JPH03263452A - Resin composition for shielding electromagnetic wave - Google Patents

Abstract

PURPOSE:To obtain an electromagnetic wave-shielding resin composition having excellent impact resistance, moldability and heat-resistance by compounding a specific amount of an electrically conductive filler to a thermoplastic resin composed of a specific rubber-reinforced resin, a polymer of an aromatic vinyl compound, etc. CONSTITUTION:The objective composition is produced by compounding (I) 100 pts.wt. of a thermoplastic resin composed of (A) 10-99wt.% of a rubber- reinforced resin produced by polymerizing (A1) 30-95 pts.wt. of a monomer mixture composed of an aromatic vinyl compound and other monomers in the presence of (A2) 5-70 pts.wt. of a rubbery polymer, (B) 0-70wt.% of a polymer produced by polymerizing (B1) 10-100wt.% of an aromatic vinyl compound and (B2) 0-90wt.% of other monomers and (C) 1-90wt.% of a polycarbonate with (II) 1-20 pts.wt. of an electrically conductive filler and, for imparting flame- retardancy, 1-20 pts.wt. of a flame-retardant and 1-10 pts.wt. of an antimony compound.

Description

Detailed Description of the Invention [Field of Application of Industry I-7 1 The present invention is applicable to impact resistance, molding process]', hardness, heat resistance 1. The present invention relates to an excellent electromagnetic wave shielding resin composition, and a flame retardant electromagnetic wave shielding resin composition having excellent impact resistance, moldability, heat resistance, and flame retardancy.

``Conventional technology'' In recent years, the housing field for electronic equipment, (') A office equipment, home appliances, etc. has been increasingly made of synthetic resin.

ing. However, because synthetic resins transmit electromagnetic waves emitted from electronic devices, electromagnetic interference such as noise and malfunction of elements can occur.

A method for preventing this electromagnetic interference [2] is to form a resin composition with conductivity by blending conductive fibers etc. into the old resin, and to use this conductive resin composition. It is well known to make housings.

Solved by the present invention [Problems to be solved by the present invention] These conductive resin 1111 products are used for humanoid molded products or multi-shaped molded products. , 'shi, ζ is often used, and its j, me (Ui 1st)
, 7 molded products and 1 item! It is necessary to have LL, impact resistance, and heat resistance of 4. .

Therefore, in order to obtain a resin composition for electromagnetic shielding with excellent impact resistance, a resin composition is known in which a conductive filler and the like are blended with a reinforced thermoplastic resin. However, since the conductive filler is a metal powder or fiber, it is not possible to obtain a material that has good moldability and MiJ impact resistance.

The present invention improves the disadvantages of poor moldability and impact resistance in a composition consisting of a rubber reinforced resin and a conductive filler, and provides an excellent balance of physical properties between moldability and impact resistance. (6) Excellent heat resistance.

Electromagnetic wave shielding resin composition and 1. ', and further aims to provide a flame-retardant electromagnetic wave shielding resin composition having flame retardant properties.

[Means for Solving the Problems] That is, the present invention includes (1) the following (A)/(B)/(C) -10 to 9
Thermoplastic resin consisting of 910-70/1-90% by weight (
I), ], 1 part by weight of conductive filler (II)
A resin composition for shielding electromagnetic waves, characterized in that it contains 20 parts by weight.

(A) rubbery polymer (a) in the presence of 5 to 70 parts by weight,
Aromatic vinyl compound/other monomer-・10-100
Monomer compound (b) 30-9 consisting of 10-90% by weight
5 parts by weight (a + b = 1.0 parts by weight) were polymerized 1. rResulting rubber reinforced resin.

(B) Aromatic vinyl compound/other monomer = 10-1
A polymer obtained by polymerizing 10 to 90% by weight of OO.

(C) Polycarbonate (2) (I) according to claim (1) / (II) according to claim (]) / Flame retardant / Andimon compound-100/1-2
A flame-retardant electromagnetic wave shielding resin composition characterized by containing 0/] to 20/1 to 10 parts by weight.

(3) (A)/(B)/(C) in F: 10-99
10 to 70/1 to 90% by weight, and the content of halogenated styrene in (A) and/or (B) is 5 to 70/1 to 90% by weight.
50% by weight of thermoplastic resin (]II)],, O0
1 to 20 parts by weight of conductive filler (II), 0 to 20 parts by weight of flame retardant, and O to 20 parts by weight of antimony compound, based on parts by weight.
A flame-retardant electromagnetic wave shielding resin composition containing 10 parts by weight.

(A) Rubbery polymer (a) Presence of 5 to 70 parts by weight, halogenated styrene and/or aromatic vinyl compound/other monomer other than halogenated styrene -10 to 10
Monomer compound (b) consisting of 010 to 90% by weight 30 to
A rubber-reinforced resin obtained by polymerizing 95 parts by weight (a = 100 parts by weight).

(B) Halogenated styrene and/or aromatic vinyl compound other than halogenated styrene/other monomer = 1
A polymer obtained by polymerizing 0 to 100 to 90% by weight.

(C) Polycarbonate It provides:

The present invention will be explained in detail below.

(1) Rubber-reinforced resin as component (A) in claims (1), (2), and (3) The rubber-reinforced resin as component (A) in claims (1) and (2) is:
In the presence of 5 to 70 parts by weight of rubbery polymer (a), aromatic vinyl compound/other monomer = 10 to 10010 to 9
It is obtained by containing 30 to 95 parts by weight (a+b=100 parts by weight) of monomer compound (b) consisting of 0% by weight.

The rubber-reinforced resin as component (A) of claim (3) contains halogenated styrene and/or an aromatic vinyl compound other than halogenated styrene/other in the presence of 5 to 70 parts by weight of the rubbery polymer (a). Monomer = 10-10010-90
30 to 95 parts by weight of monomeric compound (b) consisting of % by weight (
a+b=100 parts by weight). Note that the amount of the halogenated styrene used is for component (A) and/or
Alternatively, the content of halogenated styrene in component (B) described below is selected to be 5 to 50% by weight.

Examples of the rubbery polymer (a) mentioned above include diene rubbers such as polybutadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, hydrogenated products of the diene rubbers, EPMSEPDM, and ethylene-butene rubbers. Olefin rubber such as copolymer, acrylic rubber, aromatic vinyl (preferably styrene)-conjugated diene (preferably butadiene) block copolymer (preferably conjugated diene content is 50 to 90% by weight), the block copolymer Examples include hydrogenated products of polymers.

Examples of aromatic vinyl compounds include styrene, non-halogenated styrene such as α-methylstyrene, methylstyrene, p-methylstyrene, monochlorostyrene, dichlorostyrene, monobromostyrene, dipromostyrene, fluorostyrene, etc. Examples include halogenated styrene.

The aromatic vinyl compound according to claims (1), (2), and (3) is preferably styrene or α-methylstyrene.

The halogenated styrene according to claim (3) is preferably bromostyrene or dipromostyrene.

Examples of the other monomers mentioned above include methyl acrylate, ethyl acrylate, propylene acrylate,
Acrylic acid alkyl esters such as butyl acrylate, amyl acrylate, hexyl acrylate, octyl acrylate, 2-ethylhexyl acrylate, cyclohexyl acrylate, dodecyl acrylate, octadecyl acrylate, phenyl acrylate, benzyl acrylate: methyl methacrylate, ethyl methacrylate, propylene methacrylate , methacrylic acid alkyl esters such as butyl methacrylate, amyl methacrylate, hexyl methacrylate, octyl methacrylate, 2-ethylhexyl methacrylate, cyclohexyl methacrylate, dodecyl methacrylate, octadecyl methacrylate, phenyl methacrylate, benzyl methacrylate, cyanogens such as acrylonitrile, methacrylate trile, etc. unsaturated acid anhydrides such as maleic anhydride, itaconic anhydride, citraconic anhydride, unsaturated acids such as acrylic acid and methacrylic acid, maleimide, N-methylmaleimide, N-butylmaleimide, N-(p -methylphenyl)maleimide, N-
Examples include imide compounds of α- or β-unsaturated dicarboxylic acids such as phenylmaleimide and N-cyclohexylmaleimide. Used alone or in combination of two or more.

The composition ratio of the aromatic vinyl compound (in claim (3), halogenated styrene and/or aromatic vinyl compound other than halogenated styrene)/other monomer of the monomer compound (b) is 10 ~10010~90% by weight,
Preferably it is 40-10010-60% by weight. If the amount of the aromatic vinyl compound is less than 10% by weight, the molding processability will be poor, which is not preferable.

Preferred monomer compounds (b) are listed below.

Note that the expression "halogenated styrene and/or aromatic vinyl compound other than halogenated styrene" in claim (3) is hereinafter simply expressed as "r(H-8T) aromatic vinyl compound".

The preferred monomer compound (L) of claims (1) and (2)
))■ Aromatic vinyl compound/vinyl cyanide compound-・40~9515~・60@% by weight ■Aromatic vinyl compound/(meth)alkyl acrylate 1 l/vinyl cyanide compound-10 ~90/10~
9010 to 60% by weight 0 Preferably according to claim (3) 1. Immediately, mer compound (b) ■ (H-8T) Aromatic vinyl compound/vinyl cyanide compound -40-9515-60% by weight ■ (H-8T) Aromatic vinyl compound/argyl (meth)acrylate Ester/vinyl cyanide-10~・90
/10-9010-60% by weight By using halogenated styrene in claim (3), flame retardancy can be reduced to (·t-Lj).

The rubber-reinforced resin as component (A) of claims (1), (2), and (3) contains 5 to 70 parts by weight of a rubbery polymer (a), preferably 2 parts by weight.
Preferably, 10 to 70 parts by weight of immediate mer compound (b) 3 are present in F.
It is obtained by polymerizing 0 to 95 parts by weight, preferably 30 to 90 parts by weight. If (a) is less than 5 parts by weight, 1-
4.If the cuff exceeds the 0th point, the moldability is poor. The ratio is preferably 2 or 5 to 1.
50% market weight, more preferable (2 or 10-120% market weight)
Within this range, even better impact resistance, surface appearance of the molded product, and chemical resistance can be obtained.

Methods for producing component (A) and [2] include emulsion polymerization, suspension polymerization, solution polymerization, bulk polymerization, and polymerization methods that combine these polymerization methods.

(2) Description of the polymer of component (B) in claims (1), (2), and (3) Component (B) in claims (1) and (2) is an aromatic vinyl compound/ It is a polymer consisting of monomers -10.~10c110 to 90% by weight, preferably 40 to 100 to 10 to 60% by weight.

Component (B) of claim ('3) is (H-8,T) aromatic 1]2 vinyl compound/other monomer-10-10010-9
0% by weight, preferably 40-10010-60% by weight
It is.

-1- aromatic vinyl compound and (H-ST)
If the aromatic vinyl compound content is less than 10% by weight, the moldability is poor.

The amount of halogenated styrene used in the aromatic vinyl compound (H-8T) of claim (3) is such that the halogen content in component (A) and/or component (B) is 5 to 50% by weight. Choose as you wish.

The above-mentioned aromatic beer compound, halogenated styrene and other intermediates are the same as those shown for the above-mentioned bovine polymer compound (b). The aromatic vinyl compound is preferably styrene, α-medylstyrene, the halogenated styrene is preferably styrene, < is buDmos'f-lnon, particularly preferably dibromostyrene, and the other monomer is acrylonitrile. , methyl methacrylate and the like.

0 Preferable components (B) in claims (1) and (2) 2, 1
11-mer component 2 ■ Aromatic vinyl compound/vinyl cyanide compound-40
~9515~・60 reprint 1% ■ Aromatic vinyl compound/(meth)acrylic acid alkyl ester/vinyl cyanide compound-1-0~・90/1
0 to 9010 to 60% by weight O Preferred monomer component of component (B) in claim (3) ■ (H-8T) Aromatic vinyl compound/vinyl cyanide compound -40 to 9515 to 6
0% market weight ■ (H-8T) Aromatic vinyl compound/(meth)alcoholic acid salt/vinyl cyanide; -Ru 10-90
/1.0~・9010~60% by weight When the monomer used in component (B) is a 11-mer of the same type as the monomer compound (b) of component (A), the result is - much better. The Lj objective of the present invention is obtained.

(3) Explanation of polycarbonate as component (C) in claims (1), (2), and (3) Polycarbonate as component (C) 1. In this case, aromatic polycarbonate, aliphatic polycarbonate, aliphatic −
Examples include aromatic polycarbonate. In general, 2,2-bis(4-oxyphenyl)alkanes, bis(4-oxyphenyl)ethers, bis(4-oxyphenyl)
-oxyphenyl) sulfone A polymer or copolymer made of bisphenols such as sulfide or sulfoxide, and is a polymer using bisphenols substituted with halogen depending on the purpose. Types of polycarbonate, manufacturing methods, etc. are described in detail in "Polycarbonate Resin" published by Nikkan Kogyo Shimbun (September 30, 1962).

(4) The conductive filler of claims (1), (2), and (3) (
Explanation of II) The conductive filler may be in the form of fibers, flakes, powders, etc., but the filler is preferably in the form of fibers.

Fibrous fibers include stainless steel fiber, aluminum fiber, copper fiber, common steel fiber, brass fiber, metal-coated glass fiber or carbon fiber, nickel fiber,
There are silicon fibers, tin bronze fibers, Fernico fibers, permalloy fibers, carbon fibers, etc. Among these fibers, stainless steel fibers are preferred.

Aluminum flakes are available as flakes.

Examples of the powder include aluminum (alloy) powder, conductive carbon black, nickel powder, tin powder, zinc powder, graphite, copper powder, and ferrite powder.

The fiber, flake, and powder conductive fillers mentioned in ``2.
Surface treatment, surface coating, and fiber convergence with various silane coupling agents, various polymers, etc. may be used.

(5) Description of the flame retardant in claims (2) and (3) As the flame retardant, flame retardants used in polymers such as -acid rubbers and resins can be used.

Examples of flame retardants include halogen compounds, phosphorus-containing compounds, nitrogen-containing compounds, silicon-containing compounds, and the like. Examples of these flame retardants are listed below.

5 Tetrabromobisphenol A or tetrabromobisphenol A derivatives such as tetrabromobisphenol A-bis(2-hydroxyethyl ether), tetrabromobisphenol A-bis(2,3-dibromopropyl ether), hexabromodiphenyl ether, octabromodiphenyl ether , decabromodiphenyl ether, bis(tribromophenoxy)ethane, hexabromocyclododecane, etc. can be used.

Furthermore, for example, monobromophenol, tribromophenol, pentabromophenol, tribromocresol, dibromopropylphenol, tetrabromobisphenol S1 cyanuric chloride, etc. can be polymerized, or these and one or more selected from the group of the above halogen compounds can be added. Oligomeric halogen compounds obtained by copolymerization with halogen compounds can be used.

Further, there are polycarbonate oligomers of tetrabromobisphenol A, polycarbonate 6 oligomers of tetrabromobisphenol A and bisphenol A, polycarbonate oligomers of tetrabromobisphenol S, and polycarbonate oligomers of tetrabromobisphenol S and bisphenol S.

H6 [wherein n is an average degree of polymerization of 1 to 100, X independently represents hydrogen, chlorine or bromine, i, j, k and ρ are each an integer of 1 to 4, R and R' are each independently hydrogen, methyl group, and epo (where m is 0.1.2
or 3). ] halogenation, ]′, boxy 4′ oligomer, etc. can be used.

In 17, one or more flame retardant aids such as iron oxide, sand, barium metaborate, and nium oxide may be used.

(6) Description of antimony compounds in claims (2) and (3) Antimony compounds and I include, for example, antimony oxide, antimony tetroxide, antimony pentoxide, andium oxide, and antimony phosphate. etc. are mentioned,
Preferably, it is 7-antimony dioxide or sthorium antimonate.

Next, the (flame-retardant) electromagnetic wave shielding resin composition of claims (1), (2), and (3) will be explained.

(1) The electromagnetic wave shielding resin composition claimed in claim (1) (
The electromagnetic wave shielding resin composition of 1) has the above-mentioned (A)/(
B)/(C)=10-9910-70/1-90% by weight, preferably 20-=8O10-.5 O/5-.
80% by weight, more preferably 25-75/1-45
/ Thermoplastic resin (I) consisting of 1 O to 60% by weight
j5 per 100 parts by weight, the above-mentioned conductive filler 1 to 2 (]
Parts by weight, preferably 1. < is 1. A composition containing 10 medium parts (...).

(A) Component (10% by weight) has sufficient impact resistance.
When moldability is obtained and λ exceeds 4゛, -·b', 99 weight Ju%, the component (C) becomes less than the range, and the following reasons (preferable than J: 1.<no).

If component (B) exceeds 7% by weight, the impact resistance and heat resistance will be low.

(C) component is impact resistance due to conductive filler, molding process]
- It is said that it suppresses the low F of the case and, as a result, improves the physical property balance between impact resistance and moldability. ,
If the amount is less than 1% by weight, the balance of physical properties between impact resistance and moldability deteriorates (I71), and heat resistance also decreases. On the other hand, if it exceeds 90% by weight, chemical resistance and moldability will be poor.

If the amount of conductive filler used is less than 1 part by weight, sufficient electromagnetic wave shielding properties cannot be obtained, and if it exceeds 20 parts by weight, impact resistance and moldability are poor.

(2) Flame-retardant electromagnetic wave shielding resin composition according to claim (2) The flame-retardant electromagnetic wave shielding resin composition according to claim (2) has the above-mentioned (A)/(B)/(C)=10 ~・9910~70
/1-90% by market weight, preferably 7-8010-50
/ 5 to 8 [-house■ (amount%, more preferably 25 to
75/1 to 45/10 to 60 wt. 1 (parts by weight, the above-mentioned flame retardant -1...-20 parts by weight, preferably: 1, or 1 to 15 parts by weight, the above-mentioned antimony compound 1--20 parts by weight)
10 parts by weight, preferably 1 to 8 parts by weight.

-1, (A), (B) 7, ((]) and the reason for limiting the numerical value of the valley component of the conductive filler are the same ζ° as in the above-mentioned claim (1).

If the amount of the flame retardant is less than 1 part by weight, the flame retardance will not be as good as 1 part by weight, and if it exceeds 2 parts by weight, the moldability and impact resistance will deteriorate, so it is preferable. Better 5 Not 3, Ann y-
If the amount of the compound is less than 1 part by mass, excellent flame retardancy can be obtained.
and impact resistance ('t), moldability is low -1.

(3) Flame-retardant electromagnetic wave shielding resin composition according to claim (3) The flame-retardant electromagnetic wave shielding resin composition according to claim (3) has the above-mentioned (A)/(B)/(C)=10 ~・9910~70
//]--90% by weight, preferably 20-8010
~50/5 □~・8 []% by weight, more preferably 7
25~, 75/1~, 45/10~60% by width, and 5~50% of halogenated sulphate in one component (A) and/or (C). Amount %, preferably 1.
< is 5 to 40% by weight per 100 parts by weight of thermoplastic resin (1, conductive filler 3.-2ONtff 1 part, preferably,... < ii 1 to 10 parts by weight, the above flame retardant o -20 parts by weight, preferably 0 to 1.5 parts by weight,
More preferably, < is 1 to 15 parts by weight, and the antimony compound is 0 to 0 small parts (, or 0 to 8i1? #i' parts, and (J-preferably, < ii 1-8Φ ]This is the quantity part.

The reasons for limiting the numerical values of each component of (A), CB), and (C) conductive filler in (1)-1 are the same as those in claim (1) above.

l\styrene 1 in (A) and/'' or (H)
．．・One meter of Japanese irises contains less than 5% by weight. On the other hand, if it exceeds 50% by weight, moldability and impact resistance will be poor.

The reason for limiting the upper limit of the flame retardant and antimony compound in item 2 is the same as that in claim (2) above.

The content of the rubbery polymer (a) in the (flame-retardant) electromagnetic wave shielding resin composition of claims (1), (2), and (3) of the present invention is preferably 5 to 40% by weight, More preferably 5~
It is 30% by weight.

There are no particular limitations on the method for producing the electromagnetic wave shielding resin composition and the flame-retardant electromagnetic wave shielding resin composition of the present invention, and conventional known methods can be employed. For example, all the components of the composition are mixed in a mixer and used as a molding material, or a mixture in which components other than the conductive filler component are mixed in advance, or a conductive filler is added to pelletized mixture. There is a method of using the added material as a molding material.

Furthermore, pigments, dyes, heat stabilizers, antioxidants, ultraviolet absorbers, light stabilizers, lubricants, plasticizers, antistatic agents, flame retardants, and the like may be added depending on the purpose.

[Examples] In order to explain the present invention more specifically, examples and comparative examples will be given below. The resin composition finally obtained was molded by injection molding, and then various physical properties were measured using the following test methods.

As an evaluation of impact resistance, 1/2' Izot impact strength was measured according to ASTM D-256.

As an evaluation of molding processability, the melt flow rate was measured according to JIS
Evaluation was made according to K-7210.

As an evaluation of electromagnetic shielding properties, volume resistivity was measured using a digital multimeter TR6824 (manufactured by Atopan Test Co., Ltd.).

The surface appearance of the molded product was evaluated by visually observing the surface of the test piece.

◎: Uniform gloss and smooth surface.

○: Glossy and somewhat smooth.

×: There is uneven gloss, and it is applied smoothly.

Flame retardancy evaluation is based on UL-94 (test piece thickness 1/16
').

3 4 0 Description of each compounding component used in Table-1 A component A-1 = Rubber reinforced resin consisting of 20% polybutadiene, 60% styrene, and 20% acrylonitrile. Graft rate: 45%.

A-2=Rubber reinforced resin consisting of 60% polybutadiene, 30% styrene, and 10% acrylonide. Graft rate: 35%.

A-3: 20% polybutadiene, 20% dipromostyrene
%, 40% styrene, and 20% acrylonitrile. Graft rate: 40%.

Component B-1 = copolymer consisting of 70% styrene and 30% acrylonitrile.

B-2: Copolymer consisting of 5% styrene, 70% α-methylstyrene, and 25% acrylonitrile.

B-3 = Copolymer consisting of 50% styrene, 30% dipromostyrene, and 20% acrylonitrile.

C component C-1: Polycarbonate (Taflon A2200, manufactured by Idemitsu Petrochemical ■) Conductive filler D-1 stainless steel fiber (Bexield, manufactured by Bekaert) D-2 stainless steel fiber (Naslon, manufactured by Nippon Seiren ■) Flame retardant E-1 Nibrominated epoxy oligomer (EC-20, manufactured by Dainippon Ink ■) E-2: Decabromodiphenyl ether E-3: Tetrabromobisphenol A oligomer Examples 1 to 9, Comparative Examples 1 to 4 Table-1 Components other than the conductive filler were mixed in advance using a Henschel mixer, and pellets were produced using an extruder at a temperature of 240°C. Next, the pellets and a conductive filler are mixed, and this mixture is used in various test No. 1 injection molding machines.
3, Examples 1 to 1) are electromagnetic wave shielding compositions within the scope of the present invention (flame retardant) 1), and the []
The targeted effect was achieved by the Song Dynasty.

In Comparative Example 1, the C component was less than the range of the present invention, and the physical property balance of moldability and impact resistance was poor.

Comparative Example 2 is an example in which the conductive filler is less than the range of the present invention, and the electromagnetic wave shielding property is poor.

Comparative Example 3 is an example in which the conductive filler exceeds the scope of the present invention, and the molding processability, impact resistance, and appearance of the molded product are poor.

Comparative Example 4 is an example in which the flame retardant exceeds the scope of the present invention,
Poor moldability and impact resistance.

Margin below 7 "Effects of the Invention" Conventionally, when a conductive filler is added to a 7 rubber reinforced resin that has excellent impact resistance and moldability L1-1, the impact resistance and moldability are significantly reduced. Although it has not been possible to obtain an electromagnetic wave shielding resin composition with excellent impact resistance and moldability, the present invention has improved impact resistance by adding a conductive filler to a rubber reinforced resin and further adding polycarbonate. There was little deterioration, and as a result, there was a margin in impact resistance, so molding process 1-
It is also possible to use rubber-reinforced resins with better properties, so it is possible to create electromagnetic shielding resin compositions with an excellent balance of physical properties such as impact resistance and moldability, as well as excellent heat resistance, as well as even better flame retardancy. This is a flame-retardant electromagnetic wave shielding resin composition.

Claims (3)

[Claims] (1) The following (A)/(B)/(C) = 10-99/0
Thermoplastic resin (I) consisting of ~70/1 to 90% by weight
A resin composition for shielding electromagnetic waves, comprising 1 to 20 parts by weight of a conductive filler (II) per 100 parts by weight. (A) In the presence of 5 to 70 parts by weight of rubbery polymer (a), aromatic vinyl compound/other monomer = 10 to 100/0
A rubber reinforced resin obtained by polymerizing 30 to 95 parts by weight (a+b=100 parts by weight) of monomer compound (b) consisting of 90% by weight. (B) Aromatic vinyl compound/other monomer = 10-1
A polymer obtained by polymerizing 00/0 to 90% by weight. (C) Polycarbonate (2) (I) according to claim (1) / (II) according to claim (1) / flame retardant / antimony compound = 100/1-2
A flame-retardant electromagnetic wave shielding resin composition containing 0/1 to 20/1 to 10 parts by weight. (3) The following (A)/(B)/(C) = 10-99/0
~70/1~90% by weight, and (A) and/
Or the halogenated styrene content in (B) is 5 to 50
1 to 20 parts by weight of conductive filler (II) and 0 to 20 parts by weight of flame retardant per 100 parts by weight of thermoplastic resin (III) (% by weight)
1. A flame-retardant electromagnetic wave shielding resin composition comprising 0 to 10 parts by weight of an antimony compound. (A) In the presence of 5 to 70 parts by weight of rubbery polymer (a), halogenated styrene and/or aromatic vinyl compound other than halogenated styrene/other monomer = 10 to 10
Monomer compound (b) consisting of 0/0 to 90% by weight 30 to
A rubber reinforced resin obtained by polymerizing 95 parts by weight (a+b=100 parts by weight). (B) Halogenated styrene and/or aromatic vinyl compound other than halogenated styrene/other monomer = 1
A polymer obtained by polymerizing 0 to 100/0 to 90% by weight. (C) Polycarbonate