Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1991-05-03
1992-03-24
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523442, 523443, 524492, 524493, C08K 708, C08K 710
Patent
active
050989383
ABSTRACT:
A coating composition for the protection of substrates against environmental attack comprising, in weight percent based on the solvent-free weight of the composition, from about 8% to about 35% of at least one film forming polymer; from 0 to about 60% of a corrosion inhibiting agent such as metal chromates, metal phosphates, metal molybdates, particulate metallic zinc and/or particulate metallic aluminum; from 3% to about 6% of mixture of pyrogenic amorphous silicas of different particle sizes having average particle sizes ranging from about 0.007 to about 0.04 micron; from about 15% to about 55% of at least one crystalline silica having an oil absorption value of less than 20 measured by ASTM Standard Test D281-84; and 0 to 35% based on the total weight of the composition, of at least one solvent compatible with the polymer. The compositions can be prepared in organic solvent-based, water-based, or solvent-free powder forms, and have utility as primer coatings for aircraft and aerospace vehicles, and for protection of metallic substrates against corrosion.
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Delmendo R. H.
Schofer Joseph L.
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