Curable coating compositions for metal substrates

Details Curable coating compositions for metal substrates Curable coating compositions for metal substrates

B - Operations, Transporting

32

B

B32B 15/04 (2006.01) C04B 12/04 (2006.01) C04B 28/26 (2006.01) C04B 41/50 (2006.01) C09D 1/02 (2006.01) C23C 26/00 (2006.01) C23C 30/00 (2006.01) H01B 3/02 (2006.01)

Patent

CA 2468405

An aqueous, curable coating composition comprising a mixture of: (a) at least one water-soluble alkali metal silicate and (b) an effective amount of a water- soluble crosslinking agent comprising an alkali metal aluminophosphate, or an alkali metal aluminoborophosphate, or an ammonia aluminophosphate, or an ammonia aluminoborophosphate, or an alkali metal ammonia aluminophosphate, an alkali metal ammonia aluminoborophosphate, or a mixture of two or more of the foregoing phosphates. The coating composition will often not contain any visually discernible precipitate. The coating composition may be applied to a substrate, such as a glass, a ceramic, concrete or a metal and thereafter cured by air drying or by heating to a temperature of up to about 240~C (or higher, if desired).

L'invention concerne une composition de revêtement durcissable aqueuse comprenant un mélange (a) d'au moins un silicate de métal alcalin soluble dans l'eau et (b) d'une quantité efficace d'un agent de réticulation soluble dans l'eau comprenant un aluminophosphate de métal alcalin, un aluminoborophosphate de métal alcalin, un aluminophosphate d'ammoniac, un aluminoborophosphate d'ammoniac, un aluminophosphate d'ammoniac de métal alcalin, un aluminoborophosphate d'ammoniac de métal alcalin ou un mélange de deux au moins des phosphates susmentionnés. Habituellement, cette composition de revêtement ne contient pas de précipité perceptible visuellement. Ladite composition peut être appliquée sur un substrat, tel qu'un substrat de verre, de céramique, de béton ou de métal, puis durcie par séchage à l'air ou par chauffage à une température pouvant atteindre environ 240 ·C (voire plus, si nécessaire).

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