Abstract: There is disclosed a process for hydroformylation of carbon black. The carbon black is hydroformylated by reacting carbon black with carbon monoxide and hydrogen under hydroformylation conditions in the presence of a hydroformylation catalyst and organic reaction solvent. Addition of the hydroformylated carbon black enhances the rates of cure of sulfur vulcanizable rubber.

Abstract: There is disclosed a process for hydroformylation of carbon black. The carbon black is hydroformylated by reacting carbon black with carbon monoxide and hydrogen under hydroformylation conditions in the presence of a hydroformylation catalyst and organic reaction solvent. Addition of the hydroformylated carbon black enhances the rates of cure of sulfur vulcanizable rubber.

Abstract: There is disclosed a process for enhancing the rate of cure of a sulfur vulcanizable rubber. Addition of a hydroformylated rubber to a sulfur vulcanizable rubber enhances the rate of cure and concomitantly improves the rubber/filler interaction of the vulcanized rubber.

Abstract: A rubber comprised of a sulfur cured blend of polyoctenamer rubber, alkyl methacrylate grafted cis 1,4-polyisoprene rubber and at least one additional sulfur curable rubber. The invention is further directed to a tire or industrial rubber product having at least one of its indicated components comprised of such sulfur cured rubber composition.

Abstract: A vulcanizable composition which comprises diene rubber, an EPDM that has been modified to crosslink with the diene rubber, and a polymeric antidegradant, while being substantially free of staining antidegradants. This composition has particular utility in the sidewalls of tires.

Abstract: A coloring agent, preferably metallic particles, is disposed in a solution that contains unvulcanized diene rubber(s) and a rubber vulcanization accelerator. Crosslinkable silicone and/or modified EPDM may also be disposed in the solution. The coating material is substantially free of free sulfur, and preferably is also substantially free of carbon black. The accelerator scavenges sulfur from a vulcanized rubber substrate to auto-vulcanize the rubber solids, and any crosslinkable silicone and/or modified EPDM present. Coating materials that do not contain any coloring agent are also disclosed.

Abstract: A coloring agent, preferably metallic particles, is disposed in a solution that contains unvulcanized diene rubber(s) and a rubber vulcanization accelerator. Crosslinkable silicone and/or modified EPDM may also be disposed in the solution. The coating material is substantially free of free sulfur, and preferably is also substantially free of carbon black. The accelerator scavenges sulfur from a vulcanized rubber substrate to auto-vulcanize the rubber solids, and any crosslinkable silicone and/or modified EPDM present. Coating materials that do not contain any coloring agent are also disclosed.

Abstract: A method of preparing a composite of polyurethane bonded to the surface of a cured rubber substrate and the resulting composite. The method is comprised of first applying to a cleaned, cured rubber surface a coating of methylmethacrylate-natural rubber graft polymer and then applying a liquid polyurethane reaction mixture which is cured to form the resultant composite. The invention is particularly directed to the preparation of a tire comprised of a polyurethane carcass applied to a cured rubber tread and to a tire comprised of a polyurethane tread applied to a cured rubber carcass.

Abstract: A coloring agent, preferably metallic particles, is disposed in a solution that contains unvulcanized diene rubber(s) and a rubber vulcanization accelerator. Crosslinkable silicone and/or modified EPDM may also be disposed in the solution. The coating material is substantially free of free sulfur, and preferably is also substantially free of carbon black. The accelerator scavenges sulfur from a vulcanized rubber substrate to auto-vulcanize the rubber solids, and any crosslinkable silicone and/or modified EPDM present. Coating materials that do not contain any coloring agent are also disclosed.

Abstract: A coloring agent, preferably metallic particles, is disposed in a solution that contains unvulcanized diene rubber(s) and a rubber vulcanization accelerator. Crosslinkable silicone and/or modified EPDM may also be disposed in the solution. The coating material is substantially free of free sulfur, and preferably is also substantially free of carbon black. The accelerator scavenges sulfur from a vulcanized rubber substrate to auto-vulcanize the rubber solids, and any crosslinkable silicone and/or modified EPDM present. Coating materials that do not contain any coloring agent are also disclosed.

Abstract: Metallic particles are suspended in a solution that contains diene rubber solids and a sulfur rubber vulcanization accelerator dissolved therein. The coating material is substantially free of carbon black and free sulfur. The accelerator scavenges sulfur from an already vulcanized rubber substrate to autovulcanize the rubber solids and thereby secure the metallic particles in a coating on a rubber article.

Abstract: Metallic particles are suspended in a solution that contains diene rubber solids and a sulfur rubber vulcanization accelerator dissolved therein. The coating material is substantially free of carbon black and free sulfur. The accelerator scavenges sulfur from an already vulcanized rubber substrate to auto-vulcanize the rubber solids and thereby secure the metallic particles in a coating on a rubber article.