Water-in-oil bituminous dispersions and methods for...

Details Water-in-oil bituminous dispersions and methods for... Water-in-oil bituminous dispersions and methods for...

2007-11-20

2007-11-20

Brunsman, David M (Department: 1755)

Compositions: coating or plastic

Coating or plastic compositions

Bituminous material or tarry residue

C524S060000, C524S061000, C404S017000, C404S034000, C427S138000

Reexamination Certificate

active

11391146

ABSTRACT:
There is provided a method for making bituminous compositions comprising water-in-oil bituminous dispersion and aggregate by the steps of: preparing a solvent-free, water-in-oil bituminous dispersion comprising: (1) bitumen, in an amount from about 75.0% to about 95.0% by total weight of the bitumen dispersion; (2) a surfactant in an amount from about 0.05% to about 2.0% by total weight of the bitumen dispersion; and (3) water in an amount to complete the water-in-oil bituminous dispersion, and producing the bituminous composition having a temperature from about 50° C. to about 120° C. by mixing: (1) the water-in-oil bituminous dispersion of step (A), having a temperature from about 75° C. to about 95° C., in an amount from about 2.0% to about 10.0% by total weight of the bituminous composition, and (2) aggregate, having a temperature from about 60° C. to about 140° C., in an amount from about 90.0% to about 98.0% by total weight of the bituminous composition.

REFERENCES:
patent: 5085704 (1992-02-01), Schilling et al.
patent: 5743950 (1998-04-01), Hendriks et al.
patent: 2002/0170464 (2002-11-01), Larsen et al.
patent: 2005/0135879 (2005-06-01), Grubba et al.
patent: 2007/0060676 (2007-03-01), Reinke

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