Bituminous emulsions

Details Bituminous emulsions Bituminous emulsions

1997-04-18

1998-12-22

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

106277, 1062844, 252314, B01J 1300, C08L 9500

Patent

active

058514309

ABSTRACT:
An HIPR emulsion of bitumen in water is prepared by a method which comprises directly mixing 70 to 98% by volume of bitumen having a viscosity in the range 200 to 500,000 mPa.s at the mixing temperature with 30 to 2% by volume of an aqueous solution of an emulsifying surfactant, percentages being expressed as percentages by volume of the total mixture. Mixing is effected under low shear conditions in the range 10 to 1,000 reciprocal seconds in such manner that an emulsion is formed comprising highly distorted bitumen droplets having mean droplet diameters in the range 2 to 50 micron separated by thin films of water.
The emulsions can be cut back to provide stable emulsions of lower bitumen content which are useful in roadmaking and the formation of protective coatings.

REFERENCES:
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patent: 4450011 (1984-05-01), Schilling et al.
patent: 4523957 (1985-06-01), Graf et al.
patent: 4776977 (1988-10-01), Taylor
patent: 4934398 (1990-06-01), Chirinos et al.
patent: 5670087 (1997-09-01), Chirinos et al.
Emulsions and Emulsion Technology, Part I Edited by Kenneth J. Lissant, Marcel Derker, Inc. New York (1974) Pages "Contents", 6-9, 48-69, 102-125, 402-408, 434 & 435.

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