WO2015068739A1 - 自動車内装部品 - Google Patents
自動車内装部品 Download PDFInfo
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- WO2015068739A1 WO2015068739A1 PCT/JP2014/079365 JP2014079365W WO2015068739A1 WO 2015068739 A1 WO2015068739 A1 WO 2015068739A1 JP 2014079365 W JP2014079365 W JP 2014079365W WO 2015068739 A1 WO2015068739 A1 WO 2015068739A1
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Classifications
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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
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
- C08L33/12—Homopolymers or copolymers of methyl methacrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
- C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
- C08F279/04—Vinyl aromatic monomers and nitriles as the only monomers
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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
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Definitions
- the present invention relates to automobile interior parts.
- ABS resin Acrylonitrile-butadiene-styrene copolymer
- Patent Document 1 when an automobile interior part or the like is not to be painted, a material having high heat resistance in addition to a deep design property such as jet blackness and scratch resistance is required.
- the alloy described in Patent Document 1 can obtain jet blackness and scratch resistance, but cannot obtain high heat resistance, so that it is difficult to develop it into automobile interior parts.
- JP 2009-0679970 A Japanese Patent Laying-Open No. 2005-298776
- the present invention has been made in view of the above problems, and has a jet-blackness, scratch resistance, heat resistance, and impact resistance, and has a stable and beautiful appearance without silver and white haze.
- the purpose is to provide parts.
- the present invention is as follows. [1] Including acetone-insoluble matter (A) and acetone-soluble matter (B),
- the content of the acetone insoluble component (A) is 5 to 18% by mass with respect to 100% by mass in total of the acetone insoluble component (A) and the acetone soluble component (B),
- the acetone-insoluble component (A) contains one or more resins having different structural units, and the constituent units of all the resins contained in the acetone-insoluble component (A) have at least a mass average particle size of 0.00.
- the acetone insoluble matter (A) includes a graft copolymer in which at least the unsaturated nitrile monomer unit is grafted to the rubber component unit, The content of the unsaturated nitrile monomer unit contained in the graft copolymer is 15 to 28% by mass based on 100% by mass of all grafted structural units,
- the acetone-soluble component (B) includes one or more resins having different structural units, and the structural units of all resins included in the acetone-soluble component (B) include at least aromatic vinyl unit.
- an automobile interior part having jet blackness, scratch resistance, heat resistance, and impact resistance and having a stable and beautiful appearance free from silver and white haze.
- the present embodiment a mode for carrying out the present invention (hereinafter referred to as “the present embodiment”) will be described in detail.
- the present invention is not limited to this, and various modifications can be made without departing from the gist thereof. Is possible.
- the “monomer” means a polymerizable molecule before constituting the resin
- the “monomer unit” or “unit” means a unit constituting the resin corresponding to a predetermined monomer.
- the automobile interior part is Including acetone-insoluble matter (A) and acetone-soluble matter (B),
- the content of the acetone insoluble component (A) is 5 to 18% by mass with respect to 100% by mass in total of the acetone insoluble component (A) and the acetone soluble component (B),
- the acetone-insoluble component (A) contains one or more resins having different structural units, and the constituent units of all the resins contained in the acetone-insoluble component (A) have at least a mass average particle size of 0.00.
- the acetone insoluble matter (A) includes a graft copolymer in which at least the unsaturated nitrile monomer unit is grafted to the rubber component unit, The content of the unsaturated nitrile monomer unit contained in the graft copolymer is 15 to 28% by mass based on 100% by mass of all grafted structural units,
- the acetone-soluble component (B) includes one or more resins having different structural units, and the structural units of all resins included in the acetone-soluble component (B) include at least aromatic vinyl unit.
- the thermoplastic resin composition according to this embodiment includes an acetone insoluble matter (A).
- the acetone insoluble component (A) includes one or more resins having different structural units, and the structural units of all resins included in the acetone insoluble component (A) include at least a mass average particle size of 0.1 to A 0.35 ⁇ m rubber component unit, an aromatic vinyl monomer unit, and an unsaturated nitrile monomer unit are included.
- acetone insoluble matter (A) refers to a component that is not dissolved in acetone when the thermoplastic resin composition according to this embodiment is dissolved in acetone.
- the acetone insoluble matter (A) can be specified by the method described in Examples.
- the “structural unit of all resins contained in acetone-insoluble matter (A)” refers to all constituent units constituting the resin when the resin contained in acetone-insoluble matter (A) is one kind. In the case where two or more kinds of resins are contained in the acetone insoluble matter (A), it means all the structural units constituting each resin. That is, the resin contained in the acetone-insoluble component (A) is not particularly limited. For example, a resin containing a rubber component unit, a resin containing an aromatic vinyl monomer unit, and an unsaturated nitrile monomer unit may be used.
- a combination of a resin containing a rubber component unit and an aromatic vinyl monomer unit and a resin containing an unsaturated nitrile monomer unit; a resin containing a rubber component unit and an aromatic vinyl monomer A combination of a resin containing a unit and an unsaturated nitrile monomer unit; a combination of a resin containing a rubber component unit and a resin containing an unsaturated nitrile monomer unit and a resin containing an aromatic vinyl monomer unit; rubber Examples thereof include a resin alone containing a component unit, an aromatic vinyl monomer unit, and an unsaturated nitrile monomer unit.
- the rubber component unit is not particularly limited.
- Examples thereof include rubber units; ethylene-propylene rubber units; silicone rubber units; silicone-acrylic composite rubber units; and rubber units composed of hydrogenated products thereof.
- (conjugated) diene rubber units are preferable, and polybutadiene, styrene-butadiene copolymer, acrylonitrile-butadiene copolymer, acrylonitrile-butadiene-styrene copolymer, and styrene-butadiene block copolymer are more preferable.
- a rubber component unit may be used individually by 1 type, or may use 2 or more types together.
- the glass transition temperature of the polymer contained in the rubber component unit is preferably 0 ° C. or lower, more preferably ⁇ 50 ° C. or lower, and further preferably ⁇ 70 ° C. or lower.
- the glass transition temperature can be measured by DSC according to a conventional method.
- the mass average particle diameter of the rubber component unit is 0.1 to 0.35 ⁇ m, preferably 0.12 to 0.33 ⁇ m, more preferably 0.15 to 0.3 ⁇ m.
- mass average particle diameter is 0.1 ⁇ m or more, impact resistance is further improved.
- a mass average particle diameter can be measured by the method as described in an Example.
- the “mass average particle diameter of the rubber component unit” is the size of the rubber component unit, and in the case of a graft copolymer, the graft copolymer portion is excluded.
- the content of the rubber component unit is preferably 30 to 60% by mass, more preferably 35 to 60% by mass, with respect to 100% by mass of the structural units of all resins contained in the acetone insoluble matter (A). More preferably, it is 40 to 55% by mass.
- the content of the rubber component unit is within the above range, the compatibility with the acetone-soluble component (impact etc.) is excellent.
- the rubber unit content can be measured by the method described in Examples.
- the aromatic vinyl monomer unit is not particularly limited.
- the styrene unit, ⁇ -methylstyrene unit, o-methylstyrene unit, p-methylstyrene unit, o-ethylstyrene unit, p-ethylstyrene unit examples thereof include pt-butylstyrene units and vinylnaphthalene units. Of these, styrene units and ⁇ -methylstyrene units are preferred.
- An aromatic vinyl monomer unit may be used individually by 1 type, or may use 2 or more types together.
- the unsaturated nitrile monomer unit is not particularly limited, and examples thereof include an acrylonitrile unit, a methacrylonitrile unit, and an ethacrylonitrile unit. Of these, acrylonitrile units are preferred.
- An unsaturated nitrile monomer unit may be used individually by 1 type, or may use 2 or more types together.
- Other monomer units that can be copolymerized are not particularly limited. For example, unsaturated carboxylic acid alkyl ester monomer units; maleic anhydride units, N-phenylmaleimide units, N-methylmaleimide units and the like N -Substituted maleimide monomer units; glycidyl group-containing monomer units such as glycidyl methacrylate units.
- Other copolymerizable monomer units may be used alone or in combination of two or more.
- the unsaturated carboxylic acid alkyl ester monomer unit is not particularly limited.
- an acrylic acid ester compound unit such as a butyl acrylate unit, an ethyl acrylate unit, a methyl acrylate unit, or a methyl methacrylate unit, and a methacrylic acid ester compound unit; Examples thereof include acrylic acid units such as acid units and methacrylic acid units.
- the copolymerization component in this case is not particularly limited.
- aromatic vinyl monomers such as styrene and ⁇ -methylstyrene; methyl acrylate, ethyl (meth) acrylate, n- (meth) acrylate Propyl, n-butyl (meth) acrylate, t-butyl (meth) acrylate, n-hexyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, (meth) acryl Unsaturated hydroxy acid alkyl esters such as 3-hydroxypropyl acid, 2,3,4,5,6-pentahydroxyhexyl (meth) acrylic acid, and 2,3,4,5-tetrahydroxypentyl (meth) acrylic acid Monomer. These may be used alone or in combination of two or more.
- the acetone insoluble component (A) includes a graft copolymer in which at least an unsaturated nitrile monomer unit is grafted to a rubber component unit.
- the acetone-insoluble component (A) includes a graft copolymer in which at least an aromatic vinyl monomer unit is grafted to a rubber component unit, and an aromatic vinyl monomer unit and an unsaturated nitrile monomer to a rubber component unit. It is preferable to include a graft copolymer in which the units are grafted.
- the polymer grafted to the rubber component unit can also contain other monomer units copolymerizable with the aromatic vinyl monomer and the unsaturated nitrile monomer. By including such a graft copolymer, the compatibility with the acetone-soluble component (matrix) is strong and the impact property tends to be excellent.
- the polymer to be grafted is not particularly limited.
- acrylonitrile-styrene copolymer, acrylonitrile-styrene-butyl acrylate copolymer, and acrylonitrile-styrene-methyl methacrylate copolymer are preferable.
- the content of the unsaturated nitrile monomer unit contained in the graft copolymer is 15 to 28% by mass, preferably 17 to 27% by mass, with respect to 100% by mass of all grafted structural units, More preferably, it is 18 to 25% by mass.
- the content of the unsaturated nitrile monomer unit is 15% by mass or more, impact resistance tends to be further improved.
- the content of the unsaturated nitrile monomer unit is 28% by mass or less, design properties such as jetness tend to be further improved.
- the content of the unsaturated nitrile monomer unit can be measured by the method described in the examples.
- the method for producing the graft copolymer is not particularly limited, and examples thereof include emulsion polymerization, suspension polymerization, bulk polymerization, solution polymerization, and combinations of these polymerization methods.
- emulsion polymerization there is an emulsion graft polymerization method in which a copolymer is graft-polymerized to latex of a rubber component produced by emulsion polymerization. It is possible to adopt any of continuous, batch, and semi-batch methods.
- the ratio (graft ratio) of the copolymer grafted to the rubber component unit produced in the production process of the graft copolymer is preferably 10 to 200% by mass, more preferably 100% by mass with respect to 100% by mass of the rubber component unit. It is 20 to 170% by mass, and more preferably 30 to 100% by mass.
- the graft ratio can be defined by the mass ratio of the copolymer (graft component) grafted to the rubber component unit with respect to 100% by mass of the graft copolymer.
- the graft rate can be measured by the method described in the examples.
- the content of the graft copolymer is preferably 50 to 100% by mass, more preferably 70 to 100% by mass, and further preferably 80 to 100% by mass with respect to 100% by mass of the acetone insoluble matter (A). %.
- the impact property tends to be superior.
- the content of acetone-insoluble component (A) is 5 to 18% by mass, preferably 7 to 18% by mass, with respect to 100% by mass in total of acetone-insoluble component (A) and acetone-soluble component (B). More preferably, it is 10 to 17% by mass.
- the content of the acetone insoluble matter (A) is 5% by mass or more, the impact resistance and the mold releasability are improved. Moreover, scratch resistance and heat resistance improve more because content of an acetone insoluble content (A) is 18 mass% or less.
- Content of acetone insoluble matter (A) can be measured by the method as described in an Example.
- the thermoplastic resin composition according to this embodiment includes an acetone-soluble component (B).
- the acetone-soluble component (B) contains one or more resins having different structural units, and the constituent units of all resins contained in the acetone-soluble component (B) include at least an aromatic vinyl monomer. Units, unsaturated nitrile monomer units, methacrylate ester monomer units, and maleimide monomer units are included.
- acetone-soluble component (B) refers to a component dissolved in acetone when the thermoplastic resin composition according to this embodiment is dissolved in acetone.
- the acetone-soluble component (B) can be specified by the method described in Examples.
- the “structural unit of all resins contained in the acetone-soluble component (B)” refers to all constituent units constituting the resin when the resin contained in the acetone-soluble component (B) is one kind. In the case where two or more kinds of resins are contained in the acetone-soluble component (B), it means all the structural units constituting each resin. That is, the resin contained in the acetone-soluble component (B) is not particularly limited.
- a resin containing an aromatic vinyl monomer unit, a resin containing an unsaturated nitrile monomer unit, and a methacrylate ester A combination of a resin containing a monomer unit and a resin containing a maleimide monomer unit; a resin containing an aromatic vinyl monomer unit and an unsaturated nitrile monomer unit, and a methacrylic acid ester monomer unit A resin comprising a maleimide monomer unit; a resin comprising an aromatic vinyl monomer unit and a methacrylate ester monomer unit; a resin comprising an unsaturated nitrile monomer unit; A resin containing an aromatic monomer unit; a resin containing an aromatic vinyl monomer unit and a maleimide monomer unit; a resin containing an unsaturated nitrile monomer unit; A combination of a resin containing a sulfonate monomer unit; a resin containing an aromatic vinyl monomer unit, a resin containing an unsaturated nitrile monomer unit;
- the resin contained in the acetone-soluble component (B) is preferably a mixture of at least two types of copolymers. Two or more types of copolymers are preferably compatible. Whether two or more kinds of copolymers are compatible can be confirmed by determining Tg to be one.
- the aromatic vinyl monomer unit is not particularly limited.
- the styrene unit, ⁇ -methylstyrene unit, o-methylstyrene unit, p-methylstyrene unit, o-ethylstyrene unit, p-ethylstyrene unit examples thereof include pt-butylstyrene units and vinylnaphthalene units. Of these, styrene units and ⁇ -methylstyrene units are preferred.
- An aromatic vinyl monomer unit may be used individually by 1 type, or may use 2 or more types together.
- the unsaturated nitrile monomer unit is not particularly limited, and examples thereof include an acrylonitrile unit, a methacrylonitrile unit, and an ethacrylonitrile unit. Of these, acrylonitrile units are preferred.
- An unsaturated nitrile monomer unit may be used individually by 1 type, or may use 2 or more types together.
- the methacrylic acid ester monomer unit is not particularly limited, and examples thereof include butyl methacrylate unit, ethyl methacrylate unit, methyl methacrylate unit, propyl methacrylate unit, isopropyl methacrylate unit, cyclohexyl methacrylate unit, and phenyl methacrylate. Units, methacrylic acid (2-ethylhexyl) units, methacrylic acid (t-butylcyclohexyl) units, benzyl methacrylate units, methacrylic acid (2,2,2-trifluoroethyl) units, and the like. Of these, methyl methacrylate units are preferred.
- a methacrylic acid ester monomer unit may be used individually by 1 type, or may use 2 or more types together.
- the content of the methacrylic acid ester monomer unit is 45 to 60% by mass, preferably 52 to 58% by mass, with respect to 100% by mass of the constituent units of all resins contained in the acetone-soluble component (B). More preferably, it is 53 to 57% by mass.
- the content of the methacrylic acid ester monomer unit is 45% by mass or more, pencil hardness and scratch resistance are further improved.
- the content of the methacrylic acid ester monomer unit is 60% by mass or less, impact resistance and releasability during molding are further improved.
- the content of the methacrylic acid ester monomer unit can be measured by the method described in Examples.
- the maleimide monomer unit is not particularly limited.
- maleimide unit N-methylmaleimide unit, N-ethylmaleimide unit, N-cyclohexylmaleimide unit, N-phenylmaleimide unit, N- (o-chlorophenyl) maleimide Units, N- (m-chlorophenyl) maleimide units, N- (p-chlorophenyl) maleimide units, and the like.
- N-cyclohexylmaleimide units and N-phenylmaleimide units are preferred.
- the maleimide monomer units may be used alone or in combination of two or more.
- the content of the maleimide monomer unit is preferably 2.5 to 15% by mass, more preferably 5.0% with respect to 100% by mass of the constituent units of all resins contained in the acetone-soluble component (B). It is ⁇ 12.5% by mass, more preferably 7.5 to 10% by mass.
- the content of the maleimide monomer unit is 2.5% by mass or more, the heat resistance tends to be further improved.
- content of a maleimide monomer unit is 15 mass% or less, there exists a tendency which a moldability improves more, a white haze is suppressed more, and an external appearance improves more.
- copolymerizable monomer units include acrylate monomer units.
- the acrylate monomer unit is not particularly limited.
- examples thereof include an acrylic acid (2-ethylhexyl) unit, an acrylic acid (t-butylcyclohexyl) unit, a benzyl acrylate unit, and acrylic acid (2,2,2-trifluoroethyl).
- the combination of resins contained in the acetone-soluble component (B) is not particularly limited.
- the resin contained in the acetone-soluble component (B) may be used alone or in combination of two or more.
- the content of the unsaturated nitrile monomer unit in the vinyl copolymer contained in the acetone-soluble component (B) is preferably 15 to 28% by mass, more preferably 17 to 27% by mass, More preferably, it is 18 to 25% by mass.
- the content of the unsaturated nitrile monomer unit is 15% by mass or more, impact resistance tends to be further improved.
- the content of the unsaturated nitrile monomer unit is 28% by mass or less, compatibility with the methacrylic copolymer contained in the acetone-soluble component (B), design properties such as jet blackness, and the like are further improved. It tends to improve.
- the vinyl copolymer contained in the acetone-soluble component (B) is preferably produced by radical polymerization.
- radical polymerization Although it does not specifically limit as a manufacturing method of a vinyl type copolymer, For example, a block polymerization method, a solution polymerization method, a suspension polymerization method, a block suspension polymerization method, an emulsion polymerization method etc. are mentioned. Of these, bulk polymerization, solution polymerization, and bulk suspension polymerization are preferred.
- the weight average molecular weight of the vinyl copolymer is preferably 60,000 to 300,000, more preferably 80,000 to 200,000, and further preferably 80,000 to 150,000. When the weight average molecular weight of the vinyl copolymer is within the above range, it tends to be more excellent in impact properties and moldability.
- the content of the methacrylic ester monomer unit in the methacrylic copolymer contained in the acetone-soluble component (B) is preferably 75 to 97% by mass, more preferably 75 to 95% by mass, More preferably, it is 80 to 95% by mass.
- the content of the methacrylic acid ester monomer unit is 75% by mass or more, the pencil hardness and jetness tend to be further improved.
- the content of the maleimide monomer unit in the methacrylic copolymer contained in the acetone-soluble component (B) is preferably 3 to 25% by mass, more preferably 5 to 25% by mass, Preferably, it is 5 to 20% by mass.
- the content of the maleimide monomer unit is 3% by mass or more, the heat resistance tends to be further improved.
- the compatibility with the vinyl copolymer contained in the acetone-soluble component (B) and the appearance such as white haze are further improved. Tend to.
- acetone soluble part (B) Although it does not specifically limit as a manufacturing method of the methacrylic copolymer contained in acetone soluble part (B), For example, block polymerization method, solution polymerization method, suspension polymerization method, precipitation polymerization method, emulsion polymerization method, etc. Is mentioned. Of these, bulk polymerization, solution polymerization, and suspension polymerization are preferred.
- the weight average molecular weight of the methacrylic copolymer is preferably 60,000 to 300,000, more preferably 60,000 to 250,000, and even more preferably 70,000 to 230,000. When the weight average molecular weight of the methacrylic copolymer is within the above range, it tends to be more excellent in impact properties and moldability.
- the weight average molecular weight of the vinyl copolymer and the methacrylic copolymer can be measured by the method described in Examples.
- the Vicat softening point according to ISO 306 is preferably 105 to 120 ° C, more preferably 107 to 119 ° C, and further preferably 110 to 119 ° C.
- the heat resistance necessary for automobile interior parts tends to be satisfied.
- Vicat softening point is 120 degrees C or less, designability, such as a moldability and jet black, improves more, white haze is suppressed more, and there exists a tendency for an external appearance property to improve more.
- the Vicat softening point can be measured by the method described in Examples.
- the method for adjusting the Vicat softening point to 105 to 120 ° C. is not particularly limited.
- the method of adding is mentioned.
- the glass transition point of the resin containing a maleimide monomer unit is preferably 150 ° C. or higher, more preferably 165 ° C. or higher, and further preferably 170 ° C. or higher.
- the upper limit of the glass transition point is not particularly limited, but is preferably 220 ° C. or lower. Since the glass transition point is 150 ° C.
- the amount of the resin containing the maleimide monomer unit necessary for adjusting the Vicat softening point to a specific range can be reduced, so that the maleimide monomer unit is included.
- the content of the maleimide monomer unit is preferably 5 to 13% by mass, more preferably 7 to 10% by mass with respect to 100% by mass of the thermoplastic resin composition.
- the content of the maleimide monomer unit is 5% by mass or more, the heat resistance tends to be further improved.
- content of a maleimide-type monomer unit is 13 mass% or less, there exists a tendency which a moldability improves more, a white haze is suppressed more, and an external appearance improves more.
- the lightness (L *) based on JIS Z8722 in the automobile interior part of the present embodiment is preferably 6.5 or less, more preferably 6.2 or less, and even more preferably 6.1 or less.
- the lightness (L *) can be measured by the method described in the examples.
- the method for adjusting the lightness (L *) to 6.5 or less is not particularly limited, and examples thereof include a method for increasing the transparency of the resin contained in the thermoplastic resin composition.
- Methods for increasing the transparency of the thermoplastic resin composition include a method in which a vinyl copolymer and a methacrylic copolymer that can be contained in the acetone-soluble component (B) are compatible, and / or an acetone-insoluble component (A The method of adjusting the mass average particle diameter of the rubber component unit in the specific range is given.
- the ratio of the unsaturated nitrile monomer unit in the vinyl copolymer and the methacrylic copolymer The method of adjusting the ratio of the maleimide-type monomer in a polymer is mentioned.
- the target brightness is achieved by adjusting the mass average particle diameter of the rubber component unit to a predetermined range.
- the pencil hardness according to JIS K5400 is preferably HB or more, more preferably F or more.
- the scratch resistance when the molded body is used in an automobile room tends to be further improved.
- the pencil hardness can be measured by the method described in the examples.
- the method for adjusting the pencil hardness to HB or higher is not particularly limited.
- the method for adjusting the content of methacrylic acid ester monomer units that can be contained in the acetone-soluble component (B). Is mentioned.
- the target pencil hardness is achieved by adjusting these to a specific range.
- the mass reduction rate at 260 ° C. of the thermoplastic resin composition according to the present embodiment is preferably 1% or less, more preferably 0.9% or less, and further preferably 0.8% or less.
- the mass reduction rate represents the rate of mass reduction before and after the test.
- the “mass reduction rate at 260 ° C.” can be measured by the method described in the examples.
- the thermoplastic resin composition according to the present embodiment has an effect that white haze is hardly generated.
- White haze refers to a phenomenon in which an entire molded product or a part of the injection molded product such as jet black appears to be cloudy. This white haze tends to occur in areas where the pressure and temperature of the resin change, etc., and may also occur in the vicinity of a corner having a small thickness and a small radius of curvature, or in the vicinity of a gate or flow end. .
- the cause is considered to be the orientation of the rubber component and the compatibility in the polymer alloy.
- the rubber component unit exists in a spherical shape in the injection molded body, and an egg-like shape in which the spherical shape is extended. Looks different and cloudy.
- the compatibility of the resins varies depending on the resin temperature, so that the resin itself appears cloudy and the molded product appears cloudy.
- the compatibility is generally indicated by phase diagrams (for example, see Practical Polymer Alloy Design 2.3 Compatibility and Phase Diagrams Issued by: Industrial Research Committee).
- the resin composition used in the thermoplastic resin composition of the present embodiment is a LCST (Lower critical solution temperature) type, there is a critical Cloud Point.
- LCST Lower critical solution temperature
- this temperature is significantly higher than the molding temperature, stable compatibility is exhibited, but when the temperature is lower or close to the molding temperature, the compatibility becomes unstable.
- the cause of these problems is ascertained, and the white haze of the molded product can be improved by combining a predetermined rubber particle size and a resin composition having a high Cloud Point.
- thermoplastic resin composition according to this embodiment has an effect that silver is hardly generated.
- “Silver” means water-, volatile matter, cracked gas in the resin, silver-white streaks that are sparkled on the surface of the resin due to the entrainment of air by screw rotation, etc. This is a phenomenon in which the appearance is impaired.
- the thermoplastic resin composition according to this embodiment may contain a sliding aid.
- the purpose of the sliding aid is to impart lubricity to the surface of automobile interior parts.
- the content of the sliding aid is preferably 0.05 to 2% by mass in terms of jetness and impact resistance.
- the sliding aid is not particularly limited, and examples thereof include lubricants such as aliphatic metal salts, polyolefins, polyester elastomers, polyamide elastomers, and the like. Among these, it is preferable to include at least one or more lubricants having a fatty acid metal salt and an amide group or an ester group. By including such a sliding aid, the scratch resistance tends to be further improved.
- a fatty-acid metal salt the salt of the metal and fatty acid containing 1 or more types chosen from sodium, magnesium, calcium, aluminum, and zinc is mentioned.
- a fatty acid metal salt is not particularly limited, and specifically, sodium stearate, magnesium stearate, calcium stearate, aluminum stearate (mono, di, tri), zinc stearate, sodium montanate, montan Examples include calcium acid, calcium ricinoleate, and calcium laurate.
- sodium stearate, magnesium stearate, calcium stearate, and zinc stearate are preferable, stearic acid-based metal salts are more preferable, and calcium stearate is more preferable.
- scratch resistance tends to be further improved.
- Polyolefins are not particularly limited, and examples thereof include compositions produced from at least one of ethylene, propylene, ⁇ -olefin and the like. Polyolefins also include compositions derived from the composition as a raw material. Examples of such polyolefins include, but are not limited to, polypropylene, ethylene-propylene copolymer, polyethylene (high density, low density, linear low density), oxidized polyolefin, graft polymerized polyolefin, etc. Is mentioned.
- oxidized polyolefin wax and polyolefin grafted with styrene resin are preferred in terms of scratch resistance, and more preferably polypropylene wax, polyethylene wax, oxidized polypropylene wax, oxidized polyethylene wax, acrylonitrile-styrene copolymer.
- polypropylene wax polyethylene wax
- oxidized polypropylene wax oxidized polyethylene wax
- acrylonitrile-styrene copolymer graft polyethylene
- styrene polymer graft polypropylene graft polyethylene
- styrene polymer graft polypropylene graft polypropylene
- styrene polymer graft polypropylene graft polyethylene
- the polyester elastomer is not particularly limited.
- a polycondensate of a dicarboxylic acid compound and a dihydroxy compound a polycondensate of an oxycarboxylic acid compound, a ring-opening polycondensate of a lactone compound, or a mixture of these components.
- polyesters obtained from polycondensates and the like Either a homopolyester or a copolyester may be used.
- the dicarboxylic acid compound is not particularly limited.
- terephthalic acid isophthalic acid, phthalic acid, naphthalene-2,6-dicarboxylic acid, naphthalene-2,7-dicarboxylic acid, diphenyl-4,4-dicarboxylic acid
- Aromatic dicarboxylic acids such as diphenoxyethanedicarboxylic acid and sodium 3-sulfoisophthalate
- aliphatic dicarboxylic acids such as 1,4-cyclohexanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid and dicyclohexyl-4,4-dicarboxylic acid
- dicarboxylic acid compounds can also be used in the form of an ester-forming derivative, for example, a lower alcohol ester such as dimethyl ester.
- these dicarboxylic acid compounds can be used alone or in combination of two or more.
- terephthalic acid, isophthalic acid, 1,4-cyclohexanedicarboxylic acid, sebacic acid, adipic acid and dodecanedicarboxylic acid are preferably used from the viewpoint of polymerizability, color tone and impact resistance.
- dihydroxy compound For example, ethylene glycol, propylene glycol, butanediol, neopentyl glycol, butenediol, hydroquinone, resorcin, dihydroxy diphenyl ether, cyclohexane diol, hydroquinone, resorcin, dihydroxy diphenyl ether, cyclohexane diol, 2 , 2-bis (4-hydroxyphenyl) propane and the like; these polyoxyalkylene glycols and their alkyl, alkoxy or halogen-substituted products.
- dihydroxy compounds can be used alone or in combination of two or more.
- the oxycarboxylic acid compound is not particularly limited, and examples thereof include oxybenzoic acid, oxynaphthoic acid, diphenyleneoxycarboxylic acid and the like; and alkyl, alkoxy and halogen substituted products thereof. These oxycarboxylic acid compounds can be used alone or in combination of two or more. A lactone compound such as ⁇ -caprolactone can also be used for the production of a polyester elastomer.
- the polyamide elastomer is not particularly limited, and examples thereof include an aminocarboxylic acid or lactam having 6 or more carbon atoms, or a nylon mn salt having m + n of 12 or more.
- the hard segment of the polyamide elastomer is not particularly limited.
- ⁇ -aminocaproic acid For example, ⁇ -aminocaproic acid, ⁇ -aminoenanoic acid, ⁇ -aminocaprylic acid, ⁇ -aminobergonic acid, ⁇ -aminocapric acid, 11-aminoundecanoic acid, 12- Aminocarboxylic acids such as aminododecanoic acid; lactams such as caprolactam laurolactam; nylon 6,6, nylon 6,10, nylon 6,12, nylon 11,6, nylon 11,10, nylon 12,6, nylon 11, 12, nylon 12,10, nylon 12,12 and the like.
- the soft segment of the polyamide elastomer is not particularly limited.
- examples include polyols such as glycol, block or random copolymer of ethylene oxide and propylene oxide, and block or random copolymer of ethylene oxide and tetrahydrofuran.
- the number average molecular weight of these soft segments is preferably 2.0 ⁇ 10 2 to 6.0 ⁇ 10 3 , more preferably 2.5 ⁇ 10 2 to 4.0 ⁇ 10 3 .
- both ends of poly (alkylene oxide) glycol may be aminated or carboxylated.
- sliding aids a combination of a stearic acid-based metal salt and a wax is particularly preferable in terms of scratch resistance.
- an acid-modified or epoxy-modified modified resin may be mixed for the purpose of improving the compatibility.
- thermoplastic resin composition according to the present embodiment includes a phosphite compound, a hindered phenol compound, a benzotriazole compound, a benzophenone compound, a benzoate compound, and a cyanoacrylate compound as necessary.
- UV absorbers and antioxidants such as higher fatty acids, acid ester compounds, acid amide compounds, and higher alcohols; montanic acid, salts thereof, esters thereof, half esters thereof, stearyl alcohol, stellar amide Release agents such as ethylene wax; anti-coloring agents such as phosphites and hypophosphites; nucleating agents; antistatic agents such as amine compounds, sulfonic acid compounds, and polyether compounds; 3-Phenylenebis (2,6-dimethylphenyl phosphate), tetraphenyl- - phenylene bisphosphate, phenoxyphosphoryl, phosphorus flame retardants such as phenoxyphosphazene; may contain additives such as halogenated flame retardants. From the viewpoint of weather resistance, the content of these additives is preferably 0.05 to 1% by mass.
- the thermoplastic resin composition according to the present embodiment may contain a known colorant.
- a known colorant for example, an inorganic pigment, an organic pigment, a metallic pigment, and dye are mentioned.
- the colorants those in which the color of the automobile interior part is white, black, red are preferably used because they give a particularly high-class feeling to the design of the automobile interior part.
- inorganic pigments include, but are not limited to, titanium oxide, carbon black, titanium yellow, iron oxide pigments, ultramarine, cobalt blue, chromium oxide, spinel green, lead chromate pigments, cadmium pigments, and the like.
- organic pigment examples include, but are not limited to, azo pigments such as azo lake pigments, benzimidazolone pigments, diarylide pigments, and condensed azo pigments; phthalocyanine pigments such as phthalocyanine blue and phthalocyanine green; isoindolinone pigments and quinophthalone pigments Quinacridone pigments, perylene pigments, anthraquinone pigments, perinone pigments, condensed polycyclic pigments such as dioxazine violet, and the like.
- azo pigments such as azo lake pigments, benzimidazolone pigments, diarylide pigments, and condensed azo pigments
- phthalocyanine pigments such as phthalocyanine blue and phthalocyanine green
- isoindolinone pigments and quinophthalone pigments Quinacridone pigments, perylene pigments, anthraquinone pigments, perinone pigments, condensed polycyclic pigment
- the metallic pigment is not particularly limited.
- examples include inorganic polyhedral particles coated with metal by plating or sputtering.
- dye For example, nitroso dye, nitro dye, azo dye, stilbene azo dye, ketoimine dye, triphenylmethane dye, xanthene dye, acridine dye, quinoline dye, methine / polymethine dye, thiazole dye, indamine / Indophenol dye, azine dye, oxazine dye, thiazine dye, sulfur dye, aminoketone / oxyketone dye, anthraquinone dye, indigoid dye, phthalocyanine dye and the like.
- colorants may be used alone or in combination of two or more.
- the addition amount of these colorants is preferably 0.05 to 2% by mass, more preferably 0.1 to 1.5% by mass.
- thermoplastic resin composition Although it does not specifically limit as a manufacturing method of the thermoplastic resin composition which concerns on this embodiment, for example, the method of kneading
- the kneading means is not particularly limited, and examples thereof include an open roll, an intensive mixer, an internal mixer, a kneader, a continuous kneader with a twin-screw rotor, and a mixer such as an extruder. Among these, a single screw or twin screw extruder is generally used.
- the method for supplying the raw material of the thermoplastic resin composition to the melt kneader is not particularly limited.
- all the raw materials may be supplied to the same supply port at once, or the raw materials may be supplied from different supply ports.
- an acetone soluble component (B) is supplied from the main inlet installed on the screw base side, and the auxiliary inlet installed between the main inlet and the tip of the extruder.
- Examples thereof include a method of supplying and melting and kneading a component that becomes an acetone insoluble component (A) from an inlet.
- the preferred melt kneading temperature varies depending on the Vicat softening point according to ISO 306. Specifically, a temperature that is 110 to 180 ° C. higher than the Vicat softening point at the cylinder set temperature is preferable.
- the cylinder set temperature is preferably 30 to 200 ° C.
- the temperature of the kneading zone where melt kneading is performed is preferably 110 to + 180 ° C. higher than the Vicat softening point.
- the melt kneading time is preferably about 0.5 to 5 minutes.
- the volatile content in the resin composition is preferably 1500 ppm or less at the stage of supplying it to the injection molding machine.
- the method for adjusting the volatile content is not particularly limited.
- the volatile content is sucked at a vacuum degree of ⁇ 100 to ⁇ 800 hPa from a vent hole installed between the center of the cylinder of the twin-screw extruder and the tip of the extruder. It is preferable to do.
- the extruded thermoplastic resin composition can be directly cut into pellets, or formed into strands and then cut with a pelletizer to be pelletized.
- the shape of the pellet may be a general shape such as a cylinder, a prism, or a sphere, but a cylinder is preferable.
- the automobile interior part according to this embodiment is made of the thermoplastic resin composition.
- thermoplastic resin composition for example, injection compression molding, gas assist molding by nitrogen gas, carbon dioxide gas, etc., high-speed heat cycle molding which makes mold temperature high, etc. are mentioned. These can be used in combination.
- gas assist molding, high speed heat cycle molding, and a combination of gas assist molding and high speed heat cycle molding are mentioned.
- gas assist molding is generally known injection molding using nitrogen gas or carbon dioxide gas.
- Gas assist molding is not particularly limited, but, for example, a method of injecting a pressurized gas into a molded body after injecting a resin into a mold cavity as disclosed in Japanese Patent Publication No. 57-14968; Japanese Patent No. 3819972 A method of injecting a pressurized gas into a cavity corresponding to one side of a molded body after injecting the resin into a mold cavity as in a gazette or the like; prefilling a thermoplastic resin with a gas as in a patent 3349070 The method of shaping
- molding is mentioned.
- the method of press-fitting pressurized gas into the cavity corresponding to one side of the molded body is preferable.
- gas assist is preferable as the pressure retention for preventing sink marks and warpage.
- the mold of the molded body it is preferable to use a mold finished with a file of # 4000 or more, preferably # 12000 or more.
- the arithmetic average surface roughness Ra of the mold surface is preferably 0.02 ⁇ m or less, and more preferably 0.01 ⁇ m or less.
- a method for adjusting the surface of the mold to the arithmetic average surface roughness Ra is not particularly limited, and there is a method of polishing by an ultrasonic polishing machine or a manual work with a diamond file, a grindstone, a ceramic grindstone, a ruby grindstone, a GC grindstone, or the like. Can be mentioned.
- the steel material of the mold to be used is preferably a quenched and tempered steel of 40 HRC or more, more preferably 50 HRC or more.
- a chrome plated mold may be used, or a chrome plated mold may be used on the polished mold as described above.
- the mold temperature in the injection molding is preferably in the vicinity of the Vicat softening point according to ISO 306, more preferably ⁇ 25 ° C. from the Vicat softening point to + 20 ° C. from the Vicat softening point, and more preferably from the Vicat softening point ⁇ . 15 ° C to + 5 ° C from Vicat softening point.
- transfer property to the cavity surface improves more and it can obtain the automotive interior part excellent in deep jetness.
- the cooling rate of the surface of the molded body that greatly affects the sharpness of the molded body is preferably 1 to 100 ° C./second, more preferably 30 to 90 ° C./second, and further preferably 40 to 80 ° C./second. It is.
- the cylinder set temperature in the injection molding is preferably 105 to 150 ° C. higher than the Vicat softening point according to ISO 306, and more preferably 110 to + 140 ° C. higher than the Vicat softening point.
- a molding method in which the mold temperature is raised or lowered using a mold having a steam pipe or a heating wire built therein, or a molding method using supercritical CO 2 can be preferably used.
- the resin (the kneaded material) at the time of injection molding is preferably molded at a temperature suitable for the resin to be molded.
- a resin temperature of 220 to 260 ° C. is preferable in the case of ABS resin, rubber-modified polystyrene, and methyl methacrylate resin
- a resin temperature of 260 to 300 ° C. is preferable in the case of a resin containing polycarbonate.
- the injection speed is preferably 1 to 50 mm / s, more preferably 3 to 30 mm / s.
- the automobile interior part according to the present embodiment is used for a housing of an unpainted product because it has a deep jetness.
- the “automobile interior part” is a visible design part used in the interior of an automobile.
- a part belonging to a non-impact area that does not require a head impact test is preferable.
- Specific examples of such parts include an indicator cover, a window finisher, a garnish, a molding, and various switches and covers.
- the said thermoplastic resin composition can be used also in another product. Although it does not specifically limit as another product, For example, household products, daily necessities, etc. are preferable, and it is preferable to use especially as a member of the product visible to a consumer and a trader.
- the shape of the automobile interior part is not particularly limited, and examples thereof include a thin shape such as a plate shape, a shape having a three-dimensional thickness, and a polygonal shape in which corners are square to a shape having many curved surfaces. It is done. Further, the size of the automobile interior part is not particularly limited, but for example, from a small shape included in a range of 10 ⁇ 10 ⁇ 10 mm to a large shape included in a range of 1,000 ⁇ 1,000 ⁇ 500. Can be mentioned.
- the sedimentation tube was removed from the rotor, and the supernatant was decanted.
- About 20 mL of acetone was collected with a graduated cylinder, put into a centrifuge tube, sealed with a silicone stopper, and then shaken with a shaker for 1 hour.
- the supernatant was decanted (after shaking for 1 hour), and about 20 mL of acetone was added again and shaken for another hour, and then the mixture was centrifuged again at 20,000 rpm for 50 minutes.
- the sedimentation tube was removed from the rotor, and the supernatant was decanted. Thereafter, the same operation as the second decantation was performed once again.
- “inorganic insoluble matter” refers to, for example, titanium, glass fiber, talc, calcium carbonate, etc. used for the color pigment.
- the reduced viscosity (dl / g) of the following copolymer was measured by the following method.
- the thermoplastic resin is dissolved in acetone, and this is separated into an acetone-soluble component and an acetone-insoluble component by a centrifuge.
- the reduced specific viscosity of the non-grafted component in the thermoplastic resin (non-grafted component) in the thermoplastic resin was determined by using a solution prepared by dissolving 0.25 g of acetone-soluble matter in 50 ml of 2-butanone at 30 ° C. at Cannon- It is obtained by measuring the outflow time in a Fenske type capillary.
- Weight average molecular weight of methacrylic copolymer (Mw) The weight average molecular weight (Mw) of the methacrylic copolymer was measured by gel permeation chromatography (GPC; product name HLC-8220 GPC, manufactured by Tosoh Corporation). The specific conditions were as follows. Using a separation column manufactured by Tosoh Corporation (using three TSKgel-GMH XL ), temperature 38 ° C., solvent tetrahydrofuran, sample concentration 0.1 wt / v%, sampling pitch 1 / 0.4 ( Times / sec).
- the molecular weight of the separated component is calculated by creating a calibration curve using the relationship between the molecular weight of TSK standard polystyrene manufactured by the company and the elution time as a cubic regression curve.
- the specific molecular weight content is calculated by the area ratio.
- the peak top molecular weight is a molecular weight corresponding to an elution time at which the peak height is maximized.
- the lightness (L *) of the surface of the injection-molded product was measured according to machine condition C (de: 8 °) based on JIS Z8722.
- a spectrocolorimeter “CM-2002” manufactured by Konica Minolta was used. Specific conditions were a light source D65, a luminous flux ⁇ 11 mm, and a visual field of 10 °.
- the sample was not particularly limited, but a relatively smooth portion of the injection molded product was used.
- an antifoaming agent made of silicone resin made by Momentive Performance Materials Japan GK, product name TSA737, the same applies hereinafter
- a phenolic antioxidant emulsion Choukyo Yushi Co., Ltd.
- Product name L-673 the same shall apply hereinafter
- a vinyl copolymer (B-1) which is a thermoplastic resin was also obtained.
- the proportions of the graft copolymer (A-1) and the vinyl copolymer (B-1) were 74.9% by mass and 25.1% by mass.
- Table 1 shows the results of analysis of the graft copolymer (A-1) and the vinyl copolymer (B-1).
- graft copolymer (A-3) After adding a silicone resin defoamer and a phenolic antioxidant emulsion to the ABS latex thus obtained, solidify by adding an aqueous aluminum sulfate solution, and after sufficient dehydration and washing with water And dried to obtain a graft copolymer (A-3).
- a vinyl copolymer (B-3) which is a thermoplastic resin was also obtained.
- the proportions of the graft copolymer (A-3) and the vinyl copolymer (B-3) were 75.0% by mass and 25.0% by mass. Table 1 shows the results of analysis of the graft copolymer (A-3) and the vinyl copolymer (B-3).
- graft copolymer (A-4) After adding a silicone resin defoamer and a phenolic antioxidant emulsion to the ABS latex thus obtained, solidify by adding an aqueous aluminum sulfate solution, and after sufficient dehydration and washing with water And dried to obtain a graft copolymer (A-4).
- a vinyl copolymer (B-4) as a thermoplastic resin was also obtained.
- the proportions of the graft copolymer (A-4) and the vinyl copolymer (B-4) were 74.9% by mass and 25.1% by mass.
- Table 1 shows the results of analysis of the graft copolymer (A-4) and the co-vinyl copolymer (B-4).
- the polymerization temperature was 130 ° C., and the same amount of the reaction solution as that of the supply solution was continuously withdrawn so that the filling rate of the reaction solution in the reaction vessel could be maintained at 70% by volume.
- a jacket for temperature control was provided in a portion corresponding to the liquid phase portion of the reaction tank, and the jacket temperature was 128 ° C.
- the extracted reaction solution was introduced into a devolatilization apparatus maintained at 250 ° C. and 10 mmHg, and the unreacted monomer and the organic solvent were degassed and recovered.
- the resulting vinyl copolymer (B-5 ) was recovered as a pellet.
- the results of analyzing the vinyl copolymer (B-5) are shown in Table 1.
- the extracted reaction liquid was introduced into a devolatilization apparatus maintained at 250 ° C. and a high vacuum of 10 mmHg, and the unreacted monomer and organic solvent were degassed and recovered, and the resulting vinyl copolymer (B-6 ) was recovered as a pellet.
- the results of analyzing the vinyl copolymer (B-6) are shown in Table 1.
- the extracted reaction solution was introduced into a devolatilization apparatus maintained at 250 ° C. and a high vacuum of 10 mmHg, and the unreacted monomer and organic solvent were degassed and recovered, and the resulting vinyl copolymer (B-7 ) Was recovered as a pellet.
- Table 1 shows the results of analysis of the vinyl copolymer (B-7).
- the resulting methacrylic copolymer (M-1) was a methyl methacrylate-N-phenylmaleimide-styrene copolymer.
- the results of analysis of the methacrylic copolymer (M-1) are shown in Table 1.
- Example 1 15 parts by mass of graft copolymer (A-1), 5 parts by mass of vinyl copolymer (B-1), 15 parts by mass of vinyl copolymer (B-5), vinyl copolymer (B-6) ) 5 parts by mass, 60 parts by mass of methacrylic copolymer, and 0.5 parts by mass of the colorant (X-1) were mixed, and this was put into the hopper of a twin screw extruder (Coperion's “ZSK-25”). Then, pellets were produced at a cylinder set temperature of 250 ° C., a screw rotation speed of 200 rpm, and a discharge rate of 10 kg / hr.
- the pellets thus prepared were injection molded (“EC100” manufactured by Toshiba Machine Co., Ltd.) at a resin temperature of 250 ° C., a mold temperature of 70 ° C., and an injection speed of 20 mm / s to obtain a 50 mm ⁇ 90 mm ⁇ 2.5 mm flat plate injection molded body. Produced. In addition, when confirming silver, the injection molded object was produced by the method similar to flat plate production except having set the resin temperature to 270 degreeC.
- Examples 2 to 6 Comparative Examples 1 to 7
- Example 2 With the composition shown in Table 2, pellets and injection molded bodies were obtained in the same manner as in Example 1.
- thermoplastic resin composition according to the present invention has jet blackness, scratch resistance, heat resistance, and impact resistance, and gives an injection-molded article having a stable and beautiful appearance without silver or white haze. I understand.
- the automotive interior parts of the present invention have jet blackness, scratch resistance, and heat resistance, have a stable and beautiful appearance without silver or white haze, and have excellent impact resistance, so painting and decoration are required. However, it is economically and environmentally useful because of its excellent design.
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Abstract
Description
〔1〕
アセトン不溶分(A)と、アセトン可溶分(B)と、を含み、
前記アセトン不溶分(A)の含有量が、前記アセトン不溶分(A)及び前記アセトン可溶分(B)の合計100質量%に対して、5~18質量%であり、
前記アセトン不溶分(A)は、構成単位の異なる1種又は2種以上の樹脂を含み、前記アセトン不溶分(A)に含まれる全樹脂の構成単位には、少なくとも、質量平均粒子径0.1~0.35μmのゴム成分単位、芳香族ビニル単量体単位、及び不飽和ニトリル単量体単位が含まれ、
前記アセトン不溶分(A)が、前記ゴム成分単位に、少なくとも前記不飽和ニトリル単量体単位がグラフトされたグラフト共重合体を含み、
該グラフト共重合体に含まれる前記不飽和ニトリル単量体単位の含有量が、グラフトされた全構成単位100質量%に対して、15~28質量%であり、
前記アセトン可溶分(B)は、構成単位の異なる1種又は2種以上の樹脂を含み、前記アセトン可溶分(B)に含まれる全樹脂の構成単位には、少なくとも、芳香族ビニル単量体単位、不飽和ニトリル単量体単位、メタクリル酸エステル単量体単位、及びマレイミド系単量体単位が含まれ、
前記メタクリル酸エステル単量体単位の含有量が、前記アセトン可溶分(B)に含まれる全樹脂の構成単位100質量%に対して、45~60質量%である熱可塑性樹脂組成物からなる、
自動車内装部品。
〔2〕
前記熱可塑性樹脂組成物のISO 306に準拠したビカット軟化点が、105~120℃である、前項〔1〕に記載の自動車内装部品。
〔3〕
前記マレイミド系単量体単位の含有量が、前記熱可塑性樹脂組成物100質量%に対して、5~13質量%である、前項〔1〕又は〔2〕に記載の自動車内装部品。
〔4〕
前記ゴム成分単位が、ジエン系ゴム単位を含む、前項〔1〕~〔3〕のいずれか1項に記載の自動車内装部品。
〔5〕
前記ゴム単位の含有量が、前記アセトン不溶分(A)に含まれる全樹脂の構成単位100質量%に対して、30~60質量%である、前項〔1〕~〔4〕のいずれか1項に記載の自動車内装部品。
本実施形態に係る自動車内装部品は、
アセトン不溶分(A)と、アセトン可溶分(B)と、を含み、
前記アセトン不溶分(A)の含有量が、前記アセトン不溶分(A)及び前記アセトン可溶分(B)の合計100質量%に対して、5~18質量%であり、
前記アセトン不溶分(A)は、構成単位の異なる1種又は2種以上の樹脂を含み、前記アセトン不溶分(A)に含まれる全樹脂の構成単位には、少なくとも、質量平均粒子径0.1~0.35μmのゴム成分単位、芳香族ビニル単量体単位、及び不飽和ニトリル単量体単位が含まれ、
前記アセトン不溶分(A)が、前記ゴム成分単位に、少なくとも前記不飽和ニトリル単量体単位がグラフトされたグラフト共重合体を含み、
該グラフト共重合体に含まれる前記不飽和ニトリル単量体単位の含有量が、グラフトされた全構成単位100質量%に対して、15~28質量%であり、
前記アセトン可溶分(B)は、構成単位の異なる1種又は2種以上の樹脂を含み、前記アセトン可溶分(B)に含まれる全樹脂の構成単位には、少なくとも、芳香族ビニル単量体単位、不飽和ニトリル単量体単位、メタクリル酸エステル単量体単位、及びマレイミド系単量体単位が含まれ、
前記メタクリル酸エステル単量体単位の含有量が、前記アセトン可溶分(B)に含まれる全樹脂の構成単位100質量%に対して、45~60質量%である熱可塑性樹脂組成物からなる。
本実施形態に係る熱可塑性樹脂組成物は、アセトン不溶分(A)を含む。アセトン不溶分(A)は、構成単位の異なる1種又は2種以上の樹脂を含み、アセトン不溶分(A)に含まれる全樹脂の構成単位には、少なくとも、質量平均粒子径0.1~0.35μmのゴム成分単位、芳香族ビニル単量体単位、及び不飽和ニトリル単量体単位が含まれる。
アセトン不溶分(A)は、ゴム成分単位に少なくとも不飽和ニトリル単量体単位がグラフトされたグラフト共重合体を含む。また、アセトン不溶分(A)は、ゴム成分単位に少なくとも芳香族ビニル単量体単位がグラフトされたグラフト共重合体、及びゴム成分単位に芳香族ビニル単量体単位及び不飽和ニトリル単量体単位がグラフトされたグラフト共重合体を含むことが好ましい。ゴム成分単位にグラフトされる重合体は、芳香族ビニル単量体及び不飽和ニトリル単量体と共重合可能な他の単量体単位を含むこともできる。このようなグラフト共重合体を含むことにより、アセトン可溶分(マトリクス)との相溶性が強く、衝撃性が優れる傾向にある。
本実施形態に係る熱可塑性樹脂組成物は、アセトン可溶分(B)を含む。アセトン可溶分(B)は、構成単位の異なる1種又は2種以上の樹脂を含み、アセトン可溶分(B)に含まれる全樹脂の構成単位には、少なくとも、芳香族ビニル単量体単位、不飽和ニトリル単量体単位、メタクリル酸エステル単量体単位、及びマレイミド系単量体単位が含まれる。
アセトン可溶分(B)に含まれる樹脂の組合せとしては、特に限定されないが、例えば、芳香族ビニル単量体単位、不飽和ニトリル単量体単位、及びその他これらと共重合可能な他の単量体単位からなるビニル系共重合体、メタクリル酸エステル単量体単位、マレイミド系単量体単位、及びその他これらと共重合可能な他の単量体単位からなるメタクリル系共重合体の組み合わせが好ましい。アセトン可溶分(B)に含まれる樹脂は、1種単独で用いても、2種以上を併用してもよい。
本実施形態の自動車内装部品においてISO 306に準拠したビカット軟化点は、好ましくは105~120℃であり、より好ましくは107~119℃であり、さらに好ましくは110~119℃である。ビカット軟化点が105℃以上であることにより、自動車内装部品に必要な耐熱性が満たされる傾向にある。また、ビカット軟化点が120℃以下であることにより、成形性及び漆黒等の意匠性がより向上し、白モヤがより抑制され、外観性がより向上する傾向にある。ビカット軟化点は、実施例に記載の方法により測定することができる。
本実施形態に係る熱可塑性樹脂組成物は、摺動補助剤を含有してもよい。摺動補助剤は、自動車内装部品表面に滑性を付与することを目的とするものである。摺動補助剤の含有量は、漆黒性や耐衝撃性の点で0.05~2質量%であることが好ましい。
本実施形態に係る熱可塑性樹脂組成物の製造方法としては、特に限定されないが、例えば、原料を押出機等で混練する方法が挙げられる。混練手段としては、特に限定されないが、例えば、オープンロール、インテシブミキサー、インターナルミキサー、コニーダー、二軸ローター付の連続混練機、押出機等の混和機が挙げられる。このなかでも、単軸、又は二軸押出機が一般的に用いられる。
本実施形態に係る自動車内装部品は、上記熱可塑性樹脂組成物からなる。自動車内装部品の製造方法としては、特に限定されないが、例えば、射出圧縮成形、窒素ガスや炭酸ガス等によるガスアシスト成形、及び金型温度を高温化にする高速ヒートサイクル成形等が挙げられる。これらは組み合わせて用いることができる。好ましくは、ガスアシスト成形、高速ヒートサイクル成形、及びガスアシスト成形と高速ヒートサイクル成形の組合せである。
射出成形体に含まれるアセトン不溶分の含有量は以下の方法により確認した。乾燥した遠沈管を1サンプルにつき2本準備し、遠沈管をデシケーター中で15分以上放冷後、電子天秤で0.1mgまで精秤した。射出成形体から約1gのサンプルを切削し遠沈管に計量し、0.1mgまで精秤した。メスシリンダーでアセトン約20mLを採取し遠沈管に入れ、シリコーン栓をして振とう機で2時間振とうした。振とう後、シリコーン栓に付着しているサンプルは、少量のアセトンを用いて遠沈管内へ落とした。2本の遠沈管を日立高速冷却遠心機のローターへ対角線上にセットし、遠心分離機を操作して、回転数20000rpmで60分間遠心分離した。
上記の方法においてデカンテーションした上澄み液を収集し、アセトン成分を揮発により取り除くことでアセトン可溶分を得た。
乾燥後、デシケーター中で30分以上放冷した。十分に放冷後、得られたアセトン不溶分を電子天秤で0.1mgまで精秤た。以下の式により、アセトン不溶分(A)及びアセトン可溶分(B)の合計100質量%に対するアセトン不溶分の含有量(質量%)を算出した。
アセトン不溶分の含有量(質量%)=[アセトン不溶分量(g)÷サンプル採取量(g)]×100
アセトン不溶分(質量%)=[(無機系不溶分を含むアセトン不溶成分(質量%)-無機系不溶分(質量%))/(100-無機系不溶分(質量%))]×100
ここで、「無機系不溶分」とは、例えば着色顔料に用いられたチタン、ガラスファイバー、タルク、炭酸カルシウム等をいう。
射出成形体からアセトン不溶分(A)を抽出し、60nm±2nmの超薄切片を切り出した。超薄切片をオスミニウム酸を用いて染色した後、透過型電子顕微鏡(TEM;株式会社日立ハイテクノロジーズ製、製品名H-600AB)により観察した。得られたTEM写真を画像解析ソフト(旭化成エンジニアリング株式会社製、製品名A像くん)で解析し、ゴム成分単位の質量平均粒子径を得た。
熱分解ガスクロ法を用いアセトン可溶分(B)の組成分析を行い、アセトン可溶分(B)に含まれる全樹脂の構成単位100質量%に対するメタクリル酸メチル単位の含有量を算出した。
フーリエ変換赤外分光光度計(FT-IR;株式会社パーキンエルマージャパン製、製品名Spectrum One)を用い、アセトン不溶分(A)の組成分析を行い、グラフトされた全構成単位100質量%に対する、グラフト共重合体に含まれる不飽和ニトリル単量体単位の含有量を算出した。
下記グラフト共重合体のグラフト率(%)は、フーリエ変換赤外分光光度計(FT-IR)を用いて得られる吸収ピーク解析により求めた。
下記共重合体の還元粘度(dl/g)は、下記の方法にて測定した。
熱可塑性樹脂をアセトンに溶解し、これを遠心分離機によりアセトン可溶分、及びアセトン不溶分に分離する。熱可塑性樹脂におけるゴム状重合体にグラフトしていない成分(非グラフト成分)の還元比粘度は、アセトン可溶分0.25gを2-ブタノン50mlにて溶解した溶液を、30℃にてCannon-Fenske型毛細管中の流出時間を測定することにより得られる。
メタクリル系共重合体の重量平均分子量(Mw)は、ゲルパーミエーションクロマトグラフィ(GPC;東ソー株式会社製、製品名HLC-8220GPC)により測定した。具体的な条件は、東ソー株式会社製分離カラム(TSKgel-GMHXLを3本使用)を用いて、温度38℃、溶媒テトラヒドロフラン、サンプル濃度0.1wt/v%、サンプリングピッチ1/0.4(回/秒)で行う。分離成分の分子量は、同社製TSK標準ポリスチレンの分子量と溶出時間の関係を3次回帰曲線として検量線を作成し、算出する。特定分子量含有量は、面積比により計算される。ピークトップ分子量は、ピーク高さが最大となる溶出時間に相当する分子量である。
JIS Z8722に準拠した機可条件C(de:8°)により射出成形体表面の明度(L*)を測定した。明度(L*)の測定には、分光測色計「CM-2002」(コニカミノルタ製)を用いた。具体的な条件は、光源D65、光束φ11mm、視野10°とした。サンプルとしては、特に制限はないが射出成形体の比較的平滑な部分を用いた。
射出成形体を用いて、ISO306に準拠したB-120法により測定した。荷重は50N、昇温速度は、120℃/hとした。サンプルは、(幅)20~30mm×(長さ)20~30mm×(厚み)2~4mm程度とした。なお、サンプルの厚みが2mmに満たない場合には、サンプルを何枚か重ねて用いることもできる。
射出成形機(東芝機械株式会社製、製品名EC100S)を用い、シリンダー温度250℃、金型温度60℃にて、ISO294に準じて厚み4mmの多目的試験片A型(ISOダンベル試験片)を成形し、得られた試験片を80mm×10mm×4mmの形状に加工した後、ISO 179に従って所定のサイズのノッチ加工を行い試験した。試験の値は、試験片5本の平均値を用いた。
ペレットを用い、TGA「MTC 1000SA」、「TG-DTA 2000SR」(Bruker社製)にて質量減少率を測定した。具体的には、90℃にて4時間乾燥し、水分を除去した後、100℃/minで260℃まで昇温し、260℃で30分間放置した後、質量を測定した。質量減量率は、試験前の質量(m1)を100%とし、試験後の質量(m2)とした場合、下記式で計算した。
質量減量率(%)=100-m2/m1×100
なお、昇温速度等が特に制限はないが、100℃/minで昇温するのが好ましい。
射出成形体を用い、JIS K5400に準拠し測定した。
射出成形体全体を目視確認した。色調にムラや曇りがない場合を○と評価し、100mmの距離で確認できる場合を△と評価し、500mmの距離で確認できる場合を×と評価した。
270℃にて射出成形体の表面を観察した。シルバーが確認できない場合を○と評価し、100mmの距離で確認できる場合を△と評価し、500mmの距離で確認できる場合を×と評価した。
(グラフト共重合体の製造例1)
重合反応槽に、ポリブタジエンゴムラテックス(日機装(株)社製マイクロトラック粒度分析計「nanotrac150」にて測定した質量平均粒子径=0.25μm、固形分量=50質量%、膨潤指数40%)110質量部、ターシャリードデシルメルカプタン0.1質量部、及び脱イオン水25質量部を加え、気相部を窒素置換した後、55℃に昇温した。続いて、1.5時間かけて70℃まで昇温しながら、アクリロニトリル12質量部、スチレンを48質量部、ターシャリードデシルメルカプタン0.5質量部、クメンハイドロパーオキシド0.15質量部よりなる単量体混合液、及び脱イオン水22質量部にナトリウムホルムアルデヒドスルホキシレート0.2質量部、硫酸第一鉄0.004質量部、エチレンジアミンテトラ酢酸2ナトリウム塩0.04質量部を溶解してなる水溶液を4時間にわたり添加した。添加終了後1時間、重合反応槽を70℃に制御しながら重合反応を完結させた。
重合反応槽に、ポリブタジエンゴムラテックス(日機装(株)社製マイクロトラック粒度分析計「nanotrac150」にて測定した質量平均粒子径=0.32μm、固形分量=50質量%、膨潤指数40%)110質量部、ターシャリードデシルメルカプタン0.1質量部、及び脱イオン水25質量部を加え、気相部を窒素置換した後、55℃に昇温した。続いて、1.5時間かけて70℃まで昇温しながら、アクリロニトリル16.2質量部、スチレンを43.8質量部、ターシャリードデシルメルカプタン0.5質量部、クメンハイドロパーオキシド0.15質量部よりなる単量体混合液、及び脱イオン水22質量部にナトリウムホルムアルデヒドスルホキシレート0.2質量部、硫酸第一鉄0.004質量部、エチレンジアミンテトラ酢酸2ナトリウム塩0.04質量部を溶解してなる水溶液を4時間にわたり添加した。添加終了後1時間、重合反応槽を70℃に制御しながら重合反応を完結させた。
重合反応槽に、ポリブタジエンゴムラテックス(日機装(株)社製マイクロトラック粒度分析計「nanotrac150」にて測定した質量平均粒子径=0.32μm、固形分量=50質量%、膨潤指数40%)110質量部、ターシャリードデシルメルカプタン0.1質量部、及び脱イオン水25質量部を加え、気相部を窒素置換した後、55℃に昇温した。続いて、1.5時間かけて70℃まで昇温しながら、アクリロニトリル18質量部、スチレンを42質量部、ターシャリードデシルメルカプタン0.5質量部、クメンハイドロパーオキシド0.15質量部よりなる単量体混合液、及び脱イオン水22質量部にナトリウムホルムアルデヒドスルホキシレート0.2質量部、硫酸第一鉄0.004質量部、エチレンジアミンテトラ酢酸2ナトリウム塩0.04質量部を溶解してなる水溶液を4時間にわたり添加した。添加終了後1時間、重合反応槽を70℃に制御しながら重合反応を完結させた。
重合反応槽に、ポリブタジエンゴムラテックス(日機装(株)社製マイクロトラック粒度分析計「nanotrac150」にて測定した質量平均粒子径=0.37μm、固形分量=50質量%、膨潤指数40%)110質量部、ターシャリードデシルメルカプタン0.1質量部、及び脱イオン水25質量部を加え、気相部を窒素置換した後、55℃に昇温した。続いて、1.5時間かけて70℃まで昇温しながら、アクリロニトリル18質量部、スチレンを42質量部、ターシャリードデシルメルカプタン0.5質量部、クメンハイドロパーオキシド0.15質量部よりなる単量体混合液、及び脱イオン水22質量部にナトリウムホルムアルデヒドスルホキシレート0.2質量部、硫酸第一鉄0.004質量部、エチレンジアミンテトラ酢酸2ナトリウム塩0.04質量部を溶解してなる水溶液を4時間にわたり添加した。添加終了後1時間、重合反応槽を70℃に制御しながら重合反応を完結させた。
アクリロニトリル13質量部、スチレン52質量部、溶媒としてトルエン35質量部、重合開始剤としてt-ブチルパーオキシ-2-エチルヘキサノエート0.05質量部からなる混合物を、窒素ガスを用いてバブリングさせた後、特許第3664576号の実施例2に記載されたものと同様の二段傾斜パドル型(傾斜角度45度)攪拌翼を供えた内容積150Lの反応槽に、スプレーノズルを用いて連続的に37.5kg/時間の速度で供給した。
アクリロニトリル16質量部、スチレン49質量部、溶媒としてトルエン35質量部、重合開始剤としてt-ブチルパーオキシ-2-エチルヘキサノエート0.05質量部を用い、温調ジャケット温度を129℃とした以外は、ビニル系共重合体の製造例1と同様の方法でビニル系共重合体(B-6)を製造した。
アクリロニトリル21質量部、スチレン47質量部、溶媒としてトルエン32質量部、重合開始剤としてt-ブチルパーオキシ-2-エチルヘキサノエート0.05質量部を用い、温調ジャケット温度を128℃とした以外は、ビニル系共重合体の製造例1と同様の方法でビニル系共重合体(B-7)を製造した。
4枚傾斜パドル翼を取り付けた攪拌機を有する容器に、水2kg、第三リン酸カルシウム65g、炭酸カルシウム39g、ラウリル硫酸ナトリウム0.39gを投入し、混合液を得た。次に、3枚後退翼を取り付けた攪拌機を有する60Lの反応器に水26kgを投入して80℃に昇温し、混合液、及びメタクリル酸メチル19,042g、スチレン1,393g、N-フェニルマレイミド2,787g、ラウロイロパーオキサイド40.64g、及びn-オクチルメルカプタン48.77gを投入した。約75℃を保って懸濁重合を行い、原料投入してから約120分後に発熱ピークが観測された。その後、93℃に1℃/minの速度で昇温した後、120分間熟成し、重合反応を実質終了した。次に、50℃まで冷却して懸濁剤を溶解させるために20質量%硫酸を投入した。次に、重合反応溶液を、1.68mmメッシュの篩にかけて凝集物を除去した上で、水分を濾別し、得られたスラリーを脱水してビーズ状ポリマーを得、得られたビーズ状ポリマーを水洗浄した後、上記と同様に脱水し、更にイオン交換水で洗浄、脱水を繰り返して洗浄し、メタクリル系共重合体(M-1)を得た。得られたメタクリル系共重合体(M-1)は、メタクリル酸メチル-N-フェニルマレイミド-スチレン共重合体であった。メタクリル系共重合体(M-1)を分析した結果を表1に示す。
メタクリル酸メチル18,578g、スチレン1,161g、N-フェニルマレイミド3,019g、アクリル酸メチル464g、ラウロイロパーオキサイド40.32g、及びn-オクチルメルカプタン47.32gとした以外は、メタクリル系共重合体の製造例1と同様の方法でメタクリル系共重合体(M-2)を製造した。得られたメタクリル系共重合体(M-2)は、メタクリル酸メチル-アクリル酸メチル-N-フェニルマレイミド-スチレン共重合体であった。メタクリル系共重合体(M-1)を分析した結果を表1に示す。
メタクリル酸メチル1,523g、スチレン284g、無水マレイン酸163g、ラウロイロパーオキサイド0.99g、及びn-オクチルメルカプタン4.93gとした以外は、メタクリル系共重合体の製造例1と同様の方法でメタクリル系共重合体(M-3)を製造した。得られたメタクリル系共重合体(M-3)は、メタクリル酸メチル-スチレン-無水マレイン酸共重合体であった。メタクリル系共重合体(M-1)を分析した結果を表1に示す。
メタクリル酸メチル22,440g、アクリル酸メチル694g、ラウロイロパーオキサイド46.27g、及びn-オクチルメルカプタン55.52gとした以外は、メタクリル系共重合体の製造例1と同様の方法でメタクリル系共重合体(M-4)を製造した。得られたメタクリル系共重合体(M-4)は、メタクリル酸メチル-アクリル酸メチル共重合体であった。メタクリル系共重合体(M-1)を分析した結果を表1に示す。
メタクリル酸メチル14,482g、スチレン2,758g、N-フェニルマレイミド5,747g、ラウロイロパーオキサイド34.48g、及びn-オクチルメルカプタン43.68gとした以外は、メタクリル系共重合体の製造例1と同様の方法でメタクリル系共重合体(M-5)を製造した。得られたメタクリル系共重合体(M-5)は、メタクリル酸メチル-N-フェニルマレイミド-スチレン共重合体であった。メタクリル系共重合体(M-5)を分析した結果を表1に示す。
三菱カーボンブラック#850(X-1)(商品名)(三菱化学(株)製 カーボンブラック、昇華温度3642℃)
グラフト共重合体(A-1)15質量部、ビニル系共重合体(B-1)5質量部、ビニル系共重合体(B-5)15質量部、ビニル系共重合体(B-6)5質量部、メタクリル系共重合体60質量部、着色剤(X-1)0.5質量部を混合し、これを2軸押出機(Coperion社製「ZSK-25」)のホッパーに投入し、シリンダー設定温度250℃、スクリュー回転数200rpm、吐出量10kg/hrにてペレットを作製した。作製されたペレットを樹脂温度250℃、金型温度70℃、射出速度20mm/sにて射出成形(東芝機械製「EC100」)を行い、50mm×90mm×2.5mmの平板の射出成形体を作製した。なお、シルバーを確認する際には、樹脂温度270℃とした以外は、平板作製と同様の方法で射出成形体を作製した。
表2記載の組成にて、実施例1と同様の方法でペレット、及び射出成形体を得た。
Claims (5)
- アセトン不溶分(A)と、アセトン可溶分(B)と、を含み、
前記アセトン不溶分(A)の含有量が、前記アセトン不溶分(A)及び前記アセトン可溶分(B)の合計100質量%に対して、5~18質量%であり、
前記アセトン不溶分(A)は、構成単位の異なる1種又は2種以上の樹脂を含み、前記アセトン不溶分(A)に含まれる全樹脂の構成単位には、少なくとも、質量平均粒子径0.1~0.35μmのゴム成分単位、芳香族ビニル単量体単位、及び不飽和ニトリル単量体単位が含まれ、
前記アセトン不溶分(A)が、前記ゴム成分単位に、少なくとも前記不飽和ニトリル単量体単位がグラフトされたグラフト共重合体を含み、
該グラフト共重合体に含まれる前記不飽和ニトリル単量体単位の含有量が、グラフトされた全構成単位100質量%に対して、15~28質量%であり、
前記アセトン可溶分(B)は、構成単位の異なる1種又は2種以上の樹脂を含み、前記アセトン可溶分(B)に含まれる全樹脂の構成単位には、少なくとも、芳香族ビニル単量体単位、不飽和ニトリル単量体単位、メタクリル酸エステル単量体単位、及びマレイミド系単量体単位が含まれ、
前記メタクリル酸エステル単量体単位の含有量が、前記アセトン可溶分(B)に含まれる全樹脂の構成単位100質量%に対して、45~60質量%である熱可塑性樹脂組成物からなる、
自動車内装部品。 - 前記熱可塑性樹脂組成物のISO 306に準拠したビカット軟化点が、105~120℃である、請求項1に記載の自動車内装部品。
- 前記マレイミド系単量体単位の含有量が、前記熱可塑性樹脂組成物100質量%に対して、5~13質量%である、請求項1又は2に記載の自動車内装部品。
- 前記ゴム成分単位が、ジエン系ゴム単位を含む、請求項1~3のいずれか1項に記載の自動車内装部品。
- 前記ゴム成分単位の含有量が、前記アセトン不溶分(A)に含まれる全樹脂の構成単位100質量%に対して、30~60質量%である、請求項1~4のいずれか1項に記載の自動車内装部品。
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CN105899601B (zh) | 2018-06-26 |
US9758664B2 (en) | 2017-09-12 |
KR20160052703A (ko) | 2016-05-12 |
JPWO2015068739A1 (ja) | 2017-03-09 |
EP3070122A1 (en) | 2016-09-21 |
JP6165263B2 (ja) | 2017-07-19 |
CN105899601A (zh) | 2016-08-24 |
EP3070122A4 (en) | 2016-11-23 |
KR101811551B1 (ko) | 2017-12-21 |
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US20160264770A1 (en) | 2016-09-15 |
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