Lightweight asphalt based building materials and process for making same
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United States of America Patent
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-
Jan 6, 1987
Issued Date -
N/A
app pub date -
Sep 16, 1985
filing date -
Jan 24, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lightweight asphalt roofing product wherein the asphalt-based coating has a specific gravity less than 1.0. A lightweight filler is used which has an effective specific gravity in the range of 0.10-0.50 and is present in the coating in the range of 3%-25% by weight of the filled coating. In a preferred embodiment, the filler particles have hollow, gas filled inclusions, and comprise expanded perlite particles or expanded permicite particles.
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Cited Art Landscape
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