JPS5968359A - Flame-retardant resin composition - Google Patents

Abstract

PURPOSE:To provide the titled compsn. excellent in barrier properties against electromagnetic waves, by incorporating a chlorinated polyethylene, conductive carbon, Al(alloy) powder, a halogen-contg. org. compd., Sb2O3, and hydrous inorg. matter with vinyl chloride polymer in specific proportions. CONSTITUTION:A chlorinated polyethylene (B) with a chlorine content of 20- 50wt%, conductive carbon black (C), Al (alloy) powder (D), a halogen-contg. org. compd. (E) (e.g., chlorinated paraffin), antimony trioxide (F), and hydrous inorg. matter (G) (e.g., magnesium hydroxide) are incorporated with a vinyl chloride polymer (A) with a degree of polymn. 400-4,000, wherein B is 1-25vol%, C is 5-50vol%, D is 5-50vol%, and (C+D) is 10-60vol% based on (A+B+C+D), respectively; B is 40vol% or less based on (A+B); each of E and F is 5pts.wt. or more and G is 40pts.wt. based on 100pts.wt. (A+B), respectively.

Description

Detailed Description of the Invention (TI) Object of the Invention The present invention relates to a flame-retardant resin composition.More specifically, the present invention relates to a flame-retardant resin composition. If blank, Q.(r)) Powdered, fibrous, and flake-like materials of aluminum or aluminum-based alloys, (g) Halogen-containing organic compounds, not only are they excellent; The object of the present invention is to provide a flame-retardant resin composition that is 11 tons lighter than metal ones, has good electromagnetic wave shielding properties, and has good processability and moldability. It is.

[Background of the invention of IO The sources of electromagnetic radiation are increasing as industries become more sophisticated and household life becomes more stressful. Therefore, leakage of electromagnetic waves can cause dangerous harm to the human body and damage to ICs in electronic equipment.
This has resulted in negative effects such as malfunction, and has become a serious social problem. In particular, electromagnetic waves emitted from electronic r/81 calculators and various 1F office processing equipment may cause interference to televisions and audio equipment.
I'm getting excited.

In addition, in the field of automobiles, automatic control systems for starting the engine, controlling various devices;
Electronic devices are now being used for such purposes. Furthermore, a micro combi coater has been installed. In addition, electronic equipment such as telephones, radios, and televisions (i.e., via iFi) can be installed inside cars to improve livability. These various types? 1-chi devices are suffering from malfunctions due to electromagnetic waves emitted from the engine parts and even electromagnetic waves from outside.

For these reasons, various methods have been adopted in recent years to shield electromagnetic waves.

In general, metals have the property of absorbing or reflecting electromagnetic waves, so they are effectively used as electromagnetic wave shields for microwave ovens and various communication devices. We also use thermal spraying, vapor deposition, and painting of metal on plastic for the same purpose.
Plating etc. are also applied. Furthermore, materials obtained by mixing plastics with relatively large amounts of additives such as carbon powder and metal powder are also used.

However, the method of using metal as a 4.4 advantage or the method of applying treatment such as metal spraying to Plus Deck has a large specific gravity, poor workability, and the processing method is not easy and the processing cost is high. There are drawbacks in such areas.

Further, regarding the method of mixing additives, if the additive is added in a small amount of ff1U, its effect cannot be exhibited within 1 minute. On the other hand, if a large amount of 7-containing is used, the effect can be exhibited, but the resultant molded product will not have a high quality.
There is a drawback that the J llni degree is significantly low F.

Furthermore, for plastic molded products whose inner surfaces are coated with metal spraying or conductive coating for the purpose of shielding electromagnetic waves, the metal spray coating or conductive coating may peel off or become fragmented due to a falling ball from the outside. If such items fall, it may damage the internal electronic circuits or cause a fire. Further, in electronic equipment such as office equipment, the casing is required to have a certain degree of flammability from the viewpoint of fire safety. Thus, there is a need for a resin composition that does not cause peeling or destruction of the surface layer due to f%'F, is flame retardant, has excellent processability, and has electromagnetic wave shielding ability.

Width 1 Structure of the Invention From the above, the inventors of the present invention do not have to deal with these drawbacks, and have developed an electromagnetic wave.
Furthermore, as a result of various searches to obtain a synthetic resin composition with good flame retardance TL+, we found that (A) [degree of polymerization /100 to /1.0 (,10 hinyl chloride is combined with i: component and 4- combination f4((hereinafter l 'Kt
(B) Amorphous or crystalline salt content of 20~
50 tonne % of chlorinated polyethylene; (C) conductive carbon black; It is a composition consisting of a halogen-containing organic compound, 0.) antimony oxide, and (G) a water-containing inorganic substance, including vinyl chloride resin, chlorinated polyethylene, and aluminum. The blending ratio of the powder and conductive carbon black is 1 to 1% for chlorinated polyethylene, 5 to 50% for conductive carbon black (T14%), and the proportion of aluminum powder conductive carbon blank and aluminum powder have a total of 31% by volume.
As a punch, the proportion of chlorinated polyethylene in the total of vinyl chloride resin and chlorinated polyethylene is at most 40 volumes...1%, and the total amount of vinyl chloride resin and chlorinated polyethylene is #tFt1oo Printing Department The blending ratio of the halogen-containing organic compound and antimony oxide is at least 5% each, but the combined ratio of the halogen-containing organic compound and antimony oxide is at least 5%. l'l'
? 1: at most 50 parts by weight and 18 parts by weight, and the water-containing inorganic material is at most 40 parts by weight, but the ratio of the water-containing inorganic material to the conductive carbon blank of 1 part is at least 5 parts. (11 parts ψ Finding 5, we arrived at the present invention.

11\c Effects of the Invention 1)) The feature of the present invention is that aluminum is selected from among various metals. Aluminum has a low specific gravity compared to other metals, so it is not only easy to mix uniformly with vinyl chloride resin and polyethylene chloride, but it is also highly flexible, so it is difficult to mix during mixing and during molding and machining 13. It causes little damage to mixers and molds, and has excellent workability. Furthermore, unlike iron, it is not attacked by moisture in the air.

In other words, the flame-retardant resin composition obtained by the present invention has extremely excellent electromagnetic wave shielding performance.
<, has the following effects (features).

(+) It's light 11th grade.

(2) Good mechanical strength such as bending strength.

(3) It has excellent formability, so it can be formed into any shape.
：It's easy to do.

(4) Secondary addition costs required for electromagnetic wave shielding treatment (for example, metal spraying, conductive coating, plating, etc.) are reduced, resulting in a significant cost reduction.

(5) Since it has excellent thermal conductivity, when used in the housing song of electronic equipment, the internal heat dissipation efficiency is improved.

(6) Since the conductivity is fj, it is effective against equipment failure due to static electricity (has a static electricity shielding effect).

(7) Since it is flammable, it is possible to maintain safety even against abnormal currents in internal equipment.

The flame-retardant resin composition obtained by the present invention not only has extremely good electromagnetic wave shielding performance, but also has an effect superior to that of -1°, so that it can be used in many directions. Typical uses are shown below.

(1) Use of office equipment such as fax machines, printers, word processors, etc. (2) Consumer electronics such as televisions and videos, electronic equipment, electronic equipment, etc.
Housing machine internal parts for electrical/electrical/equipment such as calculators and communication equipment, (3) Various measuring equipment for automobiles (speed 81, etc.)
Housing materials for automobile side MIm such as engines, housing materials for microcomputers, telephones, televisions, radios, etc. installed in automobiles, as well as furnace tube covers for electrical wiring covers, edges.Details of the invention Explanation (5) Vinyl chloride resin The vinyl chloride resin used in the present invention has at most 5 (l i
The 117 degree of polymerization of this vinyl chloride resin, which is a copolymer with 1% (preferably 45% or less) of vinyl chloride and a compound having at least one double bond capable of co-merging, is 400-4 (100, 400-25
00 is better, cow: pni < OO ~ 1.500 is better.
It is within. We define this double bond as 4 f with at least one
Representative examples of such compounds include vinyl chloride, ethylene, propylene, vinyl acetate, acrylic acid, methacrylic acid and their esters, maleic acid and their esters, and acrylonitrile. These vinyl chloride polymers are obtained by polymerizing vinyl chloride or by polymerizing or copolymerizing vinyl chloride and the above-mentioned vinyl compound in the presence of a free radical catalyst, and the manufacturing method thereof is widely used. It is used in many ways.

(B) Chlorinated polyethylene The chlorinated polyethylene used in the present invention can be prepared by chlorinating polyethylene powder or particles in an aqueous suspension, or by chlorinating polyethylene dissolved in a solvent. (preferably those obtained by chlorination in aqueous suspension).Generally, its chlorine content [juice is 20-50% (% amorphous or crystalline)]. : is a chlorinated polyethylene of
'T't: f1'i% amorphous and crystalline chlorinated polyethylene is preferred.

11 The polyethylene can be produced by combining ethylene with IF or by combining ethylene with at most 10% of α-refin (generally has as many carbon atoms as 7 or 6). The density is generally 0.9
10 to 0.97 (1/i), and its molecular weight is 50,000 to 700,000.

The polyethylene used to produce ethylene is ethylene! It can be obtained by copolymerizing ethylene and propylene or ethylene and the above-mentioned α-olefin using a so-called Ziegler catalyst or a Phillips catalyst. Ziegler catalysts are transition metal compounds (for example, halogen-containing compounds of titanium) or i? M transition metal compound is supported on a carrier (e.g., a magnesium-containing compound, the so-called world life support obtained by treating the magnesium-containing compound with a 717. Phillips catalyst is obtained from chromium or molybdenum oxides, or these oxides and zirconium lamino (t).
A carrier 1 obtained by supporting a compound on a carrier (for example, silica, silica-alumina)! T5 from the supported catalyst or the pressed catalyst and the organometallic compound
It is something that can be done. Below-1, the catalyst is Deckler catalyst θ
Only typical μ and Flips catalysts are shown, and other known catalysts may also be applied. The method for producing this copolymer is also well known.

C) Carbon black The conductive carbon black used in the present invention generally has a specific surface area of 20 to 18 (lom'/g and pore volume) measured by low temperature nitrogen adsorption method and BET method. ([11] is 1.5 to 4.0 c measured by water tM injection method in the range of 30 to 7500% of the pore 1' diameter.
c/g, especially when the specific surface area is 600 to 1200 m'
/g is valid.

The carbon blacks include channel blacks, acetylene blanks, and nonovo/blanks produced by the furnace black process. Regarding these carbon blacks, please refer to “Carbon Blank Handbook” edited by Carbon Black Association (Tosho Publishing Co., Ltd., [1r (Japanese 4th Edition)
(Published in 1997), edited by Rubber Dinoest Co., Ltd. “Handbook, Rubber...
Plastic Compounded Chemicals'' (Rubber Digest, Published in 1974), 1) [J. ``Synthetic Rubber Handbook'', their manufacturing methods and physical properties are well known.

a) Powdered aluminum The powdered aluminum useful in the present invention is powdered, fibrous, and flaked aluminum or -j' aluminum alloy. For powdered materials, the average size is generally 250 mesh to 20 mesh. Also,
As a fibrous material, its diameter is generally (1,002
The length is 0 to 0.20 mm, and a length of 1 mm or more is desirable because it is a rainbow brown color.

Furthermore, as a flake-like material, the cross-sectional area is O, IXO,
It is possible to use any shape such as circular, square, rectangular, or rectangular with dimensions from 1 mm to 5 x 5 mm, and it is preferable that the thickness is less than 0.1 mm. , about I 'i'''1: is good. The flakes of aluminum Uno have good dispersibility in the door insertion resistance resin, and like fibrous materials, they become entangled with themselves to form beads. In addition, there is a strong tendency to mix the impact-resistant resin along the flow direction during molding, and the mixed resin not only has good conductivity but also has a good bending modulus.

In particular, flakes having a surface area comparable to that of ImmXI are most preferred from the viewpoint of dispersibility. These powders,
Fibrous or flake-like materials may be used in China or Germany, or two or more of them may be used in combination, which is preferable because the effect can be achieved with a small mixing ratio to achieve the purpose of the present invention. It is.

In addition, the content of aluminum Uno in the aluminum alloy (i
is J Chugu 80 city lit% or more.

The vinyl chloride resin described in 1- below. Electromagnetic wave shielding 16 (
・It's a composition that has very loose undertones and good mechanical strength.
t+? ] (It is good as long as the flame retardance and ox are satisfactory. L)) are mixed with the halokene-containing organic compound 1'J and or vinegar [and antimony]. The only thing that can be done is twisting or twisting.

(D Halorane-containing organic compound The halokane-containing organic compound used in the present invention is
It is widely known as a retardant.

Representative examples include tetrachlorophthalic anhydride, m-chlorinated paraffin, chlorinated bisphenol A1, brominated hisphenol S1, chlorinated diphenyl, odor-containing diphenyl, chlorinated naphthalene, tris(β-chloroethyl)phosphate-1, and tris( dibromobutyl) phosphate.

Furthermore, the antimony oxide used in the present invention is 1
) Any one of the halone-containing organic compounds described in II is used as a combustion aid in -fflL. Typical examples include antimony oxide, Nl antimony, and antimony oxide.

These halokene-containing organic compounds and antimony oxide are well known from 1) 'Handbook, Gono Plastic Compounded Chemicals'.

(G) Water-containing inorganic substance The water-containing inorganic substance used in the present invention has a bound water content of 10 to 80 i % J and a true specific gravity of 10 to 50. Typical examples of hydrated inorganic substances are hydrates of metals of Groups If A, Group II B, and Group 111B of the Periodic Table and salts containing these metals. Examples of the hydrated inorganic substances include magnesium hydroxide, calcium hydroxide, and aluminum hydroxide (ke20: + ・+111
20), Eiwa Seki) (, Kaholi/clay, Charcoal ρ1 Takarununo\, Hytrotalzite, Salt-Normal Carbonate Maksu,
Examples include compounds that have water in their molecules, such as barium, boric acid, and barium sulfate. The water-containing inorganic substances of kneading) are qilf with respect to water.
The solubility of Lice in water is generally less than 1()S at a humidity of 20"0; preferably less than 1y, especially i, t (1,
II or later is preferred. Suitable +? 71 (as an inorganic substance (,l,i(acid f[:aluminum・,zl(fi
l ri i'i, hydroxide makuneuuno 1, charcoal 1f, +
Cal, Uno 1, Salinophilic machinenium carbonate-1'L b'
Toi11j'Kr N27)/Ne/lノA1, U'KNj Magnesium, (MgO・Sin,) can be opened. Regarding these water-containing inorganic substances, Lahaku Ino Est? ``Handbook of Goto Plastic Compounded Chemicals'' (Rano-Taijiest Co., Ltd., published in 1949), pages 221 to 253, describe their manufacturing methods, physical properties, and product names. has been
It is well known.

()I) Blending ratio In the composition of the present invention, the proportion of blending 1 in the total (total + IL ratio) of vinyl chloride resin, chlorinated polyethylene, aluminum powder, and conductive carbon black
In case 111, the chlorinated polyethylene is 1 to 25% by volume, preferably 2 to 25% by volume [7;%, and 5=2 for Q' and r.
0 volume leaf % is suitable. The blending ratio of chlorinated polyethylene in the total of these 31 parts is 1 volume [1 (less than 1%).
In addition to the poor flammability of the resulting composition (11), it is difficult to obtain a uniform dispersion with the flame retarding agent described below, so it is difficult to achieve a uniform flame retardant effect. Exceeding this is not preferable because the stiffness, flexural modulus, and strength of the resulting composition will be low.

In addition, the proportion of chlorinated polyethylene in the 81 compounds (total) of vinyl chloride resin and chlorinated polyethylene is at most 40%, and 5 to 40%...0%.
is desirable, particularly 10 to 35% by volume.

If the blending ratio of chlorinated polyethylene 7- to the total width of these nails exceeds 4%, the stiffness, flexural modulus, and other strengths of the vinyl chloride resin will decrease, and when used as a housing. , it has the disadvantage of being "soft".

Furthermore, the inclusion of powdered aluminum in the composition according to the present invention (formulation Fil1)
is 5 to 5 (l volume fii%), and the r+rJ content of the conductive carbon black is 5 to 50 volume iff%.Furthermore, the sum of both of the elements contained in the composition is 10 to 50%.
60 volume...:%.

Part 8 of the present invention. The ㅅf point is that aluminum or aluminum alloy powder, fibers, or flakes and conductive carbon black are present in the composition, and the sum of the two is 10 to 6% by volume. It is a certain thing. In particular, the sum of these should be 20 to 50 vol.
A range of is suitable. In particular, in the low frequency region (MHz), conductive carbon black (effective conductive carbon black) and the high frequency region (KHz)
Electromagnetic wave shielding FA'? By mixing effective aluminum flakes, it not only shows a shielding effect over a wider frequency range, but also? 21J) It has been discovered that, even in areas where both drugs have little effect when used alone, by using both in combination, a significant blocking effect can be exerted. Although the reason for this excellent effect is not clear, it is presumed that the electromagnetic wave energy reflected or absorbed by the aluminum powder is grounded through the conductive carbon black. As a conclusion g4 that explains this reason, by using a conductive carphone blank in combination,
The electrical conductivity of the compositions of the present invention is significantly improved.1. It is to let

The sum of aluminum powder, etc. and conductive carbon black in the composition obtained by the present invention.
If it is less than 0 volume @ %, the shielding effect at low frequencies (certain) cannot be exhibited within 1 minute.

On the other hand, if it exceeds 60% by volume, the moldability of the composition decreases, which is not preferable.

Furthermore, the blending ratio of the vinyl chloride resin and chlorinated polyethylene (based on 100 parts), the rogen-containing organic compound, and the antimono oxide is at least 5 Qjti, respectively.Also, their division,
j', t is at most 5 (l iT'(!If part, the total [11 is 10 to 45 cities: 1: part or preferably, especially 15 to 451n!t: part or good'1&.+ (in halogen-containing organic compounds of 00 tons)
・rJ Konjomi F1. The combination of acid f and antimony is generally 10 () to 6 () (1 part of Leroli, preferably 11-1 parts of l fl C1 to 400 tons, and !r\ Flame retardant / l'l- and blue l) -
Point of compatibility h"+l 50~400 +'g!ii Part Cal lr suitable and al.

The 10 key points of the present invention are that, in addition to the usual flame retardant formulation consisting of (r @ ft compound and antimono oxide), it has good Jb properties;
In order to give high flammability (V-0 according to TJL-94 method), a combination of salt f vinyl anti-grease and chlorine f polyethylene was used.
It is possible to mix at most 50 fQ parts of the substance into f IJ, and in particular, to mix (add) 45 fQ parts or less.

In addition, at least 5 parts by weight, preferably 1-1 parts by weight or more, per 100 parts by weight of the conductive carbon black.
Preferably, a hydrous inorganic substance of c-t, 20 ii < is not obtained.

In producing the composition of the present invention, vinyl chloride thread resin, chlorine ratio polyethylene, conductive carbon blank, aluminum powder, 41 compounds containing haloken,
Antimony oxide and water content! Each of the No. 1 substances may be used alone, or two or more types may be used in combination.

(J) Manufacture of composition, manufacture of molded article In order to manufacture the composition of the present invention, two steps are required in the vinyl chloride resin industry.
Dry blending may be carried out using a commonly used Hennel mixer, or by melt kneading using a Banbury mixer, kneader, roll mill, and screw mixer. Obtainable. At this time, tri-blend in advance,
A homogeneous composition can be obtained by melt-kneading the resulting composition (mixture).In particular, it is better to use a vinyl chloride resin in the form of powder, or to mix it uniformly. desirable for In this case, the mixture is generally melt-kneaded, then molded into pellets, and subjected to the molding described later.

What to know about vinyl chloride resin when producing the composition of the present invention! Oxygen and heat stabilizers, metal deterioration preventive agents, plasticizers and fillers, which are commonly used in f.
'#4°], then a flame retardant may be further added.

In both cases of melting and molding, the softening temperature of the polyvinyl chloride thread resin must be 1tli L or less than 2 Y O℃. If the wetness is less than -1, a portion of the vinyl chloride resin may undergo thermal deterioration, so do not carry out the process below this wetness level (of course, there should be no deviation).

Examples of the molding method include extrusion molding, injection molding, and press molding. Furthermore, molding methods commonly used in the field of vinyl chloride resins, such as the Nukunhink method, press molding using an extruded sheet, and vacuum molding, may also be applied.

As described above, the composition of the present invention has excellent processability, so it can be molded into various shapes by the molding method described above and used in a wide variety of applications.

Furthermore, the uninvented composition may be molded or molded into as many layers as possible depending on the purpose, unless the effects of the present invention are impaired.
'F layer may be used.

1. Examples and Comparative Examples Hereinafter, the present invention will be explained in more detail with reference to Examples.

In the Examples and Comparative Examples, the volume resistivity values were determined by taking specimens measuring 1 cm vertically and 1 cm horizontally from the composite shown in FIG. (1.cm) Conductive silver paste was applied to two places on the front and back. After the base paste has sufficiently dried, check the resistance value between each paste application using a tester (manufactured by 3-phase electric H1 equipment, 5ANWA).
5R-3TR).

The volume resistivity value is obtained by dividing the obtained value by the thickness 1),
Expressed in Ωcm). In addition, to measure the shielding effect of electromagnetic waves, use p, f inverted 3 mm /-1.
A 30 cm number box is made, and a portal oscillator is placed inside 71'j at a predetermined frequency (2(1(l Mllz
)+1t! I added it after 4 sections. This box was placed in a radio anechoic chamber, and the TI wave emitted from the transmitter inside the box was detected using a non-tenna receiver and a micro Shibukawa Electric power detector. The '1; ε wave from the oscillator without the sheet-made box is also the same f〉+', D colit
Measure the sun full box! ' IfrN due to fHHj
Set the ratio of strong voltage (ltV) to F7□ru (d R')
1) Lean-7-/and-to'ili shredded skin 1
``1 shi 9 jfi toshi lko.Furthermore, Preliminary II!Q'
I'm responsible for Asikula Rku Rahoratory (tJ
l,,) was previously measured using the 94 method.

In the case of vinyl chloride-based 11F7, fM unconverted polyethylene, aluminum flakes, aluminum fibers, aluminum powder, and conductive carbon blanks used in Examples and Process Examples, halogen-containing organic compounds were used as flame retardants. , antimony oxide and hydrated inorganic substances have the following shapes and physical properties.

[Vinyl chloride resin (homopolymer)]

As a vinyl chloride-Chinese-German combination, a Sino-German combination with an iJj degree of about 820 [hereinafter referred to as 1' i) V C (1) J]
and the degree of polymerization is approximately 1. I (1 (l's condolence German 1i combination [
Hereinafter referred to as IPVC (2) I] was used.

[Jll, (vinyl resin resin (copolymer)]] J'j
, 11 (vinyl chloride-vinyl acetate co-polymerization with a degree of about 810 [vinyl acetate a 15% by weight, hereinafter referred to as I P VC (3) J)]
It was used.

[Salted malt polyethylene]

Butene-1 was used as chlorinated polyethylene at 30 am'
%, ``Existing ethylene-butene-1 copolymer (density
0.950.9/ccs "l" average molecular weight approximately 20
10,000) was chlorinated in an aqueous suspension, and a non-grade chlorinated polyethylene [chlorine a content 315%, Mooney viscosity (M
L, 4. ) 1.08, hereinafter 1-CP E (a)
J) was manufactured. Also, the density is 0.92], y/
alethylene and butene-1 copolymer (M, ■,
20.9 / ], ' 0 min, main chain carbon atom T-10
Number of alkyl groups per 00: 6, melting point: 120°
By chlorinating C) by the aqueous suspension method, the salt rice content was 40.2%, and the Mooney viscosity (MS1
+4) is 55, polyethylene [1 cPE (hereinafter referred to as b month)] is added to the salt of amorphous 'Ul: -1
Co-1F combination of ethylene and butene-1 containing 3,0 ffl fi1% (density 0.940.!i'/i,
7. Chlorinated crystalline chlorinated polyethylene [chlorine-containing It , 30.8 ff @%, jet containing residual crystals of polyethylene] in an aqueous suspension. ] 5 Tunharu City Haru Mooney viscosity (ML , +, )] I O1 to F' r CP
E (c) J] was used.

[Aluminum flakes]

As aluminum flakes, cross-sectional area: 1 x 1 mmz
Aluminum flakes (hereinafter referred to as iAl flakes) having a thickness of 0.03 mrn and having a thickness of 0.03 mrn were used.

[Aluminum powder]

As aluminum powder, aluminum powder with a particle size of 74 to 150 microns (hereinafter referred to as Fl-Ae powder)
It was used.

[Aluminum fiber]

As an aluminum fiber, the length is approximately Gmm and the z diameter is 65
Micron aluminum fiber (hereinafter referred to as jAe fiber-1) was used.

[Conductive carbon black]

Guide't1. ．． As t'l carbon black, we use furnace fluff with an average particle size of approximately 30 millimeters.
) - Manufactured by Yaposoto, product name Vulcan
XC-72, density approximately 1.8. j9/cc, surface area 2
00n? /g, hereinafter referred to as FrCB-IJ] and Ketjenblack [manufactured by Akzo Hemi, Netherlands, trade name: Ketjenblack, density 1.8, j9' /cc
Surface bond 1195 m'/, j9, hereinafter referred to as cB-2J, was used.

[Halogen-containing organic compound]

As a halogen-containing organic compound, the density is 166gZc
rd is chlorinated paraffin (molecular wind approx. 1.060,
Salt-free nails (approximately 70% by weight, hereinafter referred to as "Salt Ba") were used.

[Antimony oxide]

As antimony oxide, antimony trioxide (hereinafter referred to as 1"l5) 203 J) having a density of 5.25 g/ffl was used.

[Water-containing inorganic substances]

As a water-containing inorganic substance, ultrafine powdered magnesium silicate (density 275.9/Crl, specific surface area 20 m', 'g, particle size 032 to 6 microns, S l023 fi62.5
Ichikawa%, MgO content @30.6'T'i,...%, I%0
Contains 499 Shigekawa City use F rMgO-Sin, J
) was used.

Examples 1 to 8, Comparative Examples 1 to 5 Vinyl chloride resin (30 parts by weight of dioctyl phthalate and 25 parts by weight of dioctyl phthalate as a plasticizer and 3 parts by weight as a stabilizer, respectively) @ Kawabe's tribasic lead sulfate and 1 part dibasic lead sudearate), chlorinated polyethylene and 0' iff mixture, and aluminum (
Al flakes, Al fibers, helium powder, conductive carbon black, a flame retardant, a halogen-containing organic compound, antimony oxide, and a water-containing inorganic substance are mixed in advance in the mixing ratios shown in Table 1. Tri-blending was performed using - for 5 minutes each. Each of the obtained mixtures was processed into resin using a twin-screw extruder (diameter: 30 mm). : Pellets (composition) were produced by extrusion while melt-kneading at a temperature of 230°C.

Using a sheet molding machine preset at 200°C, each composition (pellet) was molded to a thickness of:
(I created a test piece for the fight.

The Izot impact strength (measured according to ASTM D-256-56, No. 1) of the mixture obtained in Example 1 was 1.3 kg·cm / cm. Also, the tensile strength (measured according to JISK6723) is 330kl? /c4, elongation rate (JIS
(measured according to Tgu-6723) was 5%.

Each of the sheets obtained as described above was tested for twistability, volume resistivity, and electromagnetic wave shielding effect. The results are shown in Table 2.

In addition, in Comparative Example 2, it was difficult to mold the sheet.

Table 2 1) From the results of Examples and Comparative Examples with a thickness of 1/8 inch or more, it is clear that the compositions obtained by the present invention not only have good electromagnetic wave shielding properties, but also have halogen-containing organic compounds, It is clear that the flammability is significantly improved by 9'iit compared to a composition that does not contain either antimony oxide or a water-containing inorganic substance.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a specimen for measuring volume resistivity f1^. A and B (front and back) in FIG. 1 are the surfaces coated with conductive silver paste. far V'+out 19 (1 person Showa 7+t,+:Represented by stock company tPerson Patent attorney Sei Kikuchi-・

Claims (1)

[Scope of Claims] A polymer whose C component is vinyl chloride with a degree of polymerization of 400 to 4000, (B) an amorphous or crystalline chlorine content of 20 to 4,000;
5 (l city!?\% chlorinated polyethylene, (C
) conductive carbon black, [F] powdered, fibrous and/or flaky materials of aluminum or aluminum-based alloys, (g) halogen-containing organic compounds, (D) antimony oxide and (G) water-containing A composition consisting of inorganic substances, including polymers mainly composed of vinyl chloride, chlorinated polyethylene, powders, fibers and flakes of aluminum or alloys mainly composed of aluminum, and conductive carbon black. The proportion γ+'1 in the total of chlorinated polyethylene is 1 to 1.
25% by volume, and the conductive carbon blank is 5-50%
The total volume of aluminum or aluminum-based alloy powders, fibers, and flakes is 5 to 50%, or conductive carbon black. Narahi, the powdery material, fibrous material and powdery material have a total d1 of 10~
The proportion of chlorine fL polyethylene in the total of the polymer whose main component is vinyl chloride and the chlorinated polyethylene is at most 40 volume h1%, and the polymer whose main component is vinyl chloride. The blending ratio for the total 100 parts by weight of t'-5 chlorinated polyethylene is:
The halogen-containing organic compound and antimony oxide are each at least 5 parts by weight, but their combined weight is at most 50 parts by weight, and the hydrated inorganic gI is at most 40 parts by weight, but 100 parts by weight. A flame-retardant resin composition in which the proportion of the water-containing inorganic substance to the conductive carbon black is at least 5 parts by weight.