Treatment of rubber to form bituminous compositions

Details Treatment of rubber to form bituminous compositions Treatment of rubber to form bituminous compositions

C - Chemistry, Metallurgy

08

L

C08L 95/00 (2006.01) C08J 11/20 (2006.01)

Patent

CA 2152774

Rubber, particularly crumb rubber from the recycling of tyres, is processed to effect partial or high levels of dissociation of rubber vulcanate network, in particular to form bituminous compositions in which the treated rubber, carbon black and other additives released are stably dispersed. Bitumen, hydrocarbon oil and liquid rubber are used to effect penetration, swelling and compatibilization of the rubber particles, following which thermal energy and mechanical energy are applied to initiate breakdown of the vulcanized structure of the rubber particles and the formation of at least partially dissociated rubber vulcanate network. Such treated rubber may be further reacted and combined for employment in the production of stabilized polymer modified bitumen composition.

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