WO2015146718A1 - ポリアリーレンサルファイド系樹脂組成物及びインサート成形体 - Google Patents
ポリアリーレンサルファイド系樹脂組成物及びインサート成形体 Download PDFInfo
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- WO2015146718A1 WO2015146718A1 PCT/JP2015/057901 JP2015057901W WO2015146718A1 WO 2015146718 A1 WO2015146718 A1 WO 2015146718A1 JP 2015057901 W JP2015057901 W JP 2015057901W WO 2015146718 A1 WO2015146718 A1 WO 2015146718A1
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- resin composition
- calcium carbonate
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- polyarylene sulfide
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- C—CHEMISTRY; METALLURGY
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
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- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
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- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/286—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polysulphones; polysulfides
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- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
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- C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
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- C08L81/02—Polythioethers; Polythioether-ethers
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- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
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- B29C48/402—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders the screws having intermeshing parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29K2081/00—Use of polymers having sulfur, with or without nitrogen, oxygen or carbon only, in the main chain, as moulding material
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Definitions
- the present invention relates to a polyarylene sulfide-based resin composition and an insert-molded product obtained by integrally molding with an insert member by insert molding using the polyarylene sulfide-based resin composition.
- PAS resin Polyarylene sulfide (hereinafter referred to as “PAS”) resin, represented by polyphenylene sulfide (hereinafter referred to as “PPS”) resin, has high heat resistance, mechanical properties, chemical resistance, dimensional stability and flame retardancy. Have. For this reason, PAS resin is widely used for electrical / electronic equipment component materials, automotive equipment component materials, chemical equipment component materials, and the like, and is particularly used for applications with a high use environment temperature.
- the insert molding method is a molding method in which the characteristics of a resin and the characteristics of a material such as a metal or an inorganic solid (hereinafter sometimes referred to as “metal or the like”) are used to embed the metal or the like in the resin.
- Resin and metal are extremely different in expansion and contraction rate (so-called linear expansion coefficient) due to temperature change. For this reason, if the resin part of the molded product is thin, when the metal or the like has sharp corners, it often breaks immediately after molding or cracks due to temperature changes during use.
- the PAS resin has high heat resistance, mechanical properties, chemical resistance, dimensional stability, and flame retardancy, but is poor in toughness and fragile. There is a drawback that the reliability that can withstand the high and low temperature change during the period, that is, the high and low temperature impact characteristics are low.
- PAS resin has the property of being excellent in compatibility with, for example, an inorganic filler. Therefore, in general, PAS resin is often used as a composite material to which an inorganic filler is added, and it is considered that mechanical strength such as toughness is improved by adding an inorganic filler.
- the present invention has been made to solve the above-mentioned problems, and its purpose is to provide a PAS resin composition that has fluidity suitable for insert molding and can impart superior high and low temperature impact characteristics to the molded product. And providing an insert-molded article using the resin composition.
- a PAS resin composition comprising a PAS resin containing an olefin copolymer containing an ⁇ -olefin, a glycidyl ester of an ⁇ , ⁇ -unsaturated acid, and an acrylate ester.
- a PAS resin composition comprising a PAS resin containing an olefin copolymer containing an ⁇ -olefin, a glycidyl ester of an ⁇ , ⁇ -unsaturated acid, and an acrylate ester.
- the copolymer contains an ⁇ -olefin, a glycidyl ester of an ⁇ , ⁇ -unsaturated acid, and an acrylic ester as a copolymer component, and is a copolymer component derived from the glycidyl ester in the resin composition.
- the total content of the glass fiber and the calcium carbonate in the product is 45% by mass or more and 55% by mass or less.
- the PAS resin composition according to the present invention has fluidity suitable for insert molding, and can impart excellent high and low temperature impact characteristics to the obtained insert molded product.
- the polyarylene sulfide resin composition (PAS resin composition) of the present invention (hereinafter also simply referred to as “resin composition”) comprises a polyarylene sulfide resin having a carboxyl end group, an olefin copolymer, and an inorganic filler. Glass fiber and calcium carbonate are contained as an agent. First, these essential components will be described below.
- the polyarylene sulfide resin used in the present invention is mainly composed of — (Ar—S) — (“Ar” represents an arylene group) as a repeating unit.
- a PAS resin having a generally known molecular structure can be used.
- the arylene group is not particularly limited, and examples thereof include p-phenylene group, m-phenylene group, o-phenylene group, substituted phenylene group, p, p′-diphenylene sulfone group, p, p′-biphenylene group, p , P′-diphenylene ether group, p, p′-diphenylenecarbonyl group, naphthalene group and the like.
- arylene sulfide groups composed of such arylene groups in addition to a homopolymer using the same repeating unit, a polymer containing a repetition of different arylene sulfide groups is preferable depending on the application.
- the homopolymer preferably has a p-phenylene sulfide group as a repeating unit as an arylene group.
- a homopolymer having a p-phenylene sulfide group as a repeating unit has extremely high heat resistance, and exhibits high strength, high rigidity, and high dimensional stability in a wide temperature range. By using such a homopolymer, a molded product having very excellent physical properties can be obtained.
- a combination of two or more types of arylene sulfide groups that are different from the above-mentioned arylene sulfide groups containing an arylene group can be used.
- a combination containing a p-phenylene sulfide group and an m-phenylene sulfide group is preferable from the viewpoint of obtaining a molded product having high physical properties such as heat resistance, moldability and mechanical properties.
- a polymer containing a p-phenylene sulfide group in a proportion of 70 mol% or more is more preferable, and a polymer containing a proportion of 80 mol% or more is more preferable.
- the PAS resin having a phenylene sulfide group is a PPS resin.
- the PAS resin can be produced by a conventionally known polymerization method.
- a PAS resin produced by a general polymerization method is usually washed several times with water or acetone in order to remove by-product impurities and the like, and then washed with acetic acid, ammonium chloride or the like.
- the end of the PAS resin contains a carboxyl end group in a predetermined amount.
- the weight average molecular weight (Mw) of the PAS resin used in the present invention is 15000 or more and 40000 or less.
- the PAS resin composition has high fluidity in a molten state when filling the mold. Thereby, the molten resin can easily go around the insert member in the mold.
- the weight average molecular weight of the PAS resin is 15000 or more, excellent mechanical strength and moldability are obtained.
- the more preferable weight average molecular weight range of the PAS resin is 20000 or more and 38000 or less, and by being in such a range, the resin composition having a better balance between mechanical properties and fluidity, Become.
- the value obtained by measuring with the method as described in an Example is employ
- the olefin copolymer contains ⁇ -olefin, ⁇ , ⁇ -unsaturated glycidyl ester, and acrylic ester as copolymerization components.
- the essential copolymer component will be described.
- the ⁇ -olefin is not particularly limited, and conventionally known ⁇ -olefins can be used.
- usable ⁇ -olefins include ethylene, propylene, butylene and the like.
- ethylene is particularly preferable.
- Two or more of these ⁇ -olefins can be used in combination.
- the resin composition according to the present invention by containing ⁇ -olefin as a copolymerization component in this way, flexibility is imparted to the molded product.
- the softening of the molded product due to the provision of flexibility contributes to the improvement of the high and low temperature impact characteristics.
- the content of the copolymer component derived from the ⁇ -olefin in the resin composition is not particularly limited, but is preferably 2% by mass or more.
- the copolymer component derived from ⁇ -olefin is contained in an amount of 2% by mass or more, sufficient flexibility can be imparted to the molded article, and the high and low temperature impact characteristics are further improved.
- the glycidyl ester of ⁇ , ⁇ -unsaturated acid is a component represented by the following general formula (1).
- R 1 represents hydrogen or a lower alkyl group.
- Examples of the compound represented by the general formula (1) include glycidyl acrylate, glycidyl methacrylate, glycidyl ethacrylate, and the like. Among these, in the resin composition according to the present invention, it is preferable to use glycidyl methacrylate.
- the effect of improving the high-low temperature impact property of the molded product can be obtained.
- the content of the copolymer component derived from the glycidyl ester of ⁇ , ⁇ -unsaturated acid in the resin composition is 0.2% by mass or more and 0.6% by mass or less. is there.
- the content of the copolymer component derived from the glycidyl ester of ⁇ , ⁇ -unsaturated acid is less than 0.2% by mass, sufficient high and low temperature impact characteristics cannot be imparted to the molded product.
- the content of the copolymer component derived from the glycidyl ester of ⁇ , ⁇ -unsaturated acid exceeds 0.6% by mass, the decomposition gas increases at the time of molding, and the mold deposit which is a deposit on the mold Or gas burn is likely to occur, and the high and low temperature impact characteristics cannot be effectively improved. Furthermore, the fluidity of the resin composition is lowered, making it unsuitable for insert molding. More preferably, the content of the copolymer component derived from the glycidyl ester of ⁇ , ⁇ -unsaturated acid in the resin composition is in the range of 0.3 mass% to 0.6 mass%.
- a glycidyl group contained in a copolymer component derived from a glycidyl ester reacts with a carboxyl terminal group of the PAS resin. It is presumed that the high and low temperature impact characteristics are improved by increasing the interaction with the polymer.
- the content of the copolymer component derived from the glycidyl ester is too large, the glycidyl groups of the olefin copolymer react with each other. The fluidity is reduced, making it unsuitable for insert molding.
- the acrylic ester is not particularly limited, and a conventionally known acrylic ester can be used.
- Usable acrylic esters include, for example, methyl acrylate, ethyl acrylate, acrylate-n-propyl, isopropyl acrylate, acrylate-n-butyl, acrylate-n-hexyl, and acrylate-n-octyl.
- Methacrylic acid and methacrylic acid esters for example, methyl methacrylate, ethyl methacrylate, methacrylic acid-n-propyl, isopropyl methacrylate, methacrylic acid-n-butyl, isobutyl methacrylate, methacrylic acid-n-amyl, methacrylic acid
- Acid-n-octyl etc.
- acrylic esters it is particularly preferable to use methyl acrylate.
- Acrylic acid ester is a component that contributes to the improvement of high and low temperature impact properties together with a copolymer component derived from ⁇ -olefin and a copolymer component derived from glycidyl ester.
- the content of the copolymer component derived from the acrylate ester contained in the olefin copolymer is not particularly limited, but is preferably 10% by mass or more and 40% by mass or less.
- the content of the copolymer component derived from the acrylate ester is 10% by mass or more, excellent high and low temperature impact characteristics are imparted.
- the olefin copolymer used in the present invention can be produced by polymerization by a conventionally known method.
- the content of the olefin copolymer in the resin composition is not particularly limited, but is preferably 1% by mass or more and 8% by mass or less. In the present invention, it is important to adjust the content of the copolymer component derived from the above-described glycidyl ester to a specific range rather than the content of the olefin copolymer.
- the resin composition according to the present invention contains glass fibers having a predetermined range of fiber diameters.
- glass fiber which is such a fibrous inorganic filler it is possible to improve performance such as mechanical strength, heat resistance, dimensional stability (deformation resistance, warpage), electrical properties, etc.
- glass fibers having a fiber diameter in a predetermined range it is possible to make the obtained molded article have excellent high and low temperature impact characteristics.
- the resin composition according to the present invention contains glass fibers having a fiber diameter of 9 ⁇ m or more and 13 ⁇ m or less.
- the fiber diameter of glass fiber means the long diameter of the fiber cross section of glass fiber.
- the fiber diameter of the glass fiber is less than 9 ⁇ m, sufficient high and low temperature impact characteristics cannot be imparted to the molded product. On the other hand, even when the fiber diameter of the glass fiber exceeds 13 ⁇ m, the high and low temperature impact characteristics are deteriorated. More preferably, the fiber diameter of the glass fiber is in the range of 9 ⁇ m to 11 ⁇ m.
- the glass fiber is not particularly limited as long as it has a fiber diameter in the predetermined range described above, and glass fibers such as a perfect circle and an ellipse can be used. Moreover, it does not specifically limit about the kind of glass fiber, For example, although A glass, C glass, E glass, etc. can be used, it is preferable to use E glass (non-alkali glass) among them. Further, the glass fiber may be subjected to surface treatment or not. Examples of the surface treatment for glass fiber include treatment with a coating agent such as epoxy, acrylic, urethane, or a sizing agent, and treatment with a silane coupling agent such as aminosilane or epoxysilane.
- a coating agent such as epoxy, acrylic, urethane, or a sizing agent
- silane coupling agent such as aminosilane or epoxysilane.
- chopped glass fibers obtained by cutting a plurality of these fibers into a predetermined length.
- the cut length of the chopped glass fiber is not particularly limited, and can be, for example, about 1 to 10 mm.
- the resin composition according to the present invention contains calcium carbonate having an average particle diameter in a predetermined range.
- calcium carbonate which is an inorganic filler of metal carbonate
- heat resistance, dimensional stability (deformation resistance, warpage), electrical properties as well as mechanical strength are included.
- Performance can be further improved, and by using calcium carbonate having an average particle diameter in a predetermined range, the high and low temperature impact characteristics of the obtained molded product can be made extremely excellent.
- the calcium carbonate In order to improve the high and low temperature impact characteristics of the molded product, it is important for the calcium carbonate to have an average particle size within a predetermined range as described above.
- the average particle diameter means a particle diameter (50% d) at which the cumulative weight distribution is 50%.
- the resin composition according to the present invention contains calcium carbonate having an average particle size of 10 ⁇ m or more and 50 ⁇ m or less.
- the average particle size of calcium carbonate is less than 10 ⁇ m, the area of the interface between the PAS resin and calcium carbonate, which is the starting point of fracture, becomes large, and sufficient high and low temperature impact characteristics cannot be imparted to the molded product.
- the average particle size of calcium carbonate exceeds 50 ⁇ m, the compatibility between the PAS resin and calcium carbonate is lowered, so that the mechanical strength and the like described above are lowered and the high and low temperature impact characteristics are also lowered. More preferably, the average particle diameter of calcium carbonate is in the range of 10 ⁇ m to 40 ⁇ m.
- the calcium carbonate is not particularly limited as long as it has an average particle diameter in the above-mentioned predetermined range, and for example, heavy calcium carbonate, precipitated calcium carbonate (light calcium carbonate, colloidal calcium carbonate), or the like can be used. Moreover, you may use the calcium carbonate (surface treatment calcium carbonate) which surface-treated these calcium carbonates, for example with the fatty acid, fatty acid ester, resin acid, a higher alcohol addition isocyanate compound, etc.
- Glass fiber and calcium carbonate content in the resin composition which concerns on this invention, content of the glass fiber mentioned above and calcium carbonate is controlled to a specific range.
- the glass fiber and calcium carbonate content in the resin composition is such that the total content of the glass fiber and calcium carbonate is in the range of 45 mass% to 55 mass%.
- the total content is less than 45% by mass, the effect of improving the performance such as mechanical strength is hardly exhibited, and the high and low temperature impact characteristics of the molded product are deteriorated.
- the total content exceeds 55% by mass, the molding operation becomes difficult, and physical properties such as mechanical strength of the molded product are lowered, and the high and low temperature impact characteristics are also lowered.
- the glass fiber and calcium carbonate content is preferably set such that (glass fiber content) / (calcium carbonate content) is 1 or more and 4.5 or less.
- the resin composition which concerns on this invention may contain other resin in the range which does not impair the effect of this invention.
- pigments such as nucleating agent, carbon black, inorganic calcined pigment, antioxidants, stabilizers, plasticizers, lubricants, mold release agents, flame retardants, etc. These additives may be added.
- the resin composition which provided the desired characteristic is also contained in the PAS type-resin composition used by this invention.
- the PAS resin composition according to the present invention can be prepared by a conventionally known method. Specifically, for example, after mixing the above-described components, a method of preparing a pellet by kneading and extruding with an extruder, once preparing a pellet having a different composition, mixing the pellet in a predetermined amount, and providing for molding, Any method such as a method of obtaining a molded product having a desired composition after molding or a method of directly charging one or more of each component into a molding machine can be suitably used.
- the resin composition according to the present invention is characterized in that it contains fluidity suitable for insert molding, although it contains an inorganic filler.
- the fluidity of the resin composition varies depending on the type and blending amount of the resin to be used, the type and proportion of the copolymer component when the resin is a copolymer, the type and blending amount of other additives, etc.
- preferable fluidity can be realized mainly by adjusting the weight average molecular weight of the PAS resin.
- the weight average molecular weight (Mw) of the PAS resin is set to 15000 or more and 40000 or less.
- the weight average molecular weight (Mw) of the PAS resin is adjusted even when an inorganic filler such as glass fiber or calcium carbonate is contained at a predetermined ratio as described above.
- an inorganic filler such as glass fiber or calcium carbonate
- a resin composition having a preferable fluidity with a melt viscosity at 310 ° C. and a shear rate of 1000 sec ⁇ 1 of 80 Pa ⁇ s to 240 Pa ⁇ s is obtained.
- the insert molded product according to the present invention is formed integrally with the insert member by insert molding using the above-described PAS resin composition. Except for using the PAS resin composition described above as a material, it is the same as a general insert-molded product.
- a general insert molded product refers to a compound molded product obtained by previously mounting a metal or the like on a molding die and filling the outside with the PAS resin composition described above.
- a molding method for filling a resin with a mold there are an injection molding method, an extrusion compression molding method, and the like, and an injection molding method is common.
- excellent fluidity like the resin composition according to the present invention is required.
- the insert member is not particularly limited, but it is used for the purpose of taking advantage of its characteristics and compensating for the defects of the resin, so that it does not change shape or melt when it comes into contact with the resin during molding is preferably used. Is done.
- metals such as aluminum, magnesium, copper, iron, brass, and alloys thereof, and those previously molded into rods, pins, screws, etc., using inorganic solids such as glass and ceramics.
- the present invention when a metal is used as the insert member, the effects of the present invention are remarkably exhibited.
- the shape of the insert member is not limited.
- PAS resin (A) PAS resin 1 (A-1): PPS resin (polymerization average molecular weight Mw: 25000), “Fortron KPS W202A” manufactured by Kureha Corporation
- the rotational speed of the stirrer was immediately increased to 400 rpm, and 340 g of water was injected.
- the temperature was raised to 260 ° C. over 1 hour, and the reaction was carried out at that temperature for 5 hours to carry out post polymerization.
- the reaction mixture is cooled to near room temperature, and the contents are sieved using a 100-mesh screen, and then the acetone is washed three times, washed three times with water, and 0.3%. Washing with acetic acid was performed, followed by washing with water four times to obtain a washed granular polymer.
- the granulated polymer was dried at 105 ° C. for 13 hours. This operation was repeated 5 times to obtain a necessary amount of polymer (PPS resin 2).
- the weight average molecular weight of the PAS resin was measured. Specifically, 1-chloronaphthalene was used as a solvent, heated and dissolved in an oil bath at 230 ° C./10 minutes, and purified by high-temperature filtration as necessary to prepare a 0.05 mass% concentration solution. A high-temperature gel permeation chromatographic method (measuring device: Senshu Scientific “SSC-7000”, UV detector (detection wavelength: 360 nm)) was performed, and the weight average molecular weight was calculated in terms of standard polystyrene. As a result of the calculation, as described above, the weight average molecular weight of the PAS resin 1 was Mw: 25000, and the weight average molecular weight of the PAS resin 2 was Mw: 20000.
- Olefin-based copolymer 1 (B-1): “Bond First 7M” manufactured by Sumitomo Chemical Co., Ltd. (glycidyl methacrylate (GMA) content: 6 mass%)
- Olefin-based copolymer 2 (B-2): “Bond First 7L” manufactured by Sumitomo Chemical Co., Ltd. (glycidyl methacrylate (GMA) content: 3 mass%)
- -Olefin copolymer 3 (B-3): "Evaflex EEA” manufactured by Nihon Unicar Co., Ltd.
- Olefin copolymer 4 (B-4): “Rotada AX8900” manufactured by Arkema Co., Ltd. (glycidyl methacrylate (GMA) content: 8 mass%)
- the olefin copolymers 1, 2, and 4 contain ethylene, glycidyl methacrylate (GMA), and methyl acrylate (MA) as copolymer components.
- the olefin copolymer 3 contains ethylene and ethyl acrylate as a copolymerization component.
- Table 1 shows the details of the content ratio (each component amount) of each copolymer component.
- Glass fiber (C) Glass fiber 1 (C-1): “Chopped strand ECS03T-747DE (fiber diameter: 6.5 ⁇ m) manufactured by Nippon Electric Glass Co., Ltd.”
- Calcium carbonate (D) Calcium carbonate 1 (D-1): “R heavy coal” manufactured by Maruo Calcium Co., Ltd., average particle size (50% d) 7 ⁇ m Calcium carbonate 2 (D-2): “MC-35” manufactured by Asahi Kou Sue Co., Ltd., average particle size (50% d) 15 ⁇ m Calcium carbonate 3 (D-3): “KS-500” manufactured by Calfine Co., Ltd., average particle size (50% d) 18 ⁇ m Calcium carbonate 4 (D-4): “FP-300” manufactured by Calfine Co., Ltd., average particle size (50% d) 27 ⁇ m Calcium carbonate 5 (D-5): “K-300” manufactured by Asahi Kouyu Co., Ltd., average particle size (50% d) 70 ⁇ m Calcium carbonate 6 (D-6): “A heavy coal” manufactured by Maruo Calcium Co., Ltd., average particle size (50% d) 150 ⁇ m Calcium carbonate 7 (D-7): “Whiteon P-30
- the PAS resin composition is prepared by uniformly mixing a PAS resin, an olefin copolymer, and, if necessary, other additives with a tumbler or a Henschel mixer, etc., using a twin screw extruder with a cylinder temperature of 320 ° C.
- the resin composition pellets of Examples and Comparative Examples were prepared by melt-kneading. Of the compositional components shown in Table 1 below, glass fibers and calcium carbonate were introduced into an extruder using a side feeder and melt-kneaded.
- melt viscosity of Resin Composition [Evaluation of Melt Viscosity of Resin Composition]
- MV melt viscosity
- a capillograph manufactured by Toyo Seiki Co., Ltd.
- Table 1 shows the measurement results of the melt viscosity.
- the resin temperature is 320 ° C.
- the mold temperature is 150 ° C.
- the injection time is 40 seconds
- the cooling time is 60 seconds
- the insert metal 8 mm ⁇ 23 mm ⁇ 40 mm
- Insert injection molding was carried out so that the thickness of each would be 1 mm, and insert molded products of Examples and Comparative Examples were manufactured.
- the insert molded product produced using the PAS resin composition according to the present invention has mechanical strength and extremely excellent high and low temperature impact characteristics. It was confirmed that In addition, the resin compositions used in Examples 1 to 9 had fluidity suitable for insert molding.
- Comparative Examples 1 to 5 calcium carbonates having average particle sizes of 7 ⁇ m, 150 ⁇ m, 70 ⁇ m, 5 ⁇ m, and 70 ⁇ m, respectively, are contained in the resin compositions.
- impact resistance at high and low temperatures is lower than that of an insert-molded product (Examples 1 to 9) made of a resin composition containing calcium carbonate having an average particle size in the range of 10 ⁇ m to 50 ⁇ m.
- Examples 1 to 9 made of a resin composition containing calcium carbonate having an average particle size in the range of 10 ⁇ m to 50 ⁇ m.
- Comparative Examples 8 to 10 a resin composition containing a copolymer component derived from glycidyl ester at a ratio of 0.18% by mass, 0% by mass, and 0.12% by mass, respectively, was used. Even in such a case, it was confirmed that the high and low temperature impact characteristics of the produced insert-molded product deteriorated.
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Abstract
Description
本発明のポリアリーレンサルファイド系樹脂組成物(PAS系樹脂組成物)(以下単に「樹脂組成物」ともいう)は、カルボキシル末端基を有するポリアリーレンサルファイド樹脂と、オレフィン系共重合体と、無機充填剤としてガラス繊維と、炭酸カルシウムとを含有する。先ず、これらの必須成分について以下説明する。
本発明に用いられるポリアリーレンサルファイド樹脂は、繰り返し単位として、-(Ar-S)-(なお、「Ar」はアリーレン基を示す)を主として構成されたものである。本発明では一般的に知られている分子構造のPAS樹脂を使用することができる。
オレフィン系共重合体は、共重合成分として、α-オレフィンと、α,β-不飽和酸のグリシジルエステルと、アクリル酸エステルとを含む。先ず、必須の共重合成分について説明する。
α-オレフィンとしては、特に限定されず従来公知のものを使用することができる。例えば、使用可能なα-オレフィンとしては、エチレン、プロピレン、ブチレン等が挙げられる。これらのα-オレフィンの中でも、特にエチレンが好ましい。これらα-オレフィンは2種以上を併用することもできる。
アクリル酸エステルとしては、特に限定されず従来公知のものを使用することができる。使用可能なアクリル酸エステルとしては、例えば、アクリル酸メチル、アクリル酸エチル、アクリル酸-n-プロピル、アクリル酸イソプロピル、アクリル酸-n-ブチル、アクリル酸-n-ヘキシル、アクリル酸-n-オクチル等)、メタクリル酸及びメタクリル酸エステル(例えば、メタクリル酸メチル、メタクリル酸エチル、メタクリル酸-n-プロピル、メタクリル酸イソプロピル、メタクリル酸-n-ブチル、メタクリル酸イソブチル、メタクリル酸-n-アミル、メタクリル酸-n-オクチル等が挙げられる。これらのアクリル酸エステルの中でも、特にアクリル酸メチルを使用することが好ましい。
なお、オレフィン系共重合体としては、本発明の効果を害さない範囲で、他の共重合成分を含有することができる。
本発明に用いるオレフィン系共重合体は、従来公知の方法で重合することにより製造することができる。
本発明に係る樹脂組成物において、その樹脂組成物中のオレフィン系共重合体の含有量としては、特に限定されないが、1質量%以上8質量%以下とすることが好ましい。なお、本発明においては、オレフィン系共重合体の含有量よりも、上述したグリシジルエステルに由来する共重合成分の含有量を特定の範囲に調整することが重要となる。
[ガラス繊維]
本発明に係る樹脂組成物においては、所定範囲の繊維径を有するガラス繊維を含有する。このような繊維状の無機充填剤であるガラス繊維を含有させることにより、機械的強度をはじめとして、耐熱性、寸法安定性(耐変形、そり)、電気的性質等の性能を向上させることができるとともに、所定の範囲の繊維径を有するガラス繊維を用いることで、得られる成形品の高低温衝撃特性を極めて優れたものにすることができる。
本発明に係る樹脂組成物においては、所定範囲の平均粒径を有する炭酸カルシウムを含有する。このように、上述したガラス繊維と共に、金属炭酸塩の無機充填剤である炭酸カルシウムを含有させることにより、機械的強度をはじめとして、耐熱性、寸法安定性(耐変形、そり)、電気的性質等の性能をより向上させることができるとともに、所定の範囲の平均粒径を有する炭酸カルシウムを用いることで、得られる成形品の高低温衝撃特性を極めて優れたものにすることができる。
また、本発明に係る樹脂組成物において、上述したガラス繊維及び炭酸カルシウムの含有量を特定の範囲に制御する。具体的には、樹脂組成物中のガラス繊維、炭酸カルシウムの含有量としては、そのガラス繊維及び炭酸カルシウムの合計含有量が45質量%以上55質量%以下の範囲となるようにする。その合計含有量が45質量%未満であると、機械的強度等の性能改善の効果が表れ難くなるとともに、成形品の高低温衝撃特性が低下してしまう。一方で、合計含有量が55質量%を超えると、成形作業が困難になるほか、成形品の機械的強度等の物性が低下するとともに高低温衝撃特性も低下してしまう。また、ガラス繊維、炭酸カルシウムの含有量としては、好ましくは、(ガラス繊維の含有量)/(炭酸カルシウムの含有量)が1以上4.5以下となるようにする。
なお、本発明に係る樹脂組成物は、本発明の効果を害さない範囲で他の樹脂を含んでもよい。また、成形品に所望とする特性を付与するために、例えば、核剤、カーボンブラック、無機焼成顔料等の顔料、酸化防止剤、安定剤、可塑剤、滑剤、離型剤、及び難燃剤等の添加剤を添加してもよい。このように所望の特性を付与した樹脂組成物も、本発明で用いるPAS系樹脂組成物に含まれる。
本発明に係るPAS系樹脂組成物は、従来公知の方法により調製することができる。具体的には、例えば、上述した各成分を混合した後、押出機により練り込み押出してペレットを調製する方法、一旦組成の異なるペレットを調製し、そのペレットを所定量混合して成形に供し、成形後に目的組成の成形品を得る方法、成形機に各成分の1又は2以上を直接仕込む方法等、何れの方法であっても好適に用いることができる。
本発明に係るインサート成形品は、上述したPAS系樹脂組成物を用い、インサート成形によりインサート部材と一体的に成形してなる。上述したPAS系樹脂組成物を材料として用いることを除いては、一般的なインサート成形品と同様である。
[PAS樹脂(A)]
・PAS樹脂1(A-1):PPS樹脂(重合平均分子量Mw:25000)、(株)クレハ製「フォートロンKPS W202A」
・PAS樹脂2(A-2):PPS樹脂(重合平均分子量Mw:20000)、(株)クレハ製「フォートロンKPS」
上述のPAS樹脂2の合成方法を以下に示す。すなわち、先ず、20LのオートクレーブにNMP(N-メチル-2-ピロリドン)5700gを仕込み、窒素ガスで置換後、約1時間かけて撹拌機の回転数250rpmで撹拌しながら、100℃まで昇温した。100℃に到達後、濃度74.7質量%のNaOH水溶液1170g、硫黄源水溶液1990g(NaSH=21.8モル及びNa2S=0.50モルを含む)、及びNMP1000gを加え、約2時間かけて徐々に200℃まで昇温し、水945g、NMP1590g、及び0.31モルの硫化水素を系外に排出した。
また、PAS樹脂の重量平均分子量の測定を行った。具体的には、溶媒として1-クロロナフタレンを使用し、オイルバスで230℃/10分間加熱溶解させて、必要に応じて高温濾過により精製し、0.05質量%濃度溶液を調製した。高温ゲル浸透クロマトグラフ法(測定装置;センシュー科学「SSC-7000」、UV検出器(検出波長:360nm))を行い、標準ポリスチレン換算で重量平均分子量を算出した。その算出の結果、上述したように、PAS樹脂1の重量平均分子量がMw:25000であり、PAS樹脂2の重量平均分子量がMw:20000であった。
・オレフィン系共重合体1(B-1):住友化学(株)製「ボンドファースト7M」(グリシジルメタクリレート(GMA)含有量:6質量%)
・オレフィン系共重合体2(B-2):住友化学(株)製「ボンドファースト7L」(グリシジルメタクリレート(GMA)含有量:3質量%)
・オレフィン系共重合体3(B-3):日本ユニカー(株)製「エバフレックスEEA」
・オレフィン系共重合体4(B-4):アルケマ(株)製「ロタダーAX8900」(グリシジルメタクリレート(GMA)含有量:8質量%)
・ガラス繊維1(C-1):日本電気硝子(株)製「チョップドストランド ECS03T-747DE(繊維径:6.5μm)
・ガラス繊維2(C-2):日本電気硝子(株)製「チョップドストランド ECS03T-747G(繊維径:9μm)
・ガラス繊維3(C-3):日本電気硝子(株)製「チョップドストランド ECS03T-747H」(繊維径:10.5μm)
・ガラス繊維4(C-4):日本電気硝子(株)製「チョップドストランド ECS03T-747(繊維径:13μm)
・ガラス繊維5(C-5):日本電気硝子(株)製「チョップドストランド ECS03T-747N(繊維径:17μm)
・炭酸カルシウム1(D-1):丸尾カルシウム(株)製「R重炭」、平均粒子径(50%d)7μm
・炭酸カルシウム2(D-2):旭鉱末(株)製「MC-35」、平均粒子径(50%d)15μm
・炭酸カルシウム3(D-3):(株)カルファイン製「KS-500」、平均粒子径(50%d)18μm
・炭酸カルシウム4(D-4):(株)カルファイン製「FP-300」、平均粒子径(50%d)27μm
・炭酸カルシウム5(D-5):旭鉱末(株)製「K-300」、平均粒子径(50%d)70μm
・炭酸カルシウム6(D-6):丸尾カルシウム(株)製「A重炭」、平均粒子径(50%d)150μm
・炭酸カルシウム7(D-7):東洋ファインケミカル(株)製「ホワイトンP-30」、平均粒子径(50%d)5μm
PAS系樹脂組成物は、PAS樹脂、オレフィン系共重合体、さらに必要に応じてその他の添加剤を、タンブラーもしくはヘンシェルミキサー等で均一に混合し、これをシリンダー温度320℃の二軸押出機で溶融混練させ、実施例及び比較例の樹脂組成物ペレットを作製した。なお、下記表1に示す組成成分のうち、ガラス繊維、炭酸カルシウムについては、サイドフィーダーを用いて押出機に導入して溶融混練させた。
ここで、実施例及び比較例の樹脂組成物の溶融粘度を測定した。具体的には、キャピログラフ(東洋精機(株)製)を用い、キャピラリーとして1mmφ×20mmL/フラットダイを使用して、バレル温度310℃、せん断速度1000sec-1における樹脂組成物の溶融粘度(MV)を測定した。下記表1に、溶融粘度の測定結果を示す。
作製した実施例及び比較例の樹脂組成物ペレットを用い、樹脂温度320℃、金型温度150℃、射出時間40秒、冷却時間60秒で、インサート金属(8mm×23mm×40mm)に、樹脂部の肉厚が1mmとなるようにインサート射出成形し、実施例及び比較例のインサート成形品を製造した。
実施例及び比較例の樹脂組成物を用いて、射出成形により、シリンダー温度320℃、金型温度150℃で、ISO3167に準じた試験片(幅10mm、厚み4mmt)を作製し、ISO178に準じて曲げひずみ(Fγ)を測定した。下記表1に、曲げひずみの測定結果を示す。
実施例及び比較例のインサート成形品について、冷熱衝撃試験機(エスペック(株)製)を用いて140℃にて0.5時間加熱後、-40℃に降温して0.5時間冷却後、さらに140℃に昇温する過程を1サイクルとする高低温衝撃試験を行い、成形品にクラックが入るまでのサイクル数を測定し、以下の基準に基づいて高低温衝撃特性(HS)を評価した。下記表1に、高低温衝撃特性の評価結果を示す。
『◎』:サイクル数が200以上のもの
『○』:サイクル数が150以上200未満のもの
『△』:サイクル数が100以上で150未満のもの
『×』:サイクル数が100未満のもの
Claims (4)
- カルボキシル基末端を有するポリアリーレンサルファイド樹脂と、オレフィン系共重合体と、ガラス繊維と、炭酸カルシウムとを含み、
前記ポリアリーレンサルファイド樹脂の重量平均分子量が15000以上40000以下であり、
前記オレフィン系共重合体は、共重合成分としてα-オレフィンと、α,β-不飽和酸のグリシジルエステルと、アクリル酸エステルとを含み、
当該樹脂組成物中の前記グリシジルエステルに由来する共重合成分の含有量が0.2質量%以上0.6質量%以下であり、
前記ガラス繊維の繊維径が9μm以上13μm以下であり、
前記炭酸カルシウムの平均粒径が10μm以上50μm以下であり、
当該樹脂組成物中の前記ガラス繊維と前記炭酸カルシウムとの合計含有量が45質量%以上55質量%以下であるポリアリーレンサルファイド系樹脂組成物。 - 溶融粘度(310℃、ズリ速度1000sec-1)が80Pa・s以上240Pa・s以下である請求項1に記載のポリアリーレンサルファイド系樹脂組成物。
- 請求項1又は2に記載のポリアリーレンサルファイド系樹脂組成物を用い、
インサート成形によりインサート部材と一体的に成形してなるインサート成形体。 - 前記インサート部材が金属である請求項3に記載のインサート成形体。
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| US15/128,015 US20170096557A1 (en) | 2014-03-27 | 2015-03-17 | Polyarylene sulfide-derived resin composition and insert molded body |
| KR1020167019462A KR101704732B1 (ko) | 2014-03-27 | 2015-03-17 | 폴리아릴렌 설파이드계 수지 조성물 및 인서트 성형체 |
| CN201580011607.2A CN106062077B (zh) | 2014-03-27 | 2015-03-17 | 聚芳硫醚系树脂组合物以及嵌入成型体 |
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| CN106459571A (zh) * | 2014-04-28 | 2017-02-22 | 法雷奥照明公司 | 热塑性组合物 |
| JPWO2017115757A1 (ja) * | 2015-12-28 | 2018-08-02 | ウィンテックポリマー株式会社 | ポリブチレンテレフタレート樹脂組成物、及び金属複合部品 |
| WO2018198850A1 (ja) * | 2017-04-27 | 2018-11-01 | ポリプラスチックス株式会社 | ポリアリーレンサルファイド系樹脂組成物及びインサート成形品 |
| WO2022080129A1 (ja) * | 2020-10-16 | 2022-04-21 | ポリプラスチックス株式会社 | 水を含む流体と接触し得る車両用冷却系部品 |
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| CN108026370B (zh) | 2015-12-11 | 2021-08-06 | 提克纳有限责任公司 | 交联性聚芳硫醚组合物 |
| EP3387070A4 (en) | 2015-12-11 | 2019-08-14 | Ticona LLC | Polyarylene SULPHIDE COMPOSITION |
| WO2017161534A1 (en) | 2016-03-24 | 2017-09-28 | Ticona Llc | Composite structure |
| WO2018079704A1 (ja) * | 2016-10-31 | 2018-05-03 | ポリプラスチックス株式会社 | ポリアリーレンサルファイド系樹脂組成物及びインサート成形品 |
| JP6956109B2 (ja) * | 2016-12-09 | 2021-10-27 | ポリプラスチックス株式会社 | ポリアリーレンサルファイド系樹脂組成物及びインサート成形品 |
| JP6886587B2 (ja) | 2017-07-03 | 2021-06-16 | Dic株式会社 | 無機充填剤、ポリアリーレンスルフィド樹脂組成物、成形品およびそれらの製造方法 |
| KR102625849B1 (ko) | 2017-12-28 | 2024-01-16 | 에이치디씨폴리올 주식회사 | 기계적 특성 및 부식 특성이 우수한 폴리아릴렌 설파이드 수지 조성물 |
| WO2019208706A1 (ja) * | 2018-04-27 | 2019-10-31 | ポリプラスチックス株式会社 | ポリアリーレンサルファイド系樹脂組成物及びインサート成形品 |
| CN120530163A (zh) * | 2022-12-23 | 2025-08-22 | 恩骅力有限公司 | Pps组合物、制备方法、制品生产方法和由该组合物制成的制品 |
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| JP5916972B2 (ja) | 2016-05-11 |
| CN106062077A (zh) | 2016-10-26 |
| CN106062077B (zh) | 2017-11-03 |
| JPWO2015146718A1 (ja) | 2017-04-13 |
| KR20160091426A (ko) | 2016-08-02 |
| US20170096557A1 (en) | 2017-04-06 |
| KR101704732B1 (ko) | 2017-02-08 |
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