JP2000169729A - Flame-retardant resin composition and method for producing the same - Google Patents

Abstract

(57) [Summary] [Problem] No problem of environmental pollution, good dispersibility, excellent productivity, little decrease in mechanical strength, etc., and no scattered matter such as expanded graphite during combustion. To provide a resin composition having stable color tone, heat resistance, high flame retardancy and light resistance, high fluidity, and suitable for injection molding. SOLUTION: (A) 50 to 90 parts by weight of a thermoplastic resin and (B) 10 to 50 parts of a sulfate of an aminotriazine compound.
Parts by weight, and the composition was 0.5 mm × 10 cm × 10
cm of a sheet having a maximum area of 0.05 mm ² or more and having no more than 5 white agglomerates when formed into a sheet, and a highly homogeneous flame-retardant resin composition, and a water content of the composition. This is a method of producing by using 0.5% by weight or less of an aminotriazine compound.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flame-retardant resin composition and a method for producing the same, and more particularly, to an exterior part or an internal part (connector) requiring flame retardance, such as a home electric appliance and an automobile. The present invention relates to a non-halogen flame-retardant resin composition commonly used as a thermoplastic resin, such as an exterior material for buildings, and an efficient production method thereof.

[0002]

2. Description of the Related Art Conventionally, polyolefin, polystyrene,
Synthetic resins such as polyamides, polyesters, polyethers, polycarbonates, phenolic resins and epoxy resins have been used in a wide range of fields as molding materials, taking advantage of their excellent properties. However, since these resins are all flammable, fire safety, that is, flame retardancy is often required for use as an industrial material. As a method of making a thermoplastic resin flame-retardant, a method of blending a flame retardant with the resin is generally used. Examples of the flame retardant include glass, graphite, metal oxides, phosphorus-based flame retardants, and nitrogen-based flame retardants. Although there are various types, halogen-based flame retardants such as decabromodiphenyl oxide are widely used. However, these halogen-based flame retardants may generate substances harmful to the human body, such as dioxin and halogen gas, when burned, and may pose a problem as an environmental destructive substance. In addition, in the case of polyolefin resins, particularly with respect to polyolefin resins for injection molding, if a halogen-based flame retardant is contained, there is a problem that the corrosion of the mold and the light resistance of the product are reduced when a halogen-based flame retardant is contained. In order to improve the above-mentioned disadvantages of halogen-based flame retardants, non-halogenation of flame retardants for polyolefins has been proposed. For example, JP-A-8-48812 discloses a flame-retardant resin composition in which a sulfate of a triazine compound is blended with a thermoplastic resin. However, this composition has insufficient flame retardancy to be used as an industrial material and lacks self-extinguishing properties. Further, JP-A-8-81583 discloses a flame-retardant resin composition in which a sulfate of a triazine compound and thermally expandable graphite are blended in a thermoplastic resin. However, although this composition has sufficient flame retardancy, it contains heat-expandable graphite, so that there is a problem that the graphite expands and scatters during combustion. Further, since the heat-expandable graphite itself is colored, the composition becomes black, and it is difficult to adjust the color of the product. Further, Japanese Patent Application Laid-Open No. 8-231517 discloses a method for producing a sulfate composition of an aminotriazine compound useful as a flame retardant. However, the thermoplastic resin containing the aminotriazine compound sulfate composition still has insufficient flame retardancy to be used as an industrial material.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and has mechanical properties equal to or higher than those obtained when a conventional halogen-based flame retardant is used.
Shows high flame retardancy, is suitable for injection molding, is effective for environmental protection, has low odor during granulation and processing, is easy to color, has excellent light resistance, and has heat resistance And a method for producing the same.

[0004]

Means for Solving the Problems Accordingly, the present inventors have conducted intensive studies in order to achieve the above-mentioned object, and as a result, a sulfate of an aminotriazine compound having a low water content is blended in a thermoplastic resin at a specific ratio. It has been found that the above object can be achieved by the composition as described above. The present invention has been completed based on such findings. That is, the present invention
A flame-retardant resin composition containing (A) a thermoplastic resin and (B) a sulfate of an aminotriazine compound, wherein the composition is formed into a sheet of 0.5 mm × 10 cm × 10 cm. An object of the present invention is to provide a homogeneous flame-retardant resin composition, wherein the number of white agglomerates having a maximum cross-sectional area of 0.05 mm ² or more is 5 or less. Further, in the present invention, when the above components (A) and (B) are blended to produce this homogeneous flame-retardant resin composition, the aminotriazine having a water content of 0.5% by weight or less as the component (B) is used. Also provided is a method of using a sulfate of the compound.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The thermoplastic resin of component (A), which is the main raw material of the flame-retardant resin composition of the present invention, is not particularly limited, and a known thermoplastic resin can be used. For example, polyolefin resins such as polyethylene, polypropylene, polybutene, polybutadiene and block polymers thereof,
Polystyrene resins such as styrene-butadiene polymer and styrene-butadiene-styrene block polymer;
Polyamide-based resins, polyether-based resins, polycarbonate-based resins, and the like can be used, and polyolefin-based resins can be suitably used. Among them, polypropylene resins, homopolypropylene resins, ethylene-propylene copolymers, and ethylene-propylene block copolymers are particularly preferable. Polymers are preferred. However, when the polyethylene component is increased, the flame retardant performance may decrease. Therefore, in some cases, the flame retardant performance of the polyethylene resin alone may be less than a predetermined value (V).
-2) is not reached. The thermoplastic resin as the component (A) has a melt index (hereinafter abbreviated as MI) of 7 to 100 g measured at a temperature of 230 ° C. and a load of 2.16 kg.
/ 10 min polyolefin resin is suitable, preferably 8 to 50 g / 10 min, particularly preferably 10 to 30 g.
/ 10 minutes. If the MI is less than 7 g / 10 minutes, the flame retardancy may not reach V-2,
If the amount exceeds minutes, physical properties such as mechanical strength may be reduced.

The flame-retardant resin composition of the present invention comprises the component (A)
(B) component aminotriadiene
White particles of the sulfuric acid compound are uniformly dispersed
It is. Specifically, the flame-retardant resin composition of the present invention,
The composition was formed into a sheet of 0.5 mm × 10 cm × 10 cm.
When the maximum cross-sectional area existing in it is 0.05mm ^Two
It is necessary that the number of the above white aggregates is 5 or less.
You. If the number of white aggregates is more than 5
Sulfate content of aminotriazine compounds in compositions
Poor dispersibility, resulting in flame retardancy and impact resistance
Properties etc. decrease. The above-described method for evaluating dispersibility is based on
The melt-kneaded pellets are hot pressed to form a sheet.
Of sulfates of aminotriazine compounds contained therein
The evaluation method was based on the particle size and the number of particles.

Further, the flame-retardant resin composition of the present invention comprises:
The components (A) and (B) are the main components, and their mixing ratio is not particularly limited.
90 parts by weight and (B) 10 to 50 parts by weight, (A)
It is preferable that the components are blended so that the total amount of the components and the component (B) is 100 parts by weight. When the amount of the sulfate of the aminotriazine compound (B) is less than 10 parts by weight, the light resistance may be insufficient and a sufficient flame retardant effect may not be obtained. , Light resistance is good, but sufficient flame-retardant effect cannot be obtained, moldability and impact resistance are liable to decrease, and the cost is high because a large amount of sulfate of aminotriazine compound is used. Not preferred. The amount of component (B) is more preferably 20 to 40 parts by weight.

[0008] The sulfate of the aminotriazine compound, which is the component (B) of the flame-retardant resin composition of the present invention, is usually obtained by reacting the aminotriazine compound with sulfuric acid. The aminotriazine compound has a general formula
(I) or (II)

[0009]

Embedded image

Wherein R ¹ and R ² each independently represent an amino group, an alkyl group having 1 to 5 carbon atoms, an aryl group having 6 to 20 carbon atoms or an arylalkyl group having 7 to 20 carbon atoms; Represents O, S or NH. ] Is preferably used. In the above R ¹ and R ² , examples of the alkyl group having 1 to 5 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, an n-pentyl group, and an iso-alkyl group. And aryl groups having 6 to 20 carbon atoms such as phenyl, tolyl, ethylphenyl, xylyl, biphenyl, naphthyl, anthranyl, terphenyl, pyrenyl, quinolyl. Group, quinoxanyl group, benzoquinoxanyl group, pyrimidine group,
Examples include a pyrrole group, a furanyl group, and a thiofuranyl group. Examples of the arylalkyl group having 7 to 20 carbon atoms include:
For example, there are those in which the above-mentioned alkyl group is bonded to these aryl groups, and a benzyl group and the like are preferable. Among these, aminotriazine compounds that can be suitably used are specifically exemplified by melamine, methylguanamine, benzoguanamine, benzylguanamine, 2,4-diamino-6-morpholino-1,3,5-
Triazine, 2,4-diamino-6-piperidino-1,
3,5-triazine, 2,4-diamino-6-thiomorpholino-1,3,5-triazine and the like, which can be used alone or as a mixture of two or more. Of these, melamine is particularly preferably used.

The production of the sulfate of the aminotriazine compound of the present invention is generally carried out by a method of reacting the aminotriazine compound with sulfuric acid. These may be carried out by a conventional method, and various conditions may be employed depending on the situation. What is necessary is just to select suitably.
For example, a method of adding sulfuric acid little by little or at room temperature at room temperature with the aminotriazine compound previously dispersed in water, a method of adding sulfuric acid under stirring while pulverizing the aminotriazine compound with a ball mill at room temperature,
Alternatively, a method of adding an aminotriazine compound to sulfuric acid and the like can be mentioned. The reaction conditions at this time are not particularly limited, the temperature may be normal temperature, and the pressure may be any of reduced pressure, normal pressure, or increased pressure. The sulfuric acid used for this may be a commonly available one, and either concentrated sulfuric acid or dilute sulfuric acid can be used, but dilute sulfuric acid is preferred from the viewpoint of handling.
The reaction ratio between the aminotriazine compound and sulfuric acid is a molar ratio of 1:
It is 0.1 to 1, preferably 1: 0.2 to 0.8. If the molar ratio of sulfuric acid is less than 0.1, the effect of imparting water resistance to the aminotriazine compound is reduced, and if the molar ratio exceeds 1, unreacted sulfuric acid remains, so a large amount of water washing may be required. Not preferred. Sulfates of these aminotriazine compounds are usually powdery or granular, and the average particle size is
Although not particularly limited, those having an average particle size of 0.5 to 50 μm are preferably used. If the average particle size is less than 0.5 μm, secondary agglomeration tends to occur during melt-kneading, dispersibility is reduced, and flame retardancy and impact resistance may be reduced. On the other hand, when the average particle size exceeds 50 μm, the flame retardancy and impact resistance tend to decrease due to the large particle size. This average particle size is
Particularly preferably, it is 1 to 30 μm. Here, the average particle size is usually measured using a laser diffraction / scattering method.

Next, in the production method of the present invention, the water content of the sulfate of the aminotriazine compound used is 0.5.
% By weight or less, preferably 0.3% by weight.
% By weight or less. If the water content exceeds 0.5% by weight, the dispersibility of the sulfate of the aminotriazine compound in the composition is reduced, and as a result, the flame retardancy and impact resistance of the obtained composition are reduced. descend. In addition, since the dispersibility is reduced, the aggregate of the sulfate of the aminotriazine compound is clogged with the mesh during the melt-kneading, and the pipe is blocked (vented up), which causes a decrease in productivity. In particular, when the discharge rate is high, for example, at 50 kg / h, especially at 100 kg / h or more, the tendency becomes remarkable when continuous pelletizing is performed. There are various methods for adjusting the water content to 0.5% by weight or less, and there is no particular limitation. For example, a method of drying a sulfate of an aminotriazine compound produced by a conventional method at 130 ° C. or more for 3 to 4 hours, and for 24 hours or more depending on an atmosphere for drying is used. May be). At that time, if the pressure inside the dryer is reduced, the drying efficiency is further increased. For measurement of the water content, the usual Karl Fischer method (temperature of the water vaporizer was 180 ° C.) was used.

In the flame-retardant resin composition of the present invention, in addition to the above components, other conventionally known non-halogen flame-retardants can be appropriately used in combination, as long as the object of the present invention is not impaired.
For example, phosphorus-based flame retardants such as ammonium polyphosphate, melamine pyrophosphate, melamine phosphate, ethylenediamine phosphate, nitrogen compounds such as melamine, melamine cyanurate, benzoguanamine, trishydroxyethyl isocyanurate, melamine resin, nylon, and pentaerythritol Hydroxy-containing compounds such as, dipentaerythol, tripentaerythitol, polypentaerythol, zinc oxide, copper oxide, iron oxide, magnesium oxide,
Metal oxides such as aluminum oxide and calcium hydroxide, other heat-expandable graphite, organic sulfonic acid chlorides, silicon compounds, ethylene vinyl acetate copolymer (EV
A), oxygen-containing thermoplastic resins such as polybutylene terephthalate (PBT), and other non-halogen flame retardants such as polyphenylene sulfide or low-melting glass can be used. Furthermore, antioxidants such as phenolic compounds, phosphorus compounds and sulfur compounds, weathering agents such as benzophenones, salicylates, benzotriazoles and hindered amines, anionic, cationic, nonionic and amphoteric chargings Inhibitors, lubricants such as fatty acids, fatty acid amides, fatty acid metal salts, fatty acid esters, hydrocarbons, nucleating agents such as metal salts, sorbitol, fillers such as talc, calcium carbonate, barium sulfate, glass fiber, mica, etc. In addition, a metal deactivator, a coloring agent, an anti-blooming agent or a surface treatment agent can be used as long as the object of the present invention is not impaired.

The resin composition of the present invention may be prepared by mixing the above-mentioned components by any method, but a composition having higher uniformity can be produced by melt-kneading. Examples of equipment used for melt kneading include a high-speed stirrer represented by a Henschel mixer, a single-screw or twin-screw continuous kneader, a roll mixer, and the like, or a combination thereof. The resin composition thus obtained can be formed into a desired molded product by various molding methods. The molding method at this time is not particularly limited, and includes injection molding, extrusion molding, blow molding, and the like, and injection molding is particularly preferable. Pelletization of the resin composition is preferably performed continuously, and the discharge rate is preferably set to 50 kg / h or more, preferably 100 kg / h or more, and particularly preferably 200 kg / h or more. Are better. The molded article obtained from the resin composition of the present invention thus obtained has excellent flame retardancy and light resistance.

[0015]

Next, the present invention will be described in more detail by way of examples, which should not be construed as limiting the present invention. The components used in the following examples and comparative examples are as follows. ( A) Thermoplastic resin of component 1) Polypropylene (trade name) Idemitsu Polypro J-400M (MI = 4.5 g / 10 min) Idemitsu Polypro J-700GP (MI = 10.0 g / 10 min) Idemitsu Polypro J-900GP (MI = 16.6 g / 10 min) Idemitsu Polypro J-2000GP (MI = 20.2 g / 10 min) Idemitsu Polypro J-3000GP (MI = 31.2 g / 10 min) Idemitsu Polypro H-700 (MI = 10.10 min) 5 g / 10 min) 2) Propylene-ethylene block copolymer (trade name) Idemitsu Polypro J-3050H (MI = 31.6 g / 10 min) Idemitsu Polypro J-5053H (MI = 55.0 g / 10 min) When a mixture of polyolefin-based resins is used, the MI value of the mixture is the ratio of the blended composition because the relationship between composition and MI is a linear relationship (semi-logarithmic). Was obtained by interpolation.

Sulfur of the aminotriazine compound ( B)
Acid salt (melamine sulfate) average particle size 60 μm Water content 0.8% Average particle size 20 μm Water content 0.6% Apinone 901 (manufactured by Sanwa Chemical Co., Ltd.) was used. Average particle size 2 μm Water content 1.0% Apinon 901 (trade name, manufactured by Sanwa Chemical Co., Ltd.) was pulverized to 2 μm. Average particle size 0.4 μm Moisture content 1.2% Apinon 901 (trade name, manufactured by Sanwa Chemical Co., Ltd.) was pulverized to 0.4 μm. Manufacture of dried product Put the sample into a hot air dryer at 130 ° C.
After the time, it was taken out and the water content was measured.
% By weight. In addition, each water content was adjusted by adding water to each sample and blending. Average particle size 60 μm product: moisture content 0.2% Average particle size 20 μm product: moisture content 0.5% and 0.1
% Average particle size 2 μm product: moisture content 0.3% average particle size 0.4 μm product: moisture content 0.3% ・ The average particle size was measured using the following tester and test method. Testing machine: SALD-200V manufactured by Shimadzu Corporation Test method: Using isopropyl alcohol as a solvent,
The concentration was 100 ppm, and the particle size was measured at 0.4 to 200 μm. Here, the average particle size is a particle size (50% D) at an integrated value of 50% of the particle size distribution curve. -The following test machine and test method were used for the measurement of the water content. Testing machine: MOISTURE MET manufactured by Mitsubishi Chemical Corporation
ER CA-06 Test method: The temperature of the water vaporizer was measured at 180 ° C.

Synthesis Examples Benzoguanamine sulfate and 2,4-diamino-6-morpholino-1,3,5-triazine sulfate were synthesized by the following method. 5 mol of benzoguanamine or 2,4-diamino-6-morpholino-1,3,5-triazine having an average particle diameter of 30 μm is dispersed in 1 liter of water at room temperature, and 2.5 mol of sulfuric acid (concentration: 40% by weight) is stirred. ) Was added slowly. After reacting for 1 hour, the mixture was filtered to obtain benzoguanamine sulfate or 2,4-diamino-6-morpholino-1,3,5-triazine sulfate. Then, wash these with water,
Further drying was performed at 130 ° C. for 3 hours. Thereafter, these were pulverized to obtain white granules having an average particle diameter of 20 μm and a water content of 0.3%. The benzoguanamine sulfate synthesized here was used in Example 11 described later, and 2,4-diamino-6-morpholino-1,3,5-triazine sulfate was used in Example 12.

Example 1 (1) Pre-mixing 75 parts by weight of polypropylene (trade name: Idemitsu Polypro J-400M: 45% by weight, H-700: 55% by weight: Idemitsu Petrochemical Co., Ltd.) as a thermoplastic resin, Composition 1 comprising 25 parts by weight of melamine sulfate (II) having a particle diameter of 20 μm and a water content of 0.1% by weight as an aminotriazine compound sulfate
0.2 parts by weight of tris (2,4-di-
t-butylphenyl) phosphite (trade name: MARK)
2112: Asahi Denka Kogyo Co., Ltd.), 0.1 parts by weight of pentaerythrityl-tetrakis [3- (3,5-di-t-butyl-hydroxyphenyl) propionate] (trade name: IRGANOX1010: manufactured by Ciba Geigy) ), 0.
3 parts by weight of calcium stearate (manufactured by Dainippon Ink and Chemicals, Inc.) was mixed and preliminarily mixed with a Henschel mixer. (2) Melt kneading The obtained preliminary mixture was mixed with a twin-screw kneader (trade name: PCM4).
5II: manufactured by Ikegai Iron and Steel Co., Ltd.) to produce a composition by melt-kneading under the following conditions, and then continuously pelletized using a strand cut. -Kneading temperature 240 ° C-250 ° C-Screw rotation speed 250 rpm-Combination of meshes 60 and 80-One vent (vacuum)-Discharge rate 50-60 kg / h During melt-kneading, melamine sulfate is well dispersed and continuous. Even if granulated, do not clog the mesh and do not vent up,
Productivity was good. Further, the obtained pellets of the flame-retardant resin composition were subjected to cylinder temperature 190 to 210 ° C. and mold temperature 50 using an injection molding machine (trade name: FE-120, PS-40) manufactured by Nissei Plastics Industry Co., Ltd. A test piece was prepared by injection molding at a temperature of ° C., and its properties were evaluated by the following evaluation methods. As a result, the dispersibility of melamine sulfate was good, and white aggregates having a maximum cross-sectional area of 0.05 mm ² or more were 10 cm in length,
It was not observed in a sheet 10 cm wide and 0.5 mm thick. The Izod impact strength is 43 kJ / m, UL9
5 The flame retardancy was V-2, ΔE (color difference; difference in color tone before and after light irradiation) was 0.58, and ΔYI (yellowness difference; difference in yellowness before and after light irradiation) was -0.58. It was excellent in impact resistance, flame retardancy and light resistance, and the obtained flame retardant resin was white, could be toned in all colors, and had no odor.

Test Method and Evaluation Method Evaluation of Dispersibility The pellets were hot-pressed to a length of 10 cm and a width of 10 c.
When a sheet having a thickness of 0.5 mm and a thickness of 0.5 mm is prepared and irradiated with a fluorescent lamp from above, white aggregates appear white and foreign matter appears black. Then, the evaluation of the dispersibility was performed by counting the number of the white aggregates that appeared white and used as evaluation criteria. The size of the maximum cross-sectional area of the white agglomerates was visually determined by comparing the area of a 0.05 mm ² point shown in a separately prepared reference table with the area. Confirmation analysis of white aggregate of mesh clogging Tester: Fourier transform infrared spectroscopy (FT-IR) was performed using FTS-165 manufactured by BIO-RAD. Evaluation of Flame Retardancy The flame retardancy was measured by a vertical combustion test according to UL94 standard. Testing machine: HVUL plastic UL combustion test chamber manufactured by Atlas Co., Ltd. Test method: A vertical combustion test was performed on 3.2 mm, 1.6 mm, and 1.2 mm thick test pieces in accordance with UL94. Measurement of MI Test machine: Melt indexer S-001, manufactured by Toyo Seiki Seisaku-sho, Ltd. Test method: Measured at 230 ° C. and 2.16 kg. Izod impact strength According to ASTM D256. Light fastness tester: Atlas Electric Devices (AT
LAS ELECTRIC DEVICESCO.) Weather Ometer (WEA
THER OMETER), Model C165 Test Method: Irradiated with a xenon lamp for 350 hours under conditions of a black panel at 63 ° C. and a humidity of 50%. ΔE and ΔYI measurement Test machine: ΔE and ΔYI were measured by SM color computer SM-3 manufactured by Suga Test Instruments Co., Ltd.

Examples 2 to 12 and Comparative Examples 1 to 10 In accordance with Example 1, each performance test was carried out under the compositions and conditions shown in Table 1 by the same test methods and evaluation criteria as in Example 1. The results are shown in Table 2.

[0021]

[Table 1]

[0022]

[Table 2]

[0023]

[Table 3]

[0024]

[Table 4]

As can be seen from Tables 1 and 2, amino acids having a particle size of 0.5 to 50 μm and a water content of 0.5% or less were used for producing the composition of the present invention. By using a sulfate of a triazine compound and a polyolefin resin having a high fluidity (MI = 7 to 100 g / 10 minutes), the dispersibility becomes good, the productivity is good without vent-up, and the product is obtained. The resin composition is
Excellent in various performances such as Izod impact strength, flame retardancy and light resistance test. Further, the obtained flame-retardant resin was white, could be toned in all colors, and had no odor.

On the other hand, in Comparative Examples 1 to 10, the desired flame-retardant resin could not be obtained for the following reasons. That is,
If the water content of the melamine sulfate exceeds 0.5% (Comparative Examples 1 and 2), the dispersibility becomes poor, the mesh is clogged at the time of production, and venting is caused, resulting in poor productivity. Furthermore, poor Izod impact strength and flame retardancy due to poor dispersibility. In addition, the mesh clogging substance was obtained by Fourier transform infrared spectroscopy (FT-
As a result of IR), it was confirmed to be melamine sulfate.
FT-IR charts of the mesh clogging substance and melamine sulfate are shown in FIGS. 1 and 2, respectively. When the particle size of the melamine sulfate is larger than 50 μm (Comparative Example 3), the dispersibility and the productivity are good, but the Izod impact strength,
When the flame retardancy and light resistance are poor and the particle diameter is smaller than 0.5 μm (Comparative Example 4), the dispersibility is slightly poor but the productivity is good. Poor Izod impact strength, flame retardancy and light resistance. Melamine sulfate has a water content of more than 0.5% and a particle size of 50%.
If it is larger than μm (Comparative Example 5), the dispersibility becomes poor,
Mesh is clogged during production and vented up, resulting in poor productivity. Furthermore, poor Izod impact strength, flame retardancy, and light resistance due to poor dispersibility. On the other hand, if the melamine sulfate water content exceeds 0.5% and the particle size is less than 0.5 μm (Comparative Example 6), the dispersibility becomes poor, the mesh is clogged at the time of production, and the vent is raised, resulting in poor productivity. Becomes Furthermore,
Poor Izod impact strength and flame retardancy due to poor dispersibility.
Further, when the water content and the particle size of the melamine sulfate are within the scope of the present invention, if the MI value of the polyolefin is less than 7 g / 10 minutes (Comparative Example 7), the dispersibility, productivity, Izod The impact strength and light resistance are good, but the flame retardancy is poor, and if the amount of melamine sulfate is less than 10 parts by weight (Comparative Example 8), the dispersibility, productivity, and Izod impact strength are good. However, when the flame retardancy and light resistance are poor, and the amount of melamine sulfate exceeds 50 parts by weight (Comparative Example 9), the dispersibility, productivity and light resistance are good, but the flame retardancy and light resistance are good. Izod impact strength was poor. In the case of using only polyolefin without adding melamine sulfate (Comparative Example 10), the Izod impact strength was good, but the flame retardancy and light resistance were poor.

[0027]

The present invention has no problem of environmental pollution, has good dispersibility, is excellent in productivity, has no decrease in mechanical strength, and has excellent heat resistance and high flame retardancy. It is possible to provide a resin composition having light resistance, easy toning, no odor, high flowability and suitable for injection molding, and a method for producing the same. Therefore, the flame-retardant resin composition of the present invention is particularly useful for various applications of currently used polyolefin-based resins.
It is suitable for molding of exterior materials (housing and the like) and interior parts (connectors, substrate holders and the like) requiring flame retardancy in products and automobile fields.

[Brief description of the drawings]

Fig. 1 Fourier transform infrared spectroscopy chart of mesh clogged material

Fig. 2 Fourier transform infrared spectroscopy chart of melamine sulfate

Claims (8)

[Claims] 1. A flame-retardant resin composition containing (A) a thermoplastic resin and (B) a sulfate of an aminotriazine compound, wherein the composition is formed into a sheet having a size of 0.5 mm × 10 cm × 10 cm. When the maximum cross-sectional area existing in it is 0.0
A homogeneous flame-retardant resin composition comprising 5 or less white aggregates of 5 mm ² or more. 2. The composition according to claim 1, wherein (A) 50 to 90 parts by weight of a thermoplastic resin and (B) 10 to 50 parts by weight of a sulfate of an aminotriazine compound are blended in a total of 100 parts by weight. Flame-retardant resin composition. 3. The flame-retardant resin composition according to claim 1, wherein the thermoplastic resin (A) is a polyolefin resin. 4. The polyolefin resin of the component (A),
The flame-retardant resin composition according to claim 3, wherein the melt index measured at a temperature of 230 ° C and a load of 2.16 kg is 7 to 100 g / 10 minutes. 5. The flame-retardant resin composition according to claim 1, wherein the average particle size of the sulfate of the aminotriazine compound (B) is 0.5 to 50 μm. 6. The aminotriazine compound in the component (B) is a compound represented by the general formula (I) or (II): [Wherein, R ¹ and R ² each independently represent an amino group, an alkyl group having 1 to 5 carbon atoms, an aryl group having 6 to 20 carbon atoms, or an arylalkyl group having 7 to 20 carbon atoms; S or NH]. The flame-retardant resin composition according to claim 1, which is a sulfate of an aminotriazine compound represented by the formula: 7. The flame-retardant resin composition according to claim 1, wherein the sulfate of the aminotriazine compound (B) is melamine sulfate. 8. A blend of (A) a thermoplastic resin and (B) a sulfate of an aminotriazine compound, wherein a sulfate of an aminotriazine compound having a water content of 0.5% by weight or less is used. The method for producing a flame-retardant resin composition according to claim 1.