film excellent in low temperature curability.

Abstract: The invention disclosed herein relates to an improved process for making elastomeric polyisoprene articles. In particular, the process of the invention is a system which produces synthetic polyisoprene articles exhibiting tensile strength properties similar to that of solvent-based processes using natural rubber latex. The process comprises an accelerator composition at the pre-cure stage comprising a dithiocarbamate, a thiazole and a guanidine compound. In a preferred embodiment, the accelerator composition comprises zinc diethyldithiocarbamate (ZDEC), zinc 2-mercaptobenzothiazole (ZMBT) and diphenyl guanidine (DPG), in conjunction with a stabilizer, such as sodium caseinate. The invention also includes an elastomeric polyisoprene product made by the process, such as a surgeon's glove.

Abstract: The disclosure relates to a process for improving the processability, storage stability and/or cure rate of an uncured silica reinforced rubber composition where silica comprises the major filler in the reinforced rubber composition, which comprises combining a mixture comprising, rubber, silica and at least one organic compound having a low molecular weight and a functional group wherein said functional group is at least an epoxy group, such as an epoxy/ether, epoxy/hydroxyl, epoxy/ester, epoxy/amine, ether/amine, episulfide, episulfide/ether, episulfide/hydroxyl, episulfide/ester functional group located in a terminal or sterically unhindered position in the molecule of said organic compound where the molecular weight of said organic compound having a low molecular weight is less than 7,000, or the organic compound comprises an abietyl, styrenated resorcinol formaldehyde, or ester hydroxyl organic compound having a hydroxyl, ester, and optionally, an ether group, such as an ester diol.

Abstract: Rubber compositions filled with an unusually high content of solid magnetizable particles such as iron oxide or strontium ferrite but having great resistance to crack initiation and crack growth. This allows generation of strongly magnetized areas in rubber articles built with a rubber composition according this invention. This gives—also in those applications where a large distance between a row of magnetized areas and a sensor is necessary due to deformation—well-reproducible and well-recognizable signals despite existence of disturbing magnetic fields. The magnetizable particles are bonded to a rubber matrix by a bonding agent, namely an organo-functional silane.

Abstract: The present invention relates to rubber compositions containing an elastomer and a trivalent phosphorous compound-silica complex.

Abstract: The object of the present invention is to provide a method for producing a diene-based rubber/inorganic compound complex capable of allowing a silicic acid compound including silica and the like to be dispersed uniformly and allowing a reinforcing effect to be exerted sufficiently, and a rubber composition containing said complex.

Abstract: A method of reducing allergenicity of latex rubber products such as latex rubber gloves. The latex rubber product is treated with first bath of an alkane hydrocarbon followed by a protein substituting material in the form of a synthetic plasticizer. A final wash is carried out using an alkaline or oxidative wash to remove surface and interstice dwelling protein.

Abstract: The subject invention is based upon the unexpected discovery that tires having outstanding dry and wet traction characteristics, including wet skid resistance, can be made by incorporating certain blends of styrene-butadiene rubber (SBR) and isoprene-butadiene rubber (IBR) into the treads thereof without greatly sacrificing rolling resistance and tread wear characteristics.

Abstract: Various modified particles are described which can be used in polymerizations to attach one or more polymers onto modified particles. Also described are the resulting modified particles having attached monomer or polymer groups as well as methods of preparing such modified particles. The polymer groups on the modified particles can be terminated and these various modified particles with attached groups can be used in a variety of end uses.

Abstract: The present invention provides a rubber composition for tire tread having compatibility between low fuel consumption and abrasion resistance, especially abrasion resistance under severe condition. The rubber composition for tire tread is obtained by adding carbon black containing silica as 10 to 55 parts by weight based on a rubber component of 100 parts by weight and silica coupling agent of 2 to 8% by weight based on the carbon black containing silica.

Abstract: The rubber product has similar stretchability to the human skin, so that it is useful for application to items to be put into direct contact with the skin. The rubber product is provided with 200% modulus M200 of equal to or less than 15 kgf/cm2 (14.7×105 Pa), and modulus ratios of 200% modulus M200) to 100%. modulus (M100) M200/M100, 300% modulus (M300) to 200% modulus (M200) M300/M200, and 400% modulus (M400) to 300% modulus (M300) M400/M300 all of which are equal to or less than 2.0.

Abstract: The invention provides solid supported anionic catalysts, suitable for gas phase anionic polymerization of conjugated diene monomers, that are useful for anionically producing very high molecular weight branched diene polymers, such as styrene butadiene rubber, polybutadiene rubber, polyisoprene rubber, and the like. The catalysts comprise a metalatable particle, such as a bound rubber, a thermoplastic polymer or a cured elastomer, that is multiply metalated with Group IA alkali metal atoms. The multi-branched diene polymers obtained by gas phase anionic polymerization employing the catalysts exhibit desirable properties, such as an extremely high molecular weight, a controlled molecular weight distribution, Tg and vinyl content, and the ability to readily absorb hydrocarbon solvents and oils. The polymers are easily compounded to form vulcanizable elastomeric compounds and articles, such as tires, that have excellent resistance to wear and tear and exhibit reduced hysteresis properties.

Abstract: A polybutadiene composition comprising a polybutadiene type polymer and a compound represented by the following formula (I): 1

Abstract: A rubber composition having improved properties containing a starting rubber (e.g., diene rubber) and a polysiloxane having the following alkoxysilyl group (I) and/or acyloxysilyl group (II) and having an average degree of polymerization of 3 to 10,000: ≡Si—OR1  (I) ≡Si—OCOR2  (II) wherein, R1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 18 carbon atoms or an organic group containing an ether bond and R2 is hydrogen or a hydrocarbon group having 1 to 21 carbon atoms. The polysiloxane is impregnated in an inert powder.

Abstract: The invention relates to a process for the preparation of finely divided rubbers (rubber powders) by precipitation from aqueous mixtures, which comprise filler in the form of suspensions, water-soluble salts of a metal of groups IIa, IIb, IIIa and VIII of the periodic table of the elements arid a rubber latex (polymer latex), aqueous emulsions of a rubber or rubber solution, in which one or more organosilicon compound(s) containing at least one alkoxy group is or are dissolved or emulsified, optionally in the presence of a surface-active substance, in water, or the compounds mentioned are mixed directly, optionally with a surface-active substance, with an aqueous suspension of an oxidic or silicatic finely divided filler or a mixture of these fillers at a temperature of 10 to 60° C., preferably at room temperature, while stirring, the amount of this mixture envisaged for incoporation in the rubber, based on the filler content, in general being divided into two batches.

Abstract: Medical devices of synthetic rubber are prepared from cis-1,4-polyisoprene by dip molding without the use of sulfur containing components. The devices have surprisingly favorable tensile characteristics despite what is known in regard to synthetic cis-1,4-polyisoprene. In addition, the absence of both the proteins present in natural rubber and the sulfur components that are typically used in vulcanization of both natural rubber and cis-1,4-polyisoprene of the prior art renders the devices freely usable without causing the user to suffer Type I or Type IV allergic reactions that typically arise from contact with natural rubber.

Abstract: The present invention relates to new compounds of the formula (I) in which X represents halogen, Y represents halogen or alkyl and Z represents halogen or alkyl, with the proviso that always one of the radicals Y and Z represents halogen while the other represents alkyl, and Het represents one of the groups in which A, B, D and G have the meanings given in the description, to a plurality of processes for their preparation and to their use as pesticides and herbicides.

Abstract: The present invention relates to a vulcanizable rubber composition which can be used for the manufacture of tires, a process for the preparation of this composition and a tire, the tread of which comprises such a composition, the latter having improved hysteresis and physical properties in the vulcanized state, while retaining satisfactory processing properties.

Abstract: There is disclosed a resin composition for electrodeposition paint comprising (A) a resin containing hydroxyl groups, and (B) a polyisocyanate compound blocked with an amidoalcohol having at least one amide bond and at least one alcoholic hydroxyl group in the molecule, excellent in storage stability and capable of forming a coating film excellent in low temperature curability.

Abstract: The subject invention is directed to polymer compositions which comprise a homogeneous ethylene/&agr;-olefin interpolymer, a wax and a nucleating agent, wherein the nucleating agent is provided in an effective amount such that the percent elongation at break of the polymer composition is at least about fifty percent greater than the percent elongation at break of a comparative composition which lacks the nucleating agent. The polymer compositions of the invention will find utility in applications r equiring high elongation at break, while maintaining a high onset of crystallization temperature, such as in the high-speed coating of fabrics, carpet backing, floor tile and sheeting, and adhesives.

Abstract: An electrical substrate material is presented comprising a resin matrix which includes a thermosetting polybutadiene or polyisoprene resin, an ethylene propylene rubber, and optionally a thermoplastic unsaturated butadiene- or isoprene-containing polymer; a particulate filler, a flame retardant additive, a curing agent, and a woven or unwoven fabric. The presence of the ethylene propylene rubber enhances the heat age properties of the substrate material, particularly the dielectric strength and the mechanical properties, while other electrical, chemical, and mechanical properties of the material are not adversely effected.

Abstract: The subject invention pertains to compositions comprising a rubber-like polymer and low boiling point alkanes which can be used to provide a flexible, durable, permanent repair for snags, holes, runs or ladders in hosiery such as pantyhose and nylon stockings. In a preferred embodiment, the rubber-like polymer is a gum-like residue obtained from drying commercial rubber cement adhesive. A composition comprising 2% weight to volume of this residue in an equal volume solvent system of pentane and hexane is applied to the snag and allowed to dry. When the repair is made while the stocking is being worn, a thin, transparent shield can be inserted between the stocking and the skin of the person wearing the stocking. The shield protects the skin from the composition yet does not adhere to the skin or stocking. The shield therefore can be easily removed after the composition is dry or can be left in place between the skin and the hosiery.

Abstract: A nonslip member in which a large number of nonslip convexes are fixed to an upper surface of a base fabric performing an anchoring action, and the nonslip convexes are made of rubber. By engaging a male mold and a female mold with each other, a large number of small pieces coincident to a shape of through holes of the female mold are punched out from a plate-like material. By pressurizing and heating each small piece between a punching convex and a mounting base while engaging the male mold and the female mold with each other, the small piece is bridged and fixed to the base fabric to serve as a nonslip convex.

Abstract: The instant invention relates to poly(maleimide-co-alkenyl benzene) centipede polymer and a method for producing the polymer by reacting a poly(alkenyl benzene-co-maleic anhydride) in the presence of a primary amine in a substantially dry state. The invention is further directed to a process for blending the poly(maleimide-co-alkenyl benzene) centipede polymer with elastomeric polymers, in combination with, or in substitution of, conventional extender oils, to produce extended polymers having improved properties such as tensile strength, maximum elongation, tear strength, damping properties, and the like.

Abstract: The present invention relates to rubber compositions containing borate compounds of the formula wherein R1 and R2 are independently selected from the group consisting of alkoxy radicals having from 1 to 8 carbon atoms; R3 is selected from the group consisting of alkylene groups having from 1 to 15 carbon atoms and arylene and alkyl substituted arylene groups having from 6 to 10 carbon atoms; X is selected from the group consisting of and Y is selected from the group consisting of Sx and Sex where x is an integer of from 1 to 8.

Abstract: A curable sealant, adhesive and coating composition which provides vibration dampening to a substrate to which it is applied. The composition contains from 5% to 40% by weight of 3, 4-polyisoprene, a curing agent, at least one of a liquid rubber or elastomer and at least one additional additive. The composition is applied to the substrate and heat cured.

Abstract: A rubber composition which is superior in ozone resistance and is hard to be discolored brown and white which comprises 0.5 to 2.5 parts by weight of a wax containing a component with 45 or more carbon atoms and having an average number of carbon atoms of 28 to 38 and 3.0 to 7.0 parts by weight of antioxidant containing 30 to 100% by weight of N-(1-methylheptyl)-N′-phenyl-p-phenylenediamine per 100 parts by weight of a diene rubber component.

Abstract: In a first aspect, the invention provides a diol latex composition comprising: (a) latex polymer particles comprising a residue of an ethylenically unsaturated monomer, wherein the latex polymer particles have a size below 1000 mn; (b) a surfactant; and (c) a continuous liquid phase comprising a diol component, wherein the diol component comprises from 60 to 100% by weight of the continuous phase, wherein the latex polymer particles are dispersed in the continuous phase.

Abstract: This invention relates to mixtures of organosilane-polysulphanes of the general formula (RO)3Si(CH2)xS—Sz—S(CH2)xSi(OR)3  (I) in which R means alkyl, linear or branched, having 1-8 C atoms, in particular 1-3 C atoms x means an integer from 1-8 z means 0 to 6, wherein sum of the proportions of polysulphanes in which z=0 and z=1 amounts to ≧80% by weight, providing that the proportion of compounds in which z=0 remains below 80% and the proportion of organosilanepolysulphanes in which z means an integer from 2 to 6 does not exceed a proportion of 20 wt. % in the mixtures, and to the rubber compounds produced using these mixtures, in particular for tire treads.

Abstract: A rubbery adhesive composition wherein at least one adherend is a rubber composition including butadiene rubber as a rubber ingredient, characterized in that butadiene rubber is included as a rubber ingredient and 3˜20% by weight of the butadiene rubber is syndiotactic-1,2-polybutadiene. Thus, it is possible to enhance the strength of the rubbery adhesive composition itself to improve the adhesion property before and after vulcanization without damaging the adhesion property at the interface.

Abstract: The rubber composition of the present invention comprises a rubber component which is a blend rubber of a copolymer rubber and other diene based rubbers or the copolymer rubber alone, the copolymer rubber having a glass transition temperature of −60° C.

Abstract: Radiation polymerizable vinylether-based compositions, and cured vinylether-based formulations having a predetermined balance of tack, peel and shear particularly suitable for use in pressure sensitive adhesives are described.

Abstract: Novel elastomeric compositions are disclosed, incorporating silicon-treated carbon black and pre-vulcanization modifier selected from non-silane polysulfidic organo-compounds. The silicon-treated carbon black particulate filler differs chemically and in its performance characteristics from simple mixtures of silica and carbon black fillers. The pre-vulcanization modifier is effective to substantially increase bound rubber content in the product of a non-productive thermomechanical working of a base composition incorporating the silicon-treated carbon black particulate filler and SBR or other such unsaturated elastomer. The thermal working takes place at a maximum temperature sufficient to vulcanize the unsaturated elastomer if it were in the presence of a suitable vulcanization system.

Abstract: A rubber composition comprised of an elastomer(s), reinforced with a particulate carbon black composite, said composite composed of carbon black having an integral silica on the surface thereof, together with a coupling agent. A method of adjusting electrical conductivity of a rubber composition containing such carbon black composite reinforcement is also provided. A tire having a component of such rubber composition such as, for example, a tread, is specifically contemplated.

Abstract: A method for preparing a rubber seal product of a type which contacts a metal surface for sealing thereof, comprising the steps of: preparing a rubber composition comprising acrylonitrile butadiene rubber (NBR), (A) a carbocyclic phosphite compound represented by the general formula ##STR1## where R is an alkyl group having 8 to 24 carbon atoms, or a phenyl group having a mono-, di- or tri-substituted alkyl group having 1 to 10 carbon atoms, and (B) an acid phosphate compound represented by the general formula ##STR2## where R' is a hydrogen atom, or an alkyl group having 1 to 13 carbon atoms, and R" is an alkyl group having 1 to 13 carbon atoms, the phosphate compound having an acid number of about 150 to 800 KOH mg/g; wherein a total of about 5 to 20 parts by weight of compound (A) and compound (B) are present in the composition based on 100 parts by weight of NBR, vulcanizing the rubber composition to obtain a vulcanized rubber composition; and compressing the vulcanized rubber composition toward a metal s

Abstract: The present invention provides a rubber composition and a pneumatic tire using the rubber composition. A rubber composition comprises silica in an amount of 10 to 85 parts by weight per 100 parts by weight of natural rubber and/or diene synthetic rubbers. A polysulfide silane coupling agent having a specific distribution of sulfur reacts with a trivalent phosphorus compound such that a content of high polysulfide in the polysulfide silane coupling agent is reduced. The rubber composition further comprises 1 to 20% by weight, based on an amount of the silica, of the polysulfide silane coupling agent having a specific distribution of sulfur such that a content of high polysulfide component is small. The pneumatic tire has an excellent low heat buildup property.

Abstract: A chloroprene rubber composition which contains carbon black and of which the breaking elongation A and the static modulus in shear B of the vulcanizate satisfy the following formula:A.gtoreq.-36.4.times.B+1090 (1)where A is the breaking elongation (%) and B is the static modulus in shear (kgf/cm.sup.2).

Abstract: A solid coupling agent for use in a vulcanizable rubber compound containing siliceous filler. The coupling agent includes an organosilane, a powderizing agent, and a fatty acid dispersion aid including fatty acid and a salt-forming agent.

Abstract: A method of preparing a pre-formed elastomer/filler composite of a diene-based elastomer and particulate filler dispersed therein by polymerizing monomers in the presence of said filler with a polymerization promoting catalyst in which at least a portion of said catalyst is pre-deposited on said filler. Such pre-formed elastomer composite is also contemplated as well as a rubber composition comprised of a blend of such pre-formed composite and at least one additional elastomer. Such filler may be, for example, precipitated silica, carbon black and/or a modified carbon black. A tire having a component of such composite or rubber composition such as, for example a tread, is also provided.

Abstract: Novel solid supported anionic polymerization initiators that are multiply metalated with Group IA alkali metal atoms are provided and employed to produce extremely high molecular weight branched diene polymers. The initiators are prepared by metalating a particle comprising a thermoplastic polymer or a cured elastomer in the presence of a polar coordinator. The polymers obtained by anionic polymerization employing the initiators are multiply branched, with a polymer chain covalently attached to the particle at virtually every metalation site. The macro-branched polymers exhibit desirable properties, such as an extremely high molecular weight, a controlled molecular weight distribution, T.sub.g and vinyl content, and the ability to readily absorb hydrocarbon solvents and oils. The polymers are easily compounded to form vulcanizable elastomeric compounds and articles that have excellent resistance to wear and tear and exhibit reduced hysteresis properties.

Abstract: A rubber-processing additive for use in bridging rubber grind and virgin rubber. The rubber-processing additive consists of a zeolite, a high molecular weight fatty acid, and a starch. The compound binds the rubber grind to the virgin rubber. The inventive compound is also composed of components that are non-toxic. The compound does not significantly affect the physical properties of the virgin rubber. A method for using a rubber-processing additive to bind rubber grind to virgin rubber is also provided. The method includes the step of adding the inventive compound to a mixture of rubber grind and virgin rubber.

Abstract: A rubber composition having improved properties containing a starting rubber (e.g., diene rubber) and a compounding agent consisting of a silane coupling agent and a carbon black, calcium carbonate or stearic acid powder impregnated with a polysiloxane having the following alkoxysilyl group (I) and/or acyloxysilyl group (II) and having an average degree of polymerization of 3 to 10,000:.tbd.Si--OR.sup.1 (I).tbd.Si--OCOR.sup.2 (II)wherein, R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 18 carbon atoms or an organic group containing an ether bond and R.sup.2 is hydrogen or a hydrocarbon group having 1 to 21 carbon atoms.

Abstract: Rubber compositions which contain a complex of zinc hexasulfide with an amine, together with a vulcanization accelerator exhibit favorable vulcanization behavior, and their vulcanizates show improved properties.

Abstract: The present invention relates to rubber compositions containing borate compounds of the formula ##STR1## wherein R.sup.1 and R.sup.2 are independently selected from the group consisting of alkoxy radicals having from 1 to 8 carbon atoms; R.sup.3 is selected from the group consisting of alkylene groups having from 1 to 15 carbon atoms and arylene and alkyl substituted arylene groups having from 6 to 10 carbon atoms; X is selected from the group consisting of ##STR2## and Y is selected from the group consisting of S.sub.x and Se.sub.xwhere x is an integer of from 1 to 8.

Abstract: A process is described for preparing a functionalized EPM or EPDM artificial latex from the EPM or EPDM polymerization reactor without isolating the polymer. The process includes i) post polymerization functionalizing of an EPM or EPDM copolymer, ii) dispersing the functionalized copolymer in water with an appropriate surfactant and iii) removing the solvents. The resulting latex is useful in paper coatings, latex coatings, adhesives, and in impact modifiers.

Abstract: Provided is an automobile vibration-isolating rubber composition, characterized in that a rubber component comprises from 10 to 80% by weight of a polybutadiene rubber which is obtained through the polymerization using a rare-earth element catalyst and which has a cis content of 97% or more, and from 90 to 20% by weight of at least one type of a rubber selected from a natural rubber, a synthetic polyisoprene rubber and a polystyrene-butadiene copolymer rubber. The automobile vibration-isolating rubber obtained by vulcanizing the rubber composition of the present invention has a low dynamic factor compared to the conventional product, making it possible to decrease a room noise caused by a road noise.

Abstract: A silica-blended rubber composition comprising 100 parts by weight of sulfur-vulcanizable rubber blended with 10 to 100 parts by weight of silica, 3 to 20% by weight of a silane coupling agent based on the silica and 1 to 20% by weight of sodium borate based on the silica. An alkoxy group-containing silane coupling agent is preferred as the silane coupling agent, and sodium tetraborate is preferred as the sodium borate.

Abstract: The invention relates to aqueous crosslinking polymer dispersions which are characterized in that they consist ofA) 98 to 80 wt. % of a 40 to 60% aqueous alkaline polymer dispersion based on 2-chlorobuta-1,3-diene, with a pH of .gtoreq.9.5 and a chloride content, arising from the elimination of chlorine atoms from the polymer, of .gtoreq.300 ppm, andB) 2 to 20 wt. % of polyisocyanates obtained by the cyclotrimerization of aliphatic and/or cycloaliphatic diisocyanates, containing NCO groups bonded predominantly or exclusively as secondary groups,and to their use for the preparation of water-based adhesives.