Vultac 7 Amylphenol disulfide Atofina Antioxidants >> Phenolic Catalysts / Accelerators / Vulcanizing agents >> Phenolics Rubber - Elastomer (Chloroprene, Butyl …) Natural rubber (NR) ADHESIVE Antoxidant and stabilizer in both normal and high temperature sensitive adhesives. Greately improved shelf ageing and retention of tack VULTAC8 7, in the family of Vultacs (Amylphenol disulfides), is provided in a convenient flake form. Other grades of Vultacs (Vultac 2, 3 and 5), while unique in their activity, require special methods of handling due to their physical form. They are either soft and/or tacky resinous solids, a dust-prone powder, or a viscous liquid. The new VULTAC 7, on the other hand, is a stable, flaked material that is easy to handle. VULTAC 7 is very closely comparable to Vultac 3 in activity. For most applications, the following ratios may be used as a starting point when replacing Vultac 2 or Vultac 5 (75% Vultac 3 on inert carrier) with VULTAC 7. 1.0 Part of Vultac 2 = 0.3 Part of VULTAC 7 1.0 Part of Vultac 5 = 0.75 Part of VULTAC 7 In certain formulations, even lower levels of VULTAC 7 than those indicated above are sufficient to obtain equivalent physical properties. For other grades of Vultac, appropriate ratios may be calculated using data which follow. Compared to other grades of Vultac, VULTAC 7 has a higher softening point (about 110- 130EC). Therefore, to assure good dispersion, compounds containing VULTAC 7 should be mixed at temperatures of 88EC (190EF) or higher. In the case of internal mixers, this may not be a problem, since the drop temperatures generally exceed 88EC. However, when open mill mixing is employed, mill roll temperatures should be raised to 88EC or higher at the end of the mixing cycle to obtain good dispersion. The vulcanizing activity of VULTAC 7 is illustrated and is compared with that of other typical Vultacs and elemental sulfur in the following tables. As the data indicate, VULTAC 7 offers essentially the same advantages over elemental sulfur that other grades of Vultacs provide. It is an excellent vulcanizing agent for chlorobutyl, SBR, nitrile, and natural rubbers and their blends. When Vultacs are used as partial or total replacements for sulfur, significant improvements in heat-aging and adhesion characteristics are obtained. The Vultacs may also serve in a secondary function as plasticizers, processing aids and tackifiers. Suggested applications of VULTAC 7 include tire innerliners, white side walls, coverstrips, adhesives, cements, semi-hard rubber articles and mechanical rubber articles. Amylphenol disulfide vulcanizing agent, antioxidant and stabilizer available in stable, flaked i.e. easy to handle form for normal and high temperature sensitive natural rubber, SBR, chlorobutyl and nitrile rubber formulations. Can also be used as plasticizer, processing aid and tackifier. Imparts improved shelf ageing, retention of tack, heat-ageing and adhesion.