JPH06128451A - Flame-retardant resin composition excellent in light resistance - Google Patents

Abstract

PURPOSE:To provide a composition excellent in molding processability and mechanical properties, useful for home appliances, etc., comprising a rubber- reinforced resin and specific haloaromatic flame retardant at specified proportion. CONSTITUTION:The composition can be obtained by incorporating (A) 100 pts.wt. of a rubber-reinforced resin with (B) 1-40 pts.wt. of a haloaromatic flame retardant such as an ethylenebistetrabromophthalimide compound, tetrabromobisphenol A epoxy compound and/or tetrabromobisphenol A carbonate oligomer 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 having excellent light resistance, and in particular, it has excellent flame retardancy and remarkably good light resistance, and it is a household electric appliance, OA equipment, office equipment. , And a resin composition suitable as a housing material for various other devices.

[0002]

2. Description of the Related Art Acrylonitrile-butadiene-styrene resin (ABS resin), acrylonitrile-acrylic rubber-styrene resin (AAS resin), acrylonitrile-ethylene / propylene rubber-styrene resin (AES)
BACKGROUND ART A rubber reinforced resin such as resin) has been widely used as a housing material for household electrical appliances, office automation equipment, office equipment, and other various devices because of its excellent moldability and mechanical properties.

However, it has been known to blend various organic or inorganic flame retardants for the purpose of enhancing the flame retardancy of these rubber-reinforced resins, and conventionally, phosphorus-based or organic flame retardants have been used as organic flame retardants. Halogen compounds are used, and antimony oxides are used as inorganic flame retardants.

[0004]

By the way, regarding the housing material of various equipment, its flame retardancy and moldability,
Not only mechanical properties but also light resistance is strongly required.
That is, a resin material having poor light resistance is discolored by long-term use and its appearance is significantly impaired. Therefore, a resin material excellent in light discoloration resistance and not discolored for a long time is desired.

Therefore, in order to improve the light resistance of the resin material, a method of adding a light resistance stabilizer or an ultraviolet absorber has been proposed. However, in addition to the flame retardant, the addition of these additives for improving light resistance not only causes a large increase in the cost of the additive, but also causes a decrease in flame retardancy and mechanical properties. In some cases, it is not an industrially advantageous method.

The present invention has been made in view of the above conventional circumstances, and an object thereof is to provide a flame-retardant resin composition excellent in light resistance by using a specific flame retardant.

[0007]

A flame-retardant resin composition having excellent light resistance of the present invention comprises 1 to 40 parts by weight of a halogen-containing aromatic flame retardant with 100 parts by weight of a rubber-reinforced resin. A flame-retardant resin composition obtained by blending an ethylenebistetrabromophthalimide compound and a tetrabromobisphenol A epoxy compound and / or a tetrabromobisphenol A carbonate oligomer compound as the halogen-containing aromatic flame retardant. It is characterized by

The present invention will be described in detail below.

In the flame-retardant resin composition having excellent light resistance of the present invention, the rubber-reinforced resin is ABS resin or AAS.
Resin, AES resin, etc. can be used. The compounding ratio of these rubber-reinforced resins is not particularly limited, and known compounds can be used.

On the other hand, in the present invention, the halogen-containing aromatic flame retardant compounded and used as a flame retardant in such a rubber-reinforced resin is an ethylenebistetrabromophthalimide compound, a tetrabromobisphenol A epoxy compound, a tetrabromobisphenol A carbonate oligomer compound. The ethylenebistetrabromophthalimide compound is used as an essential component, and one or both of and are used in combination.

It is also possible to blend one or more of tetrabromobisphenol A, decabromodiphenyl oxide, brominated styrene, triphenyl phosphate and the like as an essential component.

Specific examples of the halogen-containing aromatic flame retardant described above are as follows.

[0013]

[Chemical 1]

In the present invention, one of these halogen-containing aromatic flame retardants is used per 100 parts by weight of the rubber-reinforced resin.
-40 parts by weight are compounded. If the amount of the halogen-containing aromatic flame retardant compounded is less than 1 part by weight, a sufficient effect of improving flame retardancy cannot be obtained, and if it is added in excess of 40 parts by weight, further improvement of flame retardancy is achieved. This is not preferable because the effect cannot be obtained, the cost of the additive increases, and other properties such as mechanical properties may be impaired.

In the halogen-containing aromatic flame retardant, the blending amount of the ethylenebistetrabromophthalimide compound is preferably 1 to 25 parts by weight with respect to 100 parts by weight of the rubber-reinforced resin. If the blending amount of the ethylenebistetrabromophthalimide compound is less than 1 part by weight, a sufficient light resistance improving effect cannot be obtained, and if it exceeds 25 parts by weight, the tetrabromobisphenol A epoxy compound and / or tetrabromobisphenol A carbonate is relatively present. The amount of the oligomer compound compounded becomes small, and mechanical properties, moldability (fluidity) and the like may be impaired.

In the present invention, 7 to 15 parts by weight of ethylenebistetrabromophthalimide compound and tetrabromobisphenol A are added to 100 parts by weight of the rubber-reinforced resin.
It is particularly preferable to add 7 to 20 parts by weight of the epoxy compound and / or the tetrabromobisphenol A carbonate oligomer compound.

Other additives may be added to the resin composition of the present invention depending on the purpose. For example, light resistance can be further improved by adding an ultraviolet absorber (UV agent). In this case, it is preferable that the compounding amount of the UV agent is 2 parts by weight or less based on 100 parts by weight of the rubber-reinforced resin.

Further, by adding another flame retardant such as antimony trioxide as a flame retardant aid, the flame retardancy can be further improved. In this case, the compounding amount of antimony trioxide is preferably 10 parts by weight or less with respect to 100 parts by weight of the rubber-reinforced resin.

Further, an antistatic agent such as polyalkylene oxide, epihalohydrin, metal salt of alkylsulfonic acid, etc. can be blended.

Such a resin composition of the present invention is easily prepared by blending the rubber-reinforced resin, the halogen-containing aromatic flame retardant and, if necessary, other additives in a predetermined ratio and kneading. It can be molded into a product by a known method such as injection molding, hollow molding, extrusion molding, compression molding, roll processing, and stretching processing.

[0021]

The rubber-reinforced resin is excellent in the rubber-reinforced resin by using the ethylene-bis-tetrabromophthalimide compound and the tetrabromobisphenol-A epoxy compound and / or the tetrabromobisphenol-A carbonate oligomer compound as the flame retardant in combination. Both flame retardancy and light resistance can be remarkably improved without impairing moldability and mechanical properties.

Incidentally, in the case of using only the ethylenebistetrabromophthalimide compound, although the light resistance and the flame retardancy can be improved, the mechanical characteristics and the molding processability are deteriorated.

Further, in the case where only the tetrabromobisphenol A epoxy compound and / or the tetrabromobisphenol A carbonate oligomer compound is used, flame retardancy can be imparted without impairing moldability and mechanical properties. Light resistance cannot be obtained.

That is, the ethylenebistetrabromophthalimide compound is a flame retardant effective for improving the light resistance, but it is not preferable in terms of mechanical properties and molding processability, and conversely, it is a tetrabromobisphenol A epoxy compound and / or The tetrabromobisphenol A carbonate oligomer compound is a preferable flame retardant in terms of mechanical properties and moldability, but it is not effective in improving light resistance.

On the other hand, according to the present invention, by using the ethylenebistetrabromophthalimide compound in combination with the tetrabromobisphenol A epoxy compound and / or the tetrabromobisphenol A carbonate oligomer compound, flame retardancy, light resistance, molding A resin composition having good processability and mechanical properties and an excellent balance of these properties is provided.

[0026]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to the following examples as long as the gist thereof is not exceeded.

The materials used in Examples and Comparative Examples are as follows.

ABS resin: "Cycolac (trademark)" AM "manufactured by Ube Cycon Co., Ltd. AAS resin:" Weatherfill (trademark) "manufactured by Ube Cycon Co., Ltd. AES resin:" UCL-AXS manufactured by Ube Cycon Co., Ltd. "
(Trademark) Flame Retardant A (Ethylenebistetrabromophthalimide):
Ethyl “Saytex ™“ BT93-W ”” flame retardant B (tetrabromobisphenol A epoxy):
Hitachi Chemical "BRROMITE (trademark)" BR15
2 "" flame retardant C (tetrabromobisphenol A carbonate oligomer): "Iupilon (trademark)" manufactured by Mitsubishi Gas Chemical Co., Inc.
“FR34” UV agent: “Tinubin ™” TINU manufactured by Ciba Geigy
VIN P "" Flame Retardant Auxiliary Agent (antimony trioxide): Nihon concentrate "ATOX"
-S (trademark) "SBO""Examples 1 to 14 and Comparative Examples 1 to 11 Resin compositions were prepared according to the formulations shown in Table 1 and molded by a conventional method. The characteristics were evaluated with and the results are shown in Table 1.

Impact Strength Impact strength is measured by the notched Izod impact strength,
According to ASTM D256, it measured using the test piece of thickness 1/8 inch.

Heat distortion temperature According to ASTM D648, fiber stress 1
It was measured at 8.56 kg / cm ² without any annealing treatment.

Light Discoloration Resistance Xenon. Using weather meter Ci65A, black panel temperature 63 ℃
After irradiating the test piece with UV light for 300 hours, the color difference (ΔE) with the unirradiated test piece is measured by a color difference meter (MSC- manufactured by Suga Test Instruments Co.
IS-2B. The color was measured with a light source D-65 (10-degree visual field).

Regarding the color difference (ΔE) value, the smaller the value, the better the light discoloration resistance.

Flame Retardancy As a flame retardancy evaluation scale, a test piece having a thickness of 1.6 mm was evaluated according to the vertical combustion test specified in UL94 of the US UL standard.

Fluidity As a measure of fluidity, the melt flow rate was evaluated according to ASTM D1238.

[0035]

[Table 1]

The following is clear from Table 1.

That is, Comparative Examples 1 to 3 and 7 to 11 using only the flame retardant B or only the flame retardant C, and Examples 1 to 3, 7, 9 to 14 using the flame retardant A and the flame retardant B together. , Flame retardant A
By comparing Examples 4 to 6 in which the flame retardant C is used together and Example 8 in which the flame retardant A and the flame retardants B and C are used in combination, good light resistance is obtained when the flame retardants B and C are used alone. However, the light resistance is significantly improved by using the flame retardant A together.

Comparative Examples 4 to 6 using only the flame retardant A
By comparing Examples 1 to 14 in which the flame retardant A and the flame retardant B and / or the flame retardant C are used in combination, the impact resistance and the fluidity are reduced when only the flame retardant A is used. And flame retardant B and / or flame retardant C together,
By suppressing the deterioration of these properties, the flame retardancy and light resistance can be remarkably improved.

[0039]

As described in detail above, according to the flame-retardant resin composition of the present invention having excellent light resistance, ethylene bis-tetrabromophthalimide compound and tetrabromobisphenol A epoxy are used as halogen-containing aromatic flame retardants. By using the compound and / or the tetrabromobisphenol A carbonate oligomer compound in combination, a flame-retardant property, a light resistance property, a molding processability and a mechanical property are good, and a resin composition having an excellent balance of these properties is provided. To be done.

Such a resin composition of the present invention is extremely useful as a housing material for household appliances, office automation equipment, office equipment, etc., can be easily manufactured, has high mechanical strength, and has high heat resistance. A product which is excellent, excellent in combustion resistance, and also excellent in light discoloration resistance is provided.

Claims (1)

[Claims] 1. A flame-retardant resin composition comprising 100 parts by weight of a rubber-reinforced resin and 1 to 40 parts by weight of a halogen-containing aromatic flame retardant, the halogen-containing aromatic flame-retardant agent. A flame-retardant resin composition having excellent light resistance, characterized by comprising an ethylenebistetrabromophthalimide compound and a tetrabromobisphenol A epoxy compound and / or a tetrabromobisphenol A carbonate oligomer compound.