Composition for forming hydrophilic film on aluminum

Details Composition for forming hydrophilic film on aluminum Composition for forming hydrophilic film on aluminum

C - Chemistry, Metallurgy

04

B

117/163, 257/27,

C04B 28/26 (2006.01) C23C 22/26 (2006.01) C23C 22/66 (2006.01) F28F 13/18 (2006.01)

Patent

CA 1297613

25088-67 ABSTRACT OF THE DISCLOSURE A composition for forming a hydrophilic film on aluminum comprises an alkali silicate, an inorganic hardening agent and a water-soluble organic high-molecular- weight compound. The composition is useful for aluminum fin materials for producing heat exchanger fins, aluminum products such as aluminum heat exchangers comprising fins and tubes in combination, and materials of such products. The high-molecular-weight compounds effectively prevents the alkali silicate from giving off a cement odor and also sustains over a prolonged period of time the hydrophilic properties of the film prepared from the alkali silicate and the hardening agent. The composi- tion forms hydrophilic films releasing no cement odor and retaining sustained hydrophilic properties over a long period.

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