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Use of an ester additive and paving grade asphalt in built up roofing asphalt composition manufacture
Use of an ester additive and paving grade asphalt in built up roofing asphalt composition manufacture
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机译:酯类添加剂和铺路级沥青在建筑屋顶沥青组合物中的用途
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摘要
Thermally stable built-up roofing asphalt (“BURA”) composition comprising a paving grade asphalt is disclosed. The paving grade asphalt has been over-blown to a first softening point and an additive is included in an amount to achieve a second softening point. The additive comprises at least at least one ester. The BURA composition is thermally stable at processing temperatures of at least 450° F.
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