Preparation of bitumen/polymer compositions, and use in...

Details Preparation of bitumen/polymer compositions, and use in... Preparation of bitumen/polymer compositions, and use in...

C - Chemistry, Metallurgy

08

L

C08L 95/00 (2006.01) C08K 3/06 (2006.01) C08K 3/24 (2006.01) C08L 9/06 (2006.01) C08L 25/10 (2006.01) C08L 53/02 (2006.01)

Patent

CA 2165460

Bitumen/polymer compositions with a broadened plasticity range are produced by stirring together a bitumen or bitumen mixture and a sulphur-cross-linkable elastomer as well as a sulphur-donating coupling agent at 100-230 ~C to give a cross-linked bitumen/polymer composition, stirring an acid or acid anhydride inorganic admixture into said composition at 100-230 ~C, maintaining the resulting reaction medium at 100-230 ~C while stirring for at least 20 minutes. Such bitumen/polymer compositions may be used directly or in dilute form to provide bituminous binders for road surfaces, coated materials and sealing coatings.

Des compositions bitume/polymère à intervalle de plasticité élargi sont produites en mettant en contact, entre 100 °C et 230 °C et sous agitation, un bitume ou mélange de bitumes avec un élastomère réticulable au soufre et un agent de couplage donneur de soufre pour produire une composition bitume/polymère réticulée, puis en incorporant à ladite composition, maintenue entre 100 °C et 230 °C et sous agitation, un adjuvant minéral du type acide ou anhydride d'acide et en maintenant le milieu réactionnel obtenu entre 100 °C et 230 °C et sous agitation pendant au moins 20 minutes. Ces compositions bitume/polymère sont utilisables, directement ou après dilution, pour former des liants bitumineux pour la réalisation de revêtements superficiels routiers, d'enrobés et de revêtements d'étanchéité.

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