A water-borne polysiloxane/polysilicate binder

Details A water-borne polysiloxane/polysilicate binder A water-borne polysiloxane/polysilicate binder

C - Chemistry, Metallurgy

08

L

C08L 83/02 (2006.01) C04B 12/04 (2006.01) C04B 28/26 (2006.01) C09D 1/04 (2006.01) C09D 4/00 (2006.01) C09D 183/02 (2006.01) C09D 183/08 (2006.01)

Patent

CA 2171959

A protective coating is made by polymerizing in water an amino oxysilane having at least one primary amine group to control pH and water solubility, the amino oxysilane comprising a saturated or unsaturated hydrocarbon group containing up to 12 carbon atoms, and having multiple hydrolyzable side groups selected from the group consisting of alkyl, aryl, alkaryl, alkoxy and alkoxyalkyl groups having from 1 to 6 carbon atoms, where the number of repeating units of the oxysilane is in the range of from 1 to 3, and metal silicates comprising a cation from the group consisting of alkali metals and alkaline-earth metals, the metal silicate having multiple hydroxy side groups to facilitate polymerization.

On produit un revêtement protecteur en polymérisant, dans de l'eau, un amino oxysilane dans lequel au moins un premier groupe amine régule le pH et la solubilité dans l'eau, cet amino oxysilane comprenant un groupe hydrocarbure saturé ou non saturé qui contient jusqu'à 12 atomes de carbone, et plusieurs groupes latéraux hydrolysables sélectionnés dans le groupe formé par les groupes alkyle, aryle, alcaryle, alcoxy et alcoxyalkyle contenant entre 1 et 6 atomes de carbone, le nombre d'unités répétitives de l'oxysilane étant compris entre 1 et 3; et des silicates métalliques comprenant un cation issu du groupe constitué par les métaux alcalins et les métaux alcalino-terreux, le silicate métallique comprenant plusieurs groupes latéraux hydroxy pour faciliter la polymérisation.

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