C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 201/00 (2006.01) C09D 5/08 (2006.01) C09D 7/12 (2006.01) C23F 11/00 (2006.01)
Patent
CA 2587714
It is an object of the present invention to provide an anticorrosive coating composition which uses a pollution-free (heavy metal-free) rust preventive pigment and exhibits anticorrosive performances equal or superior to those of lead compounds or chromic acid compounds even if the pigment is blended in various binder resins and also to provide an anticorrosive coating composition having excellent storage stability. The present invention relates to an anticorrosive coating composition comprising a binder resin and a pollution-free (heavy metal-free) rust preventive pigment containing a condensed calcium phosphate produced by baking a single substance or mixture of a calcium component and a phosphorous component in the following atomic ratio (Ca/P = m): 0.50 < m< 1.00, at 180 to 350°C.
L~invention concerne une composition de revêtement anticorrosif contenant un pigment anticorrosif non polluant ne contenant pas de métaux lourds et qui, même si elle contient le pigment et n~importe laquelle de diverses résines liantes, possède des performances anticorrosives supérieures ou égales à celles des compositions de revêtement anticorrosif contenant un composé de plomb ou un composé d~acide chromique. Elle porte également sur une composition de revêtement anticorrosif à l~excellente stabilité de stockage. Les compositions de revêtement anticorrosif sont caractérisées en ce qu~elles comprennent : un pigment anticorrosif non polluant ne contenant pas de métaux lourds et contenant du polyphosphate de calcium obtenu par cuisson à 180-350°C d~une simple substance ou d~un mélange comprenant un ingrédient de calcium et un ingrédient de phosphore, le rapport atomique calcium/phosphore dans les deux ingrédients (Ca/P=m) étant compris entre 0,50 et 1,00 ; et une résine liante.
Matsuda Takashi
Matsumoto Tsuyoshi
Nagai Masanori
Ogawa Osamu
Dai Nippon Toryo Co. Ltd.
Smart & Biggar
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