Process for preparing rubber-modified asphalt compositions

Details Process for preparing rubber-modified asphalt compositions Process for preparing rubber-modified asphalt compositions

C - Chemistry, Metallurgy

08

L

C08L 95/00 (2006.01) C10C 3/00 (2006.01)

Patent

CA 2155165

A modified asphalt composition having improved low- temperature fracture properties is obtained by devulcanizing crumb rubber, preferably ground rubber tire. The devulcanization is effected without the use of harsh oxidizing treatments or the addition of potentially hazardous solvents, by fractional distillation of a mixture of the rubber and crude oil to a temperature at which substantially complete devulcanization occurs, around 300°C. Alternatively, the vulcanized crumb rubber can be directly blended with asphalt and the mixture heated to a devulcanization temperature with gentle stirring. Compositions are relatively inexpensive and simple to produce and, not having been oxidized, may be expected to show better long-term aging and fatigue performance compared to air-blown asphalts and the like.

Affiliated with

Also associated with

Rating

Process for preparing rubber-modified asphalt compositions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for preparing rubber-modified asphalt compositions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for preparing rubber-modified asphalt compositions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1364917