WO2020194683A1 - 熱可塑性樹脂組成物 - Google Patents
熱可塑性樹脂組成物 Download PDFInfo
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- WO2020194683A1 WO2020194683A1 PCT/JP2019/013677 JP2019013677W WO2020194683A1 WO 2020194683 A1 WO2020194683 A1 WO 2020194683A1 JP 2019013677 W JP2019013677 W JP 2019013677W WO 2020194683 A1 WO2020194683 A1 WO 2020194683A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D37/00—Stabilising vehicle bodies without controlling suspension arrangements
- B62D37/02—Stabilising vehicle bodies without controlling suspension arrangements by aerodynamic means
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
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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
- C08L25/12—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
- 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
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
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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
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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
Definitions
- the present invention relates to a thermoplastic resin composition.
- the present invention preferably relates to a thermoplastic resin composition for blow molding.
- the blow molding method has been used mainly for polyolefin resins as a technique for molding hollow molded products, but in recent years, with the development of blow molding technology, it has been applied to a wide variety of resins.
- rubber-reinforced styrene resins for example, ABS resin, AES resin, etc.
- As a resin composition for blow molding using a rubber-reinforced styrene resin for example, the one disclosed in Patent Document 1 is known.
- thermoplastic resin composition used for blow molding is required to have a sufficiently large parison swell, difficult to draw down the parison, and high pinch-off strength of the molded product. Further, for example, a molded product for a vehicle is often required to have heat resistance.
- an object of the present invention is to provide a thermoplastic resin composition capable of forming a molded product having a large swell, excellent drawdown resistance, heat resistance and pinch-off strength when used for blow molding. is there.
- the present inventors have obtained a polycarbonate resin; a specific rubber-reinforced styrene resin; an aromatic vinyl-vinyl cyanide copolymer; a polytetrafluoroethylene; and a specific glycidyl group.
- the thermoplastic resin composition containing each of the copolymers at a specific content when used for blow molding, the molded product has a large swell, excellent draw-down resistance, heat resistance and pinch-off strength. It was found that it can be molded.
- the present invention has been completed based on these findings.
- the present invention is a graft copolymer 3 to 80 parts by mass of (A) a polycarbonate resin and (B) a rubbery polymer graft-polymerized with an aromatic vinyl-based monomer and a vinyl cyanide-based monomer. 35 parts by mass, (C) 3 to 35 parts by mass of aromatic vinyl-vinyl cyanide copolymer (however, the total of (A), (B) and (C) is 100 parts by mass), (D) polytetrafluoro Provided is a thermoplastic resin composition containing 0.05 to 6 parts by mass of ethylene and 0.5 to 5 parts by mass of a copolymer of (E) a glycidyl group-containing monomer and another monomer.
- the weight average molecular weight of the (C) aromatic vinyl-vinyl cyanide copolymer is preferably 250,000 or more.
- the weight average molecular weight of the polycarbonate resin is preferably 17,000 to 35,000.
- the glycidyl group-containing monomer in the copolymer of the glycidyl group-containing monomer and other monomers is preferably glycidyl (meth) acrylate.
- the other monomer in the copolymer of the glycidyl group-containing monomer and the other monomer preferably contains an ⁇ -olefin.
- thermoplastic resin composition is preferably for blow molding.
- the present invention also provides a vehicle spoiler which is a molded product of the above thermoplastic resin composition.
- thermoplastic resin composition of the present invention the parison swell is large and draw resistance is large not only when molding a relatively small size molded product by blow molding but also when molding a relatively large size molded product. It is possible to mold a molded product having excellent down property, heat resistance and pinch-off strength. Therefore, the cured product molded by using the thermoplastic resin composition of the present invention (particularly by blow molding) is excellent in heat resistance and pinch-off strength.
- thermoplastic resin composition of the present invention is a graft copolymer obtained by graft-polymerizing (A) a polycarbonate resin, (B) a rubbery polymer with an aromatic vinyl-based monomer and a vinyl cyanide-based monomer, and (C. ) Aromatic vinyl-vinyl cyanide copolymer, (D) polytetrafluoroethylene, and (E) a copolymer of a glycidyl group-containing monomer and other monomers are contained at least.
- A a polycarbonate resin
- B a rubbery polymer with an aromatic vinyl-based monomer and a vinyl cyanide-based monomer
- C. Aromatic vinyl-vinyl cyanide copolymer
- D polytetrafluoroethylene
- E a copolymer of a glycidyl group-containing monomer and other monomers are contained at least.
- the polycarbonate resin (A) is a polymer obtained by a phosgene method in which a dihydroxydiaryl compound is reacted with phosgene, or a transesterification method in which a dihydroxydiaryl compound is reacted with a carbonic acid ester such as diphenyl carbonate.
- A) Polycarbonate has a structural unit derived from a dihydroxydiaryl compound. As the polycarbonate resin (A), only one kind may be used, or two or more kinds may be used.
- dihydroxydiaryl compound examples include 2,2-bis (4-hydroxyphenyl) propane [bisphenol A], bis (4-hydroxydiphenyl) methane, bis (4-hydroxyphenyl) phenylmethane, and bis (4-hydroxy).
- Phenyl) diphenylmethane bis (4-hydroxyphenyl) naphthylmethane, bis (4-hydroxyphenyl)-(4-isopropylphenyl) methane, bis (3,5-dimethyl-4-hydroxyphenyl) methane, 1,1-bis (4-Hydrenylphenyl) ethane, 1-naphthyl-1,1-bis (4-hydroxyphenyl) ethane, 1-phenyl-1,1-bis (4-hydroxyphenyl) ethane, 1,2-bis (4-hydroxyphenyl) ethane Hydroxyphenyl) ethane, 2-methyl-1,1-bis (4-hydroxyphenyl) propane, 2,2-bis (3,5-dimethyl-4
- the polycarbonate resin (A) is a dihydroxybenzene compound such as hydroquinone, resorcinol, methylhydroquinone, dipiperidylhydroquinone, 4,4'-dihydroxydiphenyl; or a dihydroxynaphthalene compound such as 1,5-dihydroxynaphthalene or 2,6-dihydroxynaphthalene; Piperazine or the like may be used for polymerization.
- a dihydroxybenzene compound such as hydroquinone, resorcinol, methylhydroquinone, dipiperidylhydroquinone, 4,4'-dihydroxydiphenyl
- a dihydroxynaphthalene compound such as 1,5-dihydroxynaphthalene or 2,6-dihydroxynaphthalene
- Piperazine or the like may be used for polymerization.
- the polycarbonate resin may contain a structural unit derived from a phenol compound having a valence of 3 or more.
- a phenol compound having a valence of 3 or more examples include fluoroglucolcinol, 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) -2-heptene, and 4,6-dimethyl-2,4.
- a polycarbonate branching agent other than the above-mentioned trivalent or higher valent phenolic compound may be used.
- the polycarbonate branching agent include mellitic acid, trimellitic acid, trimellitic chloride, trimellitic anhydride, gallic acid, gallic acid n-propyl, protocatechuic acid, pyromeritic acid, pyromeritic acid dianhydride, and ⁇ -resorcinic acid.
- ⁇ -Resorcinic acid, resorcinaldehyde isatinbis (o-cresol), benzophenone tetracarboxylic acid and the like.
- the weight average molecular weight of the polycarbonate resin (A) is not particularly limited, but is preferably 17,000 to 35,000, more preferably 19000 to 33000, and even more preferably 23000 to 30000. When the weight average molecular weight is within the above range, the swell becomes larger and the blow moldability becomes better. In addition, the drawdown resistance is more excellent.
- the weight average molecular weight can be adjusted by appropriately setting the amount of the molecular weight adjusting agent, catalyst, or the like used.
- the weight average molecular weight can be measured by gel permeation chromatography (GPC) using polystyrene as a standard substance.
- Polycarbonate resin melt flow rate is not particularly limited, 1 ⁇ 57cm 3 / 10min is preferably, more preferably 1 ⁇ 20cm 3 / 10min, more preferably 1 ⁇ 10cm 3 / 10min Is. When the MFR is within the above range, the blow moldability is better.
- the melt flow rate (MFR) referred to here is a value measured under the conditions of a temperature of 300 ° C. and a load of 1.2 kg in accordance with JIS K7210.
- the content of the (A) polycarbonate resin in the thermoplastic resin composition of the present invention is 45 with respect to a total of 100 parts by mass of the (A) polycarbonate resin, (B) graft copolymer, and (C) copolymer. It is ⁇ 80 parts by mass, preferably 50 to 78 parts by mass, and more preferably 60 to 75 parts by mass.
- the content is 45 parts by mass or more, the heat resistance and impact resistance of the molded product are excellent.
- the content is 80 parts by mass or less, the drawdown resistance is excellent.
- (B) Graft copolymer A graft copolymer in which an aromatic vinyl-based monomer and a vinyl cyanide-based monomer are graft-polymerized on a rubbery polymer (hereinafter, may be simply referred to as "(B) graft copolymer”). Is a copolymer obtained by graft-polymerizing a monomer composition containing an aromatic vinyl-based monomer and a vinyl cyanide-based monomer in the presence of a rubbery polymer. (B) As the graft copolymer, only one kind may be used, or two or more kinds may be used.
- the rubbery polymer examples include conjugated diene rubbers such as polybutadiene rubber, styrene-butadiene rubber (SBR), and acrylonitrile-butadiene rubber (NBR); ethylene-propylene rubber and ethylene-propylene-non-conjugated diene (ethylidene norbornene). , Dicyclopentadiene, etc.) Ethylene-propylene rubber such as rubber; acrylic rubber such as polybutyl acrylate rubber; silicone rubber and the like. As the rubbery polymer, only one kind may be used, or two or more kinds may be used.
- conjugated diene rubbers such as polybutadiene rubber, styrene-butadiene rubber (SBR), and acrylonitrile-butadiene rubber (NBR); ethylene-propylene rubber and ethylene-propylene-non-conjugated diene (ethylidene norbornene). , Dicyclopenta
- the acrylic rubber may be a rubber having a core-shell structure.
- rubber having a core-shell structure examples include conjugated diene-based rubber / acrylic-based rubber, silicone-based rubber / acrylic-based rubber, and hard polymer (glass transition temperature of 20 ° C. or higher) / acrylic-based rubber. And so on.
- the hard polymer a monomer component containing at least one selected from the group consisting of aromatic vinyl-based monomers, vinyl cyanide-based monomers, and (meth) acrylic acid ester-based monomers. Examples thereof include a polymer obtained by polymerizing. The glass transition temperature of the hard polymer can be calculated from the FOX formula.
- polybutadiene rubber polybutadiene rubber, styrene-butadiene rubber, ethylene-propylene-diene rubber, and conjugated diene type are used from the viewpoint that the swell when forming a relatively large molded product by blow molding can be made sufficiently large.
- Rubber / acrylic rubber, silicone rubber / acrylic rubber, and hard polymer (glass transition temperature of 20 ° C. or higher) / acrylic rubber are preferable.
- the weight average particle size of the rubbery polymer is not particularly limited, but is preferably 0.1 to 2.0 ⁇ m, more preferably 0.2 to 1.0 ⁇ m from the viewpoint of impact resistance. Further, the weight average particle size of the final rubbery polymer can be adjusted by coagulating and enlarging the rubbery polymer having a weight average particle size of 0.05 to 0.3 ⁇ m.
- the content ratio of the rubbery polymer in the (B) graft copolymer is not particularly limited, but from the viewpoint of physical property balance such as impact resistance and fluidity, the total amount (100% by mass) of the (B) graft copolymer. ), It is preferably 20 to 80% by mass, and more preferably 40 to 70% by mass.
- aromatic vinyl-based monomer constituting the (B) graft copolymer examples include styrene, ⁇ -methylstyrene, paramethylstyrene, bromostyrene and the like. Of these, styrene and ⁇ -methylstyrene are preferable. As the aromatic vinyl-based monomer, only one kind may be used, or two or more kinds may be used.
- Examples of the vinyl cyanide-based monomer constituting the (B) graft copolymer include acrylonitrile, methacrylonitrile, etacrylonitrile, and fumaronitrile. Of these, acrylonitrile and methacrylonitrile are preferable. As the vinyl cyanide-based monomer, only one kind may be used, or two or more kinds may be used.
- the monomer composition graft-polymerized on the rubbery polymer further contains an aromatic vinyl-based monomer and / or other monomer copolymerizable with the vinyl cyanide-based monomer.
- the other monomers include (meth) acrylic acid ester-based monomers, amide-based monomers, and unsaturated carboxylic acid-based monomers.
- the (meth) acrylic acid ester-based monomer include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate.
- amide-based monomer examples include acrylamide and methacrylamide.
- unsaturated carboxylic acid-based monomer examples include acrylic acid, methacrylic acid, maleic acid, fumaric acid, and itaconic acid. As the other monomer, only one kind may be used, or two or more kinds may be used.
- the graft ratio of the (B) graft copolymer is not particularly limited, but is preferably 20 to 150% by mass, more preferably 30 to 100% by mass, from the viewpoint of physical property balance such as impact resistance and fluidity. , More preferably 36 to 75% by mass.
- the reducing viscosity of the acetone-soluble component of the (B) graft copolymer is not particularly limited, but is preferably 0.2 to 1.5 dl / g from the viewpoint of physical property balance such as impact resistance and fluidity. , More preferably 0.3 to 1.0 dl / g.
- the graft ratio and the reduced viscosity of the acetone-soluble component can be determined as follows.
- ⁇ Separation method About 2 g of the (B) graft copolymer and 60 ml of acetone are put into the Erlenmeyer flask and immersed for 24 hours. Then, it is separated into a soluble part and an insoluble part by centrifuging at 15,000 rpm for 30 minutes using a centrifuge. The insoluble matter is obtained by vacuum drying at room temperature for 24 hours. The soluble component is obtained by precipitating the acetone-soluble portion in methanol and drying it in vacuum at room temperature for 24 hours.
- the monomer composition graft-polymerized on the rubbery polymer is not particularly limited, but the aromatic vinyl-based monomer 50 to 90 with respect to the total amount (100% by mass) of the monomer composition.
- Composition ratio of mass%, vinyl cyanide-based monomer 10 to 50% by mass, and other monomers 0 to 40% by mass, aromatic vinyl-based monomer 20 to 70% by mass, vinyl cyanide-based single amount The composition ratio is preferably 10 to 60% by mass of the body, 20 to 70% by mass of the (meth) acrylic acid ester-based monomer, and 0 to 50% by mass of the other monomer.
- the content of the (B) graft copolymer in the thermoplastic resin composition of the present invention is based on 100 parts by mass of the total of (A) polycarbonate resin, (B) graft copolymer, and (C) copolymer. It is 3 to 35 parts by mass, preferably 5 to 30 parts by mass, and more preferably 7 to 25 parts by mass. When the content is 3 parts by mass or more, the impact resistance of the molded product is excellent. When the content is 35 parts by mass or less, the drawdown resistance is excellent.
- the polymerization method of the graft copolymer is not particularly limited, and a known or commonly used method can be adopted.
- it can be produced by an emulsion polymerization method, a suspension polymerization method, a solution polymerization method, a massive polymerization method, or a method in which these are combined.
- the (C) aromatic vinyl-vinyl cyanide copolymer (hereinafter, may be simply referred to as "(C) copolymer”) contains at least an aromatic vinyl-based monomer and a vinyl cyanide-based monomer. It is a copolymer obtained by copolymerizing the containing monomer composition. That is, the (C) copolymer contains at least a structural unit derived from an aromatic vinyl-based monomer and a structural unit derived from a vinyl cyanide-based monomer. As the copolymer (C), only one kind may be used, or two or more kinds may be used.
- the graft copolymer is usually a grafted polymer (b1 component) obtained by grafting a rubbery polymer with a monomer composition containing an aromatic vinyl-based monomer and a vinyl cyanide-based monomer. Is mainly contained, and a copolymer (b2 component) obtained by copolymerizing a monomer composition containing an aromatic vinyl-based monomer and a vinyl cyanide-based monomer not grafted on a rubbery polymer is present. included. Therefore, when the thermoplastic resin composition contains the b2 component together with the (B) graft copolymer, it means that the (C) copolymer is contained.
- aromatic vinyl-based monomer constituting the (C) copolymer examples include styrene, ⁇ -methylstyrene, paramethylstyrene, bromostyrene and the like. Of these, styrene and ⁇ -methylstyrene are preferable. As the aromatic vinyl-based monomer, only one kind may be used, or two or more kinds may be used.
- Examples of the vinyl cyanide-based monomer constituting the (C) copolymer include acrylonitrile, methacrylonitrile, etacrylonitrile, and fumaronitrile. Of these, acrylonitrile and methacrylonitrile are preferable. As the vinyl cyanide-based monomer, only one kind may be used, or two or more kinds may be used.
- the monomer composition constituting the (C) copolymer may further contain an aromatic vinyl-based monomer and / or another monomer copolymerizable with the vinyl cyanide-based monomer.
- Examples of the other monomer include those exemplified and described as other monomers that can be contained in the monomer composition constituting the above-mentioned (B) graft copolymer.
- As the other monomer only one kind may be used, or two or more kinds may be used.
- the monomer composition for forming the (C) copolymer is not particularly limited, but is 50 to 90% by mass of the aromatic vinyl-based monomer with respect to the total amount (100% by mass) of the monomer composition. %, 10 to 50% by mass of vinyl cyanide monomer, and 0 to 40% by mass of other monomers, 20 to 70% by mass of aromatic vinyl monomer, vinyl cyanide monomer.
- the composition ratio is preferably 10 to 60% by mass, 20 to 70% by mass of the (meth) acrylic acid ester-based monomer, and 0 to 50% by mass of other monomers.
- the weight average molecular weight of the (C) copolymer is not particularly limited, but is preferably 250,000 or more (for example, 250,000 to 400,000), and more preferably 300,000 or more (for example, 300,000 to 350,000). When the weight average molecular weight is 250,000 or more, the swell becomes larger and the drawdown resistance becomes better.
- the weight average molecular weight can be measured by gel permeation chromatography (GPC) using polystyrene as a standard substance.
- the reduction viscosity of the acetone-soluble component of the (C) copolymer is not particularly limited, but is preferably 0.95 to 1.42 dl / g, more preferably, from the viewpoint of improving the drawdown resistance. Is 1.05 to 1.28 dl / g.
- the reduced viscosity can be measured in the same manner as the reduced viscosity of the acetone-soluble component of the (B) graft copolymer.
- the content of the (C) copolymer in the thermoplastic resin composition of the present invention is based on 100 parts by mass of the total of (A) polycarbonate resin, (B) graft copolymer, and (C) copolymer. It is 3 to 35 parts by mass, preferably 530 parts by mass, and more preferably 7 to 25 parts by mass. When the content is 3 parts by mass or more, the impact resistance of the molded product is excellent. When the content is 35 parts by mass or less, the drawdown resistance is excellent.
- the method for polymerizing the copolymer is not particularly limited, and a known or commonly used method can be adopted.
- it can be produced by an emulsion polymerization method, a suspension polymerization method, a solution polymerization method, a massive polymerization method, or a method in which these are combined.
- (D) Polytetrafluoroethylene is a polymer composed of tetrafluoroethylene as a main monomer, and is a polymer containing at least a structural unit derived from tetrafluoroethylene.
- As the (D) polytetrafluoroethylene only one kind may be used, or two or more kinds may be used.
- the content of (D) polytetrafluoroethylene in the thermoplastic resin composition of the present invention is 100 parts by mass in total of (A) polycarbonate resin, (B) graft copolymer, and (C) copolymer. , 0.05 to 6 parts by mass, preferably 0.1 to 5 parts by mass, and more preferably 0.3 to 2 parts by mass.
- the content is 0.05 parts by mass or more, the swell becomes sufficiently large even when a relatively large molded product is molded.
- the content is 6 parts by mass or less, the dispersibility of (D) polytetrafluoroethylene in the thermoplastic resin composition becomes good, and pellets can be easily obtained by melt-kneading.
- (E) A copolymer of a glycidyl group-containing monomer and another monomer (hereinafter, may be simply referred to as “(E) copolymer”) contains a glycidyl group-containing monomer and a glycidyl group. It is a copolymer obtained by copolymerizing a monomer composition containing at least another monomer copolymerizable with the monomer. That is, the (E) copolymer contains at least a structural unit derived from a glycidyl group-containing monomer and a structural unit derived from other monomers. As the copolymer (E), only one kind may be used, or two or more kinds may be used.
- the thermoplastic resin composition of the present invention contains (E) a copolymer of a glycidyl group-containing monomer and another monomer, whereby (A) a polycarbonate resin, (B) a graft copolymer, and The compatibility of the (C) copolymer is improved, the phase interface is obscured, and the copolymers are in a finely dispersed state. As a result, solidification due to cooling does not occur locally and proceeds uniformly throughout the entire product, so that the adhesiveness of the pinch-off portion is unlikely to decrease, and the pinch-off strength of the molded product becomes good.
- the glycidyl group-containing monomer examples include a monomer containing a radically polymerizable carbon-carbon double bond and a glycidyl group. Specific examples thereof include unsaturated glycidyl ethers such as allyl glycidyl ether, 2-methylallyl glycidyl ether and vinyl glycidyl ether; unsaturated glycidyl esters such as glycidyl (meth) acrylate and (meth) acrylamide containing glycidyl group. .. Of these, glycidyl (meth) acrylate is preferable. As the glycidyl group-containing monomer, only one kind may be used, or two or more kinds may be used.
- Examples of other monomers in the (E) copolymer include ⁇ -olefin, fatty acid vinyl ester, diene-based monomer, aromatic vinyl-based monomer, (meth) acrylic acid alkyl ester, and vinyl alkyl ether. , Vinyl cyanide-based monomer, amino group-containing monomer and the like. Above all, from the viewpoint of further improving the pinch-off strength of the molded product, it is preferable to contain ⁇ -olefin, and it is particularly preferable to contain ⁇ -olefin and fatty acid vinyl ester. As the other monomer, only one kind may be used, or two or more kinds may be used.
- ⁇ -olefins having 2 to 5 carbon atoms such as ethylene, propylene, 1-butene, 1-pentene, and isobutylene are preferable, and ethylene is more preferable.
- Vinyl acetate is preferable as the fatty acid vinyl ester.
- diene-based monomer examples include butadiene, isoprene, chloroprene, phenylpropadiene, cyclopentadiene, dicyclopentadiene, 1,5-norbornadiene, 1,3-cyclohexadiene, 1,4-cyclohexadiene, 1, Examples thereof include 5-cyclooctadiene, 1,3-cyclooctadiene and ⁇ , ⁇ -non-conjugated diene.
- aromatic vinyl-based monomer examples include styrene, ⁇ -methylstyrene, paramethylstyrene, bromostyrene and the like.
- Examples of the (meth) acrylic acid alkyl ester include methyl (meth) acrylic acid, ethyl (meth) acrylic acid, n-butyl (meth) acrylic acid, i-propyl (meth) acrylic acid, and (meth) acrylic acid.
- alkyl esters having 1 to 22 carbon atoms such as t-butyl, 2-ethylhexyl (meth) acrylate, and stearyl (meth) acrylate can be mentioned.
- vinyl alkyl ether examples include vinyl methyl ether, vinyl ethyl ether, vinyl i-propyl ether, vinyl n-propyl ether, vinyl i-butyl ether, vinyl n-amyl ether, vinyl i-amyl ether, and vinyl 2-ethylhexyl.
- vinyl alkyl ether examples include vinyl methyl ether, vinyl ethyl ether, vinyl i-propyl ether, vinyl n-propyl ether, vinyl i-butyl ether, vinyl n-amyl ether, vinyl i-amyl ether, and vinyl 2-ethylhexyl.
- vinyl alkyl ether examples include vinyl methyl ether, vinyl ethyl ether, vinyl i-propyl ether, vinyl n-propyl ether, vinyl i-butyl ether, vinyl n-amyl ether, vinyl i-amyl ether, and vinyl 2-ethyl
- Examples of the vinyl cyanide-based monomer include acrylonitrile, methacrylonitrile, etacrylonitrile, and fumaronitrile.
- Examples of the amino group-containing monomer include acrylamide and methacrylamide.
- Examples of the other monomer include the above-mentioned ones, maleic anhydride di-n-amyl ester, maleic anhydride di-i-butyl ester, maleic anhydride dimethyl ester, maleic anhydride di-n-propyl ester, and maleic anhydride di-.
- Examples thereof include octyl ester, di-nonyl ester of maleic acid, allyl ethyl ether, allyl n-octyl ether, N-phenylmaleimide, N-methylmaleimide, acrylic acid, methacrylic acid, maleic anhydride, maleic anhydride and vinyl chloride.
- the glycidyl group-containing monomer and the other monomers preferably do not have a halogen atom from the viewpoint of more excellent pinch-off strength of the molded product.
- the proportion of the structural unit derived from the glycidyl group-containing monomer in the (E) copolymer is not particularly limited, but (E) 2 to 40% by mass with respect to the total amount (100% by mass) of the copolymer. It is preferable, more preferably 5 to 30% by mass, still more preferably 7 to 20% by mass.
- the proportion of the constituent unit derived from the ⁇ -olefin in the (E) copolymer is not particularly limited, but is preferably 50 to 95% by mass with respect to the total amount (100% by mass) of the (E) copolymer. It is preferably 60 to 90% by mass, more preferably 70 to 85% by mass.
- the proportion of the structural unit derived from the fatty acid vinyl ester in the (E) copolymer is not particularly limited, but is preferably 0.5 to 30% by mass with respect to the total amount (100% by mass) of the (E) copolymer. , More preferably 1 to 20% by mass, still more preferably 2 to 15% by mass.
- the content of the (E) copolymer in the thermoplastic resin composition of the present invention is based on 100 parts by mass of the total of (A) polycarbonate resin, (B) graft copolymer, and (C) copolymer. It is 0.5 to 5 parts by mass, preferably 0.7 to 4 parts by mass, and more preferably 0.8 to 3 parts by mass.
- the content is 0.5 parts by mass or more, the pinch-off strength of the molded product is excellent.
- the content is 5 parts by mass or less, the rigidity of the molded product is excellent. Further, the dispersibility of the (E) copolymer in the thermoplastic resin composition tends to be good.
- thermoplastic resin composition of the present invention may contain other components other than the above-mentioned components as long as the effects of the present invention are not impaired.
- the other components include fluorine-based resins other than (D) polytetrafluoroethylene, polyolefin-based resins, polyamide-based resins, polystyrene-based resins, polyphenylene sulfide-based resins, polyphenylene ether-based resins, polyester-based resins, and polyacetal-based resins.
- resins (other resins) other than (A) to (E) such as resins, polysulfone-based resins, and rubber-like elastic bodies.
- antioxidants heat stabilizers, light stabilizers, lubricants, mold release agents, plasticizers, ultraviolet absorbers, pigments, dyes, antistatic agents, conductivity imparting agents, dispersants, etc.
- compatibilizers antibacterial agents, flame retardants, flame retardant aids, deodorants, reinforcing agents, and fillers.
- the content of the other resins in the thermoplastic resin composition of the present invention is preferably less than 1 part by mass with respect to 100 parts by mass of the polycarbonate resin (A).
- thermoplastic resin composition of the present invention can be produced by mixing the above-mentioned components.
- a known or conventional kneading device such as an extruder, a roll, a Banbury mixer, or a kneader can be used.
- thermoplastic resin composition of the present invention a molded product can be molded by a molding method generally used for thermoplastic resins.
- the molding method include injection molding, blow molding, extrusion molding, vacuum forming, press molding, calendar molding and the like.
- the thermoplastic resin composition of the present invention is preferably injection molded or blow molded from the viewpoint of excellent adhesion between molten resins and pinch-off strength of the molded product after cooling, has a large parison swell, and has drawdown resistance.
- Blow molding is particularly preferable from the viewpoint of being able to mold a molded product having excellent heat resistance and pinch-off strength.
- thermoplastic resin composition with a parison or a sheet at 200 ° C. or higher.
- gases such as nitrogen, carbon dioxide, helium, argon, and neon may be used to inflate the parison or sheet.
- thermoplastic resin composition of the present invention is preferably used as a spoiler for vehicles because it can form a molded product having excellent heat resistance and pinch-off strength even when molding a relatively large molded product.
- a molded product can be obtained by molding using the thermoplastic resin composition of the present invention.
- a molded product obtained by using the thermoplastic resin composition of the present invention may be referred to as "a molded product of the present invention".
- the molded product of the present invention is preferably a vehicle spoiler.
- the blending amount shown in the table is a relative blending amount of each component (that is, a blending amount of the active ingredient in each raw material, so-called pure content), and is represented by "parts by mass” unless otherwise specified. Further, "-" indicates that the component is not blended.
- Manufacturing example 1 Manufacturing of graft copolymer 50 parts by mass of coagulated and enlarged styrene-butadiene rubber latex (weight average particle size 0.25 ⁇ m) was charged into a glass reactor in terms of solid content, stirring was started, and nitrogen substitution was performed. After nitrogen substitution, when the temperature inside the tank reached 65 ° C., 0.2 parts by mass of lactose, 0.1 parts by mass of anhydrous sodium pyrophosphate, and 0.005 parts by mass of ferrous sulfate were added to 10 parts by mass of deionized water. After adding the dissolved aqueous solution to the portion, the temperature was raised to 70 ° C.
- the graft ratio of the obtained graft copolymer B was 37.0% by mass, and the reducing viscosity of the acetone-soluble portion was 0.39 dl / g.
- the weight average particle size of the coagulated and hypertrophied styrene-butadiene rubber latex was determined as follows. It was stained with osmium tetroxide (OsO 4 ), dried, and photographed with a transmission electron microscope. The area of 800 rubber particles was measured using an image analysis processing device (device name: "IP-1000PC” manufactured by Asahi Kasei Co., Ltd.), the equivalent circle diameter (diameter) was obtained, and the weight average particle diameter was calculated.
- OsO 4 osmium tetroxide
- the reducing viscosity of the obtained copolymer C by the above method was 1.10 dl / g.
- the weight average molecular weight of the obtained copolymer C by the above-mentioned method was about 320,000.
- thermoplastic resin composition obtained in Examples and Comparative Examples was evaluated as follows.
- thermoplastic resin composition (Example) of the present invention had a large swell during blow molding, and was also excellent in heat resistance and pinch-off strength of the molded product.
- the copolymer E was not blended (Comparative Examples 1 to 4)
- the pinch-off strength was inferior.
- tetrafluoroethylene D was not blended (Comparative Examples 4 and 8)
- the swell was small.
- the blending amount of the polycarbonate resin was large and the blending amounts of the graft copolymer B and the copolymer C were small, the swell was small and the pinch-off strength was inferior (Comparative Example 5).
- thermoplastic resin compositions of Examples 1 to 3 and Comparative Examples 3 and 4 a blow molding machine was used for evaluation, and a parison weight of about 450 g was left to be injected at a parison temperature of 250 ° C. until the parison reached the ground. Time was measured. As a result, in Examples 1 and 2, it took more than 20 seconds for the polycarbonate to reach the ground after being left to inject the polycarbonate, and it was excellent in drawdown resistance, and the weight average molecular weight was in Examples 1 and 2. In Example 3 using a polycarbonate resin slightly lower than that used, it took 10 to 20 seconds, and it was evaluated that the drawdown resistance was above the standard.
- Comparative Examples 3 and 4 it was evaluated that the time required for the parison to reach the ground was less than 10 seconds, which was shorter than that of Example 3, and that the drawdown resistance was inferior to that of Examples 1 to 3. It was. Further, it is presumed that the drawdown resistance of Comparative Examples 5 and 8 is inferior to that of Examples 1 to 3 because the amount of the polycarbonate resin (A) or the graft copolymer (B) is too large.
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Abstract
Description
(A)ポリカーボネート樹脂は、ジヒドロキシジアリール化合物とホスゲンとを反応させるホスゲン法、又はジヒドロキシジアリール化合物とジフェニルカーボネートなどの炭酸エステルとを反応させるエステル交換法によって得られる重合体である。(A)ポリカーボネートは、ジヒドロキシジアリール化合物由来の構成単位を有する。(A)ポリカーボネート樹脂は、一種のみを使用してもよいし、二種以上を使用してもよい。
(B)ゴム質重合体に芳香族ビニル系単量体及びシアン化ビニル系単量体がグラフト重合したグラフト共重合体(以下、単に「(B)グラフト共重合体」と称する場合がある)は、ゴム質重合体の存在下に、芳香族ビニル系単量体及びシアン化ビニル系単量体を含む単量体組成物をグラフト重合させて得られる共重合体である。(B)グラフト共重合体は、一種のみを使用してもよいし、二種以上を使用してもよい。
三角フラスコに(B)グラフト共重合体を約2g、アセトンを60ml投入し、24時間浸漬させる。その後、遠心分離器を用いて15,000rpmで30分間、遠心分離することで可溶部と不溶部に分離する。不溶分は、真空乾燥により常温で一昼夜乾燥させることで得られる。可溶分は、アセトン可溶部をメタノールに沈殿させ、真空乾燥により常温で一昼夜乾燥させることで得られる。
<グラフト率>
グラフト率(%)=(X-Y)/Y×100
X:真空乾燥後のアセトン不溶分量(g)
Y:グラフト共重合体中のゴム質重合体量(g)
<アセトン可溶分の還元粘度(dl/g)>
アセトン可溶分をN,N-ジメチルホルムアミドに溶解し、0.4g/100mlの濃度の溶液とした後、キャノンフェンスケ型粘度管を用い30℃で測定した流下時間より還元粘度を求める。
(C)芳香族ビニル-シアン化ビニル共重合体(以下、単に「(C)共重合体」と称する場合がある)は、芳香族ビニル系単量体及びシアン化ビニル系単量体を少なくとも含む単量体組成物を共重合させて得られる共重合体である。すなわち、(C)共重合体は、芳香族ビニル系単量体に由来する構成単位及びシアン化ビニル系単量体に由来する構成単位を少なくとも含む。(C)共重合体は、一種のみを使用してもよいし、二種以上を使用してもよい。
(D)ポリテトラフルオロエチレンは、テトラフルオロエチレンを主たる単量体として構成された重合体であり、テトラフルオロエチレンに由来する構成単位を少なくとも含む重合体である。(D)ポリテトラフルオロエチレンは、一種のみを使用してもよいし、二種以上を使用してもよい。
(E)グリシジル基含有単量体とその他の単量体との共重合体(以下、単に「(E)共重合体」と称する場合がある)は、グリシジル基含有単量体及びグリシジル基含有単量体と共重合可能なその他の単量体を少なくとも含む単量体組成物を共重合させて得られる共重合体である。すなわち、(E)共重合体は、グリシジル基含有単量体に由来する構成単位及びその他の単量体に由来する構成単位を少なくとも含む。(E)共重合体は、一種のみを使用してもよいし、二種以上を使用してもよい。
<(A)ポリカーボネート樹脂>
ポリカーボネート樹脂A1:ビスフェノールAとホスゲンからなる芳香族ポリカーボネート樹脂(重量平均分子量:29000程度、メルトフローレート:3cm3/10min)
ポリカーボネート樹脂A2:ビスフェノールAとホスゲンからなる芳香族ポリカーボネート樹脂(重量平均分子量:22000程度、メルトフローレート:10cm3/10min)
ポリカーボネート樹脂A3:ビスフェノールAとホスゲンからなる芳香族ポリカーボネート樹脂(重量平均分子量:20000程度、メルトフローレート:15cm3/10min)
<(B)グラフト共重合体>
グラフト共重合体B:製造例1で得られたグラフト共重合体
<(C)共重合体>
共重合体C:製造例2で得られた共重合体
<(D)ポリテトラフルオロエチレン>
ポリテトラフルオロエチレンD:商品名「Shineply SN3300B7」、(Shine Polymer Technology Co., Ltd製)
<(E)共重合体>
共重合体E:商品名「ボンドファースト BF-2B」、住友化学株式会社製(エチレン・グリシジルメタクリレート・酢酸ビニル共重合体(質量比=83/12/5))
<その他>
カルボン酸変性共重合体:製造例3で得られた共重合体
(グラフト共重合体の製造)
ガラスリアクターに、凝集肥大化スチレン-ブタジエンゴムラテックス(重量平均粒子径0.25μm)を固形分換算で50質量部仕込み、撹拌を開始させ、窒素置換を行った。窒素置換後、槽内を昇温し65℃に到達したところで、ラクトース0.2質量部、無水ピロリン酸ナトリウム0.1質量部、及び硫酸第1鉄0.005質量部を脱イオン水10質量部に溶解した水溶液を添加した後に、70℃に昇温した。その後、アクリロニトリル15質量部、スチレン35質量部、ターシャリードデシルメルカプタン0.05質量部、クメンハイドロパーオキサイド0.3重量部の混合液、及びオレイン酸カリウム1.0質量部を脱イオン水20質量部に溶解した乳化剤水溶液を4時間かけて連続的に滴下した。滴下後、3時間保持してグラフト共重合体ラテックスを得た。その後、塩析、脱水、乾燥し、グラフト共重合体Bのパウダーを得た。得られたグラフト共重合体Bのグラフト率は37.0質量%、アセトン可溶部の還元粘度は0.39dl/gであった。また、上記凝集肥大化スチレン-ブタジエンゴムラテックスの重量平均粒子径は下記のように求めた。四酸化オスミウム(OsO4) で染色し、乾燥後に透過型電子顕微鏡で写真撮影した。画像解析処理装置(装置名:旭化成株式会社製「IP-1000PC」)を用いて800個のゴム粒子の面積を計測し、その円相当径(直径)を求め、重量平均粒子径を算出した。
(スチレン-アクリロニトリル共重合体の製造)
窒素置換した反応器にスチレン66.2質量部、アクリロニトリル22.1質量部、エチルベンゼン11.7質量部、及びt-ドデシルメルカプタン0.10質量部からなる単量体成分を含む混合液を連続的に供給して、140℃で重合を行なった。重合液を反応器から予熱器と真空槽よりなる分離回収工程に導き、回収、押出後、共重合体Cを得た。上述の方法により、得られた共重合体Cの還元粘度を測定した結果、還元粘度は1.10dl/gであった。また、上述の方法により、得られた共重合体Cの重量平均分子量を測定した結果、重量平均分子量は約320000であった。
(カルボン酸変性共重合体の製造)
窒素置換したガラスリアクターに、純水120質量部及び過硫酸カリウム0.3質量部を仕込んだ後、攪拌下に65℃に昇温した。その後、スチレン67質量部、アクリロニトリル30質量部、メタクリル酸3質量部、及びt-ドデシルメルカプタン1.5質量部からなる単量体成分を含む混合液、並びにドデシルベンゼンスルホン酸ナトリウム2質量部を含む乳化剤水溶液30部を各々5時間に亘って連続添加し、その後重合系を70℃に昇温し、3時間熟成して重合を完結した。その後、塩化カルシウムを用いて塩析、脱水・乾燥し、カルボン酸変性共重合体を得た。得られた共重合体の還元粘度は0.31であった。
表に示す各成分を表に記載の配合割合で混合した後、40mm二軸押出機を用いて240℃にて溶融混練してペレット化し、熱可塑性樹脂組成物を得た。
実施例及び比較例で得られた各熱可塑性樹脂組成物について以下の通り評価した。
キャピラリーレオメーターを評価に用い、温度条件240℃、ダイス径2mm、せん断速度600/sの条件でストランド径及びダイ径を測定し、下記式1よりスウェル比を求め、以下の判断基準でスウェル比を評価した。
○:スウェル比125%以上
△:スウェル比120%以上125%未満
×:スウェル比120%未満
スウェル比(%)=ストランド径/ダイ径×100・・・式1
射出成形機でリブ付き試験片(縦×横×厚み×リブ高さ×リブ厚み=150×30×3×10×4mm)を2つ作製し、縦×横=30×30mmに切り出した。2つの試験片を90℃、4時間乾燥機で乾燥した後に、熱板溶着試験機の条件を温度240℃、押込み量0.6mm、熱源接着時間10secに設定し、試験片のリブ部分を溶融させた。溶融後、3秒間静置し、2つの試験片のリブ同士を20秒間接着させた。十分な冷却後、試験片の接着面を破断させ、破断面を観察し以下の判断基準でピンチオフ強度を評価した。
○:破断面に白化あり
×:破断面に白化なし
ISO294に準拠して試験片を成形し、耐熱性の測定をした。耐熱性はISO75に準拠し、荷重1.8MPaの荷重たわみ温度を測定した。そして、以下の判断基準で耐熱性を評価した。
◎:100℃以上
○:95℃以上100℃未満
×:95℃未満
Claims (7)
- (A)ポリカーボネート樹脂45~80質量部、(B)ゴム質重合体に芳香族ビニル系単量体及びシアン化ビニル系単量体がグラフト重合したグラフト共重合体3~35質量部、(C)芳香族ビニル-シアン化ビニル共重合体3~35質量部(但し、(A)、(B)及び(C)の合計は100質量部)、(D)ポリテトラフルオロエチレン0.05~6質量部、及び(E)グリシジル基含有単量体とその他の単量体との共重合体0.5~5質量部を含有する熱可塑性樹脂組成物。
- (C)芳香族ビニル-シアン化ビニル共重合体の重量平均分子量が250000以上である請求項1に記載の熱可塑性樹脂組成物。
- (A)ポリカーボネート樹脂の重量平均分子量が17000~35000である請求項1又は2に記載の熱可塑性樹脂組成物。
- (E)グリシジル基含有単量体とその他の単量体との共重合体におけるグリシジル基含有単量体が(メタ)アクリル酸グリシジルである請求項1~3のいずれか1項に記載の熱可塑性樹脂組成物。
- (E)グリシジル基含有単量体とその他の単量体との共重合体におけるその他の単量体がα-オレフィンを含む請求項1~4のいずれか1項に記載の熱可塑性樹脂組成物。
- ブロー成形用である請求項1~5のいずれか1項に記載の熱可塑性樹脂組成物。
- 請求項1~6のいずれか1項に記載の熱可塑性樹脂組成物の成形物である車両用スポイラー。
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