| abstract |
Excellent adhesives are prepared with: asphalt, about 40 parts by weight; an unsaturated rubber such as devulcanized tire rubber, 1 to 18 percent; a saturated rubber such as butyl rubber, 0.7 to 3 percent; a water-immiscible asphalt solvent, 20 to 41 parts; and water 5 to 20 parts. The devulcanized rubber, when used, may have been rendered more compatible with asphalt by having been previously compounded with about half its weight of polyethylene. |