POLYURETHANE VULCANIZATES FOR TRACK PAD APPLICATION.
ROCK ISLAND ARSENAL ILL
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Several commercial millable gum polyester and polyether urethane elastomers were compounded for optimum stress-strain properties in the 75 to 400F. range. The effects of various types and amounts of carbon black, curatives and co-agents in peroxide and sulfur curable polymers were evaluated. Tank track pads were fabricated from promising compounds. Stress-strain properties at elevated temperatures were found to be dependent on the base polymer, and the amounts and types of curative and carbon black. Two millable polyester urethanes reinforced with SAF or ISAF black and cured with dicumyl peroxide, and a diisocyanate, were found to have the best ambient and high temperature stress-strain properties. Author