Purple pigments, a process for their production and use thereof

Details Purple pigments, a process for their production and use thereof Purple pigments, a process for their production and use thereof

1992-02-28

1993-10-12

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 32, 106403, 427214, 427217, C03C 818

Patent

active

052525228

ABSTRACT:
Purple pigments based on glass frits having an average particle diameter (D.sub.50 value) of 0.5 to 50 .mu.m, of which the surface has a coating of essentially 0.05 to 5% by weight, based on the pigment, of colloidal gold and, if desired, color-modifying metals from the group consisting of Ag, Cu, Co, Ni, Sn, Ru, Rh, Pd, Os, Ir and Pt in a total quantity below that of the gold. The purple pigments do not require the hitherto necessary calcination step and can be used for pigmenting glazes, enamels, glass colors, decorative colors, plastics, printing inks and lacquers.

REFERENCES:
Patent Abstracts of Japan, vol. 5, No. 35 (C-46) Mar. 5, 1981 & JP-A-55 160 061 (Showa Highpolymer Co.) Dec. 12, 1980.
World Patent Index Latest Derwent Publ. Ltd, Londong, GB Accession No. 89-291098, Week 40 & JP-A-012156865 (Miyoshi Kasei) Aug. 29, 1989.
World Patents Index Latest Derwent Publ. Ltd, London, GB Accession No. 91-146218, Week 20, & JP-A-03084066 (Toray Ind.) Apr. 9, 1991.
World Patents Index Latest Derwent Publ. Ltd, London, GB Acession No. 81-12921D, Week 8, & JP-A-55162473 (Showa High Polymer) Dec. 18, 1980.

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