WO2016104083A1 - Composition de résine pour moulage sur prisonnier, et article moulé sur prisonnier - Google Patents

Composition de résine pour moulage sur prisonnier, et article moulé sur prisonnier Download PDF

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Publication number
WO2016104083A1
WO2016104083A1 PCT/JP2015/083870 JP2015083870W WO2016104083A1 WO 2016104083 A1 WO2016104083 A1 WO 2016104083A1 JP 2015083870 W JP2015083870 W JP 2015083870W WO 2016104083 A1 WO2016104083 A1 WO 2016104083A1
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insert
molded product
resin composition
resin
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PCT/JP2015/083870
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English (en)
Japanese (ja)
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恵市 小佐野
耕一 坂田
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ウィンテックポリマー株式会社
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Publication of WO2016104083A1 publication Critical patent/WO2016104083A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/40—Glass
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass
    • 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
    • C08L51/06—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 homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds

Definitions

  • the present invention relates to a resin composition for insert molding and an insert molded product.
  • Polybutylene terephthalate resin is excellent in mechanical properties, electrical properties, other physical and chemical properties, and has good processability, so it can be used as an engineering plastic for a wide range of applications such as automobile parts and electrical / electronic parts. in use.
  • a case is made with polybutylene terephthalate resin, the part body is mounted inside the case, and then it is used as a thermosetting resin such as epoxy resin or silicon resin.
  • thermosetting resin such as epoxy resin or silicon resin.
  • the insert molding method is a molding method in which an insert member such as a member made of metal is embedded in the resin so that the molded product can be used by taking advantage of the properties of the resin and the properties of conductive materials such as metal.
  • This is one of the typical molding methods.
  • Patent Documents 1 and 2 insert molding using a polybutylene terephthalate resin in which a prismatic metal member having a rectangular cross section or a prismatic metal member having a square cross section is embedded. The product is listed.
  • the temperature change during use depends on the shape of the insert molded product. Many troubles such as cracking occurred.
  • the conductive member to be embedded in the polybutylene terephthalate resin is an insert member having a small thickness (for example, a plate-like member having an average thickness of 3 mm or less), it has heat shock resistance. An insert molded product sufficient for practical use was not obtained.
  • the present invention has been made in order to solve the above-described problems, and an object of the present invention is to obtain poly (butylene terephthalate) having excellent heat shock resistance and an insert molded product in which a plate-like member is embedded as an insert member.
  • the object is to provide a resin composition.
  • the inventors of the present invention have made extensive studies to solve the above problems.
  • the conductive member to be insert-molded has a thickness. Even if it is a thin plate-shaped member, it has been found that an insert-molded product having excellent heat shock resistance can be obtained, and the present invention has been completed. More specifically, the present invention provides the following.
  • a polybutylene terephthalate resin a fibrous filler having a cross-section with a profile ratio of 1.5 or more and 5.0 or less
  • an elastomer A resin composition for insert molding, wherein the elastomer is a modified ethylene copolymer obtained by graft polymerization of one or more selected from the group consisting of maleic acid and acid derivatives thereof.
  • FIG. 1 is a diagram showing a cross-section of a fibrous filler having a cross-section with an odd-shape ratio of a / b and an oval shape.
  • FIG. 2 is a diagram showing a cross-section of a fibrous filler having a cross-section with an irregularity ratio of a / b and a shape of a bowl.
  • FIG. 3 is a diagram showing an example of the shape of the insert molded product in the present invention.
  • FIG. 4 is a diagram illustrating an example of the shape of an insert molded product including a prismatic insert member.
  • the resin composition for insert molding of the present invention includes a polybutylene terephthalate resin, a fibrous filler having a cross-section with a profile ratio of 1.5 or more and 5.0 or less, and a specific elastomer.
  • a specific elastomer elastomer
  • the polybutylene terephthalate resin which is the base resin of the resin composition for insert molding of the present invention is a dicarboxylic acid containing at least terephthalic acid or an ester-forming derivative thereof (such as a lower alcohol ester).
  • PBT resin polybutylene terephthalate resin obtained by polycondensation of a component and a glycol component containing at least a C4 alkylene glycol (1,4-butanediol) or an ester-forming derivative thereof.
  • the PBT resin is not limited to a homo PBT resin, but may be a copolymer (copolymerized PBT resin) containing 60 mol% or more (particularly about 75 mol% or more and 95 mol% or less) of a butylene terephthalate unit.
  • a polybutylene terephthalate resin can be used individually by 1 type or in combination of 2 or more types.
  • dicarboxylic acid components other than terephthalic acid and its ester-forming derivatives
  • aromatic dicarboxylic acid components isophthalic acid, phthalic acid, naphthalenedicarboxylic acid, diphenyl ether dicarboxylic acid, etc. 6 to C 12 aryl dicarboxylic acids
  • aliphatic dicarboxylic acid components C 4 to C 16 alkyl dicarboxylic acids such as succinic acid, adipic acid, azelaic acid, sebacic acid, and C 5 to C 10 cycloalkyl such as cyclohexane dicarboxylic acid
  • dicarboxylic acid components can be used alone or in combination of two or more.
  • Preferred dicarboxylic acid components include aromatic dicarboxylic acid components (especially C 6 -C 10 aryl dicarboxylic acids such as isophthalic acid), aliphatic dicarboxylic acid components (especially C such as adipic acid, azelaic acid and sebacic acid). 6 ⁇ C 12 alkyl dicarboxylic acids) are included.
  • glycol components (comonomer components) other than 1,4-butanediol include, for example, aliphatic diol components [for example, alkylene glycol (ethylene glycol, propylene glycol, trimethylene glycol, 1,3-butylene, etc.).
  • glycol hexamethylene glycol, neopentyl glycol, C 2 ⁇ C 10 alkylene glycols such as 1,3-octanediol, diethylene glycol, triethylene glycol, polyoxy C 2 ⁇ C 4 alkylene glycol such as dipropylene glycol, etc.), cyclohexane dimethanol
  • Alicyclic diols such as methanol and hydrogenated bisphenol A
  • aromatic diol components aromatic alcohols such as bisphenol A and 4,4-dihydroxybiphenyl, C of bisphenol A 2 to C 4 alkylene oxide adducts (eg, ethylene oxide 2 mol adduct of bisphenol A, propylene oxide 3 mol adduct of bisphenol A, etc.), or ester-forming derivatives thereof.
  • glycol component includes an aliphatic diol component (in particular, C 2 ⁇ C 6 alkylene glycol, polyoxy C 2 ⁇ C 3 alkylene glycol such as diethylene glycol, cyclohexane alicyclic diols dimethanol, etc.) .
  • aliphatic diol component in particular, C 2 ⁇ C 6 alkylene glycol, polyoxy C 2 ⁇ C 3 alkylene glycol such as diethylene glycol, cyclohexane alicyclic diols dimethanol, etc.
  • any of the homo PBT resin or copolymer PBT resin produced by polycondensation using the compound as a monomer component can be used as the PBT resin in the present invention.
  • the homo PBT resin and copolymer PBT resin can be used alone or in admixture of two or more. Further, the combined use of an unmodified PBT resin (homo PBT resin) and a copolymerized PBT resin is also useful.
  • a thermoplastic branched PBT resin belonging to the category of the copolymerized PBT resin can also be used. This is a polyester resin mainly composed of so-called polybutylene terephthalate or butylene terephthalate monomer and having a branched structure by reaction with a polyfunctional compound.
  • Polyfunctional compounds include aromatic polycarboxylic acid components (trimesic acid, trimellitic acid, pyromellitic acid and alcohol esters thereof), polyol components (glycerin, trimethylolethane, trimethylolpropane, pentaerythritol, etc.) Can be illustrated.
  • Fibrous filler having a cross section with an irregularity ratio of 1.5 to 5.0 In the resin composition for insert molding of the present invention, a fibrous filler having a cross section with an irregularity ratio of 1.5 or more and 5.0 or less (hereinafter referred to as a fibrous filler having a section with an irregularity ratio of 1.5 or more and 5.0 or less) May be referred to as “fibrous filler in the present invention.”) Is used as a reinforcing material, and can improve heat shock resistance of an insert molded product obtained from the above resin composition for insert molding.
  • the fibrous filler in the present invention is less likely to be oriented along the flow direction of the resin during molding than a normal fibrous filler (for example, a fibrous filler having a profile ratio of 1). Therefore, by adding the fibrous filler in the present invention to the resin composition, the anisotropy of the shrinkage rate in the obtained molded product is reduced. “The anisotropy of shrinkage is reduced” means that the difference between the shrinkage in the direction along the flow direction of the resin during molding and the shrinkage in the direction perpendicular to the flow direction is reduced. Moreover, it is estimated that the anisotropy of the linear expansion coefficient in the obtained molded article is also suppressed by adding the fibrous filler in the present invention to the resin composition.
  • the fibrous filler in this invention can be used individually by 1 type or in combination of 2 or more types.
  • cross section refers to a cross section perpendicular to the major axis direction of the fibrous filler.
  • profile ratio refers to the ratio of the major axis to the minor axis (major axis / minor axis) in the cross section of the fibrous filler.
  • the profile ratio of the cross section is 1.5 or more and 5.0 or less, preferably 1.8 or more and 4.0 or less, more preferably 2.0 or more and 3.5 or less.
  • the deformed ratio When the deformed ratio is less than 1.5, an insert-molded product obtained from the resin composition for insert molding is less likely to have good heat shock resistance, and dimensional stability is likely to decrease due to warpage. When the deformed ratio is more than 5.0, the heat shock resistance of an insert-molded product obtained from the resin composition for insert molding is hardly improved.
  • the cross-sectional shape of the fibrous filler in the present invention is not particularly limited as long as the cross-sectional deformation ratio is 1.5 or more and 5.0 or less, but a convex shape is preferable.
  • the convex shape refers to a shape that is not a shape having a recessed portion (for example, a bowl shape). Examples of the convex shape include an oval shape, an oval shape, an oval shape, a polygonal shape, and the like, and in particular, an oval shape is preferable because it tends to be excellent in mechanical strength and heat shock resistance. .
  • an oval refers to a shape composed of two line segments and two curves (for example, an arc, an elliptical arc, and other curves) that connect the two line segments.
  • a represents the major axis
  • b represents the minor axis
  • the profile ratio is calculated as a / b.
  • fibrous filler in the present invention, glass fiber, asbestos fiber, carbon fiber, silica fiber, silica / alumina fiber, zirconia fiber, boron nitride fiber, silicon nitride fiber, boron fiber, potassium titanate fiber, stainless steel, aluminum , Metal fibrous materials such as titanium, copper, and brass.
  • a typical fibrous filler is glass fiber or carbon fiber, and glass fiber is particularly preferable. In using these fibrous fillers, it is desirable to use a sizing agent or a surface treatment agent if necessary.
  • the length of the fibrous filler in the present invention is not particularly limited, but is preferably 2.0 mm or more and 5.0 mm or less, more preferably 2.5 mm or more and 4.0 mm or less.
  • the major axis and minor axis of the cross section of the fibrous filler in the present invention are not particularly limited, but the major axis is preferably 10 ⁇ m or more and 26 ⁇ m or less, more preferably 12 ⁇ m or more and 20 ⁇ m or less, and the minor axis is preferably 5 ⁇ m. They are 13 micrometers or less, More preferably, they are 6 micrometers or more and 10 micrometers or less.
  • the compounding amount of the fibrous filler in the present invention in the resin composition for insert molding is preferably 20 parts by mass or more and 150 parts by mass or less, more preferably 30 parts by mass or more and 130 parts by mass with respect to 100 parts by mass of the polybutylene terephthalate resin. It is 40 mass parts or more and 110 mass parts or less still more preferably.
  • the blending amount of the fibrous filler in the present invention is in the above range, it becomes easy to improve the mechanical strength and heat shock resistance of the insert molded product obtained from the resin composition for insert molding.
  • the resin composition for insert molding of the present invention may contain a fibrous filler other than the fibrous filler in the present invention.
  • the ratio of the fibrous filler in the present invention to the total of the fibrous filler in the present invention and the fibrous filler other than the fibrous filler in the present invention is preferably 50% by mass or more and 100% by mass or less, More preferably, it is 70 to 100 mass%, Most preferably, it is 90 to 100 mass%.
  • the ratio of the fibrous filler in the present invention is within the above range, the dimensional stability of the insert molded product obtained from the resin composition for insert molding is more likely to be improved.
  • the elastomer is blended in combination with the fibrous filler in the present invention, so that the strength and toughness of the insert molded product obtained from the resin composition for insert molding of the present invention is improved.
  • the balance can be improved, the heat shock resistance can be improved, and the occurrence of cracks can be suppressed.
  • the tracking resistance of the insert molded product obtained from the resin composition for insert molding of the present invention can be particularly improved by using an elastomer having a polyolefin structure with low polarity as the elastomer.
  • a modified ethylene copolymer obtained by graft polymerization of one or more selected from the group consisting of maleic acid and its acid derivative is used (hereinafter, consisting of maleic acid and its acid derivative).
  • a modified ethylene copolymer obtained by graft polymerization of one or more selected from the group may be referred to as “elastomer in the present invention”).
  • the elastomer in this invention can be used individually by 1 type or in combination of 2 or more types.
  • the reason why the heat shock resistance of the resulting insert-molded product is increased by blending the elastomer in the present invention with the resin composition is presumed to be due to the following action. That is, in the elastomer in the present invention, the low polarity structure of the polyolefin portion and the high polarity structure of the acid-modified portion are present in an appropriate ratio. Therefore, the elastomer according to the present invention is in close contact with the PBT resin, which is the base resin, and as a result, relieves local stress that may occur in the insert molded product and improves the heat shock resistance of the insert molded product. It is guessed.
  • the elastomer in the present invention includes a modified ethylene polymer obtained by graft polymerization of maleic acid and / or an acid derivative thereof to an unmodified ethylene polymer (such as an ethylene polymer or a copolymer of ethylene and an ⁇ -olefin having 3 or more carbon atoms). Copolymers can be used.
  • the unmodified ethylene polymer is a copolymer of ethylene and an ⁇ -olefin having 3 or more carbon atoms
  • examples of the ⁇ -olefin include propylene, butene-1, hexene-1, decene-1, and 4-methylbutene-1. 4-methylpentene-1 and the like.
  • Maleic acid and its acid derivatives include maleic acid, maleic anhydride, maleic imide and the like.
  • the amount of the elastomer in the present invention in the resin composition for insert molding is preferably 5.0 parts by mass or more and 30 parts by mass or less, preferably 10 parts by mass or more and 25 parts by mass with respect to 100 parts by mass of the polybutylene terephthalate resin. More preferably, it is more preferably 15 parts by mass or more and 20 parts by mass or less. If the compounding quantity of the elastomer in this invention exists in the said range, the heat shock resistance of the insert molded product obtained from the resin composition for insert molding can be improved further easily.
  • the resin composition for insert molding of the present invention may contain an elastomer other than the elastomer in the present invention, but the elastomer in the present invention relative to the total of the elastomer in the present invention and the elastomer other than the elastomer in the present invention.
  • the ratio is preferably 50% by mass or more, and more preferably 70% by mass or more. When the ratio of the elastomer in the present invention is within the above range, the heat shock resistance of an insert molded product obtained from the resin composition for insert molding can be easily increased.
  • the insert molding resin composition of the present invention is generally known to be added to thermoplastic resins and thermosetting resins in order to impart desired characteristics according to the purpose within a range that does not impair the effects of the present invention.
  • Substances such as stabilizers (antioxidants, ultraviolet absorbers, etc.), antistatic agents, flame retardants, flame retardant aids, colorants (dyes, pigments, etc.), lubricants, mold release agents, crystallization accelerators It is possible to add a crystal nucleating agent or the like.
  • the resin composition for insert molding of the present invention can be easily prepared using equipment and methods generally used for preparing a resin composition. For example, (1) after mixing each component, kneaded and mixed with a single-screw or twin-screw extruder, extruded to prepare pellets, and then molded, (2) once prepared pellets with different compositions, Any method can be used, such as a method in which a predetermined amount of the pellets are mixed and subjected to molding to obtain a molded product of the desired composition after molding, or (3) a method in which one or more of each component is directly charged into a molding machine. Further, a method of adding a part of the resin component as a fine powder and mixing it with other components is a preferable method for achieving uniform blending of these components.
  • the insert molded product of the present invention is obtained by insert molding the insert molding resin composition of the present invention and a conductive plate member.
  • the insert molded product of the present invention has a structure in which all or part of the surface of a conductive plate-like member that is an insert is covered with a resin member made of a resin composition for insert molding.
  • the shape of the conductive plate-like member in the present invention is not particularly limited as long as the thickness is 3 mm or less on average, preferably 2 mm or less on average.
  • the thickness of the plate-like member means a length in a direction perpendicular to the surface of the plate-like member covered with the resin member.
  • the composition of the resin composition for obtaining an insert molded product having heat shock resistance can vary depending on the thickness of the insert member in the insert molded product.
  • the resin composition for insert molding of the present invention has been found as a suitable composition in the production of an insert molded product into which a conductive plate member having an average thickness of 3 mm or less is inserted.
  • the resin composition for insert molding of the present invention includes, for example, a prismatic insert member having an average thickness of 8 mm or more, or an insert member (for example, shown in FIG. 4 having a square shape with a cross section of 10 mm or more). Even if it is used for coating such as an insert member, the obtained insert molded product may not have sufficient heat shock resistance.
  • the lower limit of the thickness of the conductive plate member in the present invention is not particularly limited, but is usually 0.1 mm.
  • the conductive plate member in the present invention is not particularly limited, and examples thereof include metals and inorganic solids.
  • the metal include aluminum, magnesium, stainless steel, and copper
  • examples of the inorganic solid include ceramic.
  • the thickness of the conductive plate-like member in the present invention is sufficient if the average is 3 mm or less, and the thickness of the plate-like member may be uniform or non-uniform. From the viewpoint that the effects of the present invention are easily achieved, the thickness of the conductive plate-like member in the present invention is preferably substantially uniform.
  • an area may be 10 mm ⁇ 2 > or more.
  • the shape of the conductive plate member in the present invention is not particularly limited, but is L-shaped, U-shaped, square, rectangular, etc., and the cross-section in the thickness direction of the plate-shaped member is rectangular, oval, etc. Some are listed.
  • the insert-molded product shown in FIG. 3 uses a plate-shaped member that is L-shaped and has a rectangular cross section in the thickness direction.
  • the conductive plate-like member in the present invention may be flat without undulations, but may be bent or punched.
  • Insert molding can be performed by a conventionally known method.
  • the thickness of the resin member covering the conductive plate-like member is not particularly limited, but is usually 3 mm or less on average, preferably 2 mm or less on average.
  • the lower limit of the thickness of the resin member is not particularly limited, but is usually 0.1 mm.
  • the thickness of the resin member covering the conductive plate member is, in principle, the shortest distance from the outer surface of the insert-molded product (that is, the outer surface of the resin member) to the plate member surface.
  • the thickness of the resin member covering the conductive plate-like member Means (1) the shortest distance from the outer surface of the insert molded product to the surface of the plate member, or (2) the shortest distance between the plate members. It is preferable that at least one of (1) and (2) is in the above range, and it is more preferable that all of (1) and (2) are in the above range.
  • the insert molded product of the present invention may be one in which the entire surface of the conductive plate-like member is covered with a resin member, or only a part thereof may be covered.
  • FIG. 3A shows an example of an insert molded product in which a part of an L-shaped plate member is covered with a resin member.
  • the ratio of the volume of the plate-like member in the entire insert molded product may be 10% or more and 90% or less.
  • the insert molded product of the present invention is excellent in heat shock resistance. Moreover, the insert-molded product of the present invention can also be excellent in tracking resistance.
  • the heat shock resistance of the insert molded product can be evaluated by the method shown in the examples.
  • the surface of an L-shaped stainless steel plate-like member having a width of 21 mm ⁇ 90 mm ⁇ 90 mm and an average thickness of 1.6 mm is coated with the resin composition for insert molding of the present invention so as to have an average thickness of 1 mm.
  • the insert molded product obtained in this way can satisfy the following conditions. ⁇ Conditions> The insert molded product was subjected to a heat shock resistance test using a thermal shock tester, which was cooled at ⁇ 40 ° C. for 1 hour 30 minutes and then heated at 140 ° C. for 1 hour 30 minutes as one cycle. In this case, the number of cycles until a crack enters the insert molded product is 200 or more (preferably 350 or more).
  • Glass fiber 1 (manufactured by Nittobo Co., Ltd., product name: CSF3PE-941, cross-sectional shape: circular, profile ratio 1, cross-sectional diameter 13 ⁇ m, length 3.0 mm)
  • Glass fiber 2 (manufactured by Nitto Boseki Co., Ltd., product name: CSG3PL-830S, cross-sectional shape: oval, profile ratio 2, cross-sectional major axis 14 ⁇ m, cross-sectional minor axis 7 ⁇ m, length 3.0 mm)
  • Glass fiber 3 (manufactured by Nitto Boseki Co., Ltd., product name: CSG3PA-830, cross-sectional shape: oval, profile ratio 4, cross-sectional major axis 28 ⁇ m, cross-sectional minor axis 7 ⁇ m, length 3.0 mm)
  • an ellipse points out the shape shown in FIG.
  • a represents the major axis
  • b represents the minor axis
  • the profile ratio is calculated as a / b.
  • Elastomer Elastomer 1 maleic acid-modified ethylene copolymer, manufactured by Mitsui Chemicals, product name: Toughmer MP0610)
  • Elastomer 2 (Core-shell type elastomer, manufactured by Rohm and Haas, product name: Paraloid EXL2314)
  • Elastomer 3 ethylene ethyl acrylate, manufactured by NUC, product name: NUC-6570
  • Examples 1 to 5 and Comparative Examples 1 to 6 A mixture in which polybutylene terephthalate resin, glass fiber, and elastomer were mixed in the proportions (unit: part by mass) shown in Tables 1 and 2 was prepared to obtain a resin composition for insert molding. Next, using the resin composition, an insert molded product was produced under the conditions of a resin temperature of 260 ° C., a mold temperature of 80 ° C., an injection time of 10 seconds, and a cooling time of 10 seconds. In addition, the following two types of insert-molded products were produced from each resin composition. ⁇ Insert molded product-1 (Busbar type) A plate-like member (made of stainless steel) having the shape shown in FIG.
  • Busbar type A plate-like member (made of stainless steel) having the shape shown in FIG.
  • FIG. 3 (B) was coated with each resin composition to produce an insert-molded product having the shape shown in FIG. 3 (A).
  • the insert molded product corresponds to an insert molded product in which a plate-like member is embedded.
  • the resin member in this insert molded product was produced by filling resin from the side gate (width 4 mm, thickness 3 mm) in FIG. ⁇ Insert molded product-2 (square column type)
  • a prismatic member made of stainless steel
  • the resin member in this insert molded product was produced by filling resin from the pin gate (diameter 1 mm) in the position shown by the arrow in FIG.
  • Heat shock resistance With respect to the above insert molded product (busbar type or prismatic type), using a thermal shock tester, the process of cooling at ⁇ 40 ° C. for 1 hour 30 minutes and then heating at 140 ° C. for 1 hour 30 minutes is one cycle resistance. A heat shock test was performed, and the number of cycles until the molded product was cracked was measured to evaluate heat shock resistance. In addition, heat shock resistance was ranked based on the following evaluation criteria. In Tables 1 and 2, in the “heat shock resistance” section, the lower numerical value indicates the number of cycles at the time when the molded product is cracked.
  • the position where the height is measured is that when a square having a side of 114 mm is placed on the main plane of the flat resin molded product so that the distance from each side of the main plane is 3 mm, It is the position corresponding to the vertex, the midpoint of each side of this square, and the center of this square.
  • the height from the horizontal plane was the same as the average height, and a plane parallel to the horizontal plane was used as a reference plane.
  • the maximum height and the minimum height from the reference plane were selected from the heights measured at the nine locations, and the difference between them was calculated.
  • the above difference was calculated, and the obtained five values were averaged to obtain a flatness value.
  • flatness was ranked based on the following evaluation criteria. In Tables 1 and 2, in the term “flatness”, the lower numerical value indicates an average value (unit: mm) of the obtained five values. 10 mm or more: ⁇ 3 mm or more and less than 10 mm: ⁇ Less than 3mm: ⁇
  • CTI Comparative tracking index
  • the heat resistance that the number of cycles is 200 or more (further 350 or more).
  • the section of “Heat shock resistance (square column type)” in Table 1 an insert molded product in which an insert member that is not a plate-like member is embedded using the resin composition for insert molding of the present invention.
  • the composition of the resin composition for obtaining an insert molded product having heat shock resistance can vary depending on the thickness of the insert member in the insert molded product.

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Abstract

La présente invention vise à procurer une composition de résine de poly(téréphtalate de butylène) qui peut être utilisée pour la production d'un article moulé sur prisonnier dans lequel un élément en forme de plaque est intégré en tant qu'élément d'insertion et qui présente une excellente résistance aux chocs thermiques. La présente invention concerne une composition de résine pour le moulage sur prisonnier, qui comprend une résine de poly(téréphtalate de butylène), une charge fibreuse qui a une aire en coupe transversale ayant un rapport de modification de 1,5 à 5,0 inclus et un élastomère, l'élastomère étant un copolymère d'éthylène modifié produit par la mise en œuvre de la polymérisation par greffage d'au moins un composé choisi dans le groupe constitué par l'acide maléique et les dérivés de ce dernier.
PCT/JP2015/083870 2014-12-26 2015-12-02 Composition de résine pour moulage sur prisonnier, et article moulé sur prisonnier WO2016104083A1 (fr)

Applications Claiming Priority (2)

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JP2014-265988 2014-12-26
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