Stock material or miscellaneous articles – Composite – Of polyamidoester
Patent
1995-05-09
1998-05-05
Merriam, Andrew E. C.
Stock material or miscellaneous articles
Composite
Of polyamidoester
428 15, 428461, 428480, 4273855, 4274071, 4274191, 524443, 524450, 524456, 524791, C09D 1700, B05D 724
Patent
active
057471681
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a process for producing a coating made of the precious stone lapis lazuli and for applying such a coating to a substrate, as well as to such a coating and to a substrate so produced.
STATE OF THE ART
It was practically not possible heretofore to carry out work such as lacquering or inlaying work with lapis lazuli. The thin cuts of lapis lazuli stone required for inlaying work are too fragile for permitting the cutting and processing of configurations.
Lapis lazuli is an aluminum silicate, the atomic lattice of which contains sulfur atoms that provide the precious stone with its characteristic blue coloration. Lapis lazuli consists of about 6 different minerals such as pyrite, among others, which, following grinding, have to be separated in order to extract the blue pigment. Extracting the pigment from the ground, crystalline precious stone is accomplished with a modern treatment process that supplies yields of the various color shades of between 3 to 10% pigment of different blue tints from the precious stone, so that after the separation process, lapis lazuli precious stone pigments are separately available in the crystalline form in different blue shades ranging from light to dark blue.
The use of larger quantities of lapis lazuli precious stone pigment was not possible until now because the old techniques supplied only an extremely low yield. However, the lapis lazuli precious stone pigment is practically irreplaceable for restorations, particularly of works from the Orient, for book illustrations, or particularly valuable refinements or artistic decorations of objects such as inlay work.
A process for producing a pasty, shapable coating for buildings, or for producing architectural motifs or tiles on the basis of liquid, transparent resins with mineral substances has become known from FR-A-1 539 718, with about up to 70% of such substances being admixed to the resin. The mineral substances specifically consist of pulverized lava, silicon, cement, carbon, mica, as well as of mother-of-pearl powder and phosphorescent and fluorescent substances, to which mineral color pigment may be admixed as well. The use of such pasty compounds serves for imitating marble or other grains or textures.
The manufacture of a compound of a color-like, reflecting coating has become known from U.S. Pat. No. 3,251,704, which coating, following drying, is present as a reflecting surface layer consisting of a mixture of transparent lacquer-containing non-volatile, film-forming vehicle materials, semispherical, reflecting microspheres of transparent glass, and nonmetallic, chemically inert, colored pigment particles in the form of organic molecule complexes (clusters) of pigment powder with a size distribution between 2 and 70 microns. Said coating compound serves for coating spherical lenses or glasses in order to produce color effects, particularly reflecting effects of the lenses or glasses.
TECHNICAL PROBLEM
The invention is based on the problem of using the precious stone lapis lazuli in the crystalline form as a ground stone in many different ways on practically any desired substrates for refining the surface of the latter.
Disclosure of the invention and its advantages
The solution to the problem lies in that crystalline lapis lazuli precious stone pigment with a grain size of between 5 and 90 microns is used and mixed with a colorless vehicle, namely self-curing or reaction-curing lacquer systems, particularly polyester, polyurethane or acrylic lacquer, or automotive lacquer in a one- or two-layer lacquering, and mixed with additional colorless lacquers, if need be-, and this mixture is applied to the substrate preferably by spraying or lacquering, and ground or polished following drying or curing on the substrate, if necessary. Subsequently, the coating can be coated with a colorless covering lacquer. Before the mixture is applied, the substrate is preferably roughed or slightly ground, and the mixture is then applied by spraying or lacquering. Preferably, the substrate is
REFERENCES:
patent: 3251704 (1966-05-01), Nellessen
patent: 3642346 (1972-02-01), Dittmar
patent: 3861990 (1975-01-01), Kasai et al.
patent: 4312855 (1982-01-01), Grand
patent: 4809417 (1989-03-01), Normann, Jr.
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