JPH03243665A - Coloring blending material - Google Patents

Abstract

PURPOSE:To obtain the subject nontoxic blending material, dyeable to a color tone unique to that of a noble metal colloid and excellent in durability such as no discoloring by dyeing the blending material with a dispersed aqueous solution of the noble metal colloid coated with a surfactant, etc. CONSTITUTION:The objective blending material obtained by dyeing thereof with a dispersed aqueous solution of a noble metal colloid (e.g. gold, silver, platinum, palladium or rhodium having preferably 30-300 Angstrom particle diameter) coated with a surfactant and/or water-soluble polymer (e.g. animal gelatin, vegetable starch, PVA or polyacrylamide).

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a colored compounding material used as a compounding material for rubber or plastics.

[Prior Art] General zero-coat rubbers and plastics mixed with compounding materials are put into practical use. This compounding material uses inorganic fine powder such as silica, carbon, calcium carbonate, iron oxide, titanium oxide, etc. or organic fine powder such as silicone resin, acrylic resin, urethane resin, silk powder, etc.

These compounds give rubber and plastics moldability, mechanical strength, texture, and color design.
In particular, when coloring is intended, dyes and coloring pigments are used in combination.

[Problem to be solved by the invention]

Conventionally, compounding materials used for rubber and plastics have monotonous colors, and for example, when applying color to improve design, it is necessary to use the compounding material and dyes or pigments together. Therefore, not only is the processing process complicated, but there are also disadvantages such as problems with uniformity such as color separation.

Therefore, the technical object of the present invention is to obtain a coloring compound that is a compound and at the same time exhibits a vivid color.

[Means to solve problems]

The present invention uses a dispersion aqueous solution of a noble metal colloid that is uniformly dispersed in water and exhibits a color tone unique to the noble metal by coating ultrafine noble metal particles (30 to 300 particles) with a surfactant and/or a water-soluble polymer. This is a colored compound material characterized by dyeing the powder particles of various compound materials.

[For production]

First, the most important point in the present invention is that as a compounding material,
When using a colored compound dyed with a surfactant or a water-soluble polymer, or a noble metal colloid coated with a surfactant and a water-soluble polymer, the moldability, mechanical strength, Furthermore, it is possible to color with the vivid color tone unique to noble metal colloids.

Furthermore, since each noble metal colloid exhibits a unique color tone depending on the type of noble metal, it is now possible to paint in a variety of colors by selecting the type of noble metal colloid.

Although the dyeing mechanism of the coloring compound according to the present invention is not yet clear, the present inventor has discovered that the precious metal colloid contains ultrafine particles (30~
300 people), and if the particles are coated with a surfactant or a water-soluble polymer, they can be homogeneously and well dispersed in water. It is thought that dyeing is caused by strong adsorption due to electrostatic bonding or van der Waalska caused by the charge and the charge of the compounding material.

Next, various conditions for implementing the present invention will be described.

The colored formulation according to the invention is obtained by dyeing formulation particles with an aqueous dispersion of a noble metal colloid coated with a surfactant and/or a water-soluble polymer.

The noble metal colloid that is the dye in the present invention is a colloid with a particle size of 30 to 300 that is coated with a surfactant and/or a water-soluble polymer and dispersed in an aqueous solution, and the noble metals include gold, silver, and platinum. , palladium and rhodium are used. As the surfactant, a cationic, anionic or nonionic surfactant is used.

Examples of water-soluble polymers include natural polymers such as animal gelatin and vegetable starch, vinyl-based polymers such as polyvinyl alcohol and polyvinylpyrrolidone, single-composition synthetic polymers such as acrylic-based polymers such as polyacrylamide and polyacrylic acid, and block polymers. Semi-synthetic polymers such as polymers, starch derivatives, and cellulose derivatives are used.

The material to be dyed is not particularly limited as long as it is a powder that is insoluble or poorly soluble in water, and inorganic materials include silica, glass, clay, zeolite, alumina, calcium carbonate, iron oxide, titanium oxide, etc. The organic material can be natural polymers such as silk powder or cellulose powder, or synthetic polymers such as silicone resin, acrylic resin, or urethane resin.

The concentration of the noble metal colloid in the dispersion aqueous solution in the present invention is:
It can be selected and determined depending on the desired dyeing density of the coloring compound.

In other words, if a liquid with a high concentration of the colloid is used, the colored compound will have a dark tone, and if a liquid with a low concentration of the colloid is used, a pale color will be obtained. Normally, the noble metal colloid concentration is 0.
．． A solution of 1 to 5 smol/l can be used.

〔Example〕

Next, the present invention will be explained with reference to Examples.

Example 1 Silica gel (with an average particle diameter of 16 μm) was added to 20 d of an aqueous dispersion solution coated with a cationic surfactant and having an average particle diameter of 40 μm and had a concentration of 0.5 s mol/l. Immerse 6g of product name: Nip Seal VN3, Manufacturer: Nippon Silikani Industry ■).

Next, after stirring slowly for 1 hour in a constant temperature bath at 80° C., the mixture is allowed to stand at room temperature and the supernatant liquid is discarded.

The supernatant liquid at this time was colorless and transparent.

Furthermore, it was dried for 12 hours in a constant temperature bath at 80°C, and then for 2 hours in a constant temperature bath at 120°C to obtain a colored silica gel. The obtained silica gel was uniformly and evenly dyed in a light purple color.

A dye dissolution acceleration test was conducted on the product using water or ethanol, and the results showed that there was no change in color tone and the product was excellent in durability.

That is, when the product was immersed in water and stirred with a magnetic stirrer for 24 hours, no discoloration of the silica gel was observed. Furthermore, no discoloration was observed even when stirring was performed using ethanol instead of water.

Examples 2 to 7 Tests were carried out under the same conditions as in Example 1, except that the type of noble metal colloid, concentration, and dyeing conditions were changed, and the color tone results are also shown in Table 1.

In all of these cases, no fading was observed in the dye dissolution acceleration test conducted by stirring in water or ethanol as in Example 1.

Examples 8 to 11 Examples 8 to 11 were carried out under the same conditions as in Example 3 except that the type of object to be dyed was changed, and the color tone results are also shown in Table 2.

Incidentally, in the results of the dye dissolution acceleration test conducted by stirring in water or ethanol in the same manner as in Example 1, no fading was observed in any of these cases.

Examples 12 to 15 Tests were carried out under the same conditions as in Example 3, except that the type of object to be dyed was changed and silver colloid was used instead of gold colloid. The color tone results are also shown in Table 3.

Incidentally, the results of the dye dissolution acceleration test conducted by stirring in water or ethanol similar to those in Examples showed that no color addition was observed in any of these cases.

(Effects of the Invention) The colored compound material according to the present invention is dyed with precious metal colloid, so it is of course non-toxic, but it can also be dyed to the unique color tone of precious metal colloid, and has excellent durability such as not fading. It is excellent.

Furthermore, the coloring compound according to the present invention can be dyed in a variety of ways by selecting the type and concentration of the noble metal colloid and the dyeing conditions.

Furthermore, molded rubber or plastic products using the colored compound of the present invention have excellent moldability during processing, and the products have good mechanical strength and texture, as well as uniform color tone. Moreover, it can be expected to be effective in improving the performance and design of products, such as being able to impart a variety of designs.

Claims (1)

[Claims] (1) Organic or inorganic coloring compound material that is dyed using a dispersion aqueous solution of noble metal colloid coated with surfactant and/or water-soluble polymer.