JP2010065164A - Aromatic polycarbonate resin composition and molded item and member for lighting including the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aromatic polycarbonate resin composition having excellent light-diffusing performance, flame retardancy, and flowability. <P>SOLUTION: The aromatic polycarbonate resin composition contains: 100 pts.wt. of an aromatic polycarbonate resin (A); 0.1-10 pts.wt. of a light-diffusing agent (B); 1.8-7.5 pts.wt. of a silicone resin (C), which contains 50 mol% or more of a unit represented by RSiO<SB>1.5</SB>(wherein R represents a monovalent 1C-12C hydrocarbon group) based on the total siloxane units (R<SB>0-3</SB>SiO<SB>2.0-0.5</SB>), and of which an aryl group in the total hydrocarbon group (R) contained accounts for 50 mol% or more; and 0.01-1 pts.wt. of an organic metal salt compound (D). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an aromatic polycarbonate resin composition. More specifically, the present invention relates to a light diffusing aromatic polycarbonate resin composition that has light diffusibility and is excellent in fluidity and flame retardancy, and a molded body comprising the same, and particularly relates to various lighting members.

  A molded article having a light diffusing function in which an aromatic polycarbonate resin is mixed with a light diffusing agent composed of inorganic fine particles or polymer fine particles is, for example, various lighting device covers such as lamp covers, housings, meters, signboards (particularly internal Lighting type), resin window glass, image reading device, light diffusion plate for display device (for example, light diffusion plate used for backlight module such as liquid crystal display device, screen for projection display device such as projector TV) It is used in a wide range of fields such as light diffusion plates, buttons of various devices, and switches). Such a molded body is advantageous in that it has excellent heat resistance, dimensional stability, and impact resistance as compared with conventional acrylic resins.

  However, in recent years, in the fields of electrical and electronic equipment, OA equipment, lighting devices, etc., flame retardancy is required for safety purposes to prevent the spread of fire in the event of a fire, and the above-mentioned light diffusibility is required. Products and components are no exception. Furthermore, as the products become lighter and thinner, the required level of flame retardancy is increasing.

  Also, in the field of light diffusion plates, lighting fixture covers, and the like, large diffusion plates by injection molding are actively studied from the viewpoint of increasing the size of parts and reducing costs. For this reason, the material used there is also required to have excellent fluidity.

  As a method for imparting flame retardancy to an aromatic polycarbonate resin, for example, a method using a flame retardant and a flame retardant aid such as halogen, phosphorus, silicone, inorganic, and metal salt has been tried. For example, silicone-based flame retardants are being investigated as safe and environmentally friendly flame retardants that do not generate harmful gases when a fire breaks out or incineration. As a specific example, Patent Document 1 proposes a resin composition for a light diffusing plate in which a silicone compound having a specific structure is blended with an aromatic polycarbonate resin blended with a light diffusing agent.

JP 2008-19405 A

  However, the composition described in Patent Document 1 has an insufficient level of flame retardancy and cannot withstand practical use. More specifically, in a test according to the standard UL94 of the US Underwriters Laboratories, the level at which V-0 could be obtained was not reached. For this reason, for example, when the composition described in Patent Document 1 is applied to a member such as an indoor lighting device, it is expected that the burned member will be dripped vigorously. It was.

  Furthermore, in the composition of patent document 1, the fluidity | liquidity of the composition was also inadequate. For this reason, there also existed the subject that it could not be used suitably for a thin molded object and a large sized molded object.

As described above, a resin composition having excellent light diffusibility, flame retardancy and fluidity as required in recent years has not yet been obtained, and a resin composition having such characteristics is strongly desired. It was.
The present invention was devised in view of the above problems, and includes an aromatic polycarbonate resin composition excellent in light diffusibility, flame retardancy, and fluidity, and a molded body and an illumination member formed by molding the same. The purpose is to provide.

  As a result of intensive studies in view of the above-described problems, the present inventors have formulated a light diffusing agent, an organometallic salt compound, and a silicone resin having a specific structure in a predetermined ratio with respect to the aromatic polycarbonate resin. The present inventors have found that excellent light diffusibility, flame retardancy and fluidity can be imparted without impairing the excellent mechanical properties, thermophysical properties, electrical properties, etc. of the aromatic polycarbonate resin, and have completed the present invention.

That is, the aromatic polycarbonate resin composition of the present invention comprises 100 parts by weight of an aromatic polycarbonate resin (A), 0.1 to 10 parts by weight of a light diffusing agent (B), and a unit represented by RSiO _1.5 (described above). In the formula, R represents a monovalent hydrocarbon group having 1 to 12 carbon atoms.) 50 mol% or more based on the entire siloxane unit (R _0-3 SiO _2.0-0.5 ), And 1.8 to 7.5 parts by weight of the silicone resin (C) in which the aryl group occupies 50 mol% or more of the total hydrocarbon group (R) contained, and 0.01 to 1 part by weight of the organometallic salt compound (D) Part.

At this time, the aromatic polycarbonate resin composition of the present invention preferably contains 0.01 to 1 part by weight of the fluoropolymer (E) with respect to 100 parts by weight of the aromatic polycarbonate resin (A).
Further, the aromatic polycarbonate resin (A) is composed of 80 to 10% by weight of the linear aromatic polycarbonate resin (A-1) and 20 to 90% by weight of the branched aromatic polycarbonate resin (A-2). preferable. Further, the branched aromatic polycarbonate resin (A-2) is preferably an aromatic polycarbonate resin obtained by a melt transesterification method.

Moreover, it is preferable that content of this silicone resin (C) is 1.8-5 weight part with respect to 100 weight part of this aromatic polycarbonate resin (A).
Moreover, it is preferable that the viscosity average molecular weights of this aromatic polycarbonate resin (A) are 14000-24000.
Furthermore, it is preferable that content of this light-diffusion agent (B) is 0.5-5 weight part with respect to 100 weight part of this aromatic polycarbonate resin (A).

Moreover, it is preferable that the aryl group of the silicone resin (C) is a phenyl group.
Further, the silicone resin (C) contains 80 mol% or more of the unit represented by RSiO _{1.5 based} on the total siloxane units (R _0-3 SiO _2.0-0.5 ), and It is preferable that it is a silicone resin in which aryl groups account for 80 mol% or more of all the hydrocarbon groups contained.

The organic acid metal salt compound (D) is preferably an alkali metal salt and / or an alkaline earth metal salt of a fluorine-containing alkyl sulfonic acid and / or an aromatic sulfonic acid.
Furthermore, the light diffusing agent (B) is preferably acrylic fine particles and / or silicone fine particles.

Moreover, it is preferable that the aromatic polycarbonate resin composition of this invention contains 0.01-3 weight part of ultraviolet absorbers (F) with respect to 100 weight part of this aromatic polycarbonate resin (A).
Furthermore, it is preferable that this ultraviolet absorber (F) is a benzotriazole compound and / or a triazine compound.

The molded article of the present invention is formed by molding the aromatic polycarbonate resin composition of the present invention.
The lighting member of the present invention is formed by molding the aromatic polycarbonate resin composition of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, the aromatic polycarbonate resin composition excellent in light diffusibility, a flame retardance, and fluidity | liquidity, and the molded object and the member for illumination which shape | mold it are realizable.

Hereinafter, the present invention will be described in detail with reference to embodiments and examples, but the present invention is not limited to the embodiments and examples described below, and may be arbitrarily selected without departing from the scope of the present invention. You can change it to
In the present specification, “to” is used to mean that the numerical values described before and after it are included as a lower limit value and an upper limit value. Further, the “group” of various compounds in the present specification may have a substituent without departing from the gist of the present invention.

[1. Overview]
The aromatic polycarbonate resin composition of the present invention contains an aromatic polycarbonate resin (A), a light diffusing agent (B), a silicone resin (C), and an organometallic salt compound (D). Moreover, it is preferable that the aromatic polycarbonate resin composition of this invention contains a fluoropolymer (E) and a ultraviolet absorber (F) further. Furthermore, the aromatic polycarbonate resin composition of the present invention may contain other components in addition to these unless the effects of the present invention are significantly impaired.
In addition, (A), (A-1), (A-2), (B), (C), (D), (E), and (A) attached to the end of the constituent components of the aromatic polycarbonate resin composition The code | symbol with F) is a code | symbol attached | subjected in order to distinguish each structural component clearly.

[2. Aromatic polycarbonate resin (A)]
Although there is no restriction | limiting in the specific kind of aromatic polycarbonate resin used for this invention, For example, the aromatic polycarbonate polymer formed by making an aromatic dihydroxy compound and a carbonate precursor react is mentioned. In this case, the aromatic polycarbonate polymer may be a homopolymer composed of one type of repeating unit or a copolymer having two or more types of repeating units. Usually, such an aromatic polycarbonate polymer becomes a thermoplastic resin.

The polymer chain of the aromatic polycarbonate resin may be linear or branched. Therefore, the aromatic polycarbonate resin composition of the present invention may contain a linear aromatic polycarbonate resin (A-1) as the aromatic polycarbonate resin, and the branched aromatic polycarbonate resin (A-2). It may be included, and may be included in combination of both. The linear aromatic polycarbonate resin is a linear aromatic polycarbonate resin having a high molecular structure as can be seen from its name, and usually has a structural viscosity index N of less than 1.2. Further, the branched aromatic polycarbonate resin is an aromatic polycarbonate resin having a branch in its polymer structure, and generally has a high structural viscosity index N of 1.2 or more. Here, the structural viscosity index N is a value described in, for example, “Shigeharu Onoki,“ Rheology for chemists ”, pages 15-16.
Especially, it is preferable that the aromatic polycarbonate resin composition of this invention contains at least a linear aromatic polycarbonate resin as an aromatic polycarbonate resin.

・ Linear aromatic polycarbonate resin (A-1)
Examples of aromatic dihydroxy compounds among monomers used as raw materials for linear aromatic polycarbonate resins include 2,2-bis (4-hydroxyphenyl) propane (that is, bisphenol A), 2,2-bis ( 3,5-dibromo-4-hydroxyphenyl) propane (ie, tetrabromobisphenol A), bis (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, 2,2-bis (4 -Hydroxyphenyl) butane, 2,2-bis (4-hydroxyphenyl) octane, 2,2-bis (4-hydroxy-3-methylphenyl) propane, 1,1-bis (3-tert-butyl-4- Hydroxyphenyl) propane, 2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane, 2,2-bis ( -Bromo-4-hydroxyphenyl) propane, 2,2-bis (3,5-dichloro-4-hydroxyphenyl) propane, 2,2-bis (3-phenyl-4-hydroxyphenyl) propane, 2,2- Bis (3-cyclohexyl-4-hydroxyphenyl) propane, 1,1-bis (4-hydroxyphenyl) -1-phenylethane, bis (4-hydroxyphenyl) diphenylmethane, 2,2-bis (4-hydroxyphenyl) -1,1,1-trichloropropane, 2,2-bis (4-hydroxyphenyl) -1,1,1,3,3,3-hexachloropropane, 2,2-bis (4-hydroxyphenyl) -1 Bis (hydroxyaryl) alkanes such as 1,1,3,3,3-hexafluoropropane;

Bis such as 1,1-bis (4-hydroxyphenyl) cyclopentane, 1,1-bis (4-hydroxyphenyl) cyclohexane, 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane (Hydroxyaryl) cycloalkanes;

Cardostructure-containing bisphenols such as 9,9-bis (4-hydroxyphenyl) fluorene, 9,9-bis (4-hydroxy-3-methylphenyl) fluorene;

Dihydroxy diaryl ethers such as 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxy-3,3'-dimethyldiphenyl ether;

Dihydroxy diaryl sulfides such as 4,4'-dihydroxydiphenyl sulfide, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfide;

Dihydroxydiaryl sulfoxides such as 4,4'-dihydroxydiphenyl sulfoxide, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfoxide;

Dihydroxydiaryl sulfones such as 4,4'-dihydroxydiphenyl sulfone, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfone;

Hydroquinone, resorcin, 4,4'-dihydroxydiphenyl and the like can be mentioned.

Among these, bis (4-hydroxyphenyl) alkanes are preferable, and 2,2-bis (4-hydroxyphenyl) propane (that is, bisphenol A) is particularly preferable from the viewpoint of impact resistance.
In addition, 1 type may be used for an aromatic dihydroxy compound and it may use 2 or more types together by arbitrary combinations and a ratio.

Of the monomers used as the raw material for the linear aromatic polycarbonate resin, carbonyl halides, carbonate esters, haloformates, and the like are used as examples of carbonate precursors. Specific examples include phosgene; diaryl carbonates such as diphenyl carbonate and ditolyl carbonate; dialkyl carbonates such as dimethyl carbonate and diethyl carbonate; and dihaloformates of dihydric phenols.
In addition, 1 type may be used for a carbonate precursor and it may use 2 or more types together by arbitrary combinations and a ratio.

-Manufacturing method of linear aromatic polycarbonate resin The manufacturing method of linear aromatic polycarbonate resin is not specifically limited, Arbitrary methods are employable. Examples thereof include an interfacial polymerization method, a melt transesterification method, a pyridine method, a ring-opening polymerization method of a cyclic carbonate compound, and a solid phase transesterification method of a prepolymer. Hereinafter, a particularly preferable one of these methods will be specifically described.

.. Interfacial polymerization method First, the case of producing a linear aromatic polycarbonate resin by the interfacial polymerization method will be described. In the interfacial polymerization method, in the presence of an organic solvent inert to the reaction and an aqueous alkali solution, the pH is usually kept at 9 or higher, and an aromatic dihydroxy compound and a carbonate precursor (preferably phosgene) are reacted and then polymerized. A linear aromatic polycarbonate resin is obtained by interfacial polymerization in the presence of a catalyst. In the reaction system, a molecular weight adjusting agent (terminal terminator) may be present if necessary, and an antioxidant may be present for preventing the oxidation of the aromatic dihydroxy compound.

  The aromatic dihydroxy compound and the carbonate precursor are as described above. Of the carbonate precursors, phosgene is preferably used, and a method using phosgene is particularly called a phosgene method.

  Examples of the organic solvent inert to the reaction include chlorinated hydrocarbons such as dichloromethane, 1,2-dichloroethane, chloroform, monochlorobenzene and dichlorobenzene; aromatic hydrocarbons such as benzene, toluene and xylene. It is done. In addition, 1 type may be used for an organic solvent and it may use 2 or more types together by arbitrary combinations and a ratio.

  Examples of the alkali compound contained in the alkaline aqueous solution include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide. In addition, 1 type may be used for an alkali compound and it may use 2 or more types together by arbitrary combinations and a ratio.

  Examples of the alkali compound contained in the alkaline aqueous solution include alkali metal compounds and alkaline earth metal compounds such as sodium hydroxide, potassium hydroxide, lithium hydroxide, and sodium hydrogen carbonate, among which sodium hydroxide and water Potassium oxide is preferred. In addition, an alkali compound may use 1 type and may use 2 or more types together by arbitrary combinations and a ratio.

  Although there is no restriction | limiting in the density | concentration of the alkali compound in aqueous alkali solution, Usually, in order to control pH in aqueous alkali solution of reaction to 10-12, it is used at 5 to 10 weight%. For example, when phosgene is blown, the molar ratio of the bisphenol compound and the alkali compound is usually 1: 1.9 or more in order to control the pH of the aqueous phase to be 10 to 12, preferably 10 to 11. Among these, it is preferable that the ratio is 1: 2.0 or more, usually 1: 3.2 or less, and more preferably 1: 2.5 or less.

  Examples of the polymerization catalyst include tertiary amines such as trimethylamine, triethylamine, tributylamine, tripropylamine, trihexylamine and pyridine; quaternary such as trimethylbenzylammonium chloride, tetramethylammonium chloride and triethylbenzylammonium chloride. Ammonium salt; and the like. In addition, 1 type may be used for a polymerization catalyst and it may use 2 or more types together by arbitrary combinations and a ratio.

  Examples of the molecular weight regulator include compounds having a monovalent phenolic hydroxyl group. Specific examples include m-methylphenol, p-methylphenol, m-propylphenol, p-propylphenol, p-tert-butylphenol, and p-long chain alkyl-substituted phenol. In addition, a molecular weight regulator may use 1 type and may use 2 or more types together by arbitrary combinations and a ratio.

  The usage-amount of a molecular weight regulator is 0.5 mol or more normally with respect to 100 mol of aromatic dihydroxy compounds, Preferably it is 1 mol or more, and is 50 mol or less normally, Preferably it is 30 mol or less. By making the usage-amount of a molecular weight modifier into this range, the thermal stability and hydrolysis resistance of an aromatic polycarbonate resin composition can be improved.

In the reaction, the order of mixing the reaction substrate, reaction medium, catalyst, additive and the like is arbitrary as long as the desired linear aromatic polycarbonate resin is obtained, and an appropriate order may be arbitrarily set. For example, when phosgene is used as the carbonate precursor, the molecular weight regulator can be mixed at any time as long as it is from the reaction (phosgenation) of the aromatic dihydroxy compound and phosgene to the start of the polymerization reaction. .
In addition, reaction temperature is 0-40 degreeC normally, and reaction time is normally several minutes (for example, 10 minutes)-several hours (for example, 6 hours).

.. Melt transesterification method Next, a case where a linear aromatic polycarbonate resin is produced by a melt transesterification method will be described. In the melt transesterification method, for example, a transesterification reaction between a carbonic acid diester and an aromatic dihydroxy compound is performed.

The aromatic dihydroxy compound is as described above.
On the other hand, examples of the carbonic acid diester include dialkyl carbonate compounds such as dimethyl carbonate, diethyl carbonate, and di-tert-butyl carbonate, diphenyl carbonate; substituted diphenyl carbonate such as ditolyl carbonate, and the like. Among these, diphenyl carbonate and substituted diphenyl carbonate are preferable, and diphenyl carbonate is more preferable. In addition, 1 type may be used for carbonic acid diester, and it may use 2 or more types together by arbitrary combinations and a ratio.

  The ratio of the aromatic dihydroxy compound and the carbonic acid diester is arbitrary as long as the desired linear aromatic polycarbonate resin can be obtained, but the molar amount of the carbonic acid diester should be used in an equimolar amount or more with respect to 1 mol of the aromatic dihydroxy compound. Among them, it is more preferable to use 1.01 mol or more. The upper limit is usually 1.30 mol or less. By setting it as such a range, the amount of terminal hydroxyl groups can be adjusted to a suitable range.

  In an aromatic polycarbonate resin, the amount of terminal hydroxyl groups tends to have a great influence on thermal stability, hydrolysis stability, color tone, and the like. For this reason, you may adjust the amount of terminal hydroxyl groups as needed by a well-known arbitrary method. In the melt transesterification reaction, a linear aromatic polycarbonate resin in which the amount of terminal hydroxyl groups is adjusted is usually obtained by adjusting the mixing ratio of the carbonic diester and the aromatic dihydroxy compound; the degree of vacuum during the transesterification reaction, etc. be able to. In addition, the molecular weight of the linear aromatic polycarbonate resin obtained normally can also be adjusted by this operation.

When adjusting the amount of terminal hydroxyl groups by adjusting the mixing ratio of the carbonic acid diester and the aromatic dihydroxy compound, the mixing ratio is as described above.
Further, as a more aggressive adjustment method, there may be mentioned a method in which a terminal terminator is mixed separately during the reaction. Examples of the terminal terminator at this time include monohydric phenols, monovalent carboxylic acids, carbonic acid diesters, and the like. In addition, 1 type may be used for a terminal terminator and it may use 2 or more types together by arbitrary combinations and a ratio.

  When producing a linear aromatic polycarbonate resin by the melt transesterification method, a transesterification catalyst is usually used. Any transesterification catalyst can be used. Among these, for example, it is preferable to use an alkali metal compound and / or an alkaline earth metal compound. In addition, auxiliary compounds such as basic boron compounds, basic phosphorus compounds, basic ammonium compounds, and amine compounds may be used in combination. In addition, 1 type may be used for a transesterification catalyst and it may use 2 or more types together by arbitrary combinations and a ratio.

  In the melt transesterification method, the reaction temperature is usually 100 to 320 ° C. The pressure during the reaction is usually a reduced pressure condition of 2 mmHg or less. As a specific operation, a melt polycondensation reaction may be performed under the above-mentioned conditions while removing a by-product such as an aromatic hydroxy compound.

  The melt polycondensation reaction can be performed by either a batch method or a continuous method. When performing in a batch system, the order of mixing the reaction substrate, reaction medium, catalyst, additive, etc. is arbitrary as long as the desired linear aromatic polycarbonate resin is obtained, and an appropriate order may be set arbitrarily. . Of these, the melt polycondensation reaction is preferably carried out in a continuous manner in consideration of the stability of the linear aromatic polycarbonate resin and the aromatic polycarbonate resin composition.

  In the melt transesterification method, a catalyst deactivator may be used as necessary. As the catalyst deactivator, a compound that neutralizes the transesterification catalyst can be arbitrarily used. Examples thereof include sulfur-containing acidic compounds and derivatives thereof. In addition, a catalyst deactivator may use 1 type and may use 2 or more types together by arbitrary combinations and a ratio.

  The amount of the catalyst deactivator used is usually 0.5 equivalents or more, preferably 1 equivalent or more, and usually 10 equivalents or less, relative to the alkali metal or alkaline earth metal contained in the transesterification catalyst. Preferably it is 5 equivalents or less. Furthermore, it is 1 ppm or more normally with respect to a linear aromatic polycarbonate resin, and is 100 ppm or less normally, Preferably it is 20 ppm or less.

・ Branched aromatic polycarbonate resin (A-2)
The aromatic polycarbonate resin composition of the present invention may contain a branched aromatic polycarbonate resin. The branched aromatic polycarbonate resin functions as an anti-dripping agent and can suppress dripping of the resin ignited and melted during the combustion of the aromatic polycarbonate resin composition of the present invention.

As the monomer of the branched aromatic polycarbonate resin, for example, those described in the section of the linear aromatic polycarbonate resin (A-1) can be used similarly.
Moreover, there is no restriction | limiting in particular in the manufacturing method of branched aromatic polycarbonate resin, A well-known arbitrary manufacturing method can be used. Specific examples include the methods described in JP-A-8-259687, JP-A-8-245782, and the like. In the methods described in these documents, when the aromatic dihydroxy compound and the carbonic acid diester are reacted by the melt transesterification method, the structural viscosity is selected without using a branching agent by selecting the catalyst conditions or production conditions. A branched aromatic polycarbonate resin having a high index N and excellent hydrolytic stability can be obtained.

  As another method, in addition to the above-mentioned aromatic dihydroxy compound and carbonate precursor, a trifunctional or higher polyfunctional aromatic compound is used, and these are copolymerized by the above-described interfacial polymerization method or melt transesterification method. The method of doing is mentioned.

  Examples of the trifunctional or higher polyfunctional aromatic compound include phloroglucin, 4,6-dimethyl-2,4,6-tri (4-hydroxyphenyl) heptene-2, 4,6-dimethyl-2,4, 6-tri (4-hydroxyphenyl) heptane, 2,6-dimethyl-2,4,6-tri (4-hydroxyphenyl) heptene-3, 1,3,5-tri (4-hydroxyphenyl) benzene, Polyhydroxy compounds such as 1,1,1-tri (4-hydroxyphenyl) ethane;

3,3-bis (4-hydroxyaryl) oxindole (that is, isatin bisphenol), 5-chloroisatin, 5,7-dichloroisatin, 5-bromoisatin and the like. Of these, 1,1,1-tri (4-hydroxyphenyl) ethane is preferred.
In addition, a polyfunctional aromatic compound may use 1 type and may use 2 or more types together by arbitrary combinations and a ratio.

  A polyfunctional aromatic compound can be used by substituting a part of the aromatic dihydroxy compound. The amount of the polyfunctional aromatic compound used is usually 0.01 mol% or more, preferably 0.1 mol% or more, and usually 10 mol% or less, preferably 3 mol% or less, based on the aromatic dihydroxy compound. It is.

Examples of the branched structure contained in the branched aromatic polycarbonate resin obtained by the melt transesterification method include structures of the following formulas (1) to (4). In the following formulas (1) to (4), X is a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, or 5 carbon atoms. 15 cycloalkylidene group or,, -O -, - S - , - CO -, - SO -, - SO 2 - a divalent group selected from the group consisting of groups represented by.

  As described above, the branched aromatic polycarbonate resin according to the present invention usually has a structural viscosity index N of 1.2 or more. It is preferable to use a branched aromatic polycarbonate resin having a high structural viscosity index N in this manner because the dripping prevention effect (an effect of preventing dripping of a molten resin ignited during combustion) is increased.

In addition, the branched aromatic polycarbonate resin according to the present invention is usually the same as the linear aromatic polycarbonate resin in matters other than those described above.
For example, the branched aromatic polycarbonate resin may be either monopolymerization or copolymerization, and is usually a thermoplastic resin.

  The branched aromatic polycarbonate resin according to the present invention may be contained in the aromatic polycarbonate resin composition of the present invention only with the branched aromatic polycarbonate resin, but in combination with the linear aromatic polycarbonate resin of the present invention. It is preferable to make it contain in an aromatic polycarbonate resin composition. When contained in combination, the content of the linear aromatic polycarbonate resin is usually 80% by weight or less, preferably 50% by weight or less, more preferably 40% by weight or less, based on 100% by weight of the entire aromatic polycarbonate resin. In addition, it is usually 10% by weight or more, preferably 15% by weight or more. On the other hand, the content of the branched aromatic polycarbonate resin is usually 20% by weight or more, preferably 50% by weight or more, more preferably 60% by weight or more, and usually 90% by weight or less, preferably 85% by weight or less. . If the amount of the branched aromatic polycarbonate resin is too small, it is difficult to obtain the dripping prevention effect. Conversely, if the amount is too large, the fluidity of the aromatic polycarbonate resin composition tends to be extremely lowered.

-Other matters regarding the aromatic polycarbonate resin The molecular weight of the aromatic polycarbonate resin according to the present invention is arbitrary and may be appropriately selected and determined, but the viscosity average molecular weight [Mv] converted from the solution viscosity is usually 10,000 or more. It is preferably 12000 or more, more preferably 14000 or more, particularly preferably 14500 or more, and usually 40000 or less, preferably 30000 or less, more preferably 24000 or less, and particularly preferably 23000 or less. By making the viscosity average molecular weight more than the lower limit of the above range, the mechanical strength of the aromatic polycarbonate resin composition of the present invention can be further improved, and more preferable when used for applications requiring high mechanical strength. Become. On the other hand, by making the viscosity average molecular weight not more than the upper limit of the above range, it is possible to suppress and improve the fluidity reduction of the aromatic polycarbonate resin composition of the present invention, so that the molding processability can be improved and the molding process can be easily performed. Become. Two or more kinds of aromatic polycarbonate resins having different viscosity average molecular weights may be mixed and used. In this case, an aromatic polycarbonate resin having a viscosity average molecular weight outside the above preferred range may be mixed. Good.

The viscosity average molecular weight [Mv] is obtained by using methylene chloride as a solvent and obtaining an intrinsic viscosity [η] (unit: dl / g) at a temperature of 20 ° C. using an Ubbelohde viscometer. , Η = 1.23 × 10 ⁻⁴ Mv ^0.83 . The intrinsic viscosity [η] is a value calculated from the following equation by measuring the specific viscosity [ηsp] at each solution concentration [C] (g / dl).

  The terminal hydroxyl group concentration of the aromatic polycarbonate resin according to the present invention is arbitrary, and may be appropriately selected and determined, but is usually 1000 ppm or less, preferably 800 ppm or less, more preferably 600 ppm or less. Thereby, the residence heat stability and color tone of the aromatic polycarbonate resin composition of the present invention can be further improved. Further, the lower limit is usually 10 ppm or more, preferably 30 ppm or more, more preferably 40 ppm or more, particularly in an aromatic polycarbonate resin produced by a transesterification method. Thereby, a molecular weight fall can be suppressed and the mechanical characteristic of the aromatic polycarbonate resin composition of this invention can be improved more.

  The unit of the terminal hydroxyl group concentration is the weight of the terminal hydroxyl group expressed in ppm relative to the weight of the aromatic polycarbonate resin. The measurement method is colorimetric determination (method described in Macromol. Chem. 88 215 (1965)) by the titanium tetrachloride / acetic acid method.

  The aromatic polycarbonate resin according to the present invention is not limited to an aromatic polycarbonate resin alone (the aromatic polycarbonate resin alone is not limited to an embodiment containing only one type of aromatic polycarbonate resin. For example, a plurality of monomer compositions and molecular weights different from each other are used. It may be used in the meaning including an embodiment including a kind of aromatic polycarbonate resin.) Or an alloy (mixture) of an aromatic polycarbonate resin and another thermoplastic resin may be used in combination. Furthermore, for example, for the purpose of further increasing the flame retardancy, the aromatic polycarbonate resin may be configured as a copolymer mainly composed of an aromatic polycarbonate resin, such as a copolymer with an oligomer or polymer having a siloxane structure. Good.

  In addition, the aromatic polycarbonate resin may contain an aromatic polycarbonate oligomer in order to improve the appearance and fluidity of the molded body. The viscosity average molecular weight [Mv] of the aromatic polycarbonate oligomer is usually 1500 or more, preferably 2000 or more, and usually 9500 or less, preferably 9000 or less. Furthermore, the aromatic polycarbonate ligomer contained is preferably 30% by weight or less of the aromatic polycarbonate resin (including the aromatic polycarbonate oligomer).

Furthermore, the aromatic polycarbonate resin according to the present invention may be not only a virgin raw material but also an aromatic polycarbonate resin regenerated from a used product (so-called material recycled aromatic polycarbonate resin). Examples of the used products include optical recording media such as optical disks, light guide plates, vehicle window glass, vehicle headlamp lenses, windshields and other vehicle transparent members, water bottle containers, glasses lenses, sound barriers, Examples include building materials such as glass windows and corrugated sheets. Also, non-conforming products, pulverized products obtained from sprues, runners, etc., or pellets obtained by melting them can be used.
However, the regenerated aromatic polycarbonate resin is preferably 80% by weight or less of the aromatic polycarbonate resin contained in the aromatic polycarbonate resin composition of the present invention, and more preferably 50% by weight or less. preferable. The regenerated aromatic polycarbonate resin is likely to have been subjected to deterioration such as heat deterioration and aging deterioration, so when such an aromatic polycarbonate resin is used more than the above range, the hue and mechanical properties are not improved. This is because there is a possibility of lowering.

[3. Light diffusing agent (B)]
The aromatic polycarbonate resin composition of the present invention contains a light diffusing agent. Thus, by containing a light diffusing agent, the light diffusibility of the aromatic polycarbonate resin composition of the present invention and a molded article formed by molding the same can be enhanced.

  Examples of the light diffusing agent include inorganic fine particles such as barium sulfate, talc, calcium carbonate, silica, and glass; organic fine particles such as acrylic resin, silicone resin, benzoguanamine resin, styrene resin, and butadiene resin. . In particular, organic fine particles are preferable, and among them, acrylic fine particles and / or silicone fine particles are more preferable.

  As the organic fine particles, organic fine particles having a crosslinked structure in which main chains constituting the organic polymer are crosslinked are preferable. Especially, what can maintain a fine particle state without deform | transforming practically in the process of the aromatic polycarbonate resin composition of this invention, for example at the time of injection molding, is preferable.

  From the above viewpoint, the light diffusing agent does not substantially melt in the aromatic polycarbonate resin even when heated to the molding temperature (for example, 350 ° C.) of the relatively low molecular weight aromatic polycarbonate resin used in the present invention. Fine particles are preferred. Examples of such fine particles include crosslinked acrylic resins (crosslinked acrylic fine particles) and silicone resin fine particles (crosslinked silicone fine particles). In particular, polymer microparticles based on partially cross-linked methyl methacrylate and having a poly (butyl acrylate) core and a poly (methyl methacrylate) shell, or a rubbery vinyl polymer core Polymer fine particles having a core / shell monoholgy including a shell and a shell are preferred.

  The light diffusing agent is preferably one having a refractive index difference (Δn) of 0.01 or more from the aromatic polycarbonate resin from the viewpoint of light diffusibility. In addition, a light diffusing agent is used to sufficiently exhibit light diffusibility, for example, to suppress problems such as a light source behind a molded body (such as a light diffusing plate) being seen through, and to exhibit sufficient luminance. The difference in refractive index from the aromatic polycarbonate resin is more preferably 0.05 or more, and particularly preferably 0.07 or more.

  The aromatic polycarbonate resin used in the present invention is preferably, for example, an aromatic polycarbonate resin using bisphenol A as a raw material, and the refractive index in that case is usually 1.58. Therefore, as the light diffusing agent, it is preferable to use a light diffusing agent having a refractive index difference equal to or more than the above range.

  Here, the refractive index is a value for the d-line (587.562 nm, He) at a temperature of 25 ° C. The actual measurement is performed as follows. That is, the refractive index (npc) of the aromatic polycarbonate resin is determined by the V block method (type KPR, manufactured by Kalnew Optical Co., Ltd.), and the refractive index (nld) of the light diffusing agent is determined by the Becke method (method compared with the standard solution). To do.

  Further, the light diffusing agent is preferably incompatible with the aromatic polycarbonate resin from the viewpoint of light diffusibility.

  The weight average particle size of the light diffusing agent is usually 0.7 μm or more, preferably 1 μm or more, more preferably 2 μm or more, and usually 30 μm or less, preferably 20 μm or less, more preferably 10 μm or less. If the weight average particle size is too small, the light diffusibility of the resulting aromatic polycarbonate resin composition is inferior, and when used as a lighting fixture member, diffusion plate, etc., the light source tends to be seen through or the visibility tends to be inferior. Yes, if too large, the diffusion effect on the content may be low

  In addition, 1 type may be used for a light-diffusion agent and it may use 2 or more types together by arbitrary combinations and a ratio.

  The content of the light diffusing agent in the aromatic polycarbonate resin composition of the present invention is usually 0.1 parts by weight or more, preferably 0.5 parts by weight or more, and usually 10 parts by weight with respect to 100 parts by weight of the aromatic polycarbonate resin. It is 5 parts by weight or less, preferably 5 parts by weight or less. When the content of the light diffusing agent is too small, the light diffusibility of the molded article of the present invention is insufficient, and the light source may be seen through when used as a lighting fixture member, a diffusing plate or the like. On the other hand, when the amount is too large, the light transmittance of the molded article of the present invention is lowered, and the luminance may be excessively lowered when used as a lighting fixture member, a diffusion plate or the like.

[4. Silicone resin (C)]
The aromatic polycarbonate resin composition of the present invention contains a predetermined amount of a predetermined silicone resin. This silicone resin acts as a fluidizing agent, and acts as a flame retardant that imparts a high degree of flame retardancy to the aromatic polycarbonate resin composition when used in combination with an organometallic salt compound described below. is there. The flame retardant mechanism is that when a silicone resin and an organometallic salt compound are contained in an aromatic polycarbonate resin composition, the silicone resin is vaporized and a large number of fine bubbles are generated in the aromatic polycarbonate resin composition due to foaming. It is assumed that the aromatic polycarbonate resin composition is difficult to burn.

However, usually, the amount of the silicone resin in the aromatic polycarbonate resin composition has been suppressed to a very small amount. This is considered to be because when the amount of the silicone resin increases, the vaporized silicone resin itself burns, and rather reduces the flame retardancy.
However, according to the study of the present inventor, when the amount of the silicone resin is within a certain low concentration range, as described above, the flame retardancy decreases when the amount of the silicone resin increases, but more than that range. Surprisingly, it has been found that when many silicone resins are contained, flame retardancy is improved. This is presumably because the vaporization action of the silicone resin and the surface hardening action due to the Si—C formation reaction were significantly accelerated. Therefore, the aromatic polycarbonate resin composition of the present invention containing a larger amount of silicone resin than before can exhibit high flame retardancy.

The silicone resin according to the present invention has a T unit represented by RSiO _1.5 as an essential component, and (i) the T unit is an entire siloxane unit (R _0-3 SiO _{2.0-0. 5} ), the aryl group occupies a predetermined concentration or more, and (ii) among all the hydrocarbon groups (R) contained, the aryl group occupies a predetermined concentration or more. In addition to the T unit, the silicone resin according to the present invention includes an M unit represented by R ₃ SiO _0.5 , a D unit represented by R ₂ SiO _1.0 , and SiO _2.0 . Containing the Q unit represented may be used as long as the object of the present invention is not impaired.
Hereinafter, the configuration of the silicone resin will be described in detail.

  Silicone (polyorganosiloxane) has the following four units (that is, M unit represented by formula (5), D unit represented by formula (6), T unit represented by formula (7), And one or more repeating units selected from the group consisting of Q units represented by formula (8). Among these, silicone resins generally indicate those containing T units and / or Q units.

In the above formulas (5) to (8), R represents a monovalent hydrocarbon group having 1 to 12 carbon atoms. Each R may be the same or different.
Among them, the R is at least one selected from the group consisting of an alkyl group having 1 to 12 carbon atoms, an alkenyl group having 2 to 12 carbon atoms, and an aryl group having 6 to 12 carbon atoms. The hydrocarbon group is preferably. Examples of the alkyl group having 1 to 12 carbon atoms include methyl group, ethyl group, n-propyl group, isopropyl group, butyl group, hexyl group, octyl group, dodecyl group, and the like. Particularly preferred. Examples of the alkenyl group having 2 to 12 carbon atoms include vinyl group, butenyl group, allyl group and the like. Examples of the aryl group having 6 to 12 carbon atoms include a phenyl group, a biphenyl group, a naphthyl group, a tolyl group, and the like. Among these, a phenyl group is particularly preferable from the viewpoint of safety and industrial availability.

  The silicone resin according to the present invention is usually at least 50 mol%, preferably 60 mol, of the total hydrocarbon groups (that is, R) of each repeating unit such as M unit, D unit, T unit and Q unit described above. % Or more, more preferably 70 mol% or more, still more preferably 80 mol% or more, particularly preferably 100 mol% is occupied by the aryl group. This is because when the content of the aryl group is less than the above range, the compatibility of the silicone resin with the aromatic polycarbonate resin is lowered and the flame retardancy may be inferior. Especially, it is more preferable that a phenyl group is included in the said ratio as said aryl group.

Further, silicone resin according to the present invention, the T-unit, with respect to the total siloxane units _{(R 0~3 SiO 2.0~0.5),} usually 50 mol% or more, preferably 60 mol% or more More preferably, it contains 80 mol% or more, and 100 mol% is particularly preferable. This means that the proportion of the T units in the repeating units such as M units, D units, T units, and Q units constituting the silicone resin is equal to or higher than a predetermined concentration. When the content of the T unit is less than the predetermined range, the heat resistance of the silicone resin itself is extremely lowered, and further, the dispersibility in the aromatic polycarbonate resin is inferior, so that high flame retardancy tends to be hardly obtained. .

The silicone resin according to the present invention may contain a silanol group or an alkoxy group in the side chain and / or the terminal. The content is arbitrary and may be appropriately selected and determined, but is usually 1.0 part by weight or more, preferably 3.5 parts by weight or more, more preferably 5 parts by weight or more, and usually 10 parts by weight or less. , Preferably 9 parts by weight or less, more preferably 8 parts by weight or less. Thereby, a flame retardance may be able to be improved.
Examples of the alkoxy group include a methoxy group, an ethoxy group, a propoxy group, a butoxy group, and a phenoxy group, and among them, a methoxy group is preferable.

  The weight average molecular weight of the silicone resin according to the present invention is arbitrary and may be appropriately selected and determined, but is usually 500 or more, preferably 750 or more, more preferably 1000 or more, further preferably 1500 or more, and usually 500,000. In the following, it is preferably 300,000 or less, more preferably 100,000 or less, still more preferably 20000 or less, and particularly preferably 10,000 or less. If the weight average molecular weight is less than the lower limit of the above range, the heat resistance of the silicone resin itself is too low, so that it is difficult to obtain a flame retardant effect. May cause. Also, if the weight average molecular weight exceeds the upper limit of the above range, the melt viscosity of the silicone resin is too high, the kneadability with the aromatic polycarbonate resin is reduced, causing poor dispersion, flame retardancy, mechanical properties, etc. There is a possibility of extreme reduction. On the other hand, by making a weight average molecular weight into the said range, the said concern can be eliminated, and it exists in the tendency for the fluidity | liquidity of the aromatic polycarbonate resin composition obtained to improve. The weight average molecular weight is usually measured by GPC (gel permeation chromatograph).

  In addition, 1 type may be used for a silicone resin and it may use 2 or more types together by arbitrary combinations and a ratio.

  The content of the silicone resin in the aromatic polycarbonate resin composition of the present invention is usually 1.8 parts by weight or more, preferably 1.9 parts by weight or more, more preferably 2 parts by weight with respect to 100 parts by weight of the aromatic polycarbonate resin. The amount is usually 7.5 parts by weight or less, preferably 5 parts by weight or less, more preferably 4.5 parts by weight or less. By including a large amount of the silicone resin in this way, it is possible to further improve the flame retardancy and improve the fluidity of the aromatic polycarbonate resin composition of the present invention as described above. Moreover, if the content of the silicone resin is too small, the flame retardant property of the aromatic polycarbonate resin composition of the present invention may be insufficient. The mechanical strength and thermal stability may be reduced.

[5. Organometallic salt compound (D)]
The aromatic polycarbonate resin composition of the present invention contains an organometallic salt compound. Here, the organic metal salt compound is a metal salt compound of an organic acid. Thus, the flame retardance of the aromatic polycarbonate resin composition of this invention can be improved by containing an organometallic salt compound.
As a kind of metal which an organometallic salt compound has, it is preferable that they are an alkali gold electrode or an alkaline-earth metal. The aromatic polycarbonate resin composition of the present invention can promote carbonization at the time of combustion to further increase flame retardancy, and mechanical properties such as impact resistance, heat resistance, electrical characteristics, etc. possessed by the aromatic polycarbonate resin. This is because the properties of can be maintained well. Accordingly, the organometallic salt compound according to the present invention is preferably at least one organometallic salt compound selected from the group consisting of alkali metal salts and alkaline earth metal salts, and more preferably alkali metal salts.

  Examples of the organic metal salt compound include an organic sulfonic acid metal salt compound, an organic carboxylic acid metal salt compound, an organic boric acid metal salt compound, and an organic phosphoric acid metal salt compound. Of these, organic sulfonic acid metal salts are preferred from the viewpoint of thermal stability when mixed with an aromatic polycarbonate resin.

  Examples of organic sulfonic acid metal salt compounds include organic lithium sulfonate (Li) salt compounds, organic sodium sulfonate (Na) salt compounds, organic potassium sulfonate (K) salt compounds, and organic sulfonic acids. Rubidium (Rb) salt compound, organic cesium sulfonate (Cs) salt compound, organic magnesium sulfonate (Mg) salt compound, organic calcium sulfonate (Ca) salt compound, organic strontium sulfonate (Sr) salt compound And organic barium sulfonate (Ba) salt compounds. Of these, organic sodium sulfonate (Na) salt compounds, organic potassium sulfonate (K) salt compounds, organic cesium (Cs) salt compounds, and the like are particularly preferable.

  Specific examples of the organic metal salt compound include diphenylsulfone-3,3′-disulfonic acid, diphenylsulfone-3-sulfonic acid, benzenesulfonic acid, (poly) styrenesulfonic acid, paratoluenesulfonic acid, and (branched) dodecyl. Aromatic sulfonic acid such as benzene sulfonic acid and trichlorobenzene sulfonic acid; hydrogen atom of alkyl sulfonic acid such as trifluoromethane sulfonic acid, perfluoroethane sulfonic acid, perfluoropropane sulfonic acid, perfluorobutane sulfonic acid is replaced with fluorine atom And alkali and / or alkaline earth metal salts such as fluorine-containing alkylsulfonic acid having the above structure.

Among them, diphenylsulfone-3,3′-disulfonate potassium, diphenylsulfone-3-sulfonate potassium, sodium benzenesulfonate, sodium (poly) styrenesulfonate, sodium paratoluenesulfonate, (branched) dodecylbenzene Sodium sulfonate, sodium trichlorobenzenesulfonate, sodium perfluorobutanesulfonate, potassium benzenesulfonate, potassium styrenesulfonate, potassium (poly) styrenesulfonate, potassium paratoluenesulfonate, (branched) potassium dodecylbenzenesulfonate, Potassium trichlorobenzenesulfonate, potassium perfluorobutanesulfonate, cesium benzenesulfonate, cesium (poly) styrenesulfonate, paratoluenesulfo Examples include cesium acid, cesium (branched) dodecylbenzene sulfonate, cesium trichlorobenzene sulfonate, cesium perfluorobutane sulfonate, and the like.
Among these, diphenylsulfone-3,3′-disulfonate dipotassium, diphenylsulfone-3-sulfonate potassium, sodium paratoluenesulfonate, potassium paratoluenesulfonate, and potassium perfluorobutanesulfonate are particularly preferable.
In addition, 1 type may contain the organometallic salt compound, and 2 or more types may contain it by arbitrary combinations and a ratio.

  The content of the organometallic salt compound in the aromatic polycarbonate resin composition of the present invention is usually 0.01 parts by weight or more, preferably 0.05 parts by weight or more, more preferably 100 parts by weight of the aromatic polycarbonate resin. 0.075 part by weight or more, particularly preferably 0.1 part by weight or more, usually 1 part by weight or less, preferably 0.75 part by weight or less, more preferably 0.5 part by weight or less, particularly preferably 0.4 part by weight. Less than parts by weight. If the amount of the organic metal salt compound is too small, the flame retardancy may be insufficient. If the amount is too large, the appearance of the molded article of the aromatic polycarbonate resin composition may be poor and the mechanical strength may be decreased.

[6. Fluoropolymer (E)]
The aromatic polycarbonate resin composition of the present invention preferably contains a fluoropolymer. The fluoropolymer functions as an anti-dripping agent. By containing the fluoropolymer in this way, it is possible to suppress dripping of the resin that has been ignited and melted during combustion of the aromatic polycarbonate resin composition of the present invention.

As the fluoropolymer, a known polymer having fluorine can be arbitrarily selected and used, and among these, a fluoroolefin resin is preferable.
As fluoroolefin resin, the polymer and copolymer containing a fluoroethylene structure are mentioned, for example. Specific examples thereof include difluoroethylene resin, tetrafluoroethylene resin, tetrafluoroethylene / hexafluoropropylene copolymer resin, and the like. Of these, tetrafluoroethylene resin and the like are preferable. As this fluoroethylene resin, a fluoroethylene resin having a fibril forming ability is preferable.

Examples of the fluoroethylene resin having a fibril-forming ability include Teflon (registered trademark) 6J manufactured by Mitsui / Dupont Fluorochemicals, Polyflon F201L, Polyflon F103 manufactured by Daikin Chemical Industries, and the like.
Examples of the aqueous dispersion of fluoroethylene resin include Teflon (registered trademark) 30J manufactured by Mitsui DuPont Fluorochemical Co., Ltd. and Fullon D-1 manufactured by Daikin Chemical Industries, Ltd.
Furthermore, a fluoroethylene polymer having a multilayer structure formed by polymerizing vinyl monomers can also be used as the fluoropolymer. Specific examples thereof include METABRENE A-3800 manufactured by Mitsubishi Rayon Co., Ltd.

  The content of the fluoropolymer in the aromatic polycarbonate resin composition of the present invention is a range in which sufficient flame retardancy (anti-dripping performance) is obtained and the light diffusibility and fluidity are not extremely lowered. Although there is no restriction | limiting in specific fluoropolymer content, Usually 0.01 weight part or more with respect to 100 weight part of aromatic polycarbonate resin, Preferably it is 0.05 weight part or more, More preferably, it is 0.075 weight part. Above, particularly preferably 0.1 parts by weight or more, usually 1 part by weight or less, preferably 0.75 parts by weight or less, more preferably 0.5 parts by weight or less, particularly preferably 0.4 parts by weight or less. . If the content of the fluoropolymer is too small, it is difficult to obtain the dripping prevention effect. Conversely, if the content is too large, the appearance of the molded article of the present invention may be deteriorated or the mechanical properties may be lowered.

  By the way, when the aromatic polycarbonate resin mentioned above has a fluorine, the said aromatic polycarbonate resin functions not only as an aromatic polycarbonate resin based on this invention but as a fluoropolymer. In this case, the aromatic polycarbonate resin having fluorine is handled as an aromatic polycarbonate resin and a fluoropolymer in the calculation of the content of the fluoropolymer described above.

In addition, 1 type may be used for a fluoropolymer and it may use 2 or more types together by arbitrary combinations and a ratio.
Furthermore, the aromatic polycarbonate resin composition of this invention may contain the component which acts as a dripping inhibitor other than a fluoropolymer. When the example is given, a thermosetting resin etc. will be mentioned.

[7. UV absorber (F)]
The aromatic polycarbonate resin composition of the present invention preferably contains an ultraviolet absorber. Thus, by containing an ultraviolet absorber, the weather resistance and light resistance of the aromatic polycarbonate resin composition of the present invention are improved, and the durability when the molded article of the present invention is used as a product member is improved. be able to.

  Examples of ultraviolet absorbers include inorganic ultraviolet absorbers such as cerium oxide and zinc oxide; organics such as benzotriazole compounds, benzophenone compounds, salicylate compounds, cyanoacrylate compounds, triazine compounds, oxanilide compounds, malonic ester compounds, and hindered amine compounds. Examples include ultraviolet absorbers. Of these, organic ultraviolet absorbers are preferred. In particular, benzotriazole compounds and triazine compounds are more preferable, and benzotriazole compounds are particularly preferable.

  Specific examples of the benzotriazole compound include 2- (2′-hydroxy-5′-methylphenyl) benzotriazole and 2- [2′-hydroxy-3 ′, 5′-bis (α, α-dimethylbenzyl) phenyl. ] -Benzotriazole, 2- (2'-hydroxy-3 ', 5'-di-tert-butyl-phenyl) -benzotriazole, 2- (2'-hydroxy-3'-tert-butyl-5'-methyl) Phenyl) -5-chlorobenzotriazole, 2- (2′-hydroxy-3 ′, 5′-di-tert-butyl-phenyl) -5-chlorobenzotriazole), 2- (2′-hydroxy-3 ′, 5'-di-tert-amyl) -benzotriazole, 2- (2'-hydroxy-5'-tert-octylphenyl) benzotriazole, 2,2 ' -Methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2N-benzotriazol-2-yl) phenol] and the like. Among them, 2- (2′-hydroxy-5′-tert-octylphenyl) benzotriazole, 2,2′-methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2N-benzotriazole) 2-yl) phenol] is preferred, and 2- (2′-hydroxy-5′-tert-octylphenyl) benzotriazole is particularly preferred. Specific examples of such benzotriazole compounds include “Seasorb 701”, “Seesorb 705”, “Seesorb 703”, “Seesorb 702”, “Seesorb 704” and “Seesorb 704” manufactured by Sipro Kasei Co., Ltd. Seasorb 709, “Biosorb 520”, “Biosorb 582”, “Biosorb 580”, “Biosorb 583” manufactured by Kyodo Yakuhin Co., Ltd. “Chemisorb 71”, “Chemisorb 72” manufactured by Chemipro Kasei Co., Ltd. "LA-32", "LA-38", "LA-36", "LA-34", "LA-31" manufactured by Adeka Company, "Chinubin P", "Tinubin 234" manufactured by Ciba Specialty Chemicals, "Tinubin 326", "Tinubin 327", "Tinubin 328" And the like.

  Specific examples of the benzophenone compound include 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, 2-hydroxy-4-n-octoxybenzophenone, 2-hydroxy-n-dodecyloxybenzophenone, bis (5-benzoyl-4-hydroxy-2-methoxyphenyl) methane, 2,2′-dihydroxy-4-methoxybenzophenone, 2,2′-dihydroxy-4,4 Examples include '-dimethoxybenzophenone. Specific examples of such benzophenone compounds include “Seesorb 100”, “Seesorb 101”, “Seesorb 101S”, “Seesorb 102” and “Seesorb 103” manufactured by Sipro Kasei Co., Ltd. “Biosorb 100”, “Biosorb 110”, “Biosorb 130”, manufactured by Kemipro Kasei Co., Ltd. “Chemisorb 10”, “Chemisorb 11”, “Chemisorb 11S”, “Chemisorb 12”, “Chemsorb 13”, “Chemisorb 111” BASF “Ubinur 400”, BASF “Ubinur M-40”, BASF “Ubinur MS-40”, Cytec Industries “Thiasorb UV9”, “Thiasorb UV284”, “Thiasorb UV531”, “Thiasorb” UV24 ", Ade Company Ltd. "ADK STAB 1413", and "ADEKA STAB LA-51" and the like.

  Specific examples of the salicylate compound include phenyl salicylate and 4-tert-butylphenyl salicylate. Specific examples of such salicylate compounds include “Seasorb 201” and “Seasorb 202” manufactured by Sipro Kasei Co., Ltd., “Chemisorb 21” and “Chemisorb 22” manufactured by Chempro Corporation. .

  Specific examples of the cyanoacrylate compound include ethyl-2-cyano-3,3-diphenyl acrylate, 2-ethylhexyl-2-cyano-3,3-diphenyl acrylate, and the like. Examples of such cyanoacrylate compounds include, for example, “Seasorb 501” manufactured by Sipro Kasei Co., Ltd., “Biosorb 910” manufactured by Kyodo Pharmaceutical Co., Ltd., “Ubisolator 300” manufactured by Daiichi Kasei Co., Ltd., BASF Corporation. “Ubinurur N-35”, “Ubinurur N-539” and the like can be mentioned.

  Specific examples of the oxanilide compound include 2-ethoxy-2'-ethyloxalinic acid bis-arinide and the like. Specific examples of such oxalinide compounds include “Sanduboa VSU” manufactured by Clariant.

  Specific examples of the malonic acid ester compound include 2- (alkylidene) malonic acid esters, particularly 2- (1-arylalkylidene) malonic acid esters. Especially, what is shown by following formula (9) is preferable.

（式（９）中、Ｘ^１は、水素原子、置換基を有していてもよい、炭素数１〜８の、アルキル基若しくはアルコキシ基、または、炭素数２〜１０のアルケニル基を示し、Ｒ^１及びＲ^２はそれぞれ独立に炭素数１〜６のアルキル基を表わす。）

(In Formula (9), X ¹ represents a hydrogen atom, an alkyl group or an alkoxy group having 1 to 8 carbon atoms, or an alkenyl group having 2 to 10 carbon atoms, which may have a substituent, R ¹ and R ² each independently represents an alkyl group having 1 to 6 carbon atoms.)

In Formula (9), X ¹ represents a hydrogen atom, an optionally substituted alkyl group or alkoxy group having 1 to 8 carbon atoms, or an alkenyl group having 2 to 10 carbon atoms.
The carbon number of the alkyl group and the alkoxy group in X ¹ is usually 1 or more, usually 8 or less, preferably 6 or less, more preferably 4 or less. Moreover, the alkyl group in an alkyl group or an alkoxy group may be linear or branched. Examples of this alkyl group include methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, s-butyl group, t-butyl group and the like.
Further, among X ¹ , the alkenyl group preferably has an ester group as a substituent. The carbon number of the alkenyl group including the carbon number of the substituent is usually 2 or more, preferably 3 or more, more preferably 4 or more, and usually 10 or less, preferably 8 or less. Among these, X ¹ itself is preferably a 2- (alkylidene) malonic acid ester which is a malonic acid ester moiety of the above-described formula (9), and among them, the same malon with the benzene ring of the formula (9) as the center. Those having acid ester residues are more preferred, and those having a para-position are particularly preferred.

In Formula (9), R ¹ and R ² represent an alkyl group having 1 to 6 carbon atoms. Among them, the number of carbon atoms in ^{R 1} and ^{R 2} are 1-4 preferred. In addition, the alkyl groups represented by R ¹ and R ² may each be linear or branched. Specific examples of R ¹ and R ² include methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, s-butyl group, t-butyl group and the like. Of these, a methyl group is more preferred. R ¹ and R ² may be the same or different.

  Specific examples of such malonic ester UV absorbers include “PR-25” manufactured by Clariant Japan, “B-CAP” manufactured by Ciba Specialty Chemicals, and the like.

  In addition, 1 type may contain the ultraviolet absorber and 2 or more types may contain it by arbitrary combinations and a ratio.

  The content of the ultraviolet absorber in the aromatic polycarbonate resin composition of the present invention is usually 0.01 parts by weight or more, preferably 0.1 parts by weight or more, and usually 3 parts by weight with respect to 100 parts by weight of the aromatic polycarbonate resin. The amount is not more than parts by weight, preferably not more than 1 part by weight. If the content of the ultraviolet absorber is too small, the effect of improving weather resistance and light resistance may be insufficient. Conversely, if the content is too large, mold deposits and the like may occur.

[8. Other ingredients]
The aromatic polycarbonate resin composition of the present invention may contain other components in addition to those described above, as long as the desired physical properties (for example, light diffusibility, flame retardancy, fluidity, etc.) are not significantly impaired. You may contain. Examples of other components include resins other than those described above and various resin additives. In addition, 1 type may contain other components and 2 or more types may contain them by arbitrary combinations and ratios.

Other resins Examples of other resins include thermoplastic polyester resins such as polyethylene terephthalate resin, polytrimethylene terephthalate resin, and polybutylene terephthalate resin; polystyrene resin, high impact polystyrene resin (HIPS), and acrylonitrile-styrene copolymer. Styrene such as (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-styrene-acrylic rubber copolymer (ASA resin), acrylonitrile-ethylenepropylene rubber-styrene copolymer (AES resin) Polyolefin resin; Polyethylene resin; Polyimide resin; Polyetherimide resin; Polyurethane resin; Polyphenylene ether resin; Polyphenylene Examples include sulfide resin; polysulfone resin; polymethacrylate resin, polylactic acid (PLA), polybutylene succinate (PBS) resin, and the like. In addition, 1 type may contain other resin and 2 or more types may contain it by arbitrary combinations and ratios.

Resin additives Examples of resin additives include heat stabilizers, antioxidants, mold release agents, dyes and pigments, flame retardants, antistatic agents, antifogging agents, lubricants, antiblocking agents, fluidity improvers, plastics Agents, dispersants, antibacterial agents and the like. In addition, 1 type may contain resin additive and 2 or more types may contain it by arbitrary combinations and a ratio.
Hereinafter, the example of an additive suitable for the aromatic polycarbonate resin composition of this invention is demonstrated concretely.

.. Heat stabilizer Examples of the heat stabilizer include phosphorus compounds. Any known phosphorous compound can be used. Specific examples include phosphorus oxo acids such as phosphoric acid, phosphonic acid, phosphorous acid, phosphinic acid, and polyphosphoric acid; acidic pyrophosphate metal salts such as acidic sodium pyrophosphate, acidic potassium pyrophosphate, and acidic calcium pyrophosphate; phosphoric acid Group 1 or Group 2B metal phosphates such as potassium, sodium phosphate, cesium phosphate, and zinc phosphate; organic phosphate compounds, organic phosphite compounds, organic phosphonite compounds, and the like. Among these, the organic phosphate compound represented by the following formula (10) and / or the organic phosphite compound represented by the following formula (11) are preferable.

O = P (OH) _m (OR) _3-m (10)
In said formula (10), R represents an alkyl group or an aryl group. Among them, R is usually an alkyl group having 1 or more, preferably 2 or more, and usually 30 or less, preferably 25 or less, or an aryl group having usually 6 or more and usually 30 or less carbon atoms. Is desirable. Furthermore, R is preferably an alkyl group rather than an aryl group. In addition, when two or more R exist, each R may be the same or different.
In the formula (10), m is usually 0 or more, preferably 1 or more, and usually represents an integer of 2 or less.

  In the formula (11), R ′ represents an alkyl group or an aryl group. Among them, R ′ is preferably an alkyl group having 1 to 30 carbon atoms or an aryl group having 6 to 30 carbon atoms. R ′ may be the same or different.

Preferred examples of the organic phosphite compound represented by the formula (11) include distearyl pentaerythritol diphosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, bis (2 , 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite.
In addition, 1 type may contain the heat stabilizer and 2 or more types may contain it by arbitrary combinations and a ratio.

  The content of the heat stabilizer is usually 0.001 parts by weight or more, preferably 0.01 parts by weight or more, more preferably 0.03 parts by weight or more with respect to 100 parts by weight of the aromatic polycarbonate resin. Usually, it is 1 part by weight or less, preferably 0.7 part by weight or less, more preferably 0.5 part by weight or less. If the amount of the heat stabilizer is too small, the heat stabilization effect may be insufficient. If the amount of the heat stabilizer is too large, the effect may reach a peak and may not be economical.

.. Antioxidants Examples of antioxidants include hindered phenol antioxidants. Specific examples thereof include pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl). ) Propionate, thiodiethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], N, N′-hexane-1,6-diylbis [3- (3,5-di-) tert-butyl-4-hydroxyphenylpropionamide), 2,4-dimethyl-6- (1-methylpentadecyl) phenol, diethyl [[3,5-bis (1,1-dimethylethyl) -4-hydroxyphenyl ] Methyl] phosphoate, 3,3 ′, 3 ″, 5,5 ′, 5 ″ -hexa-tert-butyl-a, a ′, a ″-(mesi Tylene-2,4,6-triyl) tri-p-cresol, 4,6-bis (octylthiomethyl) -o-cresol, ethylenebis (oxyethylene) bis [3- (5-tert-butyl-4- Hydroxy-m-tolyl) propionate], hexamethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 1,3,5-tris (3,5-di-tert- Butyl-4-hydroxybenzyl) -1,3,5-triazine-2,4,6 (1H, 3H, 5H) -trione, 2,6-di-tert-butyl-4- (4,6-bis ( Octylthio) -1,3,5-triazin-2-ylamino) phenol and the like.

Of these, pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] and octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate are preferable. . These two phenolic antioxidants are commercially available from Ciba Specialty Chemicals under the names “Irganox 1010” and “Irganox 1076”.
In addition, 1 type may contain antioxidant and 2 or more types may contain it by arbitrary combinations and a ratio.

  The content of the antioxidant is usually 0.001 part by weight or more, preferably 0.01 part by weight or more, and usually 1 part by weight or less, preferably 0.5 part, based on 100 parts by weight of the aromatic polycarbonate resin. Less than parts by weight. If there are too few antioxidants, the effect as an antioxidant may become inadequate, and when there are too many antioxidants, an effect may reach | attain and it may become economical.

.. Release agent Examples of the release agent include, for example, aliphatic carboxylic acids, esters of aliphatic carboxylic acids and alcohols (that is, aliphatic carboxylic acid esters), aliphatic hydrocarbon compounds having a number average molecular weight of 200 to 15000, Examples include polysiloxane silicone oil.

  Examples of the aliphatic carboxylic acid include saturated or unsaturated, linear or cyclic, aliphatic monovalent, divalent, or trivalent carboxylic acid. Among these, preferable aliphatic carboxylic acids are monovalent or divalent carboxylic acids having 6 to 36 carbon atoms, and aliphatic saturated monovalent carboxylic acids having 6 to 36 carbon atoms are more preferable. Specific examples of such aliphatic carboxylic acids include palmitic acid, stearic acid, caproic acid, capric acid, lauric acid, arachidic acid, behenic acid, lignoceric acid, serotic acid, melissic acid, tetrariacontanoic acid, montanic acid. , Adipic acid, azelaic acid and the like.

  As aliphatic carboxylic acid in aliphatic carboxylic acid ester, the same thing as the said aliphatic carboxylic acid can be used, for example. On the other hand, examples of the alcohol moiety of the ester include saturated or unsaturated, linear or cyclic, monohydric or polyhydric alcohols. These alcohols may have a substituent such as a fluorine atom or an aryl group. Among these, monovalent or polyvalent saturated alcohols having 30 or less carbon atoms are preferable, and saturated aliphatic monovalent or polyhydric alcohols having 30 or less carbon atoms are particularly preferable.

  Specific examples of such alcohols include octanol, decanol, dodecanol, stearyl alcohol, behenyl alcohol, ethylene glycol, diethylene glycol, glycerin, pentaerythritol, 2,2-dihydroxyperfluoropropanol, neopentylene glycol, ditrimethylolpropane, dipentaol. Examples include erythritol.

  The aliphatic carboxylic acid ester may contain an aliphatic carboxylic acid and / or an alcohol as an impurity. The aliphatic carboxylic acid ester may be a pure substance or a mixture of a plurality of aliphatic carboxylic acid esters. Furthermore, the aliphatic carboxylic acid and alcohol which combine and comprise one aliphatic carboxylic acid ester may each use 1 type, and may use 2 or more types together by arbitrary combinations and ratios.

  Specific examples of the aliphatic carboxylic acid ester include beeswax (a mixture based on myricyl palmitate), stearyl stearate, behenyl behenate, stearyl behenate, glycerin monopalmitate, glycerin monostearate, glycerin di Examples thereof include stearate, glycerin tristearate, pentaerythritol monopalmitate, pentaerythritol monostearate, pentaerythritol distearate, pentaerythritol tristearate, pentaerythritol tetrastearate and the like.

  Examples of the aliphatic hydrocarbon having a number average molecular weight of 200 to 15000 include liquid paraffin, paraffin wax, microwax, polyethylene wax, Fischer-Tropsch wax, and α-olefin oligomer having 3 to 12 carbon atoms. Here, the aliphatic hydrocarbon includes alicyclic hydrocarbons. Moreover, these hydrocarbon compounds may be partially oxidized.

Among these aliphatic hydrocarbons, paraffin wax, polyethylene wax, or a partial oxide of polyethylene wax is preferable, and paraffin wax and polyethylene wax are more preferable.
Further, the number average molecular weight of the aliphatic hydrocarbon is preferably 200 or more, and more preferably 5000 or less.
The aliphatic hydrocarbon may be a single substance or a mixture of various constituent components and molecular weights as long as the main component is within the above range.

  Examples of the polysiloxane silicone oil include dimethyl silicone oil, phenylmethyl silicone oil, diphenyl silicone oil, and fluorinated alkyl silicone.

  In addition, 1 type may contain the mold release agent mentioned above, and 2 or more types may contain it by arbitrary combinations and a ratio.

  The content of the release agent is usually 0.001 part by weight or more, preferably 0.01 part by weight or more, and usually 2 parts by weight or less, preferably 1 part by weight with respect to 100 parts by weight of the aromatic polycarbonate resin. Or less. If the content of the release agent is too small, the release effect may not be sufficiently exerted. If the content is too high, the hydrolysis resistance of the aromatic polycarbonate resin composition may deteriorate, mold contamination may occur during injection molding, etc. May occur.

-Dye / pigment Examples of the dye / pigment include inorganic pigments, organic pigments, and organic dyes.
Examples of inorganic pigments include sulfide pigments such as carbon black, cadmium red, and cadmium yellow; silicate pigments such as ultramarine blue; titanium oxide, zinc white, petal, chromium oxide, iron black, titanium yellow, zinc- Oxide pigments such as iron brown, titanium cobalt green, cobalt green, cobalt blue, copper-chromium black and copper-iron black; chromic pigments such as chrome lead and molybdate orange; Examples include Russian pigments.

  Examples of organic pigments and organic dyes include phthalocyanine dyes such as copper phthalocyanine blue and copper phthalocyanine green; azo dyes such as nickel azo yellow; thioindigo, perinone, perylene, quinacridone, dioxazine, iso Examples thereof include condensed polycyclic dyes such as indolinone and quinophthalone; anthraquinone, heterocyclic and methyl dyes.

Of these, titanium oxide, carbon black, cyanine-based, quinoline-based, anthraquinone-based, and phthalocyanine-based compounds are preferable from the viewpoint of thermal stability.
In addition, 1 type may contain the dye / pigment, and 2 or more types may contain it by arbitrary combinations and a ratio.

  The content of the dye / pigment is usually 5 parts by weight or less, preferably 3 parts by weight or less, more preferably 2 parts by weight or less with respect to 100 parts by weight of the aromatic polycarbonate resin. If the content of the dye / pigment is too large, the impact resistance may not be sufficient.

・ ・ Flame retardants Examples of flame retardants include halogenated flame retardants such as brominated bisphenol epoxy resins, brominated bisphenol phenoxy resins, and brominated polystyrene, phosphate ester flame retardants, organometallic salt flame retardants, and silicones. Flame retardants, inorganic compound flame retardants (auxiliaries), and the like.

Among these, organometallic salt flame retardants, silicone flame retardants, and inorganic compound flame retardants (auxiliaries) that have a very low possibility of environmental pollution are preferable. Examples of the inorganic compound flame retardant (auxiliary) agent include talc, mica, kaolin, clay, silica powder, fumed silica, and glass flake.
In addition, 1 type may be contained for a flame retardant, and 2 or more types may be contained by arbitrary combinations and ratios.

  The content of the flame retardant is usually 0.0001 parts by weight or more, preferably 0.01 parts by weight or more, more preferably 0.1 parts by weight or more, and usually 30 parts by weight with respect to 100 parts by weight of the aromatic polycarbonate resin. Part or less, preferably 25 parts by weight or less, more preferably 20 parts by weight or less. If the content of the flame retardant is too small, the flame retardant effect may be insufficient. On the other hand, if the content is too large, the heat resistance and mechanical properties may be significantly reduced.

[9. Method for producing aromatic polycarbonate resin composition]
There is no restriction | limiting in the manufacturing method of the aromatic polycarbonate resin composition of this invention, The manufacturing method of a well-known resin composition can be employ | adopted widely.
Specific examples include the aromatic polycarbonate (A), the light diffusing agent (B), the silicone resin (C), and the organometallic salt compound (D), and, if necessary, the fluoropolymer (E), ultraviolet rays. Absorbent (F) and other components are mixed in advance using various mixers such as a tumbler or Henschel mixer, and then Banbury mixer, roll, brabender, single-screw kneading extruder, twin-screw kneading extruder, kneader, etc. And melt kneading.

In addition, for example, without mixing each component in advance, or by mixing only a part of the components in advance, the mixture is supplied to an extruder using a feeder and melt-kneaded to obtain the aromatic polycarbonate resin composition of the present invention. It can also be manufactured.
Also, for example, by mixing a part of the components in advance and supplying the resulting mixture to an extruder and melt-kneading it as a master batch, the master batch is again mixed with other components and melt-kneaded. The aromatic polycarbonate resin composition of the present invention can also be produced. In this case, a silicone resin (C) or an organometallic salt compound (D) is mixed with a resin component such as an aromatic polycarbonate resin (A) in advance to prepare a master batch, and then mixed with other components and melt-kneaded. Then, since the aromatic polycarbonate resin composition excellent in the dispersibility and also in the extrusion workability | operativity is obtained, it is preferable. Further, from the viewpoint of improving the dispersibility of the organometallic salt compound (D) described above, the organometallic salt compound (D) can be previously dissolved in a solvent such as water or an organic solvent and then kneaded.

[10. Main advantages]
Since the aromatic polycarbonate resin composition of the present invention is excellent in light diffusibility, it has a property of sufficiently diffusing light from a light source. In addition, the aromatic polycarbonate resin composition of the present invention has excellent flame retardancy and fluidity in addition to this, and therefore has sufficient flame retardancy and excellent fluidity even when it is a thin-walled molded article. Have.
In addition, the aromatic polycarbonate resin composition of the present invention usually has the above-mentioned light diffusibility, flame retardancy, and flame resistance without impairing the excellent mechanical properties, thermal properties, and electrical properties of the aromatic polycarbonate resin. Realizes fluidity.
Furthermore, the aromatic polycarbonate resin composition of the present invention usually has an advantage of being excellent in heat resistance, impact resistance and rigidity.

[11. Molded body]
The above-described aromatic polycarbonate resin composition of the present invention is usually molded into some shape and used as a molded body (aromatic polycarbonate resin composition molded body). There is no restriction | limiting in the shape, pattern, color, dimension, etc. of this molded object, What is necessary is just to set arbitrarily according to the use of the molded object.

  Examples of molded products include electrical and electronic equipment and parts, OA equipment, information terminal equipment, machine parts, home appliances, vehicle parts, building components, various containers, leisure goods and miscellaneous goods, lighting devices, liquid crystal televisions, etc. Various uses such as a direct type backlight unit and an edge light unit. Among them, it is particularly suitable for use in electrical / electronic equipment, OA equipment, information terminal equipment, housings for home appliances, cover members, vehicle exterior / skin parts, and interior parts.

Examples of the electrical / electronic devices, OA devices, information terminal devices, housings for home appliances, and cover members include display devices such as personal computers, game machines, and televisions, printers, copiers, scanners, fax machines, electronic notebooks, and PDAs. , Electronic desk calculators, electronic dictionaries, cameras, video cameras, mobile phones, battery packs, drive and readers for recording media, mice, numeric keys, CD players, MD players, portable radio / audio player housings, covers, keyboards , Buttons, switch members, and the like.
Among these members, in particular, when applied to a member having a light source behind and covering the light source, it is difficult to see through the light source, and it is possible to ensure luminance that can provide visibility, so that it is preferably used. Can do.

In addition, as an application of the molded body, a lighting member is also suitable. Examples of the illumination member include a glove box, a signal, a display, a signboard, a cover such as a transmission screen, a housing, and the like for various lighting fixtures used indoors and outdoors. Among these, it is particularly preferable to use it as a light diffusing material for illumination by utilizing its excellent light diffusibility.
Moreover, since the aromatic polycarbonate resin composition of this invention has high heat resistance, it can be used suitably also for the member which uses LED for the light source.

  The method for producing moldability is not particularly limited, and for example, a molding method generally used for thermoplastic resins can be arbitrarily adopted. For example, injection molding method, ultra-high speed injection molding method, injection compression molding method, two-color molding method, hollow molding method such as gas assist, molding method using heat insulating mold, rapid heating mold were used. Molding method, foam molding (including supercritical fluid), insert molding, IMC (in-mold coating molding) molding method, extrusion molding method, sheet molding method, thermoforming method, rotational molding method, laminate molding method, press molding method, etc. Is mentioned. A molding method using a hot runner method can also be used.

  Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to the following examples, and can be arbitrarily modified and implemented without departing from the gist of the present invention. In the following description, “parts” means “parts by weight” based on the weight basis unless otherwise specified.

[Production of resin pellets]
Each component described in Table 2 to be described later is blended at a ratio (weight ratio) described in Table 3, mixed for 20 minutes with a tumbler, and then supplied to Nippon Steel Works (TEX30HSST) equipped with 1 vent. The molten resin kneaded under the conditions of a screw rotational speed of 200 rpm, a discharge rate of 15 kg / hour, and a barrel temperature of 280 ° C., rapidly cooled in a water tank, pelletized using a pelletizer, and aromatic polycarbonate resin composition Pellets were obtained.

[Preparation of UL Test Specimen and Sheet Molded Product]
After the pellets obtained by the above-described production method were dried at 120 ° C. for 5 hours, a cylinder temperature of 290 ° C., a mold temperature of 80 ° C., a molding cycle of 30 using a J50-EP type injection molding machine manufactured by Nippon Steel. Injection molding was performed under the conditions of seconds, and a test piece having a length of 125 mm, a width of 13 mm, and a thickness of 1.58 mm, and a sheet-like molded body of 2 mm × 50 mm × 90 mm were formed. The obtained molded body was evaluated for flame retardancy as a UL test sample in the manner described below.

[Flame retardance evaluation]
The flame retardant evaluation of each aromatic polycarbonate resin composition was carried out by conditioning a test specimen for UL test for 48 hours in a temperature-controlled room with a temperature of 23 ° C. and a humidity of 50%. US Underwriters Laboratory (UL) UL In accordance with the UL94 test (combustion test of plastic materials for equipment parts). UL94V is a method for evaluating flame retardancy from the after-flame time and drip properties after indirect flame of a burner for 10 seconds on a test piece of a predetermined size held vertically, V-0, V- In order to have flame retardancy of 1 and V-2, it is necessary to satisfy the criteria shown in Table 1 below.

  Here, the after-flame time is the length of time for which the flammable combustion of the test piece is continued after the ignition source is moved away. The cotton ignition by the drip is determined by whether or not the labeling cotton, which is about 300 mm below the lower end of the test piece, is ignited by a drip from the test piece. Moreover, when one of the five samples did not satisfy the above criteria, it was evaluated as NR (not rated) because V-2 was not satisfied.

[Fluidity evaluation]
Using a Koka type flow tester (manufactured by Shimadzu Corporation), a pellet-shaped resin composition dried under conditions using an orifice having a temperature of 280 ° C., a load of 160 kgf / cm ² , a diameter of 1 mm × a length of 10 mm, The outflow amount Q value per unit time was measured. The unit is (× 10 ⁻² cc / s), and a larger value indicates better fluidity.

[Visibility (diffusibility)]
10 LEDs of 0.6 candela are placed 10 cm away from the back side of the 2 mm × 50 mm × 90 mm sheet-like molded body, and the glare of the LED from a position 30 cm away from the surface side of the sheet-like molded body is bright. The thickness was visually observed. The case where there was glare was indicated as x, the case where there was little glare but the brightness was slightly dark was indicated as Δ, and the case where there was no glare was indicated as ○.

Comparing Comparative Examples 3 and 4, it can be seen that as the amount of silicone resin increases, flame retardancy decreases. Thus, conventionally, it has been thought that when the amount of the silicone resin increases, the vaporized silicone resin itself burns and, on the contrary, reduces the flame retardancy.
However, when an example is seen with respect to this, it can be confirmed that the flame retardancy is unexpectedly improved by further increasing the amount of the silicone resin.
Moreover, it turns out from the result of an Example that the aromatic polycarbonate resin composition of this invention is excellent also in light diffusibility and fluidity | liquidity.

  The present invention can be used in a wide range of industrial fields, and is suitable for use as a light source covering member that covers a light source for illumination, such as a cover and a housing.

Claims (15)

100 parts by weight of aromatic polycarbonate resin (A),
0.1 to 10 parts by weight of the light diffusing agent (B),
The unit represented by RSiO _1.5 (wherein R represents a monovalent hydrocarbon group having 1 to 12 carbon atoms) is the entire siloxane unit (R _0-3 SiO _2.0-0.5 ). And 1.8 to 7.5 parts by weight of a silicone resin (C) containing 50 mol% or more of the total hydrocarbon groups (R) and the aryl group occupying 50 mol% or more,
An aromatic polycarbonate resin composition comprising 0.01 to 1 part by weight of an organometallic salt compound (D).   The aromatic polycarbonate resin composition according to claim 1, wherein the fluoropolymer (E) is contained in an amount of 0.01 to 1 part by weight with respect to 100 parts by weight of the aromatic polycarbonate resin (A).   The aromatic polycarbonate resin (A) is composed of 80 to 10% by weight of a linear aromatic polycarbonate resin (A-1) and 20 to 90% by weight of a branched aromatic polycarbonate resin (A-2). The aromatic polycarbonate resin composition according to claim 1 or 2.   The aromatic polycarbonate resin composition according to claim 3, wherein the branched aromatic polycarbonate resin (A-2) is an aromatic polycarbonate resin obtained by a melt transesterification method.   The content of the silicone resin (C) is 1.8 to 5 parts by weight based on 100 parts by weight of the aromatic polycarbonate resin (A). The aromatic polycarbonate resin composition described in 1.   The aromatic polycarbonate resin composition according to any one of claims 1 to 5, wherein the aromatic polycarbonate resin (A) has a viscosity average molecular weight of 14,000 to 24,000.   The content of the light diffusing agent (B) is 0.5 to 5 parts by weight with respect to 100 parts by weight of the aromatic polycarbonate resin (A). The aromatic polycarbonate resin composition according to Item.   The aromatic polycarbonate resin composition according to any one of claims 1 to 7, wherein the aryl group of the silicone resin (C) is a phenyl group. The silicone resin (C) contains 80 mol% or more of the unit represented by RSiO _1.5 with respect to the total siloxane units (R _0-3 SiO _2.0-0.5 ). The aromatic polycarbonate resin composition according to any one of claims 1 to 8, which is a silicone resin in which an aryl group accounts for 80 mol% or more of all hydrocarbon groups.   10. The organic acid metal salt compound (D) is an alkali metal salt and / or an alkaline earth metal salt of a fluorine-containing alkyl sulfonic acid and / or an aromatic sulfonic acid. The aromatic polycarbonate resin composition according to claim 1.   The aromatic polycarbonate resin composition according to any one of claims 1 to 10, wherein the light diffusing agent (B) is acrylic fine particles and / or silicone fine particles.   The fragrance according to any one of claims 1 to 11, wherein the ultraviolet absorber (F) is contained in an amount of 0.01 to 3 parts by weight with respect to 100 parts by weight of the aromatic polycarbonate resin (A). Group polycarbonate resin composition.   The aromatic polycarbonate resin composition according to claim 12, wherein the ultraviolet absorber (F) is a benzotriazole compound and / or a triazine compound.   A molded article obtained by molding the aromatic polycarbonate resin composition according to any one of claims 1 to 13.   A lighting member, comprising the aromatic polycarbonate resin composition according to any one of claims 1 to 13.