JPS61293265A - Metallic flake pigment - Google Patents

Abstract

PURPOSE:To provide a metallic flake pigment having specific hiding power and excellent resistance to heat and corrosion and suitable for use as a pigment for metallic paint, consisting of a flaky powder composed of metallic titanium, a titanium alloy, metallic chromium or a chromium alloy. CONSTITUTION:A metallic flake pigment having hiding power of 1,000-15,000cm<2>/g comprises metallic titanium, a titanium alloy, metallic chromium or a chromium alloy. The pigment can be obtd. in the following manner. A flaky metallic powder obtd by a wet-process crushing method is classified and slurried. The slurry is subjected to solid/liquid separation. The filter cake is kneaded in a kneader or a ribbon mixer, and the metal content is adjusted to the predetermined value, thus obtaining the desired pigment. When the hiding power is outside the range defined above, it is difficult to use to pigment as one for paint.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flaky metal pigment, and ay L/< is a novel metal pigment suitable for a pigment for metallic paints.
do.

Traditionally, aluminum, magnesium and bronze.

Flake-shaped metal pigments made of metals such as nickel and stainless steel are used in construction 1, light electrical appliances, and i-machine equipment.

It is widely used as a paint for ships or automobiles, as a printing ink for paper, plastic film, etc., or as a pigment mixed into plastic boots. However, flake-like metallic pigments made of metallic chromium, which are similar to metallic titanium, are not known.

The metal pigment of the present invention is made of titanium powder, chromium powder, or alloy powder thereof.

Titanium alloy powder contains Cr and Fe as alloy components.

Powder containing 50% or less of Ni, Mo, V, Zr, Sn, AI (1!f! in D), and chromium alloy powder contains 1 of Ti, Fe, Ni, Mo, Aj as an alloy component. It is a powder containing 50% or less of seeds or more.

The metal pigment of the present invention is obtained by pulverizing flaky metal powder using a known face FIvJ manufacturing method, for example, a wet pulverization method, performing a classification operation as necessary, and then separating the slurry into solid and liquid using a filter. The resulting filter cake was
It is manufactured through a series of steps in which it is kneaded in a bomb mixer using a demixer or t to adjust the desired metal content.

Grinding equipment includes ball mills, tube mills, and vibrating ball mills.

Any one such as an attritor can be used. The grinding medium is
Use a suitable solvent containing a known lubricant.
Examples include saturated or unsaturated higher fatty acids having 8 to 1 B carbon atoms, gold 12Q salts of the fatty acids, amides of the fatty acids, aliphatic amines having 8 to 18 carbon atoms, and aliphatic alcohols having 8 to 18 carbon atoms. Can be used alone or in mixtures.

The gold 1IiW4Fl of the present invention usually carries a lubricant on its surface in an amount of about 0.01 to 10 parts by weight per 100 parts by weight of metal. However, these lubricants need to be completely removed depending on the use, and the present invention also includes metal pigments that do not substantially carry lubricants on their surfaces.

The metal pigment of the present invention is very similar to aluminum pigment in terms of shape, particle size, and particle size distribution, and is 1000 to 15.0 O
Ocd/1Jr-preferably 3000-10.0O
It has a concealing power of Qcd/Qr. Moreover, it has excellent surface properties and good metallic properties (surface gloss, flop properties, brightness).

If the hiding power is outside the above range, it will be difficult to use it as a paint pigment. For the following reasons, the metal pigment of the present invention can be directly applied to fields where aluminum l1iFl can be used, and has better heat resistance and corrosion resistance, so it can be used in a wider range of applications. Be expected.

20 parts by weight of Tomitekiueyu reagent titanium powder (passed through 350 meshes) of mineral subirizu I-, 4Q n olein Il 1 was placed in a ball mill and pulverized for 2 hours and 30 minutes. After the grinding was completed, the slurry was washed out with mineral spirits and classified using a 350 mesh screen. Then, the slurry that had passed through the 350-mesh mesh was subjected to solid-liquid separation using a pan filter to obtain an e-filtration cake containing 94% metal content. Mineral Subirit 1~ was added to this cake and kneaded for 30 minutes in a Nigu mixer to obtain a metallic titanium base with a metal content of 90 atoms. The resulting paste was found to have a similar shape and surface texture to Aluminum Base 1 (see Figure 1).

Example 2 Reagent chromium powder (passed through 250 meshes) 20 parts mineral spirit 3 parts oleic acid 1 part was ground in the same manner as in Example 1 for 3 hours, then kneaded to obtain chromium with a metal content of 90 parts. The paste was found to have a shape and surface texture similar to that of the aluminum paste (see Figure 2).

Ti-4V-6ΔI alloy powder (3
Example 1 was repeated using 50 mesh passes).

1 Seed JL4 Reagent Example 1 was repeated using Orr-3Ni alloy powder (250 mesh passage) in place of the titanium powder.

Comparative Example An acid-resistant aluminum paste (Toyo Aluminum Co., Ltd., Alpaste 08840Y F-△R) with a metal content of 64% by weight obtained by wet-pulverizing atomized powder of high-purity aluminum with F in the presence of 1 to 2 minerals was used. , was used as a comparison substance.

Tests 1 to 3 below were conducted on paints prepared from each sample powder of Example 1/4 and Comparative Example. The results are summarized in the table.

Test 1: Metallic, test 1, coating v1 of the composition described above was spray-painted on a steel plate, and 150
A coated plate with a film thickness of 30 μs was prepared by dry baking at ℃ for 10 minutes. The metallic properties of the obtained coated plates were visually judged.

Thermosetting acrylic lacquer 45 parts by weight (Kansai Paint Magikron) Kijiroll 50 parts by weight Metal powder paste (metal content equivalent) 1.2 parts by volume 2 Knees The paint with the following composition was spray-painted on a polished mild steel plate. 180
A metallic coated plate with a film thickness of 15IIR was prepared by baking at ℃ for 20 minutes. The coated plate was kept at a temperature of approximately 600°C in the furnace T.
: After heating for 48 hours, changes in the coated plate before and after heating were visually determined.

Silicone varnish (solid 9% F[) 100% by volume (Toshiba Silicone Co., Ltd., TRS 144) Metal powder paste (metal 9% R) 7.2% by volume:
On the coated plate obtained in Test 1, pre-adjusted 0,01N
One drop each of a sulfuric acid aqueous solution and a 0.0 IN caustic soda aqueous solution was gently dropped to form two circles with a diameter of about 20 m on the coated plate. After leaving the plate for 24 hours, changes in the coated plate were visually determined.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are photographs showing the particle structures of the metal powders obtained in Examples 1 and 2, respectively. /IIW person Xn Aldenium Co., Ltd. agent for patent attorney Yoshiguchi Yu Pi-Ting, 2

Claims (1)

[Claims] (1) Made of metallic titanium, titanium alloy, metallic chromium or chromium alloy, and has a hiding power of 1,000 to 15,000c.
A flaky metal pigment with m^2/gr.