JP2001311006A - Resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a metal-containing resin composition colored to clear colors such as red, green and purple. SOLUTION: This resin composition is composed of a thermoplastic resin, a metal powder and a metallic compound pigment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal-containing resin composition colored vividly, such as red, green, purple, and orange.

[0002]

2. Description of the Related Art Conventionally, as a material having a high specific gravity, not only a metal itself but also a material produced by adding a metal to a resin has been used. However, the color of the metal itself is not clear although it has a metallic luster, and it becomes dark due to surface oxidation. Therefore, the color tone of the resin containing the metal was not satisfactory. Further, further coating the resin containing the metal is disadvantageous in terms of cost because an extra manufacturing process is required. Since the metal powder is exposed on the surface of the resin molded product, when the specification of the paint is set for a resin, it often peels off and the appearance becomes very unsightly. The same applies to the case where the paint specifications are set for metal.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a metal-containing resin composition which solves the above-mentioned problems of the prior art and exhibits a vivid color without any external coating. To be.

[0004]

The object of the present invention is to provide a resin composition containing a thermoplastic resin, a metal powder and a pigment, wherein the pigment is a metal compound.
A resin composition in which the metal compound is any of pigments containing chromium oxide, lanthanum boride, and ferric oxide as a main component; and a resin in which ferric oxide is any of red iron oxide and Mars-based pigments The resin composition wherein the composition and the thermoplastic resin are selected from polyamide resin, polyphenylene sulfide resin, or amide-based elastomer, and the metal powder is tungsten powder, copper powder, brass powder, stainless steel powder, iron powder, bismuth powder This is achieved by the resin composition which is a simple substance or a mixture selected from the group consisting of: and the resin composition having a specific gravity of 5.0 or more.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The type of thermoplastic resin used in the present invention is not particularly limited, but specific examples thereof include vinyl chloride resin, polyolefin resin, polyacetal resin, polystyrene resin, acrylic resin, acrylonitrile. -Styrene resin, acrylonitrile-butadiene-styrene resin, polycarbonate resin, polyphenylene ether resin, modified polyphenylene ether resin,
Saturated polyester resin, polyphenylene sulfide resin, liquid crystal polymer, polysulfone resin, polyethylene tetrafluoride resin, polyetherimide resin, polyamideimide resin, polyamide resin, polyimide resin, polyethersulfone resin, polyetherketone resin, polythioetherketone resin And polyether ether ketone resins. In addition, thermoplastic elastomers such as styrene, olefin, urethane, ester, vinyl chloride, amide, and fluorine are exemplified, but not limited thereto. These may be used as a mixture of two or more.

[0006] In particular, polyamide resin in terms of mechanical properties,
Polyphenylene sulfide resins and amide-based elastomers are preferred.

[0007] The metal powder used in the present invention is not particularly limited, but those having a large specific gravity are preferable in order to impart a sense of weight. For example, tungsten powder, copper powder, brass powder, stainless steel powder, iron powder, lead powder, bismuth powder and the like can be mentioned, but from an environmental point of view, tungsten powder, copper powder, brass powder, stainless steel powder, iron powder, bismuth powder Are preferred. These may be used as a mixture of two or more. Further, from the viewpoint of cost, tungsten powder, copper powder, brass powder, stainless steel powder, iron powder and the like are preferable.

[0008] The metal powder used in the present invention may be subjected to a coupling treatment in order to increase the adhesiveness with the thermoplastic resin.

Specifically, the metal compound used in the present invention is any one of pigments mainly composed of chromic oxide, lanthanum boride, and ferric oxide.

When chromic oxide is added, the resulting metal-containing resin composition exhibits a green color.

Lanthanum boride exhibits a purple color.

The pigment containing ferric oxide as a main component used in the present invention is, specifically, any of a red iron oxide and a Mars pigment.

[0013] The petiole is a red pigment composed of ferric oxide, and is produced by burning ferric sulfate or iron sulfide.

The Mars-based pigment is a general term for Mars Yellow and various pigments derived therefrom. Specific examples include Mars Yellow produced using ferric sulfate as a starting material, Mars Orange, Mars Red, and Mars Brown produced by firing Mars Yellow. Further, the baking temperature at the time of manufacturing Mars green obtained by mixing Prussian blue with Mars yellow or a red stalk is set to 1000 ° C.
Also includes Mars Violet obtained when placed.

The metal compound used in the present invention may be subjected to a coupling treatment in the same manner as the metal powder in order to increase the adhesiveness to the resin.

The specific gravity of the resin composition obtained in the present invention is preferably 5 or more, and particularly preferably 7.9 or more for iron replacement and 11.3 or more for lead replacement.

The amount of the metal powder used in the present invention can be determined by the specific gravity of the target resin composition, the thermoplastic resin to be used, and the specific gravity of the metal powder to be used. For example, to obtain a green high specific gravity resin composition having a specific gravity of 11.3, 3.9% by weight of 6 nylon resin, 94.5% by weight of tungsten powder, and 1.6% by weight of chromium oxide are used.
become.

Various additives can be added to the resin composition of the present invention without departing from the object of the present invention. Specifically, for example, antioxidants and heat stabilizers (for example, including hindered phenols, hydroquinones, thioethers, phosphites and their substituted products and combinations thereof), ultraviolet absorbers (for example, resorcinol, salicylate, benzotriazole, Benzophenone, etc.), crystal nucleating agents (eg, kaolin, talc, etc.), lubricants and release agents (eg, montanic acid and its salts, stearic acid and its salts, stearyl alcohol, stearyl amide, silicone resins, etc.), reinforcing materials (glass fibers) , Carbon fibers, whiskers, etc.) can be added.

In the resin composition of the present invention, it is preferable that each component is sufficiently dispersed. This is because, when the dispersion is sufficient, color unevenness does not occur and the melt fluidity is sufficient, so that a molded article can be easily obtained by the injection molding method.

For this purpose, for example, a biaxially different-direction rotary extruder is used as a kneading extruder. Specifically, a powdery thermoplastic resin composition, a metal compound and a metal powder which have been subjected to a coupling treatment are sufficiently mixed with a high-shear stirrer (for example, a Henschel mixer or a super mixer), and then mixed in two axes in different directions. A method of supplying to a rotary extruder is exemplified, but not limited to.

[0021]

Industrial Applicability The present invention relates to a metal-containing resin composition colored vividly, such as red, green, and purple, and is useful for applications such as weights.

[0022]

The present invention will be described in more detail with reference to the following examples. The evaluation of physical properties was performed according to the following methods.

Specific gravity: ASTM D792 (test specimen shape: 127 × 13 × 6.4) Hue: visual observation of test specimen

Examples 1 to 3 and Comparative Example 1 Polyamide resin (6 nylon, MC manufactured by Kanebo Gosen Co., Ltd.)
100L) powder, previously coupled with a Henschel mixer (coupling agent manufactured by Dow Corning Toray)
SH6020) treated tungsten powder (D20 manufactured by Tokyo Tungsten Co.) and chromium oxide (manufactured by Toda Kogyo Co., Ltd.) are blended according to the composition shown in Table 1, mixed sufficiently with a Henschel mixer, and then mixed with a twin screw extruder (Nihon Steel Co., Ltd.). Made TEX3
0α). The obtained pellet was formed into a bending test piece (127 × 13 × 6.4) using an injection molding machine (PROMATSG-75 manufactured by Sumitomo Heavy Industries, Ltd.). The specific gravity and hue are also shown in Table 1.

[0025]

[Table 1]

Examples 4 and 5, Comparative Example 2 Polyphenylene sulfide resin (Ryton P manufactured by Toray Industries, Inc.)
PS), copper powder (Cu-At-100 manufactured by Fukuda Metal Foil & Powder Co., Ltd.) or brass powder (Bra-At-1 manufactured by Fukuda Metal & Foil & Powder Co., Ltd.) subjected to coupling treatment in the same manner as in Example 1.
00 Copper: 70%, zinc: 30%) and Mars orange (manufactured by Toda Kogyo Co., Ltd.) with the composition shown in Table 1
A bending test piece was obtained in the same manner as described above, and the same evaluation was performed.
Table 1 shows the results.

Examples 6, 7 and Comparative Example 3 Powder of amide-based elastomer (Daiamide PAE E47 manufactured by Daicel Huls Co.), tungsten powder having been subjected to coupling treatment used in Example 1, and coupling used in Example 4 The treated copper powder and red stalk (made by Toda Kogyo Co., Ltd.) were blended with the compositions shown in Table 2, and a bending test piece was obtained in the same manner as in Example 1, and the same evaluation was performed. Table 2 shows the results.

[0028]

[Table 2]

Examples 8 to 10 and Comparative Example 4 Polyamide resin (66 nylon, Leona 1 manufactured by Asahi Kasei Corporation)
300) powder, tungsten powder and stainless steel powder (manufactured by Daido Steel Co., Ltd.)
Iron powder (KIP300A, manufactured by Kawasaki Steel), Mars Violet (manufactured by Toda Kogyo), and lanthanum boride (manufactured by Nippon Shinkin Co., Ltd.) were blended in the composition shown in Table 2, and a bending test piece was prepared in the same manner as in Example 1. And the same evaluation was performed. Table 2 shows the results
Shown in

As described above, the metal-containing resin composition of the present invention has a vivid color and is suitable for weight-added applications replacing iron and lead. Specifically, weights, flywheels,
Vibration absorbers, shots, fishing gear, gears, etc.

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kazuo Haruta 4-1 Kanebo-cho, Hofu-shi, Yamaguchi Prefecture Kanebo Gosen Co., Ltd. F term (reference) 4J002 AA011 BB001 BC031 BC061 BD041 BD151 BG001 BN151 CB001 CF001 CF161 CG001 CH071 CH091 CL001 CL011 CM041 CM051 CN011 CN031 DA076 DA086 DA106 DA116 DC006 DE097 DE117 DG047 DK007 FA097 FD016 GC00 GM02 GN00

Claims (6)

[Claims] 1. A resin composition containing a thermoplastic resin, metal powder and a pigment, wherein the pigment is a metal compound. 2. A resin composition wherein the metal compound is any one of chromium oxide, lanthanum boride, and a pigment containing ferric oxide as a main component. 3. The resin composition according to claim 1, wherein the ferric oxide is one of a red stalk and a mars pigment. 4. The thermoplastic resin according to claim 1, wherein the thermoplastic resin is selected from a polyamide resin, a polyphenylene sulfide resin, and an amide elastomer.
The resin composition according to any one of the above. 5. The resin according to claim 1, wherein the metal powder is a simple substance or a mixture selected from tungsten powder, copper powder, brass powder, stainless steel powder, iron powder, and bismuth powder. Composition. 6. The resin composition according to claim 1, having a specific gravity of 5.0 or more.