Improved Vinylic Fillers for the Reinforcement of GR-S Type Elastomers

摘要

In this work all vinylic fillers were prepared using a polymeric emulsifier to obtain low heat build-up stocks when such fillers are combined with GR-S; additional improvements were developed by surface-treating the resultant vinylic fillers with accelerating reagents formed from carbon disulfide, an amine with or without an aldehyde, sulfur, etc. GR-S 1500 tire tread compounds reinforced with 40 pts surface-treated S/DVB vinylic fillers were thus prepared with as high as 3600 to:4000 psi cold tensile strength, 1120 to 1610 hot (212°F) tensile strength and 84 to 90°F Goodrich flexometer heat build¬up (see Table V). In comparison 50 pt HAP carbon black control showed corresponding values of 3230 psi, 1490 psi and 94°F respectively. The surface treatment employed carbon disulfide, an amine and sulfur.