Abstract: This invention relates to a novel rubber composition having improved green properties such as high green tensile strength and high green modulus and improved hysteresis loss and cut growth property, which comprises 100 parts by weight of a diene rubber, about 20 to about 00 parts by weight of a reinforcing filler, about 0.1 to about 3.0 parts by weight of a nitroso compound having the formula (I) ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, are selected from the group consisting of a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, a hydroxyalkyl group having from 1 to 6 carbon atoms, a cycloalkyl group and an aryl group and about 0.1 to about 3.0 parts by weight of an halogenated organic compound having the formula (II) ##STR2## wherein R.sub.3 is selected from the group consisting of a hydrogen atom, a methyl group, a chlorine atom and a bromine atom and X is a chlorine atom or a bromine atom.

Abstract: A rubber composition in which a metal salt between a resin acid and cobalt is blended in a content of from 0.05 to 0.7 part by weight in terms of the content of a metal element with respect to 100 parts by weight of rubber containing not less than 70% by weight of at least one rubber of natural rubber and a synthetic polyisoprene rubber; as the metal salt is used a cobalt resinate which has a melting point in a range of 140.degree. to 180.degree. C., an oxidation degree of not more than 60% in a gas chromatography (GLC), and not more than 2,000 ppm of a sulfur concentration in the metal salt; when the metal salt is divided into a dissolved portion and an undissolved portion by using toluene and water, the undissolved portion in both toluene and water has a characteristic absorption of around 3,600 cm.sup.-1 in an infrared absorption spectrum (IR); and when elevated in temperature at a rate of 5.degree. C./min.

Abstract: The present invention is directed to a polyisocyanate preparation dispersible in water and having an average NCO functionality of about 2.0 to 3.5 which contains(a) an aliphatic polyisocyanate or a mixture of aliphatic polyisocyanates; and(b) a quantity of an emulsifier sufficient to ensure the dispersibility of the polyisocyanates.The present invention is also directed to the use of this polyisocyanate preparation as an additive for aqueous adhesives based on polymers dispersed in water.

Abstract: A method of regulating the coagulation characteristics of a binding agent aqueous dispersion which comprises adding thereto a compound of the formula ##STR1## in which R is an unsubstituted or hydroxy substituted alkyl or alkenyl radical,A is --O--CH.sub.2 --CH.sub.2 -- or --O--CH.sub.2 --CHOH--CH.sub.2 --,p is zero or 1,X is ##STR2## wherein r is an integer and both R.sub.x 's are hydrogen or one is a methyl or an ethyl radical and the other is a hydrogen atom,Y and Z are, independently, R--(A).sub.p --, as defined above, or a group as represented by but independent of X,m is zero or an integer 1 to 5, andn is an integer 2 to 6, the compound containing at least one group of the type represented by X, and being in free base, acid addition salt or quaternary ammonium salt form.Such modified binder dispersions are advantageous for the production of non-woven fabrics.

Abstract: Synthetic rubber is thermooxidatively stabilized with guayule resin. The guayule resin imparts favorable stabilization as evidenced by minimum bulk viscosity changes and minimum gel formation, especially with styrene-butadiene synthetic elastomers prepared by emulsion or hydrocarbon solvent techniques.

Abstract: The invention is directed to vulcanizable halogen rubber mixtures which contain 2-sec.amino-4,6-dimercapto-s-triazine, silica, and optionally carbon black.

Abstract: Carbon black which has been treated with organic peroxides imparts high scorch resistance to rubber into which it has been compounded.

Abstract: A rubber composition for use in a tire tread comprising (a) a polyisoprene rubber or a polyisoprene rubber and a synthetic rubber, (b) a denatured nitrosoquinoline compound and (c) carbon black.

Abstract: A low rate resilient bushing suitable for automobiles and other vehicles is disclosed where in the bushing, the carbon black reinforced rubber compound has been conventionally sulfur cured using an activator system of zinc oxide and certain soluble fatty acid materials.

Abstract: An erasable black ink composition for use in ball-point pens is disclosed. The composition comprises rubber, a low boiling solvent, a black pigment, a quality adjuster and a lubricant, wherein the content of the rubber is 18.9 to 20% by weight of the composition, the ratio by weight of the low boiling solvent to the rubber is in the range of 1.56:1 to 1.64:1, the ratio by weight of the pigment to the rubber is in the range of 0.8:1 to 0.9:1, and the ratio by weight of the quality adjuster to the pigment is in the range of 1.7:1 to 1.8:1. Traces of the ink can be erased by a rubber eraser within an initial period of time.

Abstract: Rubber compositions and metal-reinforced rubber ply members have improved metal adhesion and metal adhesion retention. The improvement comprises admixing from about 0.5 to about 10.0 parts per hundred rubber (phr) of bis(2-mercaptobenzothiazato) nickel with a vulcanizable rubber composition prior to combining the metal and rubber and then curing. A method for improving the metal adhesion and metal adhesion retention between a vulcanizable rubber and metal member includes the step of dispersing from about 0.5 to about 10.0 phr of nickel in a vulcanizable rubber composition prior to curing.

Abstract: A rubber composition containing carbon black as a reinforcing filler and a quaternary ammonium salt as a coupling agent and a method of making it are disclosed.

Abstract: A rubber composition containing carbon black and a second particulate filler of kaolin, metakaolin, talc, pyrophyllite coal, coke, graphite or metal carbonate filler and a method of making it are disclosed.

Abstract: A material intended to form a joint between at least two bodies on the outside of their interface, at least one of the bodies being deformable, is characterized by the following features:(a) it is formed of a fluid mixture having a viscosity, measured at normal temperature, of from 0.3 Pa.s to 700 Pa.s;(b) a dry extract of the fluid mixture, measured at normal temperature and pressure, is from 20% by weight to 80% by weight, based on the weight of the fluid mixture;(c) the dry extract of the fluid mixture comprises an elastomer fraction at least 20% by weight of which elastomer fraction is formed of at least one unsaturated elastomer capable of cross-linking either at ambient temperature or by heating for a period of time of less than one minute.Methods for producing assemblies with this material, consisting, for instance, of manufacturing, repairing or recapping a tire.Assemblies obtained by these methods.

Abstract: Disclosed are carboxylic acid containing polymeric microgel particles which are prepared by polymerizing in aqueous emulsion a monomer mixture containing about 10-50% by weight of polymerizable carboxylic acid monomers, up to 5% of a difunctional crosslinking monomer and one or more carboxyl-free relatively water insoluble polymerizable vinyl monomers. The resulting microgel particles are water-swellable and may be employed as stabilizers for use in the preparation of aqueous dispersions of film-forming resins containing smaller amounts of organic solvents than conventional aqueous dispersions of this type. Such dispersions are useful as coating compositions, yielding coatings having less water sensitivity and improved adhesion as compared with coatings obtained from conventional aqueous dispersions of film-forming resins.

Abstract: The present invention consists of treating the surface of a viscous semi-solid oil or water-in-viscous oil emulsion with a chemical dispersant composition that has a viscosity which is sufficiently high that the dispersant will remain in contact with the oil for a time sufficient to disperse it in the water. Thus, in one embodiment of the present invention a chemical dispersant composition for dispersing viscous, almost semi-solid oils in water comprises a dispersing agent and an oil soluble polymer in a ratio whereby said composition has a viscous, sticky, gel-like consistency.

Abstract: A gasket composition which will swell but not degrade in contact with hydrocarbon oil containing fluids in internal combustion engines comprises a fibrous system and an ethylene propylene rubber binder therefor. Desirably, the fibrous system comprises from 50 to 90% by weight of the composition and is selected from asbestos and aromatic polyamide fibers and the binder is an EPDM.

Abstract: Rubber compositions and metal-reinforced rubber ply members have improved metal adhesion and metal adhesion retention to brass and brass-plated metallic reinforcement. The improvement comprises admixing from about 0.5 to about 10.0 parts per hundred rubber (phr) of nickel molybdate, cobalt molybdate or a mixture thereof with a vulcanizable rubber composition prior to embedding the metallic reinforcement therein and curing. A method for improving the metal adhesion and metal adhesion retention between a vulcanizable rubber and brass or brass-plated metallic reinforcement includes the steps of dispersing from about 0.5 to about 10.0 phr of nickel molybdate, cobalt molybdate or a mixture thereof in a vulcanizable rubber composition prior to curing.

Abstract: This invention relates to a pressure-sensitive and conductive rubber, wherein an involatile or volatile liquid organic substance is impregnated with and swelled in a composite conductive rubber obtained by adding a conductive filler such as a carbon black, metallic fine powders or the like thereto, the involatile or volatile liquid organic substance having compatibility with the composite conductive rubber. The involatile or volatile organic substance immersed in the composite conductive rubber is penetrated between adjacent particles of the conductive filler, thereby respective distances between the adjacent particles thereof are widened and a conductivity resistance of energizing route in the composite conductive rubber under a normal condition is increased.

Abstract: A granular flame retardant additive is provided comprising from 70 to 99.5% by weight of an organohalide flame retardant and from 0.5 to 30% by weight of thermoplastic synthetic resin as a binder. The additive is easy to handle and resistant to disintegration during transportation and mixing with fabricating resin pellets. Uniform distribution thereof in fabricated thermoplastic articles is achieved by simply co-feeding the granules and the fabricating resin to a fabricating machine.

Abstract: The resistance of structural elastomer products, such as bearing blocks, to compressive forces is reduced by incorporating therein a plurality of small, separate, reinforcing elements of relatively hard material. Such materials include crushed rock, concrete, glass or certain slags and small metal pieces. The reinforcing elements are congregated in an interior section or core which is covered by a marginal section substantially free from reinforcing elements.

Abstract: A pneumatic radial tire is provided with a tread having from 1 part by weight of hydrated amorphous fine-particle silica per 3 parts of carbon black tread reinforcing filler, to about 3 parts by weight of the silica to 1 part of the carbon black. The amount of silica present is preferably in the range from about 18 parts to about 50 parts by weight per 100 parts of natural or synthetic rubber. When such a tread is compounded with a mercaptosilane in which the mercapto group is reversibly blocked, the tread provides reduced rolling resistance without loss of traction. Such reduction in rolling resistance without loss of traction is not observed when the silica is not coupled with the mercaptosilane coupling agent.

Abstract: A rubber composition comprising, in specific mixing ratios, rubber material consisting mainly of natural rubber and/or synthetic polyisoprene rubber, a cobalt salt of rosin, carbon black having specific iodine adsorbability and dibutyl phthalate absorbability, and sulphur.

Abstract: Mouldable and vulcanisable rubber mixtures are made containing a rubber (A) which still contains double bonds and which is cross-linkable by means of sulphur and a vulcanization accelerator or a mixture of rubber (A) with a different rubber (B), 0.2 to 10 parts of sulphur, 0.2 to 10 parts of a vulcanization accelerator and 1.0 to 10 parts of a bis-(alkoxysilylalkyl)polysulfide.There can also be present a silicate filler and/or a carbon black filler of rubber. The rubber mixtures have the silane, vulcanization accelerator and sulphur, calculated as S.sub.8 present in a molar ratio which causes the rubber mixture to have a reversion R=O (.+-.5%) resulting from the cross-linking isotherm at the vulcanization temperature where the reversion R is calculated according to Formula II ##EQU1## in which D.sub.max is the maximum vulcameter moment of rotationD.sub.min is the minimum vulcameter moment of rotationD.sub.

Abstract: Treatment of diene rubber with a diketo compound, in which the keto groups are part of a six-carbon hydrocarbon ring containing carbon-to-carbon unsaturation, or a tautomer of the compound, is performed at temperatures above 130.degree. C. Rubber compositions treated in this manner exhibit increased green strength, decreased plasticity, and, when vulcanized, decreased hysteresis.

Abstract: Rubber compositions and metal-reinforced rubber ply members have improved metal adhesion and metal adhesion retention. The improvement comprises admixing from about 0.5 to about 10.0 parts per hundred rubber (phr) of bis(2-mercaptobenzothiazato) nickel with a vulcanizable rubber composition prior to combining the metal and rubber and then curing. A method for improving the metal adhesion and metal adhesion retention between a vulcanizable rubber and metal member includes the step of dispersing from about 0.5 to about 10.0 phr of nickel in a vulcanizable rubber composition prior to curing.

Abstract: A rubber compound essentially for use in making conveyor belts on which tacky materials such as oil sands are transported without adhesion, comprising a base rubber such as acrylonitrile-butadiene rubbers, urethane rubbers, acryl rubbers and blends of these rubbers with polybutadiene rubbers, styrene-butadiene rubbers and natural rubbers, and an organic carboxylate such as alkyl oleates and alkyl stearates.

Abstract: Vulcanizable rubber stock based on diene rubber comprises oxidized oligomer derived from thermally decomposed rubber materials, which oligomer has a molecular weight of 450-86,000 and is contained in the compound in an amount of 5-68 parts by weight per 100 parts by weight of diene rubber.

Abstract: Compositions of vulcanizeable diene rubber, a cross-linking agent, a vulcanization accelerator and a vulcanization system alterative are disclosed, which have improved properties of scorch delay, cure rate and reversion resistance. The alterative is a compound of the formula ##STR1## where R.sub.1 and R.sub.2 are the same or different radicals selected from alkyl of 1-12 carbon atoms, phenyl, cycloalkyl of 3-8 carbon atoms and alkyaryl and aralkyl of 7-12 carbon atoms, and R.sub.3 is selected from the same as R.sub.1 and R.sub.2, optionally substituted with one or more halogen, nitro, alkoxy, carboalkoxy, acyl, acyloxy, amido, cyano, thio or sulfonyl substituents.

Abstract: Rubber compositions having improved tensile strength, elongation and modulus of unvulcanized rubbers without deteriorating physical properties of vulcanized rubbers are prepared by utilizing synergistic effect of addition of a filler having high reinforcing property and alkadiene sulfones in given amounts to natural rubber and/or dienic synthetic rubbers.

Abstract: A rubber composition is provided which comprises 100 parts by weight of basic rubber and 25 to 250 parts by weight of furnace carbon black having the particle properties defined by an N.sub.2 SA higher than 60 m.sup.2 /g and a DBP higher than 108 ml/100 g and the following selective characteristic values.True specific gravity.ltoreq.-0.0006.times.N.sub.2 SA+1.8379Tinting strength (%).gtoreq.0.6979.times.N.sub.2 SA-0.4278.times.DBP+203.3Range of aggregate size distribution (.DELTA.Dst).gtoreq.0.6118.times.(Dst mode diameter)+30.

Abstract: A reinforced rubber composition is provided comprising a mixture of (a) a sulfur vulcanizable rubber and (b) ground coal having an average mesh size of 25 or more and which produces an aqueous slurry with a pH of less than 7.0, and wherein a metallic reinforcing member is embedded in the rubber mixture of (a) and (b).

Abstract: A rubber composition for use in tire having good reinforcing properties and fatigue properties and an improved heat build-up is disclosed, which comprises 30 to 60 parts by weight, based on 100 parts by weight of rubber, of a carbon black having a nitrogen adsorption value (N.sub.2 SA) of 35 to 105 m.sup.2 /g, a DBP absorption value of 140 to 200 ml/100 g, a 24M4DBP absorption value of 60 to 120 ml/100 g and a .DELTA.DBP of 50 to 110 ml/100 g defined by .DELTA.DBP=DBP absorption value-24M4DBP absorption value.

Abstract: The resistance of structural elastomer products, such as bearing blocks, to compressive forces is reduced by incorporating therein a plurality of small, separate, reinforcing elements of relatively hard material. Such materials include crushed rock, concrete, glass or certain slags and small metal pieces. The reinforcing elements are congregated in an interior section or core which is covered by a marginal section substantially free from reinforcing elements.

Abstract: An adhesive composition comprising a mixture of water based polymer in latex form and a material generally referred to as a thickening agent is disclosed for removably adhering a product to a substrate, for example a carpet with an attached backing to a flooring substrate. The adhesive may be applied as a layer to the carpet backing, dried and subsequently activated with water to adhere the carpet to the floor. After drying, the adhesive layer may be reactivated with water to permit the carpet to be removed from the floor. The adhesive layer when dried on the surface of a latex foam backed carpet provides a non-tacky surface which additionally increases the abrasion resistance of the latex foam backing thereby reducing damage to the backing during normal storage and handling.

Abstract: Polymeric, advantageously elastomeric, e.g., natural or synthetic rubber, matrices including a reinforcing amount of a filler therefor, e.g., inorganic particulates, further comprise, as an interfacing additive between the matrix and the reinforcing filler, the condensation product of at least one polyamine with at least one carboxylic acid.

Abstract: Novel rubber compounding ingredients are disclosed. The ingredients, which may be used in a wide variety of rubber compounds having siliceous fillers comprise certain N-substituted melamines which act as silica coupling agents. The melamines bind both to the siliceous filler and to the rubber network to increase the reinforcement effect of the silica. Use of the melamines of the invention reduces the cost of producing the rubber when compared to rubbers containing prior art silica coupling agents.

Abstract: There is prepared a homogeneous mixture of 95 to 30% carbon black and 5 to 70% resorcinol. The resorcinol preferably either has an average particle size of 0.01 to 0.4 mm or is broken down to that size. The product is employed in rubber mixture to improve the adhesion of rubber vulcanizates to metal, textile fibers, glass fibers, or their structures.

Abstract: A rubber composition containing a phyllosilicate mineral filler is disclosed.

Abstract: The invention herein is directed toward a process of preparing free flowing thermoset resin particles of polybutadiene and includes the steps of physically mixing a filler material with polybutadiene followed by chopping the mixture into small particles or granules which are irregularly shaped. A vulcanizing agent can be added during the mixing step as well as other ingredients commonly added to polybutadiene resin formulations, as is customarily done in the art, without affecting the free flowing properties of the polybutadiene treated according to the process of this invention.

Abstract: A method of mixing crosslinkable elastomeric polymers and reinforcing fillers has been developed that yields significant improvements in physical properties compared to like polymers mixed by conventional methods. The method entails working a filler-polymer mixture at a temperature between the glass transition temperature and the liquid-liquid temperature of the uncrosslinked polymer to enhance filler integration. The mixture is then heated to a temperature greater than the flow temperature of the uncrosslinked polymer and worked so that air bubbles dispersed in the mixture are eliminated. The heating and cooling steps are repeated until the filler particles are thoroughly integrated and substantially all air bubbles are eliminated.

Abstract: A pressure-sensitive adhesive is prepared by blending (1) a small particle size latex having a hard monomer (such as styrene), a soft monomer (such as butadiene) and, optionally, an acid (such as itaconic acid), and (2) a tackifying resin. These adhesives have an excellent combination of properties including peel adhesion and shear adhesion.

Abstract: The invention relates to a process for preparing products containing polymer chains in which a linear prepolymer or polymer contains at least one free acid group at each chain and is reacted with an alkoxide of a metal having a valence of more than 2, such as zirconium, titanium or cerium, possibly in the presence of a non polar solvent, the alkoxide of the metal having a valence of more than 2 being used in such a quantity that the alkoxide functions are in excess with respect to the stoichiometric amount of the acid functions carried by said linear prepolymer or polymer, the reaction mixture being stirred in the presence of humidity until a product is obtained wherein the hydrogen atoms of the free acid end groups of the prepolymer or polymer are substituted by an atom of the metal (M) which is itself linked to another atom of said metal by M-O-M linkages. The invention relates also to the products containing a prepolymer or polymer .alpha.,.omega.

Abstract: A primer composition for use in the fluidized-bed dip-coating of thermoplastic resin powder, comprising a polymeric compound formed by polymerization of a diene compound, admixed with either magnesium oxide alone or magnesium oxide together with cobalt ion and/or manganese ion.

Abstract: A process for producing a colloidal solution of a curable resin which comprises:blending (a) 5 to 90% by weight of a polyfunctional maleimide component and (b) 95 to 10% by weight of at least one thermosetting resin,heating them to form a composition, andblending the resulting composition with at least one low boiling point solvent having a boiling point of more than room temperature and less than 150.degree. C., in which the thermosetting resin is rich soluble, but the maleimide component is poor soluble, thereby forming a colloidal solution of a curable resin is disclosed. The colloidal solution is used as a coating, as an impregnating agent for a coil, or for preparing prepreg.

Abstract: The invention relates to rubber articles, particularly spray forming means and spray jet forming means respectively, and their use in sanitary fittings. These are produced by vulcanization of a rubber mixture which contains besides caoutchouc and usual vulcanization additives and auxiliary agents graphite and preferably paraffin. With this mixture any lime deposits can easily detach themself or can even be completely prevented.

Abstract: Process oil is made by conversion from "waste" materials, particularly used oils, and most particularly used crankcase oils, by flash evaporation at about 250.degree. F. and filtration for removal of solids therefrom, to produce a product substantially free of water and low boiling point components and of contaminant solids, which has a flash point above 310.degree. F., or is blended with other products from the same process to produce a final product having a flash point above 310.degree. F., and an aromatic content above 10%, preferably above 20%, by weight. The product may be used generally in a wide variety of process oil applications but is most particularly adapted for use as a rubber process oil and such use is also part of the present invention.

Abstract: Bales of unvulcanized rubber, vulcanized rubber or compounding ingredients for unvulcanized rubber are packaged in film or bags made from syndiotactic 1,2-polybutadiene (1,2-SBD) containing at least one antiblock agent additive and at least one slip agent additive. Coextrusion can be used to manufacture bags or film having two or more layers where only the inside layer is heavily loaded with antiblock additives and the outside layer contains only a minimal amount of antiblock additives with both layers containing slip agents. The use of 1,2-SBD serves to eliminate the problems of incompatibility and disposal encountered in the prior art and provides film and bags having superior puncture and tear resistance when compared to a conventional material such as polyethylene.

Abstract: In a rubbery composition in which a silica containing material is utilized as a reinforcing agent, the hysteresis of the rubbery composition is improved by incorporating the silica containing material into the rubbery composition in the form of zinc modified silica. The zinc modified silica provides an improved reinforcing agent which improves the hysteresis of the rubbery composition when the rubbery composition containing the zinc modified silica is cured.

Abstract: An anticorrosive coating composition comprising (i) an aqueous medium, and dispersed therein, (ii) a water-soluble, film-forming and crosslinkable resin having a hydroxyl group and a proton-free onium salt radical and (iii) a chelate compound of titanium or zirconium.