Bituminous compositions containing two polymers

Details Bituminous compositions containing two polymers Bituminous compositions containing two polymers

1975-02-28

1976-08-31

Jacobs, Lewis T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 336AO, 260 338R, 260 338UA, C08L 9100

Patent

active

039780147

ABSTRACT:
Bituminous composition with improved adhesive properties comprising:
A. 95-75%w of a bituminous component Q having an aromaticity exceeding 0.004 .times. P + 0.280, in which P is the n-heptane asphaltene content;
B. 4-15%w of a block copolymer M.sub.1, preferably a polystyrene-polyalkadiene-polystyrene;
C. 4-15%w of a thermoplastic polymer M.sub.2, different from M.sub.1 and which has a mol. weight above 10,000, a solubility parameter 7.8 - 8.8 and a crystallinity below 60 percent at 25.degree.C.

REFERENCES:
patent: 2716073 (1955-08-01), Cunder
patent: 3325430 (1967-06-01), Grasley
Railsback, "Rubber Age", Jan. 1964, pp. 583 to 587.

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