Water-borne zinc silicate shop primers
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United States of America Patent
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Oct 22, 2002
Grant Date -
N/A
app pub date -
May 26, 2000
filing date -
May 26, 1999
priority date (Note) -
Expired
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Abstract
The present invention relates to novel water-borne shop primer (preconstruction primer) compositions comprising 5-40% by volume of a pigment mixture; 1.4-10% by volume of one or more water soluble silicates (based on the dry volume of the silicate); 40-90% by volume of water; and optionally one or more additives; said pigment mixture comprising 40-90% by weight of zinc, 10-60% by weight of micaceous iron oxide (MIO), and 0-50% by weight of a second filler (e.g. barium sulphate, kaolin, muscovite, quartz, etc.). The present invention also provides a method of using a shop primer composition for temporary protection of a steel surface, and to a method for the manufacture of a steel construction.
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