PREPARATION OF A BITUMEN COMPOSITION BY MIXING GROUND (RECYCLED) VULCANIZED RUBBER WITH AN OIL, HEATING AND THEN DISPERSING IN A BITUMEN COMPOSITION

摘要

PCT No. PCT/CA93/00562 Sec. 371 Date Sep. 12, 1995 Sec. 102(e) Date Sep. 12, 1995 PCT Filed Dec. 29, 1993 PCT Pub. No. WO91/14896 PCT Pub. Date Jul. 7, 1994The present invention provides a procedure for at least partial dissociation of crumb rubber vulcanate network, including automobile tires, and for the incorporation of this treated rubber into stable bitumen compositions. The at least partially dissociated rubber vulcanate network may be used independently as a bitumen modifier, or a stabilizing agent for ground vulcanate rubber dispersions in bitumen or as a steric stabilizer in dispersion of polyolefins in bitumen. The at least partially dissociated rubber vulcanate network materials are produced in situ in bitumen or produced separately and subsequently incorporated into bitumen and the bituminous compositions are useful materials for a variety of applications. Modifications are possible within the scope of this invention.