WO2005100470A1 - スチレン系熱可塑性樹脂組成物 - Google Patents
スチレン系熱可塑性樹脂組成物 Download PDFInfo
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- WO2005100470A1 WO2005100470A1 PCT/JP2005/007235 JP2005007235W WO2005100470A1 WO 2005100470 A1 WO2005100470 A1 WO 2005100470A1 JP 2005007235 W JP2005007235 W JP 2005007235W WO 2005100470 A1 WO2005100470 A1 WO 2005100470A1
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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
- C08L23/10—Homopolymers or copolymers of propene
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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
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM 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
- 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
- C08L25/10—Copolymers of styrene with conjugated dienes
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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
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
- C08L53/025—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes modified
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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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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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
- 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
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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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
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/083—Copolymers of ethene with aliphatic polyenes, i.e. containing more than one unsaturated bond
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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
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
Definitions
- the present invention has excellent chemical resistance, elongation characteristics, and thermal stability in addition to excellent moldability and rigidity inherent in styrene-based resins, and has a wide temperature range. It is an object of the present invention to provide a styrene-based thermoplastic resin composition having excellent impact strength in the range and excellent durability, and a molded product thereof.
- thermoplastic resin composition in which a propylene resin and an ethylene rubber were dispersed in a continuous phase of a styrene resin under a specific weight ratio was suitable for the purpose.
- the present invention has been accomplished.
- the configuration of the present invention is as follows.
- thermoplastic resin containing (A) a rubber-modified styrene resin, (B) a propylene resin, (C) an ethylene rubber, and (D) a hydrogenated styrene-conjugated gen block copolymer.
- a composition containing (A) a rubber-modified styrene resin, (B) a propylene resin, (C) an ethylene rubber, and (D) a hydrogenated styrene-conjugated gen block copolymer.
- (B) and (C) components are dispersed in a styrene resin which is a continuous phase of the (A) component, separately from rubber particles derived from the (A) component; and
- Equation (1) 0 ⁇ WBZWC ⁇ 0.9
- Equation (2) 0.1 ⁇ (WB + WC) / (WA + WB + WC) ⁇ 0.5
- WA is the weight fraction of (A) rubber-modified styrene resin in the thermoplastic resin composition
- WB is the weight fraction of (B) propylene resin in the thermoplastic resin composition
- WC represents the weight fraction of (C) ethylene-based rubber in the thermoplastic resin composition.
- Equation (3) 0.2 and WBZWC and 0.8
- Equation (4) 0.15 ⁇ (WB + WC) / (WA + WB + WC) ⁇ 0.35 (Where WA is the weight fraction of (A) rubber-modified styrene resin in the thermoplastic resin composition, WB is the weight fraction of (B) propylene resin in the thermoplastic resin composition, The thermoplastic resin composition according to (1), wherein WC satisfies (C) a weight fraction of (C) ethylene rubber in the thermoplastic resin composition.
- thermoplastic resin composition as described in the above.
- thermoplastic resin composition according to any one of (1) to (3), wherein the ethylene rubber is a copolymer of ethylene and at-olefin having 4 to 10 carbon atoms. object.
- thermoplastic resin composition according to any one of (1) to (5), wherein the rubber-modified styrene resin contains 3 to 12% by weight of a rubbery polymer.
- thermoplastic resin composition has a loss tangent tan ⁇ peak in dynamic viscoelasticity measurement in a range of 70 ° C to 140 ° C, any one of (1) to (6).
- Item 10 The thermoplastic resin composition according to item 8.
- thermoplastic resin composition according to any one of (1) to (7), wherein the total amount of the styrene monomer and ethylbenzene in the thermoplastic resin composition is 50 Oppm or less.
- thermoplastic resin composition according to any one of (1) to (8), wherein LZD is 1.1 or more.
- thermoplastic resin composition obtained by molding the thermoplastic resin composition according to any one of (1) to (9), wherein (B) a propylene-based resin and (C) an ethylene-based resin.
- the above molded article wherein the average major axis L of the dispersed phase containing the rubber is 0.5 to: LO / zm, and the ratio LZD of the average major axis L to the average minor axis D is 1.1 or more.
- styrene-based resin which is a continuous phase of component (A) refers to rubber particles of “rubber-modified styrene-based resin” which is component (A).
- the styrene (co) polymer Mean body.
- the styrene-based monomer and the like, which are components of the styrene-based (co) polymer, will be described later.
- thermoplastic resin composition of the present invention and a molded article thereof have excellent chemical resistance, elongation characteristics, and thermal stability in addition to excellent moldability and rigidity inherent in styrene-based resins, and are widely used. Has excellent impact strength in the temperature range (especially at low temperatures) and also has excellent recycled properties
- the rubber-modified styrene resin used as the component (A) in the present invention is obtained by copolymerizing a styrene monomer or another vinyl monomer copolymerizable with the styrene monomer in the presence of the rubbery polymer.
- a commercially available product can be used.
- styrene-based monomer examples include, in addition to the styrene monomer, styrene derivative monomers such as paramethylstyrene, a-methynolestyrene, normal-butynolestyrene, and nucleated halogen styrene. These styrenic monomers may be one kind or a mixture of two or more kinds.
- vinyl monomers copolymerizable with the styrene monomer include, for example, acrylo-tolyl, acrylic acid, methacrylic acid, maleic acid, fumaric acid, maleic anhydride, methyl acrylate , Ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, divinylbenzene, etc.
- Can be One or more of these other bubble monomers may be copolymerized with the above-mentioned styrene-based monomer, which may be used in combination of two or more, in a proportion of 50% by weight or less.
- examples of the rubbery polymer include polybutadiene rubber, styrene butadiene rubber, ethylene-propylene rubber (EPR, EPDM), acrylic rubber, nitrile rubber and the like.
- Polybutadiene rubber or styrene-butadiene rubber is preferable because it can efficiently graft polymerize a styrene-based (co) polymer and is easily bridged to form particulate rubber particles.
- the amount of the rubber-like polymer in the rubber-modified styrenic ⁇ is preferably 3 to 12 weight 0/0. Within this range, the thermoplastic resin composition will have good tensile elongation, and excellent non-strength of impact strength and rigidity.
- the rubber-modified styrenic resin used as the component (A) may optionally contain a non-rubber-modified styrenic resin as necessary.
- the rubber-based polymer is blended in such a manner that the amount of the rubber-like polymer with respect to the total weight of the rubber-modified styrene resin and the rubber non-modified styrene resin after blending is within the above range. Is preferred.
- the rubber particles in the rubber-modified styrenic resin preferably have an area average particle size of 0.1 to 5.0 ⁇ m. Within this range, the tensile elongation of the thermoplastic resin composition and the balance between gloss and rigidity are further improved.
- the form of the rubber particles may be of a core-shell type without any limitation, and may be of a salami type.
- the area average particle diameter Ds of the dispersed rubber particles was determined by taking a transmission electron micrograph of an ultrathin section stained with osmic acid, analyzing the image of at least 200 rubber particles, and analyzing each rubber particle. Area force Calculate the average diameter of circles with the same area.
- the weight average molecular weight Mw of the styrene (co) polymer which is the continuous phase of the thermoplastic resin composition of the present invention is preferably 100,000 or more and 500,000 or less.
- the polypropylene resin used as the component (B) in the present invention is a commercially available product without any particular limitation.
- a homopolymer of propylene, a random polymer of propylene and another monomer, or a block copolymer is used.
- These propylene resins may be used alone or in a mixture of two or more.
- the ethylene rubber used as the component (C) in the present invention is an ethylenic rubber that is not substantially cross-linked, and is composed of ethylene propylene copolymer rubber (EPM) and ethylene propylene non-conjugated Polymerized rubber (EPDM), ethylene ⁇ -olefin copolymer and the like are used.
- EPM ethylene propylene copolymer rubber
- EPDM ethylene propylene non-conjugated Polymerized rubber
- ethylene ⁇ -olefin copolymer ethylene-a-olefin copolymers are preferred, and copolymers of ⁇ -olefins having 4 to 10 carbon atoms with ethylene are particularly preferred. More preferably, an ethylene at olefin copolymer having a density of 0.84 to 0.91 gZcm 3 is preferable.
- thermoplastic resin composition of the present invention has a loss tangent tan ⁇ peak in the range of 70 ° C to -40 ° C when dynamic viscoelasticity is measured.
- This tan ⁇ peak is derived from (C) ethylene rubber and is distinguished from the ta ⁇ ⁇ peak near 100 ° C derived from rubber particles in the rubber-modified styrene resin. In many cases, the tan ⁇ peak of the thermoplastic resin composition shifts to a higher temperature than the peak temperature of the ethylene rubber alone.
- thermoplastic resin composition When a thermoplastic resin composition is used, it is preferable to select an ethylene rubber component that does not shift to a temperature range of 40 ° C. or higher. Having this tan ⁇ peak, the balance between the low-temperature impact strength and the high-temperature stiffness of the thermoplastic resin composition becomes better.
- the hydrogenated styrene-conjugated gen block copolymer used as the component (D) in the present invention mainly comprises a polymer block composed of at least one styrene and at least one conjugated gen compound. It has a polymer block.
- the conjugated conjugate butadiene, isoprene or a mixture thereof is preferably used.
- the styrene-conjugated gen block copolymer hydrogenated product forms an interface between ( ⁇ ) a rubber-modified styrene resin and ( ⁇ ) a propylene resin and (C) dispersed particles which also have an ethylene rubber force. Exists and acts as a compatibilizer.
- thermoplastic resin composition of the present invention need to satisfy the formulas (1) and (2).
- Equation (1) 0 ⁇ WB / WC ⁇ 0.9
- Equation (2) 0.1 ⁇ (WB + WC) / (WA + WB + WC) ⁇ 0.5
- WA is the weight fraction of (A) rubber-modified styrene resin in the thermoplastic resin composition
- WB is the weight fraction of (B) propylene resin in the thermoplastic resin composition
- WC Represents the weight fraction of (C) ethylene-based rubber in the thermoplastic resin composition.
- Equation (1) shows that the ethylene-based rubber (C) has a larger weight fraction than the propylene-based resin (B).
- Formula (1) is preferably 0.1 ⁇ WB / WC ⁇ 0.9, more preferably 0.2 ⁇ WB / WC ⁇ 0.8.
- WBZWC is larger than 0.9, the low-temperature impact strength of the thermoplastic resin composition is poor.
- FIG. 4 shows the relationship between the WBZWC ratio and the plot of critical strain in the thermoplastic resin composition for Examples and Comparative Examples of the present invention. From this relationship, when there is no (B) propylene-based resin, the critical strain value is low and the critical strain value is dramatically increased only by adding a small amount of the component (B).
- Formula (2) represents the weight fraction of components (B) and (C) relative to the total weight of components (A), (B) and (C), and is preferably 0.15 (WB + WC) / (WA + WB + WC) ⁇ 0.4, more preferably 0.15 ⁇ (WB + WC) / (WA + WB + WC) ⁇ 0.35. If (WB + WC) / (WA + WB + WC) exceeds 0.5, the resulting thermoplastic resin composition will have insufficient rigidity, especially high-temperature rigidity. If (WB + WC) Z (WA + WB + WCW O.1), the thermoplastic resin composition will not have sufficient low-temperature impact resistance.
- the amount of (D) styrene-conjugated gen-block copolymer hydrogen additive added is determined by the sum of components (A), (B) and (C).
- the amount is 5 to 20 parts by weight, more preferably 7 to 15 parts by weight, per 100 parts by weight. If the blending ratio of the component (D) is less than 5 parts by weight, physical properties such as impact strength and tensile elongation, which are insufficient for compatibilization of the obtained thermoplastic resin composition, are poor. When the mixing ratio of the component (D) exceeds 20 parts by weight, the rigidity of the thermoplastic resin composition decreases.
- the thermoplastic resin composition of the present invention comprises, in addition to the rubber particles derived from the component (A), (B) a styrene resin which is a continuous phase of a rubber-modified styrene resin. ) A propylene resin and (C) an ethylene rubber component are present as dispersed phases.
- the average length L of the dispersed phase (B) of the propylene resin and (C) the ethylene rubber in the thermoplastic resin composition of the present invention is preferably 0.5 to 10 / zm. When the average major axis L is in this range, the low-temperature impact strength of the thermoplastic resin composition is particularly good. More preferably, it is 1 to 5 m.
- the dispersed phase (B) which is also a propylene-based resin and (C) an ethylene-based rubber has a flat shape, and the ratio LZD of the average major axis L to the average minor axis D may be 1.1 or more. preferable.
- the LZD is 1.1 or more, the thermoplastic resin composition has better low-temperature impact strength and better hinge performance. More preferably, the LZD is 1.5 or more.
- L and LZD were first stained with osmium tetraoxide and then ultrathin sections of a thermoplastic resin composition (pellet or molded article) stained with ruthenium tetroxide by transmission electron microscopy. Take a photo.
- the rubber component in the rubber-modified styrene resin and the dispersed phase of the propylene resin and the ethylene rubber can be distinguished by the density (degree) of the dyeing.
- FIG. 1 is a transmission electron micrograph of an ultrathin section of 80 nm in thickness obtained by staining a pellet of Example 1 described later with osmium tetraoxide and then with ruthenium tetroxide.
- the styrene resin which is the continuous phase of the component (A) of the thermoplastic resin composition of the present invention, the styrene resin has a shading distribution separately from the crosslinked rubber particles (salami type) derived from the rubber-modified styrene resin. A flat fine dispersed phase is observed.
- the thinner and darker the dispersed phase is the propylene-based resin, and the thicker is the ethylene-based rubber, and the dispersed phase forms a mixed phase of the propylene-based resin and the ethylene-based rubber in the same particle.
- the reason that the dispersed phase is flat is that the propylene resin and the ethylene rubber used in the present invention are not crosslinked.
- the portion where the interface between the dispersed phase and the continuous phase appears dark is the hydrogenated styrene-conjugated gen block copolymer.
- the total amount of styrene monomer and ethylbenzene in the thermoplastic resin composition of the present invention is preferably 500 ppm or less!
- the total amount can be determined by selecting a material that has low residual amounts of styrene monomer and ethylbenzene in the rubber-modified styrenic resin as component (A), and Z or devolatilizing with a vented extruder during kneading. Can be controlled.
- the mixing ratio of the components (A), (B) and (C) is not particularly limited, but the rigidity and the resistance of the thermoplastic resin composition are improved. Balance of chemical properties, heat resistance and impact strength From the viewpoint of (A), it is preferable that (A) 50 to 90 parts by weight of styrene resin, (B) 5 to 20 parts by weight of propylene resin, and (C) 8 to 30 parts by weight of ethylene rubber.
- thermoplastic resin composition of the present invention may optionally contain various additives such as phenol-based or phosphorus-based antioxidants, plasticizers such as liquid paraffin, stearic acid, zinc stearate, and stearic acid.
- plasticizers such as liquid paraffin, stearic acid, zinc stearate, and stearic acid.
- a release agent such as calcium phosphate, an external lubricant such as ethylenebisstearylamide, various pigments, a flame retardant, and silicone oil can be appropriately compounded.
- the method for producing the thermoplastic resin composition of the present invention is not particularly limited, and any known method can be employed.
- it is manufactured using a known kneading machine such as a single screw extruder, a twin screw extruder, and a Banbury mixer.
- thermoplastic resin composition of the present invention is molded by a known molding method such as injection molding, extrusion molding, thermoforming, hollow molding, professional molding, or foam molding.
- Homopolypropylene resin Product number "EA9” (manufactured by Nippon Polypropylene Corporation)
- Block polypropylene resin Product number "EC9” (manufactured by Nippon Polypropylene Corporation)
- Polyethylene Product number "KS240T” (manufactured by Nippon Polyethylene Corporation, density: 0.880 g / cm)
- Ethylene ⁇ -olefin copolymer Product number “EG8100” (Dupont Welast (Mer Japan Co., Ltd., density 0.870 g / cm 3 )
- Ethylene a- olefin copolymer Product number “EBM3011P” (manufactured by JSR, density 0.
- Ethylene a-olefin copolymer Product number “Moretech 0138” (manufactured by Idemitsu Petrochemical Co., Ltd., density: 0.917 g / cm 3 )
- SEBS Product number "H1043” (manufactured by Asahi Kasei Chemicals Corporation, styrene content 65% by weight, hydrogenation rate> 90%)
- SEBS Product number "H1041” (Asahi Kasei Chemicals Corporation, styrene content 30% by weight, hydrogenation rate> 90%)
- SEPS Product number "S2104" (Kuraray Co., Ltd., styrene content 65% by weight, hydrogenation rate> 90%)
- Omm plates were dyed with osmium tetroxide and then with ruthenium tetroxide.
- transmission electron micrographs the major axis and minor axis were measured for 200 or more dispersed phases excluding rubber particles derived from rubber-modified styrenic resin, respectively, and averaged to determine L, D, and LZD (see below). In Tables 1 and 2 above, only L and LZD are described).
- strips (size of about 2mm x 12.5mm x 62mm) were made from the thermoplastic resin composition pellets by press molding, and cooled under nitrogen using a Rheometrics RMS-800. Measured at a speed of 3 ° CZmin and a frequency of lOradZs.
- test pieces thickness 2. Omm Plate
- Rosand IFW Rocket diameter 10mm
- missile weight 3.2kg drop height lm
- test temperature 30 ° C, 23 ° C or 60 ° C the absorbed energy of the above test piece ⁇ was measured.
- the critical strain value was determined according to the method (Bendin Form Method) described in Materials Reseach & Standards Vol. 9, No. 12, p32.
- test pieces having a thickness of l to 2 mm, a width of 35 mm, and a length of 230 mm were prepared from the thermoplastic resin composition pellets by a compression molding method (press molding).
- the test piece was fixed on a bending foam in which the strain was continuously changed from 0 to 0.85%, kerosene was applied, and left at 23 ° C and a relative humidity of 50% RH for 17 hours. Thereafter, the test piece was taken out, the distance to the base force crack initiation point (position) was measured, and the critical strain value (%) was obtained. The higher the critical strain value, the better the chemical resistance.
- thermoplastic resin composition Pellets of the thermoplastic resin composition were pulverized and subjected to Soxhlet extraction with methyl ethyl ketone for 8 hours. After reprecipitation with methanol, filtration to remove the polymer component, and concentration of the filtrate, styrene monomer and ethylbenzene were quantified by gas chromatography (weight ppm of each component in the molded article).
- component (A) 60 parts by weight of HIPS (product number “HT478” manufactured by PS Japan Co., Ltd.) and 15 parts by weight of GPPS (product number “685” manufactured by PS Japan Co., Ltd.) are used.
- a fat product number "EC9” manufactured by Nippon Polypropylene Co., Ltd.
- an ethylene ⁇ -olefin copolymer product number "EG8100” manufactured by Dupont Welastomer Japan Co., Ltd.
- SEBS Adsahi Kasei Chemicals Corporation, product number "H1043
- the blend was vacuum-vented using a twin-screw extruder (manufactured by Toshiba Machine Co., Ltd., TEM35) at a cylinder temperature of 220 ° C and a screw rotation speed of 200 rpm. Then, the mixture was kneaded to produce pellets.
- a twin-screw extruder manufactured by Toshiba Machine Co., Ltd., TEM35
- pellets were produced in the same manner as in Example 1 except that the types and mixing ratios of the components (A) to (D) were changed, and various evaluations were performed.
- Table 1 shows the measurement results of various physical properties.
- a pellet was produced by kneading the same composition as in Example 1 at an extrusion temperature of 250 ° C. without using a vacuum vent.
- Table 1 shows the measurement results of various physical properties.
- Example 2 Using the pellets produced in Example 1, various test pieces were prepared by compression molding and evaluated. Table 1 shows the measurement results of various physical properties.
- pellets were produced in the same manner as in Example 1 except that the types and mixing ratios of the components (A) to (D) were changed, and various physical properties were evaluated.
- Comparative Examples 1 to 10 have initial properties (low-temperature impact strength and high-temperature stiffness) before recycling! Are poor in chemical resistance. Therefore, the recycling physical properties (absorbed energy to pellets after 8 times extrusion) are not measured. I got it.
- Table 2 shows the measurement results of various physical properties.
- a resin composition was prepared in the same manner as in Example except that styrene-conjugated genblock elastomer (SB block elastomer) (manufactured by Asahi Kasei Corporation, product number "TR125”) was used. Obtained. Table 3 shows the measurement results of various physical properties.
- thermoplastic resin compositions of the present invention described in Examples 1 to 12 From a low temperature of 30 ° C to a high temperature of 60 ° C, it has excellent impact resistance and rigidity over a wide temperature range, and has excellent chemical resistance with little reduction in physical properties during repeated extrusion.
- thermoplastic resin composition does not contain (C) ethylene rubber, the low-temperature impact strength is inferior and brittle fracture occurs (Comparative Example 1).
- thermoplastic resin composition does not contain the propylene resin (B)
- the chemical resistance is poor (Comparative Example 2).
- the thermoplastic resin composition of Comparative Example 3 does not satisfy Formulas 1 and 2, and has excellent chemical resistance, but is inferior in high-temperature rigidity and impact strength.
- styrene resin which is not rubber-modified is used for the thermoplastic resin composition (Comparative Example 4)
- the low-temperature impact strength is inferior and the material is brittle.
- Comparative Examples 5 to 10 when the thermoplastic resin composition does not satisfy the formula (1), the low-temperature impact strength is poor and brittle fracture occurs.
- FIG. 2 is an absorption energy curve of a drop weight impact test at 30 ° C. on the test pieces of the thermoplastic resin compositions of Example 1 and Comparative Example 7, with the horizontal axis representing displacement (unit: mm) and the vertical axis representing Stress (unit: kN).
- Example 1 is a so-called ductile fracture with a high maximum stress and deformation until the striker penetrates.
- the condition (1) is satisfied! / Are sharply depressed, showing typical brittle fracture behavior.
- FIG. 3 shows the absorption in the falling weight impact test at ⁇ 30 ° C. with respect to the 1 ⁇ / 1 ⁇ ratio for each of the test pieces of Examples 1 to 9 and 11 and Comparative Examples 2 to. It is a plot of energy.
- each test piece of the thermoplastic resin composition in the examples of the present invention shows high absorption energy even under a severe condition of 30 ° C.
- Comparative Example 8 corresponds to Example 6 of Patent Document 2 described above
- Comparative Example 9 corresponds to Example 5 of Patent Document 3 described above
- Comparative Example 10 corresponds to Comparative Example 4 of Patent Document 3 described above.
- FIG. 4 is a plot of critical strain versus WBZWC ratio for each of the test pieces of Examples 1 to 12 and Comparative Examples 2 and 5 to 10. From this relationship, when there is no (B) propylene-based resin, the critical strain value is low and the critical strain value is dramatically increased only by adding a small amount of the component (B), and the chemical resistance is improved. I understood. In Fig. 4, the critical strain as described above When the value was “> 0.7%”, a point at 0.7 was plotted.
- Example 6 Example 7 Example 8 Flat EI Example 10 Example 11 Example 12
- thermoplastic resin composition of the present invention has excellent impact strength over a wide temperature range, does not break brittle, and has excellent chemical resistance. Therefore, it can be suitably used for applications where the temperature changes drastically or under severe use conditions, for example, industrial members such as houses and automobiles.
- FIG. 1 is a transmission electron micrograph showing the particle structure of the thermoplastic resin composition of Example 1.
- FIG. 2 is a view showing an absorbed energy curve of a drop weight impact test at 30 ° C. on test pieces of the thermoplastic resin compositions of Example 1 and Comparative Example 7.
- FIG. 3 is a graph of the absorbed energy with respect to the WBZWC ratio for the test pieces of the thermoplastic resin composition of LO in Examples 1 to 9, 11 and Comparative Examples 2, 5 to. Comparative Example 8 is equivalent to Example 6 of Patent Document 2, Comparative Example 9 is equivalent to Example 5 of Patent Document 3, and Comparative Example 10 is equivalent to Comparative Example 4 of Patent Document 3.
- FIG. 4 is a graph of the critical strain value versus the WBZWC ratio for test pieces of the thermoplastic resin compositions of Examples 1 to 12 and Comparative Examples 2, 5 to: LO.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US11/578,421 US20070219317A1 (en) | 2004-04-15 | 2005-04-14 | Thermoplastic Styrene Resin Composition |
JP2006512374A JP4836782B2 (ja) | 2004-04-15 | 2005-04-14 | スチレン系熱可塑性樹脂組成物 |
DE112005000818T DE112005000818B4 (de) | 2004-04-15 | 2005-04-14 | Thermoplastische Styrol-Harz-Zusammensetzung und deren Verwendung |
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JP2004120405 | 2004-04-15 | ||
JP2004-120405 | 2004-04-15 |
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WO2005100470A1 true WO2005100470A1 (ja) | 2005-10-27 |
WO2005100470A9 WO2005100470A9 (ja) | 2006-09-28 |
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PCT/JP2005/007235 WO2005100470A1 (ja) | 2004-04-15 | 2005-04-14 | スチレン系熱可塑性樹脂組成物 |
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US (1) | US20070219317A1 (ja) |
JP (1) | JP4836782B2 (ja) |
DE (1) | DE112005000818B4 (ja) |
WO (1) | WO2005100470A1 (ja) |
Cited By (1)
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CN104059297A (zh) * | 2014-02-26 | 2014-09-24 | 上海金发科技发展有限公司 | 一种高刚性高耐热抗冲击发白阻燃聚丙烯-聚苯乙烯复合材料及其制备方法 |
Families Citing this family (3)
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US7851559B2 (en) * | 2007-11-13 | 2010-12-14 | Teknor Apex Company | Soft zero halogen flame retardant thermoplastic elastomers |
BRPI0923799A2 (pt) * | 2008-12-30 | 2015-07-21 | Basf Se | Partícula de polímero termoplástico, expansível, e, processo para a produção de partículas de polímero termoplástico, expansível. |
US10435549B2 (en) * | 2014-08-28 | 2019-10-08 | Equistar Chemicals, Lp | Carbon fiber-filled thermoplastic olefinic compounds and related automotive components |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05295193A (ja) * | 1992-04-23 | 1993-11-09 | Daicel Chem Ind Ltd | 熱可塑性樹脂組成物 |
JPH07292173A (ja) * | 1994-04-21 | 1995-11-07 | Mitsubishi Chem Corp | 樹脂組成物 |
JPH07292182A (ja) * | 1994-04-26 | 1995-11-07 | Mitsubishi Chem Corp | 樹脂組成物 |
JP2000186177A (ja) * | 1998-12-22 | 2000-07-04 | Asahi Chem Ind Co Ltd | 熱可塑性樹脂組成物 |
JP2000212356A (ja) * | 1999-01-28 | 2000-08-02 | Idemitsu Petrochem Co Ltd | 芳香族ビニル重合体樹脂組成物、樹脂発泡シ―ト、樹脂発泡シ―トの製造方法及び容器 |
Family Cites Families (1)
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JP4849768B2 (ja) * | 2003-08-13 | 2012-01-11 | テクノポリマー株式会社 | 熱可塑性樹脂組成物及び成形品 |
-
2005
- 2005-04-14 DE DE112005000818T patent/DE112005000818B4/de active Active
- 2005-04-14 JP JP2006512374A patent/JP4836782B2/ja active Active
- 2005-04-14 WO PCT/JP2005/007235 patent/WO2005100470A1/ja active Application Filing
- 2005-04-14 US US11/578,421 patent/US20070219317A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05295193A (ja) * | 1992-04-23 | 1993-11-09 | Daicel Chem Ind Ltd | 熱可塑性樹脂組成物 |
JPH07292173A (ja) * | 1994-04-21 | 1995-11-07 | Mitsubishi Chem Corp | 樹脂組成物 |
JPH07292182A (ja) * | 1994-04-26 | 1995-11-07 | Mitsubishi Chem Corp | 樹脂組成物 |
JP2000186177A (ja) * | 1998-12-22 | 2000-07-04 | Asahi Chem Ind Co Ltd | 熱可塑性樹脂組成物 |
JP2000212356A (ja) * | 1999-01-28 | 2000-08-02 | Idemitsu Petrochem Co Ltd | 芳香族ビニル重合体樹脂組成物、樹脂発泡シ―ト、樹脂発泡シ―トの製造方法及び容器 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104059297A (zh) * | 2014-02-26 | 2014-09-24 | 上海金发科技发展有限公司 | 一种高刚性高耐热抗冲击发白阻燃聚丙烯-聚苯乙烯复合材料及其制备方法 |
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WO2005100470A9 (ja) | 2006-09-28 |
DE112005000818B4 (de) | 2009-10-15 |
JPWO2005100470A1 (ja) | 2008-03-06 |
DE112005000818T5 (de) | 2007-04-05 |
US20070219317A1 (en) | 2007-09-20 |
JP4836782B2 (ja) | 2011-12-14 |
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