Ambient temperature curing coating composition

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 183/04 (2006.01) C09D 143/04 (2006.01) C09D 183/06 (2006.01) C09D 201/10 (2006.01)

Patent

CA 2413465

Ambient temperature curing coating composition comprising a polysiloxane having the formula (I): wherein each R1 is selected from the group consisting of alkyl, aryl, and alkoxy groups having up to six carbon atoms, reactive glycidoxy groups, and OSi(OR3)3 groups, wherein each R3 independently has the same meaning as R1, each R2 is selected from the group consisting of hydrogen and alkyl and aryl groups having up to six carbon atoms, and wherein n is selected so that the molecular weight of the polysiloxanes is in the range of from 500 to about 2,000, and alkoxysilyl-functional acrylic polymer, and a curing catalyst. The invention further relates to the preparation of an alkoxysilyl-functional acrylic.

L'invention concerne une composition de revêtement durcissant à la température ambiante, qui comprend un polysiloxane correspondant à la formule (I), dans laquelle chaque R1 est sélectionné dans le groupe comprenant les groupes alkyle, aryle et alcoxy possédant jusqu'à 6 atomes de carbone, les groupes glycidoxy réactifs et les groupes OSi(OR3)¿3?, où chaque R3 a indépendamment la même signification que R1, chaque R2 est sélectionné dans le groupe comprenant les groupes hydrogène, alkyle et aryle possédant jusqu'à 6 atomes de carbone, n étant sélectionné de telle sorte que le poids moléculaire des polysiloxanes soit compris dans la plage allant de 500 à environ 2000. Ladite composition comprend également un polymère acrylique à fonction alcoxysilyle et un catalyseur de durcissement. L'invention concerne en outre la préparation d'un polymère acrylique à fonction alcoxysilyle.

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