JP2000302986A - Colored synthetic resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject colored synthetic resin composition that can give formed products excellent processing stability, strength and shrinkage resistance after processing with reduced deformation of the molded products by using a crystalline polymer compound, a specific nucleating agent, pigments and a specific pigment dispersant. SOLUTION: The objective composition comprises (A) a crystalline polymer compound, preferably a crystalline polyolefin polymer in an amount of 100 pts.wt., (B) a nucleating agent of a compound of formula I (R1 and R2 are each a 1-8C alkyl; n is 1, 2; M is an alkali metal in the case of n=1, and is an alkaline earth metal or hydroxy-aluminum in the case n=2) for example, a compound of formula II in an amount of 0.005-5 pts.wt., preferably 0.01-3 pts.wt.; (C) a pigment, preferably iron oxide, azo or phthalocyanine and other pigment in an amount of 0.02-20 pts.wt., preferably 0.1-15 pts.wt.; and (D) a pigment dispersant of a metal salt of a 8-30C alkyl-bearing mono- or dialkyl phosphate in an amount of 0.005-5 pts.wt., preferably 0.01-3 pts.wt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a colored synthetic resin composition using a pigment as a coloring agent, and more particularly to a colored synthetic resin composition having improved processability, strength, and the like.

[0002]

2. Description of the Related Art Crystalline high molecular compounds such as polyethylene, polypropylene, polybutene-1, polyethylene terephthalate, and polyamide have a low crystallization rate after heat molding, so that the molding cycle during processing is low. However, there is a problem that the molding temperature is long, the mold temperature must be lowered, and the molded product may be deformed due to crystallization that proceeds even after molding. In addition, these crystalline high-molecular compound materials have disadvantages of insufficient strength and poor transparency due to generation of large crystals.

[0003] These disadvantages are derived from the crystallinity of the crystalline polymer compound, and it is known that these defects can be eliminated by rapidly generating fine crystals. At present, a method of increasing the crystallization temperature and adding a nucleating agent, a crystallization accelerator or the like is used to rapidly generate fine crystals.

The above-mentioned nucleating agent or crystallization accelerator includes:
For example, metal salts of carboxylic acids such as aluminum 4-tert-butylbenzoate and sodium adipate, sodium bis (4-tert-butylphenyl) phosphate, sodium-2,2′-methylenebis (4,6-ditert-butyl) Acid phosphate metal salts such as butylphenyl) phosphate,
Polyhydric alcohol derivatives such as dibenzylidene sorbitol and bis (methylbenzylidene) sorbitol have been used. Among these compounds, JP-A-58-17
No. 36, JP-A-59-184252, and the like, metal salts of cyclic phosphates of alkylidene bisphenols have been particularly widely used because of their particular effects.

However, the effects of these compounds were sometimes insufficient. Further, in the case of a colored synthetic resin composition containing a pigment, a pigment dispersant is used to prevent color unevenness after molding.However, when a metal salt of a carboxylic acid generally used as a pigment dispersant is used, In some cases, the effect of the nucleating agent or crystallization accelerator was significantly reduced.

Accordingly, it is an object of the present invention to provide a colored synthetic resin composition which can impart excellent processing stability, strength, and shrink resistance after processing, and in which a molded product is hardly deformed.

[0007]

Means for Solving the Problems As a result of repeated studies, the present inventors have found that a specific phosphate ester compound as a crystal nucleating agent and a specific phosphoric acid ester compound as a pigment dispersant are added to a pigmented synthetic resin composition. It has been found that the above object can be achieved by using an alkyl phosphate metal salt.

[0008] The present invention has been made based on the above-mentioned findings.
In the colored synthetic resin composition obtained by blending the compound represented by the general formula (I) of the above [Chemical Formula 1], a pigment and a pigment dispersant, the pigment dispersant has 8 to 30 carbon atoms. Disclosed is a colored synthetic resin composition, which is a metal salt of a mono- or di-alkyl phosphate having an alkyl group.

[0009]

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Hereinafter, the colored synthetic resin composition of the present invention will be described in detail.

The compound represented by the general formula (I) used in the colored synthetic resin composition of the present invention is used as a crystal nucleating agent. In the general formula (I), R ₁ and R ₂
As the alkyl group having 1 to 8 carbon atoms represented by, for example, methyl, ethyl, propyl, isopropyl, butyl, sec-butyl, tert-butyl, isobutyl, amyl, tertiary amyl, hexyl, heptyl, octyl, Isooctyl, tertiary octyl, 2-ethylhexyl, and the like,
Examples of the alkali metal represented by M include sodium, potassium, lithium and the like, and examples of the alkaline earth metal include magnesium, calcium, strontium, barium and the like.

Specific examples of the compound represented by the general formula (I) include the following compound No. 1 to 6 and the like. However, the present invention is not limited at all by the following exemplified compounds.

[0013]

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[0014]

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[0015]

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[0016]

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[0017]

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[0018]

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The compound represented by the above general formula (I) is obtained, for example, by reacting phosphorus trichloride with a 2,2'-methylenebisphenol derivative, and then hydrolyzing it to form a cyclic acidic phosphoric acid ester. It is produced by reacting with a metal hydroxide such as sodium. The compound represented by the above general formula (I) thus obtained is further filtered,
After drying, if necessary, this is pulverized and used as a crystal nucleating agent.

The amount of the compound represented by the above general formula (I) is 0.1 to 100 parts by weight of the crystalline polymer compound.
If the amount is less than 005 parts by weight, the effect cannot be obtained.
0.005 to 5 parts by weight is preferable, and 0.01 to 3 parts by weight is more preferable.

Examples of the crystalline polymer compound used in the colored synthetic resin compound of the present invention include (1) low-density polyethylene, linear low-density polyethylene, high-density polyethylene, polypropylene, polybutene-1, and poly-3. −
Α-olefin polymers such as methylbutene, ethylene / propylene block or random copolymer, (2) polyethylene terephthalate, polybutylene terephthalate,
Examples include thermoplastic linear polyesters such as polyhexamethylene terephthalate, and (3) linear polyamides such as polyphenylene sulfide, polycaprolactone, and polyhexamethylene adipamide.

As the crystalline polymer compound, in particular,
Polyolefin-based polymer compounds are preferred, and crystalline α
Olefin polymers, polypropylene, ethylene / propylene copolymers and these propylene polymers and other α
-Polypropylene resins, such as mixtures with olefin polymers, are particularly preferred.

The crystalline polymer compound has a molecular weight, a molecular weight distribution, a melt flow index, a ratio of an insoluble component in a solvent such as hexane, a stereoregularity, for example, a pentad fraction of isotactic and a triad of syndiotactic. It can be used irrespective of the degree of the fraction, the type of catalyst used for the polymerization of the Ziegler-Natta catalyst or the metallocene catalyst, and the presence or absence of a catalyst removal step. For example, JP-A-63-37148 and JP-A-63-37148. No. 37152,
JP-A-63-90552, JP-A-63-210152, JP-A-63-213547, and JP-A-63-24315
No. 0, 63-243152, 63-26
0943, 63-260944, 63
-264650, JP-A-1-178541, JP-A-2-49047, JP-A-2-102242, JP-A-2-251548, JP-A-2-279746, JP-A-3-195755 and the like. It can also be suitably used for the described polypropylene resins.

The pigment used in the colored synthetic resin composition of the present invention includes iron oxide pigments, titanium pigments, blue and green inorganic pigments, carbon pigments, azo pigments, phthalocyanine pigments, condensed polycyclic pigments and the like. No. Examples of iron oxide-based pigments include iron black, red iron oxide, zinc ferrite pigments, and the like.Examples of titanium-based pigments include titanium oxide, nickel antimony titanium yellow, and chromium antimony titanium yellow. Examples of the pigment include ultramarine, cobalt blue, chromium oxide, and spinel green. Examples of the azo pigment include lake red C, watching red, and brilliant carmine 6B.
Azo lake pigments, such as Hosta Palm Yellow H4G, Nova Palm Yellow H2G, Nova Palm Red HFT, P
V Fast Yellow HG, PV Fast Yellow H3
R, PV Bordeaux HF3R, PV Carmine HF4C, P
V Red HF2B, PV Fast Maroon HMF01,
Benzimidazolone pigments such as PV Fast Brown HFR, diarilide yellow, diarilide orange, pyrazolone red, diarylide pigments such as PV Fast Yellow HR, Chromophthal Yellow 8GN, Chromophthal Yellow 6G, Chromophthal Yellow 3G, Chromophthal Condensed azo pigments such as Yellow GR, Chromophthal Orange 4R, Chromophthal Orange GP, Chromophthal Scarlet RN, Chromophthal Red G, Chromophthal Red BRN, Chromophthal Red BG, Chromophthal Red 2B, Chromophthal Brown 5R, etc. No. Examples of the phthalocyanine pigments include phthalocyanine blue and phthalocyanine green, and the condensed polycyclic pigments include quinacridone pigments such as PV Fast Pink E, Shinkasha Red B, and Shinkasha Red Y;
Irgazin Yellow 2GLT, Irgazin Yellow 3R
Isoindolinone pigments such as LTN and Chromophthal Orange 2G; perylene pigments such as perylene red, perylene maroon and perylene scarlet; perinone pigments such as perinone orange; dioxazine pigments such as dioxazine violet; Filesta Yellow RN And anthraquinone pigments such as Chromophtal Red A3B and Slen Blue, and quinophthalone pigments such as Palio Tol Yellow L0960HG.

Of the above-mentioned pigments, iron oxide pigments, azo pigments and phthalocyanine pigments are preferred because the effect of the pigment dispersant according to the present invention is most noticeable.

If the amount of the pigment is less than 0.02 parts by weight based on 100 parts by weight of the crystalline polymer compound, the pigment is hardly colored, and if it exceeds 20 parts by weight, the physical properties of the resin composition may be significantly reduced. Therefore, 0.02 to 20 parts by weight is preferable, and 0.1 to 15 parts by weight is more preferable.

The metal salt of a mono- or di-alkyl phosphate having an alkyl group having 8 to 30 carbon atoms, which is used as a pigment dispersant according to the present invention, refers to two or one non-esterified phosphate residue. And a metal, and the alkyl group includes, for example, n-octyl, isooctyl, tertiary octyl, 2-ethylhexyl, nonyl, isononyl, decyl, dodecyl, lauryl, tridecyl, myristyl, pentadecyl, Palmityl, peptadecyl, stearyl, nonadecyl, eicosyl, docosyl, tricosyl, tetracosyl, pentacosyl, hexacosyl, heptacosyl, octacosyl, nonacosyl, triacontyl, and the like are mentioned. You. The metal forming the alkyl phosphate metal salt is not particularly limited, but the use of magnesium or zinc not only has a high effect on the dispersibility of the pigment but also is represented by the general formula (I). This is preferable because it hardly impairs the effect of the compound (crystal nucleating agent) and provides excellent processing stability, strength, and shrink resistance after processing.

The above metal salts of mono- or dialkyl phosphates may be used alone or as a mixture of two or more kinds. The amount of the metal salt is 0.005 parts by weight based on 100 parts by weight of the crystalline polymer compound. When the amount is less than 5 parts by weight, the effect of addition is not confirmed, and when the amount exceeds 5 parts by weight, there is a possibility that the addition effect may not be improved.
01 to 3 parts by weight is more preferred.

In order to impart further stabilization to the colored synthetic resin composition of the present invention, if necessary, additives such as general-purpose antioxidants, ultraviolet absorbers, hindered amine light stabilizers and the like are added. be able to.

Particularly preferable examples of these additives include phenol-based, sulfur-based, phosphorus-based antioxidants, ultraviolet absorbers, and hindered amine light stabilizers.

The phenolic antioxidants include, for example, 2,6-di-tert-butyl-p-cresol, 2,6
-Diphenyl-4-octadecyloxyphenol, stearyl (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, distearyl (3,5-di-tert-butyl-4-hydroxybenzyl) phosphonate, thiodiethylene glycol bis [(3,5-di-tert-butyl-4
-Hydroxyphenyl) propionate], 1,6-hexamethylenebis [(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 1,6-hexamethylenebis [(3,5-di-tert-butyl) -4-hydroxyphenyl) propionamide], 4,4'-thiobis
(6-tert-butyl-m-cresol), 2,2'-methylenebis (4-methyl-6-tert-butylphenol),
2,2'-methylenebis (4-ethyl-6-tert-butylphenol), bis [3,3-bis (4-hydroxy-3
-Tert-butylphenyl) butylic acid] glycol ester, 4,4'-butylidenebis (6-tert-butyl-m-cresol), 2,2'-ethylidenebis (4,6-di-tert-butylphenol), , 2'-ethylidenebis (4-sec-butyl-6-tert-butylphenol), 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, bis [2-tert-butyl Tributyl-4-methyl-6- (2-hydroxy-3-tert-butyl-5-methylbenzyl) phenyl] terephthalate, 1,3,5-tris (2,6-dimethyl-3-hydroxy-4-tert. Tributylbenzyl) isocyanurate,
1,3,5-tris (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, 1,3,5-tris (3,5-di-tert-butyl-4-hydroxybenzyl)
-2,4,6-trimethylbenzene, 1,3,5-
[(3,5-di-tert-butyl-4-hydroxyphenyl)
Propionyloxyethyl] isocyanurate, tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionyloxymethyl] methane, 2-tert-butyl-4-methyl-6- (2-acryloyloxy-
3-tert-butyl-5-methylbenzyl) phenol,
3,9-bis [1,1-dimethyl-2-{(3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy} ethyl] 2,4,8,10-tetraoxaspiro [5. 5] undecane, triethylene glycol bis [(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate] and the like.

The sulfur-based antioxidants include, for example,
Examples thereof include dialkylthiodipropionates such as dilauryl thiodipropionate, dimyristyl, and distearyl, and β-alkyl mercaptopropionates of polyols such as pentaerythritol tetra (β-dodecylmercaptopropionate).

Examples of the phosphorus-based antioxidants include:
Tris nonylphenyl phosphite, tris (2,4-
Di-tert-butylphenyl) phosphite, tris [2-tert-butyl-4- (3-tert-butyl-4-hydroxy-5
-Methylphenylthio) -5-methylphenyl] phosphite, tridecyl phosphite, octyl diphenyl phosphite, di (decyl) monophenyl phosphite, di (tridecyl) pentaerythritol diphosphite, distearyl pentaerythritol diphosphite Di (nonylphenyl) pentaerythritol diphosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite Phyt, bis (2,4,6-tri-tert-butylphenyl) pentaerythritol diphosphite, 2,
2'-methylenebis (4,6-di-tert-butylphenyl)
-2-ethylhexyl phosphite, 2,2'-methylenebis (4,6-di-tert-butylphenyl) -2-octadecylphosphite, 2,2'-ethylidenebis (4
6-di-tert-butylphenyl) fluorophosphite, tetra (tridecyl) isopropylidenediphenol diphosphite, tetra (tridecyl) -4,4′-n-butylidenebis (2-tert-butyl-5-methylphenol) diphosphite , Hexa (tridecyl) -1,1,
3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butanetriphosphite, tetrakis (2,4-di-tert-butylphenyl) biphenylenediphosphonite, 9,10-dihydro-9-oxa- 10-
Phosphaphenanthrene-10-oxide, tris (2-[(2,4,8,10-tetrakis-tert-butyldibenzo [d, f] [1,3,2] dioxaphosphepin-6-oxy Ethyl) amine, 2,2-bis (4-
[(2,4,8,10-tetrakis-tert-butylbenzo [d, f] [1,3,2] dioxaphosphepin-6
-Yl) oxy] phenyl) propane; and bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, bis (2,6-di-tert-butyl-4-methylphenyl) pentane Melting point 40 ° C. of erythritol diphosphite, 2,2′-methylenebis (4,6-di-tert-butylphenyl) -2-ethylhexyl phosphite, tetrakis (2,4-di-tert-butylphenyl) biphenylenediphosphonite, etc. The above are preferred because they have little effect on the softening point and the like of the resin.

As the above-mentioned ultraviolet absorber, for example,
4-dihydroxybenzophenone, 2-hydroxy-4
-Methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 5,5'-methylenebis (2-
2-hydroxybenzophenones such as hydroxy-4-methoxybenzophenone; 2- (2-hydroxy-5-
Methylphenyl) benzotriazole, 2- (2-hydroxy-5-tert-octylphenyl) benzotriazole, 2- (2-hydroxy-3,5-ditert-butylphenyl) -5-chlorobenzotriazole, 2- ( 2-hydroxy-3-tert-butyl-5-methylphenyl) -5
-Chlorobenzotriazole, 2- (2-hydroxy-
3,5-dicumylphenyl) benzotriazole, 2,
2'-methylenebis (4-tert-octyl-6-benzotriazole) phenol, 2- (2-hydroxy-3-
2- (2-tert-butyl-5-carboxyphenyl) benzotriazole such as polyethylene glycol ester
Hydroxyphenyl) benzotriazoles; phenyl salicylate, resorcinol monobenzoate, 2,
4-di-tert-butylphenyl-3,5-di-tert-butyl-4
Benzoates such as -hydroxybenzoate, hexadecyl-3,5-ditert-butyl-4-hydroxybenzoate; 2-ethyl-2'-ethoxyoxanilide, 2
Substituted oxanilides such as -ethoxy-4'-dodecyloxanilide; ethyl-α-cyano-β, β-diphenylacrylate, methyl-2-cyano-3-methyl-3-
And cyanoacrylates such as (p-methoxyphenyl) acrylate.

Examples of the hindered amine light stabilizer include 2,2,6,6-tetramethyl-4-piperidyl stearate, 1,2,2,6,6-pentamethyl-4-piperidyl stearate, , 2,6,6-tetramethyl-4-piperidylbenzoate, bis (2,
2,6,6-tetramethyl-4-piperidyl) sebacate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, bis (1-octoxy-2,
2,6,6-tetramethyl-4-piperidyl) sebacate, tetrakis (2,2,6,6-tetramethyl-4-)
Piperidyl) -1,2,3,4-butanetetracarboxylate, tetrakis (1,2,2,6,6-pentamethyl-4-piperidyl) -1,2,3,4-butanetetracarboxylate, bis ( 2,2,6,6-tetramethyl-4-piperidyl) .bis (tridecyl) -1,
2,3,4-butanetetracarboxylate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) bis (tridecyl) -1,2,3,4-butanetetracarboxylate, bis ( 1,2,2,6,6-pentamethyl-4-piperidyl) -2-butyl-2-
(3,5-di-tert-butyl-4-hydroxybenzyl) malonate, 1- (2-hydroxyethyl) -2,2,
6,6-tetramethyl-4-piperidinol / diethyl succinate polycondensate, 1,6-bis (2,2,6,6-tetramethyl-4-piperidylamino) hexane / dibromoethane polycondensate, 1, 6-bis (2,2,6,6-tetramethyl-4-piperidylamino) hexane / 2,4
-Dichloro-6-morpholino-s-triazine polycondensate, 1,6-bis (2,2,6,6-tetramethyl-4
-Piperidylamino) hexane / 2,4-dichloro-6
Tertiary octylamino-s-triazine polycondensate, 1,
5,8,12-tetrakis [2,4-bis (N-butyl-N- (2,2,6,6-tetramethyl-4-piperidyl) amino) -s-triazin-6-yl] -1, 5,
8,12-tetraazadodecane, 1,5,8,12-tetrakis [2,4-bis (N-butyl-N- (1,2,2
2,6,6-pentamethyl-4-piperidyl) amino)
-S-triazin-6-yl] -1,5,8,12-tetraazadodecane, 1,6,11-tris [2,4-bis (N-butyl-N- (2,2,6,6 -Tetramethyl-4-piperidyl) amino-s-triazin-6-ylamino] undecane, 1,6,11-tris [2,4-
Bis (N-butyl-N- (1,2,2,6,6-pentamethyl-4-piperidyl) amino-s-triazine-6
-Ylamino] undecane, 3,9-bis [1,1-dimethyl-2- {tris (2,2,6,6-tetramethyl-4-piperidyloxycarbonyloxy) butylcarbonyloxy} ethyl] -2,4 , 8,10-Tetraoxaspiro [5.5] undecane, 3,9-bis [1,
1-dimethyl-2- {tris (1,2,2,6,6-pentamethyl-4-piperidyloxycarbonyloxy)
Butylcarbonyloxydiethyl] -2,4,8,10
-Tetraoxaspiro [5.5] undecane and the like.

If necessary, the colored synthetic resin composition of the present invention may contain a heavy metal deactivator, aluminum pt-butyl benzoate, dibenzylidene sorbitol, metal soap, hydrotalcite, nonionic surfactant Agents, cationic surfactants, anionic surfactants, antistatic agents composed of amphoteric surfactants, flame retardants such as halogen-based, phosphorus-based or metal oxides, lubricants such as ethylenebisalkylamide, processing aids , Fillers and the like.

The method of molding the colored synthetic resin composition of the present invention is not particularly limited, and commonly used methods such as injection molding, calendar molding, press molding, and extrusion molding can be used.

Molded articles obtained by processing the colored synthetic resin composition of the present invention include resin parts for automobiles such as bumpers, dashboards, instrument panels, resin parts for home appliances such as refrigerators, washing machines, vacuum cleaners, tableware, Household goods such as buckets and bathing goods, miscellaneous goods such as toys, storage and preservation containers such as tanks and the like are included.

EXAMPLES Hereinafter, the present invention will be described specifically with reference to Examples, but the present invention is not limited to the following Examples.

Example 1 100 parts by weight of polypropylene ("Profax6501" manufactured by Montell) and 0.05 parts by weight of tetrakis [methylene-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] methane 0.05 parts by weight of tris (2,4-di-tert-butylphenyl) phosphite, 0.1 part by weight of a nucleating agent shown in Table 1, 2 parts by weight of a pigment shown in Table 1, and a pigment dispersant shown in Table 1 The following evaluation was performed about the coloring synthetic resin composition which consists of 0.3 weight part. Using an in-line injection molding machine (cylinder temperature 230 ° C.), the above composition was prepared to have a thickness of 1.8 m.
Using a mold for a disk-shaped molded product having a diameter of 100 mm and a diameter of 100 mm, injection molding was performed at a mold temperature of 60 ° C. to obtain a test piece. After leaving this test piece at room temperature for 24 hours, the maximum warpage was measured based on JIS K6911, and AS was used to check the rigidity.
The flexural modulus was measured based on TMD-747-63. Table 1 shows the results. In Table 1, those using the pigment dispersant 1 or 2 as the pigment dispersant are examples, those using the comparative compound 1 or 2 as the pigment dispersant, and those using the pigment dispersant. Those not shown are comparative examples (the same applies to Tables 2 to 4).

[0040]

[Table 1]

(Example 2) 100 parts by weight of polypropylene ("Profax6501" manufactured by Montell) and 0.05 parts by weight of tetrakis [methylene-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] methane 0.05 parts by weight of tris (2,4-ditert-butylphenyl) phosphite, 0.05 parts by weight of lithium myristate, 0.1 part by weight of a nucleating agent shown in Table 2, and 2 parts by weight of a pigment shown in Table 2 The following evaluation was performed with respect to a colored synthetic resin composition comprising 0.3 parts by weight of the pigment dispersant shown in Table 2 in Table 2. Using this composition, a test piece was prepared in the same manner as in Example 1, and the maximum warpage and flexural modulus were measured. Table 2 shows the results.

[0042]

[Table 2]

Example 3 100 parts by weight of high-density polyethylene ("HIZEX" manufactured by Mitsui Petrochemical Co., Ltd.), 0.3 part by weight of distearyl thiodipropionate, tetrakis [methylene-3- (3,5- 0.1 part by weight of di-tert-butyl-4-hydroxyphenyl) propionate] methane, 0.1 part by weight of a nucleating agent shown in Table 3, 2 parts by weight of pigment shown in Table 3, and 0.1 part by weight of pigment dispersant shown in Table 3. The following evaluation was performed on the colored synthetic resin composition consisting of 3 parts by weight. Using this composition, a test piece was prepared in the same manner as in Example 1, and the maximum warpage and flexural modulus were measured. Table 3 shows the results.

[0044]

[Table 3]

Example 4 100 parts by weight of polypropylene ("Profax6501" manufactured by Montell) and 0.15 parts by weight of tetrakis [methylene-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] methane 0.1 parts by weight of tris (2,4-di-tert-butylphenyl) phosphite, 0.1 part by weight of a crystal nucleating agent shown in Table 2,
2 parts by weight of the pigment shown in Table 2 and 0.3 of the pigment dispersant shown in Table 2
The following evaluation was performed on the colored synthetic resin composition composed of parts by weight. The MFI (melt flow index) of the above composition was measured based on JIS K7210. Using this composition, roll kneading was performed at 180 ° C. for 10 minutes, followed by press molding at 180 ° C. for 10 minutes to prepare a predetermined test piece, and the flexural modulus was measured. Table 4 shows the results.

[0046]

[Table 4]

[0047]

The colored synthetic resin composition of the present invention has good processability irrespective of the kind of the coloring agent contained,
A colored synthetic resin molded article having excellent strength can be provided.

Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) C08K 5/527 C08K 5/527 C08L 23/00 C08L 23/00 C09B 67/20 C09B 67/20 G K F // C07F 9/6574 C07F 9/6574 Z (72) Inventor Takashi Takeuchi 5-2-13-Shirahata, Urawa-shi, Saitama F-term in Asahi Denka Kogyo Co., Ltd. 4H050 AB48 4J002 AA001 BB001 BB031 BB121 BB151 BB171 BP021 CF051 CF061 CF071 CF191 CL031 CN011 DE097 DE117 DE137 EA067 EE057 EQ017 EU027 EU057 EU117 EU237 EW046 FD040 FD050 FD070 FD097 FD206 GC00 GG01 GN00 GQ00

Claims (4)

[Claims] 1. A colored synthetic resin composition comprising a crystalline polymer compound, a compound represented by the following general formula (I) as a crystal nucleating agent, a pigment and a pigment dispersant: A colored synthetic resin composition, wherein the pigment dispersant is a metal salt of a mono- or dialkyl phosphate having an alkyl group having 8 to 30 carbon atoms. Embedded image 2. The colored synthetic resin composition according to claim 1, wherein the crystalline polymer compound is a polyolefin polymer compound. 3. The colored synthetic resin composition according to claim 1, wherein the metal salt as the pigment dispersant is a magnesium salt or a zinc salt. 4. The colored synthetic resin composition according to claim 1, wherein the pigment is at least one selected from iron oxide pigments, azo pigments, and phthalocyanine pigments.