JPH0765014B2 - Organic platinum ink - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an organic platinum ink used for surface decoration of ceramic products, electronic industry, and the like.

(Prior art and its problems) It has been widely practiced in the past to double the decorative effect by drawing letters and figures using ink on the surface of ceramic products such as pottery and glass products. At the time of drawing the characters or figures, not only ink but also organic sonoble metal ink having noble metal luster such as gold or silver is used to form so-called gold characters and the like to create a higher-class atmosphere. .

Of these organic precious metal inks, the platinum source that is commonly used as an ink containing platinum as a precious metal is
Although the main component is a compound of balsam sulfide and platinum called "hydroplatinum", the details of the platinum compound are unknown and have not been mass-produced. Further, since the water platinum has a low viscosity, it has poor printability and can be applied with a brush or a brush, but it cannot be used for ordinary screen printing.

(Object of the Invention) The present invention makes it possible to mass-produce by clarifying the platinum source by using a platinum compound having a higher viscosity in place of hydroplatinum conventionally used as a platinum source of an organic platinum ink. An object of the present invention is to provide an organic platinum ink having an improved printability by adding an organic binder.

(Means for Solving Problems) The present invention is an organic platinum ink containing platinum pinene mercaptide, at least one metal salt of a resin acid, an organic binder, and a solvent.

The present invention will be described in more detail below.

Platinum pinene mercaptide in the present invention is a solution of α- or β-pinene and dilute sulfuric acid (for example 32%), α- or β-pinene mercaptan prepared by adding hydrogen chloroplatinic acid or its. It is a platinum compound produced by reacting a salt, that is, platinum α-pinene mercaptide or platinum β-pinene mercaptide, and the platinum content in the platinum compound is usually about 20 to 30% by weight.

Metal salts of resin acids have been conventionally used, including noble metal salts such as gold salts, platinum salts, silver salts, palladium salts, rhodium salts and ruthenium salts, and base metal salts such as bismuth salts and chromium salts. One or more metal salts of resin acids are used.

As the organic binder in the present invention, in addition to those conventionally used, alkyd resins, urea resins, rosin derivatives, terpene resins and the like can be used. Examples of the alkyd resin that can be used include linseed oil and rosin-modified alkyd resin, and examples of the urea resin include n-butyl ether type butylated urea resin. Further, the rosin derivative resin is a generic term for substances obtained from the natural rosin obtained by chemically treating the natural rosin to have a viscosity higher than that of the natural rosin. For example, glycerin ester of rosin, pentaerythritol ester of rosin, hydrogenated Examples include rosin methyl ester and maleic acid-modified rosin ester. Further, a terpene polymer, an α-pinene polymer or the like can be used as the terpene resin.

Further, in the present invention, in addition to the platinum pinene mercaptide, the metal salt of the resin acid and the organic binder, a solvent of these components, for example, a terpene alcohol is contained as an essential component. The solvent is preferably a volatile substance which dissolves the above substance and is dried in a relatively short time when the ink containing the substance is applied to a pottery or the like.

The organic platinum ink in the present invention can contain additives such as camphor and asphalt in addition to the essential components of the platinum pinene mercaptide, the metal salt of the resin acid, the organic binder and the solvent.

Hereinafter, examples of the organic platinum ink according to the present invention will be described, but the examples do not limit the present invention.

(Example) The following components were mixed to prepare an organic platinum ink.

Platinum α-pinene mercaptide …… 7.0% by weight Rhodium resinate …… 0.05% by weight Bismuth resinate …… 0.4% by weight Chromium resinate …… 0.05% by weight Natural rosin …… 25% by weight Rosin derivative resin …… 5.0% by weight Terpene resin: 7.0% by weight Camphor: 6.5% by weight Asphalt: 1.0% by weight Benzyl acetate: 8.0% by weight Terpene alcohol: The balance.

The ink having an appropriate viscosity was applied to a surface of a ceramic or glass by using a brush or screen printing, and heated at 500 to 900 ° C. for 10 to 30 minutes to be baked.

On the other hand, 7.0% by weight of platinum α-pinene mercaptide is added to 7.0% of water platinum.
An organoplatinum ink having the same composition as described above except that it was replaced by weight% was applied on a pottery under the same conditions.

The ink of the example uniformly adhered to the entire applied portion of the pottery surface to form a smooth surface, but the ink using hydroplatinum was incompatible with the screen printability.

(Effect of the Invention) In the organoplatinum ink of the present invention, in place of hydroplatinum which has a low viscosity and whose component has not been specified, a highly viscous platinum pinene mercaptide is used, and an organic binder is used in combination to increase the viscosity. Since it has been improved, the organic platinum ink of the present invention can be mass-produced by chemically synthesizing a specific component, and is further sufficient for ordinary printing such as screen printing and application with a brush or a brush. The ink has various viscosities, and the performance as an organic platinum ink for decoration and electronic industry is dramatically improved.

Claims (3)

[Claims] 1. An organic platinum ink containing platinum pinene mercaptide, at least one metal salt of a resin acid, an organic binder and a solvent. 2. The organic platinum ink according to claim 1, wherein the platinum pinene mercaptide is platinum α-pinene mercaptide or platinum β-pinene mercaptide. 3. The organic compound according to claim 1 or 2, wherein the organic binder is a binder selected from the group consisting of alkyd resins, urea resins, rosin derivatives, terpene resins and acrylic resins. Platinum ink.