Masonry treatment composition

C - Chemistry – Metallurgy – 04 – B

Patent

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Details

C04B 41/49 (2006.01) C04B 41/64 (2006.01) C09D 183/08 (2006.01)

Patent

CA 2240202

A self-emulsifying, liquid treatment composition comprises the polysiloxane reaction product of (a) at least one alkoxysilane, alkoxysiloxane, or siloxane compound comprising at least one hydrophobic moiety selected from the group consisting of alkyl, aryl, aralkyl, and alkaryl moieties; (b) at least one alkoxysilane, alkoxysiloxane, or siloxane compound comprising at least one hydrophilic moiety selected from the group consisting of protonated and unprotonated azaalkyl and silyl-containing azaalkyl moieties; and (c) at least one fluorine-containing alkoxysilane compound which is capable of reaction with component (a) and/or component (b) and which comprises at least one perfluoroalkyl group having at least four carbon atoms and optionally containing one or more catenary ether oxygen atoms. The composition can be used to render substrates, especially porous substrates (e.g., concrete, wood, or masonry), both water- and oil-repellent.

Une composition de traitement, auto-émulsifiante et liquide, comporte le produit de la réaction de polysiloxane constitué (a) d'au moins un composé d'alcoxysilane, d'alcoxysiloxane ou de siloxane comportant au moins une fraction hydrophobe choisie dans le groupe constitué par des fractions d'alkyle, d'aryle, d'aralkyle et d'alkaryle, (b) d'au moins un composé d'alcoxysilane, d'alcoxysiloxane ou de siloxane comportant au moins une fraction hydrophile choisie dans le groupe constitué par des fractions d'aza-alkyle protonées ou non contenant aza-alkyle et silyle et, (c) d'au moins un composé d'alcoxysilane, contenant du fluor, à même de réagir avec le constituant (a) et/ou le constituant (b) et qui comprend au moins un groupe perfluoroalkyle comportant au moins quatre atomes de carbone et pouvant contenir un ou plusieurs atomes en chaîne d'oxygène à fonction éther. Il est possible d'utiliser cette composition pour rendre hydrophobes et oléophobes des substrats, notamment des substrats poreux tels que le béton, le bois ou certains matériaux de maçonnerie.

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