JPH08302202A - Flame-resistant polymer composition - Google Patents

Abstract

PURPOSE: To obtain the subject composition comprising a polymer, a thermally expansible graphite, and a phosphorus compound, not containing a halogen, having high degree flame retardancy, preventing the generation of smoke, and useful as an insulating material for electric wires, etc. CONSTITUTION: A flame-resistant polymer composition contains (A) 100 pts.wt. of one or more kinds of polymers selected from a polystyrene, an elastomer, a polyurethane and a polysiloxane (especially the polystyrene), (B) 1-30 pts.wt. of a thermally expansible graphite, and (C) 1-30 pts.wt. of a phosphorus compound, as essential component. The component C preferably comprises one ore more kinds of phosphoric acid derivatives (especially containing nitrogen selected from phosphate esters, phosphate salts, phosphate ester salts, condensed phosphate salts (especially an ammonium polyphosphate whose surface is coated with a thermosetting resin), and the component B preferably has a particle distribution wherein the particles in an amount of <=20wt.% pass through a sieve of 80 mesh.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polymer material having excellent flame retardancy and suppressing generation of corrosive gas or smoke during combustion.

[0002]

2. Description of the Related Art Polymer materials such as electric wire / cable insulating materials and sheath materials, electric / electronic / OA equipment enclosures and internal parts, vehicle interior materials, building materials, etc. suppress the risk of fire and fire spread. Therefore, flame retardancy is desirable, and many are obligatory. Conventionally, flame retardants such as halogen-based flame retardants, magnesium hydroxide, aluminum hydroxide, red phosphorus, and phosphorus compounds have been proposed for flame retarding polymer materials. However, these also have the following problems and are not always perfect.

For example, halogen-based flame retardants are highly flame retardant (for example, UL-94V-0, V-1, V-2 with a small amount of compound).
Etc.) can be achieved, but soot and smoke are often generated. In addition, when the polymer composition is processed or heated during a fire, acidic substances such as hydrogen halide are generated to some extent, so that corrosion of processing equipment and adverse effects on humans or surrounding equipment at a fire site may occur. I'm worried.

Further, metal hydroxides such as magnesium hydroxide and aluminum hydroxide do not cause smoke generation or corrosive gas generation, but require a large amount of compounding. Therefore, mechanical strength and lightness, which are excellent properties of the polymer, are significantly impaired.

Further, phosphorus-based flame retardants, such as red phosphorus and phosphoric acid esters, are excellent flame retardants capable of achieving a high degree of flame retardancy even in so-called engineering plastics such as polyamide, polyester and polyphenylene oxide. Is. However, the flame-retardant effect is low for general-purpose polymers such as polyolefin and polystyrene.

[0006]

Under these circumstances, there is a need for a flame retardant which does not contain halogen, has low smoke generation, is less likely to generate corrosive gas, and is effective in a small amount. A technique of using heat-expandable graphite in combination with some kind of synergist is disclosed.

For example, in Japanese Patent Laid-Open No. 6-73251,
It is disclosed that polystyrene is made flame-retardant by adding a small amount of red phosphorus and heat-expandable graphite. However, the combined system of heat-expandable graphite and red phosphorus has good flame retardancy, but there is room for improvement in terms of smoke generation. Therefore, as a synergist for the heat-expandable graphite, one having a higher smoke suppressing effect has been required.

[0008]

DISCLOSURE OF THE INVENTION In view of such a current situation, the inventors of the present invention have made earnest researches, and as a result, the specific phosphorus compound described in the above claims has a synergistic effect with the heat-expandable graphite. Therefore, the present invention has been completed and the present invention has been completed, and the present invention has been completed.

That is, the present invention relates to a flame-retardant polymer composition containing the following three components (A), (B) and (C) as essential components.

(A) 1 selected from the group consisting of polystyrene, elastomer, polyurethane and polysiloxane
Or two or more polymers: 100 parts by weight (B) Heat-expandable graphite having a specific volume difference of 100 ml / g or more before and after rapid heating from room temperature to 800 to 1000 ° C .: 1
~ 30 parts by weight.

The component (A) polymer in the present invention is one or more polymers selected from the group consisting of polystyrene, elastomers, polyurethanes and polysiloxanes.

The polystyrene referred to in the present invention is one in which a so-called styrene compound such as styrene, α-methylstyrene, vinyltoluene, vinylnaphthalene is used as a monomer. For example, styrene homopolymer, rubber-modified impact-resistant polystyrene (hereinafter abbreviated as “HIPS”), acrylonitrile-butadiene-styrene copolymer (hereinafter abbreviated as “ABS”), (meth) acrylic rubber or ethylene- Examples thereof include those obtained by graft-copolymerizing an acrylic monomer and a styrene monomer on a propylene copolymer.

The elastomer used in the present invention includes natural rubber (hereinafter abbreviated as NR rubber), styrene butadiene rubber (hereinafter abbreviated as SBR rubber), polybutadiene rubber, polyisoprene, nitrile rubber, acrylate rubber, butyl rubber, epichlorohydrin rubber, Styrene
Examples thereof include butadiene copolymers, styrene-isoprene block copolymers, styrene-ethylene-butene-styrene block copolymers, hydrogenated SBR, and other hydrocarbon elastomers.

Examples of polyurethanes used in the present invention include soft polyurethanes, rigid polyurethane foams, polyurethane fibers and polyurethane coatings produced from isocyanates such as diisocyanates and polyhydric alcohols such as polypropylene glycols.

Examples of the polysiloxane used in the present invention include polyorganosiloxanes having an alkyl group, an alkenyl group, a phenyl group or the like in the side chain, and specifically, silicone elastomer, room temperature curable silicone rubber, low temperature curable type. Examples thereof include silicone elastomers, silicone sealants, silicone resins, and the like.

The present invention is not limited to the case where the above-mentioned polymers are used alone, and two or more kinds thereof, or a mixture with a polymer other than these may be used depending on the required physical properties of the polymer. .

The component (B) in the present invention is heat-expandable graphite. Heat-expandable graphite is a substance derived from natural graphite or artificial graphite, which has the property of expanding in the c-axis direction of crystals by rapid heating from room temperature to 800 to 1000 ° C, and from room temperature to 800 to 1000 ° C. The difference in specific volume before and after rapid heating of 100 ml / g or more. This is 1 if it does not have a swelling property of 100 ml / g or more.
This is because the flame retardancy is remarkably smaller than that of a material having an expansivity of 00 ml / g or more. The swelling property in the present invention means the difference between the specific volume after heating (ml / g) and the specific volume at room temperature.

A method for measuring the swelling property will be specifically described. 2 g of heat-expandable graphite was put into a quartz beaker preheated to 1000 ° C. in an electric furnace, and the quartz beaker was quickly put in an electric furnace heated to 1000 ° C. for 10 seconds, and then 100 ml of the expanded graphite was weighed. , Slack apparent specific gravity (g /
ml) was measured and the specific volume = 1 / loose apparent specific gravity. Next, the specific volume of the heat-expandable graphite at room temperature which was not heated was determined by the same method, and the expansivity of the heat-expandable graphite was determined as the expansivity = specific volume after heating−specific volume at room temperature. .

When the heat-expandable graphite of the present invention was observed with an electron microscope before and after expansion, it was found that expansion was hardly observed in the a-axis direction and the b-axis direction, and expansion was observed only in the c-axis direction.

The method for producing the heat-expandable graphite of the present invention is not particularly limited, but it can be obtained by, for example, oxidizing natural graphite or artificial graphite. Examples of the oxidation treatment include treatment with an oxidizing agent such as hydrogen peroxide or nitric acid in sulfuric acid. The heat-expandable graphite of the present invention can also be produced by reducing graphite. Examples of the reduction treatment include treatment with sodium naphthalenide or the like in an aprotic organic solvent.

The particle size of the heat-expandable graphite of the present invention affects the flame retardant effect. A preferable particle size distribution is 20% by weight or less, more preferably 20 to 1% by weight, having a particle size of 80 mesh. If the particles having a particle size passing through a 80-mesh sieve are larger than 20% by weight, the flame retardant effect is insufficient. When the particle size of the particles passing through a 80-mesh sieve is less than 1% by weight, the shape retention performance of the resin composition when exposed to flame may be slightly deteriorated.

The heat-expandable graphite preferably has a particle size larger than a certain extent as described above, but in order to suppress the deterioration of the physical properties of the polymer composition due to the incorporation of large particles, the surface of the heat-expandable graphite is Butyltrimethoxysilane, hexyltrimethoxysilane, octyltrimethoxysilane, decyltrimethoxysilane, dodecyltrimethoxysilane, tetradecyltrimethoxysilane, hexadecyltrimethoxysilane, and other alkyltrialkoxysilanes, vinyltrimethoxysilane, vinyl Triethoxysilane, N- (2-aminoethyl) 3-aminopropylmethyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2 -(3 -Epoxycyclohexyl) ethyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, and other silane coupling agents, isopropyltriisostearoyl titanate, isopropyltridecylbenzenesulfonyl titanate, isopropyltris (dioctyl) Pyrophosphate) titanate, tetraisopropyl bis (dioctyl phosphite) titanate, tetraoctyl bis (ditridecyl phosphite)
Titanate, tetra (2,2-diallyloxymethyl-
Surface treatment with a titanate coupling agent such as 1-butyl) bis (di-tridecyl) phosphite titanate, bis (dioctylpyrophosphate) oxyacetate titanate, and bis (dioctylpyrophosphate) ethylene titanate is also a preferred embodiment.

Since the heat-expandable graphite is produced by the oxidation treatment in sulfuric acid as described above, it may be slightly acidic depending on the production conditions. In that case, by causing an alkaline substance such as magnesium hydroxide or aluminum hydroxide to coexist, it is possible to suppress device corrosion during the production and processing of the polymer composition. It is efficient that these alkaline substances are preferably present in the vicinity of the heat-expandable graphite. Therefore, it is preferable that these alkaline substances be pre-mixed with the heat-expandable graphite to be attached to the surface of the heat-expandable graphite particles. It is sufficient that the amount of the alkaline substance compounded is less than 10% by weight based on the heat-expandable graphite.

The component (C) in the present invention is a phosphorus compound. The phosphorus compound is not particularly limited as long as it has a synergistic action with the heat-expandable graphite of the component (B) and has an effect of suppressing smoke generation. "), And examples thereof include phosphates, salts of phosphoric acid esters, and condensed phosphates. Among them, those containing nitrogen have high flame retardancy. Specific examples thereof include nitrogen-containing phosphates such as ammonium polyphosphate, melamine-modified ammonium polyphosphate, melamine polyphosphate, and melamine phosphate, among which ammonium polyphosphate is most preferable because it has a high phosphorus content. . Particularly in applications where water resistance is required, ammonium polyphosphate whose surface is coated with a thermosetting resin such as melamine resin, urea resin and phenol resin is preferable.

The combined use of these phosphorus compounds and heat-expandable graphite is novel except for the polyolefin polymer. JP-A-6-25476 describes the combined use of a phosphorus compound and heat-expandable graphite.
However, this is a disclosure of flame retardant technology limited to polyolefin-based polymers. In general, even if the same flame retardant is used, the flame retardant performance is often greatly different if the applied polymer is different, and it can be expected that the flame retardant effective for polyolefin is effective for other polymers as well. Not a thing.

The mixing ratio of the above-mentioned components (A), (B) and (C) is (B) based on 100 parts by weight of the component (A).
And component (C) is 1 to 30 parts by weight, respectively. If the amount of each of the components (B) and (C) is less than 1 part by weight, the flame retardancy is insufficient. On the other hand, if the amount exceeds 30 parts by weight, the flame retardant effect is little increased and the physical properties of the polymer are deteriorated.

Another embodiment of the present invention is (A), (B)
In addition to the three components of (C) and (C), red phosphorus is used in combination. Since the component (C) is a phosphorus compound, the content of phosphorus, which is a flame retardant element, is lower than that of red phosphorus. By using a small amount of red phosphorus, which is a simple substance of phosphorus, it is possible to achieve a high degree of flame retardancy and low smoke generation with a smaller total amount of flame retardant than a system that does not use red phosphorus.

As red phosphorus, from the viewpoint of handling safety,
It is particularly preferable that the surface is surface-treated with one or more compounds selected from the group consisting of thermosetting resins and inorganic compounds.

The thermosetting resin used for coating red phosphorus is not particularly limited, but preferable examples thereof include phenol resin and melamine resin. Similarly, the inorganic compound used for coating is not particularly limited, but preferable examples thereof include hydroxides or oxides of magnesium, aluminum, nickel, iron, cobalt and the like.

The blending amount of red phosphorus used in combination is that of polymer 10
It is 0.1 to 20 parts by weight with respect to 0 parts by weight.
If it is less than 0.1 part by weight, the flame retardance is insufficient, while 2
When the amount is more than 0 parts by weight, the flame retardant effect is not significantly increased.

Other flame retardants, for example, metal hydroxides such as magnesium hydroxide and aluminum hydroxide can be used in combination with the polymer composition of the present invention within a range that does not impair the effects of the present invention. Further, if necessary, various additives such as an inorganic filler, a colorant, an antioxidant, a light stabilizer, a light absorber, a plasticizer, a process oil, a cross-linking agent and a foaming agent can be added.

Further, water crosslinking, ionizing radiation crosslinking and the like are also possible.

[0033]

As described above, the flame retardant technique of the present invention provides a polymer composition containing no halogen, having a high degree of flame retardancy, and suppressing smoke generation.

[0034]

EXAMPLES The effects of the present invention will be clarified below with reference to specific examples, but the present invention is not limited to these examples.

In the following examples and comparative examples, the following raw materials were used.

Component (A) (A1): HIPS (manufactured by Mitsubishi Chemical Co., Ltd., HT-65) (A2): ABS (manufactured by Toray Industries, Inc., TOYOLAC 100) (A3): Natural rubber (made in Malaysia, RSS) -3) 10
Based on 0 parts by weight, 2.5 parts by weight of sulfur, 5 parts by weight of zinc flower (manufactured by Sakai Chemical Co., Ltd., No. 1), 2 parts by weight of stearic acid, hard top clay (manufactured by Shiraishi Calcium Co., Ltd.) 7
5 parts by weight, accelerator CZ (Nouchira CZ, manufactured by Ouchi Shinko Co., Ltd.) 1.25 parts by weight, accelerator TT (Ouchi Shinko Co., Ltd.)
Manufactured by Nox Cellar TT) and 1 part by weight of an antioxidant (Nocracco 810A, manufactured by Ouchi Shinko Co., Ltd.) are kneaded with a roll.

(A4): Based on 100 parts by weight of SBR (Sorprene 1502, manufactured by Asahi Kasei Co., Ltd.), 6 parts by weight of sulfur, 2 parts by weight of zinc white (No. 1, manufactured by Sakai Chemical Co., Ltd.), and stearic acid 2 0.5 parts by weight, white carbon (manufactured by Nippon Silica Co., Ltd., Nipseal VN3) 55 parts by weight, naphthene oil (manufactured by Idemitsu Kosan Co., Ltd., Diana Prooses Oil) 20 parts by weight, diethylene glycol 5.5 parts by weight,
Accelerator DM (Ouchi Shinko Co., Ltd., Nox Cellar DM) 1.
7 parts by weight, accelerator D (Ouchi Shinko Co., Ltd., NOXCELLER D) 0.6 parts by weight, and antioxidant (Ouchi Shinko Co., Ltd., Nocrac SP) 1 part by weight were compounded by rolls.

(A5): 100 parts by weight of polyether polyol (MN-3050 manufactured by Mitsui Toatsu Co., Ltd.), tolylene diisocyanate (manufactured by Nippon Polyurethane Co., T-)
80) 55 parts by weight, 4 parts by weight of water, 0.3 parts by weight of triethylenediamine (manufactured by Tosoh Corporation), 0.2 parts by weight of N-ethylmorpholine (manufactured by Nippon Emulsifier Co., Ltd., NEM), neostandioctate ( Nitto Kasei Co., Ltd., U-28)
0.35 parts by weight, 1.2 parts by weight of silicone foam stabilizer (L-580 manufactured by Nippon Unicar Co., Ltd.), dichloromethane 1
0 parts by weight.

(A6): Polymethyl vinyl silicone rubber compound (manufactured by Shin-Etsu Chemical Co., Ltd., KE-650-)
U) 100 parts by weight of 2,5-dimethyl-2,5-bis (tertiarybutylperoxy) -hexane about 25
% C-8 vulcanizing agent (manufactured by Shin-Etsu Chemical Co., Ltd.) 2 parts by weight compound.

Component (B) (B1): Surface-untreated heat-expandable graphite (CA-60 manufactured by Chuo Kasei Co., Ltd.) (B2): Surface-treated heat-expandable graphite (center) CA-60S manufactured by Kasei Co., Ltd. (B3): Heat-expandable graphite (C-60N manufactured by Chuo Kasei Co., Ltd.) premixed with magnesium hydroxide (blending amount: several% by weight based on the heat-expandable graphite). ) Table 1 shows the expandability and particle size distribution of B1 to B3.

[0041]

[Table 1]

Component (C) (C1): Ammonium polyphosphate surface-treated with melamine resin (Nova White PA-6 manufactured by Phosphorus Chemical Co., Ltd.) (C2): Surface-untreated ammonium polyphosphate (Phosphorus Chemical Industry) (NOVA WHITE PA-2 manufactured by Co., Ltd.).

Component D (D1): Surface-treated red phosphorus (Nova Red 120 manufactured by Phosphorus Chemical Co., Ltd.) Component E (bromine flame retardant) (E1): Brominated epoxy polymer (Toto Kasei Co., Ltd.)
Manufactured by TB-60) and antimony trioxide weight ratio 7/1
Mixture (E2): chlorinated polyethylene (manufactured by Daiso Co., Ltd., G
235), tetrabromobisphenol A (manufactured by Tosoh Corporation, flame cut 120G) and antimony trioxide in a weight ratio of 5/22/8 (E3): decabromodiphenyl oxide (manufactured by Tosoh Corporation, flame cut 110R) ) And antimony trioxide in a weight ratio of 3/1 (E4): chlorinated paraffin (A-7, manufactured by Tosoh Corp.)
0) and antimony trioxide in a weight ratio of 1/1 (E5): tris (chloropropyl) phosphate (Phiroll PCF manufactured by Akzo Kashima Co., Ltd.).

Examples 1 to 12 and Comparative Examples 1 to 8 The raw materials were extruded and kneaded in the mixing ratios shown in Table 2 (210
℃), injection molding (210 ℃, cooling temperature 45 ℃, mold clamping pressure 5
The test piece was prepared by 3 ton). Flame retardancy is UL-
It was evaluated by the 94 vertical burning test. Smoke emission is NBS
It was measured in the flame mode of the method. The thickness of the smoke emission test piece is 1/16 inch for HIPS (A1) and ABS (A
In 2), it was set to 1/32 inch. Table 2 shows the results. In the table, the maximum smoke density (Dm
ax).

[0045]

[Table 2]

First, the case where impact-resistant polystyrene (A1) is used as the component (A) will be described. In Comparative Examples 2 and 3 in Table 2, no improvement in flame retardancy is observed with the components (B) and (C) (heat-expandable graphite) alone. However, as shown in Examples 1 to 9, it is clear that the combined use of the component (B) and the component (C) achieves a high degree of flame retardancy with respect to the impact-resistant polystyrene, which is a synergistic effect. It is also shown from Examples 3 and 7 that the surface treatment of ammonium polyphosphate does not adversely affect the flame retardancy. It is clear from Examples 3, 8 and 9 that the surface treatment and the magnesium hydroxide treatment of the heat-expandable graphite as the component (B) do not affect the flame retardancy. Red phosphorus (D component) in addition to (B) and (C) components
It is shown in Example 10 that the compounding amount of the whole flame retardant can be reduced by using together. It is clear from the comparison between Examples 1 to 9 and Comparative Example 5 that the flame retardant technology of the present invention significantly suppresses the smoke generation property as compared with the case where the brominated flame retardant is blended. Further, the smoke suppressing effect of the present invention is greater than that of the combined use of heat-expandable graphite and red phosphorus (Comparative Example 4). Even when ABS (A2) is used as the component (A), the high flame retardancy and low smoke generation are exhibited by the present invention as in the case of using (A1). Is clear from.

Examples 13 to 16 and Comparative Examples 9 to 10 Natural rubber or SBR was used as an elastomer, and the raw materials were roll-kneaded at the compounding ratio shown in Table 3 (60 ° C., 20 ° C.).
Min) and vulcanization by compression molding (160 ° C., 150 Kg / cm ² ) to prepare a test piece. The flame retardancy of the obtained elastomer composition was evaluated by the oxygen index (hereinafter abbreviated as OI) according to JIS K 7201 for smoke emission (Dmax) in the flame mode of the NBS method. The results are shown in Table 3.

[0048]

[Table 3]

As shown in Table 3, it can be seen that the flame-retardant elastomer compositions of the examples exhibit extremely high flame retardancy and low smoke generation properties as compared with the comparative examples.

Examples 17 to 18 and Comparative Example 11 When obtaining a polyurethane, test materials were prepared by mixing and reacting the raw materials at a mixing ratio shown in Table 4 at room temperature. The obtained polyurethane composition had a flame-retardant evaluation method (combustion distance) based on FMVSS-302 and smoke emission (D) in a flame mode of NBS method.
max) was evaluated. The results are shown in Table 4.

[0051]

[Table 4]

As shown in Table 4, it can be seen that the flame-retardant polyurethane compositions of the examples exhibit extremely high flame retardancy and low smoke generation properties as compared with the comparative examples.

Examples 19 to 20 and Comparative Example 12 Polymethylvinylsiloxane rubber compound was used as the polysiloxane, and the raw materials were roll-kneaded at the compounding ratio shown in Table 5 (30 ° C., 15 minutes) and compression molded (170 ° C.). ，
A test piece was prepared by vulcanizing at 120 Kg / cm ² ).

The obtained polysiloxane composition was measured according to JIS
Flame retardant evaluation method (OI) and NBS based on K 7201
The smoke emission (Dmax) was evaluated in the flame mode of the method. The results are shown in Table 5.

[0055]

[Table 5]

As shown in Table 5, it can be seen that the flame-retardant polysiloxane compositions of the examples exhibit extremely high flame retardancy and low smoke generation properties as compared with the comparative examples.

Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location C08K 9/04 KJP C08K 9/04 KJP C08L 21/00 KCT C08L 21/00 KCT 25/04 KFV 25/04 KFV 83/04 LRS 83/04 LRS (72) Inventor Genichiro Ochiai 4-2-1 Togashira, Toride-shi, Ibaraki Prefecture

Claims (11)

[Claims] 1. A flame-retardant polymer composition comprising the following three components (A), (B) and (C) as essential components. (A) One or more polymers selected from the group consisting of polystyrene, elastomer, polyurethane and polysiloxane: 100 parts by weight (B) Difference in specific volume before and after rapid heating from room temperature to 800 to 1000 ° C. is 100 ml / G or more of heat-expandable graphite: 1
-30 parts by weight (C) Phosphorus compound: 1-30 parts by weight 2. The flame-retardant polymer composition according to claim 1, wherein the polymer is polystyrene. 3. The phosphorous compound is one or more phosphoric acid derivatives selected from the group consisting of phosphoric acid esters, phosphoric acid salts, phosphoric acid ester salts and condensed phosphoric acid salts. The flame-retardant polymer composition according to claim 1 or claim 2. 4. The flame-retardant polymer composition according to claim 3, wherein the phosphorus compound is a phosphoric acid derivative containing nitrogen. 5. The flame-retardant polymer composition according to claim 3, wherein the condensed phosphate is ammonium polyphosphate. 6. The flame-retardant polymer composition according to claim 5, wherein ammonium polyphosphate is surface-coated with a thermosetting resin. 7. The heat-expandable graphite according to claim 1, wherein the heat-expandable graphite has a particle size distribution of 20% by weight or less having a particle size passing through a 80-mesh sieve. Flammable polymer composition. 8. The heat-expandable graphite is surface-treated with one kind or two or more kinds selected from the group consisting of a silane coupling agent and a titanate coupling agent. The flame-retardant polymer composition according to any one of 1. 9. The flame-retardant polymer composition according to claim 1, wherein the heat-expandable graphite is previously mixed with magnesium hydroxide and / or aluminum hydroxide. . 10. In addition to the three components (A), (B) and (C) described in claim 1, 0.1 to 20 red phosphorus is further added.
The composition according to any one of claims 1 to 9, further comprising:
The flame-retardant polymer composition according to any one of 1. 11. The flame retardant composition according to claim 10, wherein the red phosphorus is surface-treated with one or more compounds selected from the group consisting of thermosetting resins and inorganic compounds. Polymer composition.