发明名称 |
Process for treating plated steel sheet. |
摘要 |
<p>The present invention relates to a process for surface treatment for cathodic electrodeposit coating of a zinc-plated or zinc alloy-plated steel sheet comprising coating and drying a protective coating material on said steel sheet chromate-treated beforehand, to form a protective film before subjecting the sheet to the cathodic electrodeposit coating, which comprises coating a protective coating material having as a principal constituent of film-forming organic component a block isocyanate-containing prepolymer containing in one and the same molecule respectively at least one blocked isocyanate group, hydroxyl group, and tertiary amino group and containing 10 - 100 parts by weight of silica sol relative to 100 parts by weight of said prepolymer, in an amount of 0.3 g - 4 g/m<2>, and then heat-drying the same.</p> |
申请公布号 |
EP0372957(A2) |
申请公布日期 |
1990.06.13 |
申请号 |
EP19890312760 |
申请日期 |
1989.12.07 |
申请人 |
NIHON PARKERIZING CO., LTD.;MITSUBISHI KASEI CORPORATION |
发明人 |
SAEKI, KENSHI;OGINO, TAKAO;YOSHITAKE, NORIAKI;HONDA, TAKUMI;NISHIHARA, AKIRA;OKITA, HIROSHI;TSUGE, YUKIO;IIZUKA, HARUO |
分类号 |
C09D5/44;C08G18/10;C08G18/64;C08K3/36;C09D175/00;C09D175/04;C09D175/12 |
主分类号 |
C09D5/44 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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