WO2006087940A1 - ポリカーボネート樹脂組成物及びその成形品 - Google Patents
ポリカーボネート樹脂組成物及びその成形品 Download PDFInfo
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- WO2006087940A1 WO2006087940A1 PCT/JP2006/302063 JP2006302063W WO2006087940A1 WO 2006087940 A1 WO2006087940 A1 WO 2006087940A1 JP 2006302063 W JP2006302063 W JP 2006302063W WO 2006087940 A1 WO2006087940 A1 WO 2006087940A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
- C08L25/14—Copolymers of styrene with unsaturated esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
- C08K5/523—Esters of phosphoric acids, e.g. of H3PO4 with hydroxyaryl compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
- C08L25/12—Copolymers of styrene with unsaturated nitriles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
Definitions
- the present invention relates to a polycarbonate resin composition, and more particularly to a polycarbonate resin composition with improved weld strength and a molded product thereof.
- polycarbonate resin has excellent mechanical properties and has been widely used industrially as a raw material in the automotive field, OA equipment field, electrical and electronic field, etc., but it has a melt viscosity.
- drawbacks such as high fluidity, poor fluidity, and large thickness dependence of impact strength.
- a method of using a polycarbonate having a low molecular weight and a method of blending various fluidity modifiers.
- a styrene-based resin such as ABS resin (acrylonitrile / butadiene / styrene copolymer) is blended to improve these problems.
- thermoplastic resin compositions composed of polycarbonate and styrene-based resin have been used in recent years for large molded products such as the automobile field and OA equipment field, and small molded products such as portable terminals. These products are becoming thinner year by year for the purpose of weight reduction and higher functionality, and those with good flow are preferred for resin, and multipoint gates are preferred for design. In particular, when trying to obtain a molded product with a multi-point gate, the molded product has a portion where molten resin joins at the time of molding, that is, a force for forming a weld.
- a thermoplastic resin composition comprising polycarbonate and styrene-based resin Has the problem that the strength at the weld (sometimes abbreviated as “weld strength”), particularly the weld strength during residence, is significantly inferior.
- Patent Document 1 discloses a method using a polycarbonate having a specific end group. The strength of the description of the ABS resin composition and the relationship between the morphology and the weld strength. In addition, it has the above specific end groups. Even with a resin composition containing polycarbonate and ABS resin, the weld strength could not be improved at all.
- Patent Document 2 discloses a method in which a polycarbonate having a specific viscoelasticity is used as a thermoplastic resin composition comprising polycarbonate and styrene resin having excellent weld strength, rib strength and transferability.
- a polycarbonate having a specific viscoelasticity is used as a thermoplastic resin composition comprising polycarbonate and styrene resin having excellent weld strength, rib strength and transferability.
- the description of the ABS resin composition and the specific relationship between the morphology and the weld strength was strong.
- Patent Document 3 discloses a weight average particle size of not less than 0.3 as a rubber-reinforced bull resin used in a composition containing a rubber-reinforced bull resin ZPCZ scale filler. Although it is stated that a combination of a rubber having a small particle size of less than ⁇ m and a rubber having a weight average particle size of 0.3 ⁇ m or more and 2 ⁇ m or less is useful, the monomer composition and morphology The description about the relationship with the weld strength was strong. Further, in Patent Document 3, the particle diameter to be measured by force is defined by weight average if no measurement method of average particle diameter is described, but the definition is not mentioned at all. Therefore, the invention described in Patent Document 3 is completely unclear even what kind of particle size rubber is proposed to be used.
- Patent Document 1 Japanese Patent Publication No. 7-98892
- Patent Document 2 Japanese Patent Laid-Open No. 2003-20395
- Patent Document 3 Japanese Patent No. 3384902
- An object of the present invention is to provide a polycarbonate resin composition having excellent weld strength and a molded product thereof.
- AS resin acrylonitrile-styrene copolymer, etc.
- ABS resin acrylonitrile-styrene copolymer, etc.
- the present invention has been made in order to solve the above-mentioned problems, and the gist thereof is (a) 60 to 95 parts by weight of an aromatic polycarbonate resin, and (b) at least a styrene-based monomer in the presence of rubber.
- Styrene Z (meth) acrylonitrile obtained by polymerizing the polymer and (meth) acrylonitrile monomer 4 to 39 parts by weight of a copolymer
- the styrene Z (meth) acrylonitrile copolymer domain (hereinafter referred to as the “AS domain”) dispersed in the polycarbonate resin matrix is measured by image processing of an electron micrograph of the composition.
- T, U.) average occupation area Sd m 2 ) and the average occupation of rubber particles dispersed in the AS domain The polycarbonate resin composition and its molded product are characterized in that the area Sg m 2 ) satisfies the following relational expression (1).
- the polycarbonate resin composition of the present invention is excellent in fluidity and weld strength, and is useful as a large-sized molded product or a thin-walled molded product in the fields of electrical and electronic equipment and precision machinery.
- FIG. 1 is an electron micrograph of an ultrathin section of the pellet obtained in Example 1.
- FIG. 4 Electron micrograph of an ultrathin section of the pellet obtained in Comparative Example 1.
- the (a) aromatic polycarbonate resin is a branched product obtained by reacting an aromatic dihydroxy compound or a small amount thereof with phosgene or a carbonic acid diester.
- the thermoplastic polymer or copolymer which may be sufficient is mentioned.
- the production method of the polycarbonate rosin can be a conventional method such as a phosgene method (interfacial polymerization method) or a melting method (transesterification method), which is not particularly limited. Further, it may be a polycarbonate resin manufactured by a melting method and manufactured by adjusting the amount of OH groups of terminal groups.
- the blending amount of the aromatic polycarbonate resin is such that (a) the aromatic polycarbonate resin and (b) at least a styrene monomer and a (meth) acrylonitrile monomer are polymerized in the presence of rubber.
- Styrene Z (meth) acrylonitrile copolymer obtained by polymerizing at least styrene monomer and (meth) acrylonitrile monomer in the absence of rubber
- the amount is 60 to 95 parts by weight, preferably 65 to 90 parts by weight, based on 100 parts by weight of the total copolymer. If the amount of aromatic polycarbonate resin exceeds the upper limit, the fluidity decreases, and if the lower limit is not reached, the heat resistance tends to decrease.
- Aromatic dihydroxy compounds include 2, 2 bis (4-hydroxyphenol) propane (
- bisphenol A Bisphenol A
- tetramethylbisphenol A bis (4-hydroxyphenol) p-diisopropylbenzene, hydroquinone, resorcinol, 4,4-dihydroxydiphenol, etc.
- bisphenol A preferably bisphenol A is Can be mentioned.
- aromatic dihydroxy compound a compound in which one or more tetraalkylphosphonium sulfonates are bonded can be used.
- a monovalent aromatic hydroxy compound may be used.
- Monovalent aromatic hydroxy compounds include aromatic monohydroxy groups such as m- and p-methylphenol, m- and p-propylphenol, p-tert-butylphenol, and p-long chain alkyl-substituted phenols. Compound etc. are mentioned.
- aromatic polycarbonate resin it is preferable to use polycarbonate resin in which 2,2-bis (4-hydroxyphenyl) propane power is also induced, or 2,2-bis (4-hydroxyphenyl) propane. And polycarbonate copolymers derived from other aromatic dihydroxy compounds. A polymer or oligomer having a siloxane structure can be copolymerized. These aromatic polycarbonate resins may be used in combination of two or more.
- the molecular weight of the aromatic polycarbonate resin is a viscosity average molecular weight calculated from a solution viscosity measured at a temperature of 25 ° C using methylene chloride as a solvent, and is 16,000 to 300,000, preferably 18 , 000 to 28,000. If the viscosity average molecular weight exceeds the upper limit, the fluidity is insufficient if the lower limit is not reached.
- the (b) styrene Z (meth) acrylonitrile copolymer is a polymer of at least a styrene monomer and a (meth) acrylonitrile monomer in the presence of rubber.
- This is a styrene Z (meth) acrylonitrile copolymer obtained by polymerization of the monomer and other monomers copolymerizable with the (meth) acrylonitrile monomer.
- the above two or more types of monomers are not limited to those which are all graft-polymerized with rubber to form a graft copolymer. . Rather, it is usually a mixture containing a graft copolymer and a copolymer in which only two or more monomers are copolymerized with each other.
- the (b) styrene Z (meth) acrylonitrile-based copolymer in the present invention includes, for example, ABS resin, AES resin, AAS resin, etc., depending on the types of rubber and monomers constituting the copolymer.
- Examples of the method for producing these copolymers include known methods such as an emulsion polymerization method, a solution polymerization method, a suspension polymerization method, and a bulk polymerization method.
- the amount of (b) styrene Z (meth) acrylonitrile copolymer is: (a) an aromatic polycarbonate resin; (b) at least a styrene monomer and (meth) acrylonitrile in the presence of rubber.
- styrene Z (meth) acrylonitrile copolymer obtained by polymerizing at least a styrene monomer and a (meth) atari mouth-tolyl monomer in the presence of rubber, Always use (b,) polymerize at least a styrene monomer and (meth) atari mouth nitrile monomer in the absence of rubber.
- the amount of (b,) styrene Z (meth) acrylonitrile copolymer is (a) aromatic polycarbonate resin, (b) at least styrene monomer in the presence of rubber and (meth) Styrene Z (meth) acrylonitrile copolymer obtained by polymerizing acrylonitrile monomer and at least styrene monomer and (meth) acrylonitrile monomer in the absence of (b,) rubber 1 to 36 parts by weight, preferably 3 to 25 parts by weight, based on 100 parts by weight of the total styrene Z (meth) acrylonitrile copolymer.
- the blending amount of this (b,) styrene Z (meth) acrylonitrile copolymer exceeds the upper limit, the impact resistance decreases, and when the lower limit is not reached, the fluidity tends to decrease.
- Examples of the styrene monomer include styrene, ⁇ -methylstyrene, p-methylstyrene, and preferably styrene.
- Examples of the (meth) acrylonitrile-based monomer include acrylonitrile and meta-tolyl-tolyl.
- Examples of monomers copolymerizable with styrene monomers and (meth) acrylonitrile monomers include, for example, methyl acrylate, ethyl acrylate, propyl acrylate, methyl methacrylate, and ethyl acetate.
- (Meth) acrylic acid alkyl ester, maleimide, N-phenylmaleimide and the like are preferable, and (meth) acrylic acid alkyl ester is preferable.
- the rubber is preferably a rubber having a glass transition temperature of 10 ° C or lower.
- Specific examples of rubber include Gen rubber, acrylic rubber, ethylene Z propylene rubber, silicon rubber and the like. Among these, from the viewpoint of the balance between performance and cost, preferably, a Gen rubber or an Atal rubber is selected.
- Gen rubber examples include polybutadiene, butadiene Z styrene copolymer, polyisoprene, butadiene / (meth) acrylic acid lower alkyl ester copolymer, butadiene Z styrene Z (meth) acrylic acid lower
- Butadiene Z (meth) the proportion of (meth) acrylic acid lower alkyl ester le in the lower alkyl ester acrylate copolymer or butadiene Z styrene / (meth) Atari Le acid lower alkyl ester copolymer, 30 weight of the rubber by weight 0 / Is preferably less than 0 .
- Examples of the acrylic rubber include alkyl acrylate rubber, and the alkyl group preferably has 1 to 8 carbon atoms.
- Specific examples of the alkyl acrylate rubber include ethyl acrylate, butyl acrylate, ethyl hexyl acrylate, and the like.
- a crosslinkable ethylenically unsaturated monomer may optionally be used.
- crosslinking agent examples include alkylenediol di (meth) acrylate, polyester di (meth) Examples include attalylate, dibulebenzene, tributylbenzene, triallyl cyanurate, allylic (meth) acrylate, butadiene, and isoprene.
- acrylic rubber examples include a core-shell type polymer having a crosslinked gen rubber as a core.
- the phosphorus-based flame retardant (c) in the present invention is a compound containing phosphorus in the molecule, and preferably includes a phosphorus-based compound represented by the following general formula (1) or (2). [0032] [Chemical 1]
- R 1 , R 2 and R 3 each represents an alkyl group having 1 to 6 carbon atoms or an aryl group having 6 to 20 carbon atoms which may be substituted with an alkyl group, h, i and j represent 0 or 1, respectively.
- the phosphorus compound represented by the general formula (1) can be produced from phosphorus oxychloride or the like by a known method.
- Specific examples of the phosphorus compound represented by the general formula (1) include triphenyl phosphate, tricresyl phosphate, diphenyl 2-ethylcresyl phosphate, tri (isopropyl phenol), methylphosphonate diphenyl ester, Examples thereof include jetyl ester of phosphophosphonate, disulfuryl phosphate, and tributyl phosphate.
- R 4 , R 5 , R 6 and R 7 are each an aryl group having 6 to 20 carbon atoms which may be substituted with an alkyl group having 1 to 6 carbon atoms or an alkyl group.
- P, q, r and s are each 0 or 1
- t is an integer of 1 to 5
- X is an arylene group.
- the phosphorus compound represented by the general formula (2) is a condensed phosphate ester in which t is 1 to 5, and t is a mixture of condensed phosphate esters in which t is different. Average value.
- X represents an arylene group, which is a divalent group that also induces dihydroxy compounds such as resorcinol, hydroquinone, and bisphenol A.
- the phosphorus compound represented by the general formula (2) include, when resorcinol is used as a dihydroxy compound, phenol resorcinol polyphosphate, cresyl resorcinol polyphosphate, vinyl cresyl 'Resorcin' polyphosphate, xylyl'resorcin 'polyphosphate, ferrule p-t butylphenol ⁇ resorcin ⁇ polyphosphate, phenyl ⁇ isopropyl phenol ⁇ resorcin polyphosphate, cresinore ⁇ xylinole ⁇ resornoresin ⁇ polyphosphate , Phenylol, isopropyl phenyl, diisopropyl phenyl, resorcin polyphosphate, and the like.
- the (c) phosphorus-based flame retardant in the present invention may be a phosphazene compound.
- a cyclic phenoxyphosphazene compound, a chain phenoxyphosphazene compound, and a crosslinked phenoxyphosphazene compound are also at least one selected.
- the amount of the phosphorus-based flame retardant is such that (a) an aromatic polycarbonate resin and (b) at least a styrene monomer and a (meth) acrylonitrile monomer are polymerized in the presence of rubber.
- Styrene / (meth) acrylonitrile copolymer obtained by polymerizing at least a styrene monomer and (meth) acrylonitrile monomer in the absence of (b,) rubber.
- the amount is 0 to 40 parts by weight, preferably 3 to 30 parts by weight, more preferably 5 to 25 parts by weight, based on 100 parts by weight of the total amount of the mouth-tolyl copolymer. If the amount of the phosphorus-based flame retardant exceeds the upper limit, the mechanical properties tend to deteriorate.
- Examples of the (d) fluorinated polyolefin in the present invention include fluorinated polyethylene, preferably polytetrafluoroethylene having a fibril-forming ability, which can be easily dispersed in the polymer and It shows the tendency to make a fibrous material by bonding.
- Polytetrafluoroethylene with fibril-forming ability is classified as Type 3 according to ASTM standards.
- Examples of polytetrafluoroethylene having fibril-forming ability include, for example, Mitsui's DuPont Fluorochemical Co., Ltd., Teflon (registered trademark) 6J or Teflon (registered trademark) 30J, or Daikin Industries, Ltd. As marketed! RU
- the compounding amount of the fluorinated polyolefin is (a) an aromatic polycarbonate resin, and (b) a styrene polymer obtained by polymerizing at least a styrene monomer and a (meth) acrylonitrile monomer in the presence of rubber.
- the amount is 0 to 5 parts by weight, preferably 0.02 to 4 parts by weight, more preferably 0.03 to 3 parts by weight, based on 100 parts by weight of the total tolyl copolymer.
- the blending amount of the fluorinated polyolefin exceeds the upper limit, the appearance of the molded product is deteriorated, which is not preferable.
- the (e) inorganic filler in the present invention is not particularly limited, and can include all conventional inorganic fillers. Specifically, for example, glass fiber, glass flake, glass bead, milled glass, hollow glass, talc, clay, My strength, carbon fiber, wollastonite, potassium titanate whisker, acid titanium titanium whisker In view of appearance, milled glass, talc, clay, wollastonite, etc. are preferably used. Among them, the number average particle size measured by laser diffraction method is 9. O / zm or less. And the content of Fe component and A1 component in talc is 0.5 wt% or less as FeO and AlO, respectively.
- Some talc forces that are not surface-treated are more preferably used.
- the amount of the inorganic filler is determined by polymerizing (a) an aromatic polycarbonate resin and (b) at least a styrene monomer and a (meth) acrylonitrile monomer in the presence of rubber.
- a styrene / (meth) acrylonitrile copolymer obtained by polymerizing at least a styrene monomer and a (meth) acrylonitrile monomer in the absence of (b,) rubber.
- the amount is 0 to 50 parts by weight, preferably 1 to 40 parts by weight, and more preferably 3 to 30 parts by weight with respect to 100 parts by weight of the total of the tolyl copolymer. If the blending amount of the inorganic filler exceeds the upper limit, the appearance of the molded product and impact strength are lowered, which is not preferable.
- AS domain and rubber particles average occupation area Sd, Sg, measured by image processing of electron micrograph of the composition:
- the resin composition of the present invention or a molded article thereof is usually (a) in a continuous phase (referred to as “matrix” in this specification) in which a component, one aromatic polycarbonate resin, and (b). ) Component Styrene Z (meth) acrylonitrile copolymer obtained by polymerizing at least styrene monomer and (meth) acrylonitrile monomer in the presence of rubber and (b,) at least in the absence of rubber Many discontinuous phases consisting of a mixture of styrene Z (meth) acrylonitrile copolymer obtained by polymerizing styrene monomer and (meth) acrylonitrile monomer (in this specification, (b It is referred to as “AS domain” regardless of whether it is derived from component (b ′) or “AS domain.” Some AS domains include those that contain rubber particles.
- Is a dispersed morphology This state can be easily confirmed with an electron microscope by applying an appropriate staining technique such as two-step staining with osmium tetroxide and ruthenium tetroxide. That is, in transmission electron microscope observation after two-stage staining, as shown in the attached FIG. 1 or FIG. 4, (A) a gray matrix, (B) a light AS domain, and (C) A dark discontinuous phase within the bright AS domain is recognized in 3 minutes. Among these, (C) the dark discontinuous phase is a dyed product of osmium tetroxide of rubber with or without graft polymerization of the above two monomers.
- an appropriate staining technique such as two-step staining with osmium tetroxide and ruthenium tetroxide. That is, in transmission electron microscope observation after two-stage staining, as shown in the attached FIG. 1 or FIG. 4, (A) a gray matrix, (B) a light AS domain, and
- the present inventors have determined that such a morphology of the composition, in particular, (B) an average occupied area of a light AS domain and (C) a dark discontinuous phase (rubber particles),
- a certain conclusion was reached. That is, when the total weight ratio of the component (b) + (b ′) to the total weight of the component (a) + (b) + the component (b ′) was Bwt%, the dyeing was performed as described above.
- the average occupied area Sd (m 2 ) of the AS domain dispersed in the polycarbonate resin matrix and the average occupied area of the rubber particles dispersed in the AS domain measured by processing an electron micrograph of the composition.
- the value of SgZ (SdZB 2/3 ), which is a function of Sg (m 2 ) must be 0.5 or more, that is, Sd and Sg force relational expression (1) must be satisfied.
- the value of the following relational expression (1) is preferably 0.55 or more, more preferably 0.6 or more.
- the value of Sd varies depending on, for example, the composition ratio and production conditions of the resin composition, the type and production method of the (b) component and the (b ′) component.
- the present inventors have found that the improvement of the weld strength, which is the object of the present invention, is achieved under the conditions satisfying the relational expression (1).
- the value of the relational expression (2) is preferably 4 or more, more preferably 5 or more.
- Abwt% is the weight ratio of the (meth) acrylonitrile monomer unit to the total weight of the styrene monomer unit + (meth) acrylonitrile monomer unit constituting the component (b)
- Ab'wt% indicates the weight ratio of the (meth) acrylonitrile monomer unit to the total weight of the styrene monomer unit + (meth) acrylonitrile monomer unit constituting the component (b).
- the AS domain derived from the component (b) and the AS domain derived from the component (b') It tends to be difficult to form a large AS domain that is difficult to dissolve, and it is easy to satisfy the relational expression (1).
- the weight ratio Abwt% of the (meth) acrylonitrile monomer in the component (b) is 26 wt%
- the weight ratio of the (meth) acrylonitrile monomer in the component (b ') is also From the viewpoint of compatibility, it is common to use the same, that is, Ab'wt% of about 26wt%.
- the AS domain is used. Dispersibility was improved, and as a result, it became possible to develop high weld strength. Furthermore, even in the case of a resin composition containing an inorganic filler that is usually considered to have a reduced strength, it is possible to maintain a high weld strength.
- an electron micrograph of the composition dyed as described above is image-processed, and the average occupied area Sd of the AS domain dispersed in the polycarbonate resin matrix and the AS
- the procedure for measuring the average occupied area Sg of rubber particles dispersed in the domain is roughly as follows.
- An electron micrograph (analog information) is digitized to obtain monochrome image information.
- the specific information to be extracted is the information about the shape and size of the outline of (B) light AS domain or (C) dark rubber particles that can measure the area occupied by individual AS domains or rubber particles. It is.
- (3) The occupied area of each AS domain or rubber particle is measured from the measurement image information, and the average occupied area (Sd) or (Sg), which is the number average, is calculated.
- the average occupation of the AS domain dispersed in the composition and the rubber particles dispersed in the AS domain, measured by image processing of an electron micrograph of the composition is measured. If the areas Sd and Sg satisfy the prescribed requirements, there are no particular restrictions, for example, aromatic polycarbonate resin, (b), (b ') two styrene Z (meth) acrylonitrile copolymers, phosphorus Flame retardant, polytetrafluoroethylene batch melt kneading method, aromatic polycarbonate resin, 2 types of styrene Z (meth) acrylonitrile copolymer and polytetrafluoroethylene kneaded in advance, flame retardant And a method of kneading and kneading from the middle of the extruder.
- the average occupancy depends on the type and production method of the two types of styrene Z (meth) acrylonitrile polymers to be blended with the aromatic polycarbonate resin (b) and (b).
- the area Sg can be adjusted, and the weight ratio of the (meth) acrylonitrile monomer unit to the total weight of the styrene monomer unit + (meth) acrylonitrile monomer unit constituting the component (b) ( (A bwt%) and the weight ratio of (meth) acrylonitrile monomer units to the total weight of the styrene monomer units + (meth) acrylonitrile monomer units constituting the component (b ') (A b 'wt%) 1S It is preferable to satisfy the following relational expression (3).
- the value of the relational expression (3) is preferably 4 or more, more preferably 5 or more.
- the polycarbonate resin composition of the present invention may contain an ultraviolet absorber, an acid salt, if necessary.
- Add additives such as stabilizers such as inhibitors, pigments, dyes, lubricants, mold release agents, plasticizers, antistatic agents, slidability improvers, elastomers, compatibilizers, and other flame retardants. You can. These addition methods can be appropriately added by a conventionally known method utilizing these characteristics.
- thermoplastic resins such as polyester resins such as polybutylene terephthalate and polyethylene terephthalate, polyamide resin, polyphenylene ether resin and polyolefin resin can be blended.
- the blending amount of the thermoplastic resin other than the aromatic polycarbonate resin and the two styrene Z (meth) acrylonitrile copolymers is preferably 40% by weight or less, more preferably 30% by weight of the thermoplastic resin composition. % Or less.
- the polycarbonate resin composition of the present invention is preferably a non-halogen polycarbonate resin composition, and the components blended in the composition of the present invention are each non-halogen or have a halogen content. A small amount of corrosion is preferred from the viewpoint of environmental problems.
- the method of molding the polycarbonate resin composition of the present invention is not particularly limited, and is a molding method generally used for thermoplastic resin, that is, injection molding, hollow molding, extrusion molding, press molding.
- molding methods such as sheet molding, thermoforming, rotational molding, and lamination molding can be applied, and among these, injection molding is preferably used.
- Polycarbonate resin 1 Poly 4,4 isopropylidene diphenyl carbonate
- PC-2 viscosity average molecule Amount 22000.
- ABS resin emulsion polymerization ABS resin, rubber-type polybutadiene, "D” manufactured by Technopolymer Co., Ltd.
- AS resin—1 AS resin, “SAN-T” manufactured by Technopolymer Co., Ltd., AN ratio 34%
- AS resin 2 AS resin, “SAN-R” manufactured by Technopolymer Co., Ltd., AN ratio 20%
- AS resin 3 AS resin, “SAN-C” manufactured by Technopolymer Co., Ltd., AN ratio 26%
- Fluidity Using a bar flow mold (thickness 2 mm, width 20 mm, ⁇ 1.5 mm pin gate) The flow length was measured under the conditions of a cylinder set temperature of 240 ° C, a mold set temperature of 60 ° C, an injection pressure of 100 MPa, an injection time of 5 seconds, and a molding cycle of 45 seconds (unit: mm).
- a slice was cut out from the sample pellet so that a surface perpendicular to the direction appeared as an end surface at the center in the strand direction.
- an ultra-thin section was prepared by cutting with a diamond knife with an ultramicrotome (LEICA, ULTRACUT UCT) equipped with a sample cooling device (cryo unit).
- the set cutting conditions are a sample room temperature of 100 ° C and an ultrathin slice thickness lOOnm.
- Ultrathin sections were loaded onto a copper grid and then stained in two steps with osmium tetroxide and ruthenium tetroxide.
- polycarbonate is a gray matrix (A)
- styrene Z (meth) acrylonitrile copolymer is a light colored domain
- butadiene rubber is It will be observed as a dark discontinuous phase (C) in the light colored domain.
- Images recorded on negative film by photography were digitized with a film scanner (Co-Minol Photo Imaging, Dimage Scan Multi F-3000). Digitization was performed at 564 dpi, and a monochrome image file of approximately 1240 x 1800 pixels was obtained.
- the obtained monochrome image file is processed using Adobe's “PhotoShop” (Ver. 7), the AS domain is extracted, and the binary image is input (see attached Fig. 2 or Fig. 5) Create did.
- the criteria for AS domain extraction and binary labeling are as follows: (1) As a result of the above-mentioned two-stage staining (B) What is observed as a light-colored domain is extracted as an “AS domain”. At that time, (B) dark rubber particles existing in the light domain (C) are also included in the area occupied by the “AS domain”. (2) The threshold value of binary value ⁇ is set to an appropriate brightness so that only the light color of ⁇ AS domain '' is selected, and the darker (A) gray matrix and (C) dark rubber particles are not selected. Set to value.
- the area occupied by the AS domain was measured using “ImagePro Plus J (ver4.0)” manufactured by MediaCybernetics. The length on the screen was recorded at the time of shooting for each measurement. Based on the scale, the calibration was performed and the measurement was performed within the dashed frame in the figure. The average value was calculated as the average occupied area Sd, and domains with a measured occupied area of 0.01 ⁇ m 2 or less were excluded from the calculation of the number average value.
- the obtained monochrome image file is processed using Adobe's “PhotoShop” (Ver. 7), rubber particles are extracted and binarized, and the measurement image (see attached Fig. 3 or Fig. 6) It was created.
- the criteria for extraction and binarization of the rubber particles are as follows: (1) The result of the above-mentioned two-stage dyeing (C) What was observed as a dark discontinuous phase is extracted as “rubber particles”. At that time, (B) light domain existing inside (C) is also included in the area occupied by “rubber particles”. (2) The threshold for binarization is set to an appropriate brightness value so that only the dark color of ⁇ rubber particles '' is selected and the brighter (A) gray matrix and (B) light domain are not selected. Set.
- the area occupied by rubber particles was measured using “Image Pro PlusJ (ver4.0)” manufactured by Media Cybernetics. The length on the screen was measured at the time of shooting each image. Based on the recorded scale, the calibration was performed, and the measurement was performed within the broken line frame in the figure. The number average value was calculated as the average occupied area Sg, and particles with a measured occupied area of 0.01 ⁇ m 2 or less were excluded from the calculation of the number average value.
- Aromatic polycarbonate resin component + (b) Styrene Z (meth) acrylonitrile copolymer component obtained by polymerizing at least styrene monomer and (meth) acrylonitrile monomer in the presence of rubber + (b,) Above the total weight of styrene Z (meth) acrylonitrile copolymer component obtained by polymerizing at least a styrene monomer and a (meth) atari mouth nitrile monomer in the absence of rubber.
- the blending ratio of each of the components (a) to (e) is a composition that does not satisfy the formula (1) even if the composition satisfies the predetermined requirement of the present invention. Indicates a low retention rate.
- the (meth) acrylonitrile monomer unit relative to the total weight of the styrene monomer unit + (meth) acrylonitrile monomer unit constituting the component (b) Weight ratio (Abwt%) and weight ratio of (meth) acrylonitrile monomer unit to total weight of styrene monomer unit + (meth) acrylonitrile monomer unit constituting component (b ') ( Ab 'wt%) force This can be achieved by satisfying the following relational expression (3).
- Example 3 Using the pellets obtained in Example 3 and Comparative Example 2, a box shape with outer dimensions of 150mm x 150mm x 20mm and wall thickness of 2mm, a die with a 4-point pin gate of ⁇ 1.5mm (coordinates of gate position) Were injection molded on a 150 mm XI 50 mm surface at 25 mm, 75 mm; 75 mm, 25 mm; 75 mm, 125 mm; 125 mm, 75 mm). None of the molded articles from Example 3 had any problems in appearance, warpage, and rigidity including welds. However, the molded product from Comparative Example 2 had a poor weld appearance and was broken at the weld when force was applied.
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WO2016042426A1 (en) * | 2014-09-19 | 2016-03-24 | Sabic Global Technologies B.V. | Flame retardant blended polycarbonate compositions with improved surface appearance |
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KR100877291B1 (ko) * | 2007-11-19 | 2009-01-07 | 제일모직주식회사 | 비할로겐계 난연성 폴리카보네이트계 수지 조성물 |
KR100937820B1 (ko) * | 2009-10-28 | 2010-01-20 | 주식회사 엘지화학 | 우수한 웰드강도를 갖는 폴리카보네이트 수지 조성물 |
KR101743330B1 (ko) * | 2014-09-30 | 2017-06-16 | 롯데첨단소재(주) | 난연성 열가소성 수지 조성물 및 이를 포함하는 성형품 |
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JP2003535182A (ja) * | 2000-06-02 | 2003-11-25 | バイエル アクチェンゲゼルシャフト | 難燃性の帯電防止性ポリカーボネート成形用組成物 |
JP2004002897A (ja) * | 2003-08-29 | 2004-01-08 | Techno Polymer Co Ltd | トレー用熱可塑性樹脂組成物 |
JP2004035587A (ja) * | 2002-06-28 | 2004-02-05 | Idemitsu Petrochem Co Ltd | ポリカーボネート樹脂組成物及び成形品 |
JP2004059898A (ja) * | 2002-06-05 | 2004-02-26 | Mitsubishi Engineering Plastics Corp | ポリカーボネート樹脂組成物及び成形品 |
JP2006002044A (ja) * | 2004-06-17 | 2006-01-05 | Mitsubishi Engineering Plastics Corp | ポリカーボネート樹脂組成物及びその成形品 |
JP2006036877A (ja) * | 2004-07-26 | 2006-02-09 | Teijin Chem Ltd | 難燃性樹脂組成物およびその成形品 |
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JP2003535182A (ja) * | 2000-06-02 | 2003-11-25 | バイエル アクチェンゲゼルシャフト | 難燃性の帯電防止性ポリカーボネート成形用組成物 |
JP2004059898A (ja) * | 2002-06-05 | 2004-02-26 | Mitsubishi Engineering Plastics Corp | ポリカーボネート樹脂組成物及び成形品 |
JP2004035587A (ja) * | 2002-06-28 | 2004-02-05 | Idemitsu Petrochem Co Ltd | ポリカーボネート樹脂組成物及び成形品 |
JP2004002897A (ja) * | 2003-08-29 | 2004-01-08 | Techno Polymer Co Ltd | トレー用熱可塑性樹脂組成物 |
JP2006002044A (ja) * | 2004-06-17 | 2006-01-05 | Mitsubishi Engineering Plastics Corp | ポリカーボネート樹脂組成物及びその成形品 |
JP2006036877A (ja) * | 2004-07-26 | 2006-02-09 | Teijin Chem Ltd | 難燃性樹脂組成物およびその成形品 |
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WO2016042426A1 (en) * | 2014-09-19 | 2016-03-24 | Sabic Global Technologies B.V. | Flame retardant blended polycarbonate compositions with improved surface appearance |
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TWI414558B (zh) | 2013-11-11 |
KR101194557B1 (ko) | 2012-10-25 |
CN101120050A (zh) | 2008-02-06 |
TW200639215A (en) | 2006-11-16 |
KR20070105981A (ko) | 2007-10-31 |
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