C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 95/00 (2006.01) C04B 24/36 (2006.01) C04B 28/02 (2006.01) C08L 29/02 (2006.01) C08L 71/02 (2006.01)
Patent
CA 2337405
The invention concerns an aqueous bitumen emulsion, consisting of the following constituents expressed in weight percentages of the emulsion total weight: 50 % to 70 % of bitumen; 0.5 % to 10 % of surfactant; 0 % to 5 % of thickening agent; 0 % to 1 % of antifoaming agent; a sufficient quantity of water to make up 100 %. Said emulsion is characterised in that the surfactant consists of at least a surfactant selected among the group consisting of an ethylene oxide and a propylene oxide copolymer, with PO/EO ratio ranging between 1.5 and 10, an ethoxylated and/or propoxylated epoxidized surfactant, and a polyvinyl alcohol having molecular mass ranging between 10000 and 150000. The invention also concerns the method for obtaining said emulsions, the compositions containing them, and the use of said bitumen emulsions for the formulation of compositions comprising a hydraulic or organic binder, and/or a mineral or organic filler.
L'invention concerne une émulsion aqueuse de bitume, constituée des composants suivants, exprimés en pourcentages du poids total de l'émulsion: 50 % à 70 % de bitume; 0,5 % à 10 % de tensioactif; 0 à 5 % d'épaississant; 0 à 1 % d'anti-mousse; qsp 100 % d'eau; l'émulsion étant caractérisée en ce que le tensioactif est constitué d'au moins un tensioactif choisi dans le groupe consistant en un copolymère d'oxyde d'éthylène et d'oxyde de propylène, de rapport OP/OE compris entre 1,5 et 10, un tensioactif époxydé éthoxylé et/ou propoxylé, et un alcool polyvinylique de masse moléculaire comprise entre 10000 et 150000. L'invention concerne également le procédé d'obtention de telles émulsions, les compositions les contenant, ainsi que l'utilisation d'émulsions de bitume pour la formulation de compositions comprenant un liant hydraulique ou organique, et/ou une charge minérale ou organique.
Dresin Jean-Marc
Picard Nadege
Siaud Brice
Stock Claude
Lafarge
Oyen Wiggs Green & Mutala Llp
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