JPH0925447A - Colored master batch containing filler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject master batch capable of providing a colored composite material, in which filler and coloring agent are uniformly dispersed, excellent in dimensional stability by blending a thermoplastic resin with a filler and a coloring agent in a high concentration. SOLUTION: This master batch is obtained by blending (A) 100 pts.wt. thermoplastic resin (e.g. polyethylene or polypropylene) with (B) 20 200 pts.wt. filler (e.g. talc or clay) and (C) 5-100 pts.wt. coloring agent. A coloring agent obtained by blending a pigment such as an azo-based dye or titanium oxide with a synthetic wax, a metal soap, a surfactant, etc., and uniformly mixing these components is preferably used as the component C. Furthermore, the master batch is preferably obtained by heating and melting components A to C according to a conventional method comprising a stirring and mixing components A to C and heating, and then kneading the mixture with an extruder, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filler-containing colored masterbatch, and more specifically, a polypropylene colored molding resin having excellent dimensional stability when blended with a polypropylene resin and subjected to molding processing such as extrusion molding and injection molding. And a filler-containing colored masterbatch for providing

[0002]

2. Description of the Related Art In recent years, polypropylene composite materials have been widely used as materials for automobile parts and home electric appliances. Usually, these polypropylene-based composite materials are blended with an inorganic filler such as talc, mica and glass fiber in order to improve rigidity and stabilize dimensions. A polypropylene-based composite material containing these inorganic fillers is generally supplied to a molding maker as a compound by mixing the polypropylene resin with an inorganic filler in advance by a resin maker. However, if the polypropylene resin is mixed with inorganic fillers, modifiers, etc. in advance and extrusion-molded, and it is provided to the molding maker as a pelletized compound, the cost of the raw material resin will increase, and thus integration of grades will be avoided. Therefore, improvement was desired.

[0003]

Therefore, an object of the present invention is to color-form a polypropylene-based composite material without compounding the inorganic filler to be incorporated in the polypropylene-based composite material in advance with the polypropylene resin and compounding it. To provide a colored masterbatch capable of obtaining a colored polypropylene-based composite material in which the inorganic filler and the coloring agent are uniformly dispersed, which is determined only by melt-mixing the filler-containing colored masterbatch with the polypropylene resin. It is in.

[0004]

As a result of intensive studies to solve the above problems, the inventors of the present invention blended a thermoplastic resin with an inorganic filler and a coloring agent at high concentrations to form a masterbatch. The present invention has been accomplished by finding that a polypropylene composite material having excellent dimensional stability and low cost can be obtained by adding this masterbatch to a polypropylene resin during the molding process of the polypropylene composite material. That is, the present invention provides (1) thermoplastic resin 1
20 to 200 parts by weight of filler and 5 parts by weight of coloring agent
To 100 parts by weight of a filler-containing colored masterbatch, (2) the filler is one or more selected from talc, clay, mica, calcium silicate, calcium carbonate, and precipitated barium sulfate (1 (3) The filler-containing colored masterbatch, and (3) the colorant is a pigment alone or a processed pigment in which one or more kinds selected from metal soap, synthetic wax, surfactant and low molecular weight polyethylene are mixed. The filler-containing colored masterbatch according to item (1), and (4) the filler-containing colored masterbatch according to item (1), wherein the thermoplastic resin is polyethylene, polypropylene, or an ethylene-vinyl acetate copolymer.

Examples of the thermoplastic resin used in the present invention include polyethylene, polypropylene, ethylene / propylene-block copolymers, ethylene-vinyl acetate copolymers and the like. Examples of the inorganic filler to be blended with the above thermoplastic resin include talc, clay,
Examples thereof include mica, calcium silicate, calcium carbonate, precipitated barium sulfate and glass fiber. The inorganic filler is mixed in the range of 20 to 200 parts by weight with respect to 100 parts by weight of the thermoplastic resin. If it is 20 parts by weight or less, the strength and dimensional stability of the polypropylene-based composite material cannot be sufficiently obtained, and if it is 200 parts by weight or more, the production of the masterbatch becomes difficult, which is not preferable. Examples of the pigment used in the colorant of the present invention include azo pigments, anthraquinone pigments, quinacridone pigments, phthalocyanine pigments, perylene pigments, perinone pigments, dioxazine pigments,
Examples thereof include organic pigments such as quinophthalone pigments, and inorganic pigments such as titanium oxide, red iron oxide, ultramarine blue, dark blue, yellow lead, chrome vermilion, and complex oxide pigments. In the present invention, in addition to the above pigments, synthetic wax, metal soap, surfactant,
Various additives such as an antioxidant, an ultraviolet absorber and a stabilizer are blended, and this blend is uniformly mixed with a high speed mixer or a mixing roll to obtain a colorant. The above colorant is added in an amount of 5 to 100 parts by weight in 100 parts by weight of the thermoplastic resin. The filler-containing colored masterbatch of the present invention is produced by heating and melting according to a usual method. That is, a thermoplastic resin, an inorganic filler and a colorant are mixed by stirring and kneaded by a mixing roll, a Banbury mixer, a kneader, an extrusion molding machine or the like, and processed into a granular or columnar shape.

[0006]

Next, the present invention will be described specifically with reference to examples. Example 1 [Production of Colored Masterbatch Containing Filler] 30 parts by weight of polypropylene block copolymer (trade name: Mitsubishi Polypro BC-03C manufactured by Mitsubishi Chemical Corporation) Talc (trade name: Crown Talc P-2 manufactured by Matsumura Sangyo Co., Ltd.) 60 parts by weight Colorant 10 parts by weight (composition) Titanium dioxide (trade name: Taipaque CR-50 Ishihara Sangyo Co., Ltd. product) 1.5 parts by weight Ultramarine blue (trade name: # 2000 Gunsei Daiichi Kasei Kogyo Co., Ltd. product) 1.5 parts by weight Part Yellow iron oxide (Product name: Mapico Titanium Titanium Industry Co., Ltd. product) 1.5 parts by weight Carbon Black (Product name: Carbon Black # 30 Mitsubishi Chemical Co. product) 1.5 parts by weight Low molecular weight polyethylene wax (Product name: Sun Wax 151) -P Sanyo Kasei Co., Ltd. product) 4.0 parts by weight The above blends are uniformly mixed with a high-speed mixer (Henschel mixer). The mixture is then 220
An extruded pellet masterbatch was obtained at ℃. [Molding of Molded Plate (Test Piece)] 5 parts by weight of the above masterbatch and 100 parts by weight of a polypropylene block copolymer containing ethylene propylene rubber are mixed by a tumbler, and a molding temperature of 220 ° C., a back pressure of 15 kg /
A test piece was made in cm ² . In the obtained test piece, talc and pigment were uniformly dispersed, and neither aggregated particles nor color unevenness was observed. Table 1 shows the shrinkage rate of the test piece after molding and the heat shrinkage rate after annealing at 90 ° C. for 30 minutes. Example 2 [Production of Colored Masterbatch Containing Filler] 40 parts by weight of polypropylene block copolymer (trade name: Mitsubishi Polypro BC-03C manufactured by Mitsubishi Chemical Corporation) Talc (trade name: Crown Talc P-2 manufactured by Matsumura Sangyo Co., Ltd.) 50 parts by weight Colorant 10 parts by weight (composition) Titanium dioxide (trade name: Taipaque CR-50 Ishihara Sangyo Co., Ltd. product) 1.5 parts by weight Ultramarine blue (trade name: # 2000 Gunsei Daiichi Kasei Kogyo Co., Ltd. product) 1.5 parts by weight Part Yellow iron oxide (Product name: Mapico Titanium Titanium Industry Co., Ltd. product) 1.5 parts by weight Carbon Black (Product name: Carbon Black # 30 Mitsubishi Chemical Co. product) 1.5 parts by weight Magnesium stearate 4.0 parts by weight The materials are uniformly mixed with a high speed mixer (Henschel mixer). The mixture is then 220
An extruded pellet masterbatch was obtained at ℃. [Molding of Molded Plate (Test Piece)] 6 parts by weight of the above masterbatch and 100 parts by weight of an ethylene propylene rubber-containing polypropylene block copolymer are mixed by a tumbler, and a molding temperature of 220 ° C., a back pressure of 15 kg /
A test piece was made in cm ² . In the obtained test piece, talc and pigment were uniformly dispersed, and neither aggregated particles nor color unevenness was observed. Table 1 shows the shrinkage rate of the test piece after molding and the heat shrinkage rate after annealing at 90 ° C. for 30 minutes. Comparative Example 1 90 parts by weight of polypropylene block copolymer (trade name: Mitsubishi Polypro BC-03C manufactured by Mitsubishi Chemical Co., Ltd.) Colorant: 10 parts by weight (composition) Titanium dioxide (trade name: Taipaque CR-50 manufactured by Ishihara Sangyo Co., Ltd.) 1. 5 parts by weight Ultramarine blue (brand name: # 2000 Ultramarine blue product from Daiichi Kasei Kogyo Co., Ltd.) 1.5 parts by weight yellow iron oxide (trade name: Mapico Titanium Titanium Industry Co., Ltd. product) 1.5 parts by weight carbon black (trade name: Carbon Black # 30 Mitsubishi Chemical Co., Ltd. product) 1.5 parts by weight Magnesium stearate 4.0 parts by weight The above components are uniformly mixed with a high speed mixer (Henschel mixer). The mixture is then 220
An extruded pellet masterbatch was obtained at ℃. [Molding of Molded Plate (Test Piece)] 5 parts by weight of the above masterbatch and 100 parts by weight of a polypropylene block copolymer containing ethylene propylene rubber are mixed by a tumbler, and a molding temperature of 220 ° C., a back pressure of 15 kg /
A test piece was made in cm ² . In the obtained test piece, talc and pigment were uniformly dispersed, and neither aggregated particles nor color unevenness was observed. Table 1 shows the shrinkage rate of the test piece after molding and the heat shrinkage rate after annealing at 90 ° C. for 30 minutes. Comparative Example 2 97 parts by weight of polypropylene block copolymer (trade name: Mitsubishi Polypro BC-03C manufactured by Mitsubishi Chemical Corporation) Talc (trade name: Crown Talc P-2 manufactured by Matsumura Sangyo Co., Ltd.) 3 parts by weight Colorant 0.5 parts by weight (Composition) Titanium dioxide (Product name: Taipaque CR-50 Ishihara Sangyo Co., Ltd. product) 0.08 parts by weight Ultramarine blue (Product name: # 2000 Ultramarine blue product from Daiichi Kasei Kogyo Co., Ltd.) 0.08 parts by weight Yellow iron oxide (Product name: Mapico Titanium Product of Titanium Industry Co., Ltd. 0.08 part by weight Carbon Black (Product name: Carbon Black # 30 Mitsubishi Chemical Co., Ltd. product) 0.08 part by weight Magnesium stearate 0.18 part by weight The above mixture is mixed with a high speed mixer (Henschel mixer). ) And mix evenly. The mixture is then 220
Extruded colored pellets were obtained at ° C. [Molding of molded plate (test piece)] The above-mentioned colored pellets are molded with an injection molding machine at a temperature of 220 ° C and a back pressure of 15 kg / cm.
Created a test piece in ² . In the obtained test piece, talc and pigment were uniformly dispersed, and neither aggregated particles nor color unevenness was observed. Table 1 shows the shrinkage rate of the test piece after molding and the heat shrinkage rate after annealing at 90 ° C. for 30 minutes.

[0007]

[Table 1]

[0008]

INDUSTRIAL APPLICABILITY The filler-containing colored masterbatch of the present invention uses a filler and a colorant in combination in the masterbatch, so that the resin grades can be integrated and the cost can be reduced. In addition, a colored molded product having excellent rigidity and dimensional stability can be obtained by diluting with a thermoplastic resin to adjust the filler concentration of the final molded product to 2 to 3% by weight.

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location C08K 5/00 KAJ C08K 5/00 KAJ // C08L 23:10

Claims (4)

[Claims] 1. A filler of 20 parts by weight per 100 parts by weight of a thermoplastic resin.
A filler-containing colored masterbatch prepared by mixing 200 parts by weight and 5 to 100 parts by weight of a colorant. 2. The filler-containing colored masterbatch according to claim 1, wherein the filler is one or more selected from talc, clay, mica, calcium silicate, calcium carbonate, and precipitated barium sulfate. 3. The filler-containing coloring according to claim 1, wherein the coloring agent is a pigment alone or a processed pigment in which one or more kinds selected from metal soap, synthetic wax, surfactant and low molecular weight polyethylene are mixed with the pigment. Master Badge. 4. The filler-containing colored masterbatch according to claim 1, wherein the thermoplastic resin is polyethylene, polypropylene or an ethylene-vinyl acetate copolymer.