| 摘要 |
PROBLEM TO BE SOLVED: To provide an organosiloxane corrosionproof coating exhibiting good adhesion to the ground by incorporating a pollution-free rust-preventive pigment which contains no heavy metals and exhibits corrosionproof performances equal or superior to those of lead compounds or chromic acid compounds. SOLUTION: The organosiloxane corrosionproof coating composition comprises the pollution-free rust-preventive pigment, which contains calcium condensed phosphate obtained by firing at 180-350°C a single compound or a mixture comprising a calcium component and a phosphorus component with a calcium to phosphorus atomic ratio (Ca/P=m) in the both components of 0.50<m<1.00 and no heavy metals, a partial hydrolyzate condensate (A) of an organosilane represented by general formula: R<SP>1</SP><SB>n</SB>Si(OR<SP>2</SP>)<SB>4-n</SB>[wherein R<SP>1</SP>is a 1-8C organic group; R<SP>2</SP>is a 1-6C alkyl group; and n is an integer of 0-2], and a curing catalyst (B). COPYRIGHT: (C)2006,JPO&NCIPI
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