Method for sealing and priming prepared substrates for roadways

Coating processes – Coating pavement or the earth – Asphalt – bitumen – oil – or tar containing coating

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4273855, 4273936, 428489, 106277, 106278, B05D 510

Patent

active

055038719

ABSTRACT:
The present invention provides a method of sealing and priming a prepared substrate, such as a base or sub-base for a roadway, comprising the application of an amount of an emulsion consisting essentially of a first phase of a combination of resinous petroleum oil and an asphalt, a second phase of water, and suitable emulsifiers and stabilizers, where the ratios of the first asphalt and resinous oil phase to the second water phase in the total emulsion are from about a 1:1.8 to 1:11 ratio. The first phase comprises from about 0.3% to 21% asphalt (or equivalent compositions) and from about 3.3% to about 34% resinous petroleum oil (or oils with equivalent properties) based on the total weight of the emulsion. The second phase is of water which provides from about 62.5% to about 91.5% of the total weight of the emulsion. The emulsifiers and stabilizers are from about less than 0.16% to about 2.5% of the total weight of the emulsion. The emulsion may also include about 0.5% to 8% by weight of one or more polymeric additives such as styrene-butadiene rubbers, block polymers or other polymers capable of incorporation in the emulsion. In the amounts used in the invention, those polymers typically increase the durability, flexibility and ductility of the applied and cured emulsion.

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