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    • 44. 发明专利
    • ANTICORROSIVE FOR METAL
    • JPS63105984A
    • 1988-05-11
    • JP24952486
    • 1986-10-22
    • NIPPON CATALYTIC CHEM IND
    • KOBAYASHI HIROYATSUBAKIMOTO TSUNEOMIYAKE KOJI
    • C23F11/173
    • PURPOSE:To improve the biodegradation resistance, the corrosion preventing performance in a highly concd. state and the compatibility with chemicals such as multivalent metallic salts by copolymerizing a mixture of acrylic ester, unsatd. sulfonic acid and unsatd. carboxylic acid monomers each represented by a specified general formula in a specified mixing ratio. CONSTITUTION:A (meth)acrylic ester monomer (A) represented by formula I is mixed with an unsatd. sulfonic acid monomer (B) represented by formula II, an unsatd. carboxylic acid monomer (C) represented by formula III, and other polymerizable monomer (D) in (0.2-40):(10-85):(10-85):(0-40) molar ratio of A:B:C:D. In the formulae I-III, each of R and R is H or CH3, each of R and R is 2-4C alkylene, R is H, 1-5C alkyl, phenyl, alkylphenyl having one to three 1-9C alkyl groups as substituents or benzyl, n=1-100 on the average, Z is O or NH, each of M and M is H, an alkali metal, an alkaline earth metal, NH4 or an amine salt, R is H, CH3 or COOM and R is H, CH3 or CH2COOM . The monomer mixture is copolymerized and the resulting water soluble copolymer is added to an anticorrosive.