Modified asphalt compositions

Details Modified asphalt compositions Modified asphalt compositions

C - Chemistry, Metallurgy

08

L

400/1616

C08L 95/00 (2006.01) C08L 57/06 (2006.01)

Patent

CA 1333303

Modified asphalt compositions are described which comprise (A) asphalt, and (B) a minor amount, sufficient to reduce or retard degradation of the asphalt in service, of at least one carboxy ester-containing interpolymer derived from (B-1) at least one olefin monomer, and (B-2) at least one alpha, beta-unsaturated carboxylic acid or derivative there- of, said interpolymer having (1) pendant carboxylic acid ester groups derived from the esterification of the carboxy groups of the interpoly- mer with at least one alcohol containing at least about 4 carbon atoms. Generally, the modified asphalt composition will contain from about 0.01 to about 10% by weight, based on the weight of the asphalt, of the ester of a carboxy inter- polymer as defined. The modified asphalt compositions of the present invention are useful in roofing applications and in preparing aggregate-containing asphalt concretes which can be employed as paving compositions.

536257

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