P-Phenylene Antioxidant and Antiozonant N, N'-Dixylene-P-Phenylenediamine (CAS No. 68953-84-4)

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Abstract<br /> N, N'-dixylene-p-phenylenediamine (CAS No. 68953-84-4), CAPOX DTPD, is a mixture of diaryl-p-phenylenediamines, which can be classified in p-phenylene antioxidant, is an excellent antiozonant to chloroprene rubber. It is the effective antioxidant used in the tire industry also widely used frubber products.<br /> CAPOX DTPD can be used as an antioxidant, antiozonant, anti-flex cracking agent fmany natural synthetic elastomer compounds. Its capacity to resist groove cracking flex cracking is similar to antioxidant 4010 NA 4020, superito antioxidant A antioxidant D.<br /> <br /> Identification<br /> Name: N, N'-dixylene-p-phenylenediamine (CAS No. 68953-84-4)<br /> Synonyms : 1, 4-Benzenediamine, N, N'-mixed pH tolyl derives<br /> Blend of phenyl tolyl p-phenylenediamines<br /> Mixed di-aryl-p-phenylenediamines<br /> Mixed diaryl-p-phenylenediamines<br /> Diaryl-p-phenylenediamines<br /> CAS Registry Number: 68953-84-4<br /> EINECS: 273-227-8<br /> <br /> Properties<br /> Appearance: Blue-brown flakes<br /> Melting Point: 90~100 C degree<br /> Thermal Loss (65 C): ≤ 0.5 %<br /> Ash (800 C): ≤ 0.3 %<br /> <br /> Equivalents<br /> Chemtura (formerly Crompton-Uniroyal Chemical) Novazone AS<br /> LANXESS (formerly Bayer chemical) Vulkanox 3100<br /> Eliokem (formerly Goodyear chemical) Wingstay 100/Polystay 100/Nailax B<br /> PMC Group (formerly ICI's rubber chemicals) ACCINOX 100<br /> SUMITOMO Antigene DTP<br /> <br /> Application<br /> Tire Durability Application<br /> Tire durability is affected by many factors including the ingredients methods used in manufacture as well as the type conditions of use by the consumer. Tire components are exposed to heat from constant flexing appropriate antioxidants must be used to protect most commonly used rubbers from thermal degradation over the lifetime of the tire. Ozone in the air can also degrade rubber, antiozonants are employed to minimize this effect. Antiozonants are defined, as compounds, which react with ozone before it reacts with the polymer usually, consist of PARA-phenylene diamines such as CAPOX DTPD.<br /> <br /> Flex Cracking Application<br /> Tires in service are subject to continuous bending flexing, which gradually weaken the rubber compounds may lead to failure by crack formation. The term is generally used to describe the spontaneous formation growth of cracks caused by periodic mechanical stressing of vulcanizates accelerated when exposed to oxygen. This oxidative mechanism differs from ozone cracking.<br /> Obviously, good flex cracking resistance will be needed, especially ftire sidewall applications. However, most tire components will also require good fatigue resistance, especially the apex, the base, the belt skim coat inner liner. Flex cracking resistance of the vulcanizates is strongly dependent on the type of polymer used can be improved by addition of antioxidants. Antioxidants offering the best protection against flex cracking are amine-based, with p-phenylene diamines being extremely effective.<br /> <br /> Groove Cracking Application<br /> Groove cracking describes splits tears, which form at the base of the grooves of a tire tread pattern, due either to growth of cuts made mechanically to spontaneous formation growth of cracks. Tears during molding, potread pattern design, flexing fatigue of the rubber due to poflex properties, flexing fatigue due to overload under inflation of the tire, can contribute to groove cracking cut growth. The groove cracking resistance of the tread is dependent on the polymer composition; The type of crosslinking agent compounding ingredients employed (especially the Antidegradants). The classes of PARA-phenylene diamine Antidegradants have demonstrated good protection against groove cracking, especially the diaryl-PARA-phenylene types such as CAPOX DTPD.