Abstract: A method of treating a metallic cord to improve its ability to adhere to rubber is disclosed. The method involves contacting the metallic cord with a naphthenic oil containing from 1 to 53 percent by weight of a soluble cobalt salt and thereby deposit from 0.002 to 0.7 grams of cobalt per kilogram of steel to the metallic cord.

Abstract: This invention discloses a process for devulcanizing the surface of reclaimed rubber crumb into surface devulcanized reclaimed rubber crumb that is suitable for being recompounded and recurred into high performance rubber products, said process comprising the steps of (1) heating the reclaimed rubber crumb to a temperature within the range of about 150° C. to about 300° C. under pressure of at least about 3.4×106 Pascals in the presence of 2-butanol to devulcanized the surface of the rubber crumb thereby producing a slurry of the surface devulcanized reclaimed rubber crumb in the 2-butanol, wherein the reclaimed rubber crumb has a particles size which is within the range of about 325 mesh to about 20 mesh, and (2) separating the surface devulcanized reclaimed rubber crumb from 2-butanol.

Abstract: This invention is based upon the unexpected discovery that the surface of reclaimed rubber crumb particles can be devulcanized by heating the crumb particles to a temperature of at least about 150° C. under a pressure of at least about 3.4×106 Pascals in the presence of 2-butanol. It is further based upon the unexpected discovery that such surface devulcanized rubber crumb particles having a particle size within the range of about 325 mesh to about 20 mesh can be recompounded and recurred into high performance rubber products; such as, tires, hoses and power transmission belts. This invention more specifically discloses a process for devulcanizing the surface of reclaimed rubber crumb into surface devulcanized reclaimed rubber crumb that is suitable for being recompounded and recurred into high performance rubber products, said process comprising the steps of (1) heating the reclaimed rubber crumb to a temperature which is within the range of about 150° C. to about 300° C.

Abstract: Runflat tires are generally made by including a stiff insert in the sidewall thereof. This insert should be as stiff as possible to help support the weight of the vehicle to which the tire is mounted in situations where there is a loss of air pressure. During periods of operation after loss of air pressure the stiff insert carries most of the load on the tire which leads to the generation of heat. Heat build-up can then lead to thermal degradation in the insert. A reduction in crosslink density and a change in the distribution of crosslink types is the result of this thermal degradation. This invention is based upon the discovery that thermal degradation in the inserts of runflat tires can be inhibited by including a bis-citraconimido compound therein as an antireversion agent.

Abstract: This invention discloses a process for devulcanizing the surface of reclaimed rubber crumb into surface devulcanized reclaimed rubber crumb that is suitable for being recompounded and recured into high performance rubber products, said process comprising the steps of (1) heating the reclaimed rubber crumb to a temperature which is within the range of about 150° C. to about 300° C. under a pressure of at least about 3.4×106 Pascals in the presence of a solvent selected from the group consisting of alcohols and ketones, wherein said solvent has a critical temperature, which is within the range of about 200° C. to about 350° C., to devulcanize the surface of the rubber crumb thereby producing a slurry of the surface devulcanized reclaimed rubber crumb in the solvent, wherein the reclaimed rubber crumb has a particle size which is within the range of about 325 mesh to about 20 mesh, and (2) separating the surface devulcanized reclaimed rubber crumb from the solvent.

Abstract: This invention discloses a process for devulcanizing the surface of reclaimed rubber crumb into surface devulcanized reclaimed rubber crumb that is suitable for being recompounded and recurred into high performance rubber products, said process comprising the steps of (1) heating the reclaimed rubber crumb to a temperature which is within the range of about 150° C. to about 300° C. under a pressure of at least about 3.4×106 Pascals in the presence of 2-butanol to devulcanize the surface of the rubber crumb thereby producing a slurry of the surface devulcanized reclaimed rubber crumb in the 2-butanol, wherein the reclaimed rubber crumb has a particle size which is within the range of about 325 mesh to about 20 mesh, and (2) separating the surface devulcanized reclaimed rubber crumb from the 2-butanol.

Abstract: A radial ply pneumatic tire (10) features a bead core (20) which comprises an arrangement of filaments (26) positioned relative to one another. The bead core (20) has a cross-section and a radially inward base side (44), a radially outermost side (46), an axially inward first side (48), and an axially outward second side (50). In the cross section, the base side (44) of the bead core (20) has a width which is substantially linear and is between 50% to 75% of the rim seat width. The bead core base side (44) is inclined at least 15° relative to the bead's axis of rotation, while the bead heel surface has an as molded inclination at the central portion (61) radially inward of the bead base (44) at an angle of at least 10° with respect to the bead's axis. An associated rim (22) has a pair of humps (80) and a rim flange (76) associated with each hump (80).

Abstract: There is disclosed a zinc-rich coated steel article which is characterized by an outer layer of rubber containing a weight ratio of sulfur vulcanizing agent to total accelerator ranging from 0.4:1 to 0.8:1.

Abstract: A halobutyl rubber is generally used in the innerliner of pneumatic tires to retard the escape of air used to inflate the tire, thereby maintaining tire pressure. Since halobutyl rubbers, such as bromobutyl rubber, are generally the most expensive elastomers used in tires, it is desirable from a standpoint of cost reduction to reduce the level of halobutyl rubbers used in tires. The present invention relates to a technique for reducing the quantity of halobutyl rubber utilized in the innerliner of tubeless pneumatic vehicle tires. The present invention more specifically relates to a tire innerliner and pneumatic tires containing the same, which are prepared from a composition comprising, based on 100 parts by weight of rubber, a blend of (1) about 50 parts to about 90 parts of a halobutyl rubber and (2) about 10 parts to about 50 parts of a styrene-isoprene-butadiene terpolymer rubber having a first glass transition temperature which is within the range of about -110.degree. C. to about -20.degree. C.