JP3573481B2 - Resin composition - Google Patents

Description

【００２０】
【発明の効果】
本発明によれば、表１に示すように輝きと奥行きのある高級な蛍光メタリック調の成形品を容易に提供することができる。[0001]
[Industrial applications]
INDUSTRIAL APPLICABILITY The present invention is used for decorative parts such as key holders, buttons, cases, patterns and the like, or parts which emphasize appearance, such as pachinko shells, camera parts, OA equipment housings, pipes, automobile exteriors The present invention relates to a resin composition used for articles and the like.
[0002]
[Prior art]
BACKGROUND ART A resin molded product having a metallic appearance has been conventionally known. However, the conventional technique merely adds various metallic agents for imparting a metallic tone to the resin molded product. As the metallic agent, metal foil, various metal-deposited films, various metal-coated glass flakes, various metal-coated mica, and the like are known. However, the molded article obtained in this way was apt to cause turbidity, and the metallic tone was not sufficient. There is a need for a metallic luster that is more brilliant and more metallic.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to eliminate such turbidity of a molded article and to easily provide a metallic resin molded article having a shine and depth close to metallic luster.
[0004]
The present inventors have conducted intensive studies to achieve the above object, and as a result, have used a glass flake coated with a metal as a metallic agent, and furthermore a translucent thermoplastic resin containing a fluorescent dye and / or a fluorescent pigment. By using the resin composition, a resin composition capable of obtaining a metallic-like molded product having a brightness close to metallic luster and a depth was completed.
[0005]
[Means for Solving the Problems]
The present invention relates to a glass flake having an average particle size of 0.01 to 3 mm and an average thickness of 1 to 30 μm, wherein a metal is coated on 100 parts by weight of a translucent thermoplastic resin mixed with a fluorescent dye and / or a fluorescent pigment. And 0.01 to 10 parts by weight of the resin composition.
[0006]
The resin used in the present invention is not particularly limited as long as it is a translucent thermoplastic resin that can be melt-molded. For example, light-transmitting resins such as polyethylene, polypropylene, polystyrene, AS, acrylic resin, and polycarbonate can be used. Particularly, a resin having high translucency such as polycarbonate, acrylic resin, polystyrene and AS is preferable. In addition, a mixture of these resins may be used as long as the resin retains a little translucency.
[0007]
The fluorescent dye and / or fluorescent pigment used in the present invention is not particularly limited as long as it can be used for a thermoplastic resin. For example, xanthene type, thiazole type, thiazine type, perylene type, diaminostilbene type and the like can be mentioned. In particular, a perylene type is preferable, and for example, Lumogen color manufactured by BASF and Fluorescent manufactured by Arimoto Chemical Industry Co., Ltd. are preferable.
[0008]
The amount of the fluorescent dye and / or fluorescent pigment used is not particularly limited. If the amount is too small, it is difficult to obtain a fluorescent color, and if the amount is too large, the translucency is lowered or the discoloration becomes severe. 0.0% by weight is preferable.
[0009]
The glass flake used in the present invention has an average particle size of 0.01 to 3 mm and an average thickness of 1 to 30 μm. If the average particle size does not reach 0.01 mm, it is difficult to obtain a high-grade metallic tone with shine and depth, probably because of lack of smooth surface, and if it exceeds 3 mm, it becomes easy to crush at the time of melt mixing, and it is bothersome. There is no point in doing it. If the average thickness is less than 1 μm, it is not suitable because it is easily crushed. If it exceeds 30 μm, the effect of imparting a metallic tone to the mixed amount is reduced. In addition, the particle size here is the longest part of the flake. The material of the glass flake is not particularly limited as long as it is generally used for a thermoplastic resin, and any of alkali-containing glass, low alkali glass, and non-alkali glass can be used.
[0010]
The metal to be coated on the glass flake may be a metal having a metallic luster and capable of coating the glass, and examples thereof include gold, silver, nickel, and aluminum. The method of coating is not particularly limited, and any method is adopted. For example, a method using electroless plating is preferable, and the thickness of the coating is usually 0.00001 to 10 μm, and the coating is uniformly applied to the smooth surface of the glass flake, preferably to the end surface. The glass flake coated with such a metal can be used as it is, but the surface may be further coated with a treating agent to prevent oxidation or the like, and this is also preferable.
[0011]
If the amount of the glass flakes coated with such a metal is too small, it is difficult to obtain a high-grade metallic tone with brightness and depth, and if it is too large, the physical properties are deteriorated. Therefore, a fluorescent dye and / or a fluorescent pigment are mixed. It is preferable to use 0.01 to 10 parts by weight per 100 parts by weight of the translucent thermoplastic resin. Particularly preferred is 0.05 to 5.0 parts by weight.
[0012]
Further, a stabilizer is preferably added to the composition of the present invention, and a release agent, an antistatic agent or the like having an effective expression amount may be added as long as the purpose is not impaired. The resin composition of the present invention can be produced by mixing the constituent components with, for example, a tumbler, a blender, a Nauter mixer, a Banbury mixer, a kneading roll, an extruder, or the like.
[0013]
【Example】
Hereinafter, the present invention will be further described with reference to examples. The parts in the examples are parts by weight. The evaluation was carried out by visually observing a 50 mm × 50 mm × 2 mm sample plate for fluorescent metallic tone and measuring the glossiness with a gloss meter manufactured by Nippon Denshoku Industries Co., Ltd.
[0014]
[Example 1]
99.98 parts of polycarbonate [Panlite L-1225WP manufactured by Teijin Chemicals Ltd.], 0.02 part of fluorescent dye [Lumogen F Red300 manufactured by BASF JAPAN Co., Ltd.], nickel-coated glass flake [Metashine manufactured by Nippon Sheet Glass Co., Ltd.] Nickel RCFSX-5230NS (9042) Glass flakes having an average particle size of 0.23 mm and an average thickness of 5 μm coated with nickel of a thickness of 0.15 μm by electroless plating] Extruded with 0.5 parts at a cylinder temperature of 280 ° C. And pelletized. A sample plate was prepared from the pellets using an injection molding machine [Nestal Cycap 480/150 manufactured by Sumitomo Heavy Industries, Ltd.] at a cylinder temperature of 280 ° C. and a mold temperature of 80 ° C. Table 1 shows the evaluation results.
[0015]
[Comparative Example 1]
Pellets were obtained in the same manner as in Example 1, except that 1.0 part of aluminum powder (average particle size: 50 μm) was used instead of the nickel-coated glass flake used in Example 1. Next, a sample plate was prepared in the same manner as in Example 1. Table 1 shows the evaluation results.
[0016]
[Comparative Example 2]
Same as Example 1 except that 0.1 part of a red dye having no fluorescence [Plast Red 8360 manufactured by Arimoto Chemical Industry Co., Ltd.] is used instead of the fluorescent dye Lumogen F Red300 used in Example 1 To obtain a pellet. Next, a sample plate was prepared in the same manner as in Example 1.
[0017]
[Example 2]
99.7 parts of polystyrene [DENKA STYROL GP-1 manufactured by Denki Kagaku Kogyo KK], 0.3 parts of fluorescent pigment [DAY-GLO Signal Green 18 manufactured by DAY-GLO COLOR CORP], silver-coated glass flakes [Nippon Sheet Glass Co., Ltd.] Metashine Silver RCFSX-5090PS (9026) A glass flake having an average particle size of 0.09 mm and an average thickness of 5 μm coated with silver having a thickness of 0.15 μm by electroless plating] 5.0 parts of an extruder [ It was extruded at a cylinder temperature of 200 ° C. using VSK-30 manufactured by Nakatanani Co., Ltd. and pelletized. A sample plate was prepared from the pellets using an injection molding machine [Nestal Cycap 480/150 manufactured by Sumitomo Heavy Industries, Ltd.] at a cylinder temperature of 200 ° C. and a mold temperature of 50 ° C. Table 1 shows the evaluation results.
[0018]
[Comparative Example 3]
Pelletization was carried out in the same manner as in Example 2 except that 5.0 parts of stainless steel powder (average particle size: 30 μm) was used instead of the silver-coated glass flake used in Example 2. Next, a sample plate was prepared in the same manner as in Example 2. Table 1 shows the evaluation results.
[0019]
[Table 1]

[0020]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, as shown in Table 1, it can provide easily the high-grade fluorescent metallic-tone molded article with brightness and depth.

Claims (2)

100 parts by weight of a translucent thermoplastic resin containing a fluorescent dye and / or a fluorescent pigment is coated with a metal flake having an average particle diameter of 0.01 to 3 mm and an average thickness of 1 to 30 μm. A resin composition formulated with 10 to 10 parts by weight. The resin composition according to claim 1, wherein the thermoplastic resin contains 0.001 to 5.0% by weight of a fluorescent dye and / or a fluorescent pigment.