Water repellent for automobile window glasses

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 3/18 (2006.01) C03C 17/30 (2006.01)

Patent

CA 2263683

A water repellent for automobile window glasses capable of protecting the windows from being wetted with rainwater to secure a good visibility even when the automobile is running at a speed of as low as below about 50 km/hr in the rain. The repellent comprises an alkylpolysiloxane, an acidity regulator, an aqueous solvent and at least one of three components, i.e. an alkylpolyorganosiloxane of general formulae (1), (2) or (3) (wherein X1, X2 and X3 each represents a long-chain alkyl group), a fluororesin of general formulae (4) or (5), and a paraffin wax.

La présente invention concerne un hydrofuge destiné aux vitres de voitures et capable de protéger les vitres contre l'humidité de la pluie, assurant ainsi une bonne visibilité au conducteur même si la voiture roule sous la pluie à une vitesse aussi basse qu'en dessous de 50 km/h environ. L'hydrofuge comprend un alkylpolysiloxane, un régulateur d'acidité, un solvant aqueux et au moins un composant parmi trois autres, c.à.d, un alkylpolyorganosiloxane dont la formule générale est la suivante (1), (2) ou (3) (dans laquelle X¿1?, X¿2? ou X¿3? représentent chacun un groupe alkyle ayant une longue chaîne), une fluororésine dont la formule générale est (4) ou (5), et une cire paraffinique.

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