Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1993-11-19
1996-01-30
Bell, Mark L.
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
106 1442, 106 1441, 106 1405, 106 1444, 106419, 106425, 106429, 423143, 423144, 423147, 423368, 423369, 423DIG8, C04B 1436
Patent
active
054877792
ABSTRACT:
A method of preparing a (Me)bis-hydrogen cyanamide composition with enhanced corrosion preventive activity, wherein Me is a divalent metal selected from the group consisting of nickel and cobalt or mixtures thereof. The method includes precipitating Ni(OH).sub.2 or Co(OH).sub.2 or mixtures thereof, in situ in a liquid reaction medium, containing a soluble cobalt or nickel salt and sodium hydroxide and a stoichiometric excess of H.sub.2 NCN and immediately reacting the resultant precipitate with H.sub.2 NCN. Precipitation of coprecipitated pigment compositions including the aforementioned derivatives and zinc cyanamide is also disclosed.
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Advanced Inorganic Chemistry, Cotton, F. A. et al., Interscience, 1966, pp. 605, 865.
Chem. Abs. 69:100291 of "Thermochemical Study of some metal cyanamides. I. Enthalpies of formation." in Bull. Soc. Chim. Fr. (1968), (6), 2357, Bernard, M.
Chem. Abs. 69:99876, ibid, ". . . II. Thermochemical study of hydrolysis kinetics for cyanamide in aqueous media." Bull. Soc. Chim. Fr. (1968), (6), 2359-61, Bernard, M.
"Chimie Mineral--Sur des cyanamides de nickel et de cobalt", Maurice A. Bernard and Annie Chemin, Jan. 17, 1966. (English translation also attached).
Bell Mark L.
Hertzog Scott L.
Wayne Pigment Corp.
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