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US 4,728,683 AGranted
Surface dressing of roads
AssigneeExxon Research & Engineering Co.
InventorsJozef A. F. Smits, Marc P. Plaindoux
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Abstract
Ethylene-vinyl acetate copolymers having a melt index of 700-10,000 and a vinyl acetate content of from 1-40% by weight (based on the copolymer) are used as components of bitumenous binder compositions for the surface dressing of roads to improve the temperature range of their operability, the particular EVA's are also found to have good compatibility with the types of bitumen used.
Claims4
An aqueous emulsion for use in surface dressing of roads, comprising:
- from 30% to 80% by weight water;
- and
- a binder composition, wherein said binder composition comprises from 45% to 99% by weight bitumen having a penetration of from 50 to 400, and from 1% to 25% by weight ethylene-vinyl acetate copolymer having a vinyl acetate content of from 1% to 40% and a melt index of from 700 to 10,000.
Dependencies are inferred from the claim text.