Pavement rejuvenator and dressing conditioner emulsions and...

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 195/00 (2006.01) C08L 95/00 (2006.01) C09D 7/02 (2006.01) E01C 7/35 (2006.01)

Patent

CA 2219297

A pavement rejuvenating and/or conditioning composition in the form of an aqueous-based emulsion or jelly. More particularly, bituminous pavement rejuvenators and pavement dressing conditioners are made into emulsions or jellies by agitating the rejuvenators and/or conditioners in cationically- or anionically-modified aqueous solvents. These solvents include aqueous polyvinylalcohol; aqueous amines; aqueous compounded amines such as those available from Akzo Chemicals and sold under the tradename Redicote (i.e., Redicote E-9) or those available from B.F. Goodrich Chemical Co. and sold under the tradename Carbopol; and aqueous solutions of aliphatic fatty acids and caustic (usually sodium hydroxide). When the emulsifying agent concentration in the solution is increased, the solution may be used to form jellied products, whereas more dilute aqueous solutions of the emulsifying agents are suitable for preparing lower viscosity emulsions of the rejuvenating and conditioning compositions.

L'invention concerne une composition de régénération et/ou d'amélioration de chaussées sous forme d'émulsion ou de gelée à base aqueuse. Plus particulièrement, des régénérateurs bitumineux et des améliorants de remodelage de chaussées sont mis en émulsions ou en gelées par agitation dans des solvants aqueux ayant subi une modification cationique ou anionique. Ces solvants renferment de l'alcool polyvinylique aqueux; des amines aqueuses; des amines combinées aqueuses telles que celles commercialisées par Akzo Chemicals et vendues sous la dénomination commerciale Redicote (c'est-à-dire Redicote E-9) ou bien celles commercialisées par B.F. Goodrich Chemical Co. et vendues sous la dénomination commerciale Carbopol; et des solutions aqueuses d'acides gras aliphatiques et un caustique (généralement de la soude caustique). Lorsque la concentration en agents émulsifiants dans la solution est accrue, la solution peut être utilisée pour former des produits gélifiés, tandis que des solutions aqueuses plus diluées des agents émulsifiants conviennent pour préparer des émulsions à viscosité plus faible des compositions de régénération et d'amélioration.

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