Polymer modified binder and plant mix modifier for asphalt and process of making
AssigneeChase Corporation
InventorsGeoffrey M. Rowe, Douglas Zuberer, Jeffrey A. Sargeant, Frederick F. Fischer, Jr., Steve M. Grendzinski, Richard W. Specht
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Abstract
The invention provides a polymer modified binder using an asphalt plant mix modifier comprising a mixture of thermoplastic polymers, comprising both elastomers and plastomers, blended with oils and dispersed in a powder medium to facilitate flow. The use of polymers in dry form has provides for a means of incorporating additives into asphalt that can be successfully performed within the normal range of temperatures used for the mixing and compaction of hot mix asphalt.
Claims18
A plant mix modifier for asphalt production, the modifier comprising:
- a thermoplastic material;
- oil;
- filler additives;
- and
- about 6 wt. % to about 20 wt. % of N,N′-ethylene bisstearamide;
- wherein the plant mix modifier is a free-flowing powder of discrete particles, each discrete particle including only one of i) the thermoplastic material, ii) the N,N′-ethylene bisstearamide, and iii) the filler additives, the plant mix modifier configured to mix with an asphalt binder and aggregate to form a hot mix asphalt.
A plant mix modifier for asphalt production, the modifier comprising:
- about 10 wt. % to about 40 wt. % of an elastomer;
- about 5 wt. % to about 30 wt. % of a plastomer;
- about 6 wt. % to about 20 wt. % of N,N′-ethylene bisstearamide;
- about 10 wt. % to about 35 wt. % of oil that comprises one or both of naphthenic oil and paraffinic oil;
- and
- about 15 wt. % to about 35 wt. % of filler additives;
- wherein the plant mix modifier is a free-flowing powder of discrete particles, each discrete particle including only one of i) the elastomer, ii) the plastomer, iii) the N,N′-ethylene bisstearamide, and iv) the filler additives, the plant mix modifier configured to mix with an asphalt binder and aggregate to form a hot mix asphalt.
Dependencies are inferred from the claim text.