DE2036123

• Main Authors: NUMATA, KENICHIRO, NISHINOMIYA, HYOGO, INOUE, MASATOSHI, TOYONAKA, OSAKA, SAGAWA, SEIJI, HIRAKATA, KUNIHIRO, HARUO, TAKATSUKI, KIMURA, OSAMU, TOYONAKA, OSAKA
• Format: Patent
• Language: English
• Published: 03.10.1974
• Edition: 1
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

1289767 Treatment of vulcanization accelerators SUMITOMO CHEMICAL CO Ltd 9 July 1970 [22 July 1969] 33346/70 Heading C2C Vulcanization accelerators, in particular sulfenamides of formula in which R 1 is hydrogen or a C 1 -C 4 alkyl group and R 2 is a C 1 -C 4 alkyl group or when R 1 is hydrogen, R 2 is a cyclohexyl group, or formula in which R 3 , R 4 , R 5 and R 6 are each C 1 -C 4 alkyl groups and n is 1 or 2, are produced in the form of small spheres by heating a mixture of the accelerator with a hydrocarbon which is liquid at the temperature to which the mixture is heated and introducing the oily product into an aqueous medium maintained at a temperature such that the hydrocarbon does not solidify when added thereto. Suitable hydrocarbons are, for example, benzene, toluene, xylene, ethylbenzene, isopropyl benzene, isopropyltoluene, diisopropyl benzene, diisopropyl toluene, mesitylene, ligroin, hexane, heptane, octane, pentane, decane and dodecane. The process is applicable to mixtures containing the vulcanization accelerator.