JPH06192514A - Flame-retardant resin composition - Google Patents

Abstract

PURPOSE:To provide a composition prepared by admixing a flame retardant with a specified copolymer of a halogen-containing vinyl monomer and vinyl cyanide, etc., excellent in moldability, impact resistance and autodigestion, low in bleeding of the flame retardant and excellent in global environmental pollution. CONSTITUTION:The flame-retardant resin composition excellent in moldability, impact resistance and autodigestion is obtained by blending (B) 0 to 30 pts.wt. flame retardant (e.g. antimony trioxide) with (A) 100 pts.wt. resin composition prepared by mixing (i) 0 to 100wt.% rubber-reinforced resin synthesized by copolymerizing 95 to 30 pts.wt. monomer mixture composed of 0 to 40wt.% halogen-containing vinyl monomer, 0 to 60wt.% vinyl cyanide and 10 to 0wt.% aromatic vinyl monomer, etc., in the presence of 5 to 70 pts.wt. rubbery polymer, (ii) 0 to 100wt.% copolymer synthesized by polymerizing a monomer mixture composed of 10 to 50wt.% halogen-containing vinyl monomer, 0 to 60wt.% vinyl cyanide, 90 to 0wt.% aromatic vinyl monomer, etc., and (iii) 0 to 70wt.% copolymer synthesized by polymerizing a monomer mixture composed of 40 to 100wt.% aromatic vinyl monomer 60 to 0wt.% vinyl cyanide, etc.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention is excellent in moldability (fluidity) and impact resistance, and is also excellent in self-extinguishing property, and has little bleed-out of the flame retardant. It is hard to generate harmful gas such as furan,
The present invention relates to a flame-retardant resin composition that does not pollute the environment and is friendly to the global environment.

[0002]

2. Description of the Related Art Heretofore, a thermoplastic resin endowed with impact resistance by a rubber-like polymer is well known as a resin generally called ABS resin. The thermoplastic resin imparted with such impact resistance may be required to have flame retardancy depending on the application. This is especially true when used as articles such as household products, electric appliances, office automation equipment, products such as automobiles, and building materials. A known method for imparting flame retardancy to these thermoplastics, including ABS resins, consists in blending a flame retardant, often such brominated diphenyl oxide compounds or Those containing a brominated polycarbonate compound are used. However, these flame retardants have an excellent flame retarding effect when blended with antimony trioxide, but in order to impart an excellent flame retarding effect, it is necessary to add a large amount of flame retardant. If bleed out problems arise. In addition, increasing the amount of flame retardant added to achieve a high level of flame retardancy increases the problem of bleed-out and increases the amount of harmful substances such as dioxins and furans generated during molding and combustion. However, there is also a problem that it adversely affects the global environment. Therefore, it is desired to achieve excellent flame retardancy with a small amount of halogen.

[0003]

DISCLOSURE OF THE INVENTION The present invention prevents the bleed-out of a flame retardant and imparts high flame retardancy by copolymerizing a halogen-containing vinyl monomer monomer such as bromostyrene into a resin. It has excellent moldability (fluidity) and impact resistance, and has excellent self-extinguishing property. Moreover, it does not easily generate harmful gases such as dioxins and furans during combustion and incineration, thus polluting the environment. The present invention aims to provide a flame-retardant resin composition that is friendly to the global environment.

[0004]

The present invention is characterized by containing 0 to 30 parts by weight of the following component (B) with respect to 100 parts by weight of the following component (A). Component (A): 0 to 100% by weight of the following rubber-reinforced resin (A-1), 0 to 100% by weight of the following copolymer (A-2) and 0 to 70% by weight of the following copolymer (A-3). %, (A
-1), the total amount of (A-2) and (A-3) components is 1
The content of the halogen-containing vinyl monomer (b-1) copolymerized in the component (A) is 1 to 40.
The content of the vinyl cyanide monomer (b-2) copolymerized in the component (A) is 30 to 50% by weight.
% Copolymer composition, component (A-1): halogen-containing vinyl monomer (b-1) 0 to 4 in the presence of rubber polymer (a) 5 to 70 parts by weight.
0% by weight, vinyl cyanide monomer (b-2) 0 to 60% by weight, and selected from the group consisting of aromatic vinyl monomers, acrylic acid esters, unsaturated acid anhydrides and maleimide-based monomers. At least one monomer (b-3) 10
Monomer mixture (b) consisting of 0 to 0% by weight ((b) =
(B-1) + (b-2) + (b-3)) 95 to 30 parts by weight ((a) + (b) = 100 parts by weight) of a rubber-reinforced resin obtained by polymerization, (A-2 ) Component: halogen-containing vinyl monomer 10 to 50
Weight% (b-1), vinyl cyanide monomer (b-2) 0
To 60 parts by weight, and at least one monomer selected from the group consisting of aromatic vinyl monomers, acrylic acid esters, unsaturated acid anhydrides and maleimide-based monomers (b-
3) A copolymer obtained by polymerizing a monomer mixture consisting of 90 to 0 parts by weight, (A-3) component: 40 to 100% by weight of an aromatic vinyl monomer, and a vinyl cyanide monomer ( b-2), copolymerizing a monomer mixture consisting of 60 to 0% by weight of at least one monomer selected from the group consisting of acrylic acid ester, unsaturated acid anhydride and maleimide-based monomer. The resulting copolymer, component (B): provides a flame retardant aid.

Further, the present invention is characterized by containing 0 to 30 parts by weight of the following component (B) with respect to 100 parts by weight of the following component (A), (A) ) Component: 5 to 100% by weight of the following rubber-reinforced resin (A-1), 0 to 95% by weight of the following copolymer (A-2) and 0 to 70% by weight of the following copolymer (A-3), (A-
1), the total amount of (A-2) and (A-3) components is 10
0% by weight, the content of the halogen-containing vinyl monomer (b-1) copolymerized in the component (A) is 1 to 40% by weight, and it is copolymerized in the component (A). Content of vinyl cyanide monomer (b-2) is 0 to 50% by weight
A copolymer composition which is, (A-1) component: the following (A-1-) component, the following (A-)
1-) component and at least one rubber-reinforced resin selected from the following (A-1-) component: (A-1-) component: a rubber-like polymer (a having a gel content of 2 to 30% by weight). ) In the presence of 5 to 70 parts by weight, 0 to 40% by weight of the halogen-containing vinyl monomer (b-1), 0 to 60% by weight of the cyanide vinyl monomer (b-2), and the aromatic vinyl monomer. Monomer mixture (b-3) consisting of 100 to 0% by weight of at least one monomer (b-3) selected from the group consisting of monomers, acrylic acid esters, unsaturated acid anhydrides and maleimide-based monomers. ) ((B) = (b-1) + (b-
2) + (b-3)) 95 to 30 parts by weight ((a) + (b)
= 100 parts by weight), a rubber-reinforced resin obtained by polymerizing (A-1-) component: in the presence of 5 to 70 parts by weight of a diene polymer (a) having a vinyl bond content of 10 to 70% by weight. In addition, 0 to 40% by weight of halogen-containing vinyl monomer (b-1), 0 to 60% by weight of vinyl cyanide monomer (b-2), aromatic vinyl monomer, acrylic ester, and unsaturated At least one monomer (b-3) 10 selected from the group consisting of acid anhydrides and maleimide-based monomers
Monomer mixture (b) consisting of 0 to 0% by weight ((b) =
(B-1) + (b-2) + (b-3)) 95 to 30 parts by weight ((a) + (b) = 100 parts by weight) of a rubber-reinforced resin obtained by polymerization, (A-1 -) Component: halogen-containing vinyl monomer (b-1) 0 in the presence of 5 to 70 parts by weight of the rubber-like polymer (a).
-40% by weight, vinyl cyanide monomer (b-2) 0-6
0% by weight, and at least one monomer (b-3) 1 selected from the group consisting of aromatic vinyl monomers, acrylic acid esters, unsaturated acid anhydrides and maleimide-based monomers.
Monomer mixture (b) ((b) =
(B-1) + (b-2) + (b-3)) obtained by polymerizing 95 to 30 parts by weight ((a) + (b) = 100 parts by weight) and having a graft ratio of 5 to 30. % Of rubber-reinforced resin, component (A-2): halogen-containing vinyl monomer 10-50
Parts by weight (b-1), vinyl cyanide monomer (b-2) 0
To 60 parts by weight, and at least one monomer (b-3) 9 selected from the group consisting of aromatic vinyl monomers, acrylic acid esters, acid anhydrides and maleimide-based monomers.
A copolymer obtained by polymerizing a monomer mixture consisting of 0 to 0 parts by weight, (A-3) component: 40 to 100 parts by weight of an aromatic vinyl monomer, and a vinyl cyanide monomer (b- 2) Copolymer obtained by copolymerizing a monomer mixture consisting of 60 to 0 parts by weight of at least one monomer selected from the group consisting of acrylic acid ester, acid anhydride and maleimide-based monomer. Combined, (B) component: A flame retardant auxiliary agent is provided.

Further, the present invention provides the flame-retardant resin composition according to claim 1 or 2, wherein the halogen-containing vinyl monomer (b-in the components (A-1) and (A-2)).
As a 1), bromostyrene consisting of 0 to 15% by weight of monobromostyrene, 80 to 100% by weight of dibromostyrene and 0 to 10% by weight of tribromostyrene is used, and a single amount of vinyl cyanide copolymerized in the component (A). Body (b-
(C) with respect to 100 parts by weight of the flame-retardant resin composition according to any one of claims 1 to 3, wherein the content of 2) is 0 to 60% by weight. As a component, at least one compound selected from the group consisting of iron-containing compounds, silicon-containing compounds and hydroxyl-containing compounds is used.
A flame-retardant resin composition containing 005 to 30 parts by weight is provided.

First, the invention of claim 1 will be described.
The component (A) of the invention of claim 1 is the rubber-reinforced resin (A
-1) 0 to 100% by weight, the above copolymer (A-2) 0 to
100% by weight, and the above copolymer (A-3) 0 to 70
% Of (A-1), (A-2) and (A-
3) The total amount of the components is 100% by weight, and the halogen-containing vinyl monomer (b- is copolymerized in the component (A).
The content of 1) is 1 to 40% by weight, and the content of the vinyl cyanide monomer (b-2) component copolymerized in the component (A) is 30 to 50% by weight. It is a polymer composition.

The component (A-1) is 5 to 70 parts by weight, preferably 10 to 60 parts by weight of the rubber-like polymer (a),
More preferably, in the presence of 15 to 50 parts by weight, the halogen-containing vinyl monomer (b-1) is 0 to 40% by weight, preferably 5 to 18% by weight, more preferably 10 to 15% by weight, vinyl cyanide. 0 to 60% by weight of the monomer (b-2),
Preferably 5 to 50% by weight, more preferably 15 to 4
5% by weight, and at least one monomer (b-3) selected from the group consisting of aromatic vinyl monomers, acrylic acid esters, unsaturated acid anhydrides and maleimide-based monomers.
100 to 0% by weight, preferably 90 to 32% by weight, and more preferably 75 to 30% by weight of the monomer mixture (b) ((b) = (b-1) + (b-2) + (b −
3)) 95 to 30 parts by weight, preferably 90 to 40 parts by weight, more preferably 85 to 50 parts by weight ((a) +
It is a rubber-reinforced resin obtained by polymerizing (b) = 100 parts by weight).

If the content of the rubber-like polymer (a) in the rubber-reinforced resin (A-1) is less than 5 parts by weight, the impact resistance is low, and if it exceeds 70 parts by weight, the graft ratio and the surface of the resin are low. Gloss and flame retardance are reduced. The content ratio of the halogen-containing vinyl monomer (b-1) in the monomer mixture (b) is 4
If it exceeds 0% by weight, impact resistance is poor, and if the content ratio of the vinyl cyanide monomer (b-2) exceeds 50% by weight, thermal stability during molding is poor. As the monomer (b-3) in the monomer mixture (b), the content of the aromatic vinyl monomer is preferably 40 to 90% by weight, more preferably 60 to 85% by weight. %, Particularly preferably 65 to 80% by weight. When the content ratio of the aromatic vinyl copolymer is within this range, the moldability and the appearance of the molded product are further improved.

The graft ratio of the rubber-reinforced resin (A-1) is preferably 5 to 150%, more preferably 8%.
~ 120%. If it is less than 5%, the impact resistance decreases, and 1
If it exceeds 50%, dripping (melt dripping) during combustion tends to occur. The intrinsic viscosity [η] (measured in methyl ethyl ketone at 30 ° C., the same applies hereinafter) of the matrix resin of the rubber-reinforced resin (A-1) is preferably 0.1.
1.5 dl / g, more preferably 0.3 to 1 d
1 / g. If [η] is less than 0.1 dl / g, impact strength is not sufficiently expressed, and if it exceeds 1.5 dl / g, moldability is deteriorated. Here, the matrix resin is a resin component other than the grafted rubber component in the rubber-reinforced resin (A-1), and the intrinsic viscosity [η] is the methyl ethyl ketone in the rubber-reinforced resin (A-1). It is a value obtained by measuring the dissolved content according to a conventional method.

Examples of the rubber-like polymer (a) include polybutadiene, butadiene-styrene copolymer, butadiene-bromostyrene copolymer, polyisoprene, butadiene-acrylonitrile copolymer, ethylene-propylene- (diene) copolymer. Coalesce, isobutylene-isoprene copolymer, acrylic rubber, styrene-butadiene-styrene block copolymer, styrene-butadiene-styrene radial teleblock copolymer, styrene-isoprene-
Examples thereof include a styrene block copolymer, a hydrogenated diene (block) copolymer such as SEBS, polyurethane rubber, and silicone rubber. Among these, polybutadiene, butadiene-styrene copolymer, ethylene-propylene (diene) copolymer and silicone rubber are preferable.

As the halogen-containing vinyl monomer (b-1), pentabromobenzyl acrylate, tribromophenylmaleimide, N- (p-bromophenyl) maleimide, N- (p-chlorophenyl) maleimide, monobromostyrene, Examples include dibromostyrene, tribromostyrene, chlorostyrene and dichlorostyrene. Of these, dibromostyrene is most preferred. A mixture of these halogen-containing vinyl monomers can also be used.

Examples of the vinyl cyanide monomer (b-2) include acrylonitrile and methacrylonitrile. Of these, acrylonitrile is preferred.

The above-mentioned monomer (b-3) is at least one monomer selected from the group consisting of aromatic vinyl monomers, acrylic acid esters, acid anhydrides and maleimide-based monomers. . Examples of the aromatic vinyl monomer include styrene, α-methylstyrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, chlorostyrene,
Dichlorostyrene, α-ethylstyrene, methyl-α-
Examples include methyl styrene and dimethyl styrene.
Among these, styrene, α-methylstyrene, p
-Methylstyrene is preferred.

Examples of the acrylic acid ester include methyl acrylate, ethyl acrylate, methyl methacrylate,
Examples thereof include butyl acrylate and butyl methacrylate. Of these, methyl methacrylate and butyl acrylate are preferred.

Maleic anhydride is preferred as the unsaturated acid anhydride. Examples of the maleimide-based monomer include maleimide, N-phenylmaleimide, N-methylmaleimide, N-ethylmaleimide, N-propylmaleimide, N-isopropylmaleimide and N-cyclohexylmaleimide. Of these, maleimide, N-phenylmaleimide and N-cyclohexylmaleimide are preferred.

Examples of the polymerization method of the rubber-reinforced resin (A-1) include bulk polymerization method, solution polymerization method, suspension polymerization method and emulsion polymerization method. Among the above components (A-1), the following types of rubber-reinforced resins are preferable. A rubber-reinforced resin obtained by copolymerizing bromostyrene, acrylonitrile and styrene in the presence of the rubber-like polymer (a), and bromostyrene and styrene in the presence of the rubber-like polymer (a). A rubber-reinforced resin obtained by copolymerizing styrene and acrylonitrile in the presence of a rubber-like polymer (a), and a styrene copolymerizing in the presence of a rubber-like polymer (a) A rubber-reinforced resin obtained by

The component (A-2) is 10 to 50% by weight, preferably 20% by weight of the halogen-containing vinyl monomer (b-1).
-45 wt%, more preferably 25-40 wt%, vinyl cyanide monomer (b-2) 0-60 wt%, preferably 10-55 wt%, more preferably 20-50 wt%, and aroma. 90 to 0 parts by weight, preferably 70 to 10 parts by weight of at least one monomer (b-3) selected from the group consisting of group vinyl monomers, acrylic acid esters, acid anhydrides and maleimide-based monomers. Parts, more preferably 55 to 20 parts by weight of a monomer mixture copolymerized.

When the content of the halogen-containing vinyl monomer (b-1) in the copolymer (A-2) is less than 10 parts by weight, the flame retardancy is insufficient and 50 parts by weight is added. If it exceeds, the impact resistance becomes low. When the vinyl cyanide monomer (b-2) in the copolymer (A-2) exceeds 50 parts by weight, the thermal stability at the time of molding becomes poor. Monomer (b) in copolymer (A-2)
-3), the content ratio of the aromatic vinyl monomer is 50.
To 90 parts by weight, more preferably 60
To 85 parts by weight, particularly preferably 65 to 80 parts by weight. When the content ratio of the aromatic vinyl copolymer is within this range, the moldability and the appearance of the molded product are further improved.

The intrinsic viscosity [η] of the copolymer (A-2) is
It is preferably 0.1 to 1.5 dl / g, and more preferably 0.3 to 1 dl / g. [Η] is 0.1 dl
If it is less than / g, the impact strength is not sufficiently expressed, and
When it exceeds 5 dl / g, moldability (particularly fluidity) is lowered.

The halogen-containing vinyl monomer (b-1), vinyl cyanide monomer (b-2) and monomer (b-3) which are the respective components of the copolymer (A-2) are Above (A-1)
It is almost the same as the halogen-containing vinyl monomer (b-1), vinyl cyanide monomer (b-2) and monomer (b-3) used as each component.

Examples of the method for polymerizing the copolymer (A-2) include bulk polymerization method, solution polymerization method, suspension polymerization method and emulsion polymerization method. As a particularly preferable polymerization method, after the emulsion polymerization reaction is started using 0 to 40 parts by weight of the monomer mixture, 100 to 60 parts by weight of the remaining monomer mixture are continuously added in equal amounts, and A method of performing the polymerization by a batch-increment polymerization method, in which the polymerization is performed at a rate lower than the formation rate, and the polymerization is performed until the polymerization addition rate becomes 80% or more. The copolymer (A-
In 2), the halogen-containing vinyl monomer is more uniformly incorporated in the copolymer as compared with the copolymer synthesized by the one-step batch polymerization method, and further has an excellent flame retardancy imparting effect. There is.

Among the above components (A-2), the following types of copolymers are preferable. Copolymers obtained by copolymerizing bromostyrene, acrylonitrile and styrene, and copolymers obtained by copolymerizing bromostyrene and acrylonitrile.

The component (A-3) is 40 to 100% by weight of the aromatic vinyl monomer, preferably 60 to 90% by weight,
More preferably, it is 65 to 80% by weight and at least one kind of monomer selected from the group consisting of vinyl cyanide monomer (b-2), acrylic acid ester, unsaturated acid anhydride and maleimide-based monomer. 60 to 0% by weight, preferably 50
It is a copolymer obtained by copolymerizing a monomer mixture of 10 to 10% by weight, more preferably 45 to 20% by weight.

If the content of the aromatic vinyl monomer in the copolymer (A-3) is less than 40% by weight, the moldability will be poor. At least one monomer selected from the group consisting of vinyl cyanide monomer (b-2), acrylic acid ester, acid anhydride and maleimide-based monomer in the copolymer (A-3). If the content ratio of the above exceeds 60% by weight, the moldability and the color tone are deteriorated. The intrinsic viscosity [η] of the copolymer (A-3) is preferably 0.1 to 1.5 dl / g, and more preferably 0.3 to 1 dl / g.
If [η] is less than 0.1 dl / g, impact strength is not sufficiently expressed, and if it exceeds 1.5 dl / g, moldability is deteriorated.

Aromatic vinyl monomer, vinyl cyanide monomer (b-2), which is each component of the above copolymer (A-3),
The acrylic acid ester, the acid anhydride and the maleimide-based monomer are the aromatic vinyl monomer, vinyl cyanide monomer (b-2) and acrylic acid ester used as the respective components of the component (A-1). The unsaturated acid anhydride and the maleimide-based monomer are almost the same.

Examples of the polymerization method of the copolymer (A-3) include bulk polymerization method, solution polymerization method, suspension polymerization method and emulsion polymerization method. Among the components (A-3), the following types of copolymers are preferable. A copolymer obtained by copolymerizing styrene and acrylonitrile, and a copolymer obtained by copolymerizing styrene, acrylonitrile and N-phenylmaleimide.

The copolymer composition (A) of the invention of claim 1 has the following combinations. Component (A-1), Component (A-2) and Component (A-3)
Component (A-1) and component (A-2), Component (A-1) and (A-3), Component (A-2) and (A-2) A component consisting of A-3), a component consisting of only (A-1), and a component consisting of (A-2).

Specifically, the above rubber reinforced resin (A-1)
0 to 100% by weight, preferably 10 to 60% by weight, more preferably 20 to 50% by weight, the above copolymer (A-
2) 0-100% by weight, preferably 40-90% by weight,
It is more preferably 45 to 80% by weight, and the copolymer (A-3) is 0 to 70% by weight, preferably 0 to 50% by weight, more preferably 0 to 40% by weight. If the amount of the copolymer (A-3) exceeds 70% by weight, the flame retardancy is insufficient.

The content of the rubbery polymer (a) in the above copolymer composition (A) is preferably 0 to 40% by weight, more preferably 5 to 30% by weight, particularly preferably 8 to 25% by weight. Is. If the content of the rubber-like polymer (a) exceeds 40% by weight, the flame retardancy will decrease.

The content of the halogen-containing vinyl monomer (b-1) copolymerized in the copolymer composition (A) is 1 to 40% by weight, preferably 5 to 20% by weight, It is more preferably 6 to 15% by weight. If the content of the halogen-containing vinyl monomer (b-1) is less than 1% by weight, a sufficient flame retarding effect cannot be obtained, and if it exceeds 40% by weight, impact strength is lowered.

One of the features of the present invention is that a specific amount of the vinyl cyanide monomer (b-2) is copolymerized in the copolymer composition (A). The vinyl cyanide monomer (b-2) copolymerized in the resin is cyclized during combustion to form a carbon noncombustible film (char). In the present invention, a high flame-retardant level can be obtained by the flame-retardant imparting effect of this carbon non-combustible film.

The content of the vinyl cyanide monomer (b-2) in the copolymer composition (A) is 30 to 50% by weight, preferably 35 to 45% by weight, more preferably 38 to 43% by weight. Is. When the content of the vinyl cyanide monomer (b-2) is in this range, more excellent flame retardancy can be obtained without significantly sacrificing moldability and color tone.

Typical examples of the above copolymer composition (A) include ABS resin as the component (A-1) and bromostyrene-styrene-acrylonitrile-as the component (A-2).
Examples include terpolymers and those using an AS resin having an acrylonitrile content of 35 to 45% by weight as the component (A-3). The copolymer composition (A) of claim 1 is It is not limited.

The component (B) of the invention of claim 1 is a flame retardant aid. The content of the flame retardant aid (B) is 0 to 30 parts by weight, preferably 1 to 20 parts by weight, and more preferably 2 to 15 parts by weight, relative to 100 parts by weight of the copolymer composition (A). Is. If the content of the flame retardant aid (B) exceeds 30 parts by weight, the impact resistance of the resin will be impaired.

As the flame retardant aid (B), antimony compounds, bismuth compounds, aluminum compounds,
Examples thereof include zinc compounds and boron compounds, and among them, antimony compounds are preferable. Specific examples of the antimony-based compound include antimony trioxide, antimony tetraoxide, (colloidal) antimony pentoxide, sodium antimonate, antimony phosphate, etc., among which antimony trioxide is preferred. In addition, flame retardancy can be imparted by using two or more of these flame retardant aids (B) together.

Next, the invention of claim 2 will be described. The flame-retardant resin composition of the invention of claim 2 is (A- in the copolymer composition (A) in the flame-retardant resin composition of claim 1.
The following rubber-reinforced resin is used as the component (1), and the content of the vinyl cyanide monomer (b-2) in the component (A) is 0 to 60% by weight.

Used in the above flame-retardant resin composition (A
The component (-1) includes the following component (A-1-) and the following component (A-1).
It is at least one kind of rubber-reinforced resin selected from the component (-) and the component (A-1-) below.

The component (A-1-) has a gel content of 2
In the presence of 5 to 70 parts by weight of the rubbery polymer (a), which is 30 to 30% by weight, the halogen-containing vinyl monomer (b-1) 0 to
40% by weight, vinyl cyanide monomer (b-2) 0-60
%, And at least one monomer (b-3) 1 selected from the group consisting of aromatic vinyl monomers, acrylic acid esters, unsaturated acid anhydrides and maleimide-based monomers.
Monomer mixture (b) ((b) =
(B-1) + (b-2) + (b-3)) 95 to 30 parts by weight ((a) + (b) = 100 parts by weight) is a rubber-reinforced resin obtained by polymerization. That is, the above (A-1-)
The component is the rubber-like polymer (a) used in the rubber-reinforced resin (A-1) of the invention of claim 1, and the gel content is 5 to 20% by weight.
The rubbery polymer (a) is The gel content of the rubber-like polymer (a) in this rubber-reinforced resin is 5 to 20% by weight, preferably 8 to 15% by weight, more preferably 10 to 13% by weight. Gel content is 5
If it is less than 20% by weight, the impact resistance is insufficient, and if it exceeds 20% by weight, the effect of preventing dripping is small. In the present invention, the “gel” is an insoluble component when the rubber-like polymer (a) is dissolved in a solvent such as methyl ethyl ketone or toluene.

The above component (A-1-) is composed of 5 to 10 parts by weight of the diene polymer (a) having a vinyl bond content of 10 to 70% by weight.
In the presence of 70 parts by weight, halogen-containing vinyl monomer (b
-1) 0-40% by weight, vinyl cyanide monomer (b-
2) 0 to 60% by weight, and at least one monomer selected from the group consisting of aromatic vinyl monomers, acrylic acid esters, unsaturated acid anhydrides and maleimide-based monomers ((b-3 ) 100 to 0% by weight of a monomer mixture (b) ((b) = (b-1) + (b-2) + (b-
3)) A rubber-reinforced resin obtained by polymerizing 95 to 30 parts by weight ((a) + (b) = 100 parts by weight). That is, the component (A-1-) has a vinyl bond content of 10% by weight to 70% by weight of the rubber-like polymer (a) used in the rubber-reinforced resin (A-1) of the invention of claim 1. It is a specific diene polymer. The vinyl bond content in this rubber copolymer is 10% by weight to 70% by weight, preferably 30% by weight to 65% by weight, and more preferably 45 to 6% by weight.
It is 0% by weight. If the vinyl bond content is less than 10% by weight, the effect of preventing dripping is small, and if it exceeds 70% by weight, the thermal stability during molding is poor.

The component (A-1-) is obtained by adding 0 to 40% by weight of a halogen-containing vinyl monomer (b-1) and vinyl cyanide in the presence of 5 to 70 parts by weight of the rubber-like polymer (a). 0 to 60% by weight of monomer (b-2), and at least one monomer selected from the group consisting of aromatic vinyl monomers, acrylic acid esters, unsaturated acid anhydrides and maleimide monomers. (B-3) 100 to 0% by weight of a monomer mixture (b) ((b) = (b-1) + (b-2) + (b-
3)) A rubber-reinforced resin obtained by polymerizing 95 to 30 parts by weight ((a) + (b) = 100 parts by weight) and having a graft ratio of 5 to 30% by weight. That is, the above (A-1
The component (-) is the rubber-reinforced resin (A-
The graft ratio of 1) is specified to be 5 to 30% by weight. The graft ratio in this rubber-reinforced resin is 5 to 30% by weight, preferably 8 to 25% by weight, more preferably 1
It is 0 to 20% by weight. If the graft ratio is less than 5% by weight, the impact resistance is insufficient, and if it exceeds 30% by weight, the dripping prevention effect is small.

These rubber-reinforced resins (A-1-),
(A-1-) and (A-1-) have a crosslinking point in the molecular structure. Therefore, upon combustion, these cross-linking points cause cross-linking reactions with various parts of the resin,
It suppresses the lowering of the molecular weight of the resin and promotes the molding of carbon incombustible film (char). U, the most typical combustion test
When the flammability of the flame-retardant resin composition according to claim 2 is evaluated by L-94 (V-test), the flame retardancy is improved,
Moreover, it can be seen that dripping (melt dripping) is prevented.

The component (A) in the flame-retardant resin composition according to the second aspect of the present invention is 5 to 100% by weight, preferably 10 to 100% by weight, and (A-2) 0 to 95. % By weight, preferably 0-90% by weight, and (A-3) 0-
It consists of 70% by weight. When the content of the component (A-1) is less than 5% by weight, sufficient impact resistance cannot be obtained.

The content of the halogen-containing vinyl monomer (b-1) copolymerized in the copolymer composition (A) is the same as that of the copolymer composition (A) of claim 1. -40% by weight, preferably 5-20% by weight, more preferably 6-15% by weight. If the content of the halogen-containing vinyl monomer (b-1) is less than 1% by weight, a sufficient flame retarding effect cannot be obtained, and if it exceeds 40% by weight, impact strength is lowered.

The content of the vinyl cyanide monomer (b-2) in the above copolymer composition (A) is 0 to 50% by weight, preferably 30 to 55% by weight, more preferably 35 to 45%.
%, Particularly preferably 38 to 43% by weight. When the content of the vinyl cyanide monomer (b-2) is in this range, more excellent flame retardancy can be obtained without significantly sacrificing moldability and color tone.

Used in the invention of claim 2 (A-
2), (A-3) and (B) components, and (b-
1), (b-2) and (b-3) components are claimed in Claim 1.
Used in the invention of (A-2), (A-3) and (B) component, (b-1), (b-2) and (b-
It is almost the same as the component 3).

Next, the invention of claim 3 will be described.
The flame-retardant resin composition of the invention of claim 3 is copolymerized with the component (A-1) and the component (A-2) of the flame-retardant resin composition of claim 1 or 2. As the halogen-containing vinyl monomer (b-1), monobromostyrene 0 to
Copolymerized in component (A) using bromostyrene consisting of 20 wt%, dibromostyrene 80-100 wt% and tribromostyrene 0-10 wt% (b-2).
The content of the components is 0 to 50% by weight. The bromostyrene is a mixture of 0 to 20 wt% monobromostyrene, 80 to 100 wt% dibromostyrene and 0 to 10 wt% tribromostyrene. When the composition ratio of monobromostyrene exceeds 20% by weight, many bromostyrene mixtures must be copolymerized when imparting flame retardancy to the resin, and the physical properties are likely to be impaired. When the composition ratio of tribromostyrene exceeds 10% by weight, the amount of heat generated during polymerization is large and the polymerization reaction cannot be suppressed. In addition, the copolymer obtained is inferior in thermal stability and light resistance during molding.

The flame-retardant resin composition of the invention of claim 4 is based on 100 parts by weight of the flame-retardant resin composition of the invention of claims 1 to 3 and contains an iron-containing compound and a silicon-containing compound as component (C). A flame-retardant resin composition comprising 0.005 to 30 parts by weight of at least one compound selected from the group consisting of and a hydroxyl group-containing compound. In the flame-retardant resin composition of the invention of claim 4, the addition of the component (C) as described above can improve the flame retardancy and can also obtain the dripping prevention effect.

The content of the component (C) is set in the range of claims 1 to 3.
100 parts by weight of the flame-retardant resin composition of the invention of 0.
005 to 30 parts by weight, preferably 0.5 to 25 parts by weight, more preferably 1 to 20 parts by weight. If the content of the component (C) is less than 0.005 parts by weight, not only sufficient flame retardancy cannot be imparted, but also sufficient dripping prevention effect cannot be obtained. Further, the content of the component (C) is 30
If it exceeds the weight part, the molding processability and impact resistance as a resin are lost. As the component (C), an iron-containing compound,
Examples thereof include silicon-containing compounds and hydroxyl-containing compounds.
Specific examples of the iron-containing compound include iron trioxide, iron trichloride, ferrocene, iron lactate and the like. In particular, iron lactate, which is an organic iron compound, has good dispersibility in a resin and is white in color, so that it is easy to handle when the resin is subsequently colored. Examples of the silicon-containing compound include silicone oil and silane coupling agents.
Specific examples of the silane coupling agent include γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldiketoxysilane, aminosilane, and γ.
-Methacryloxypropylmethyldimethoxysilane and the like. Examples of the hydroxyl group-containing compound include homopolymers and co-polymers of p-hydroxystyrene,
Pentaerythritol, Trishydroxyisocyanurate, Cellulose, 2,6, Sikylenol and its 2
Examples thereof include polymers and phenol resins (resole type and novolac type). Among these hydroxyl group-containing compounds,
Homopolymers and copolymers of p-hydroxysterene, phenolic resins (resole type, novolak type) and the like are preferable.

The flame-retardant resin composition according to claims 1 to 4 (hereinafter,
It is called the composition of the present invention. ), If necessary, AES
Resin, MBS resin, polycarbonate, PPS, PP
It is also possible to blend one or more polymers selected from O, POM, polyamide, PBT, PET, polyvinyl chloride, polyolefin, polyacetal, epoxy resin, polyurethane, vinylidene fluoride, HIPS, polystyrene and a thermoplastic elastomer. The preferred blending ratio of these polymers is the flame-retardant resin composition of the present invention / polymer = 5 to 80% by weight / 95 to 20% by weight. In particular, polycarbonate as these polymers,
PPS, PPO, POM, polyamide, PBT, PE
The flame retardancy of the composition of the present invention can be further improved by using T, polyvinyl chloride, polyacetal, epoxy resin or polyurethane.

Further, the flame-retardant resin composition of the present invention comprises
Stabilizers such as antioxidants and UV absorbers, if necessary
Silicone oil, lubricants such as low molecular weight polyethylene, calcium carbonate, talc, clay, titanium oxide, silica, magnesium carbonate, carbon black, barium sulfate, calcium oxide, aluminum oxide, mica, glass beads, metal filler, carbon fiber, etc. Fillers, dispersants, foaming agents, colorants and the like can be added.

The flame-retardant resin composition of the present invention is molded into a molded article by a molding method such as extrusion molding, injection molding or compression molding. These molded articles have flame retardancy and impact resistance. Since it has excellent practical moldability and a good surface appearance, articles such as household products, electric appliances and office automation equipment,
Very useful as products such as automobiles and building materials.

[0053]

The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples. (1) Production of rubber-reinforced resin (A-1): reflux condenser,
In a separable flask equipped with a thermometer and a stirrer, 30 parts by weight of polybutadiene rubber latex in terms of solid content, 65 parts by weight of deionized water, 0.3 part by weight of rosin acid soap, 4.2 parts by weight of dibromostyrene, styrene. 11.6
Parts by weight and 7.4 parts by weight of acrylonitrile, then 0.2 parts by weight of sodium pyrophosphate, 7 parts of ferrous sulfate.
A solution prepared by dissolving 0.01 part by weight of the hydrate and 0.4 part by weight of glucose in 20 parts by weight of deionized water was added. Then, 0.07 part by weight of cumene hydroperoxide was added to initiate polymerization, and after polymerization for 1 hour, 45 parts by weight of ion-exchanged water, 0.7 part by weight of rosin acid soap, 9.8 parts by weight of dibromostyrene, 27.0 parts by weight of styrene, 17.2 parts by weight of acrylonitrile and 0.01 part by weight of cumene hydroperoxide were continuously added over 2 hours, and the mixture was further polymerized for 1 hour to complete the reaction. Sulfuric acid was added to the obtained copolymer latex, coagulated, washed with water and dried to give a rubber-reinforced resin (A-
1) Example 3 was obtained. Further, rubber-reinforced resin (A-1) Examples 1, 2, 4 to 10 shown in Tables 1 and 2 were obtained by the same method according to the charging composition shown in Tables 1 and 2.

[0054]

[Table 1]

[Table 2]

(2) Production of copolymer (A-2): In a separable flask equipped with a reflux condenser, a thermometer and a stirrer, 250 parts by weight of deionized water, 3.0 parts by weight of potassium laurate, 10.5 parts by weight of dibromostyrene, 10.5 parts by weight of styrene, 9.0 parts by weight of acrylonitrile and 0.03 part by weight of t-dodecylmercaptan are added,
Next, a solution prepared by dissolving 0.05 part by weight of sodium ethylenediaminetetraacetate, 0.002 part by weight of ferrous sulfate heptahydrate and 0.1 part by weight of sodium formaldehyde sulfoxylate in 8 parts by weight of deionized water was added. . Then, 0.025 parts by weight of diisopropylbenzene hydroperoxide was added to initiate polymerization, and after polymerization for 1 hour, 24.5 parts by weight of dibromostyrene, 24.5 parts by weight of styrene, 21.0 parts by weight of acrylonitrile, 0.09 parts by weight of t-dodecyl mercaptan and 8 parts by weight of ion-exchanged water, 0.05 part by weight of sodium ethylenediaminetetraacetate, 0.002 part by weight of ferrous sulfate heptahydrate and 0.1 part by weight of sodium formaldehyde sulfoxylate. A solution in which parts were dissolved was continuously added over 1.5 hours, and polymerization was further performed for 1 hour to complete the reaction. Sulfuric acid was added to the obtained copolymer latex, coagulated, washed with water and dried to obtain a copolymer (A-2) example 1 shown in Table 3. Further, copolymers (A-2) Examples 2 to 4 shown in Table 3 were obtained by the same method according to the charging composition shown in Table 3.

[0056]

[Table 3]

(3) Production of copolymer (A-3): In a separable flask equipped with a reflux condenser, a thermometer and a stirrer, 250 parts by weight of deionized water, 3.0 parts by weight of potassium laurate, 76 parts by weight of styrene, 24 parts by weight of acrylonitrile and 0.1 part by weight of t-dodecyl mercaptan are added, and then sodium ethylenediaminetetraacetate of 0.1.
05 parts by weight, ferrous sulfate heptahydrate 0.002 parts by weight and sodium formaldehyde sulfoxylate 0.1
A solution in which 8 parts by weight of ion-exchanged water was dissolved was added. Then, 0.1 part by weight of diisopropylbenzene hydroperoxide was added to initiate polymerization, and the polymerization was completed for about 1 hour to complete the reaction. Sulfuric acid was added to the obtained copolymer latex to coagulate it, followed by washing with water and drying to obtain a copolymer (A-3) Example 1 shown in Table 4. Furthermore, Table 4
Copolymers (A-3) Examples 2 to 4 were obtained according to the charging composition shown in.

[0058]

[Table 4]

(4) Production of flame-retardant resin composition: Tables 5 to 8
The components shown in Fig.
Melt kneading was carried out in the range of ℃ to 240 ℃ to produce pellets. The obtained pellets were molded with a 50z injection molding machine at a molding temperature of 200 ° C to 240 ° C to prepare a test piece, and its physical properties were evaluated. Table 5 shows the evaluation results of physical properties.
8 shows. The methods for evaluating the physical properties are as follows. (Combustion test) Conforms to UL-94. Test piece: 1/16 "x 1/2" x
5 ″ (Izod impact strength) ASTM D256 1/4 ″, 23 ° C., notched (molding workability) Visually evaluated by the following standard during injection molding. ◯: No burr or sink mark is observed on the molded product. B: Some burrs or sink marks are observed on the molded product. X: There are many burrs or sink marks on the molded product. (Thermal stability at the time of molding) The change in color tone before and after the sample was allowed to stay in the injection molding machine at 240 ° C. for 30 minutes was evaluated according to the following criteria. E ₁ (color tone): Color tone of the molded product when continuously molded at 240 ° C. using an injection molding machine E ₂ (color tone): Molded product when retained molding at 240 ° C. for 30 minutes using the injection molding machine Color tone ΔE (change in color tone) = E ₂ −E ₁

[0060]

[Table 5]

[Table 6]

[Table 7]

[Table 8]

As is clear from the results shown in Tables 5-8,
The compositions of Examples 1 to 12 have excellent flame retardancy, and also have excellent impact resistance, molding processability (flowability), and thermal stability during molding. Furthermore, these compositions do not cause bleed-out and have excellent self-extinguishing properties. Moreover, no harmful gas is generated in the combustion test.

On the other hand, in the composition of Comparative Example 1, the amount of rubber in the rubber-reinforced resin (A-1) exceeds the range of the present invention, and the flame retardancy and molding processability are poor. In the composition of Comparative Example 2, the amount of tribromostyrene in bromostyrene, which is the component (b-1) in the rubber-reinforced resin (A-1), exceeds the range of the invention of Claim 3, and the rubber-reinforced resin is reinforced. Resin (A-
The amount of the component (b-2) in 1) exceeds the range of the invention of claim 1 and the moldability is poor. In the composition of Comparative Example 3, the content of the component (b-2) in the component (A) is less than the range of the present invention, and the moldability and impact resistance are poor. The composition of Comparative Example 4 contained (b) in the copolymer (A-2).
-2) The amount of acrylonitrile as the component exceeds the range of the present invention, and the moldability and the heat stability during molding are poor. The composition of Comparative Example 5 was the same as (b) in the copolymer (A-3).
-2) The amount of acrylonitrile as the component exceeds the range of the present invention, and the moldability and the heat stability during molding are poor. The composition of Comparative Example 6 has a gel content in the rubber-like polymer (a) in the rubber-reinforced resin (A-1) less than the range of the invention of claim 2, and has flame retardancy and impact resistance. Inferior In the composition of Comparative Example 7, the vinyl bond content in the rubber-like polymer (a) in the rubber-reinforced resin (A-1) is beyond the scope of the invention of claim 2, and the flame retardancy and moldability are improved. And the thermal stability during molding is poor. The compositions of Comparative Examples 8 and 9 have a content of the component (C) outside the range of the present invention, and are inferior in moldability and impact resistance.

[0063]

The flame-retardant resin composition of the present invention comprises a halogen-containing vinyl monomer such as bromostyrene (b-1).
Is a composition in which bleed-out of the flame retardant is prevented and the flame retardancy is improved by copolymerizing the above in a resin. Moreover, the composition of the present invention has good moldability (fluidity) and impact resistance, and is excellent in self-extinguishing property, and can be burnt,
It does not generate harmful gases such as dioxins and furans during incineration, and does not pollute the environment. Therefore, the composition of the present invention is
It is capable of molding large molded products such as equipment, office equipment, and electrical equipment and complex molded products, is a material that is practically excellent, has an extremely large industrial value, and is extremely useful in industry. In particular,
The flame-retardant resin composition of the present invention can be effectively used for molded articles that require heat resistance.

Continuation of the front page (51) Int.Cl. ⁵ Identification code Reference number in the office FI Technical display location C08L 35/00 LHS 7921-4J LJW 7921-4J 51/04 LKY 7308-4J 55/02 LME 7308-4J (72 ) Inventor Katsuo Omura 2-11-24 Tsukiji, Chuo-ku, Tokyo Within Nippon Synthetic Rubber Co., Ltd.

Claims (4)

[Claims] 1. To 100 parts by weight of the following component (A),
A flame-retardant resin composition comprising 0 to 30 parts by weight of the following component (B). Component (A): from 0 to 100% by weight of the following rubber-reinforced resin (A-1), 0 to 100% by weight of the following copolymer (A-2) and 0 to 70% by weight of the following copolymer (A-3). Becomes (A
-1), the total amount of (A-2) and (A-3) components is 1
The content of the halogen-containing vinyl monomer (b-1) copolymerized in the component (A) is 1 to 40.
The content of the vinyl cyanide monomer (b-2) copolymerized in the component (A) is 30 to 50% by weight.
% Copolymer composition, component (A-1): halogen-containing vinyl monomer (b-1) 0 to 4 in the presence of rubber polymer (a) 5 to 70 parts by weight.
0% by weight, vinyl cyanide monomer (b-2) 0 to 60% by weight, and selected from the group consisting of aromatic vinyl monomers, acrylic acid esters, unsaturated acid anhydrides and maleimide-based monomers. At least one monomer (b-3) 10
Monomer mixture (b) consisting of 0 to 0% by weight ((b) =
(B-1) + (b-2) + (b-3)) 95 to 30 parts by weight ((a) + (b) = 100 parts by weight) of a rubber-reinforced resin obtained by polymerization, (A-2 ) Component: halogen-containing vinyl monomer 10 to 50
Weight% (b-1), vinyl cyanide monomer (b-2) 0
To 60 parts by weight, and at least one monomer selected from the group consisting of aromatic vinyl monomers, acrylic acid esters, unsaturated acid anhydrides and maleimide-based monomers (b-
3) A copolymer obtained by polymerizing a monomer mixture consisting of 90 to 0 parts by weight, (A-3) component: 40 to 100% by weight of an aromatic vinyl monomer, and a vinyl cyanide monomer ( b-2), copolymerizing a monomer mixture consisting of 60 to 0% by weight of at least one monomer selected from the group consisting of acrylic acid ester, unsaturated acid anhydride and maleimide-based monomer. Obtained copolymer, component (B): flame retardant aid 2. The following component (A), relative to 100 parts by weight,
A flame-retardant resin composition comprising 0 to 30 parts by weight of the following component (B). Component (A): from 5 to 100% by weight of the following rubber-reinforced resin (A-1), 0 to 95% by weight of the following copolymer (A-2) and 0 to 70% by weight of the following copolymer (A-3). , (A-
1), the total amount of (A-2) and (A-3) components is 10
0% by weight, the content of the halogen-containing vinyl monomer (b-1) copolymerized in the component (A) is 1 to 40% by weight, and it is copolymerized in the component (A). Content of vinyl cyanide monomer (b-2) is 0 to 50% by weight
A copolymer composition which is, (A-1) component: the following (A-1-) component, the following (A-)
1-) component and at least one rubber-reinforced resin selected from the following (A-1-) component: (A-1-) component: a rubber-like polymer (a having a gel content of 2 to 30% by weight). ) In the presence of 5 to 70 parts by weight, 0 to 40% by weight of the halogen-containing vinyl monomer (b-1), 0 to 60% by weight of the cyanide vinyl monomer (b-2), and the aromatic vinyl monomer. Monomer mixture (b-3) consisting of 100 to 0% by weight of at least one monomer (b-3) selected from the group consisting of monomers, acrylic acid esters, unsaturated acid anhydrides and maleimide-based monomers. ) ((B) = (b-1) + (b-
2) + (b-3)) 95 to 30 parts by weight ((a) + (b)
= 100 parts by weight), a rubber-reinforced resin obtained by polymerizing (A-1-) component: in the presence of 5 to 70 parts by weight of a diene polymer (a) having a vinyl bond content of 10 to 70% by weight. In addition, 0 to 40% by weight of halogen-containing vinyl monomer (b-1), 0 to 60% by weight of vinyl cyanide monomer (b-2), aromatic vinyl monomer, acrylic ester, and unsaturated At least one monomer (b-3) 10 selected from the group consisting of acid anhydrides and maleimide-based monomers
Monomer mixture (b) consisting of 0 to 0% by weight ((b) =
(B-1) + (b-2) + (b-3)) 95 to 30 parts by weight ((a) + (b) = 100 parts by weight) of a rubber-reinforced resin obtained by polymerization, (A-1 -) Component: halogen-containing vinyl monomer (b-1) 0 in the presence of 5 to 70 parts by weight of the rubber-like polymer (a).
-40% by weight, vinyl cyanide monomer (b-2) 0-6
0% by weight, and at least one monomer (b-3) 1 selected from the group consisting of aromatic vinyl monomers, acrylic acid esters, unsaturated acid anhydrides and maleimide-based monomers.
Monomer mixture (b) ((b) =
(B-1) + (b-2) + (b-3)) obtained by polymerizing 95 to 30 parts by weight ((a) + (b) = 100 parts by weight) and having a graft ratio of 5 to 30. % Of rubber-reinforced resin, component (A-2): halogen-containing vinyl monomer 10-50
Parts by weight (b-1), vinyl cyanide monomer (b-2) 0
To 60 parts by weight, and at least one monomer selected from the group consisting of aromatic vinyl monomers, acrylic acid esters, unsaturated acid anhydrides and maleimide-based monomers (b-
3) A copolymer obtained by polymerizing a monomer mixture consisting of 90 to 0 parts by weight, (A-3) component: 40 to 100 parts by weight of an aromatic vinyl monomer, and a vinyl cyanide monomer ( b-2), copolymerizing a monomer mixture consisting of 60 to 0 parts by weight of at least one monomer selected from the group consisting of acrylic acid ester, unsaturated acid anhydride and maleimide-based monomer. Obtained copolymer, component (B): flame retardant aid 3. The flame-retardant resin composition according to claim (1) or (2), wherein (A-1) and (A-
2) 0 to 15% by weight of monobromostyrene, 80 to 100% by weight of dibromostyrene, and 0 to 1% of tribromostyrene as the halogen-containing vinyl monomer (b-1) in the component.
Flame retardancy characterized by using 0% by weight of bromostyrene and adjusting the content of the vinyl cyanide monomer (b-2) copolymerized in the component (A) to 0 to 50% by weight. Resin composition. 4. The flame-retardant resin composition 1 according to claim 1.
An iron-containing compound as the component (C), relative to 00 parts by weight,
A flame-retardant resin composition comprising 0.005 to 30 parts by weight of at least one compound selected from the group consisting of a silicon-containing compound and a hydroxyl group-containing compound.