Anti-corrosive paint
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United States of America Patent
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Feb 26, 1985
Grant Date -
N/A
app pub date -
May 31, 1983
filing date -
Jun 1, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An anti-corrosive coating composition includes as an anti-corrosive pigment dispersed in a film-forming binder a salt of a polyvalent metal cation and an organic polyphosphonic acid containing at least 2 phosphonic acid groups. The ratio of polyvalent metal cations to phosphonate groups in the salt is at least 0.8/n:1, where n is the valency of the polyvalent metal ion.
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