WO2023105955A1 - Composition de résine de polyalkylène téréphtalate, procédé de production de composition de résine de polyalkylène téréphtalate et article moulé - Google Patents

Composition de résine de polyalkylène téréphtalate, procédé de production de composition de résine de polyalkylène téréphtalate et article moulé Download PDF

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WO2023105955A1
WO2023105955A1 PCT/JP2022/039482 JP2022039482W WO2023105955A1 WO 2023105955 A1 WO2023105955 A1 WO 2023105955A1 JP 2022039482 W JP2022039482 W JP 2022039482W WO 2023105955 A1 WO2023105955 A1 WO 2023105955A1
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terephthalate resin
polyalkylene terephthalate
resin composition
epoxy compound
acid
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PCT/JP2022/039482
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English (en)
Japanese (ja)
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樹 斎藤
吉弘 浅井
博樹 深津
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ポリプラスチックス株式会社
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Publication of WO2023105955A1 publication Critical patent/WO2023105955A1/fr

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    • 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
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
    • 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

  • Embodiments of the present invention relate to polyalkylene terephthalate resin compositions, methods for producing polyalkylene terephthalate resin compositions, and molded articles.
  • Polyalkylene terephthalate resins are used in many applications due to their excellent properties such as heat resistance, chemical resistance, electrical properties, mechanical properties, and moldability.
  • polyalkylene terephthalate resin since polyalkylene terephthalate resin has an ester group in its molecule, it tends to deteriorate in physical properties due to hydrolysis in a high-temperature, high-humidity environment.
  • a method for improving the hydrolysis resistance of polyalkylene terephthalate resin for example, adding a compound containing an epoxy group or a compound containing a carbodiimide group is known (for example, Patent Document 1).
  • the compound containing the epoxy group when added to the polyalkylene terephthalate resin composition, the compound containing the epoxy group may increase in viscosity during melt processing, or deposits may occur on the screw or the like.
  • the carbonized deposits are mixed in the molded product as black foreign matter, which may cause deterioration of the appearance of the molded product.
  • An object of the embodiments of the present invention is to provide a polyalkylene terephthalate resin composition capable of improving hydrolysis resistance and reducing the generation of foreign matter, and a molded article obtained using the same.
  • One embodiment of the present invention relates to a polyalkylene terephthalate resin composition containing (A) 100 parts by mass of a polyalkylene terephthalate resin and (B) 0.10 to 10 parts by mass of an epoxy compound satisfying the following formula (1): . (M ⁇ 2) + N ⁇ 6 Formula (1)
  • M represents the number of epoxy groups in one molecule of the epoxy compound (B)
  • N represents the number of hydroxyl groups in one molecule of the epoxy compound (B).
  • Another embodiment of the present invention relates to a method for producing the polyalkylene terephthalate resin composition of the above embodiment, which comprises melt-kneading the (A) polyalkylene terephthalate resin and the (B) epoxy compound.
  • Another embodiment of the present invention relates to a molded article obtained using the polyalkylene terephthalate resin composition of the above embodiment.
  • a polyalkylene terephthalate resin composition according to an embodiment of the present invention contains at least (A) a polyalkylene terephthalate resin and (B) an epoxy compound.
  • Polyalkylene terephthalate resin is a reaction between a dicarboxylic acid component mainly composed of a dicarboxylic acid compound and/or an ester-forming derivative thereof and a diol component mainly composed of a diol compound and/or an ester-forming derivative thereof.
  • the polyalkylene terephthalate resin includes a dicarboxylic acid component and a diol component other than the main component, and other copolymerizable monomers such as an oxycarboxylic acid component and a lactone component (hereinafter sometimes referred to as copolymerizable monomers). ) can also be used.
  • Dicarboxylic acid components other than the main component include, for example, aliphatic dicarboxylic acids (e.g., succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedicarboxylic acid, dothecanedicarboxylic acid, hexadecane dicarboxylic acid, dicarboxylic acid of about C4-40 such as dimer acid, preferably dicarboxylic acid of about C4-14 ), alicyclic dicarboxylic acid (e.g., succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedicarboxylic acid, dothecanedicarboxylic acid, hexadecane dicarboxylic acid, dicarboxylic acid of about C4-40 such as dimer acid, preferably dicarboxylic acid of about
  • hexahydrophthalic acid hexahydroisophthalic acid, hexahydroterephthalic acid
  • C 4-40 dicarboxylic acids such as hymic acid, preferably C 8-12 dicarboxylic acids
  • aromatic dicarboxylic acids other than terephthalic acid e.g., phthalic acid, isophthalic acid, methylisophthalic acid, methyl terephthalic acid , 2,6-naphthalenedicarboxylic acid, 4,4′-biphenyldicarboxylic acid, 4,4′-diphenoxyetherdicarboxylic acid, 4,4′-dioxybenzoic acid, 4,4′-diphenylmethanedicarboxylic acid acids, C8-16 dicarboxylic acids such as 4,4′-diphenylketonedicarboxylic acid), or derivatives thereof (for example, lower alkyl esters, aryl esters, ester-forming derivatives such as acid anhydrides), etc.
  • Preferred dicarboxylic acid components to be used in combination with terephthalic acid include isophthalic acid and naphthalenedicarboxylic acid, and two or more of these can be used in combination. However, preferably 50 mol % or more, more preferably 80 mol % or more, and particularly preferably 90 mol % or more of the entire dicarboxylic acid component as a copolymerizable monomer is aromatic dicarboxylic acid compound. Furthermore, if necessary, polycarboxylic acids such as trimellitic acid and pyromellitic acid, or ester-forming derivatives thereof (such as alcohol esters) may be used in combination. A branched polyalkylene terephthalate resin can also be obtained by using such a polyfunctional compound in combination.
  • Diol components other than the main component include aliphatic alkanediols (e.g., ethylene glycol, trimethylene glycol, propylene glycol, 1,4-butanediol, 1,3-butanediol, neopentyl glycol, hexanediol, octanediol, Aliphatic diols of about C 2-12 such as decanediol, preferably aliphatic diols of about C 2-10 , aliphatic alkane diols other than those used as the main component), polyoxyalkylene glycols (C 2- Glycols having a plurality of oxyalkylene units of about 4 , such as diethylene glycol, dipropylene glycol, ditetramethylene glycol, triethylene glycol, tripropylene glycol, polytetramethylene glycol, etc.), alicyclic diols (e.g., 1,4- cyclo
  • Aromatic diols such as hydroquinone, resorcinol, bisphenol, 2,2-bis(4-hydroxyphenyl)propane, 2,2-bis-(4-(2-hydroxyethoxy)phenyl)propane and xylylene glycol can also be used in combination. You may However, preferably 50 mol % or more, more preferably 80 mol % or more, and particularly preferably 90 mol % or more of the entire diol component as a copolymerizable monomer is alkylene glycol.
  • a polyol such as glycerin, trimethylolpropane, trimethylolethane, pentaerythritol, or an ester-forming derivative thereof may be used in combination.
  • a branched thermoplastic polyester resin can also be obtained by using such a polyfunctional compound in combination.
  • Oxycarboxylic acids include, for example, oxycarboxylic acids such as oxybenzoic acid, oxynaphthoic acid, hydroxyphenylacetic acid, glycolic acid, oxycaproic acid, and derivatives thereof.
  • Lactones include C 3-12 lactones such as propiolactone, butyrolactone, valerolactone, caprolactone (eg, ⁇ -caprolactone, etc.) and the like.
  • the proportion of the copolymerizable monomer can be selected, for example, from a range of about 0.01 mol% to 30 mol%, usually about 1 mol% to 25 mol%, preferably 3 mol%. It is more than about 20 mol % or less, more preferably about 5 mol % or more and 15 mol % or less. Further, when homopolyester and copolyester are used in combination, the proportion of homopolyester and copolyester is such that the proportion of copolymerizable monomers is 0.01 mol% or more and 30 mol% or less with respect to all monomers.
  • the former/latter 99/1 to 1/99 (mass ratio), preferably 95/5 to 5/95 (mass ratio), more preferably 90/10 to 10/90 (mass ratio).
  • Preferable polyalkylene terephthalate resins include homopolyesters or copolyesters containing alkylene terephthalate units as a main component (for example, about 50 to 100 mol %, preferably about 75 to 100 mol %) [for example, polyethylene terephthalate (PET), polytriphthalate, Homopolyesters such as methylene terephthalate (PTT), poly( C2-4 alkylene terephthalate such as polybutylene terephthalate (PBT)), copolyesters containing alkylene terephthalate units as main components and alkylene isophthalate units as copolymer components, alkylene terephthalates unit as a main component and an alkylene naphthalate unit as a copolymerization component], and these can be used singly or in combination of two or more.
  • PTT polyethylene terephthalate
  • PBT polytriphthalate
  • Homopolyesters such as methylene terephthalate
  • Particularly preferred polyalkylene terephthalate resins are homopolyester resins or copolyester resins (e.g., Polyethylene terephthalate resin, polytrimethylene terephthalate resin, polybutylene terephthalate resin, isophthalic acid-modified polyethylene terephthalate resin, isophthalic acid-modified polytrimethylene terephthalate resin, isophthalic acid-modified polybutylene terephthalate resin, naphthalenedicarboxylic acid-modified polyethylene terephthalate resin, naphthalenedicarboxylic acid modified polytrimethylene terephthalate resin, naphthalenedicarboxylic acid-modified polybutylene terephthalate resin, etc.).
  • homopolyester resins or copolyester resins e.g., Polyethylene terephthalate resin, polytrimethylene terephthalate resin, polybutylene terephthalate resin, isophthalic acid-
  • polyethylene terephthalate resin and polybutylene terephthalate resin are preferred, and polybutylene terephthalate resin is particularly preferred.
  • the amount of terminal carboxyl groups in the polyalkylene terephthalate resin is not particularly limited as long as it does not inhibit the effects of the present invention. From the viewpoint of hydrolysis resistance, the amount of terminal carboxyl groups in (A) the polyalkylene terephthalate resin is preferably 30 meq/kg or less, more preferably 25 meq/kg or less.
  • the intrinsic viscosity (IV) of the polyalkylene terephthalate resin is not particularly limited as long as it does not impair the effects of the present invention.
  • the intrinsic viscosity of the polyalkylene terephthalate resin is preferably 0.6 to 1.3 dL/g, more preferably 0.7 to 1.2 dL/g. When a polyalkylene terephthalate resin having an intrinsic viscosity within this range is used, the obtained polyalkylene terephthalate resin composition is particularly excellent in moldability. Also, polyalkylene terephthalate resins with different intrinsic viscosities can be blended to adjust the intrinsic viscosity.
  • a polyalkylene terephthalate resin with an intrinsic viscosity of 0.9 dL/g is prepared by blending a polyalkylene terephthalate resin with an intrinsic viscosity of 1.0 dL/g and a polyalkylene terephthalate resin with an intrinsic viscosity of 0.8 dL/g. can be done.
  • the intrinsic viscosity (IV) of the polyalkylene terephthalate resin can be measured, for example, in o-chlorophenol at a temperature of 35°C.
  • polyalkylene terephthalate resin (A) As the polyalkylene terephthalate resin (A), a commercially available product may be used. A dicarboxylic acid component or a reactive derivative thereof, a diol component or a reactive derivative thereof, and, if necessary, a (polycondensation) by a method such as transesterification or direct esterification. Moreover, the production thereof may be carried out in any state of a molten state, a solid phase state, or a solution state.
  • epoxy compounds can be used to improve the hydrolysis resistance of polyalkylene terephthalate resins.
  • the epoxy compound when added to the polyalkylene terephthalate resin composition, the epoxy compound may increase in viscosity during melt processing, and deposits may occur on the screw or the like.
  • the epoxy compound has a hydroxyl group, the ester exchange reaction with the polyalkylene terephthalate resin causes an increase in viscosity, which tends to cause deposits on the screw.
  • the carbonized deposits are mixed in the molded product as black foreign matter, which may cause deterioration of the appearance of the molded product.
  • the polyalkylene terephthalate resin composition contains 0.10 to 10 parts by mass of the epoxy compound satisfying the formula (1) with respect to 100 parts by mass of the polyalkylene terephthalate resin (A), the hydrolysis resistance is improved. In addition, the generation of foreign matter can be reduced.
  • (M ⁇ 2)+N in formula (1) is preferably 6 or less, more preferably 4 or less.
  • the (B) epoxy compound preferably has two or more epoxy groups per molecule.
  • the epoxy compound (B) preferably has 3 or less epoxy groups in one molecule, more preferably 2 or less.
  • the epoxy compound preferably has 1 to 3 epoxy groups, more preferably 2, in one molecule.
  • the (B) epoxy compound preferably has 2 or less hydroxyl groups in one molecule, more preferably 1 or less, and further preferably does not contain hydroxyl groups.
  • the number average molecular weight of the epoxy compound is not particularly limited, but from the viewpoint of reducing foreign matter, the number average molecular weight of the epoxy compound is preferably 3000 or less, more preferably 1500 or less, and even more preferably 1000 or less.
  • the number average molecular weight of the epoxy compound is preferably 100 or more, more preferably 150 or more, and even more preferably 200 or more.
  • the number average molecular weight of the epoxy compound is, for example, preferably 100 to 3,000, more preferably 150 to 1,500, even more preferably 200 to 1,000.
  • the number average molecular weight of the epoxy compound can be obtained by gel permeation chromatography (GPC) in terms of polystyrene.
  • the epoxy compound is not particularly limited as long as it has one or more epoxy groups in one molecule and satisfies formula (1).
  • the epoxy compound (B) is preferably a non-aromatic epoxy compound.
  • a non-aromatic epoxy compound means a non-aromatic epoxy compound containing no aromatic ring in the molecule.
  • Alicyclic epoxy compounds are more preferable as non-aromatic epoxy compounds from the viewpoint of transesterification reactivity of hydroxyl groups generated after the reaction between the epoxy compound and the carboxylic acid terminal of the polyalkylene terephthalate resin.
  • alicyclic epoxy compound for example, a compound containing a cycloalkene oxide structure is preferred.
  • the cycloalkene oxide structure is, for example, a cyclohexene oxide structure, a cyclopentene oxide structure, etc., in which two adjacent carbon atoms among atoms constituting an aliphatic ring form an epoxy group together with an oxygen atom.
  • the alicyclic epoxy compound preferably contains one or more, more preferably two or more, cycloalkene oxide structures in one molecule.
  • Epoxy compounds include, for example, polytetramethylene glycol diglycidyl ether, ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, ethylhexyl glycidyl ether, 1,4-cyclohexanedimethanol diglycidyl ether, and tripropylene glycol diglycidyl.
  • glycidyl ether compounds such as ether, neopentyl glycol diglycidyl ether, trimethylolpropane triglycidyl ether, bisphenol A type epoxy resin; Glycidyl ester compounds such as diglycidyl terephthalate; glycidylimide compounds such as N-glycidylphthalimide; Alicyclic epoxy compounds such as 2,2-bis(3′,4′-epoxycyclohexyl)propane, 3′,4′-epoxycyclohexylmethyl 3,4-epoxycyclohexane carboxylate, and the like.
  • polytetramethylene glycol diglycidyl ether polytetramethylene glycol diglycidyl ether, ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, ethylhexyl glycidyl ether, 1,4-cyclohexanedimethanol diglycidyl ether, tripropylene glycol diglycidyl ether, neopentyl glycol
  • Non-aromatics such as diglycidyl ether, trimethylolpropane triglycidyl ether, 2,2-bis(3′,4′-epoxycyclohexyl)propane, 3′,4′-epoxycyclohexylmethyl 3,4-epoxycyclohexane carboxylate based epoxy compounds are preferred.
  • epoxy compound only one compound may be used, or two or more compounds may be used in any combination.
  • the amount of epoxy groups in the epoxy compound is not particularly limited. From the viewpoint of hydrolysis resistance, the epoxy group amount of the (B) epoxy compound with respect to the total amount of the polyalkylene terephthalate resin composition is preferably 7 mmol/kg or more, more preferably 12 mmol/kg or more, and further 15 mmol/kg or more. preferable. On the other hand, from the viewpoint of reducing foreign matter, the epoxy group amount of the (B) epoxy compound with respect to the total amount of the polyalkylene terephthalate resin composition is preferably 50 mmol/kg or less, more preferably 40 mmol/kg or less, and 30 mmol/kg or less. More preferred.
  • the epoxy group content of the (B) epoxy compound with respect to the total amount of the polyalkylene terephthalate resin composition is preferably 7 to 50 mmol/kg, more preferably 12 to 40 mmol/kg, more preferably 15 to 30 mmol/kg.
  • the amount of hydroxyl groups in the epoxy compound is not particularly limited. From the viewpoint of reducing foreign matter, the amount of hydroxyl groups in the (B) epoxy compound relative to the total amount of the polyalkylene terephthalate resin composition is preferably 40 mmol/kg or less, more preferably 30 mmol/kg or less, and even more preferably 10 mmol/kg or less.
  • the content of the (B) epoxy compound is preferably 0.10 to 10 parts by mass, preferably 0.12 to 5 parts by mass, based on 100 parts by mass of the (A) polyalkylene terephthalate resin. It is more preferably 0.15 to 2 parts by mass.
  • the content of the (B) epoxy compound is preferably 0.10 parts by mass or more, more preferably 0.12 parts by mass or more, relative to 100 parts by mass of the (A) polyalkylene terephthalate resin. , more preferably 0.15 parts by mass or more.
  • the content of the (B) epoxy compound is preferably 10 parts by mass or less, more preferably 5 parts by mass or less, and 2 parts by mass with respect to 100 parts by mass of the (A) polyalkylene terephthalate resin. Part or less is more preferable.
  • the polyalkylene terephthalate resin composition may contain other components than the above components.
  • Other components include other resins, fillers such as inorganic fillers described later, antioxidants, stabilizers, antistatic agents, lubricants, plasticizers, crystal nucleating agents, colorants, flame retardants, and flame retardant aids. and additives such as agents, and one or more of these can be contained as necessary.
  • the polyalkylene terephthalate resin composition may contain an inorganic filler.
  • an inorganic filler By containing an inorganic filler, mechanical properties and heat resistance can be improved. Also, the molding shrinkage and linear expansion coefficient of the polyalkylene terephthalate resin composition can be reduced.
  • inorganic fillers include fibrous inorganic fillers [e.g., glass fiber, asbestos fiber, silica fiber, alumina fiber, silica-alumina fiber, zirconia fiber, boron nitride fiber, silicon nitride fiber, boron fiber, potassium titanate fibers, silicon carbide fibers, whiskers (alumina, silicon nitride whiskers, etc.)], plate-like inorganic fillers [e.g., talc, mica, glass flakes, graphite, etc.], powdery inorganic fillers [e.g., glass beads, glass powder, milled fiber (milled fiber such as glass), wollastonite, etc.], and among these inorganic fillers, glass fillers (glass fiber, glass flakes, glass beads, etc.), talc, mica, wax Lastonite and the like are preferable, and among them, glass fiber can be preferably used from the viewpoint of availability, strength and rigidity.
  • fibrous inorganic fillers e.g.
  • a plate-like or powdery filler can be preferably used from the viewpoint of suppressing the anisotropy of the molding shrinkage rate and linear expansion coefficient of the polyalkylene terephthalate resin composition.
  • known surface treatment agents can be used as necessary.
  • the inorganic filler When a fibrous filler is used as the inorganic filler, its shape is not particularly limited. It is about 30 ⁇ m. Also, when a plate-like filler or powdery filler is used, the average particle size is not particularly limited, but is, for example, about 0.1 to 100 ⁇ m, more preferably about 0.1 to 50 ⁇ m. These fillers can be used singly or in combination of two or more.
  • the content of the inorganic filler is 5 parts by mass or more with respect to 100 parts by mass of the polyalkylene terephthalate resin, from the viewpoint of improving mechanical properties. It is preferably 10 parts by mass or more, more preferably 20 parts by mass or more.
  • the content of the inorganic filler is preferably 100 parts by mass or less, more preferably 90 parts by mass or less, and 80 parts by mass with respect to 100 parts by mass of the polyalkylene terephthalate resin.
  • the content of the inorganic filler is, for example, preferably 5 to 100 parts by weight, preferably 10 to 90 parts by weight, with respect to 100 parts by weight of the polyalkylene terephthalate resin. and more preferably 20 to 80 parts by mass.
  • the method for producing the polyalkylene terephthalate resin composition is not particularly limited.
  • the polyalkylene terephthalate resin composition can be produced by various methods known as methods for producing thermoplastic resin compositions.
  • a method for producing a polyalkylene terephthalate resin composition includes melt-kneading the above-mentioned (A) polyalkylene terephthalate resin and the above-mentioned (B) epoxy compound.
  • this melt-kneading step at least (A) the polyalkylene terephthalate resin and (B) the epoxy compound can be melt-kneaded.
  • the melt-kneading step for example, (A) a polyalkylene terephthalate resin, (B) an epoxy compound, and, if necessary, other components such as an inorganic filler can be melt-kneaded. These components may be melt-kneaded together or separately, or (A) the polyalkylene terephthalate resin and (B) the epoxy compound may be melt-kneaded and then the other components added.
  • a suitable method for producing a polyalkylene terephthalate resin composition includes, for example, a method of melt-kneading each component using a melt-kneading device such as a single-screw or twin-screw extruder to form extruded pellets.
  • One embodiment of the present invention relates to a molded article obtained using the polyalkylene terephthalate resin composition described above.
  • the method for obtaining a molded product using the polyalkylene terephthalate resin composition is not particularly limited, and known methods can be adopted.
  • the polyalkylene terephthalate resin composition is put into an extruder, melt-kneaded, extruded and pelletized, and the pellets are put into an injection molding machine equipped with a predetermined mold and injection molded. can be done.
  • Embodiments of the invention include, but are not limited to, the following embodiments.
  • a polyalkylene terephthalate resin composition containing (A) 100 parts by mass of a polyalkylene terephthalate resin and (B) 0.10 to 10 parts by mass of an epoxy compound satisfying the following formula (1).
  • (M ⁇ 2) + N ⁇ 6 Formula (1) (In formula (1), M represents the number of epoxy groups in one molecule of the epoxy compound (B), and N represents the number of hydroxyl groups in one molecule of the epoxy compound (B).)
  • M represents the number of epoxy groups in one molecule of the epoxy compound (B)
  • N represents the number of hydroxyl groups in one molecule of the epoxy compound (B).
  • ⁇ 3> The polyalkylene terephthalate resin composition according to ⁇ 2>, wherein (B) the epoxy compound is an alicyclic epoxy compound.
  • (B) the epoxy compound is an alicyclic epoxy compound.
  • (B) epoxy compound does not contain a hydroxyl group.
  • ⁇ 5> The polyalkylene terephthalate resin composition according to any one of ⁇ 1> to ⁇ 4>, wherein the epoxy compound (B) has two or more epoxy groups per molecule.
  • ⁇ 6> The polyalkylene terephthalate resin composition according to any one of ⁇ 1> to ⁇ 5>, further comprising an inorganic filler.
  • ⁇ 7> The method for producing the polyalkylene terephthalate resin composition according to any one of ⁇ 1> to ⁇ 6>, wherein the mixture contains the (A) polyalkylene terephthalate resin and the (B) epoxy compound. a method comprising melt-kneading the ⁇ 8> A molded article obtained using the polyalkylene terephthalate resin composition according to any one of ⁇ 1> to ⁇ 6>.
  • Tables 1 to 4 below show the compositions of the polyalkylene terephthalate resin compositions of Examples and Comparative Examples.
  • the components shown in Tables 1 to 4 below are mixed in the number of parts (parts by mass) shown in Tables 1 to 4 below, and a twin-screw extruder (TEX30 manufactured by Japan Steel Works, Ltd.) having a screw of 30 mm ⁇ is used at a cylinder temperature of 260. °C and a screw rotation speed of 130 rpm and extruded to obtain a pellet-shaped polyalkylene terephthalate resin composition.
  • TEX30 manufactured by Japan Steel Works, Ltd.
  • Polyalkylene terephthalate resin A-1 polybutylene terephthalate (PBT) resin manufactured by Polyplastics Co., Ltd. (intrinsic viscosity: 0.88 dL / g)
  • A-2 Polybutylene terephthalate (PBT) resin manufactured by Polyplastics Co., Ltd. (intrinsic viscosity: 0.69 dL / g)
  • Epoxy compound B-1 2,2-bis(3′,4′-epoxycyclohexyl)propane (molecular weight 236)
  • B-2 Polytetramethylene glycol diglycidyl ether (number average molecular weight of about 830)
  • B-3 "Epikote 1001" manufactured by Mitsubishi Chemical Corporation (bisphenol A type epoxy resin, number average molecular weight of about 900)
  • B-4 "Epikote 1004" manufactured by Mitsubishi Chemical Corporation (bisphenol A type epoxy resin, number average molecular weight of about 1650)
  • B-5 Pentaerythritol tetraglycidyl ether
  • B-6 Phenol novolac epoxy resin
  • Glass fiber C Glass fiber "CS 3J-948" manufactured by Nitto Boseki Co., Ltd.
  • Lubricant H Riken Vitamin Co., Ltd. "B-74" (diglycerin fatty acid ester)
  • the unit for the content of each component in Tables 1 to 4 is parts by mass.
  • Procedure 3 Purge with the polyalkylene terephthalate resin composition for 10 minutes at a cylinder temperature of 275° C. and a screw rotation speed of 20 rpm.
  • Step 4 Purge with polyethylene resin for 5 minutes at a cylinder temperature of 275° C. and a screw rotation speed of 60 rpm.
  • Procedure 5 Purge for 5 minutes with a purging material “Ryoclean-Z” manufactured by Toyocolor Co., Ltd. at a cylinder temperature of 200° C. and a screw rotation speed of 60 rpm.
  • Step 6 Pull out the screw, lightly wipe it with flannelette, remove the purge material, and then visually observe the amount of black deposits on the screw.

Abstract

La présente divulgation concerne une composition de résine de polyalkylène téréphtalate qui contient 100 parties en masse d'une résine de polyalkylène téréphtalate (A) et de 0,10 à 10 parties en masse d'un composé époxy (B) qui satisfait à la formule (1). Dans la formule (1), M représente le nombre de groupes époxy par molécule du composé époxy (B), et N représente le nombre de groupes hydroxyle par molécule du composé époxy (B).　Formule (1) : (M × 2) + N ≤ 6
PCT/JP2022/039482 2021-12-06 2022-10-24 Composition de résine de polyalkylène téréphtalate, procédé de production de composition de résine de polyalkylène téréphtalate et article moulé WO2023105955A1 (fr)

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