JPH0848812A - Flame-retardant resin composition - Google Patents

Abstract

(57) [Abstract] [Purpose] A flame-retardant resin composition having flame-retardant properties, low toxicity, and not impairing the properties of the resin. A resin composition comprising 100 parts by weight of a thermoplastic resin and 10 to 300 parts by weight of a triazine compound sulfate, for example, melamine sulfate or benzoguanamine sulfate.

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 which has low toxicity and does not impair the properties of the resin.

[0002]

2. Description of the Related Art Some thermoplastic resins have the property of easily igniting and burning. For this reason, it cannot be used as it is for an inconvenient use after burning. Therefore, various flame retardants have been applied for use in such applications.

Generally, flame retardation of a thermoplastic resin is achieved by blending various flame retardants. Examples of flame retardants include halogen-based flame retardants, phosphorus-based flame retardants, and metal hydroxides represented by magnesium hydroxide.

However, regarding halogen-based flame retardants, not only acid gases such as hydrogen bromide and hydrogen chloride generated during combustion but also generation of dioxins have recently been regarded as a problem. Further, phosphorus-based flame retardants have the problems of explosiveness and phosphine generated during molding.
Therefore, non-halogen-non-phosphorus flame-retardant materials are receiving attention.

A metal hydroxide such as magnesium hydroxide is a non-halogen-non-phosphorus flame retardant and has a low toxicity, but has a problem of poor acid resistance. However, there is a problem that the properties of the resin are impaired.

[0006]

As described above, when the conventional non-halogen non-phosphorus flame retardant is used, there are problems that the acid resistance is poor and the properties of the resin are impaired. Therefore, the development of a resin composition that does not have these problems in a thermoplastic resin provided with flame retardancy has been an issue.

[0007]

Means for Solving the Problems As a result of intensive studies conducted by the present inventor in view of the above-mentioned problems, a resin composition containing a thermoplastic resin and a sulfate of a triazine compound is excellent in acid resistance,
The inventors have found that the properties of the resin are not impaired, and have completed the present invention.

That is, the present invention provides (A) thermoplastic resin 100.
Parts by weight and (B) sulfate of triazine compound 10
The flame-retardant resin composition is characterized by containing ˜300 parts by weight.

The thermoplastic resin used in the present invention includes polyolefins such as polyethylene and polypropylene, styrene resins such as polystyrene, AS resin and ABS resin, vinyl resins such as polymethylmethacrylate, polyvinyl acetate and polyvinyl alcohol, Polyamide resins such as nylon 6 and nylon 66, polyester resins such as polyethylene terephthalate and polybutylene terephthalate, polycarbonate resins, polyether resins, elastic polymers such as SBR, NBR, polybutadiene and polyisoprene, and various resins modified with these. Among them, polyolefin is preferably used. These thermoplastic resins can be used alone or in combination.

Examples of the sulfate of the triazine compound used in the present invention include conventionally known compounds having a triazine skeleton, for example, sulfates of melamine, benzoguanamine, methylguanamine and the like. These can be used alone or in combination.

The amount of the triazine compound sulfate compounded should be 10 to 300 parts by weight, preferably 15 to 250 parts by weight, per 100 parts by weight of the thermoplastic resin. If the blending amount is less than the lower limit value, sufficient flame retardant effect cannot be obtained, and if the blending amount is more than the upper limit value, not only moldability, impact resistance decrease, specific gravity increase, etc., but also stable kneading This is not preferable because it makes the work difficult.

The flame-retardant resin composition of the present invention contains, in addition to the above-mentioned components, conventionally known antioxidants (phenolic compounds, phosphorus-based compounds, if necessary) as long as the effects of the present invention are not impaired. Sulfur compounds, etc.), weathering agents (benzophenone, salicylate, benzotriazole, hindered amine, etc.), metal deactivators, colorants, antistatic agents (anionic, cationic, nonionic, amphoteric), Lubricants (fatty acids, fatty acid amides, fatty acid metal salts, fatty acid esters, hydrocarbons, etc.), nucleating agents (metal salt systems, sorbitol, etc.), fillers (talc, calcium carbonate, barium sulfate, glass fiber, mica, etc.), It may contain an anti-blooming agent.

There are no particular restrictions on the mixing order, mixing method, etc. of the components for preparing the flame-retardant resin composition of the present invention. Generally, a tumbler type blender, a V type blender, a Henschel mixer, a ribbon mixer, etc. are used. Done by.

[0014]

[Effect] The flame-retardant resin composition of the present invention is non-halogen-containing.
A resin composition that is non-phosphorus, has excellent acid resistance, and does not impair the properties of the resin.

[0015]

EXAMPLES In order to more specifically describe the present invention, examples and comparative examples will be described below, but the present invention is not limited to these examples. The symbols shown in Examples and Comparative Examples are as follows.

1. Thermoplastic resin A: ethylene-propylene block copolymer (Tokuyama Polypro PN670G, manufactured by Tokuyama) B: propylene homopolymer (Tokuyama Polypro PN150)
G: Tokuyama) C: High density polyethylene (PE-1000, Tosoh Corporation) D: Polystyrene (Estyrene G-20, Nippon Steel Chemical) 2. Flame Retardant E: Melamine Sulfate F: Benzoguanamine Sulfate G: Magnesium Hydroxide Examples and Comparative Examples Preparation and test methods for flame retardant resin compositions were carried out as follows, and the results are shown in Table 1 (1 ) Synthesis of triazine compound sulfate A triazine compound is dispersed in water and sulfuric acid is added with stirring. After reacting for 1 hour, filtration and drying are performed to obtain a triazine compound sulfate.

(2) Pre-mixing 100 parts by weight of polypropylene and 2,6-di-t-butyl-4-methylphenol (a stabilizer BHT manufactured by Sumitomo Chemical Co., Ltd.) as a flame retardant in the composition table shown in Table 1 are used. 0.
1 part by weight, dilauryl thiodipropionate (Sumitomo Chemical Co., Ltd., Sumilizer TPL-R): 0.2 part by weight,
Calcium stearate (manufactured by Dainippon Ink and Chemicals, Inc.): 0.1 part by weight was mixed and premixed with a Henschel mixer.

(3) Pelletization The above mixture was pelletized by using a vented 50 mmφ extruder.

(4) Preparation of test piece A test piece (length: 5 inches, width: 1/2 inch, thickness: 1/8 inch) was prepared from the above pellets using a 2oz injection molding machine.

(5) Effect test (a) Combustion test Using the test piece prepared by the method of (4), the combustibility was judged by a vertical combustion test in compliance with UL94 standard.

(A) Acid resistance test Using the test piece prepared by the method of (4), temperature 30
The state after 24 hours was evaluated in an environment of hydrochloric acid of pH 4 at ° C.

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[0023]

[Table 1]

Claims (1)

[Claims] 1. A flame-retardant resin composition comprising 100 parts by weight of a thermoplastic resin and 10 to 300 parts by weight of a sulfate of a triazine compound.