| 摘要 |
PURPOSE:The titled composition causing no crack even in large film thickness (200-300mu) without damaging appearance of film of coating, corrosion resistance, coating workability, pot life, etc., comprising a silicic ester condensate, zinc powder and calcium metasilicate as main components. CONSTITUTION:The aimed composition comprising (A) a silicic ester condensate [preferably tetraalkyl orthosilicate shown by formula shown by formula (R is 1-8C alkyl; n is >=0) (B) preferably 50-92wt% (in a ratio based on total solid content blended) zinc powder (one having 3-15mu particle diameter) and (C) preferably 1-30wt% calcium metasilicate (CaSiO3) (preferably needle-like or long column or fibrous crystal having >=99wt% component passing through 100 mesh sieve) as main components.
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