JP2002332412A - Fiber-reinforced, flame-retardant polymer composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber-reinforced, flame-retardant polymer composition having superior mechanical strengths such as impact strength and rigidity, and excellent extrusion stability. SOLUTION: This fiber-reinforced, flame-retardant polymer composition comprises (A) a polymer, (B) a silicon compound and (C) fibers having 0.01-1,000 μm average fiber diameter in 2-10,000 aspect ratio (length/diameter).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a fiber-reinforced flame-retardant polymer composition. More specifically, the present invention relates to a fiber-reinforced flame-retardant polymer composition having excellent mechanical strength such as excellent impact strength and rigidity, and excellent extrusion stability.

[0002]

2. Description of the Related Art Polymers such as thermoplastic polymers are excellent in impact resistance and flexibility in addition to excellent moldability. Used in a variety of fields. In recent years, inorganic fillers have been added in such fields to improve the mechanical strength of materials, especially rigidity, but in order to impart high mechanical strength, a large amount of inorganic fillers are added. Therefore, there is a problem that embrittlement of the polymer or a decrease in fluidity is caused.

[0003] In order to solve this problem, the present inventor has found that the anisotropy is exhibited and the mechanical strength is remarkably improved by blending a specific fiber. On the other hand, the Japan Rubber Association, Vol. 69, No. 9, p. 615 (1996) discloses short fiber reinforcement of a thermoplastic elastomer.
However, although the fiber-reinforced elastomer disclosed in the above publication has excellent impact strength, rigidity and flame retardancy are insufficient, so that the flame-retardant polymer composition has excellent flame retardancy, mechanical strength and extrusion stability. Development is required.

[0004]

SUMMARY OF THE INVENTION In view of the above situation, the present invention has no such problems as mentioned above, namely, a fiber-reinforced flame retardant having excellent mechanical strength such as impact strength and rigidity and excellent extrusion stability. It is an object to provide a water-soluble polymer composition.

[0005]

Means for Solving the Problems The present inventors diligently studied a flame-retardant polymer composition having excellent mechanical strength, and as a result, surprisingly, by using a specific fiber, the flame-retardant polymer It has been found that the mechanical strength and extrusion stability are dramatically improved, and the present invention has been completed. More specifically, the composition of the present invention comprises (A) a polymer, (B) a silicon-based compound, and (C)
Although it is a flame-retardant polymer composition consisting of specific fibers,
(C) Flame-retardant while maintaining extrusion stability by containing fibers having an average fiber diameter of 0.01 to 1,000 μm and an aspect ratio (length / diameter) of 2 to 10,000. The present inventors have found that properties and mechanical strength, particularly impact strength and rigidity, are improved, and completed the present invention.

That is, the present invention provides: (A) polymer, (B)
A silicon-based compound, and (C) an average fiber diameter of 0.01 to
1. A fiber-reinforced flame-retardant polymer composition comprising fibers having a size of 1,000 μm and an aspect ratio (length / diameter) of 2 to 10,000. (A) The fiber-reinforced flame-retardant polymer composition according to 1 above, wherein the polymer is an aromatic thermoplastic polymer; (B) The fiber-reinforced flame-retardant polymer composition according to any one of the above 1 or 2, wherein the silicon-based compound is an organic silicon compound.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. The component of the polymer (A) in the present invention is a polymer such as a rubber-like polymer, a thermoplastic resin, or a thermosetting resin, and among them, a thermoplastic resin is preferable. In the present invention, the thermoplastic resin which is the most preferable polymer in (A) includes, for example, polyaromatic vinyl, polycarbonate, polyphenylene ether, polyolefin, polyvinyl chloride, polyamide, polyester, Polyphenylene sulfides, polymethacrylates, and the like can be used alone or in combination of two or more. In particular, a polyaromatic vinyl-based, polycarbonate-based, or polyphenylene ether-based thermoplastic polymer is extremely preferable.

As the combination of (A), an aromatic polycarbonate and an aromatic vinyl polymer, or an aromatic vinyl polymer and a polyphenylene ether are each used.
Most preferred are the components or three components of aromatic polycarbonate, aromatic vinyl polymer and polyphenylene ether. In the present invention, the aromatic polycarbonate used as the component (A) can be selected from an aromatic homopolycarbonate and an aromatic copolycarbonate. The production method includes a phosgene method in which phosgene is blown into a bifunctional phenolic compound in the presence of a caustic alkali and a solvent, or a transesterification method in which a bifunctional phenolic compound is transesterified with diethyl carbonate in the presence of a catalyst. Can be mentioned. The aromatic polycarbonate preferably has a viscosity average molecular weight of 10,000 to 100,000.

Here, the bifunctional phenolic compounds are 2,2'-bis (4-hydroxyphenyl) propane, 2,2'-bis (4-hydroxy-3,5-dimethylphenyl) propane, bis ( 4-hydroxyphenyl) methane, 1,1′-bis (4-hydroxyphenyl) ethane, 2,2′-bis (4-hydroxyphenyl) butane, 2,2′-bis (4-hydroxy-3,5
-Diphenyl) butane, 2,2'-bis (4-hydroxy-3,5-dipropylphenyl) propane, 1,1 '
-Bis (4-hydroxyphenyl) cyclohexane, 1
-Phenyl-1,1'-bis (4-hydroxyphenyl) ethane and the like, and 2,2'-bis (4-hydroxyphenyl) propane [bisphenol A] is particularly preferable. In the present invention, the bifunctional phenolic compounds may be used alone or in combination.

In the present invention, the polystyrene-based polymer as the component (A) is at least one aromatic aromatic resin selected from a rubber-modified aromatic vinyl resin, a non-rubber-modified aromatic vinyl resin, and an aromatic vinyl thermoplastic elastomer. It is a vinyl polymer. The rubber-modified aromatic vinyl-based resin comprises an aromatic vinyl-based resin matrix and rubber particles dispersed therein, and the aromatic vinyl-based resin is an aromatic vinyl monomer in the presence of a rubber-like polymer. And, if desired, a vinyl monomer copolymerizable therewith is added, and the monomer (or a mixture thereof) is subjected to rubber polymerization by a known bulk polymerization method, bulk suspension polymerization method, solution polymerization method, or emulsion polymerization method. It can be obtained by graft-polymerizing a polymer in the form of a polymer.

Examples of such polymers include impact-resistant polystyrene, ABS resin (acrylonitrile-butadiene-styrene copolymer), AAS resin (acrylonitrile-acryl rubber-styrene copolymer), and AES resin (acrylonitrile- Ethylene-propylene rubber-styrene copolymer). Here, the rubbery polymer preferably has a glass transition temperature (Tg) of −30 ° C. or lower, and if it exceeds −30 ° C., the impact resistance decreases.

Examples of such rubbery polymers include diene rubbers such as polybutadiene, poly (styrene-butadiene) and poly (acrylonitrile-butadiene).
And hydrogenated hydrogenated diene rubber, isoprene rubber, chloroprene rubber, acrylic rubber such as polybutyl acrylate, and ethylene-propylene-diene monomer terpolymer (EPDM). A system rubber is preferred.

The aromatic vinyl monomer as an essential component in the graft polymerizable monomer mixture to be polymerized in the presence of the rubbery polymer is, for example, styrene, α-methylstyrene, paramethylstyrene or the like. Yes, styrene is most preferred, but other aromatic vinyl monomers described above may be copolymerized mainly with styrene. In addition, as a component of the rubber-modified aromatic vinyl resin in (A), one or more monomer components copolymerizable with the aromatic vinyl monomer can be introduced as necessary. When it is necessary to increase oil resistance, unsaturated nitrile monomers such as acrylonitrile and methacrylonitrile can be used.

If it is necessary to lower the melt viscosity during blending, an acrylate comprising an alkyl group having 1 to 8 carbon atoms can be used. Further, when it is necessary to further increase the heat resistance of the resin composition, α-methylstyrene, acrylic acid, methacrylic acid,
Monomers such as maleic anhydride and N-substituted maleimide may be copolymerized. The content of the vinyl monomer copolymerizable with the vinyl aromatic monomer in the monomer mixture is from 0 to 40.
% By weight.

The rubbery polymer in the rubber-modified aromatic vinyl resin is preferably from 5 to 80% by weight, particularly preferably from 10 to 50% by weight, and the graft-polymerizable monomer mixture is preferably from 95 to 20% by weight. %, More preferably 90
５０50% by weight. Within this range, the balance between impact resistance and rigidity of the target resin composition is improved.
Further, the rubber particle diameter of the styrene polymer is 0.1 to
5.0 μm is preferable, and 0.2 to 3.0 μm is particularly preferable. Within the above range, impact resistance is particularly improved.

The reduced viscosity ηsp / c (0.5 g / d) of the resin portion, which is a measure of the molecular weight of the rubber-modified aromatic vinyl resin.
1, 30 ° C. measurement: toluene solution when the matrix resin is polystyrene, methyl ethyl ketone when the matrix resin is an unsaturated nitrile-aromatic vinyl copolymer)
Is preferably in the range of 0.30 to 0.80 dl / g, and more preferably in the range of 0.40 to 0.60 dl / g. Reduced viscosity η of rubber-modified styrenic resin
Means for satisfying the above requirements regarding sp / c include adjustment of the amount of polymerization initiator, polymerization temperature, and amount of chain transfer agent.

As a method for producing the rubber-modified aromatic vinyl resin, particularly, a uniform polymerization stock solution comprising a rubbery polymer, a monomer (or a monomer mixture), and a polymerization solvent is continuously mixed with a stirrer. A bulk polymerization method in which the mixture is supplied to a multi-stage bulk polymerization reactor, and is continuously polymerized and devolatilized, is preferable. When a rubber-modified styrene polymer is produced by a bulk polymerization method, the reduced viscosity ηsp
The control of / c can be performed by the polymerization temperature, the type and amount of the initiator, the solvent, and the amount of the chain transfer agent. When a monomer mixture is used, the copolymer composition can be controlled by the charged monomer composition. The control of the rubber particle diameter can be performed by the stirring rotation speed. That is, the reduction in particle size can be achieved by increasing the rotation speed, and the increase in particle size can be achieved by reducing the rotation speed.

The aromatic vinyl-based thermoplastic elastomer (A) used in the present invention is a block copolymer comprising an aromatic vinyl unit and a conjugated diene unit, or wherein the conjugated diene unit is partially hydrogenated. This is a block copolymer obtained. The aromatic vinyl monomer constituting the block copolymer is, for example, styrene, α-
Methylstyrene, paramethylstyrene, p-chlorostyrene, p-bromostyrene, 2,4,5-tribromostyrene and the like, and styrene is most preferred. It may be copolymerized.

The conjugated diene monomer constituting the block copolymer includes 1,3-butadiene, isoprene and the like. In the block structure of the block copolymer, a polymer block composed of an aromatic vinyl unit is represented by S, and a polymer block composed of a conjugated diene and / or a partially hydrogenated unit thereof is represented by B. In this case, SB, S (BS) n (where n is 1 to 3)
), A linear block copolymer of S (BSB) n (where n is an integer of 1 to 2) or (SB) n X
(However, n is an integer of 3 to 6. X is a residue of a coupling agent such as silicon tetrachloride, tin tetrachloride, or a polyepoxy compound.)
Star shape with the B part as the bonding center
It is preferably a block copolymer. Above all, SB
Type 2, SBS type 3, and SBSB type 4 linear-block copolymers are preferred.

In the present invention, one of the polyphenylene ethers as the component (A) is a homopolymer and / or a copolymer having an aromatic ring in the main chain and linked by an ether bond. , Poly (2,6-dimethyl-1,4
-Phenylene ether), a copolymer of 2,6-dimethylphenol and 2,3,6-trimethylphenol, and the like are preferable, and among them, poly (2,6-dimethyl-1,4-phenylene ether) is preferable.

The method for producing the polyphenylene ether is not particularly limited. For example, a complex of a cuprous salt and an amine according to the method described in US Pat. No. 3,306,874 is used as a catalyst, For example, it can be easily produced by oxidative polymerization of 2,6 xylenol. In addition, U.S. Patent No. 3,306,875, U.S. Patent No. 3,257,357, and U.S. Patent No. 3,257,358 No. and Japanese Patent Publication No. 52-1
It can be easily produced by the methods described in JP-A-7880 and JP-A-50-51197.

The above polyphenylene ether used in the present invention
The reduced viscosity ηsp / c (0.5 g / dl, chloroform solution, measured at 30 ° C.) of Ter is 0.20 to 0.70 dl /
g, preferably 0.30 to 0.60 d
More preferably, it is in the range of 1 / g. As a means for satisfying the above requirements regarding the reduced viscosity ηsp / c of the polyphenylene ether, adjustment of the amount of a catalyst in the production of the polyphenylene ether and the like can be mentioned.

In the present invention, the silicon compound (B) used as the component (B) is preferably an organic silicon compound, and more preferably a polyorganosiloxane represented by silicone or organic silicate. The above-mentioned polyorganosiloxanes are classified into oil, resin and rubber according to their properties. The oil is a linear or cyclic polydiorganosiloxane, and the resin is a monofunctional R ₃ SiO _1/2
, A D unit represented by a bifunctional R ₂ SiO, a T unit represented by a trifunctional RSiO _3/2 , a Q unit represented by a tetrafunctional SiO ₂ , and an alkoxy or aryloxy compound. R (RO) SiO _2.0 (X unit), (R
O) ₂ SiO _3.0 (Y unit) is a linear polyorganosiloxane containing a branched structure or a silicone resin having a three-dimensional network structure, which can be formed by combining structural units of Y. And vulcanized polydiorganosiloxane.

Other polyorganosiloxanes include modified polyorganosiloxanes modified with epoxy, amino, mercapto, methacrylic groups, etc., polycarbonate (PC) -silicone copolymers, acrylic rubber-silicone composites and the like. In the present invention, one of the preferred organosilicon-based compounds is a linear or cyclic polydiorganosiloxane, which contains an aromatic group, among others.
The kinematic viscosity at 25 ° C specified by S-K2410 is 10 mm.
² / sec or more, more preferably 100 mm ² / sec or more, and still more preferably 1000 m ² / sec.
m ² / sec or more.

In the present invention, another preferred organosilicon compound is a linear or cyclic polyorganosiloxane having a branched structure (branched silicone) or a silicone resin having a three-dimensional network structure (crosslinked silicone resin). Such silicones are known as RSiO
_1.5 (T unit) and / or RSiO _1.0 (D unit). If necessary, R ₃ SiO _0.5 (M unit), SiO
_2.0 (Q unit), R (RO) SiO _2.0 (X unit), (R
O) ₂ SiO _3.0 (Y unit) may be contained.

Here, R is a hydrocarbon having 1 to 20 carbon atoms, preferably a methyl group, an ethyl group, a butyl group, a phenyl group, or a benzyl group, particularly preferably a group containing a methyl group and a phenyl group. When the phenyl group is contained in an amount of 10% by weight or more, the water resistance, the thermal stability, and the compatibility with the aromatic resin are improved. In the (B) silicon-based compound of the present invention, a branched, cross-linked, linear,
It is preferable that the component of the cyclic structure is 50% by weight or less.

In particular, cyclic polyorganosiloxanes have higher volatility than linear, branched or crosslinked polyorganosiloxanes and cause mold contamination during processing, which is not preferred. The most preferred component (B) in the present invention is a linear polyorganosiloxane having at least one aromatic group in the molecule and having a weight average molecular weight of 500 to 500.
5,000, more preferably 500 to 2,000, and among components (B), components having a molecular weight of 1,000 or less
0% by weight or less, more preferably 4% by weight or less.
0% by weight or less, more preferably 30% by weight or less, most preferably 20% by weight or less, very preferably 10% by weight
It is as follows.

The amount of (B) is 0.01 to 200 parts by weight, preferably 0.1 to 100 parts by weight of (A).
100 parts by weight, more preferably 1 to 50 parts by weight, still more preferably 1 to 20 parts by weight, most preferably 1 to 10 parts by weight. The fiber used as (C) in the present invention is a fiber in a broad sense including a filler having anisotropy including a plate-like filler, and is not particularly limited. The average fiber diameter of (C) is 0.01 to 1000 μm, preferably 0.1 to 500 μm, more preferably 1 to 100 μm.
m, most preferably 5 to 50 μm, and an aspect ratio (length / diameter) of 2 to 10,000, preferably 50 to 500, more preferably 50 to 300, most preferably 100 to 200. is there.

When the average fiber diameter is less than 0.01 μm, the reinforcing effect is small and the mechanical strength is inferior.
If it exceeds μm, the dispersibility decreases, and the mechanical strength similarly decreases. When the aspect ratio (length / diameter) is less than 2, the anisotropy is insufficient, and the flame retardancy improving effect and the reinforcing effect are small. On the other hand, when it exceeds 10,000, it is cut at the time of kneading to reduce the reinforcing effect. lose. The above (C) is cotton, silk, wool,
Natural fibers such as hemp, regenerated fibers such as rayon and cupra, semi-synthetic fibers such as acetate and promix, synthetic fibers such as polyester, polyacrylonitrile, polyamide, aramid, polyolefin, carbon and vinyl, and inorganic fibers such as glass and asbestos Or a filler such as a fiber such as a metal fiber or a plate-like talc, kaolin or a viscous compound.

In the present invention, (C) is particularly preferably an aramid fiber, a polyacrylonitrile fiber or a glass fiber. The aramid fiber can be produced by dissolving isophthalamide or polyparaphenylene terephthalamide in an amide-based polar solvent or sulfuric acid and spinning the solution by a wet or dry method. The polyacrylonitrile fiber is prepared by dissolving a polymer in a solvent such as dimethylformamide and dry-spinning in a stream of air at 400 ° C. or dry-spinning by dissolving the polymer in a solvent such as nitric acid and wet-spinning in water. It is manufactured by the method. Also, (C)
Is subjected to a surface treatment with maleic anhydride or a silane coupling agent to further promote the fiber reinforcing effect.

The amount of (C) is 0.1 to 200 parts by weight, preferably 1 to 15 parts by weight, per 100 parts by weight of (A).
0 parts by weight, more preferably 10 to 100 parts by weight, still more preferably 20 to 100 parts by weight, most preferably 30 to 7 parts by weight.
0 parts by weight. In the present invention, if necessary, (B)
Other flame retardants (D) can be blended, and are sulfur-based, phosphorus-based, nitrogen-based, inorganic-based flame retardants, or halogen-based flame retardants.

Examples of the sulfur-based flame retardant (D) include metal salts of organic sulfonates such as potassium trichlorobenzenesulfonate, potassium perfluorobutanesulfonate, potassium diphenylsulfon-3-sulfonate, and aromatic sulfonimides. Metal salts, metal salts of sulfonic acid, metal salts of sulfuric acid, metal salts of phosphoric acid, metal salts of boric acid or ammonium salts of the above-mentioned acids, and metal salts, or aromatic rings of polymers containing aromatic groups such as styrene-based polymers and polyphenylene ether. Sulfur-based flame retardants, such as polystyrene sulfonate alkali metal salts, to which phonium salts and the like are bound. Such a sulfur-based flame retardant promotes a decarboxylation reaction at the time of combustion, particularly when polycarbonate is used as a polymer, to improve flame retardancy. Further, in the case of the alkali metal polystyrene sulfonate, the metal sulfonate itself becomes a cross-linking point during combustion and greatly contributes to the formation of a carbonized film.

Examples of the phosphorus-based flame retardant (D) include organic phosphorus-based, red phosphorus-based, and inorganic phosphorus-based flame retardants. Examples of the organic phosphorus-based flame retardant include phosphine, phosphine oxide, biphosphine, phosphonium salt, phosphinate, phosphate, phosphite and the like. More specifically, triphenyl phosphate, methyl neopentyl phosphite, pentaerythritol diethyl diphosphite, methyl neopentyl phosphate, phenyl neopentyl phosphate,
Pentaerythritol diphenyl diphosphate, dicyclopentyl hypophosphate, dineopentyl hypophosphite, phenyl pyrocatechol phosphate, ethyl pyrocatechol phosphate, dipyrocatechol hypophosphate.

Here, as the organic phosphorus compound, an aromatic phosphate ester monomer and an aromatic phosphate ester condensate are particularly preferred. In the above (D), one of the phosphorus-based flame retardants, red phosphorus, is prepared by preliminarily selecting a surface of aluminum hydroxide, magnesium hydroxide, zinc hydroxide, or titanium hydroxide in addition to a general red phosphorus-based flame retardant. Coated with a metal hydroxide coating, coated with a coating composed of a metal hydroxide selected from aluminum hydroxide, magnesium hydroxide, zinc hydroxide, and titanium hydroxide, and a thermosetting resin , Aluminum hydroxide, magnesium hydroxide, zinc hydroxide, and titanium hydroxide, and a double coating of a thermosetting resin on a metal hydroxide.

In the above (D), one of the inorganic phosphorus-based flame retardants of the phosphorus-based flame retardant is ammonium polyphosphate, a composite flame retardant of the same with a nitrogen compound, or a phosphazene-based compound, particularly having an aromatic group. And a compound having a structure in which a phosphorus atom and a nitrogen atom are connected by a double bond, such as cyclic phosphazene or linear phosphazene. Among the phosphazenes, from the viewpoint of compatibility with the aromatic polycarbonate, the phosphazene contains an aromatic group such as a phenyl group, a cresyl group, a xylyl group, and a bisphenyl group as a substituent. Specifically, phenoxypropoxyphosphazene, diphenoxyphosphazene, phenoxyaminophosphazene,
Phenoxyfluoroalkylphosphazene and the like,
These phosphazene compounds are produced by replacing chlorophosphazene with alcohols or phenols.

The nitrogen-based flame retardant as (D) is typically a compound containing a triazine skeleton, and is a component for further improving the flame retardancy as a flame retardant aid of a phosphorus-based flame retardant. Specific examples thereof include melamine, melam, melem, melon (product of deammonification of three to three molecules of melem at 600 ° C. or higher), melamine cyanurate
G, melamine phosphate, succinoguanamine, adipoguanamine, methylglutalogamine, melamine resin, B
T resin can be used, but melamine cyanurate is particularly preferable from the viewpoint of low volatility.

The inorganic flame retardant (D) includes silica, aluminum hydroxide, magnesium hydroxide, dolomite, hydrotalcite, calcium hydroxide, barium hydroxide, basic magnesium carbonate, zirconium hydroxide, Hydrate of inorganic metal compounds such as hydrate of tin oxide, aluminum oxide, iron oxide, titanium oxide, manganese oxide, magnesium oxide, zirconium oxide, zinc oxide, molybdenum oxide, cobalt oxide, bismuth oxide,
Metal oxides such as chromium oxide, tin oxide, antimony oxide, nickel oxide, copper oxide, and tungsten oxide; aluminum, iron, titanium, manganese, zinc, molybdenum, cobalt, bismuth, chromium, nickel, copper, tungsten, tin, and antimony Metal powder, and zinc borate, etc.
Examples include zinc metaborate, barium metaborate, zinc carbonate, magnesium carbonate, calcium carbonate, barium carbonate and the like. These may be used alone or in combination of two or more. Among them, those selected from the group consisting of magnesium hydroxide, aluminum hydroxide, basic magnesium carbonate, and hydrotalcite have particularly good flame retardant effects and are economically advantageous.

In the present invention, (D) is preferably 0.001 to 100 parts by weight based on 100 parts by weight of (A),
More preferably 0.1 to 50 parts by weight, most preferably 1 to 50 parts by weight.
-20 parts by weight. In the present invention, if necessary,
One or more release agents or fluids selected from aliphatic hydrocarbons, higher fatty acids, higher fatty acid esters, higher fatty acid amides, higher fatty alcohols, metal soaps, organosiloxane waxes, polyolefin waxes, and polycaprolactone A processing aid as a performance improver can be blended.

The amount of the processing aid is preferably 0.01 to 20 parts by weight, more preferably 0.5 to 10 parts by weight, and most preferably 1 to 5 parts by weight, per 100 parts by weight of (A).
Parts by weight. In the present invention, when light resistance is required, as necessary, an ultraviolet absorber, a hindered amine light stabilizer, an antioxidant, an active species trapping agent, a light shielding agent, a metal deactivator, or a quencher. One or two or more light resistance improvers selected from agents can be blended.

The amount of the light fastness improver is preferably 0.05 to 20 parts by weight, more preferably 0.1 to 10 parts by weight, most preferably 1 to 5 parts by weight, per 100 parts by weight of (A).
Parts by weight. The thus obtained suitable polymer composition can be used to produce various molded articles by any molding method. Injection molding, extrusion molding, compression molding, blow molding, calender molding, foam molding and the like are preferably used.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto. In these examples and comparative examples, the test methods used for evaluating various physical properties are as follows. (1) Average diameter and aspect ratio of fiber The number average particle diameter of the fiber was determined by an electron microscope, while the average length of the fiber was determined by an optical microscope, and the aspect ratio was calculated from the length / diameter ratio. That is, the cross section of each fiber is assumed to be a circle, and the arithmetic average of the major axis and the minor axis is defined as the average diameter of each particle. Then, the number average particle diameter was determined by arithmetic mean of the average diameter of 100 particles. The average length of the fibers was also determined as the number average fiber length.

(2) Flame retardancy VB (Vertical Bur) conforming to UL-94
The self-extinguishing property was evaluated by the following criteria according to the following method. (1/8 inch thickness test piece) ◎ Self-extinguishing within less than 20 seconds ○ Self-extinguishing within 20 to 40 seconds △ Self-extinguishing within 40 seconds or more × Burnout

(3) Izod impact strength Measured by a method based on ASTM-D256 (23
° C, 1/4 inch thick test piece with V notch). (4) Extrusion stability (quality stability) The resin composition was continuously melt-extruded for 10 hours using a melt extruder, and the Izod impact strength of the composition obtained every hour was measured, and the average strength was measured. The continuous productivity (quality stability) was evaluated from the rate of change (%) with respect to. (5) Flexural modulus Measured at 23 ° C. by a method according to JIS K6758. The following components were used for each component used in Examples and Comparative Examples.

(A) Polymer Abbreviated in parentheses as follows. Bisphenol A type polycarbonate (PC), nylon 6 (PA6), polyethylene terephthalate (PET), rubber-modified polystyrene (HIPS), ABS resin (ABS), styrene-
Ethylene-butylene-styrene copolymer (SEBS),
Styrene-butadiene copolymer (SB), polyphenylene ether (PPE), polypropylene (PP), ethylene-octene copolymer (EO), crosslinked EO-PP (TPV) where TPV is EO / PP = 50 / 50 (weight ratio)
A thermoplastic polypropylene dynamically crosslinked by a twin screw extruder using an organic peroxide and triallyl isocyanurate.

(B) Silicon-based compound: polyorganosiloxane A known technique, for example, Chapter 17 of "Silicone Handbook" [edited by Kunio Ito (Nikkan Kogyo Shimbun) (1990)]
According to the silicone production method, silicones differing in the amount ratio of D-type and T-type and the amount ratio of methyl group and phenyl group were manufactured. (C) Fiber Glass fiber (GF): In producing silica glass by melt-spinning, the average fiber diameter was controlled by the size of the spout, and the aspect ratio (length / diameter) was controlled by the cutting speed. (D) Flame retardant 1) Organic sulfonate: potassium perfluorobutane-sulfonate (referred to as SF) 2) Polytetrafluoroethylene: manufactured by Daikin Industries, Ltd. (referred to as PTFE)

[0046]

Examples 1 to 27 and Comparative Examples 1 to 5 The compositions shown in Tables 1 to 4 were mixed in a Henschel mixer, and subsequently, a twin screw extruder (40 mmφ, L
/ D = 47), and continuous melt extrusion was performed at 240 ° C. for 10 hours. As the screw, a double screw having a kneading portion before and after the injection port was used. From the composition thus obtained, a cylinder set temperature of 250
A molded article was prepared by injection molding at 80 ° C. and a mold temperature of 80 ° C. and evaluated. The results are shown in Tables 1 to 4.

[0047]

[Table 1]

[0048]

[Table 2]

[0049]

[Table 3]

[0050]

[Table 4]

[0051]

Industrial Applicability The fiber-reinforced flame-retardant polymer composition of the present invention is excellent in mechanical strength such as excellent impact strength and rigidity and extrusion stability. The composition of the present invention comprises a VTR, a distribution board,
Home appliances housing, chassis or parts such as TV, audio player, condenser, household outlet, radio cassette, video cassette, video disk player, air conditioner, humidifier, electric hot air machine, CD-
ROM main frame (mechanical chassis), printer, fax, PPC, CRT, word processor copier, electronic cash register, office computer system, floppy disk drive, key Board,
OA equipment housing such as type, ECR, calculator, toner cartridge, telephone, chassis or parts, connector,
Coil bobbin, switch, relay, relay socket, L
Electronic and electrical materials such as ED, variable condenser, AC adapter, FBT high pressure bobbin, FBT case, IFT coil bobbin, jack, volume shaft, motor parts, etc.
And instrument panels, radiator grills, clusters, speaker grills, lovers, console boxes, defroster garnishes, ornaments, fuse boxes, relay boxes, etc. It is suitable for automotive materials such as wire and connector shift tape, and plays a large role in these industries.

Claims (3)

[Claims] 1. A polymer, (B) a silicon compound, and (C) an average fiber diameter of 0.01 to 1,000 μm, and an aspect ratio (length / diameter) of 2 to 10,000. A fiber-reinforced flame-retardant polymer composition comprising: 2. The fiber-reinforced flame-retardant polymer composition according to claim 1, wherein the polymer (A) is an aromatic thermoplastic polymer. 3. The fiber-reinforced flame-retardant polymer composition according to claim 1, wherein (B) the silicon compound is an organic silicon compound.