Carbon-silica dual phase filler

Abstract Plasma polymerization is a technique for modifying the surface characteristics of fillers and curatives for rubber from essentially polar to nonpolar. Acetylene, thiophene, and pyrrole are employed to modify silica and carbon black reinforcing fillers. Silica is easy to modify because its surface contains siloxane and silanol species. On carbon black, only a limited amount of plasma deposition takes place, due to its nonreactive nature. Oxidized gas blacks, with larger oxygen functionality, and particularly carbon black left over from fullerene production, show substantial plasma deposition. Also, carbon/silica dual-phase fillers react well because the silica content is reactive. Elemental sulfur, the well-known vulcanization agent for rubbers, can also be modified reasonably well. 

CSDPF 2124 Carbon/silica dual phase filler 1.5... 

Discussion - Some surface modification does take place on all carbon black samples. On the other hand, in the case of the oxidized gas black, its larger oxygen functionality clearly increases its capability to be modified. The case of carbon/ silica dual-phase fillers is similar. The TGA data show that the higher silica content... 

CSDPF Carbon-silica dual phase fillers... 

Additives used in final products Fillers barium and strontium ferrites, boron carbide, calcinated clays, calcium carbonate, carbon black, carbon-silica dual phase filler, clays, dolomite, fumed silica, iron oxide, magnesium aluminum silicate, magnesium carbonate, mica, montmorillonite, nickel zinc ferrite, nylon fibers, pulverized polyurethane foam, quartz, silica carbide, soapstone, talc, zinc oxide Plasticizers naphthenic oil, polybutene, aromatic oil, esters of dicarboxylic acid Plasticizers adipates, aromatic mineral oil, paraffin oil, phosphates, phthalates, polyethylene glycol, processing oil, sebacates Antistatics dIhydrogen phosphate of 8-amlnocaprolc add. Iodine doping Antistatics carbon black, quaternary ammonium salt, zinc oxide whisker Antiblocking diatomaceous earth Release propylene wax Slip erucamide+stearamide ... 

Carbon black-silica dual phase fillers reduce hysteresis while maintaining or improving abrasion. This system is less expensive as coupling agent requirement is less and produces semicon-ductive product compared to full silica-filler system. Dual phase filler is less abrasive to the processing equipment compared to the usage of silica filler alone, but use of dual phase filler increases cost of compound compared to traditional carbon black. 

In-process modification includes metal addition, development of inversion blacks or nanostructure blacks, and carbon black-silica dual phase fillers. 

CSDPF 4210 Carbon/silica dual 154 phase filler 55% silica Cabot... 

---