Compositions: coating or plastic – Coating or plastic compositions – Carbohydrate or derivative containing
Patent
1980-06-06
1982-03-09
McCarthy, Helen M.
Compositions: coating or plastic
Coating or plastic compositions
Carbohydrate or derivative containing
106308F, 106308N, 106309, 241 15, 241 16, 241 22, B02C 1500, C09C 162
Patent
active
043187471
ABSTRACT:
Novel metal flake pigments suitable for use in coating compositions, which have a good filtration property and good dispersion stability, and which produce coatings having good specular gloss, sharpness of image and hiding power, are presented. These metal flake powders contain metal flakes, between which no substantial aggregation is formed and which have a specific surface area, determined by a BET method, of 65 through 250 m.sup.2 /cm.sup.3, and have such a particle size distribution that at least 99.5% of the flakes pass through a screen having an opening size of 20 microns and at least 90% of the flakes pass through a screen having an opening size of 5 microns. These metal flakes are produced by wet milling small metal pieces or particulates in the presence of a milling aid, including higher fatty acids and the derivatives thereof, in an amount sufficient to cover the surfaces of the metal flakes in a bi-molecule layer.
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Gardam, G. E. et al., "Properties and Use of Aluminum Paste Pigment in Organic Finishes"-Trans. of Inst. of Metal Finishing, vol. 37, 1960, pp. 52-55.
Imasato Yasunobu
Ishijima Shizuo
Asahi Kasei Kogyo Kabushiki Kaisha
McCarthy Helen M.
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