Corrosion preventive zinc cyanamide and method
AssigneeWayne Pigment Corp.
InventorJohn Sinko
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Abstract
Improved corrosion preventive pigment grade zinc cyanamide suitable for protective coatings is prepared by providing a hydrated slurry of finely divided, dispersed basic zinc carbonate, mixing with said slurry a stabilized soluble aqueous solution of hydrogen cyanamide to form zinc cyanamide having a crystalline structure characterized by the presence of an intense IR absorption spectral band at 2200 cm.sup.-1 and the substantial absence of component bands at 2050 cm.sup.-1 and 700 cm.sup.-1.
Claims11
A pigment grade zinc cyanamide having enhanced corrosion preventive activity formed by a process comprising
- providing a hydrated slurry of finely divided, dispersed basic zinc carbonate,
- mixing with said slurry a stabilized aqueous solution of hydrogen cyanamide,
- said zinc cyanamide having a crystalline structure characterized by the presence of an intense IR absorption spectral band at 2200 cm.sup.-1 and the substantial absence of component bands at 2050 cm.sup.-1 and 700 cm.sup.-1.
Pigment grade open textured composition, having enhanced corrosion inhibitive activity, formed by a process comprising
- providing a hydrated aqueous slurry of finely divided, dispersed basic zinc carbonate,
- mixing with said slurry a stabilized aqueous solution of hydrogen cyanamide,
- said composition containing zinc cyanamide as major constituent of approximately 70-95 weight percent intimately associated with zinc carbonate as secondary constituent of approximately 1-10 weight percent.
A pigment grade open textured, porous zinc cyanamide having enhanced corrosion preventive activity substantially free of soluble inorganic salts having a crystalline structure characterized by the presence of an intense IR absorption spectral band at approximately 2200 cm.sup.-1 and the substantial absence of spectral bands at approximately 2050 cm.sup.-1 and approximately 700 cm.sup.-1.
A method of producing pigment grade zinc cyanamide having enhanced corrosion preventive activity comprising
- providing a hydrated slurry of finely divided, dispersed basic zinc carbonate,
- mixing with said slurry a stabilized soluble aqueous solution of hydrogen cyanamide and reacting said ingredients to form zinc cyanamide having a crystalline structure characterized by the presence of an intense IR absorption spectral band at 2200 cm.sup.-1 and the substantial absence of approximately component bands at approximately 2050 cm.sup.-1 and 700 cm.sup.-1.
Dependencies are inferred from the claim text.