JP2007154093A - Resin composition for frame for fixing flat panel display and frame for fixing flat panel display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin material suitable for use in a frame for fixing a flat panel display, a frame for fixing an FPD made of the resin, a resin material which does not contain a chlorine- or a bromine-based flame retardant, is not liable for warping, has a smooth surface and suitably used for a frame for fixing an FPD, and the frame for fixing an FPD. <P>SOLUTION: The resin composition comprises 40-99 wt.% of an aromatic polycarbonate resin and a flat-cross sectional glass fiber having an average length of the major axis of the cross section of 10-50 μm and an average ratio of the major axis to the minor axis (major axis / minor axis) of 1.5-8 and used for a frame for fixing an FDP. Preferably it contains a fluorine-containing anti-melt drip agent and a flame retardant. Particularly, the resin composition is suitable for use in FPD-fixing frames the sizes of which are 200-800 mm in the short side and 300-1,300 mm in the long side. Further, it is most suitable for the frames, particularly the frames for fixing LCD's with a thickness of the inner edges of the frames for mounting FPD's of 0.3-1 mm. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a resin composition for a flat panel display fixing frame. More specifically, a resin composition for a flat panel display fixing frame having good flame retardancy without blending a compound having a chemical bond of chlorine atom or bromine atom, excellent rigidity and low warpage, and excellent weld strength Related to things.

  A flat panel display (hereinafter sometimes referred to simply as “FPD”) utilizes features such as thinness, light weight, and low power consumption, and is equipped with a TV, a digital still camera, a video camera, a personal computer, a mobile phone, a pachinko machine, and a car navigation device. It is used in a wide range of fields. The FPD usually requires a frame for fixing such a display component to the apparatus. In particular, such a frame is usually used in a liquid crystal display (hereinafter, abbreviated as LCD). Such a frame is referred to as a flat panel display fixing frame (FPD fixing frame) in the present invention. Further, such a fixed frame is required to have a certain degree of high rigidity and low warpage, and often requires a higher weld strength.

  Conventionally, a material in which a flaky inorganic filler and, if necessary, a fibrous filler are blended with a polycarbonate resin as a material for a fixed frame of an LCD is known (see Patent Document 1). Further, a material in which glass flakes, an antistatic agent, and a dispersant for an antistatic agent are blended with polycarbonate resin as a material for a fixed frame of an LCD is also known (see Patent Document 2). These materials satisfy high rigidity and low warpage mainly by using glass flakes. However, neither of Patent Documents 1 and 2 fully discloses an invention that solves the above-described requirements regarding weld strength.

Furthermore, Patent Documents 1 and 2 do not fully consider flame retardancy, or only disclose the formulation of brominated flame retardants. Good flame retardancy is required for the FPD fixing frame. Further, in recent years, manufacturers have tended to avoid chlorinated and brominated flame retardants in consideration of the environmental impact of products, and FPD fixing frames are required to satisfy these requirements.
In addition, the FPD fixing frame is more preferably required to have surface smoothness (good appearance).

  On the other hand, an aromatic polycarbonate resin composition with improved fluidity comprising an aromatic polycarbonate resin, a fiber filler, and an organic phosphate is known (see Patent Document 3). However, such a resin composition has a problem that the anisotropy of the molding shrinkage rate is large and the warp tends to be warped. A polycarbonate resin composition having an improved warping property comprising an aromatic polycarbonate resin, a specific non-circular fiber, and a plate-like filler is known (see Patent Document 4). However, such a resin composition does not sufficiently disclose an invention that solves the above-mentioned demand for weld strength.

A resin composition comprising a polycarbonate resin and a glass fiber having a cross-sectional shape of eyebrows is known (see Patent Document 5).
However, this publication cannot be said to fully disclose a solution to the technical problem related to the FPD fixing frame.

JP-A-8-152608 JP 2003-226805 A Japanese Patent Laid-Open No. 7-3140 JP-A-6-207089 JP-A-8-20694

  As described above, in order to increase the rigidity of the FPD fixing frame and improve the weld strength, it is necessary to add a fibrous filler. However, the fibrous filler has a large anisotropy of the molding shrinkage rate of the fixed frame, has an adverse effect on the appearance, and is a factor that impairs the warpage and surface smoothness of the FPD product. Accordingly, an object of the present invention is to provide a resin material that is highly rigid by blending such a filler, and that is optimal for an FPD fixing frame that does not adversely affect the warpage and surface smoothness of the FPD, and An object of the present invention is to provide an FPD fixing frame made of the resin material. In addition, an object of the present invention is to provide an FPD fixing frame made of a resin material having good flame retardancy without blending a chlorine-based or bromine-based flame retardant.

  As a result of intensive studies to solve such problems, the present inventors have found that a polycarbonate resin composition containing a flat cross-sectional glass fiber that has not been sufficiently studied in the prior art is a resin material that solves the above problems. As a result, the present invention was completed.

  According to the present invention, the above-mentioned problems of the present invention are: (1) 40 to 99% by weight of a thermoplastic resin (component A) made of an aromatic polycarbonate resin (component A-1) and an average value of the major axis of the fiber cross section is 10; Polycarbonate resin consisting of 1 to 60% by weight of a reinforcing filler made of flat cross-section glass fibers (component B-1) having an average value of the major axis to minor axis ratio (major axis / minor axis) of 1.5 to 8 It is a composition, Comprising: This resin composition is achieved by the resin composition for flat panel display fixing frames (structure 1) characterized by being used for a flat panel display fixing frame.

  That is, according to the configuration (1), the FPD fixing frame is excellent in good flame retardancy, heat resistance and rigidity, in addition, excellent in weld strength, which is a problem during FPD manufacture, and in excellent surface smoothness. A resin composition is provided.

  In the present invention, examples of the flat panel display include an LCD, a plasma display, an inorganic EL display, an organic EL display, and a field emission display. Among these, the LCD is more effective for the composition of the present invention.

  One of the preferred embodiments of the present invention is as follows. (2) The resin composition for a flat panel display fixing frame according to the configuration (1), wherein the thermoplastic resin contains a styrene resin (component A-2). ).

  One of the preferred embodiments of the present invention comprises (3) 0.01 to 0.6 parts by weight of a fluorine-containing anti-dripping agent (component C) with respect to a total of 100 parts by weight of component A and component B. It is the resin composition for flat panel display fixed frames as described in any one of said structure (1)-(2) (structure 3). By further blending such a fluorine-containing anti-drip agent (component C), better flame retardancy is achieved.

  One of the preferred embodiments of the present invention is the above-mentioned constitution (1) comprising (4) 0.01 to 20 parts by weight of a flame retardant (D component) with respect to 100 parts by weight of the total of A component and B component. -(3) It is the resin composition for flat panel display fixed frames in any one (structure 4). As described above, the resin composition of the present invention achieves improved flame retardancy even when only the fluorine-containing anti-dripping agent (component C) is blended. However, blending of a flame retardant is preferred in order to achieve better flame retardancy after increasing the degree of freedom of the amount of component B. A known flame retardant can be used as the flame retardant. However, as described above, it is preferable that the preferred embodiment of the present invention does not use a chlorine-based or bromine-based flame retardant which is a compound in which a chlorine atom and a bromine atom are chemically bonded.

  One of the preferred embodiments of the present invention is (5) a thickness where the combustion rank of the test piece is V-0 between 0.8 to 1.6 mm thickness in the vertical combustion test of UL standard 94, And a resin composition for a flat panel display fixing frame according to any one of the above constitutions (1) to (4), wherein a compound in which a chlorine atom and a bromine atom are chemically bonded is not blended. is there. According to the configuration (5), an FPD fixing frame that does not exist in the related art, in which the above-described problems are solved, is provided.

  One of the preferred embodiments of the present invention is as follows. (6) The polycarbonate resin composition comprises 0 to 50 parts by weight of a plate-like inorganic filler (E-1 component with respect to 100 parts by weight in total of the component A and the component B). ) And at least one reinforcing filler (E component) selected from fibrous inorganic fillers (E-2 component), and the flat panel display fixing frame according to any one of the above constitutions (1) to (5) Resin composition. According to the configuration (6), an FPD fixing frame having a smaller warp property is provided.

  One of the preferred embodiments of the present invention is (7) a flat panel display fixing frame formed from the resin composition according to any one of the above configurations (1) to (6), particularly a short side of 200 to 800 mm, A flat panel display fixing frame (Configuration 7) having a long side in a range of 300 to 1300 mm. According to the present invention, such a large FPD fixing frame having high weld strength is provided.

Another aspect of the present invention is (8) a method for producing a flat panel display fixing frame, wherein (i) a thermoplastic resin (component A) made of an aromatic polycarbonate-based resin is 40 to 99% by weight and the fiber cross section It consists of 1 to 60% by weight of a flat cross-section glass fiber (component B) having an average value of 5 to 30 μm and an average value of the ratio of the major axis to the minor axis of 1.5 to 8, and in the vertical combustion test of UL standard 94 A polycarbonate characterized in that there is a thickness where the combustion rank of the test piece is V-0 between 0.8 and 1.6 mm thickness, and a compound in which chlorine atoms and bromine atoms are chemically bonded is not blended. A step of preparing a pellet made of the resin composition (step-i),
(Ii) a step of injecting and filling the pellet into a mold cavity (step-ii), and (iii) a step of taking out a flat panel display fixing frame from the mold cavity (step-iii). It is a manufacturing method (structure 8) of a flat panel display fixed frame.

As a more preferred embodiment, (9) in the step-i, the polycarbonate resin composition further contains no phosphate compound as a flame retardant. A manufacturing method is provided.
The more suitable aspect of the polycarbonate resin composition in this manufacturing method (8) and (9) is the same as that of the said structures (1)-(6).

Hereinafter, the details of the present invention will be described.
(Component A: thermoplastic resin)
(Aromatic polycarbonate resin)
The aromatic polycarbonate resin used as the A component thermoplastic resin in the present invention is obtained by reacting a dihydric phenol and a carbonate precursor. Examples of the reaction method include an interfacial polymerization method, a melt transesterification method, a solid phase transesterification method of a carbonate prepolymer, and a ring-opening polymerization method of a cyclic carbonate compound.

  Representative examples of the dihydric phenol used here include hydroquinone, resorcinol, 4,4′-biphenol, 1,1-bis (4-hydroxyphenyl) ethane, and 2,2-bis (4-hydroxyphenyl). ) Propane (commonly called bisphenol A), 2,2-bis (4-hydroxy-3-methylphenyl) propane, 2,2-bis (4-hydroxyphenyl) butane, 1,1-bis (4-hydroxyphenyl)- 1-phenylethane, 1,1-bis (4-hydroxyphenyl) cyclohexane, 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane, 2,2-bis (4-hydroxyphenyl) Pentane, 4,4 ′-(p-phenylenediisopropylidene) diphenol, 4,4 ′-(m-phenylenediisopropyl Pyridene) diphenol, 1,1-bis (4-hydroxyphenyl) -4-isopropylcyclohexane, bis (4-hydroxyphenyl) oxide, bis (4-hydroxyphenyl) sulfide, bis (4-hydroxyphenyl) sulfoxide, bis (4-hydroxyphenyl) sulfone, bis (4-hydroxyphenyl) ketone, bis (4-hydroxyphenyl) ester, bis (4-hydroxy-3-methylphenyl) sulfide, 9,9-bis (4-hydroxyphenyl) Examples include fluorene and 9,9-bis (4-hydroxy-3-methylphenyl) fluorene. A preferred dihydric phenol is bis (4-hydroxyphenyl) alkane, and bisphenol A is particularly preferred from the viewpoint of impact resistance, and is widely used.

In the present invention, in addition to bisphenol A-based polycarbonate, which is a general-purpose polycarbonate, it is possible to use a special polycarbonate produced using other dihydric phenols as the A component.
For example, as part or all of the dihydric phenol component, 4,4 ′-(m-phenylenediisopropylidene) diphenol (hereinafter sometimes abbreviated as “BPM”), 1,1-bis (4-hydroxy) Phenyl) cyclohexane, 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane (hereinafter sometimes abbreviated as “Bis-TMC”), 9,9-bis (4-hydroxyphenyl) Polycarbonate (homopolymer or copolymer) using fluorene and 9,9-bis (4-hydroxy-3-methylphenyl) fluorene (hereinafter sometimes abbreviated as “BCF”) has dimensions due to water absorption. It is suitable for applications where the demands for change and shape stability are particularly severe. These dihydric phenols other than BPA are preferably used in an amount of 5 mol% or more, particularly 10 mol% or more of the entire dihydric phenol component constituting the polycarbonate.

In particular, when high rigidity and better hydrolysis resistance are required, it is particularly preferable that the component A constituting the resin composition is a copolymerized polycarbonate of the following (1) to (3). is there.
(1) BPM is 20 to 80 mol% (more preferably 40 to 75 mol%, more preferably 45 to 65 mol%) in 100 mol% of the dihydric phenol component constituting the polycarbonate, and BCF Of 20 to 80 mol% (more preferably 25 to 60 mol%, more preferably 35 to 55 mol%).
(2) BPA is 10 to 95 mol% (more preferably 50 to 90 mol%, more preferably 60 to 85 mol%) in 100 mol% of the dihydric phenol component constituting the polycarbonate, and BCF Is 5 to 90 mol% (more preferably 10 to 50 mol%, more preferably 15 to 40 mol%).
(3) BPM is 20 to 80 mol% (more preferably 40 to 75 mol%, more preferably 45 to 65 mol%) in 100 mol% of the dihydric phenol component constituting the polycarbonate, and Bis -Copolymer polycarbonate in which TMC is 20 to 80 mol% (more preferably 25 to 60 mol%, still more preferably 35 to 55 mol%).

These special polycarbonates may be used alone or in combination of two or more. Moreover, these can also be mixed and used for the bisphenol A type polycarbonate generally used.
The production method and characteristics of these special polycarbonates are described in detail in, for example, JP-A-6-172508, JP-A-8-27370, JP-A-2001-55435, and JP-A-2002-117580. ing.

Of the various polycarbonates described above, those having a water absorption and Tg (glass transition temperature) adjusted within the following ranges by adjusting the copolymer composition, etc. have good hydrolysis resistance of the polymer itself, and Since it is remarkably excellent in low warpage after molding, it is particularly suitable in a field where form stability is required.
(I) polycarbonate having a water absorption of 0.05 to 0.15%, preferably 0.06 to 0.13% and Tg of 120 to 180 ° C, or (ii) Tg of 160 to 250 ° C, Polycarbonate which is preferably 170 to 230 ° C. and has a water absorption of 0.10 to 0.30%, preferably 0.13 to 0.30%, more preferably 0.14 to 0.27%.

  Here, the water absorption of the polycarbonate is a value obtained by measuring the moisture content after being immersed in water at 23 ° C. for 24 hours in accordance with ISO 62-1980 using a disc-shaped test piece having a diameter of 45 mm and a thickness of 3.0 mm. is there. Moreover, Tg (glass transition temperature) is a value calculated | required by the differential scanning calorimeter (DSC) measurement based on JISK7121.

  As the carbonate precursor, carbonyl halide, carbonic acid diester, haloformate or the like is used, and specific examples include phosgene, diphenyl carbonate, dihaloformate of dihydric phenol, and the like.

  In producing the aromatic polycarbonate resin by the interfacial polymerization method using the dihydric phenol and the carbonate precursor, a catalyst, a terminal terminator, and an antioxidant for preventing the dihydric phenol from being oxidized as necessary. Etc. may be used. The aromatic polycarbonate resin of the present invention is a branched polycarbonate resin copolymerized with a trifunctional or higher polyfunctional aromatic compound, a polyester copolymerized with an aromatic or aliphatic (including alicyclic) difunctional carboxylic acid. Carbonate resin, copolymer polycarbonate resin copolymerized with bifunctional alcohol (including alicyclic), and polyester carbonate resin copolymerized with such bifunctional carboxylic acid and bifunctional alcohol are included. Moreover, the mixture which mixed 2 or more types of the obtained aromatic polycarbonate resin may be sufficient.

  The branched polycarbonate resin can impart anti-drip performance and the like to the reinforced aromatic polycarbonate resin composition of the present invention. Examples of the trifunctional or higher polyfunctional aromatic compound used in the branched polycarbonate resin include phloroglucin, phloroglucid, or 4,6-dimethyl-2,4,6-tris (4-hydroxydiphenyl) heptene-2, 2 , 4,6-trimethyl-2,4,6-tris (4-hydroxyphenyl) heptane, 1,3,5-tris (4-hydroxyphenyl) benzene, 1,1,1-tris (4-hydroxyphenyl) Ethane, 1,1,1-tris (3,5-dimethyl-4-hydroxyphenyl) ethane, 2,6-bis (2-hydroxy-5-methylbenzyl) -4-methylphenol, 4- {4- [ Trisphenol such as 1,1-bis (4-hydroxyphenyl) ethyl] benzene} -α, α-dimethylbenzylphenol, tetra (4-hydride) Loxyphenyl) methane, bis (2,4-dihydroxyphenyl) ketone, 1,4-bis (4,4-dihydroxytriphenylmethyl) benzene, or trimellitic acid, pyromellitic acid, benzophenonetetracarboxylic acid and their acids Among them, 1,1,1-tris (4-hydroxyphenyl) ethane and 1,1,1-tris (3,5-dimethyl-4-hydroxyphenyl) ethane are preferable. 1-Tris (4-hydroxyphenyl) ethane is preferred.

  The structural unit derived from the polyfunctional aromatic compound in the branched polycarbonate is 0.1% in a total of 100 mol% of the structural unit derived from the dihydric phenol and the structural unit derived from the polyfunctional aromatic compound. It is 01 to 1 mol%, preferably 0.05 to 0.9 mol%, particularly preferably 0.05 to 0.8 mol%.

In particular, in the case of the melt transesterification method, a branched structural unit may be generated as a side reaction. However, the amount of the branched structural unit is also 0.1% in a total of 100 mol% with a structural unit derived from a dihydric phenol. Those having a ratio of 001 to 1 mol%, preferably 0.005 to 0.9 mol%, particularly preferably 0.01 to 0.8 mol% are preferred. The ratio of the branched structure can be calculated by ¹ H-NMR measurement.

The aliphatic bifunctional carboxylic acid is preferably α, ω-dicarboxylic acid. Examples of the aliphatic difunctional carboxylic acid include sebacic acid (decanedioic acid), dodecanedioic acid, tetradecanedioic acid, octadecanedioic acid, icosanedioic acid and other straight-chain saturated aliphatic dicarboxylic acids, and cyclohexanedicarboxylic acid. Preferred are alicyclic dicarboxylic acids such as As the bifunctional alcohol, an alicyclic diol is more preferable, and examples thereof include cyclohexanedimethanol, cyclohexanediol, and tricyclodecane dimethanol.
Further, a polycarbonate-polyorganosiloxane copolymer obtained by copolymerizing polyorganosiloxane units can also be used.

  The reaction forms such as interfacial polymerization, melt transesterification, solid phase transesterification of carbonate prepolymer, and ring-opening polymerization of cyclic carbonate compounds, which are methods for producing the polycarbonate resin of the present invention, are various documents and patent publications. This is a well-known method.

In producing the glass fiber reinforced flame retardant resin composition of the present invention, the viscosity average molecular weight (M) of the aromatic polycarbonate resin is not particularly limited, but is preferably 10,000 to 50,000, more preferably. It is 14,000-30,000, More preferably, it is 14,000-24,000.
With an aromatic polycarbonate resin having a viscosity average molecular weight of less than 10,000, good mechanical properties cannot be obtained. On the other hand, a resin composition obtained from an aromatic polycarbonate resin having a viscosity average molecular weight exceeding 50,000 is inferior in versatility in that it is inferior in fluidity during injection molding.

  The aromatic polycarbonate resin may be obtained by mixing those having a viscosity average molecular weight outside the above range. In particular, an aromatic polycarbonate resin having a viscosity average molecular weight exceeding the range (50,000) improves the entropy elasticity of the resin. As a result, good moldability is exhibited in gas assist molding and foam molding which may be used when molding a reinforced resin material into a structural member. Such improvement in moldability is even better than that of the branched polycarbonate. As a more preferred embodiment, the A component is an aromatic polycarbonate resin having a viscosity average molecular weight of 70,000 to 300,000 (component A-1-1), and an aromatic polycarbonate resin having a viscosity average molecular weight of 10,000 to 30,000. An aromatic polycarbonate resin (A-1 component) (hereinafter referred to as “high molecular weight component-containing aromatic polycarbonate resin”) having a viscosity average molecular weight of 16,000 to 35,000. May also be used.

  In such a high molecular weight component-containing aromatic polycarbonate resin (A-1 component), the molecular weight of the A-1-1 component is preferably 70,000 to 200,000, more preferably 80,000 to 200,000, still more preferably. 100,000 to 200,000, particularly preferably 100,000 to 160,000. The molecular weight of the A-1-2 component is preferably 10,000 to 25,000, more preferably 11,000 to 24,000, still more preferably 12,000 to 24,000, and particularly preferably 12,000 to 23. , 000.

  The high molecular weight component-containing aromatic polycarbonate resin (component A-1) is obtained by mixing the components A-1-1 and A-1-2 at various ratios and adjusting them so as to satisfy a predetermined molecular weight range. Can do. Preferably, in 100% by weight of the A-1 component, the A-1-1 component is 2 to 40% by weight, more preferably the A-1-1 component is 3 to 30% by weight, and still more preferably The A-1-1 component is 4 to 20% by weight, and particularly preferably the A-1-1 component is 5 to 20% by weight.

  As the preparation method of the component A-1, (1) a method in which the components A-1-1 and A-1-2 are independently polymerized and mixed, and (2) JP-A-5-306336. The method of producing an aromatic polycarbonate resin showing a plurality of polymer peaks in a molecular weight distribution chart by GPC method, represented by the method shown in Japanese Patent Publication No. Gazette, in the same system, the aromatic polycarbonate resin of the present invention A- A method of producing so as to satisfy the conditions of one component, and (3) an aromatic polycarbonate resin obtained by the production method (production method of (2)), a separately produced A-1-1 component and / or Examples thereof include a method of mixing the A-1-2 component.

The viscosity average molecular weight referred to in the present invention is first determined by using an Ostwald viscometer from a solution obtained by dissolving 0.7 g of aromatic polycarbonate in 100 ml of methylene chloride at 20 ° C. with a specific viscosity (η _SP ) calculated by the following formula. ,
Specific viscosity (η _SP ) = (t−t ₀ ) / t ₀
[T ₀ is methylene chloride falling seconds, t is sample solution falling seconds]
The viscosity average molecular weight M is calculated from the determined specific viscosity (η _SP ) by the following formula.
η _SP /c=[η]+0.45×[η] ² c (where [η] is the intrinsic viscosity)
[Η] = 1.23 × 10 ⁻⁴ M ^0.83
c = 0.7

  In addition, calculation of the viscosity average molecular weight of the aromatic polycarbonate resin in the glass fiber reinforced flame retardant resin composition of the present invention is performed as follows. That is, the composition is mixed with 20 to 30 times its weight of methylene chloride to dissolve the soluble component in the composition. Such soluble matter is collected by Celite filtration. Thereafter, the solvent in the obtained solution is removed. The solid after removal of the solvent is sufficiently dried to obtain a solid component that dissolves in methylene chloride. A specific viscosity at 20 ° C. is determined from a solution obtained by dissolving 0.7 g of the solid in 100 ml of methylene chloride in the same manner as described above, and the viscosity average molecular weight M is calculated from the specific viscosity in the same manner as described above.

(Styrene resin)
The styrenic resin used in the thermoplastic resin of component A of the present invention has good molding processability, moderate heat resistance and flame retardancy, and is therefore preferable for maintaining a balance between these properties. Resin.
Such a styrenic resin is a copolymer or copolymer of an aromatic vinyl compound, and, if necessary, at least one selected from other vinyl monomers and rubbery polymers copolymerizable therewith. It is a polymer obtained by polymerization.

  As the aromatic vinyl compound, styrene is particularly preferable. Preferable examples of the other vinyl monomer copolymerizable with the aromatic vinyl compound include a vinyl cyanide compound and a (meth) acrylic acid ester compound. A particularly preferred vinyl cyanide compound is acrylonitrile, and a particularly preferred (meth) acrylic acid ester compound is methyl methacrylate.

  Other vinyl monomers copolymerizable with aromatic vinyl compounds other than vinyl cyanide compounds and (meth) acrylic acid ester compounds include epoxy group-containing methacrylic acid esters such as glycidyl methacrylate, maleimide, N-methylmaleimide, Examples thereof include maleimide monomers such as N-phenylmaleimide, α, β-unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, phthalic acid and itaconic acid, and anhydrides thereof.

  Examples of the rubbery polymer copolymerizable with the aromatic vinyl compound include polybutadiene, polyisoprene, and diene copolymers (eg, styrene / butadiene random copolymers and block copolymers, acrylonitrile / butadiene copolymers). , And (meth) acrylic acid alkyl ester and butadiene copolymers), ethylene and α-olefin copolymers (eg, ethylene / propylene random copolymers and block copolymers, ethylene / butene random copolymers). Polymers and block copolymers), copolymers of ethylene and unsaturated carboxylic acid esters (for example, ethylene / methacrylate copolymers and ethylene / butyl acrylate copolymers), copolymers of ethylene and aliphatic vinyl. Polymer (for example, ethylene / vinyl acetate copolymer) ), Ethylene, propylene and non-conjugated diene terpolymers (eg, ethylene / propylene / hexadiene copolymer), acrylic rubbers (eg, polybutyl acrylate, poly (2-ethylhexyl acrylate), and butyl acrylate 2 A copolymer with ethylhexyl acrylate, etc.), and a silicone rubber (for example, polyorganosiloxane rubber, IPN type rubber comprising a polyorganosiloxane rubber component and a polyalkyl (meth) acrylate rubber component; that is, two rubber components And rubbers having a structure in which they are entangled with each other so that they cannot be separated, and an IPN type rubber composed of a polyorganosiloxane rubber component and a polyisobutylene rubber component.

  Specific examples of the styrene resin include styrene resins such as polystyrene resin, HIPS resin, MS resin, ABS resin, AS resin, AES resin, ASA resin, MBS resin, MABS resin, MAS resin, and SMA resin. And (hydrogenated) styrene-butadiene-styrene copolymer resin, (hydrogenated) styrene-isoprene-styrene copolymer resin, and the like. In addition, the notation of (hydrogenated) means that both non-hydrogenated resin and hydrogenated resin are included. Here, the MS resin is a copolymer resin mainly composed of methyl methacrylate and styrene, the AES resin is a copolymer resin mainly composed of acrylonitrile, ethylene-propylene rubber, and styrene, and the ASA resin is mainly composed of acrylonitrile, styrene, and acrylic rubber. MABS resin is a copolymer resin mainly composed of methyl methacrylate, acrylonitrile, butadiene and styrene, MAS resin is a copolymer resin mainly composed of methyl methacrylate, acrylic rubber and styrene, and SMA resin is styrene and A copolymer resin mainly composed of maleic anhydride (MA) is shown.

Such a styrenic resin may have a high stereoregularity such as syndiotactic polystyrene by using a catalyst such as a metallocene catalyst during the production thereof. Further, in some cases, polymers and copolymers having a narrow molecular weight distribution, block copolymers, and polymers and copolymers having high stereoregularity obtained by methods such as anion living polymerization and radical living polymerization are used. It is also possible.
Among these, acrylonitrile / styrene copolymer resin (AS resin) and acrylonitrile / butadiene / styrene copolymer resin (ABS resin) are preferable. It is also possible to use a mixture of two or more styrenic polymers.

  The AS resin used in the present invention is a thermoplastic copolymer obtained by copolymerizing a vinyl cyanide compound and an aromatic vinyl compound. As such a vinyl cyanide compound, acrylonitrile can be particularly preferably used. As the aromatic vinyl compound, styrene and α-methylstyrene can be preferably used. The proportion of each component in the AS resin is 5 to 50% by weight, preferably 15 to 35% by weight of vinyl cyanide compound, 95 to 50% by weight of aromatic vinyl compound, when the total is 100% by weight. Preferably it is 85 to 65% by weight. Further, these vinyl compounds may be used in combination with other copolymerizable vinyl compounds described above, and the content ratio thereof is preferably 15% by weight or less in the AS resin component. Moreover, conventionally well-known various things can be used for the initiator, chain transfer agent, etc. which are used by reaction as needed.

Such an AS resin may be produced by any of bulk polymerization, suspension polymerization, and emulsion polymerization, but is preferably bulk polymerization. The copolymerization method may be either one-stage copolymerization or multistage copolymerization. The AS resin has a reduced viscosity of 0.2 to 1.0 dl / g, preferably 0.3 to 0.5 dl / g. The reduced viscosity is a value obtained by precisely weighing 0.25 g of AS resin and measuring a solution obtained by dissolving in 50 ml of dimethylformamide over 2 hours in an environment of 30 ° C. using an Ubbelohde viscometer. A viscometer having a solvent flow time of 20 to 100 seconds is used. The reduced viscosity is determined from the following formula from the solvent flow down seconds (t ₀ ) and the solution flow down seconds (t).
Reduced viscosity (η _sp / C) = {(t / t ₀ ) −1} /0.5
When the reduced viscosity is less than 0.2 dl / g, the impact is lowered, and when it exceeds 1.0 dl / g, the fluidity is deteriorated.

  The ABS resin used in the present invention is a mixture of a thermoplastic graft copolymer obtained by graft polymerization of a vinyl cyanide compound and an aromatic vinyl compound to a diene rubber component, and a copolymer of a vinyl cyanide compound and an aromatic vinyl compound. It is. As the diene rubber component forming this ABS resin, for example, rubber having a glass transition temperature of −30 ° C. or lower such as polybutadiene, polyisoprene and styrene-butadiene copolymer is used, and the proportion thereof is 100% by weight of the ABS resin component. The content is preferably 5 to 80% by weight, more preferably 8 to 50% by weight, and particularly preferably 10 to 30% by weight. As the vinyl cyanide compound grafted on the diene rubber component, acrylonitrile is particularly preferably used. As the aromatic vinyl compound grafted on the diene rubber component, styrene and α-methylstyrene are particularly preferably used. The ratio of the component grafted to the diene rubber component is preferably 95 to 20% by weight, particularly preferably 50 to 90% by weight, based on 100% by weight of the ABS resin component. Furthermore, it is preferable that the vinyl cyanide compound is 5 to 50% by weight and the aromatic vinyl compound is 95 to 50% by weight with respect to 100% by weight of the total amount of the vinyl cyanide compound and the aromatic vinyl compound. Further, methyl (meth) acrylate, ethyl acrylate, maleic anhydride, N-substituted maleimide and the like can be mixed and used for a part of the components grafted to the diene rubber component, and the content ratio thereof is in the ABS resin component. What is 15 weight% or less is preferable. Furthermore, conventionally known various initiators, chain transfer agents, emulsifiers and the like can be used as necessary.

  In the ABS resin of the present invention, the rubber particle diameter is preferably 0.1 to 5.0 μm, more preferably 0.15 to 1.5 μm, and particularly preferably 0.2 to 0.8 μm. As the distribution of the rubber particle diameter, either a single distribution or a rubber particle having two or more peaks can be used, and the rubber particles form a single phase in the morphology. Alternatively, it may have a salami structure by containing an occluded phase around the rubber particles.

In addition, it is well known that the ABS resin contains a vinyl cyanide compound and an aromatic vinyl compound that are not grafted to the diene rubber component, and the ABS resin of the present invention is free of the occurrence of such polymerization. The polymer component may be contained. The reduced viscosity of the copolymer comprising such free vinyl cyanide compound and aromatic vinyl compound is preferably 0.2 to 1.0 dl / g, more preferably reduced viscosity (30 ° C.) determined by the method described above. 0.3 to 0.7 dl / g.
The ratio of the grafted vinyl cyanide compound and aromatic vinyl compound is preferably 20 to 200%, more preferably 20 to 70% in terms of graft ratio (% by weight) with respect to the diene rubber component. is there.

  Such an ABS resin may be produced by any of bulk polymerization, suspension polymerization, and emulsion polymerization, but is preferably bulk polymerization. Further, as such bulk polymerization method, typically, the continuous bulk polymerization method (so-called Toray method) described in Chemical Engineering, Vol. 48, No. 6, page 415 (1984), and Chemical Engineering, Vol. 53, No. 6, page 423 (1989). ) Is a continuous bulk polymerization method (so-called Mitsui Toatsu method). Any ABS resin is preferably used as the ABS resin of the present invention. Further, the copolymerization may be carried out in one step or in multiple steps. Moreover, what blended the vinyl compound polymer obtained by copolymerizing an aromatic vinyl compound and a vinyl cyanide component separately to the ABS resin obtained by this manufacturing method can also be used preferably.

As the AS resin and the ABS resin, those having a reduced amount of alkali (earth) metal are more preferable from the viewpoint of good thermal stability and hydrolysis resistance. The amount of alkali (earth) metal in the styrenic resin is preferably less than 100 ppm, more preferably less than 80 ppm, still more preferably less than 50 ppm, and particularly preferably less than 10 ppm. Also from this point, AS resin and ABS resin by a bulk polymerization method are preferably used. Furthermore, in relation to such good thermal stability and hydrolysis resistance, when an emulsifier is used in the AS resin and ABS resin, the emulsifier is preferably a sulfonate salt, more preferably an alkyl sulfonic acid. It is salt. When a coagulant is used, the coagulant is preferably sulfuric acid or an alkaline earth metal salt of sulfuric acid.
The blending amount of the styrenic resin is 1 to 100 parts by weight, preferably 5 to 80 parts by weight, more preferably 10 to 70 parts by weight per 100 parts by weight of the component A-1.

(B component: reinforcing filler)
(Flat cross-section glass fiber)
The glass fiber used as B component of this invention is a flat cross-section glass fiber. The flat cross-section glass fiber of the present invention has an average value of the major axis of the fiber cross section of 10 to 50 μm, preferably 15 to 40 μm, more preferably 20 to 35 μm, and an average ratio of major axis to minor axis (major axis / minor axis). The glass fiber has a value of 1.5 to 8, preferably 2 to 6, more preferably 2.5 to 5. When using flat cross-section glass fibers with an average ratio of major axis to minor axis within this range, anisotropy is greatly improved compared to using non-circular cross-section fibers of less than 1.5, and flame retardancy is also achieved. Can be greatly improved. This improvement in flame retardancy is achieved by aligning the long side surface of the flat cross-section glass fiber parallel to the surface of the molded product on the surface of the molded product. It is considered that the blocking effect works more effectively than the circular cross-section fiber. In addition to the flat shape, the flat cross-sectional shape may include an elliptical shape, an eyebrow shape, a trefoil shape, or a similar non-circular cross-sectional shape. Of these, a flat shape is preferable from the viewpoint of improving mechanical strength and low anisotropy. The ratio of the average fiber length to the average fiber diameter (aspect ratio) of the flat cross-section glass fiber is 2 to 120, preferably 2.5 to 70, more preferably 3 to 50, and the ratio of the fiber length to the average fiber diameter. If the ratio is less than 2, the effect of improving the mechanical strength is small, and if the ratio of the fiber length to the average fiber diameter exceeds 120, the anisotropy increases and the appearance of the molded product also deteriorates. The average fiber diameter of such flat cross-section glass fibers refers to the number average fiber diameter when the flat cross-sectional shape is converted to a true circle of the same area. The average fiber length refers to the number average fiber length in the glass fiber reinforced resin composition of the present invention. The number-average fiber length is a value calculated by an image analyzer from an image obtained by observing the residue of the filler collected by processing such as high-temperature ashing of a molded product, dissolution with a solvent, and decomposition with a chemical, using an optical microscope. It is. Further, when calculating such a value, the fiber diameter is used as a guide and the length is less than that.

Various glass compositions represented by A glass, C glass, E glass, etc. are applied to the glass composition of said flat cross-section glass fiber, and it is not specifically limited. Such a glass filler may contain components such as TiO ₂ , SO ₃ , and P ₂ O ₅ as necessary. Among these, E glass (non-alkali glass) is more preferable. Such flat cross-section glass fibers are preferably subjected to a surface treatment with a known surface treatment agent such as a silane coupling agent, a titanate coupling agent, or an aluminate coupling agent from the viewpoint of improving mechanical strength. In addition, those that have been subjected to bundling treatment with olefin resin, styrene resin, acrylic resin, polyester resin, epoxy resin, urethane resin, etc. are preferable. From the viewpoint of mechanical strength, epoxy resin and urethane resin are preferred. Particularly preferred. The amount of the sizing agent attached to the flat cross-section glass fibers subjected to the bundling treatment is preferably 0.1 to 3 wt%, more preferably 0.2 to 1 wt%, in 100 wt% of the flat cross-section glass fibers.

(C component: fluorine-containing anti-dripping agent)
Examples of the fluorine-containing anti-drip agent for component C include fluorinated polymers having fibril-forming ability. Examples of such polymers include polytetrafluoroethylene and tetrafluoroethylene copolymers (for example, tetrafluoroethylene / hexafluoro). Propylene copolymers, etc.), partially fluorinated polymers as shown in U.S. Pat. No. 4,379,910, polycarbonate resins produced from fluorinated diphenols, and the like, preferably polytetrafluoroethylene (hereinafter referred to as “polytetrafluoroethylene”). Sometimes referred to as PTFE).

Polytetrafluoroethylene (fibrillated PTFE) having fibril-forming ability has a very high molecular weight, and exhibits a tendency to bind PTFE to each other by an external action such as shearing force to form a fiber. Its number average molecular weight ranges from 1.5 million to tens of millions. The lower limit is more preferably 3 million. The number average molecular weight is calculated based on the melt viscosity of polytetrafluoroethylene at 380 ° C. as disclosed in JP-A-6-145520. That is, the fibrillated PTFE has a melt viscosity at 380 ° C. measured by the method described in this publication in the range of 10 ⁷ to 10 ¹³ poise, preferably in the range of 10 ⁸ to 10 ¹² poise.

  Such PTFE can be used in solid form or in the form of an aqueous dispersion. In addition, PTFE having such fibril-forming ability can improve the dispersibility in the resin, and it is also possible to use a PTFE mixture in a mixed form with other resins in order to obtain better flame retardancy and mechanical properties. is there. Further, as disclosed in JP-A-6-145520, those having a structure having such a fibrillated PTFE as a core and a low molecular weight polytetrafluoroethylene as a shell are also preferably used.

  Examples of commercially available fibrillated PTFE include Teflon (registered trademark) 6J from Mitsui DuPont Fluorochemical Co., Ltd., Polyflon MPA FA500 and F-201L from Daikin Chemical Industries, Ltd. Commercially available aqueous dispersions of fibrillated PTFE include: Fluon AD-1, AD-936 manufactured by Asahi IC Fluoropolymers, Fluon D-1, D-2 manufactured by Daikin Industries, Ltd., Mitsui A representative example is Teflon (registered trademark) 30J manufactured by DuPont Fluorochemical Co., Ltd.

  As a mixed form of fibrillated PTFE, (1) a method in which an aqueous dispersion of fibrillated PTFE and an aqueous dispersion or solution of an organic polymer are mixed and co-precipitated to obtain a co-agglomerated mixture (JP-A-60-258263). (2) A method of mixing an aqueous dispersion of fibrillated PTFE and dried organic polymer particles (Japanese Patent Laid-Open No. 4-272957). Described method), (3) A method in which an aqueous dispersion of fibrillated PTFE and an organic polymer particle solution are uniformly mixed, and the respective media are simultaneously removed from the mixture (Japanese Patent Laid-Open Nos. 06-220210, (Method described in Japanese Patent Application Laid-Open No. 08-188653), (4) A method of polymerizing monomers forming an organic polymer in an aqueous dispersion of fibrillated PTFE (Method described in JP-A-9-95583), and (5) an aqueous dispersion of PTFE and an organic polymer dispersion are uniformly mixed, and then a vinyl monomer is further polymerized in the mixed dispersion. Thereafter, those obtained by a method for obtaining a mixture (a method described in JP-A No. 11-29679) can be used. Examples of commercially available fibrillated PTFE in a mixed form include “Metablene A3800” (trade name) manufactured by Mitsubishi Rayon Co., Ltd. and “BLENDEX B449” (trade name) manufactured by GE Specialty Chemicals.

  The proportion of fibrillated PTFE in the mixed form is preferably 10 to 80% by weight, more preferably 15 to 75% by weight, in 100% by weight of the mixture. When the ratio of fibrillated PTFE is in such a range, good dispersibility of fibrillated PTFE can be achieved.

(D component: flame retardant)
The D component flame retardant may be blended with various compounds known as flame retardants for the polycarbonate resin of the present invention. The compounding of such a compound brings about an improvement in flame retardancy, but besides that, based on the properties of each compound, for example, an improvement in antistatic property, fluidity, rigidity and thermal stability is brought about. Such flame retardants include (i) metal salt flame retardants (for example, alkali (earth) organic sulfonate metal salts, borate metal salt flame retardants, and stannate metal salt flame retardants), (ii) organic Phosphorus flame retardants (for example, monophosphate compounds, phosphate oligomer compounds, phosphonate oligomer compounds, phosphonitrile oligomer compounds, and phosphonic acid amide compounds), (iii) silicone flame retardants comprising silicone compounds (iv) alkali sulfonates ( Earth) Organic metal salts other than metal salts and the like.

(I) Metal salt flame retardant In the present invention, an alkali (earth) metal salt of a sulfonate is preferably used as the metal salt flame retardant. Among them, a metal salt of a fluorine-substituted alkylsulfonic acid such as a metal salt of a perfluoroalkylsulfonic acid having 1 to 10 carbon atoms, preferably 2 to 8 carbon atoms and an alkali metal or alkaline earth metal, and 7 to 50 carbon atoms. A metal salt of 7 to 40 aromatic sulfonic acid and an alkali metal or alkaline earth metal salt is preferable.

  Examples of the alkali metal constituting the metal salt of the present invention include lithium, sodium, potassium, rubidium and cesium, and examples of the alkaline earth metal include beryllium, magnesium, calcium, strontium and barium. More preferred is an alkali metal. Among such alkali metals, rubidium and cesium having larger ionic radii are suitable when the requirement for transparency is higher, but these are not general-purpose and difficult to purify, resulting in cost. It may be disadvantageous. On the other hand, metals with smaller ionic radii such as lithium and sodium may be disadvantageous in terms of flame retardancy. Considering these, the alkali metal in the sulfonic acid alkali metal salt can be properly used. In any respect, the sulfonic acid potassium salt having an excellent balance of properties is most preferable. Such potassium salts and sulfonic acid alkali metal salts comprising other alkali metals can be used in combination.

  Specific examples of alkali metal perfluoroalkyl sulfonates include potassium trifluoromethane sulfonate, potassium perfluorobutane sulfonate, potassium perfluorohexane sulfonate, potassium perfluorooctane sulfonate, sodium pentafluoroethane sulfonate, perfluoro Sodium butanesulfonate, sodium perfluorooctanesulfonate, lithium trifluoromethanesulfonate, lithium perfluorobutanesulfonate, lithium perfluoroheptanesulfonate, cesium trifluoromethanesulfonate, cesium perfluorobutanesulfonate, perfluorooctanesulfonate Cesium, cesium perfluorohexane sulfonate, rubidium perfluorobutane sulfonate, and perf Oro hexane sulfonate rubidium, and these may be used in combination of at least one or two. Here, the carbon number of the perfluoroalkyl group is preferably in the range of 1-18, more preferably in the range of 1-10, and still more preferably in the range of 1-8. Of these, potassium perfluorobutanesulfonate is particularly preferred.

The alkali (earth) metal salt of perfluoroalkylsulfonic acid composed of an alkali metal is usually mixed with not less than fluoride ions (F ⁻ ). The presence of such fluoride ions can be a factor that lowers the flame retardancy, so it is preferably reduced as much as possible. The ratio of such fluoride ions can be measured by ion chromatography. The content of fluoride ions is preferably 100 ppm or less, more preferably 40 ppm or less, and particularly preferably 10 ppm or less. Moreover, it is suitable that it is 0.2 ppm or more in terms of production efficiency. Such alkali (earth) metal salt of perfluoroalkylsulfonic acid having a reduced amount of fluoride ion is contained in a raw material when producing a fluorine-containing organometallic salt using a known production method. A method for reducing the amount of fluoride ions, a method for removing hydrogen fluoride and the like obtained by the reaction by a gas generated during the reaction or heating, and a purification method such as recrystallization and reprecipitation for producing a fluorine-containing organometallic salt Can be produced by a method of reducing the amount of fluoride ions using, for example. In particular, since the B component is relatively soluble in water, ion-exchanged water, particularly water having an electric resistance of 18 MΩ · cm or more, that is, an electric conductivity of about 0.55 μS / cm or less, and from room temperature is used. It is preferable to produce by a process of dissolving at high temperature and washing, then cooling and recrystallization.

  Specific examples of the aromatic (earth) metal salt of an aromatic sulfonate include, for example, disodium diphenyl sulfide-4,4′-disulfonate, dipotassium diphenyl sulfide-4,4′-disulfonate, potassium 5-sulfoisophthalate, Sodium 5-sulfoisophthalate, polysodium polyethylene terephthalate polysulfonate, calcium 1-methoxynaphthalene-4-sulfonate, disodium 4-dodecylphenyl ether disulfonate, polysodium poly (2,6-dimethylphenylene oxide) polysulfonate Poly (1,3-phenylene oxide) polysulfonic acid polysodium, poly (1,4-phenylene oxide) polysulfonic acid polysodium, poly (2,6-diphenylphenylene oxide) polysulfonic acid poly Lithium, poly (2-fluoro-6-butylphenylene oxide) polysulfonate, potassium sulfonate of benzenesulfonate, sodium benzenesulfonate, strontium benzenesulfonate, magnesium benzenesulfonate, dipotassium p-benzenedisulfonate, naphthalene-2 , 6-disulfonic acid dipotassium, biphenyl-3,3'-disulfonic acid calcium, diphenylsulfone-3-sulfonic acid sodium, diphenylsulfone-3-sulfonic acid potassium, diphenylsulfone-3,3'-disulfonic acid dipotassium, diphenylsulfone Α, α, α-trifluoroacetophenone sodium 4-sulfonate, dipotassium benzophenone-3,3′-disulfonate, Nene-2,5-disulfonate, dipotassium thiophene-2,5-disulfonate, calcium thiophene-2,5-disulfonate, sodium benzothiophenesulfonate, potassium diphenylsulfoxide-4-sulfonate, naphthalene Examples thereof include a formalin condensate of sodium sulfonate and a formalin condensate of sodium anthracene sulfonate. Among these aromatic sulfonate alkali (earth) metal salts, potassium salts are particularly preferable. Among these aromatic sulfonate alkali (earth) metal salts, potassium diphenylsulfone-3-sulfonate and dipotassium diphenylsulfone-3,3′-disulfonate are preferable, and particularly a mixture thereof (the former and the latter). Is preferably 15/85 to 30/70). The blending amount of the metal salt flame retardant is preferably 0.02 to 0.3 parts by weight, more preferably 0.04 to 0.15 parts by weight, based on 100 parts by weight of the total of the component A and the component B. More preferably, it is 0.05 to 0.1 parts by weight.

(Ii) Organophosphate ester flame retardant As the organophosphate ester flame retardant used as the component C of the present invention, one or more phosphate esters represented by the following general formula (1) are particularly used. Can be mentioned.

（但し上記式中のＸ^１は、ハイドロキノン、レゾルシノール、ビス（４−ヒドロキシジフェニル）メタン、ビスフェノールＡ、ジヒドロキシジフェニル、ジヒドロキシナフタレン、ビス（４−ヒドロキシフェニル）スルホン、ビス（４−ヒドロキシフェニル）ケトン及びビス（４−ヒドロキシフェニル）サルファイドからなる群から選ばれたジヒドロキシ化合物の２個の水酸基を除去して得られる二価の基が挙げられ、ｊ、ｋ、ｌ及びｍはそれぞれ独立して０または１であり、ｎは０〜５の整数であり、または重合度ｎの異なるリン酸エステルの混合物の場合はｎはその平均値を表し、０〜５の値であり、Ｒ^１、Ｒ^２、Ｒ^３、およびＲ^４はそれぞれ独立して１個以上のハロゲン原子で置換されていてもよいフェノール、クレゾール、キシレノール、イソプロピルフェノール、ブチルフェノール及びｐ−クミルフェノールからなる群から選ばれたモノヒドロキシ化合物の１個の水酸基を除去して得られる一価の基である。）

Wherein X ¹ in the above formula is hydroquinone, resorcinol, bis (4-hydroxydiphenyl) methane, bisphenol A, dihydroxydiphenyl, dihydroxynaphthalene, bis (4-hydroxyphenyl) sulfone, bis (4-hydroxyphenyl) ketone and A divalent group obtained by removing two hydroxyl groups of a dihydroxy compound selected from the group consisting of bis (4-hydroxyphenyl) sulfide, and j, k, l and m are each independently 0 or 1 and n is an integer of 0 to 5, or in the case of a mixture of phosphate esters having different degrees of polymerization n, n represents an average value of 0 to 5 and R ¹ , R ² , R ^3, and R ⁴ are each independently optionally substituted with one or more halogen atoms phenol, cresol, key Renoru, isopropyl phenol, butyl phenol and p- cumyl one monovalent group derived hydroxyl group by removal of the monohydroxy compound selected from the group consisting of phenol.)

Among these, X ¹ in the above formula is preferably a divalent group derived from hydroquinone, resorcinol or bisphenol A, j, k, l and m are each 1, and n is 0 to 3 In the case of a mixture of phosphate esters having different degrees of polymerization n, n represents an average value of 0 to 3, and R ¹ , R ² , R ³ , and R ⁴ are each independently And a monovalent group derived from phenol, cresol or xylenol which may be substituted with one or more halogen atoms.

More particularly preferably, X ¹ is a divalent group derived from resorcinol, j, k, l and m are each 1, n is 0 or 1, and R ¹ , R ² , R ³ , And R ⁴ are each independently a monovalent group derived from phenol or xylenol.

  Among these organic phosphates, triphenyl phosphate is preferable as a phosphate compound, and resorcinol bis (dixylenyl phosphate) and bisphenol A bis (diphenyl phosphate) are preferable as phosphate oligomers because of excellent hydrolysis resistance. More preferred are resorcinol bis (dixylenyl phosphate) and bisphenol A bis (diphenyl phosphate) from the viewpoint of heat resistance. The amount of the organic phosphate ester flame retardant is preferably 1 to 20 parts by weight, more preferably 2 to 10 parts by weight, still more preferably 2 to 2 parts by weight based on the total of 100 parts by weight of the component A and the component B. 7 parts by weight.

(Iii) Silicone Flame Retardant The silicone compound used as the silicone flame retardant of the present invention improves flame retardancy by a chemical reaction during combustion. As the compound, various compounds conventionally proposed as a flame retardant for aromatic polycarbonate resin can be used. The silicone compound binds itself during combustion or binds to a component derived from the resin to form a structure, or gives a flame retardant effect to the polycarbonate resin by a reduction reaction during the structure formation. It is considered. Therefore, it is preferable that a group having high activity in such a reaction is contained, and more specifically, a predetermined amount of at least one group selected from an alkoxy group and a hydrogen (ie, Si—H group) is contained. preferable. As a content rate of this group (alkoxy group, Si-H group), the range of 0.1-1.2 mol / 100g is preferable, the range of 0.12-1 mol / 100g is more preferable, 0.15-0. The range of 6 mol / 100 g is more preferable. Such a ratio can be determined by measuring the amount of hydrogen or alcohol generated per unit weight of the silicone compound by the alkali decomposition method. The alkoxy group is preferably an alkoxy group having 1 to 4 carbon atoms, and particularly preferably a methoxy group.

Generally, the structure of a silicone compound is constituted by arbitrarily combining the following four types of siloxane units. That is,
M units: (CH ₃ ) ₃ SiO _1/2 , H (CH ₃ ) ₂ SiO _1/2 , H ₂ (CH ₃ ) SiO _1/2 , (CH ₃ ) ₂ (CH ₂ = CH) SiO _1/2 Monofunctional siloxane units such as (CH ₃ ) ₂ (C ₆ H ₅ ) SiO _1/2 , (CH ₃ ) (C ₆ H ₅ ) (CH ₂ ═CH) SiO _1/2 ,
D unit: (CH ₃ ) ₂ SiO, H (CH ₃ ) SiO, H ₂ SiO, H (C ₆ H ₅ ) SiO, (CH ₃ ) (CH ₂ ═CH) SiO, (C ₆ H ₅ ) ₂ SiO Bifunctional siloxane units such as
T unit: (CH ₃ ) SiO _3/2 , (C ₃ H ₇ ) SiO _3/2 , HSiO _3/2 , (CH ₂ ═CH) SiO _3/2 , (C ₆ H ₅ ) SiO _3/2 etc. A trifunctional siloxane unit of
Q unit: a tetrafunctional siloxane unit represented by SiO ₂ .

Specifically, the structure of the silicone compound used in the silicone-based flame retardant is represented by the following formulas: D _n , T _p , M _m D _n , M _m T _p , M _m Q _q , M _m D _n T _{p , M m D n Q q,} M m T p Q q, M m D n T p Q q, D n T p, D n Q q, include _{D n} T p _{Q q.} Among these, preferable structures of the silicone compound are M _m D _n , M _m T _p , M _m D _n T _p , and M _m D _n Q _q , and more preferable structures are M _m D _n or M _m D _n. T _p .

Here, the coefficients m, n, p, and q in the above formula are integers of 1 or more that indicate the degree of polymerization of each siloxane unit, and the sum of the coefficients in each formula is the average degree of polymerization of the silicone compound. . This average degree of polymerization is preferably in the range of 3 to 150, more preferably in the range of 3 to 80, still more preferably in the range of 3 to 60, and particularly preferably in the range of 4 to 40. The better the range, the better the flame retardancy. Further, as described later, a silicone compound containing a predetermined amount of an aromatic group is excellent in transparency and hue.
When any of m, n, p, and q is a numerical value of 2 or more, the siloxane unit with the coefficient can be two or more types of siloxane units having different hydrogen atoms or organic residues to be bonded. .

  The silicone compound may be linear or have a branched structure. The organic residue bonded to the silicon atom is preferably an organic residue having 1 to 30 carbon atoms, more preferably 1 to 20 carbon atoms. Specific examples of such an organic residue include alkyl groups such as a methyl group, an ethyl group, a propyl group, a butyl group, a hexyl group, and a decyl group, a cycloalkyl group such as a cyclohexyl group, an aryl group such as a phenyl group, And aralkyl groups such as tolyl groups. More preferably, they are a C1-C8 alkyl group, an alkenyl group, or an aryl group. As the alkyl group, an alkyl group having 1 to 4 carbon atoms such as a methyl group, an ethyl group, and a propyl group is particularly preferable.

  Further, the silicone compound used as the silicone flame retardant preferably contains an aryl group. On the other hand, silane compounds and siloxane compounds as organic surface treatment agents for titanium dioxide pigments are clearly distinguished from silicone-based flame retardants in their preferred embodiments in that it is preferable to contain no aryl group. . A more preferable silicone flame retardant is a silicone having a ratio (aromatic group amount) of 10 to 70% by weight (more preferably 15 to 60% by weight) in which an aromatic group represented by the following general formula (2) is contained. A compound.

（式（２）中、Ｘはそれぞれ独立にＯＨ基、炭素数１〜２０の一価の有機残基を示す。ｎは０〜５の整数を表わす。さらに式（２）中においてｎが２以上の場合はそれぞれ互いに異なる種類のＸを取ることができる。）

(In formula (2), each X independently represents an OH group and a monovalent organic residue having 1 to 20 carbon atoms. N represents an integer of 0 to 5. Further, in formula (2), n is 2) In these cases, different types of X can be taken.)

  The silicone compound used as the silicone-based flame retardant may contain a reactive group in addition to the Si-H group and the alkoxy group. Examples of the reactive group include an amino group, a carboxyl group, an epoxy group, and a vinyl group. Examples thereof include a group, a mercapto group, and a methacryloxy group.

（式（３）および式（４）中、Ｚ^１〜Ｚ^３はそれぞれ独立に水素原子、炭素数１〜２０の一価の有機残基、または下記一般式（５）で示される化合物を示す。α１〜α３はそれぞれ独立に０または１を表わす。ｍ１は０もしくは１以上の整数を表わす。さらに式（３）中においてｍ１が２以上の場合の繰返し単位はそれぞれ互いに異なる複数の繰返し単位を取ることができる。） As the silicone compound having a Si—H group, a silicone compound containing at least one of structural units represented by the following general formulas (3) and (4) is preferably exemplified.

(In formula (3) and formula (4), Z ^{1 to} Z ³ each independently represent a hydrogen atom, a monovalent organic residue having 1 to 20 carbon atoms, or a compound represented by the following general formula (5). Α1 to α3 each independently represents 0 or 1. m1 represents 0 or an integer of 1 or more, and in formula (3), when m1 is 2 or more, the repeating units each represent a plurality of different repeating units. Can be taken.)

（式（５）中、Ｚ^４〜Ｚ^８はそれぞれ独立に水素原子、炭素数１〜２０の一価の有機残基を示す。α４〜α８はそれぞれ独立に０または１を表わす。ｍ２は０もしくは１以上の整数を表わす。さらに式（５）中においてｍ２が２以上の場合の繰返し単位はそれぞれ互いに異なる複数の繰返し単位を取ることができる。）

(In formula (5), Z ^{4 to} Z ⁸ each independently represents a hydrogen atom or a monovalent organic residue having 1 to 20 carbon atoms. Α 4 to α 8 each independently represents 0 or 1. m 2 represents 0. Alternatively, it represents an integer of 1 or more, and the repeating unit in the case where m2 is 2 or more in formula (5) can take a plurality of different repeating units.

  In the silicone compound used for the silicone-based flame retardant, examples of the silicone compound having an alkoxy group include at least one compound selected from compounds represented by the general formula (6) and the general formula (7).

（式（６）中、β^１はビニル基、炭素数１〜６のアルキル基、炭素数３〜６のシクロアルキル基、並びに炭素数６〜１２のアリール基およびアラルキル基を示す。γ^１、γ^２、γ^３、γ^４、γ^５、およびγ^６は炭素数１〜６のアルキル基およびシクロアルキル基、並びに炭素数６〜１２のアリール基およびアラルキル基を示し、少なくとも１つの基がアリール基またはアラルキル基である。δ^１、δ^２、およびδ^３は炭素数１〜４のアルコキシ基を示す。）

(In Formula (6), β ¹ represents a vinyl group, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, and an aryl group and an aralkyl group having 6 to 12 carbon atoms. Γ ¹ , γ ² , γ ³ , γ ⁴ , γ ⁵ , and γ ⁶ represent an alkyl group and a cycloalkyl group having 1 to ⁶ carbon atoms, and an aryl group and an aralkyl group having 6 to 12 carbon atoms, and at least one group is aryl. And δ ¹ , δ ² , and δ ³ are each an alkoxy group having 1 to 4 carbon atoms.)

（式（７）中、β^２およびβ^３はビニル基、炭素数１〜６のアルキル基、炭素数３〜６のシクロアルキル基、並びに炭素数６〜１２のアリール基およびアラルキル基を示す。γ^７、γ^８、γ^９、γ^１０、γ^１１、γ^１２、γ^１３およびγ^１４は炭素数１〜６のアルキル基、炭素数３〜６のシクロアルキル基、並びに炭素数６〜１２のアリール基およびアラルキル基を示し、少なくとも１つの基がアリール基またはアラルキルである。δ^４、δ^５、δ^６、およびδ^７は炭素数１〜４のアルコキシ基を示す。）

(In formula (7), β ² and β ³ represent a vinyl group, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, and an aryl group and an aralkyl group having 6 to 12 carbon atoms. γ ⁷ , γ ⁸ , γ ⁹ , γ ¹⁰ , γ ¹¹ , γ ¹² , γ ^13, and γ ¹⁴ are each an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, and 6 to 12 carbon atoms. An aryl group and an aralkyl group, and at least one group is an aryl group or an aralkyl group, and δ ⁴ , δ ⁵ , δ ⁶ , and δ ⁷ represent an alkoxy group having 1 to 4 carbon atoms.

  The blending amount of the silicone-based flame retardant is preferably 0.1 to 10 parts by weight, more preferably 0.5 to 7 parts by weight, and still more preferably 1 based on a total of 100 parts by weight of the component A and the component B. ~ 5 parts by weight.

(Iv) Organometallic salts other than alkali (earth) metal salts of sulfonates Organic metal salts other than alkali (earth) metal salts of sulfonates include alkali (earth) metal salts of sulfate esters and aromatic sulfonamides. Preferred examples include alkali (earth) metal salts. Examples of alkali (earth) metal salts of sulfates include alkali (earth) metal salts of sulfates of monovalent and / or polyhydric alcohols, and such monovalent and / or polyhydric alcohols. Examples of sulfuric acid esters include methyl sulfate, ethyl sulfate, lauryl sulfate, hexadecyl sulfate, polyoxyethylene alkylphenyl ether sulfate, pentaerythritol mono-, di-, tri-, tetra-sulfate, and lauric acid monoglyceride sulfate. Examples include esters, sulfates of palmitic acid monoglyceride, and sulfates of stearic acid monoglyceride. The alkali (earth) metal salts of these sulfates are preferably alkali (earth) metal salts of lauryl sulfate.

Alkali (earth) metal salts of aromatic sulfonamides include, for example, saccharin, N- (p-tolylsulfonyl) -p-toluenesulfonimide, N- (N′-benzylaminocarbonyl) sulfanilimide, and N- ( And an alkali (earth) metal salt of phenylcarboxyl) sulfanilimide.
The content of the organic metal salt other than the alkali (earth) sulfonate metal salt is preferably 0.02 to 0.3 parts by weight, more preferably based on 100 parts by weight of the total of the A component and the B component. It is 0.04-0.15 weight part, More preferably, it is 0.05-0.1 weight part.

(E component: reinforcing filler)
In the present invention, the high rigidity and low warpage of the polycarbonate resin may be insufficient in some cases. Therefore, it is preferable to contain a compound for improving such high rigidity and low warpage as the E component. With such a compound, the resin composition of the present invention becomes a resin material more suitable for an FPD fixing frame, particularly a large FPD fixing frame. That is, the strength of large and thin FPD fixing frames is more reliably improved because high rigidity and low warpage are maintained, and the resin composition can be adapted to a wide range of molding conditions, so that it is free from unreasonable filling conditions. Warpage of the FPD fixing frame is further reduced.

(E-1 component: plate-like inorganic filler)
Examples of the plate-like inorganic filler (E-1 component) used in the present invention include mica, talc, clay, graphite, glass flakes, and smectite minerals such as montmorillonite. Such plate-like inorganic fillers include those coated with metal or metal oxide. The E-1 component of the present invention is preferably at least one plate-like inorganic filler selected from mica, talc, and glass flakes, and mica is particularly preferable. These have less filler breakage at high filling than glass flakes and the like, and can provide more excellent rigidity. Further, it is also preferable that a non-defective product having a relatively high purity can be obtained easily and inexpensively.

  The glass flake used as the E-1 component of the present invention is a plate-like glass filler produced by a method such as a cylindrical blow method or a sol-gel method. Various kinds of glass flake raw materials can be selected depending on the degree of pulverization and classification. The average particle size of the glass flakes used for the raw material is preferably 10 to 1000 μm, more preferably 20 to 500 μm, and still more preferably 30 to 300 μm. This is because the above range is excellent in both handleability and moldability. Usually, a plate-like glass filler is cracked by melt-kneading with a resin, and its average particle size is reduced. The number average particle size of the glass flakes in the resin composition is preferably 10 to 200 μm, more preferably 15 to 100 μm, and still more preferably 20 to 80 μm. The number average particle size is calculated by an image analyzer from an image obtained by observing the residue of the sheet glass filler collected by high temperature ashing of the molded product, dissolution with a solvent, decomposition with chemicals, etc. with an optical microscope. Is the value to be Further, when calculating such a value, the flake thickness is used as a guide and the length of the flake is not counted. Moreover, as thickness, 0.5-10 micrometers is preferable, 1-8 micrometers is more preferable, 1.5-6 micrometers is still more preferable. The glass flakes having the above number average particle diameter and thickness achieve good strength and rigidity.

  The mica used as the E-1 component of the present invention is preferably a powder having an average particle size of 10 to 700 μm from the viewpoint of ensuring rigidity. Mica is a pulverized product of silicate mineral containing aluminum, potassium, magnesium, sodium, iron and the like. Mica includes muscovite, phlogopite, biotite, and artificial mica. Any mica can be used in the present invention, but muscovite is more rigid than phlogopite or biotite. Yes, muscovite is preferable in terms of rigidity. In addition, since phlogopite and biotite contain a larger amount of Fe in the main component than muscovite, their own hue becomes blackish, and muscovite is also suitable for various coloring. In addition, muscovite is advantageous in that artificial mica (natural phlogopite with OH group substituted by F) is expensive. Accordingly, muscovite is preferred in the present invention from various points of view.

  In addition, as a pulverization method in the production of mica, a dry pulverization method of pulverizing raw mica ore with a dry pulverizer, and coarsely pulverizing mica ore with a dry pulverizer, followed by adding a grinding aid such as water to a slurry state There is a wet pulverization method in which the main pulverization is performed with a wet pulverizer, followed by dehydration and drying.

  The lower limit of the average particle size of mica is preferably 10 μm or more as measured by the microtrack laser diffraction method, while the upper limit is 700 μm or less as the average particle size measured by the vibration screening method. preferable. It is preferable that the microtrack laser diffraction method is performed by using a vibration sieving method with a 325 mesh pass for 95% by weight or more of mica. For mica having a larger particle size, the vibration sieving method is generally used. In the vibration sieving method of the present invention, first, sieving is carried out for 10 minutes using a JIS standard standard sieve in which 100 g of mica powder to be used is stacked in the order of openings using a vibration sieve device. In this method, the particle size distribution is obtained by measuring the weight of the powder remaining on each sieve. The weight average particle diameter measured by the vibration sieving method is preferably in the range of 50 to 700 μm, and more preferably in the range of 50 to 400 μm because the impact strength is excellent. Such an effect of the particle size is particularly preferably exhibited in mica obtained using muscovite as a raw material. Those exceeding 700 μm are rare, and molding defects such as gate clogging during molding tend to occur, which is not preferable. On the other hand, pulverization of less than 10 μm is not economical because it requires an extremely large number of man-hours.

  As the thickness of mica, one having a thickness measured by observation with an electron microscope of 0.01 to 10 μm can be used. Further, such mica may be surface-treated with a silane coupling agent or the like, or may be granulated with a sizing agent such as various resins such as urethane resins or higher fatty acid esters.

The talc used as the E-1 component of the present invention is a scale-like particle having a layered structure, and is chemically hydrous magnesium silicate. In general, the chemical formula 4SiO ₂ .3MgO.2H ₂ O in is expressed, the normal SiO ₂ 56-65 wt%, the MgO 28 to 35 wt%, and a _{H 2} O about 5 wt%. As other minor components, Fe ₂ O ₃ is 0.03 to 1.2% by weight, Al ₂ O ₃ is 0.05 to 1.5% by weight, CaO is 0.05 to 1.2% by weight, K ₂ O. Is 0.2 wt% or less, Na ₂ O is 0.2 wt% or less, and the specific gravity is about 2.7. The particle size of talc shown here is the particle size at a 50% stacking rate determined from the particle size distribution measured by the Andreazen pipette method measured according to JIS M8016. The particle diameter is preferably 0.3 to 15 μm, more preferably 0.5 to 10 μm. In addition, there is no particular limitation on the production method when pulverizing such talc from raw stone, and axial flow mill method, annular mill method, roll mill method, ball mill method, jet mill method, container rotary compression shearing mill method, etc. Can be used. Furthermore, the talc after pulverization is preferably classified by various classifiers and has a uniform particle size distribution. There are no particular restrictions on the classifier, impactor type inertial force classifier (variable impactor, etc.), Coanda effect type inertial force classifier (elbow jet, etc.), centrifugal field classifier (multistage cyclone, microplex, dispersion separator) , Accucut, Turbo Classifier, Turboplex, Micron Separator, and Super Separator).

  Further, such talc is preferably in an agglomerated state in terms of its handleability and the like, and as such a production method, there are a method by deaeration compression, a method of compression using a sizing agent, and the like. In particular, the method by deaeration and compression is preferred because it is simple and does not include unnecessary sizing agent resin components in the composition of the present invention.

  The graphite used as the E-1 component of the present invention is scaly graphite. A resin composition containing such flaky graphite has good electrical conductivity, good mechanical strength, and low anisotropy.

  The particle size of the graphite of the present invention is in the range of 5 to 300 μm. The particle size is preferably 5 to 70 μm, more preferably 7 to 40 μm, and still more preferably 7 to 35 μm. By satisfying such a range, good flame retardancy is achieved. On the other hand, if the average particle size is less than 5 μm, the effect of improving the dimensional accuracy tends to be lowered, and if the average particle size exceeds 300 μm, the impact resistance is slightly lowered and so-called graphite floats on the surface of the molded product. It is not preferable. This is because the float on the surface may cause graphite to fall off the surface of the molded product and cause electrical damage to the electronic component. In addition, the above preferable average particle diameter has an advantage that the appearance of the molded product is improved and good slidability is easily obtained.

  The fixed carbon content of the graphite of the present invention is preferably 80% by weight or more, more preferably 90% by weight or more, and still more preferably 98% by weight or more. The volatile content of the graphite of the present invention is preferably 3% by weight or less, more preferably 1.5% by weight or less, and still more preferably 1% by weight or less.

The average particle diameter of the graphite in the present invention refers to the particle diameter of the E-1 component itself before the composition, and the particle diameter is determined by a laser diffraction method.
Further, the surface of graphite is subjected to surface treatment such as epoxy treatment, urethane treatment, silane coupling treatment, and oxidation treatment in order to increase the affinity with the thermoplastic resin as long as the characteristics of the composition of the present invention are not impaired. It may be given.

(E-2 component: fibrous inorganic filler)
As a fibrous inorganic filler used as E-2 component in the composition of this invention, well-known fibrous inorganic fillers other than B component can be mix | blended. Preferred examples of the fibrous inorganic filler include glass fibers other than the B component, glass milled fibers other than the B component, wollastonite, and carbon-based filler. Such fibrous inorganic fillers can also use fillers whose surfaces are coated with metal oxides such as titanium oxide, zinc oxide, cerium oxide, and silicon oxide. Examples of the carbon-based filler include carbon fiber, metal-coated carbon fiber, carbon milled fiber, vapor-grown carbon fiber, carbon nanotube, and carbon black. The carbon nanotube may be any one of a fiber diameter of 0.003 to 0.1 μm, a single layer, a double layer, and a multilayer, and a multilayer (so-called MWCNT) is preferable. Among these, carbon fiber and metal-coated carbon fiber are preferable in that they are excellent in mechanical strength and can impart good electrical conductivity.

  The fibrous inorganic filler may be previously surface treated with various surface treatment agents. Such surface treatment agents include silane coupling agents (including alkylalkoxysilanes and polyorganohydrogensiloxanes), higher fatty acid esters, acid compounds (for example, phosphorous acid, phosphoric acid, carboxylic acid, and carboxylic acid anhydrides). Etc.) and various surface treatment agents such as wax. Furthermore, it may be granulated with a sizing agent such as various resins, higher fatty acid esters, and waxes.

(About the amount of each component)
Next, the compounding quantity of the said B component-E component is demonstrated. The compounding quantity of B component is 1 to 60 weight% in total 100 weight% of A component and B component, Preferably it is 1 to 45 weight%, More preferably, it is 1 to 30 weight%. If the amount of component B is less than 1% by weight, the rigidity of the resin composition for a flat panel display fixing frame becomes insufficient, and if it exceeds 60% by weight, the surface smoothness is impaired. Is unsuitable.

  The compounding amount of the fluorine-containing anti-dripping agent (component C) is 0.01 to 0.6 parts by weight, more preferably 0.1 to 0.45 parts by weight, with respect to 100 parts by weight of the total of component A and component B. is there. If the C component is less than 0.01 part by weight, the effect of blending is difficult to be exhibited because the performance of preventing melt dripping at the time of combustion is insufficient, and if it exceeds 0.6 part by weight, the impact strength is reduced and molding is caused by poor dispersion. It is not suitable because the surface of the product becomes rough.

  The blending amount of the flame retardant (D component) is 0.01 to 20 parts by weight, more preferably 0.03 to 13 parts by weight, still more preferably 0.05 to 100 parts by weight with respect to the total of 100 parts by weight of the A component and the B component. 10 parts by weight. If the D component is less than 0.01 part by weight, the flame retardancy of the resin composition is not sufficiently improved, so that the effect of blending is hardly exhibited, and if it exceeds 20 parts by weight, the mechanical strength decreases, which is not preferable.

  The compounding amount of the reinforcing filler (E component) is 1 to 50 parts by weight, preferably 1 to 40 parts by weight, and more preferably 5 to 30 parts by weight with respect to 100 parts by weight of the total of the A component and the B component. If the E component is 1 part by weight or less, the improvement effect of high rigidity and low warpage is hardly exhibited, and if it exceeds 50 parts by weight, the appearance of the molded product and the molding fluidity are unsuitable.

(Other additives)
In addition to the above components A to E, various additives that are usually compounded in polycarbonate resin can be blended in the resin composition for a flat panel display fixing frame of the present invention.

(I) Phosphorus stabilizer It is preferable that a phosphorus stabilizer is further blended in the resin composition for a flat panel display fixing frame of the present invention. Such phosphorus stabilizers improve thermal stability during production or molding, and improve mechanical properties, hue, and molding stability. Examples of phosphorus stabilizers include phosphorous acid, phosphoric acid, phosphonous acid, phosphonic acid and esters thereof, and tertiary phosphine.

  Specifically, as the phosphite compound, for example, triphenyl phosphite, tris (nonylphenyl) phosphite, tridecyl phosphite, trioctyl phosphite, trioctadecyl phosphite, didecyl monophenyl phosphite, dioctyl monophenyl Phosphite, diisopropyl monophenyl phosphite, monobutyl diphenyl phosphite, monodecyl diphenyl phosphite, monooctyl diphenyl phosphite, 2,2-methylenebis (4,6-di-tert-butylphenyl) octyl phosphite, tris ( Diethylphenyl) phosphite, tris (di-iso-propylphenyl) phosphite, tris (di-n-butylphenyl) phosphite, tris (2,4-di-tert-butylpheny) ) Phosphite, tris (2,6-di-tert-butylphenyl) phosphite, distearyl pentaerythritol diphosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, bis (2 , 6-Di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, bis (2,6-di-tert-butyl-4-ethylphenyl) pentaerythritol diphosphite, phenylbisphenol A pentaerythritol diphosphite Phyto, bis (nonylphenyl) pentaerythritol diphosphite, dicyclohexyl pentaerythritol diphosphite, and the like.

  Further, as other phosphite compounds, those which react with dihydric phenols and have a cyclic structure can be used. For example, 2,2′-methylenebis (4,6-di-tert-butylphenyl) (2,4-di-tert-butylphenyl) phosphite, 2,2′-methylenebis (4,6-di-tert- Butylphenyl) (2-tert-butyl-4-methylphenyl) phosphite, 2,2′-methylenebis (4-methyl-6-tert-butylphenyl) (2-tert-butyl-4-methylphenyl) phosphite 2,2′-ethylidenebis (4-methyl-6-tert-butylphenyl) (2-tert-butyl-4-methylphenyl) phosphite.

  Examples of the phosphate compound include tributyl phosphate, trimethyl phosphate, tricresyl phosphate, triphenyl phosphate, trichlorophenyl phosphate, triethyl phosphate, diphenyl cresyl phosphate, diphenyl monoorxenyl phosphate, tributoxyethyl phosphate, dibutyl phosphate, dioctyl phosphate, Examples thereof include diisopropyl phosphate, and triphenyl phosphate and trimethyl phosphate are preferable.

  Examples of the phosphonite compound include tetrakis (2,4-di-tert-butylphenyl) -4,4′-biphenylenediphosphonite, tetrakis (2,4-di-tert-butylphenyl) -4,3′-biphenylenedi. Phosphonite, tetrakis (2,4-di-tert-butylphenyl) -3,3′-biphenylenediphosphonite, tetrakis (2,6-di-tert-butylphenyl) -4,4′-biphenylenediphosphonite Tetrakis (2,6-di-tert-butylphenyl) -4,3′-biphenylene diphosphonite, tetrakis (2,6-di-tert-butylphenyl) -3,3′-biphenylene diphosphonite, bis (2,4-di-tert-butylphenyl) -4-phenyl-phenylphosphonite, bis (2,4-di tert-butylphenyl) -3-phenyl-phenylphosphonite, bis (2,6-di-n-butylphenyl) -3-phenyl-phenylphosphonite, bis (2,6-di-tert-butylphenyl)- 4-phenyl-phenylphosphonite, bis (2,6-di-tert-butylphenyl) -3-phenyl-phenylphosphonite, and the like, and tetrakis (di-tert-butylphenyl) -biphenylenediphosphonite, bis (Di-tert-butylphenyl) -phenyl-phenylphosphonite is preferred, tetrakis (2,4-di-tert-butylphenyl) -biphenylenediphosphonite, bis (2,4-di-tert-butylphenyl)- More preferred is phenyl-phenylphosphonite. Such a phosphonite compound is preferable because it can be used in combination with a phosphite compound having an aryl group in which two or more alkyl groups are substituted.

  Examples of the phosphonate compound include dimethyl benzenephosphonate, diethyl benzenephosphonate, and dipropyl benzenephosphonate.

  Tertiary phosphine includes triethylphosphine, tripropylphosphine, tributylphosphine, trioctylphosphine, triamylphosphine, dimethylphenylphosphine, dibutylphenylphosphine, diphenylmethylphosphine, diphenyloctylphosphine, triphenylphosphine, tri-p-tolyl. Examples include phosphine, trinaphthylphosphine, and diphenylbenzylphosphine. A particularly preferred tertiary phosphine is triphenylphosphine.

  The phosphorus stabilizers can be used alone or in combination of two or more. Among the phosphorus stabilizers, an alkyl phosphate compound typified by trimethyl phosphate is preferably blended. A combination of such an alkyl phosphate compound and a phosphite compound and / or phosphonite compound is also a preferred embodiment.

(II) Hindered phenol stabilizer The hindered phenol stabilizer can be further blended in the resin composition for a flat panel display fixing frame of the present invention. Such blending exhibits an effect of suppressing, for example, hue deterioration during molding and hue deterioration during long-term use. Examples of the hindered phenol-based stabilizer include α-tocopherol, butylhydroxytoluene, sinapir alcohol, vitamin E, n-octadecyl-β- (4′-hydroxy-3 ′, 5′-di-tert-butylfel). Propionate, 2-tert-butyl-6- (3′-tert-butyl-5′-methyl-2′-hydroxybenzyl) -4-methylphenyl acrylate, 2,6-di-tert-butyl-4- (N , N-dimethylaminomethyl) phenol, 3,5-di-tert-butyl-4-hydroxybenzylphosphonate diethyl ester, 2,2′-methylenebis (4-methyl-6-tert-butylphenol), 2,2′- Methylene bis (4-ethyl-6-tert-butylphenol), 4,4′-methylene bis (2,6- Di-tert-butylphenol), 2,2′-methylenebis (4-methyl-6-cyclohexylphenol), 2,2′-dimethylene-bis (6-α-methyl-benzyl-p-cresol) 2,2′- Ethylidene-bis (4,6-di-tert-butylphenol), 2,2'-butylidene-bis (4-methyl-6-tert-butylphenol), 4,4'-butylidenebis (3-methyl-6-tert- Butylphenol), triethylene glycol-N-bis-3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate, 1,6-hexanediol bis [3- (3,5-di-tert -Butyl-4-hydroxyphenyl) propionate], bis [2-tert-butyl-4-methyl 6- (3-tert-butyl) -5-methyl-2-hydroxybenzyl) phenyl] terephthalate, 3,9-bis {2- [3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy] -1,1,- Dimethylethyl} -2,4,8,10-tetraoxaspiro [5,5] undecane, 4,4′-thiobis (6-tert-butyl-m-cresol), 4,4′-thiobis (3-methyl) -6-tert-butylphenol), 2,2'-thiobis (4-methyl-6-tert-butylphenol), bis (3,5-di-tert-butyl-4-hydroxybenzyl) sulfide, 4,4'- Di-thiobis (2,6-di-tert-butylphenol), 4,4′-tri-thiobis (2,6-di-tert-butylphenol), 2,2-thiodiethyl Nbis- [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 2,4-bis (n-octylthio) -6- (4-hydroxy-3 ′, 5′-di- tert-butylanilino) -1,3,5-triazine, N, N′-hexamethylenebis- (3,5-di-tert-butyl-4-hydroxyhydrocinnamide), N, N′-bis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionyl] hydrazine, 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 1,3,5 -Trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene, tris (3,5-di-tert-butyl-4-hydroxyphenyl) iso Anurate, tris (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, 1,3,5-tris (4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanurate, 1,3,5-tris 2 [3 (3,5-di-tert-butyl-4-hydroxyphenyl) propionyloxy] ethyl isocyanurate and tetrakis [methylene-3- (3 ′, 5′-di-tert -Butyl-4-hydroxyphenyl) propionate] methane and the like. All of these are readily available. The said hindered phenol type stabilizer can be used individually or in combination of 2 or more types.

  The compounding amount of the phosphorus stabilizer and the hindered phenol stabilizer is 0.0001 to 1 part by weight, preferably 0.001 to 0.5 part by weight, based on 100 parts by weight of the aromatic polycarbonate resin (component A). More preferably, it is 0.005-0.3 weight part. When the amount of the stabilizer is too much less than the above range, it is difficult to obtain a good stabilizing effect. When the amount exceeds the above range, the physical properties of the composition may be lowered.

(III) Heat stabilizer other than the above The heat stabilizer other than the phosphorus stabilizer and the hindered phenol stabilizer can be blended in the resin composition for a flat panel display fixing frame of the present invention. Preferable examples of such other heat stabilizers include lactone stabilizers represented by a reaction product of 3-hydroxy-5,7-di-tert-butyl-furan-2-one and o-xylene. Is done. Details of such a stabilizer are described in JP-A-7-233160. Such a compound is commercially available as Irganox HP-136 (trademark, manufactured by CIBA SPECIALTY CHEMICALS) and can be used. Furthermore, a stabilizer obtained by mixing the compound with various phosphite compounds and hindered phenol compounds is commercially available. For example, Irganox HP-2921 manufactured by the above company is preferably exemplified. The blending amount of the lactone stabilizer is preferably 0.0005 to 0.05 parts by weight, more preferably 0.001 to 0.03 parts by weight with respect to 100 parts by weight of the component A.

  Other stabilizers include sulfur-containing stabilizers such as pentaerythritol tetrakis (3-mercaptopropionate), pentaerythritol tetrakis (3-laurylthiopropionate), and glycerol-3-stearylthiopropionate. Illustrated. The amount of the sulfur-containing stabilizer is preferably 0.001 to 0.1 parts by weight, more preferably 0.01 to 0.08 parts by weight, per 100 parts by weight of component A.

(IV) Ultraviolet Absorber In the resin composition for a flat panel display fixing frame of the present invention, an ultraviolet absorber can be blended for the purpose of imparting light resistance.
Specific examples of the ultraviolet absorber include benzophenone-based compounds such as 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, and 2-hydroxy-4-benzyloxy. Benzophenone, 2-hydroxy-4-methoxy-5-sulfoxybenzophenone, 2-hydroxy-4-methoxy-5-sulfoxytrihydride benzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2 ', 4,4′-tetrahydroxybenzophenone, 2,2′-dihydroxy-4,4′-dimethoxybenzophenone, 2,2′-dihydroxy-4,4′-dimethoxy-5-sodiumsulfoxybenzophenone, bis (5- Benzoyl-4-hydroxy-2-methoxy Phenyl) methane, 2-hydroxy-4-n-dodecyloxybenzophenone, 2-hydroxy-4-methoxy-2′-carboxybenzophenone and the like.

  Specific examples of the ultraviolet absorber include, for example, 2- (2-hydroxy-5-methylphenyl) benzotriazole and 2- (2-hydroxy-5-tert-octylphenyl) benzotriazole in the benzotriazole series. 2- (2-hydroxy-3,5-dicumylphenyl) phenylbenzotriazole, 2- (2-hydroxy-3-tert-butyl-5-methylphenyl) -5-chlorobenzotriazole, 2,2′- Methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2H-benzotriazol-2-yl) phenol], 2- (2-hydroxy-3,5-di-tert-butylphenyl) ) Benzotriazole, 2- (2-hydroxy-3,5-di-tert-butylphenyl) -5-chlorobenzotriazol 2- (2-hydroxy-3,5-di-tert-amylphenyl) benzotriazole, 2- (2-hydroxy-5-tert-octylphenyl) benzotriazole, 2- (2-hydroxy-5- tert-butylphenyl) benzotriazole, 2- (2-hydroxy-4-octoxyphenyl) benzotriazole, 2,2'-methylenebis (4-cumyl-6-benzotriazolephenyl), 2,2'-p -Phenylenebis (1,3-benzoxazin-4-one), and 2- [2-hydroxy-3- (3,4,5,6-tetrahydrophthalimidomethyl) -5-methylphenyl] benzotriazole, and 2- (2'-Hydroxy-5-methacryloxyethylphenyl) -2H-benzotriazole and co-polymerized with the monomer 2 such as a copolymer with a possible vinyl monomer and a copolymer of 2- (2′-hydroxy-5-acryloxyethylphenyl) -2H-benzotriazole with a vinyl monomer copolymerizable with the monomer Examples include polymers having a -hydroxyphenyl-2H-benzotriazole skeleton.

  Specifically, the ultraviolet absorber is, for example, 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-hexyloxyphenol, 2- (4, 4-hydroxyphenyltriazine). 6-diphenyl-1,3,5-triazin-2-yl) -5-methyloxyphenol, 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-ethyloxyphenol 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-propyloxyphenol, and 2- (4,6-diphenyl-1,3,5-triazin-2-yl) ) -5-butyloxyphenol and the like. Furthermore, the phenyl group of the above exemplary compounds such as 2- (4,6-bis (2,4-dimethylphenyl) -1,3,5-triazin-2-yl) -5-hexyloxyphenol is 2,4-dimethyl. Examples of the compound are phenyl groups.

  Specifically, in the case of the cyclic imino ester, the ultraviolet absorber is, for example, 2,2′-p-phenylenebis (3,1-benzoxazin-4-one), 2,2′-m-phenylenebis (3,1). -Benzoxazin-4-one), 2,2'-p, p'-diphenylenebis (3,1-benzoxazin-4-one) and the like.

  Further, as the ultraviolet absorber, specifically, for cyanoacrylate, for example, 1,3-bis-[(2′-cyano-3 ′, 3′-diphenylacryloyl) oxy] -2,2-bis [(2- Examples include cyano-3,3-diphenylacryloyl) oxy] methyl) propane and 1,3-bis-[(2-cyano-3,3-diphenylacryloyl) oxy] benzene.

  Furthermore, the ultraviolet absorber has a structure of a monomer compound capable of radical polymerization, so that the ultraviolet absorbent monomer and / or the light stable monomer and a single amount of alkyl (meth) acrylate or the like can be obtained. It may be a polymer type ultraviolet absorber copolymerized with a body. Preferred examples of the ultraviolet absorbing monomer include compounds containing a benzotriazole skeleton, a benzophenone skeleton, a triazine skeleton, a cyclic imino ester skeleton, and a cyanoacrylate skeleton in the ester substituent of (meth) acrylic acid ester. The

  Among them, benzotriazole and hydroxyphenyltriazine are preferable in terms of ultraviolet absorption ability, and cyclic imino ester and cyanoacrylate are preferable in terms of heat resistance and hue. You may use the said ultraviolet absorber individually or in mixture of 2 or more types.

  The compounding quantity of a ultraviolet absorber is 0.01-2 weight part with respect to 100 weight part of aromatic polycarbonate resin (A component), Preferably it is 0.03-2 weight part, More preferably, it is 0.02-1 weight part. More preferably, it is 0.05 to 0.5 parts by weight.

(V) Other Resins and Elastomers The resin composition for a flat panel display fixing frame of the present invention exhibits the effects of the present invention by using other resins and elastomers instead of a part of the A component aromatic polycarbonate resin. A small percentage can be used in the range. The blending amount of other resins and elastomers is preferably 20% by weight or less, more preferably 10% by weight or less, and still more preferably 5% by weight or less in a total of 100% by weight with the component A.

  Examples of such other resins include polyester resins such as polyethylene terephthalate and polybutylene terephthalate, polyamide resins, polyimide resins, polyetherimide resins, polyurethane resins, silicone resins, polyphenylene ether resins, polyphenylene sulfide resins, polysulfone resins, polyethylene, and polypropylene. And other resins such as polyolefin resins, polymethacrylate resins, phenol resins, and epoxy resins.

  As the elastomer, for example, isobutylene / isoprene rubber, styrene / butadiene rubber, ethylene / propylene rubber, acrylic elastomer, polyester elastomer, polyamide elastomer, MBS (methyl methacrylate / sterene / butadiene) which is a core-shell type elastomer. Examples thereof include rubber and MAS (methyl methacrylate / acrylonitrile / styrene) rubber.

(VI) Other components than the above In addition to the above, the resin composition for a flat panel display fixing frame of the present invention is an additive known per se for imparting various functions to a molded product and improving properties. Can be blended in a small proportion. These additives are used in usual amounts as long as the object of the present invention is not impaired.
Examples of such additives include sliding agents (for example, PTFE particles), colorants (for example, pigments and dyes such as carbon black and titanium oxide), light diffusing agents (for example, acrylic crosslinked particles, silicone crosslinked particles, calcium carbonate particles), fluorescence Dyes, fluorescent brighteners, light stabilizers (typified by hindered amine compounds), inorganic phosphors (for example, phosphors having aluminate as a mother crystal), antistatic agents, crystal nucleating agents, inorganic and organic antibacterials Agents, photocatalytic antifouling agents (eg fine particle titanium oxide, fine particle zinc oxide), release agents, flow modifiers, radical generators, infrared absorbers (heat ray absorbers), and photochromic agents.

(Manufacture of polycarbonate resin composition)
In order to produce the resin composition for a flat panel display fixing frame of the present invention, any method is adopted. For example, the A component and the B component, preferably the C component to the E component, are added to the melt kneader typified by a vent type twin screw extruder, optionally together with other components as necessary, and melt kneaded . Usually, the strand extruded from the extruder die is cooled through a water tank, and the cooled strand is cut with a pelletizer to obtain pellets made of the resin composition. At the time of supply to the extruder, the raw materials can be premixed. Examples of the premixing means include a V-type blender, a Henschel mixer, a mechanochemical apparatus, and an extrusion mixer. The raw material and its premixed mixture may be granulated by an extrusion granulator or a briquetting machine, if necessary.

  As a method for supplying each component to the melt-kneader, (i) a method for supplying component A, component B, and other components independently to the melt-kneader, (ii) component A, component B, and other components A method in which a part of the components is premixed and then supplied to the melt-kneader independently of the remaining components, (iii) a method in which a part of the components is diluted and mixed with water or an organic solvent and then supplied to the melt-kneader. (Iv) A method in which the diluted mixture is premixed with other components and then supplied to a melt kneader. In addition, when there exists a liquid thing in the component to mix | blend, what is called a liquid injection apparatus or a liquid addition apparatus can be used for supply to a melt kneader. In particular, when talc is blended as the E component and solid PTFE is blended as the C component, a method of improving the dispersibility by preliminarily mixing the talc and the C component can be used.

  A preferred extruder has a vent capable of degassing moisture in the raw material and volatile gas generated from the melt-kneaded resin. A pressure reducing pump such as a vacuum pump is preferably installed in the vent. By such installation, generated moisture and volatile gas are efficiently discharged outside the extruder. It is also possible to remove a foreign substance from the resin composition by installing a screen for removing the foreign substance mixed in the extrusion raw material in the zone in front of the extruder die. Examples of such screens include wire meshes, screen changers, and sintered metal plates (such as disk filters). Examples of the melt kneader include a banbury mixer, a kneading roll, a single screw extruder, a multi-screw extruder having three or more axes, in addition to the twin screw extruder.

  The resin extruded as described above is directly cut into pellets, or after forming strands, the strands are cut with a pelletizer to be pelletized. The shape of the pellet may be a general shape such as a cylinder, a prism, or a sphere, but is more preferably a cylinder. Such a cylinder includes an elliptic cylinder. The diameter of such a cylinder is preferably 1 to 5 mm, more preferably 1.5 to 4 mm, and still more preferably 2 to 3.3 mm. In the case of an elliptic cylinder, such a diameter preferably includes both the major axis and the minor axis. On the other hand, the length of the cylinder is preferably 1 to 30 mm, more preferably 2 to 5 mm, and still more preferably 2.5 to 3.5 mm.

(Molding)
The flat panel display fixing frame of the present invention can be obtained by injection molding of pellets of a resin composition usually produced as described above. A preferred embodiment of the polycarbonate resin composition of the present invention, in particular, a polycarbonate resin composition containing all components A to E, has a thickness of 0.8 to 1.6 mm in the UL standard 94 vertical combustion test. It can be satisfied that the compound has a thickness such that the combustion rank of the test piece is V-0, and a compound in which chlorine atoms and bromine atoms are chemically bonded is not blended. Therefore, according to the present invention, the production of the flat panel display fixing frame of the constitutions (8) and (9) comprising the steps -i to -iii described above by injection-molding pellets made of such a polycarbonate resin composition. A method is provided.

  In such injection molding, not only ordinary molding methods but also injection compression molding, injection press molding, gas assist injection molding, foam molding (including a method of injecting a supercritical fluid), insert molding, in-mold coating molding, heat insulation Examples thereof include mold molding, rapid heating / cooling mold molding, two-color molding, sandwich molding, and ultra-high speed injection molding. In addition, either a cold runner method or a hot runner method can be selected for molding.

  The diameter of the pin gate is preferably in the range of 0.4 to 1.5 mm, more preferably in the range of 0.6 to 1.3 mm, and still more preferably in the range of 0.8 to 1.1 mm. If it is smaller than the above range, the moldability tends to be lowered, and if it is too large, the cooling time becomes longer and the productivity becomes inferior. The number of pin gates is preferably in the range of 4 to 30, more preferably 8 to 25, and still more preferably 10 to 22. The resin composition for a flat panel display fixing frame of the present invention provides a good FPD fixing frame even if it is a molded product that is such a multipoint gate and has a high probability of occurrence of foreign matter.

  The shape of the FPD fixing frame is preferably in the range of 200 to 800 mm for the short side and 300 to 1300 mm for the long side. Here, the long side has a length equal to or longer than the short side. The ratio of long side to short side (long side / short side) is preferably in the range of 51/49 to 80/20, more preferably 55/45 to 75/25, still more preferably 58/42 to 35/65. It is. The occupied area ratio of the frame portion is preferably in the range of 10 to 30%, more preferably 13 to 27%, and still more preferably 17 to 23%. Here, the occupied area ratio of the frame part means a percentage of the projected area of the frame part with respect to the projected area of the part surrounded by the outer periphery of the frame when the FPD fixed frame is projected onto a plane parallel to the fixed surface. The projected area of the FPD fixing frame does not include a hole portion or the like. Therefore, the projected area of the FPD fixed frame is an area obtained by subtracting the projected area of the space portion in the frame from the projected area of the portion surrounded by the outer periphery of the frame.

  In the flat panel display fixing frame of the present invention, the thickness of the inner edge of the frame for mounting the flat panel display is preferably in the range of 0.3 to 1 mm. Such thickness is more preferably 0.4 to 0.8 mm. The resin composition for a flat panel display fixing frame of the present invention has such a thin portion, and is good even for a molded product that requires high rigidity, low warpage and excellent surface smoothness, and further weld strength. An FPD fixing frame is provided.

  The resin composition for a fixed frame of the flat panel display of the present invention has good flame retardancy, rigidity and low warpage even if it does not contain an organic halogen flame retardant which is a compound in which chlorine atoms or bromine atoms are chemically bonded. In addition, it has a feature that it has a high weld strength that adversely affects the strength of the thin-walled FPD frame molded product and is excellent in surface smoothness. While the importance of foreign matter management associated with the recent increase in size and image quality of FPDs is regarded as important, the resin composition for a flat panel display fixing frame of the present invention is suitably used. As is clear from the above, the industrial effects exhibited by the present invention are extremely great.

  The form of the present invention considered to be the best by the present inventors is a collection of the preferable ranges of the above requirements. For example, typical examples are described in the following examples. Of course, the present invention is not limited to these forms.

  The present invention will be further described below with reference to examples, but the present invention is not limited thereto. The evaluation items and symbols of each component in the composition mean the following contents.

[Examples 1-12, Comparative Examples 1-8]
(Production of flame retardant thermoplastic resin composition)
The composition shown in Tables 1 and 2 is used to uniformly mix an aromatic polycarbonate resin, a flat cross-section glass fiber, a silicate mineral, or a filler for comparison, and other components using a tumbler to create a premix. The mixture was supplied from a first supply port located at the screw root of the extruder. In addition, when supplying to a tumbler, the master mixed uniformly with the powder of PC-2 so that each component might become the following density | concentrations was created, and this master was supplied to the tumbler. That is, PTFE, F114P, and TMP were 10 wt% masters. The obtained preliminary mixture is supplied to the first supply port (screw base) of a vent type twin screw extruder [TEX30XSST manufactured by Nippon Steel Works, Ltd.] having a diameter of 30 mmφ, and the cylinder temperature is 280 ° C., the screw rotation speed is 150 rpm, and the discharge is performed. It was melt-extruded and pelletized at an amount of 20 kg / h and a vent vacuum of 3 kPa. However, only CR-741 of other components is in a predetermined ratio from the supply port in the middle of the cylinder by using a liquid injection device [HYM-JS-08 manufactured by Fuji Techno Industry Co., Ltd.] while being heated to 80 ° C. Were fed independently into the extruder.

(I) Evaluation item (1) Preparation and characteristic evaluation of flat panel display fixed frame body The obtained pellets were dried at 120 ° C. for 5 hours by a hot air circulation dryer. After drying, the pellets were molded into a flat panel display fixing frame shown in FIG. 1 using an injection molding machine (FN8000 manufactured by Nissei Plastic Industry Co., Ltd.) having a cylinder inner diameter of 50 mmφ. The mold was a pin gate with a diameter of 1.0 mm and was a cold runner method. Molding conditions were a cylinder temperature of 310 ° C. and a mold temperature of 95 ° C. and an injection speed of 170 mm / sec. The following evaluation was performed (however, for pellets added with a phosphorus flame retardant, at 100 ° C. for 5 hours) The product was dried by a hot air circulation dryer and molded at a cylinder temperature of 290 ° C. and a mold temperature of 90 ° C.).
(1-1) Surface smoothness The flat surface of the liquid crystal display unit mounting portion in the flat panel display fixed frame shown in the figure was cut out, and the glossiness of the surface was measured with a gloss meter (manufactured by GLOSS METER GM-3D MURAKAMI COLOR LAB).
(1-2) Low warpage After adjusting the flat panel display fixed frame for 24 hours at 23 ° C, 50% RH, the flow direction of the fixed frame and the dimensions in the perpendicular direction are measured with a three-dimensional measuring machine (Mitoyo Seisakusho). The molding shrinkage in the flow direction and the right-angle direction was obtained by measurement using Micropak 550).
(1-3) Flatness of liquid crystal display unit mounting portion A flat plate glass unit having a thickness of 2 mm was placed, and the flatness was confirmed by observing the presence or absence of rattling.

(2) Evaluation of material properties Part of the obtained pellets was dried with a hot air circulation dryer at 120 ° C for 5 hours, and then injected with an injection molding machine (SG-150U manufactured by Sumitomo Heavy Industries, Ltd.). A test piece for each test shown below was prepared and evaluated at a cylinder temperature of 300 ° C. and a mold temperature of 80 ° C.
(2-1) Flexural modulus: measured in accordance with ASTM D790 (measurement condition 23 ° C.). In addition, the test piece was shape | molded by the cylinder temperature of 280 degreeC and the mold temperature of 60 degreeC with the injection molding machine (Sumitomo Heavy Industries, Ltd. SG-150U).
(2-2) Bending strength (with weld, without weld): ASTM D638 type I test piece was used, and the test piece with weld was filled from the side gates provided on both sides of the test piece, and the center of the test piece Weld was created. A test piece without weld was prepared by sealing one gate. The obtained test piece was measured according to ASTM D790 (measurement condition 23 ° C.). In addition, the test piece was shape | molded by the cylinder temperature of 280 degreeC and the mold temperature of 60 degreeC with the injection molding machine (Sumitomo Heavy Industries, Ltd. SG-150U).
(2-3) Weld strength retention rate: (bending strength with weld) / (bending strength without weld) × 100 = weld strength retention rate (%).
(2-4) Flame retardancy A vertical combustion test of UL standard 94 was conducted at thicknesses of 0.8 mm and 1.6 mm, and the grade was evaluated.

(II) Symbol of each component in the composition (component A)
PC-1: Linear aromatic polycarbonate resin powder synthesized by interfacial polycondensation from bisphenol A, p-tert-butylphenol as a terminal terminator, and phosgene (manufactured by Teijin Chemicals Ltd .: Panlite L-1225WX, viscosity) Average molecular weight 19,700)
PC-2: Linear aromatic polycarbonate resin powder synthesized by interfacial polycondensation from bisphenol A and p-tert-butylphenol as a terminal terminator and phosgene (manufactured by Teijin Chemicals Ltd .: CM-1000, viscosity average molecular weight) 16,000)

(B component)
HGF-1: flat section chopped glass fiber (manufactured by Nitto Boseki Co., Ltd .: CSG 3PA-820, major axis 27 μm, minor axis 4 μm, cut length 3 mm, urethane sizing agent)
HGF-2: flat cross-section chopped glass fiber (manufactured by Nittobo Co., Ltd .: CSG 3PA-830, major axis 27 μm, minor axis 4 μm, cut length 3 mm, epoxy-based sizing agent)
(For comparison of B component)
GF-1: Circular cross-section chopped glass fiber (manufactured by Nippon Electric Glass Co., Ltd .; ECS-03T-511, diameter 13 μm, cut length 3 mm, surface treatment with aminosilane and urethane sizing agent)
GF-2: Circular cross-section chopped glass fiber (Nittobo Co., Ltd. 3PE937, fiber diameter: 13 μm, cut length: 3 mm, aminosilane-treated surface treatment and epoxy / urethane sizing agent)

(C component)
PTFE: Polytetrafluoroethylene having a fibril forming ability (manufactured by Daikin Industries, Ltd .: Polyflon MPA FA500)
(D component)
FR-1: phosphate ester mainly composed of bisphenol A bis (diphenyl phosphate) (“CR-741” (trade name) manufactured by Daihachi Chemical Industry Co., Ltd., TGA 5% weight reduction temperature = 335.9 ° C.)
FR-2: resorcinol bis (dixylenyl phosphate) (“PX-200” (trade name) manufactured by Daihachi Chemical Industry Co., Ltd., TGA 5% weight reduction temperature = 351.0 ° C.)
FR-3: Potassium perfluorobutane sulfonate (Dainippon Ink Co., Ltd .: Megafac F-114P)

(E component)
(E-1 component)
GFL: Granular glass flakes (Fleka REFG-301 manufactured by Nippon Sheet Glass Co., Ltd., median average particle size 140 μm, thickness 5 μm, epoxy sizing agent by standard sieving method)
TALC: talc (manufactured by Hayashi Kasei Kogyo Co., Ltd .: Upn HS-T0.8, plate-like, average particle diameter 2 μm)
MICA: Mica (manufactured by Yamaguchi Mica Industry Co., Ltd .: A-41, plate-like, average particle diameter 40 μm)
(E-2 component)
MF: Milled fiber (PFE-301S manufactured by Nitto Boseki Co., Ltd., fiber diameter: 13 μm, cut length: 40 μm, surface treatment with aminosilane and epoxy / urethane sizing agent (others)
TMP: Phosphorous stabilizer (manufactured by Daihachi Chemical Industry Co., Ltd .: TMP)

  As is apparent from the above table, it can be seen that the flat panel display fixing frame of the present invention has good characteristics that cannot be achieved with other fillers or other composition ratios.

It is the surface side front schematic diagram of the liquid crystal display fixed frame molded article which was created in the Examples and used for evaluation. The molded article has a longitudinal length of 325 mm, a lateral length of 400 mm, and a diagonal length of the inner edge. Length: 423 mm (17 inches), edge height: 10 mm, frame width: 10 mm, main thickness around the gate portion: 1 mm, and area occupied by the frame portion: 19%. It is the back side front schematic diagram of the liquid crystal display fixed frame molded article which it created in the Example and used for evaluation. It is an enlarged view of the said back side, and a shaded part shows the surface of a back part.

Explanation of symbols

1 Liquid crystal display fixed frame molded product body 2 Upper gate (pin gate 1.0mmφ, 6 locations)
3 Upper LCD cell mounting surface (thickness 0.5mm)
4 Upper outer snap fit male part 5 Upper screw hole 6 Right part gate (Pin gate 1.0mmφ, 5 points, right part and left part are based on the direction from the surface side)
7 Right LCD cell mounting surface (thickness 0.5mm)
8 Right outer snap fit male part 9 Right inner snap fit male part 10 Lower gate (pin gate 1.0mmφ, 6 locations)
11 Lower liquid crystal cell mounting surface (thickness 0.5mm)
12 Lower outer snap fit male part 13 Lower screw hole 14 Left gate (pin gate 1.0mmφ, 5 locations)
15 Left LCD cell mounting surface (thickness 0.5mm)
16 Left outer snap fit male part 17 Left inner snap fit male part 18 Liquid crystal cell mounting surface cut-out part for surface smoothness measurement

Claims (15)

  Thermoplastic resin (component A) composed of an aromatic polycarbonate resin (component A-1) 40 to 99% by weight, the average value of the major axis of the fiber cross section is 10 to 50 μm, the ratio of major axis to minor axis (major axis / minor axis) A polycarbonate resin composition comprising 1 to 60% by weight of a flat cross-section glass fiber (B component) having an average value of 1.5 to 8, wherein the resin composition is used for a flat panel display fixing frame. Resin composition for flat panel display fixing frame. 1 to 1 styrene resin (A-2 component) with respect to 100 parts by weight of the A-1 component thermoplastic resin
The resin composition for a flat panel display fixing frame according to claim 1, comprising 00 parts by weight.   The resin composition for a flat panel display fixing frame according to claim 1 or 2, wherein the styrenic resin comprises one or more resins selected from the group consisting of polystyrene, ABS resin, AS resin, and HIPS resin.   The resin composition for a flat panel display fixing frame according to claim 2 or 3, wherein the component A contains 50% by weight or more of an aromatic polycarbonate resin.   The resin composition for a flat panel display fixing frame according to any one of claims 1 to 4, wherein the average value of the ratio of major axis to minor axis (major axis / minor axis) of component B-1 is 2.5 to 5.   The resin composition for a flat panel display fixing frame according to any one of claims 1 to 5, wherein a ratio (aspect ratio) of an average fiber length and an average fiber diameter of the component B-1 is 2 to 120.   The flat panel display according to any one of claims 1 to 6, comprising 0.01 to 0.6 parts by weight of a fluorine-containing anti-dripping agent (C component) with respect to 100 parts by weight of the total of A component and B component. Resin composition for fixed frame.   The resin composition for a flat panel display fixing frame according to any one of claims 1 to 7, comprising 0.01 to 20 parts by weight of a flame retardant (D component) with respect to 100 parts by weight of the total of A component and B component. object.   The resin composition for a flat panel display fixing frame according to any one of claims 1 to 8, wherein the D component is an organic phosphate ester flame retardant and / or an alkali (earth) metal salt of an organic sulfonate.   A compound that has a combustion rank of V-0 in the test piece between 0.8 and 1.6 mm thickness in the UL standard 94 vertical combustion test and in which a chlorine atom and a bromine atom are chemically bonded is blended. The resin composition for a flat panel display fixing frame according to any one of claims 1 to 9, wherein the resin composition is not.   At least one reinforcing filler (E component) selected from a plate-like inorganic filler (E-1 component) and a fibrous inorganic filler (E-2 component) with respect to a total of 100 parts by weight of component A and component B The resin composition for a flat panel display fixing frame according to any one of claims 1 to 10, comprising 1 to 50 parts by weight.   The resin composition for a flat panel display fixing frame according to claim 11, wherein the E-1 component is one or more plate-like inorganic fillers selected from the group consisting of glass flakes, mica, and talc.   The flat panel display fixed frame formed from the resin composition in any one of the said Claims 1-12.   14. The flat panel display fixing frame according to claim 13, wherein the short side is in the range of 200 to 800 mm and the long side is in the range of 300 to 1300 mm. A method of manufacturing a flat panel display fixing frame,
(I) Flat cross-section glass having an aromatic polycarbonate-based resin (component A) of 40 to 99% by weight, an average value of the major axis of the fiber cross section of 10 to 50 μm, and an average value of the ratio of the major axis to the minor axis of 1.5 to 8 A fiber (B component) is 1 to 60% by weight, and there is a thickness in which the combustion rank of the test piece is V-0 between 0.8 to 1.6 mm thickness in the vertical combustion test of UL standard 94, and A step of preparing a pellet made of a polycarbonate resin composition characterized by not containing a compound in which a chlorine atom and a bromine atom are chemically bonded (step-i),
(Ii) a step of injecting and filling the pellet into a mold cavity (step-ii), and (iii) a step of taking out a flat panel display fixing frame from the mold cavity (step-iii). Manufacturing method of flat panel display fixing frame.

Images