Bitumen/polymer coupling products and their preparation

Details Bitumen/polymer coupling products and their preparation Bitumen/polymer coupling products and their preparation

C - Chemistry, Metallurgy

08

L

400/1600

C08L 95/00 (2006.01) C08G 81/02 (2006.01) C10C 3/02 (2006.01)

Patent

CA 1058343

ABSTRACT OF THE DISCLOSURE It is known to prepare bitumen compositions for a number of uses. However pure bitumen compositions have a restricted utility due to the narrow temperature ranges at which it remains in a substantially solid but not brittle form. Bitumen has been modified by mixing it with other polymers, However this has not been entirely successful. The present invention seeks to overcome this drawback by providing a composition comprising a mixture of a bitumen having attached to at least a part thereof carboxylic acid groups, anhydride groups, or a mixture thereof, and ester, lactone, acyl chloride, imide, and amide derivatives thereof with a member of the group comprising: (a) a (co)polymer(1) also having attached thereto such groups, (b) a (co)polymer(2) having attached thereto at least two functional groups selected from the group hydroxyl, mercapto, amino and N-hydrocarbylamino, epoxyalkyl and isocyanato groups, wherein the amount of (co)polymer(2) is at most 20%w based on weight of composition.

221269

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