C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/1602
C08L 95/00 (2006.01) C08L 75/04 (2006.01) C08L 75/14 (2006.01)
Patent
CA 1280835
Process for the preparation of an aqueous emulsion composition of bitumen-polyurethane A B S T R A C T The process according to the invention is characterized by the following stages: (A) an emulsion of bituminous composition is made starting from (a) a bituminous composition prepared by adding, at a temperature of 100 to 150°C, 20 to 95 parts of bitumen to 5 to 80 parts by weight of a poly- urethane extender and from (b) an aqueous phase obtained by solution in water of 1 to 20% by weight of an emulsifier chosen from a polyamine hydrochloride, an amido-amine hydrochloride and a quaternary ammonium salt, then the bituminous composition (a), taken to a temperature of 120 to 150°C, is emulsified with the aqueous phase (b), taken to a temperature of 40 to 80°C; (8) a polyisocyanate aqueous emulsion is made by mixing, under strong agitation, 20 to 50 parts by weight of an organic polyisocyanate made up to 100 parts with water; and (C) the emulsions (A) and (B) are mixed. They then form, by reticulation at ambient temperature, a polyurethane in the mixture. Use cold in paints, coatings, grouts and surfacings.
518743
Lalanne Marie-Florence
Serfass Jean-Pierre
S. C. R. E. G. Routes Et Travaux Publics
Swabey Ogilvy Renault
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