Crumb rubber modified asphalt with improved settling properties

Details Crumb rubber modified asphalt with improved settling properties Crumb rubber modified asphalt with improved settling properties

1997-09-03

1998-12-22

Brunsman, David

Compositions: coating or plastic

Coating or plastic compositions

Bituminous material or tarry residue

524 59, 524 71, C09D19500

Patent

active

058512764

ABSTRACT:
An improved asphalt having enhanced settling properties. The asphalt includes crumb rubber particles which have been treated to produce a greater number of carboxylic sites on the surface of the crumb rubber. These carboxylic sites interact with the functional groups in the asphalt, resulting in a homogeneous mixture having improved separation characteristics as well as the improved rheological properties due to the inclusion of the crumb rubber particles.

REFERENCES:
patent: 4833205 (1989-05-01), Bauman et al.
patent: 5501730 (1996-03-01), Duong et al.
Verlinskaya et al., CA 108:22728 "Chemisorption of latexes . . . ", Sep. 1987.
Bissada et al., CA 100:196831 "Evaluation of rubberzied limestone filler in asphalt", Jan. 1984.
"PU Incorporating Surface-Modified Particles, Fibers" Dr. Bernard Bauman No date avail.

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