JPH04325563A - Colored resin composition, colorant, and molded article - Google Patents

Abstract

PURPOSE:To prepare a deeply metallic colored, beautiful molding having an excellent decorative pattern easily with a high reproducibility by a usual molding method such as extrusion or injection molding. CONSTITUTION:A colored resin compsn. or colorant that comprises a resin such as a vinyl chloride, polystyrene, or polypropylene resin, a pearlescent pigment having a light coherence, and a black to grey nonmeltable fiber such as carbon fiber or stainless steel fiber; and a molding prepd. by molding the compsn.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a colored resin composition capable of imparting a beautiful deep metallic pattern to the surface of a resin molded article to give it a decorative feel.

0002

2. Description of the Related Art Conventionally, various methods have been attempted for the purpose of imparting metallic patterns to resin molded products. The most common methods are to form a pattern using ink mixed with metal powder or mica powder, or to create a pattern by laminating metal-deposited films or metal foils.
Furthermore, the surface is embossed to give it a deep decorative effect. There is also a method of using a pearl pigment that has light interference properties, and in this case, it is known that if the back side is black, the iris properties are significantly emphasized.

0003

[Problems to be Solved by the Invention] However, the above-described method does not produce a beautiful deep metallic pattern, but only a flat decorative molded product.

0004

[Means for Solving the Problems] As a result of intensive studies by the inventors to obtain a colored resin composition that gives a beautiful pattern with a deep metallic tone and a decorative feel, the inventors discovered that the molding temperature of the resin (usually 150 Using a colored resin composition in which fibers such as stainless steel fibers or carbon fibers that do not melt at temperatures (~300℃) are dispersed in the resin together with pearl pigments does not have the above drawbacks and can be easily molded to a deep shape using normal molding methods. The present inventors have discovered that a colored resin composition can be obtained that has a beautiful metallic pattern and can provide decorative molded products, and has completed the present invention.

That is, the present invention provides a colored resin composition characterized by containing a resin (A), a pearlescent pigment (B), and black to gray non-melting fibers (C), and this colored resin composition. A molded article characterized by being formed by molding the above colored resin composition, and a molded article characterized by being formed by mixing the above coloring agent and resin and then molding. It provides molded products.

Examples of the resin (A) used in the present invention include vinyl chloride resin, polystyrene, polypropylene, polyethylene, AS resin, ABS resin, acrylic resin,
Examples include thermoplastic resins such as urethane resins, phenol resins, melamine resins, epoxy resins, unsaturated polyester resins, epoxy vinyl ester resins, urethane resins, and among them, thermoplastic resins are preferred.

[0007] As the pearl pigment (B), any of various pearl color pigments can be used. For example, mica with a thin film of titanium dioxide formed on the surface of mica, or mica with a thin film of black lower titanium oxide formed on the surface of mica. In addition, those with a thin film of titanium dioxide formed thereon, etc. Among them, those with optical interference properties include various colors due to the optical interference effect, such as gold, copper color, wine color, purple, blue, green, etc. It is preferable because it is particularly effective in producing a beautiful metallic pattern by developing an iris color.

As the black to gray non-melting fibers (C), any black to gray fibrous material that does not melt during molding of the resin (A) can be used, such as various metal fibers such as stainless steel fibers, carbon fibers, etc. Among them, black carbon fiber is preferred.

[0009] As for the stainless steel fibers used here, it is preferable to use one in which 500 to 20,000 stainless steel fibers with a fiber diameter of 5 to 30 μm and a fiber length of about 1 to 10 mm are bundled with a binder resin. This is preferable in this respect. Examples of the binder resin include ethylene-vinyl acetate copolymer, polyethylene terephthalate, ethylene-ethyl acrylate copolymer, polyethylene wax, and metal stearate.

[0010] Also, carbon fibers with a fiber diameter of 5 to 3
It is preferable to use a material having a fiber length of 0 μm and a fiber length of 0.1 to 10 mm because the fibers do not become entangled with each other and a beautiful pattern can be easily obtained.

The proportions of the three components, the resin (A), the pearlescent pigment (B), and the fiber (C), to be contained in the colored resin composition and molded article of the present invention vary depending on the desired thickness of the molded article. For example, in thin-walled molded products such as films and sheets, pearlescent pigment (B) and fiber (C) are used for resin (A).
Although it is necessary to increase the usage ratio of resin (A) 100
Normally, the pearlescent pigment (B) is 0.5 to 10 parts by weight and the fiber (C) is 0.5 to 20 parts by weight, with the pigment (B) being 1 part by weight. A preferable range is 5 parts by weight and 1 to 10 parts by weight of fiber (C).

The method for obtaining the colored resin composition of the present invention is as follows: (1) The resin (A), the pearlescent pigment (B), the fiber (C), and optionally additives such as a dispersant are mixed in a predetermined ratio. A method of simply mixing may be used, but in particular ■Pearl color pigment (B
) and fiber (C) in a high concentration, and diluting this with a resin that is the same as or compatible with the resin (A) contained in the colorant; Preferred is a method of mixing A) with a pearlescent pigment (B) that has been dispersed and a fiber (C) that has been treated to loosen it appropriately.

[0013] The method for obtaining the colorant of the present invention is as follows:
For example, resin (A), pearlescent pigment (B), fiber (C), and if necessary, additives such as dispersants are usually mixed with resin (
A) A method of mixing 1 to 30 parts by weight of the pearlescent pigment and 1 to 60 parts by weight of the fiber (C) per 100 parts by weight, followed by melt-kneading and processing into granules; A
), pearlescent pigment (B) dispersed and/or fiber (C) treated to moderately loosen it, and if necessary, additives (A), (B) and (C).
Examples include a method in which the ingredients are mixed in the same proportions as above, then melt-kneaded and processed into granules.

[0014] In addition, examples of products obtained by dispersing the pearlescent pigment (B) include, for example, the pearlescent pigment (B) and the resin (A).
Or a resin compatible with the resin (A) and additives such as plasticizers and lubricants are melt-kneaded, cooled and crushed, or a dispersion of pearlescent pigment (B) and metal soap and/or wax, etc. Examples include those obtained by melt-kneading, cooling, and pulverizing the resin (A), and the former uses a vinyl chloride resin as the resin (A), while the latter uses a resin other than vinyl chloride resin as the resin (A). Usually used when using

Further, examples of fibers (C) treated to loosen them appropriately include, for example, the stainless steel fibers bundled together, and carbon fibers cut into pieces of about 0.1 to 10 mm and resin ( A) or a resin that is compatible with the resin (A) and additives such as plasticizers and lubricants are melt-kneaded, cooled and crushed, and carbon fibers and metal soap cut into pieces of about 0.1 to 10 mm. and/or wax etc. are melted and kneaded, then cooled and crushed, etc.
In this case as well, the former is usually used when a vinyl chloride resin is used, and the latter is usually used when a resin other than vinyl chloride resin is used. It goes without saying that a product obtained by simultaneously treating the pearlescent pigment (B) and the fiber (C) can also be used.

When the resin (A) is a vinyl chloride resin, examples of resins compatible with the resin (A) used here include various vinyl chloride resins such as ethylene-vinyl chloride copolymer, methyl methacrylate-based resins, etc. Butadiene-styrene copolymer (MBS resin), ABS resin, acrylic oligomer, etc. are used as plasticizers, such as dioctyl phthalate (D
OP), dioctyl adipate, polyester plasticizers, and epoxidized soybean oil; further, examples of lubricants include polyethylene wax, ethylene bisstearamide, and the like.

[0017] In order to obtain the molded article of the present invention, the colored resin composition of the present invention may be molded by any method; It is preferable to control the dispersion state to avoid this. Examples of the molding method include injection molding, extrusion molding, press molding, and calendering.

In addition to the above-mentioned additives, the colored resin composition and colorant of the present invention may contain, for example, antistatic agents, antioxidants, ultraviolet absorbers, dyes and pigments other than pearlescent pigments, etc. You can also do it.

[0019]

[Examples] The present invention will be explained in more detail by showing Examples and Comparative Examples below. In addition, all parts and percentages in the examples are based on weight.

Example 1 Pearl-colored pigment with golden light interference (Merck & Co., Ltd. I)
riodin 205Rutile Platin
um Gold), 20 parts of methyl methacrylate oligomer, 10 parts of ethylene-vinyl chloride copolymer (degree of polymerization 600), 10 parts of polyethylene wax, and 10 parts of epoxidized soybean oil were mixed in a kneader at 120°C for 30 parts. After melt-kneading for a minute, it is cooled and pulverized to form a granular colorant (B-
1) was obtained.

[0021] The above colorant (B-1) was also used except that pitch-based carbon fiber [DONAC Co., Ltd., Dona Carbo S-242, fiber type 13 μm, fiber length 0.37 μm] was used instead of the pearl color pigment. Granular fiber treated product (
C-1) was obtained.

Next, vinyl chloride resin (degree of polymerization 800)
A vinyl chloride resin compound was obtained by mixing 100 parts of DOP, 20 parts of DOP, 10 parts of MBS resin, 3 parts of barium/zinc stabilizer, and 3 parts of epoxidized soybean oil, and 100 parts of this compound and granular colorant (B-1 ) and 20 parts of the granular fiber treated product (C-1) were mixed in a tumbler, kneaded with two rolls until the pigment and carbon fibers were not too dispersed, and then kneaded with a calender machine to a thickness of 0. A sheet of .2 mm was obtained.

[0023] The surface of this sheet had a beautiful deep metallic pattern with a flowing pattern and a sharp pattern orthogonal to each other on a dark gold background, and had an excellent decorative feel.

Comparative Example 1 A granular colorant (B'-1) was obtained in the same manner as in Example 1 except that titanium oxide was used instead of the pearlescent pigment.

Next, a 0.2 mm thick sheet was prepared in the same manner as in Example 1 except that 1.5 parts of the above granular colorant (B'-1) was used instead of 6 parts of granular colorant (B-1). Obtained. Although the surface of this sheet exhibited a metallic tone with a black spot pattern on a light gray background, it did not exhibit a deep and beautiful metallic tone and lacked a decorative feel.

Example 2 Polystyrene (Idemitsu Styrene NF manufactured by Idemitsu Petrochemical Co., Ltd.)
-20] 100 parts and pitch-based carbon fiber (Donna Carbo S-
242) 0.4 parts of pearlescent pigment (
Iriodin 153 Flash manufactured by Merck & Co.
Pearl) 1 part and magnesium stearate 0.2
This mixture was melt-kneaded at 230° C. using a vented extruder to form pellets, and then injection molded to obtain a flat plate of 30×50×2 mm.

The surface of this flat plate had a beautiful deep metallic pattern with a black flow pattern on a light gray background, giving it an excellent decorative feel.

Comparative Example 2 Pelletization was performed in the same manner as in Example 2 except that 0.5 parts of titanium oxide was used instead of 1 part of the pearlescent pigment, and then injection molding was performed to obtain a flat plate of 30 x 50 x 2 mm. .

Although the surface of this flat plate had a metallic tone with a black spot pattern on a light gray background, it did not have a deep and beautiful metallic tone and had a poor decorative feel.

Example 3 100 parts of polystyrene (Idemitsu Styrol NF-20), 10 parts of pitch-based carbon fiber (Donna Carbo S-242), and a pearlescent pigment that does not have optical interference (Iriod manufactured by Merck & Co., Ltd.)
in 121 Rutile Lustre
Satin) and 3 parts of magnesium stearate were mixed in a tumbler, and then 23 parts of magnesium stearate was mixed in a vented extruder.
The mixture was melt-kneaded at 0° C. and pelletized to obtain a masterbatch of colorant and carbon fiber. Next, this masterbatch 10
and 90 parts of polystyrene (Idemitsu styrene NF-20) were mixed in a tumbler, extruded into a flat plate at 220°C using an extruder, and cut to obtain a flat plate with a thickness of 1 mm.

The surface of this flat plate had a beautiful deep metallic pattern with a black flow pattern on a light gray background, and had an excellent decorative appearance.

Example 4 Pitch-based carbon fiber [Donac Carbo S-3 manufactured by Donac Co., Ltd.
42, fiber diameter 18 μm, fiber length 0.5 mm] 30 parts and a pearl color pigment with red light interference (Ir
iodin 215 Rutile Red
Pearl) and 40 parts of magnesium stearate were melt-kneaded in a kneader at 120°C for 10 minutes, and then
It was cooled and ground to obtain a fiber-containing granular colorant (BC-4).

Next, 100 parts of polypropylene [Hypol J840F manufactured by Mitsui Petrochemical Industries, Ltd.] and 6.7 parts of the above fiber-containing granular colorant (BC-4) were mixed in a tumbler, and then 230 parts of polypropylene was mixed in a vented extruder. °C melt kneading,
Pelletize and injection mold at 220℃ to 30 x 50 x 2
A flat plate of mm was obtained.

The surface of this flat plate had a beautiful deep metallic pattern with a black flowing pattern on a wine-colored background, and had an excellent decorative appearance.

Example 5 100 parts of polypropylene (Hypol J840F) and a stainless steel fiber bundle tip [Susmix fiber bundle chip manufactured by Tokyo Steel Corporation, fiber diameter 8 μm, fiber length 6 m
m, number of bundles: 5,700, sizing agent, EVA, stainless steel fiber content: 90%] 4 parts, and a pearlescent pigment with blue light interference (Iriodin 225 Ru manufactured by Merck & Co.)
1 part of Tile Blue Pearl) in a tumbler, melt-kneaded at 230°C using a vented extruder, pelletized, and then injection molded at 220°C.
A flat plate of 0 x 50 x 2 mm was obtained.

The surface of this flat plate had a beautiful deep metallic pattern with a black flowing pattern on a dark blue background, and had an excellent decorative appearance.

Example 6 100 parts of polystyrene (Idemitsu styrene NF-20) and a stainless steel bundled tip (Susmix fiber bundled tip manufactured by Tokyo Steel Corporation, fiber diameter 15 μm, fiber length 6 m)
m, number of bundles: 1,900, sizing agent, EVA, stainless steel fiber content: 88%] 3 parts and a pearlescent pigment (Iriodin 225 Rutile) with blue light interference.
A flat plate of 30 x 50 x 2 mm was obtained in the same manner as in Example 5, except that 1 part of Blue Pearl) and 0.5 part of magnesium stearate were mixed in a tumbler.

The surface of this flat plate had a beautiful deep metallic pattern with a black flowing pattern on a dark blue background, giving it an excellent decorative feel.

Example 7 100 parts of polystyrene (Idemitsu Styrene NF-20), 0.2 parts of pitch-based carbon fiber (Donna Carbo S-242), and a stainless fiber bundled tip (Susmix fiber bundled chip, fiber diameter 15 μm, fiber length 6mm, number of bundles: 1900, binding agent, EVA, stainless steel fiber content: 8
8%] 1.5 parts and a pearlescent pigment that does not have optical interference (Iriodin 153 Flash manufactured by Merck & Co.)
Example 5 except that 1 part of Pearl) and 0.3 part of magnesium stearate were mixed in a tumbler.
A flat plate of 30 x 50 x 2 mm was obtained in the same manner as above.

The surface of this flat plate had a beautiful deep metallic pattern with a black flow pattern on a light gray background, and had an excellent decorative appearance.

[0041]

Effects of the Invention: By using the colored resin composition of the present invention, molded products with beautiful, deep metallic patterns and excellent decorative patterns can be easily reproducible by ordinary molding methods such as extrusion molding and injection molding. Can be manufactured well.

Claims (10)

[Claims] 1. A colored resin composition comprising a resin (A), a pearlescent pigment (B), and black to gray non-melting fibers (C). 2. The composition according to claim 1, wherein the resin (A) is a thermoplastic resin. 3. The composition according to claim 1 or 2, wherein the pearlescent pigment (B) is a pearlescent pigment having optical interference. [Claim 4] The fiber (C) is stainless steel fiber and/or
The composition according to claim 3, which is carbon fiber. [Claim 5]Claim 3, wherein the fiber (C) is carbon fiber.
Compositions as described. 6. The product is a mixture of a resin (A), a pearlescent pigment (B) dispersed therein, and a fiber (C) dispersedly treated. Composition of. 7. 0.1 to 10 parts by weight of pearlescent pigment (B) and fiber (C) to 100 parts by weight of resin (A).
) in a range of 0.1 to 10 parts by weight.
Or the composition according to 6. 8. A coloring agent comprising the colored resin composition according to claim 1. 9. A molded article obtained by molding the colored resin composition according to any one of claims 1 to 7. 10. A molded article, which is obtained by mixing the colorant according to claim 8 with a resin and then molding the mixture.