JPH0532839A - Resin composition - Google Patents

Abstract

PURPOSE:To provide a resin composition which excellent light resistance, flame retardancy and impact resistance and good heat stability during molding but also in free from boss cracking when subjected to especially insert molding. CONSTITUTION:A composition comprising a chlorinated polyethylene (A) of a chlorine content of 15-45wt.%, a polyvinyl chloride resin (B), an AS resin (C), an alpha As resin (D), a bromine-containing reaction product (E), antimony oxide (F) and a polyorganosiloxane (G). 5-25wt.% component A and 1.0-20wt.% component B are present on the basis of the total weight of components A to D, 0.5-25wt.% component E, below 5wt.% component F and 0.05-5.0wt.% component G are present on the basis of the total weight of components A to G, and 3-80wt.% component D is present on the basis of the total weight of components C and D. The halogen is present in an amount of 5.0-25wt.% based on the total of components A to E.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention is excellent not only in light resistance, flame retardancy and impact resistance but also in good thermal stability during molding, and in particular, there is no boss cracking during insert molding, especially OA.
The present invention relates to a resin composition suitable for equipment and home appliances.

[0002]

2. Description of the Related Art At present, acrylonitrile-butadiene-styrene terpolymer resin (as a housing material required to be flame-retardant for electric equipment such as television sets, word processors, various computers, facsimiles, and electronic equipment) ABS resin) and other impact-resistant resins mixed with halogen-based flame retardants, ABS resin and polyvinyl chloride-based resin compositions, polyphenylene oxide resins and polystyrene-based resin compositions A composition in which a halogen-based flame retardant is mixed with a material (modified PPO resin) is widely used. But,
Add flame retardant to ABS resin, modified PPO resin, etc.,
To impart a high degree of flame retardancy, a large amount of flame retardant must be added (added). Therefore, the mechanical strength (impact strength, tensile strength, etc.) of the composition is low, and there is a problem in light resistance. Further, although a composition comprising an ABS resin and a polyvinyl chloride resin is excellent in flame retardancy and light resistance,
There is a problem in heat stability during molding, moldability and heat resistance. As means for solving these problems, means for blending a halogen-containing high molecular substance such as chlorinated polyethylene with ABS resin etc. (JP-A-54-40845) and flame retardant with improved light resistance are used. Means (JP-A-63
No. 72749), a composition of a polyvinyl chloride resin and an ABS resin, which have improved molding heat stability and fluidity (JP-A-6-2696).
0-208345, 63-182364) and the like have been proposed. However, with these means and compositions,
Some of the various characteristics can be improved to some extent, but they are not always satisfactory.

From these things, some of the present inventors
Already (A) chlorinated polyethylene having a chlorine content of 20 to 45% by weight, (B) butadiene rubber, ethylene-
An impact-resistant resin obtained by graft-copolymerizing styrene and acrylonitrile or styrene and methyl methacrylate onto propylene rubber or acrylic ester rubber, and a selected from the group consisting of copolymer resins of styrene and acrylonitrile or styrene and methyl methacrylate. At least one thermoplastic resin,
The molecular weight obtained by reacting (C) polyvinyl chloride resin, (D) bromine-containing epoxy compound and 1,3,5-tribromophenol has a molecular weight of 1,200 to 6,
And a bromine-containing reaction product having a bromine content of 5.0 to 60% by weight, (E) antimony oxide and (F) a polyorganosiloxane have been proposed (Japanese Patent Application No. 1-3336579). issue).

[0004]

However, this composition has a problem that boss cracking may occur during insert molding depending on the application. From this, the present invention not only has excellent light resistance, flame retardancy, impact resistance, and good thermal stability during molding, but also provides a resin composition free from boss cracks during insert molding. To aim.

[0005]

According to the present invention, these problems are (A) chlorinated polyethylene having a chlorine content of 15 to 45% by weight, (B) polyvinyl chloride resin,
(C) Copolymer resin of styrene and acrylonitrile,
(D) Copolymer resin of α-methylstyrene and acrylonitrile, (E) Bromine-containing epoxy compound and 1,3,5-
A bromine-containing reaction product having a molecular weight of 1,200 to 6,000 and a bromine content of 5.0 to 60 wt% obtained by reacting with tribromophenol, (F) antimony oxide and ( G) is a composition comprising polyorganosiloxane, and comprises (A), (B),
The composition ratio of the components (C) and (D) in the total amount is such that the component (A) is 5 to 25% by weight, the component (B) is 1.0 to 20% by weight, and the component (A) is The composition ratio of the other component to the total amount of 100 parts by weight of each of the components (B), (C) and (D) is 0.5 to 25 parts by weight of the component (E) and a large amount of the component (F). 10 parts by weight, the component (G) is 0.05 to 5.0 parts by weight, and the ratio of the component (D) in the total amount of the components (C) and (D) is 3 to 80. % By weight, and (A), (B), (C),
This can be solved by the resin composition in which the halogen content in the total amount of the components (D) and (E) is 5.0 to 25% by weight. Hereinafter, the present invention will be specifically described.

Component (A) Chlorinated Polyethylene The chlorinated polyethylene used in the present invention is chlorinated by chlorinating polyethylene powder or particles described below in an aqueous suspension or by dissolving polyethylene in an organic solvent. Can be manufactured. Among them, the method of chlorinating in an aqueous suspension is preferable. Chlorinated polyethylene is industrially produced and used in various fields, and the above-mentioned production method and various physical properties are well known. Polyethylene is obtained by homopolymerizing ethylene or copolymerizing ethylene with at most 20% by weight (preferably 10% by weight or less) of an α-olefin having at most 12 (preferably 3 to 8) carbon atoms. Is obtained by. The density of the polyethylene is generally 0.910 to 0.970 g / cm ³ , and particularly preferably 0.920 to 0.970 g / cm ³ . The molecular weight is usually at least 30,000, and particularly preferably 50,000 to 600,000. The chlorine content of the chlorinated polyethylene of the present invention is 15 to 45% by weight, preferably 18 to 40% by weight, and particularly 2
0-40% by weight is preferred. Chlorine content is 15% by weight
When it is less than 1, the impact resistance and flame retardancy of the resulting composition are not good. On the other hand, if it exceeds 45% by weight, not only the impact resistance is not good, but there is a problem in the thermal stability. The Mooney viscosity (ML _{1 + 4} , 100 ° C.) is generally 30-
150, preferably 40 to 150, particularly 40 to 1
Those of 30 are preferable. Mooney viscosity (ML _{1 + 4} , 1
If the temperature (00 ° C) is less than 30, the mechanical strength obtained is low.
On the other hand, when it exceeds 150, there is a problem in workability.

Component (B) Polyvinyl Chloride Resin The polyvinyl chloride resin used in the present invention is obtained by homopolymerizing vinyl chloride or copolymerizing various monomers capable of copolymerizing vinyl chloride and vinyl chloride. It is manufactured by Representative examples of various monomers include vinylidene chloride, ethylene, vinyl acetate, acrylonitrile and acrylic acid, methacrylic acid and maleic anhydride and their esters. The copolymerization ratio of various monomers is usually at most 40.
% By weight, preferably 30% by weight or less. These homopolymers and copolymers are generally produced by suspension polymerization, bulk polymerization or emulsion polymerization. The average degree of polymerization of the polyvinyl chloride resin of the present invention is generally 400 to 2,000 from the viewpoint of kneading properties when producing a composition, mechanical properties and thermal stability of the resulting composition, and 500. -1,800 is preferable, and especially 500-1,
600 is preferred. These polyvinyl chloride resins are industrially manufactured and used in various fields, and their manufacturing methods and physical properties are well known.

Component (C) Copolymer resin of styrene and acrylonitrile (hereinafter referred to as AS resin) The AS resin used in the present invention is a copolymer resin of styrene and acrylonitrile. The copolymerization ratio of styrene in this copolymer resin is generally 40 to 85% by weight.
And preferably 50 to 80% by weight. The AS
The resin can be produced by any of the commonly used methods of aqueous suspension polymerization, emulsion polymerization, solution polymerization, and bulk polymerization, and is industrially produced and widely used. The molecular weight of the AS resin of the present invention is usually 1,0.
It is from 00 to 300,000, preferably from 5,000 to 300,000.
When the molecular weight is 1,000 or less, impact resistance and mechanical properties are insufficient. If it is more than 300,000, the workability is not good.

Component (D) Copolymer resin of α-methylstyrene and acrylonitrile (hereinafter referred to as αAS resin) The αAS resin used in the present invention is a copolymer resin of α-methylstyrene and acrylonitrile. The copolymerization ratio of α-methylstyrene in this copolymer resin is generally 50 to 90% by weight, preferably 60 to 80% by weight. The αAS resin of the present invention is industrially produced by the same method as the AS resin and is widely used. The molecular weight of the αAS resin of the present invention is 1,000.
˜200,000, preferably 3,000 to 150,000. When the molecular weight is 1,000 or less, impact resistance and mechanical properties are insufficient. If it is 200,000 or more, the workability is not good.

Component (E) Bromine-containing reaction product Further, typical examples of the bromine-containing reaction product used in the present invention are bromine-containing epoxy compounds represented by the formula (I) and 1,3,5-tribromophenol. It is obtained by reacting with and is represented by the formula (II) as the main component. As a result, the terminal epoxy group of the bromine-containing epoxy compound represented by the formula (I) reacts,
The residual epoxy group is at most 1 in the initial amount of epoxy.
5%.

[Chemical 1] (In the formulas (I) and (II), R ¹ and R ²
May be the same or different and each represents a hydrogen atom or a methyl group, m is 0 or an integer of 1 to 7, and l is 0 to 4
Is. ) In formulas (I) and (II), each l is 1
-4 is preferable. The bromine-containing epoxy compound represented by the formula (I) comprises 4,4′-dioxydiphenylpropane (bisphenol A) containing at least one bromine atom and epichlorohydrin in the same manner as a general ether type epoxy resin. It can also be manufactured. Further, it can be produced by reacting bromine-free ether type epoxy resin with bromine. The bromine-containing reaction product has a molecular weight of 1,200 to 6,000, preferably 1,400 to 5,000. The bromine content is 5.0 to 60% by weight, and particularly preferably 10 to 60% by weight.

Component (F) Antimony Oxide Further, the antimony oxide used in the present invention is widely used as a flame retardant aid for chlorinated polyethylene and general bromine-containing compounds. Typical examples are antimony trioxide, antimony pentoxide and these antimony oxides. The average particle size of the antimony oxide is 0.3 to 150 μm. Component (G) Polyorganosiloxane Further, a typical example of the polyorganosiloxane used in the present invention has a general formula represented by the following formula ((III) formula). X ¹ [(R ³ R ³ SiO) _i (R ³ R ⁴ SiO) _j ] X ² (III) (III) In the formula, R ³ is a hydrogen atom or an alkyl group having at most 18 carbon atoms, aryl ( aryl group, a cycloalkyl group and an aralkyl group, which is a hydrocarbon group (which may contain a halogen atom) selected from the group consisting of at least 50% is a methyl group or an ethyl group, and R ⁴ is a vinyl group or It is an allyl group. X ¹ is R ³ R ⁴ Si—O— and HO—.
A block group at the end which is selected from the group comprising, X ²
Is a blocking group terminal selected from the group comprising R ⁵ R ³ R ³ Si- and H- (wherein, R ⁵ is a group of monovalent selected from the group comprising the R ³ or R ⁴⁾ .. Further, i / (i + j) is 0.70 to 0.90. In the polyorganosiloxane represented by the formula (III),
The i / (i + j) is preferably 0.75 to 0.90, and particularly preferably 0.75 to 0.85. The viscosity of the polyorganosiloxane is usually 1,000 to 12,500 cs (centi-stocus) at a temperature of 25 ° C., preferably 1,500 to 12,000 cs, and particularly preferably 2,000 to 10,000 cs. is there. When a polyorganosiloxane having a viscosity of less than 1,000 cs is used, the effect of improving the dripping property when the resin burns is insufficient. On the other hand, when it exceeds 12,500 cs, the polyorganosiloxane is not uniformly dispersed in the composition, and the effect of improving the drip property is rather deteriorated.

In the present invention, a dechlorination inhibitor generally used in the field of polyvinyl chloride resins and chlorinated polyethylene is blended (added) in order to improve the thermal stability of the resin composition. It The dechlorination inhibitor is described as a stabilizer for vinyl chloride on pages 171 to 282 of "Handbook of Vinyl Chloride Materials" edited by the Japan Association of Vinyl Chloride Products (1966, published by Industrial Research Institute Co., Ltd.). Of these dechlorination inhibitors, organotin compounds are preferred. Typical examples of the organic tin compound include dibutyl tin dilaurate, dibutyl tin malate, octyl tin compound, dimethyl tin compound, dibutyl tin laurate malate complex, stannane diol derivative and mercapto. Examples include tin compounds and mixtures containing these organotin stabilizers as main components.

(H) Composition Ratio Chlorinated polyethylene, polyvinyl chloride resin of the present invention,
The composition ratio in the total amount of the polymer substance composed of a copolymer resin of styrene and acrylonitrile and a copolymer resin of α-methylstyrene and acrylonitrile is 5 to 25% by weight of chlorinated polyethylene and 8 to 25% by weight. Is preferable, and 8 to 22% by weight is preferable. If the composition ratio of the chlorinated polyethylene in the total amount of the polymeric substances is less than 5% by weight, not only the impact resistance of the obtained composition is poor, but also dripping is likely to occur during combustion, which causes a problem in combustibility. There is. On the other hand, when it exceeds 25% by weight, the resulting composition has low rigidity and poor moldability.

The composition ratio of the polyvinyl chloride resin in the total amount of the polymeric substances is 1.0 to 20% by weight, preferably 1.5 to 18% by weight, more preferably 2.0 to 20% by weight.
15% by weight is preferred. If the composition ratio of the polyvinyl chloride resin in the total amount of the polymeric substances is less than 1.0% by weight, a large amount of bromine-containing reaction product is required to develop a high degree of flame retardance, and the impact resistance is high. Sex decreases. On the other hand, 2
If it exceeds 0% by weight, the thermal stability of the resulting composition is lowered.

Further, the composition ratio of the other composition components to the total amount of 100 parts by weight of the polymer substance is as follows.
1. The bromine-containing reaction product is 0.5 to 25 parts by weight, and 2.
0 to 25 parts by weight is preferable, and 1.0 to 20% by weight is particularly preferable. When the content of the bromine-containing reaction product is less than 0.5 part by weight, a large amount of polyvinyl chloride resin is required for exhibiting a high degree of flame retardancy, resulting in a decrease in thermal stability. On the other hand, if it exceeds 20 parts by weight, the impact resistance decreases.

In antimony oxide, at most 10
The amount is 0.1 to 10 parts by weight, preferably 0.5 to 7.0 parts by weight. If the composition ratio of antimony oxide is more than 10 parts by weight based on 100 parts by weight of the total amount of the polymer substance, there is a problem in cost.

Further, the polyorganosiloxane is 0.05 to 5.0 parts by weight, and 0.05 to 3.0 parts by weight.
Part by weight is preferable, and 0.1 to 3.0 parts by weight is particularly preferable. If the composition ratio of the polyorganosiloxane is less than 0.05 part by weight, the effect of preventing dripping during combustion will not be exhibited. On the other hand, if it exceeds 5.0 parts by weight, not only the mechanical strength of the composition decreases, but also bleeding occurs on the surface of the molded product.

Further, the composition ratio of the αAS resin in the total amount of the AS resin and the αAS resin is 3 to 80% by weight, preferably 5 to 60% by weight, particularly preferably 5 to 50% by weight. When the composition ratio of the αAS resin in the total amount of the AS resin and the αAS resin is less than 3% by weight, the impact resistance of the obtained composition is lowered and the boss cracking resistance during insert molding is not improved. On the other hand, if it exceeds 80% by weight, moldability is poor.

Further, the content of halogen in the total amount of the polymer substance and the bromine-containing reaction product is 5.0 to 25.
% By weight, preferably 5.0 to 23% by weight, and particularly preferably 8.0 to 23% by weight. When the halogen content of the polymer substance and the bromine-containing reaction product is less than 5.0% by weight, the flame retardancy of the resulting composition is insufficient. On the other hand, 25
When the content is more than 10% by weight, not only is the impact resistance of the resulting composition insufficient, but there is a problem in terms of thermal stability.

When a dehydrochlorination inhibitor is added,
The composition ratio is at most 15 parts by weight, preferably 12 parts by weight or less, more preferably 10 parts by weight or less, based on 100 parts by weight of the total amount of the polymer substance. If the amount is more than 15 parts by weight, there is a problem in cost.

In producing the composition of the present invention, a chlorinated polyethylene, a polyvinyl chloride resin, a copolymer resin of styrene and acrylonitrile, a polymer substance of a copolymer resin of α-methylstyrene and acrylonitrile, and a bromine-containing substance. Although the object can be achieved by uniformly blending the reaction product and the polyorganosiloxane or these with an antimony oxide and / or a dehydrochlorination inhibitor, the heat which is widely used in the field of the above-mentioned polymeric substances. Additives such as stabilizers for oxygen and light, fillers, colorants, lubricants, plasticizers and antistatic agents within a range that does not substantially impair the characteristics of the composition of the present invention depending on the purpose of use of the composition. May be added in. In producing the composition, all the composition components may be mixed at the same time, or a part of the composition components may be mixed in advance, and the resulting mixture may be mixed with the remaining composition components.

As a mixing method, a method of dry blending using a mixer such as a Henschel mixer which is generally used in the field of synthetic resins, and a mixer such as an open roll, an extrusion mixer, a kneader and a Banbury are used. There is a method of mixing while melting. Among these mixing methods, two or more kinds of these mixing methods may be used together in order to obtain a more uniform composition (for example, after dry blending in advance, the mixture is mixed and melted). Among them, when using a dry blend together, even when using one or more melt kneading method in combination, in producing a molded product by the molding method described below, it is manufactured into pellets by using a pelletizer and used. Preferably.

Among the above-mentioned mixing methods, it is necessary to carry out at a temperature at which the polymer substance used is melted, regardless of whether it is melt-kneaded or molded by the molding method described later. However, if it is carried out at a high temperature, the polymer substance may cause thermal decomposition or deterioration such as dehydrochlorination, so that it needs to be carried out at 220 ° C. or lower.

The composition of the present invention is molded into a desired shape by applying molding methods such as injection molding method, extrusion molding method, compression molding method and blow molding method which are generally used in the field of synthetic resins. May be. Further, after being formed into a sheet using an extrusion molding machine, this sheet may be formed into a desired shape by a secondary processing method such as a vacuum forming method or a pressure forming method.

[0025]

The present invention will be described in more detail with reference to Examples. In the examples and comparative examples, the melt flow index (hereinafter referred to as “MFR”) is JI.
It was measured according to SK7210 at a temperature of 200 ° C. and a load of 5 kg. Furthermore, Izod impact strength is ASTM D2
According to 56, the measurement was performed with a notch at a temperature of 23 ° C. In the thermal stability test, the appearance change was visually evaluated after leaving the sample for 15 minutes at a pressure of 100 kg / cm ² G between the press plates set at a temperature of 240 ° C. Those with "" are represented by "Δ", and those with remarkable changes are represented by "X". The insert boss cracking time of the molded product was a heat cycle test of -20 ° C to + 60 ° C / 12 hours, and the time until the occurrence of boss cracking was measured. The flame retardancy test was performed according to the combustion test method defined in UL Standard 94 of the United States. Further, the light resistance was determined by a color difference meter by setting the color tone after exposing a test piece prepared by injection molding for 100 hours in a sunshine weather meter machine to ΔE.

The chlorinated polyethylene, polyvinyl chloride resin, AS resin, αAS resin, bromine-containing reaction product, polyorganosiloxane, antimony oxide and dehydrochlorination inhibitor used in Examples and Comparative Examples and comparative Other bromine products used for production methods, types,
The physical properties are shown below.

[(A) Chlorinated Polyethylene] As the chlorinated polyethylene, the copolymerization ratio of butene-1 is 3.0% by weight, the density is 0.940 g / cm ³ , and the average molecular weight is about 150,000. Produced by chlorinating the ethylene-butene-1 copolymer in an aqueous suspension with a chlorine content of 30.5% by weight and a Mooney viscosity (ML _{1 + 4} , 100 ° C.) of 110. And the chlorine content produced by using the above-mentioned ethylene-butene-1 copolymer and chlorinated polyethylene (hereinafter referred to as "CPE (A)") in which the residual crystal amount of polyethylene is 7.15% by weight. Is 20.8% by weight, and the Mooney viscosity (M
L _{1 + 4} , 100 ° C.) was 128 and the residual crystal amount of polyethylene was 15.3% by weight (hereinafter referred to as “CPE (B)”).

[(B) Polyvinyl Chloride Resin] Further,
As a polyvinyl chloride resin, a vinyl chloride-ethylene copolymer having a copolymerization ratio of ethylene of 1.5% by weight and an average degree of polymerization of about 650 (hereinafter referred to as "PVC (1)").
And a vinyl chloride homopolymer having an average degree of polymerization of about 600 (hereinafter referred to as “PVC (2)”).

[(C) AS Resin] As the AS resin, an acrylonitrile-styrene copolymer having a copolymerization ratio of acrylonitrile of 23% by weight and a weight average molecular weight of about 120,000 was used.

[(D) αAS Resin] As the αAS resin,
An acrylonitrile-α-methylstyrene copolymer having a copolymerization ratio of acrylonitrile of 21% by weight and a weight average molecular weight of about 90,000 was used.

[(E) Bromine-containing reaction product] Further, as a bromine-containing reaction product, any of the bromine-containing reaction products in which R ¹ is a hydrogen atom and R ² is a methyl group in the above formula (II) A product [average molecular weight: about 2,000, bromine content: 56% by weight, hereinafter referred to as "bromine product (1)"] was used. For comparison, tetrabromobisphenol A [hereinafter referred to as "bromine (2)"] was used.

[(F) Antimony Oxide] As antimony oxide, antimony trioxide (hereinafter referred to as “Sb ₂ O ₃ ”) and antimony pentoxide (hereinafter referred to as “Sb ₂ O ₅ ”) were used.

[(G) Polyorganosiloxane] Further, as the polyorganosiloxane, the average viscosity (25
C) about 5,000 cs polydimethylsiloxane [hereinafter referred to as "SH (1)"] and average viscosity (25
Polydimethylsiloxane having a temperature of about 1,000 cs (hereinafter referred to as "SH (2)") was used.

[(H) Dehydrochlorination inhibitor] Further, as dehydrochlorination inhibitors, dibutyl tin malate (hereinafter referred to as "St BM") and dioctyl tin malate (hereinafter referred to as "St OM") Was used).

Examples 1 to 4 and Comparative Examples 1 to 7 Chlorinated polyethylenes, polyvinyl chloride resins, AS resins, αAS resins, the types and amounts of which are shown in Table 1,
The bromine-containing reaction product, antimony oxide, polyorganosiloxane, and dehydrochlorination inhibitor were dry blended for 5 minutes using a Henschel mixer. The obtained mixture was kneaded using a vented single-screw extruder (diameter 40 mm) in which the cylinder temperature was set to 190 ° C. to produce each composition (pellet). MFR of each obtained pellet
Was measured. The results are shown in Table 2. In addition, each pellet is injection molded and Izod impact strength (notched)
And a sample for flame retardancy test (thickness 1.6 mm (1/1
6 inch)) and a metal insert molding for boss crack evaluation. The results of measuring them are shown in Table 2. In addition, Table 1 shows the halogen content in the total amount of the polymer material such as chlorinated polyethylene and the bromine-containing reaction product.

[0036]

[Table 1]

[0037]

[Table 2]

From the above results, the resin composition obtained according to the present invention is not only excellent in light resistance, flame retardancy and impact resistance and has good thermal stability during molding, but also particularly during insert molding. It is clear that it has excellent boss crack resistance.

[0039]

INDUSTRIAL APPLICABILITY The resin composition obtained according to the present invention can be used in various fields as described below in order to exert good effects as described above. (1) Television receiver housing (2) Computer equipment housing (3) Electric equipment and electronic equipment such as facsimile and audio equipment (4) Household appliances housing

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location // (C08L 25/12 23:28 25:16 27:06 83:04) (72) Inventor Katsuyoshi Abe 3-2 Chidori-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Akira Kawasaki Plastic Research Laboratory

Claims (1)

Claims: 1. (A) Chlorinated polyethylene having a chlorine content of 15 to 45% by weight, (B) polyvinyl chloride resin, (C) copolymer resin of styrene and acrylonitrile, (D) a copolymer resin of α-methylstyrene and acrylonitrile, (E) a molecular weight of 1,200 to 6,000 obtained by reacting a bromine-containing epoxy compound with 1,3,5-tribromophenol And a composition comprising bromine-containing reaction product having a bromine content of 5.0 to 60% by weight, (F) antimony oxide and (G) polyorganosiloxane, (A), (B), ( The composition ratio of the components (C) and (D) in the total amount is such that the component (A) is 5 to 25% by weight and the component (B) is 1.0 to 20.
The composition ratio of the other component to the total amount of 100 parts by weight of each of the components (A), (B), (C) and (D) is 0.5 to 25 parts by weight for the component (E). Yes, the (F) component is at most 10 parts by weight, and the (G) component is 0.05
To 5.0 parts by weight, the proportion of the component (D) in the total amount of the components (C) and (D) is 3 to 80% by weight, and (A), (B), ( The content of halogen in the total amount of C), (D) and (E) components is 5.0 to 2
Resin composition which is 5% by weight.