Importance

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Abstract

A low temperature self-sealing roofing adhesive blend comprising (a) 50-95% by weight of a bituminous component having an asphalt component Index (ACI) less than 0.26 and an asphaltene content less than 20% which component is a road paving asphalt or a blend of road paving asphalt and a hard resin asphalt combined in a weight ratio of between about 1:2 and about 5:1; (b) 1-6% by weight of a thermoplastic block polymer of styrene and butadiene monomers consisting essntially of between 0% and 90% of the styrene/butadiene diblock polymer having a Brookfield viscosity (25 wt. % toluene solution) at 77.degree. F. of between about 500 and about 5,000 cps and between 100% and 10% of the styrene/butadiene/styrene triblock polymer having a Brookfield viscosity (25 wt. % toluene solution) at 77.degree. F. of between about 1,000 and about 50,000 cps and (c) 4-40% by weight of an inert filler. The invention also pertains to the use of the above blend as a roofing self-sealing adhesive.

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First Claim