JP3428116B2 - Coloring resin composition - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a resin composition for coloring a thermoplastic resin.

[0002]

2. Description of the Related Art Conventionally, a resin composition for coloring a thermoplastic resin has a powdery dry color obtained by mixing a pigment and a dispersant,
Liquid color or paste color in which a pigment is dispersed in a liquid dispersant at room temperature, pellet-like flake-like or bead-like master batch in which a pigment is dispersed in a resin that is solid at room temperature are available. These coloring compositions,
The masterbatch is preferably used from the viewpoints of easy handling and preservation of working environment during use, although it is properly used depending on the application.
And, the performance required as a masterbatch is also that the pigment concentration is high, the influence on physical properties such as heat resistance and strength of the thermoplastic resin to be colored is small, and the like.
In particular, with the precision and speeding up of molding of polyolefin resins, better pigment dispersibility and distributability have been demanded.

As a dispersant for imparting pigment dispersibility of the masterbatch, stearic acid, zinc stearate, magnesium stearate, aluminum stearate, calcium stearate, ethylene bisamide, polyethylene wax, polypropylene wax, and derivatives thereof, For example, one type or two or more types of waxes made of acid modified products are generally used. However, when a high degree of pigment dispersion is required, such as when a thermoplastic resin is subjected to high-speed spinning with a diameter of a few tens of microns or when it is formed into a film, the above-mentioned dispersant may not be satisfied. That is, there are yarn breakage at the time of spinning due to poor pigment dispersion, clogging of a filter of a melt spinning machine, defective molding of a film, and the like.

In order to solve these problems, efforts have been made to improve the processing method of the masterbatch and to improve the pigment dispersibility by a powerful kneader. However, the above dispersants do not exhibit sufficient pigment dispersibility to solve the above problems. In addition, in the field of large-scale injection molding in which colored pellets have been conventionally used, color unevenness and flow marks have become a problem in coloring molded products as coloring by master batches has increased. Conventionally, in blow molding and film molding in which coloring is performed by a masterbatch, plasticization, mixing and kneading of a resin and a masterbatch are performed in an extruder part of a molding machine. In the case of an injection molding machine, the plasticizing, mixing, and kneading steps are carried out in the cylinder in which the screw moves backward, but the kneading force is not sufficient compared to the extruder, and the molding cycle can be shortened and the viscosity of the molding resin can be reduced. Along with this, the kneading power has become smaller,
As a result, color unevenness is likely to occur on the surface of the molded product. In addition, by increasing the pigment content of the masterbatch, which has been promoted for the purpose of reducing the cost of coloring, the appearance of so-called high-concentration masterbatch reduces the addition amount of the masterbatch to the resin to be colored, and this uneven color The occurrence of flow marks and flow marks has become more likely to occur. In addition, this problem is recognized in various thermoplastic resins, but is prominent in polypropylene-based resins, which have been increasingly used in home appliances and automobile parts, and an urgent solution has been demanded.

In order to solve this problem, among the three main components of the masterbatch (pigment, dispersant and base resin), the content of the dispersant is increased, or the base resin having a viscosity smaller than that of the resin to be colored is selected. It has been attempted to eliminate color unevenness by lowering the melt viscosity of the masterbatch such as by using it. However, for example,
A polypropylene resin filled with an inorganic filler, or a melt flow rate (hereinafter MF) for the purpose of thin-wall molding.
If R) exceeds 25, color unevenness and flow marks are likely to occur, and the solution of this problem has been awaited.

[0006]

DISCLOSURE OF THE INVENTION The present invention improves the above-mentioned various drawbacks, and improves the tensile strength and bending strength of a thermoplastic resin.
A resin composition for coloring a thermoplastic resin (masterbatch) that does not impair physical properties by 5% or more with respect to each mechanical strength value such as impact strength, has excellent pigment dispersibility, and enables uniform coloring without color unevenness Is provided.

[0007]

The first invention is a pigment (a) 1 to 90% by weight, a thermoplastic resin (b) 1 to 90% by weight, an alkylene oxide of an oxy acid and a long-chain alkyl primary alcohol. Esterified products (c) 1-8 with adducts
A thermoplastic resin coloring resin composition comprising 0% by weight.
The oxyacid is ricinoleic acid, 12-hydroxystearate.
Any of allic acid and p-hydroxybenzoic acid oxy acid
And long-chain alkyl primary alcohol alkylene
The resin composition for coloring a thermoplastic resin is characterized in that the oxidant is represented by the following general formula (I) . General formula (I) (However, R is H or CH ₃ , and n is an integer of 20 or more.
The number and m are integers from 1 to 16. )

The second invention is oxyacid and long-chain alkyl
S with primary alcohol alkylene oxide adduct
The oxy acid in the telluride (c) is 12-hydroxy.
Coloring of the first invention characterized by being stearic acid
It is a resin composition for use. The third invention is a thermoplastic resin.
(B) is in the range of melt flow rate 0.1 to 400
It is a polyolefin resin
Alternatively, it is the resin composition for coloring described in the second invention.

In a fourth aspect of the invention, the thermoplastic resin (b) is poly
The third invention characterized in that it is a propylene resin
The above-mentioned coloring resin composition. The fifth aspect of the invention is
Obtained using the coloring resin composition according to any one of the four inventions
It is a molded product.

In the present invention, MFR is JIS K 7210.
The thermoplastic resin (b) is not particularly limited as long as the MFR is in the range of 0.1 to 400, and preferably in the range of 10 to 250. It is not particularly limited as long as it is compatible with the coloring resin. When the MFR is less than 0.1, the thermoplastic resin (b) used for blending has poor compatibility with the polyolefin resin when the thermoplastic resin to be colored is a polyolefin resin, resulting in color unevenness. And the physical properties of the colored polyolefin resin are adversely affected. If the MFR exceeds 400, the mechanical strength and heat resistance of the masterbatch itself will be low, making it difficult to manufacture the masterbatch and improving the heat resistance and various physical properties of the thermoplastic resin to be colored. Have an adverse effect. The thermoplastic resin (b) used for blending may be one which has been subjected to functional group modification, crosslinking modification, grafting and block modification, and may be in the form of powder or pellets.

In the present invention, the esterified product (c) of an oxy acid and an alkylene oxide adduct of a long-chain alkyl primary alcohol is used as a starting material and is an alkylene oxide adduct of an oxy acid and a long-chain alkyl primary alcohol. Is used, but the alkylene oxide adduct of a long-chain alkyl primary alcohol is represented by the following chemical structure.
To be done. It is desirable that the number of methylene chains n is an integer of 20 or more, the number of moles of alkylene oxide addition m is an integer of 1 to 16 , and the alkylene oxide chain is an ethylene oxide chain. General formula (I) (However, R is H or CH ₃ , and n and m are arbitrary integers.) As a commercially available product, Unitox series (manufactured by Petrolite Co., Ltd.) can be mentioned.

The oxyacid used in the present invention is a compound containing at least one or more alcoholic hydroxyl groups and a carboxyl group, such as ricinoleic acid and 12-hydoic acid.
Droxystearic acid, p-hydroxybenzoic acid
That's it. Industrially, 12-hydroxystearic acid is desirable. The esterification reaction using the above components may be carried out in an aqueous system, without solvent, or in combination with a solvent, and is carried out under preferred conditions according to a conventionally known method.

The resin composition of the present invention may be added with a small amount of various additives such as a stabilizer such as an antioxidant and an ultraviolet absorber and a surfactant within a range not impairing the effects of the present invention. it can. The resin composition of the present invention can be used for coloring a thermoplastic resin containing a reinforcing material such as an inorganic filler or glass fiber or organic fiber for the purpose of improving physical properties. For example, it is possible to obtain a uniform coloring without unevenness in color without affecting mechanical properties such as strength and heat resistance that could not be achieved by conventional coloring using a masterbatch. % Polyolefin resin composition 1
It can be realized by adding a small amount of 4 parts by weight or less of the resin composition of the present invention to 00 parts by weight.

The resin composition of the present invention, other than the polyolefin resin, includes polymethylpentene, polystyrene, polyvinyl chloride, polyethylene terephthalate, polybutylene terephthalate, acrylonitrile-butadiene-styrene (ABS) resin, acrylonitrile-E.
It can also be blended with a thermoplastic resin such as PDM-styrene (AES) resin, acrylic resin, polyamide, polycarbonate, polyacetal or polyurethane. It is shown that the resin composition of the present invention is extremely effective in improving the dispersibility and coloring power of the pigment. The improvement in dispersibility and coloring power is due to the affinity of the hydroxyl group or alkylene oxide bonding group in the compound for the pigment, and the polar group in the copolymer forms a plurality of polar bonds with the pigment. It is considered that it has a protective colloidal structure in which it is surrounded by the hydrophobic portion of the thermoplastic resin.

[0015]

EXAMPLES The present invention will be specifically described below with reference to examples. In the examples, “part” means “part by weight” and “%” means “% by weight”. [Example 1] Compound 1 30% by weight Phthalocyanine blue "Rionol Bull-7110V" (manufactured by Toyo Ink Mfg. Co., Ltd.) 50% by weight Polypropylene "Mitsui Noblen J4HG" (Mitsui Petrochemical Co., Ltd., MFR: 30) 20 % By weight After premixing the above 3 components with a Henschel mixer, kneading with a three roll mill, screw diameter 65 m
m was extruded into pellets to obtain a masterbatch. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. 100 parts by weight of polypropylene "Mitsui Noblen J4HG" was mixed with 3 parts of the obtained masterbatch, and a vertical test spinning machine (Fuji Filter Co., Ltd. spinning tester) was used.
After spinning at 230 ° C. under a hopper, at a kneading section and a die section at 230 ° C., stretching was performed 3 times to obtain a polypropylene fiber of 5 denier. The spinnability, the clogging property, and the stretchability exhibited good dispersibility without problems.

Compound 1 is a compound shown in Table 1. Comparative Example 1 A masterbatch was obtained in the same manner as in Example 1 except that polyethylene wax “Sun Wax 151P” (manufactured by Sanyo Chemical Industry Co., Ltd.) was used in place of the compound used in Example 1. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. 100 parts by weight of the polypropylene used in Example 1 were mixed with 3 parts of the obtained masterbatch to prepare Example 1
When spinning was performed in the same manner as above, yarn breakage due to clogging occurred.

Example 2 Compound 2 30% by weight Phthalocyanine blue "Rionol Bull-7110V" (manufactured by Toyo Ink Mfg. Co., Ltd.) 50% by weight Polypropylene "Mitsui Noblen J4HG" (Mitsui Petrochemical Co., Ltd., MFR: 30) 20 wt% A masterbatch was obtained using the above three components in the same manner as in Example 1. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. The obtained masterbatch was spun in the same manner as in Example 1 to obtain polypropylene fiber. The spinnability, the clogging property, and the stretchability exhibited good dispersibility without problems.

Compound 2 is a compound shown in Table 1. [Comparative Example 2] A masterbatch was obtained in the same manner as in Example 2 except that propylene wax "Viscole 660P" (manufactured by Sanyo Kasei Co., Ltd.) was used instead of the compound used in Example 2. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. Using the obtained masterbatch, spinning was performed in the same manner as in Example 1, but intentional breakage due to clogging occurred. [Example 3] Compound 3 10% by weight Phthalocyanine blue "Rionol Bull-7110V" (manufactured by Toyo Ink Mfg. Co., Ltd.) 50% by weight Copolyester "Byron GM900" (manufactured by Toyobo Co., Ltd., MFR: 2) 10% by weight % Polyethylene terephthalate "Unipet RT543" (manufactured by Nippon Unipet Co., Ltd., MFR: 0.5) 28% by weight Partially saponified montanic acid "LuwaxOP" (manufactured by BASF Corp., saponification value: 150 mgKOH / g) 2% by weight In the same manner as in Example 1 except that the above 5 components were used, a masterbatch was obtained. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. Vertical test spinning used in Example 1 by mixing 100 parts by weight of polyethylene terephthalate "Unipet RT543" (manufactured by Nippon Unipet Co., Ltd., MFR: 0.5) with 3 parts of the obtained masterbatch. After being spun at 230 ° C. in a hopper under a hopper, at a kneading part and a die part at 230 ° C., and then stretched 4 times, a heat treatment was performed at 140 ° C. to obtain a polyester fiber of 3 denier. The spinnability, the clogging property, and the stretchability exhibited good dispersibility without problems. Intrinsic viscosity of polyethylene terephthalate without masterbatch 0.832 dl / g
The intrinsic viscosity of the fiber obtained was 0.811 dl / g
And the intrinsic viscosity retention was 97.5%.

Compound 3 is a compound shown in Table 1. [Comparative Example 3] A masterbatch was obtained in the same manner as in Example 3 except that the copolyester "Vylon GM900" was used in place of the compound 3 used in Example 3. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. The intrinsic viscosity of the fiber obtained was 0.549 dl / g, while the intrinsic viscosity of polyethylene terephthalate without masterbatch was 0.874 dl / g.
The intrinsic viscosity retention rate was 62.8%. When the obtained masterbatch was used for spinning in the same manner as in Example 3, yarn breakage due to clogging occurred.

[Example 4] Compound 4 15% by weight Phthalocyanine blue "Rionol Bull-7110V" (manufactured by Toyo Ink Mfg. Co., Ltd.) 50% by weight nylon 6 "Unitika Nylon A1020" (manufactured by Unitika Co., Ltd., MFR: 20) 10% by weight Nylon 6 "Unitika Nylon A1030BRL" (manufactured by Unitika Ltd., MFR: 1) 25% by weight The above four components were treated in the same manner as in Example 1 to obtain a masterbatch. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. Nylon 6
Example 3 was prepared by mixing 100 parts by weight of "Unitika Nylon A1030BRL" with 3 parts of the obtained masterbatch.
In the same manner as described above, 3 denier nylon fiber was obtained. The spinnability, the clogging property, and the stretchability exhibited good dispersibility without problems.

Compound 4 is a compound shown in Table 1. Comparative Example 4 A masterbatch was obtained in the same manner as in Example 4 except that Nylon 6 “Unitika Nylon A1020” was used instead of the compound used in Example 4. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. When the obtained masterbatch was used for spinning in the same manner as in Example 4, yarn breakage due to clogging occurred. In order to evaluate the clogging property of the undispersed pigment, 10 parts of each of the master batches obtained in Examples 1 and 2 and Comparative Examples 1 and 2 were added to 100 parts by weight of polypropylene “Mitsui Noblen J4HG”, and Example 3 and 10 parts of each of the master batches obtained in Comparative Example 3 were each treated with polyethylene terephthalate "Unipet RT543" 100
10 parts of each of the master batches obtained in Example 4 and Comparative Example 4 were mixed with parts by weight of Nylon 6 “Unitika Nylon A1030BRL”, and a single-screw extrusion with a screw diameter of 30 mm equipped with a wire mesh of 500 mesh at the tip. 3 kg of each mixture was extruded by a machine, and the pressure rise value at the tip was measured. The results are shown in Table 2.

In order to evaluate the dispersive color development of the pigment, 1 part of each of the master batches obtained in Examples 1 and 2 and Comparative Examples 1 and 2 was added to 100 parts by weight of polypropylene "Mitsui Noblen J4HG", and 1 part each of the master batches obtained in Example 3 and Comparative Example 3 was added to 100 parts by weight of polyethylene terephthalate "Unipet RT543".
One part of each of the master batches obtained in Example 4 and Comparative Example 4 was mixed with nylon 6 "Unitika Nylon A1030BRL", respectively, and titanium oxide "Taipeque CR-8" was further mixed.
A mixture of 5 parts of "0" was kneaded with a two-roll mill and molded into a plate having a thickness of 2 mm by a cooling press. Table 2 shows the results of measuring the reflection intensity at 600 nm with a color difference meter (manufactured by Hunter, USA). The reflection intensity was measured in Example 1,
The reflection intensities of 3 and 4 were expressed as 100%.

[Example 5] Compound 3 30% by weight Titanium oxide "Taipec CR-80" (manufactured by Ishihara Sangyo Co., Ltd.) 50% by weight Carbon black "Mitsubishi Carbon MA-100" (manufactured by Mitsubishi Kasei Kogyo Co., Ltd.) 5% by weight polyethylene "NUC G5391" (manufactured by Nippon Unicar Co., Ltd., MFR: 50) 15% by weight The above 4 components were treated in the same manner as in Example 1 to obtain a masterbatch. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. Polyethylene "Hi-Zex 2100J" (Mitsui Petrochemical Industry Co., Ltd.)
Manufactured, MFR: 6.5) 100 parts by weight of the obtained master batch is mixed with 3 parts, and the back pressure is 0 Kg by an injection molding machine.
Molded into plates at / cm ² .

Compound 3 is a compound shown in Table 1. Comparative Example 5 Instead of the compound used in Example 5, polyethylene wax “Sun Wax 131P” (Sanyo Kasei Co., Ltd.)
A master batch was obtained in the same manner as in Example 5, except that At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. The obtained masterbatch was molded into a plate in the same manner as in Example 5. [Example 6] Compound 4 15% by weight quinacridone red "Fastgen Super Magenta RE03" (manufactured by Dainippon Ink and Chemicals, Inc.) 45% by weight Propylene / ethylene block copolymer resin "Mitsui Noblene J740P" (Mitsui Petrochemical MFR: 25, manufactured by Kogyo Co., Ltd. 40% by weight The above three components were treated in the same manner as in Example 1 to obtain a masterbatch. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. 100 parts by weight of the polypropylene used in Example 1 was mixed with 3 parts of the obtained masterbatch, and molded into a plate in the same manner as in Example 5.

Compound 4 is the compound shown in Table 1. [Comparative Example 6] A masterbatch was obtained in the same manner as in Example 6 except that the dispersant "Solsperse 17000" (manufactured by ICI Japan Co., Ltd.) was used instead of the compound used in Example 6.
At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. The obtained masterbatch was molded into a plate in the same manner as in Example 6. [Example 7] Compound 5 10% by weight Condensed azo yellow "Chlomophthal yellow GR" (manufactured by Ciba Geigy) 50% by weight Polyethylene "Mitsubishi Polyech MV-31" (manufactured by Mitsubishi Yuka Co., Ltd., MFR: 45) 30% by weight Polyethylene wax "High Wax 420P" (manufactured by Mitsui Petrochemical Industry Co., Ltd.) 10% by weight The above four components were treated in the same manner as in Example 1 to obtain a masterbatch. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. The obtained masterbatch was molded into a plate in the same manner as in Example 6.

Compound 5 is a compound shown in Table 1. Comparative Example 7 A masterbatch was obtained in the same manner as in Example 7 except that metal soap (zinc stearate) was used instead of the compound used in Example 7. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. The obtained masterbatch was treated in the same manner as in Example 7,
Molded into plates. [Example 8] Compound 1 15% by weight Phthalocyanine blue "Rionol Bull-POBS" (manufactured by Ciba Geigy) 50% by weight Titanium oxide "Taipec CR-80" (manufactured by Ishihara Sangyo Co., Ltd.) 5% by weight ABS resin "JSR" ABS35 "(manufactured by Japan Synthetic Rubber Co., Ltd., MFR: 60) 30% by weight The above four components were treated in the same manner as in Example 1 to obtain a masterbatch. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. ABS resin "JSR ABS10" (MF, MF, manufactured by Japan Synthetic Rubber Co., Ltd.)
3 parts of the obtained masterbatch was mixed with 100 parts by weight of R: 0.5) and molded into a plate in the same manner as in Example 5.

Compound 1 is a compound shown in Table 1. [Comparative Example 8] A masterbatch was obtained in the same manner as in Example 8 except that a surfactant (sodium dodecylbenzene sulfonate) was used instead of the compound used in Example 8. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. The obtained masterbatch was molded into a plate in the same manner as in Example 8. [Example 9] Compound 2 15% by weight Titanium oxide "Taipec CR-80" (manufactured by Ishihara Sangyo Co., Ltd.) 50% by weight Carbon black "Mitsubishi Carbon MA-100" (manufactured by Mitsubishi Kasei Co., Ltd.) 5% by weight Polyamide "Versamide DPX640" (Made by Henkel White Water Co., Ltd., MFR: 120) 10% by weight Special nylon resin "Macromelt 6900" (MFR: 10, made by Henkel White Water Co., Ltd.) 20% by weight The above 5 components were used in Example 1 A masterbatch was obtained in the same manner as in. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. Special nylon resin "Macromelt 6902" (Henkel Hakusui Co., Ltd.)
Manufactured, MFR: 3) 100 parts by weight was mixed with 3 parts of the obtained masterbatch, and molded into a plate in the same manner as in Example 5.

Compound 2 is a compound shown in Table 1. [Comparative Example 9] Instead of the compound used in Example 9, a special nylon resin "Macromelt 6903" (manufactured by Henkel Hakusui Co., Ltd.,
A masterbatch was obtained in the same manner as in Example 9 except that MFR: 100) was used. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. The obtained masterbatch was molded into a plate in the same manner as in Example 9. [Example 10] Compound 5 20 wt% Condensed Azo Yellow "Chromophtal Yellow GR" (manufactured by Ciba Geigy) 20 wt% Quinacridone Red "Fastgen Super Magenta RE03" (manufactured by Dainippon Ink and Chemicals, Inc.) 25 % By weight Titanium oxide "Taipec CR-80" (manufactured by Ishihara Sangyo Co., Ltd.) 5% by weight Polystyrene resin "Styron 683" (manufactured by Asahi Chemical Industry Co., Ltd., MFR: 2.8) 15% by weight Polystyrene resin "Styron 666" (Asahi Kasei Co., Ltd., MFR: 7.5) 15% by weight The above 10 components were treated in the same manner as in Example 10 to obtain a masterbatch. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. 100 parts by weight of polystyrene resin "Stylon 683" was mixed with 3 parts of the obtained masterbatch, and molded into a plate in the same manner as in Example 5.

[Comparative Example 10] Instead of the compound used in Example 10, polystyrene wax "Haimer SB130" (manufactured by Sanyo Kasei Co., Ltd.)
A masterbatch was obtained in the same manner as in Example 10 except that it was used. At this time, a masterbatch could be obtained smoothly without strand breakage or pulsating flow. The obtained masterbatch was molded into a plate in the same manner as in Example 10. Retention of mechanical properties of the molded articles obtained in Examples 5 to 10 and Comparative Examples 5 to 10 (mechanical properties of uncolored resin <100%> relative to mechanical properties of resin colored with masterbatch) The retention rate is shown in Table 3. Table 4 shows the results of evaluation of color unevenness on the surface of the molded product. Furthermore, from the size and number of coarse particles of the pigment, the dispersity of the pigment can be determined by using Luzex 450 image processor (Toyo Ink Mfg. Co., Ltd.).
The evaluation results are shown in Table 4.

[0030]

[Table 1]

Type of oxyacid used for esterification Compound 1: 12-hydroxystearic acid Compound 2: 12-hydroxystearic acid Compound 3: 12-hydroxystearic acid Compound 4: Ricinoleic acid Compound 5: p-hydroxybenzoic acid

[0032]

[Table 2]

[0033]

[Table 3]

Retention rate of mechanical properties ○: 96% or more Δ: 90% to 96% ×: 90% or less

[0035]

[Table 4]

Color unevenness of molded product (visual judgment) ○: No color unevenness Δ: Some color unevenness ×: Marked color unevenness Masterbatch productivity (by extruder with screw diameter 65 mm) ○: Good ×: Poor pigment dispersion The kneaded product containing 100 parts by weight of the resin to be colored and 3 parts of the masterbatch was pressed under the condition of a pressing temperature of 170 ° C. to obtain a film having a thickness of 0.1 mm. The pigment dispersity of this film was evaluated according to the following 5 grades.

5: Number of particles of 50 μm or less 1.0 × 10 ³ particles / cm ² or less 4: Number of particles of 50 μm or less 1.0 × 10 ^{3 to} 7.0 × 1
0 ³ particles / cm ² 3: Number of particles of 50 μ or less 7.0 × 10 ^{3 to} 2.7 × 1
0 ⁴ particles / cm ² 2: the number of particles of 50 μ or less 2.7 × 10 ^{4 to} 7.0 × 1
0 ⁴ particles / cm ² 1: 50 μm or less particles 7.0 × 10 ⁴ particles / cm ² or more

[0038]

INDUSTRIAL APPLICABILITY The resin composition for coloring a thermoplastic resin of the present invention is excellent in pigment dispersibility and efficiently improves pigment dispersibility even though the pigment content is very high. In coloring a textile product which requires pigment dispersion, it exerts a great effect on its coloring power and processability. Further, conventionally, for the coloring of a polyolefin-based resin composition containing a high content of an inorganic filler or a fiber reinforcement in which physical properties such as mechanical properties and heat resistance, which were difficult to be uniformly colored by a masterbatch, are particularly important. However, it is extremely effective and enables coloring without color unevenness.

Continuation of the front page (56) Reference JP 62-119238 (JP, A) JP 4-298572 (JP, A) JP 3-177468 (JP, A) JP 4-16231 (JP , A) JP-A-6-211990 (JP, A) JP-A-7-53772 (JP, A) Color Material Association, Color Material Engineering Handbook, Asakura Shoten, November 25, 1989, first edition 1st edition, p418-420 Hiroshi Horiguchi, New surfactant, Sankyo Publishing Co., Ltd., February 15, 1993, 5th edition of the first edition, p612-638 (58) Fields investigated (Int.Cl. ⁷ , DB name) ) C09D 17/00 C08L 71/02 C08L 101/00

Claims (5)

(57) [Claims] 1. A pigment (a) 1 to 90% by weight, a thermoplastic resin (b) 1 to 90% by weight, an esterified product (c) 1 of an oxyacid and an alkylene oxide adduct of a long-chain alkyl primary alcohol. ~ 80 wt% for thermoplastic resin coloring
A resin composition, wherein the oxy acid is ricinoleic acid, 12-hydroxy steari
Acid or p-hydroxybenzoic acid oxyacid
Ri, long-chain alkyl primary alcohol alkylene oxide
A resin composition for coloring a thermoplastic resin, wherein the adduct is represented by the following general formula (I) . General formula (I) (However, R is H or CH ₃ , and n is an integer of 20 or more.
The number and m are integers from 1 to 16. ) 2. An esterified product (c) of an oxy acid and an alkylene oxide adduct of a long-chain alkyl primary alcohol.
The oxy acid in the above is 12-hydroxystearic acid, The coloring resin composition according to claim 1. 3. The coloring resin composition according to claim 1 or 2, wherein the thermoplastic resin (b) is a polyolefin resin having a melt flow rate in the range of 0.1 to 400. 4. The thermoplastic resin (b) is a polypropylene resin.
The coloring resin set according to claim 3, wherein
A product. 5. The coloring resin according to claim 1.
A molded product obtained by using the composition.