Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1989-12-01
1990-09-25
Niebling, John F.
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
428622, 428626, 428624, 428632, 428659, 428684, 2041811, 2041814, 2041817, B32B 1504, B32B 1508, C25D 1306, C25D 1320
Patent
active
049592777
ABSTRACT:
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 amono 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.sup.2, and then heat-drying the same.
REFERENCES:
patent: 4775600 (1988-10-01), Adaniya
patent: 4876160 (1989-10-01), Shindou
patent: 4889775 (1989-12-01), Adaniya
Honda Takumi
Iizuka Haruo
Nishihara Akira
Ogino Takao
Okita Hiroshi
Hsing Ben C.
Mitsubishi Kasei Corporation
Niebling John F.
Nihon Parkerizing Co. Ltd.
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