WO2014034493A1 - 難燃性熱可塑性樹脂組成物 - Google Patents
難燃性熱可塑性樹脂組成物 Download PDFInfo
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- WO2014034493A1 WO2014034493A1 PCT/JP2013/072295 JP2013072295W WO2014034493A1 WO 2014034493 A1 WO2014034493 A1 WO 2014034493A1 JP 2013072295 W JP2013072295 W JP 2013072295W WO 2014034493 A1 WO2014034493 A1 WO 2014034493A1
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- thermoplastic resin
- resin composition
- thermoplastic
- fluororesin
- flame
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/16—Condensation polymers of aldehydes or ketones with phenols only of ketones with phenols
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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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/772—Articles characterised by their shape and not otherwise provided for
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2650/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G2650/28—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type
- C08G2650/38—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type containing oxygen in addition to the ether group
- C08G2650/40—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type containing oxygen in addition to the ether group containing ketone groups, e.g. polyarylethylketones, PEEK or PEK
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
Definitions
- the present invention relates to a thermoplastic resin composition (for example, an aromatic polyether ketone resin composition) having high flame retardancy even when thin-walled, and a molded product thereof.
- a thermoplastic resin composition for example, an aromatic polyether ketone resin composition
- Aromatic polyetherketone resins such as polyetheretherketone (PEEK) are known as super engineering plastics with excellent heat resistance and mechanical properties, and have a high oxygen index and high flame retardancy. It does not burn at all, and the thin-walled molded product undergoes severe oxidative decomposition and still has insufficient flame retardancy.
- Patent Document 1 includes an aromatic polyetherketone resin and a fluororesin for the purpose of improving slidability and impact resistance, and the fluororesins are tetrafluoroethylene and perfluoroethylene. Copolymer with an aromatic unsaturated compound, the mass ratio of the aromatic polyetherketone resin to the fluororesin is 95: 5 to 50:50, and the fluororesin is particulate in the aromatic polyetherketone resin. Dispersed, a resin composition having an average dispersed particle size of fluororesin of 3 ⁇ m or less is disclosed. In the examples of this document, there is described an example in which a molded article having a thickness of 3 mm is prepared by using an aromatic polyether ketone resin and a fluororesin at a mass ratio of 80:20 to 60:40.
- Patent Document 2 discloses a polyaryl ketone resin such as polyether ether ketone in order to improve the slidability, solvent resistance and heat resistance of thin molded articles such as films.
- a resin composition containing 70 to 99% by mass and 30 to 1% by mass of a fluororesin in the form of micropowder and having an average particle size of 0.1 to 30 ⁇ m of the fluororesin dispersed in the resin composition is described.
- This document states that polytetrafluoroethylene (PTFE) is particularly preferred, and in the examples 10 to 20% by weight of PTFE is used.
- PTFE polytetrafluoroethylene
- an object of the present invention is to provide a thermoplastic resin composition having high flame retardancy even when thin-walled and a molded product thereof.
- Another object of the present invention is to provide a thermoplastic resin composition excellent in bending elasticity and non-metal corrosivity, and a molded product thereof.
- Still another object of the present invention is to provide a thermoplastic resin composition excellent in releasability and surface property (or surface smoothness) of a molded product and a molded product thereof.
- the present inventors first subjected a molded article formed of an aromatic polyether ketone resin to a combustion test based on Subject 94 (UL94) of Underwriters Laboratories, and its combustion behavior. was observed in detail.
- the thin-walled molded article formed of the aromatic polyetherketone resin had a relatively short combustion time in the first ignition, and a carbonized layer was formed on the surface of the molded article, but the carbonized layer was not uniform.
- the resin decomposes into a gas inside the molded product in the second ignition, and this gas becomes a fragile part of the uneven carbonized layer, Alternatively, it has been found that the flame retardancy is insufficient because it flows out from the portion where the carbonized layer is not formed and reacts with oxygen in the air to burn.
- the flame retardant may be used in combination with an anti-drip agent in order to prevent the resin from dripping and spreading while burning.
- an anti-drip agent in order to prevent the resin from dripping and spreading while burning.
- the effect of the anti-drip agent is not exhibited unless the anti-drip agent is used in combination with the flame retardant.
- the flame retardant since it is virtually impossible to add a flame retardant to the aromatic polyether ketone resin, there has been no idea of adding an anti-drip agent alone.
- PTFE polytetrafluoroethylene
- thermoplastic resin aromatic polyether ketone resin
- a repeating unit composed of an arylene group, an ether group, and a carbonyl group If a small amount of thermoplastic fluororesin is added, the thermoplastic fluororesin can be dispersed in a small size in the thermoplastic resin, and a carbonized layer can be uniformly formed by the first ignition. As a result, the present invention was completed.
- the flame retardant thermoplastic resin composition of the present invention is suitable for forming a thin molded article having a thin part having a thickness of 1.5 mm or less, and is composed of an arylene group, an ether group, and a carbonyl group.
- the thermoplastic resin (A) containing a repeating unit and the thermoplastic fluororesin (B) are included.
- the thermoplastic fluororesin (B) is dispersed in the form of particles in the thermoplastic resin (A) to form a dispersed phase.
- the average particle size of the dispersed phase (thermoplastic fluororesin (B) phase) may be 3 ⁇ m or less (for example, about 0.1 to 0.7 ⁇ m), preferably 0.6 ⁇ m or less.
- thermoplastic resin (A) may be a thermoplastic resin containing a repeating unit represented by any of the following formulas (a1) to (a3).
- thermoplastic fluororesin (B) is a copolymer of a radical polymerizable perfluoro monomer, for example, at least one selected from tetrafluoroethylene, hexafluoropropylene, and perfluoro (C 1-3 alkyl vinyl ether).
- the copolymer may be used.
- the flame-retardant thermoplastic resin composition is excellent in flame retardancy even when thin-walled, and when a test piece having a thickness of 0.8 mm is subjected to a vertical combustion test in accordance with UL94, the first and second times.
- the total ignition time may be 10 seconds or less.
- this invention also includes the thin molded object formed with the said flame-retardant thermoplastic resin composition.
- the flame retardant thermoplastic resin composition is melt-kneaded to disperse the thermoplastic fluororesin (B) in the thermoplastic resin (A) into particles having an average particle diameter of 3 ⁇ m or less, A method of improving the flame retardancy of the molded body by molding a thin molded body having a thin portion having a thickness of 1.5 mm or less is also included.
- thermoplastic fluororesin is dispersed in the form of fine particles in a specific aromatic thermoplastic resin, high flame retardancy can be stably exhibited even when thin-walled.
- flame retardancy can be greatly improved by adding a small amount of thermoplastic fluororesin, and the balance of non-metallic corrosiveness, flexural elasticity of molded products, releasability and surface properties (or surface smoothness) can be achieved. Is also excellent.
- the flame-retardant thermoplastic resin composition of the present invention includes a thermoplastic resin (A) having a structure in which a plurality of aromatic rings are connected via a specific linker, and a thermoplastic fluororesin (B).
- a resin composition has extremely high flame retardancy and is suitable for use in forming a thin molded article.
- thermoplastic resin (A) is particularly limited as long as it contains a repeating unit composed of an arylene group, an ether group [—O—], and a carbonyl group [—C ( ⁇ O) —].
- it includes a repeating unit represented by any of the following formulas (a1) to (a5).
- Ar represents a divalent aromatic hydrocarbon ring group which may have a substituent
- Examples of the divalent aromatic hydrocarbon ring group represented by Ar include C 6-10 arylene groups such as phenylene groups (such as o-, m- or p-phenylene groups) and naphthylene groups, biphenylene groups (2 , 2'-biphen
- aromatic hydrocarbon ring groups are substituted with, for example, a halogen atom, an alkyl group (a linear or branched C 1-4 alkyl group such as a methyl group), a haloalkyl group, a hydroxyl group, an alkoxy group ( Linear or branched C 1-4 alkoxy group such as methoxy group), mercapto group, alkylthio group, carboxyl group, sulfo group, amino group, N-substituted amino group, cyano group, etc. Good.
- the types of Ar may be the same as or different from each other.
- Desirable Ar is a phenylene group (for example, p-phenylene group) or a biphenylene group (for example, 4,4'-biphenylene group).
- Examples of the resin having the repeating unit (a1) include polyether ketone (for example, “PEEK-HT” manufactured by Victrex).
- Examples of the resin having the repeating unit (a2) include polyether ketone ketone (for example, “PEKK” manufactured by Arkema + Oxford Performance Material).
- polyether ether ketone for example, “VICTREX PEEK” manufactured by Victrex, “Vestakeep (registered trademark)” manufactured by Evonik, “Vestakeep-J” manufactured by Daicel-Evonik, Solvay®Advanced Examples include “Ketaspire (registered trademark)” manufactured by Polymers, and polyether-diphenyl-ether-phenyl-ketone-phenyl (for example, “Kadel (registered trademark)” manufactured by Solvay Advanced Polymers).
- the resin having the repeating unit (a4) include polyether ketone ether ketone ketone (for example, “VICTREX ST” manufactured by Victrex).
- resin having the repeating unit (a5) include polyether ether ketone ketone.
- the ether segment imparts flexibility to the molecular chain
- the ketone segment imparts rigidity to the molecular chain, so the more the ether segment, the faster the crystallization rate and the higher the crystallinity that can ultimately be reached. As the number of segments increases, the glass transition temperature and melting point tend to increase.
- thermoplastic resins (A) can be used alone or in combination of two or more.
- an aromatic polyetherketone resin having any one of the repeating units (a1) to (a3) in particular, a high glass transition temperature and a high melting point, and a high crystallization rate.
- an aromatic polyetherketone resin for example, polyetheretherketone having the repeating unit (a3) is preferable.
- the number average molecular weight of the thermoplastic resin (A) is not particularly limited as long as melt kneading and molding can be performed.
- 5,000 or more for example, in terms of polystyrene
- 8,000 or more eg, 10,000 to 500,000
- more preferably 15,000 or more eg, 20,000 to 100,000
- the glass transition temperature (Tg) of the thermoplastic resin (A) may be, for example, 100 ° C. or more, preferably 120 to 200 ° C., more preferably about 140 to 180 ° C. from the viewpoint of heat resistance.
- the melting point of the thermoplastic resin (A) may be, for example, 300 ° C. or higher, preferably 310 to 400 ° C., and more preferably about 320 to 380 ° C. from the viewpoint of heat resistance.
- the glass transition temperature and melting point can be measured by differential scanning calorimetry (DSC).
- Va is, for example, 50 to 4000 Pa ⁇ s, preferably 100 to 3000 Pa ⁇ s, More preferably, it may be about 150 to 2500 Pa ⁇ s, particularly about 200 to 2000 Pa ⁇ s.
- the melt viscosity is too low, the thermoplastic fluororesin (B) cannot be stably dispersed in the form of particles, and if the melt viscosity is too high, heat generation during compounding (for example, during melt kneading) increases.
- the melt viscosity can be measured using a conventional apparatus such as a capillary rheometer.
- thermoplastic resin (A) is synthesized by a nucleophilic substitution reaction such as a conventional method, for example, a method of condensing an aromatic diol component and an aromatic dihalide component, or a method of self-condensing an aromatic monohalide monool component. May be.
- aromatic diol component examples include dihydroxybenzene (such as hydroquinone) and dihydroxybenzophenone (such as 4,4'-dihydroxybenzophenone).
- aromatic dihalide component examples include dihalobenzophenone (such as 4,4'-difluorobenzophenone and 4,4'-dichlorobenzophenone).
- aromatic monohalide monool component examples include halo-hydroxybenzophenone (such as 4-fluoro-4'-hydroxybenzophenone).
- the condensation reaction may be performed in the presence of a base and / or a solvent.
- the base include alkali metal salts such as alkali metal carbonates such as (anhydrous) potassium carbonate.
- the solvent include high boiling point solvents such as diphenyl sulfone and sulfolane.
- the reaction temperature may be, for example, about 150 to 400 ° C., preferably about 200 to 350 ° C.
- the reaction product can be separated and purified by conventional separation means such as filtration, concentration, crystallization, chromatography and the like.
- the reaction product may be washed and dried as necessary.
- the cleaning solvent include water, alcohols (such as methanol and ethanol), ketones (such as acetone), and mixed solvents thereof.
- the solid reaction product may be pulverized or classified to adjust the particle size.
- the terminal group (such as a halogen atom) of the reaction product may be modified with, for example, an alkali sulfonate group (such as a lithium sulfonate group, a sodium sulfonate group, or a potassium sulfonate group) from the viewpoint of adjusting the crystallization temperature.
- an alkali sulfonate group such as a lithium sulfonate group, a sodium sulfonate group, or a potassium sulfonate group
- thermoplastic fluororesin (B) Thermoplastic fluororesin
- the thermoplastic fluororesin (B) is usually used to suppress the drop of fire and melt (drip).
- the thermoplastic resin (A) is unexpectedly used. And has a function of greatly improving flame retardancy in a small amount.
- thermoplastic fluororesin (B) is not particularly limited as long as it can be melt-molded, and examples thereof include a radical polymerizable fluorine-containing monomer alone or a copolymer. However, the thermoplastic fluororesin (B) does not include a tetrafluoroethylene homopolymer (PTFE) that cannot be melt-molded.
- PTFE tetrafluoroethylene homopolymer
- examples of the radical polymerizable fluorine-containing monomer include fluorine-containing olefin monomers (for example, mono to perfluoro C such as vinyl fluoride, vinylidene fluoride, chlorotrifluoroethylene, tetrafluoroethylene, hexafluoropropylene, etc.
- fluorine-containing vinyl ether monomers for example, perfluoro (methyl vinyl ether), perfluoro (ethyl vinyl ether), perfluoro (propyl vinyl ether), etc. mono to perfluoro (C 1-5 alkyl vinyl ether)
- fluorine-containing dioxole monomers for example, 2,2-bis (trifluoromethyl) -4,5-difluoro-1,3-dioxole, etc.
- radical polymerizable fluorine-containing monomers such as perfluoroolefin monomers (for example, perfluoro C 2-3 olefins such as tetrafluoroethylene), Perfluorovinyl ether monomers (for example, perfluoro (C 1-4 alkyl vinyl ether) such as perfluoro (propyl vinyl ether)) are preferred.
- perfluoroolefin monomers for example, perfluoro C 2-3 olefins such as tetrafluoroethylene
- Perfluorovinyl ether monomers for example, perfluoro (C 1-4 alkyl vinyl ether) such as perfluoro (propyl vinyl ether)
- a radically polymerizable fluorine-containing monomer containing at least perfluoro C2-3 olefin (tetrafluoroethylene or the like) is preferable.
- the copolymerizable monomer corresponds to the above-mentioned radical polymerizable fluorine-containing monomer and does not contain a fluorine atom, such as a fluorine-free olefin monomer (such as ethylene and propylene). C 2-4 olefins; brominated C 2-4 olefins and the like).
- the proportion of the copolymerizable monomer is 30 parts by weight or less, preferably 20 parts by weight or less, more preferably 10 parts by weight or less (for example, 0.01 parts by weight) with respect to 100 parts by weight of the radical polymerizable fluorine-containing monomer. (About 1 part by weight).
- thermoplastic fluororesins (B) include copolymers of radical polymerizable perfluoro monomers (such as tetrafluoroethylene) [for example, tetrafluoroethylene and other radical polymerizable perfluoro monomers. (Copolymers with hexafluoropropylene, perfluoro ( C1-3 alkyl vinyl ether), etc.)], for example, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoro (propyl vinyl ether) copolymer And tetrafluoroethylene-hexafluoropropylene-perfluoro (propyl vinyl ether) copolymer.
- radical polymerizable perfluoro monomers such as tetrafluoroethylene
- tetrafluoroethylene and other radical polymerizable perfluoro monomers. Copolymers with hexafluoropropylene, perfluor
- thermoplastic fluororesins (B) can be used alone or in combination of two or more.
- thermoplastic fluororesin (B) when dispersed in the thermoplastic resin (A), both the average particle size and the maximum particle size can be reduced, and the flame retardancy can be greatly improved.
- a fluoropropylene copolymer is preferred.
- thermoplastic fluororesin (B) may be subjected to surface treatment (for example, plasma treatment, fluorine gas treatment, ammonia treatment, etc.).
- the melting point of the thermoplastic fluororesin (B) is not particularly limited, and is preferably melted at a melting temperature or lower of the thermoplastic resin (A) from the viewpoint of moldability, for example, 400 ° C. or lower (eg, 200 to 380 ° C.). ), Preferably about 230 to 350 ° C. (for example, 250 to 300 ° C.).
- thermoplastic fluororesin (B) even if the addition amount (use amount) of the thermoplastic fluororesin (B) is small, high flame retardancy is exhibited. In particular, even a thin molded product exhibits high flame retardancy.
- the ratio (weight ratio) of the thermoplastic resin (A) to the thermoplastic fluororesin (B) is, for example, 90/10 to 99/1. , Preferably 92/8 to 99/1, more preferably about 95/5 to 99/1 (for example, 95.5 / 4.5 to 99/1), and 96/4 to 98.5. /1.5 (for example, about 96/4 to 98/2).
- the ratio of the thermoplastic fluororesin (B) to 100 parts by weight of the thermoplastic resin (A) may be about 1 to 5 parts by weight (for example, 1.5 to 4.5 parts by weight).
- the thermoplastic resin composition may contain other resins and / or additives as long as the effects of the present invention are not impaired.
- the resin include polyarylate, polyphenylene ether, modified polyphenylene ether (polyether nitrile, etc.), polyphenylene sulfide, polysulfone, polyether sulfone, polyketone sulfide, polybenzimidazole, polyetherimide, polyamideimide and the like.
- Additives include, for example, stabilizers (heat stabilizers, light stabilizers, etc.), fillers (for example, glass fibers, glass powders, carbon fibers, carbon powders, carbon nanotubes, metal oxides (aluminum oxide, zinc oxide, etc.)) And inorganic fillers such as metal nitrides (aluminum nitride, boron nitride, etc.), plasticizers, lubricants, colorants, and the like. These resins and additives can be used alone or in combination of two or more.
- the melt viscosity of the thermoplastic resin composition is, for example, 50 to 4000 Pa ⁇ s, preferably 100 to 3000 Pa ⁇ s, more preferably 150 to 2500 Pa ⁇ s at a temperature of 400 ° C. (or a temperature of 390 ° C.) and a shear rate of 60 s ⁇ 1 . It may be about s.
- thermoplastic resin composition has a phase separation structure, and the thermoplastic fluororesin (B) constituting the dispersed phase is dispersed in the form of particles in the thermoplastic resin (A) constituting the continuous phase.
- the dispersed phase may have an isotropic shape or an anisotropic shape.
- the average particle size of the dispersed phase (thermoplastic fluororesin (B) phase) is, for example, 3 ⁇ m or less (for example, 2 ⁇ m or less), preferably 1 ⁇ m or less (for example, 0.1 to 0.7 ⁇ m), and more preferably 0. It may be 6 ⁇ m or less (for example, about 0.2 to 0.6 ⁇ m), or may be about 0.05 to 0.8 ⁇ m.
- the average particle size of the dispersed phase (thermoplastic fluororesin (B) phase) is 0.7 ⁇ m or less, for example, 0.5 ⁇ m or less (for example, about 0.01 to 0.5 ⁇ m), preferably 0.4 ⁇ m or less. More preferably, it may be 0.3 ⁇ m or less.
- the maximum particle size of the dispersed phase may be, for example, 4 ⁇ m or less, preferably 3 ⁇ m or less (for example, 2 ⁇ m or less), more preferably 1 ⁇ m or less (for example, 0.8 ⁇ m or less).
- the dispersed phase has a particle size of a sheet of a thermoplastic resin composition, which is a conventional apparatus (transmission electron microscope (TEM), scanning electron microscope (SEM), laser microscope, atomic force microscope (AFM), etc.) Can be measured by performing microscopic observation and binarizing the obtained image in an optical analyzer.
- TEM transmission electron microscope
- SEM scanning electron microscope
- AFM atomic force microscope
- thermoplastic resin composition is excellent in flexural elasticity, and the flexural modulus may be, for example, about 3000 to 5000 MPa, preferably about 3100 to 4500 MPa, and more preferably about 3200 to 4000 MPa according to ASTM D790.
- thermoplastic resin composition (or a molded product thereof) is excellent in flame retardancy even when thin-walled, and when a test piece having a thickness of 0.8 mm is subjected to a vertical combustion test based on UL94,
- the total of the second and second ignition times may be 15 seconds or less, preferably 12 seconds or less, more preferably 10 seconds or less (for example, 8 seconds or less).
- thermoplastic resin composition is excellent in non-metallic corrosiveness, and can effectively prevent corrosion of resin processing equipment (injection molding machine, its mold, extruder, etc.).
- thermoplastic resin composition is not particularly limited as long as the thermoplastic fluororesin (B) can be dispersed in the thermoplastic resin (A) in the form of fine particles.
- the thermoplastic resin composition can be usually prepared by melt-kneading each component. More specifically, each component is premixed by a mixer (a tumbler, a V-type blender, a Henschel mixer, a Nauta mixer, a ribbon mixer, a mechanochemical device, an extrusion mixer, etc.) as necessary, and then various melt kneaders. In many cases, it is melt-kneaded with a kneader, a single-screw or twin-screw extruder, or the like.
- a mixer a tumbler, a V-type blender, a Henschel mixer, a Nauta mixer, a ribbon mixer, a mechanochemical device, an extrusion mixer, etc.
- melt-kneading it is possible to form a dispersed phase in which the thermoplastic fluororesin (B) is dispersed in a particulate form with a predetermined average particle diameter in the thermoplastic resin (A).
- the melt kneading temperature may be at least the melting point of the thermoplastic resin (A) and the thermoplastic fluororesin (B), and may be, for example, about 300 to 450 ° C., preferably about 350 to 400 ° C.
- the stirring speed (rotational speed) may be, for example, about 150 to 500 rpm, preferably about 200 to 400 rpm (for example, 250 to 350 rpm).
- the melt-kneaded product may be pelletized by a conventional pelletizing means (such as a pelletizer).
- the molded body of the present invention is not particularly limited as long as it is formed of the thermoplastic resin composition, and the shape of the molded body may be a two-dimensional shape such as a film shape or a sheet shape, for example, a rod shape. It may be a three-dimensional shape such as a pipe shape or a plate shape.
- the thin molded body typically, a molded body (thin sheet or the like) having a thin portion with a thickness of 1.5 mm or less, preferably 1.4 mm or less, more preferably 1 mm or less (for example, about 0.1 to 1 mm). ) And the like.
- the thickness of the thin portion may be about 0.3 to 1.3 mm, preferably about 0.5 to 1.2 mm, more preferably about 0.7 to 1 mm.
- the molded body is formed by a conventional method, for example, extrusion molding, injection molding, press molding, or the like.
- the cylinder temperature can be selected from a range equivalent to the melt kneading temperature.
- the mold temperature may be, for example, about 80 to 250 ° C., preferably 90 to 220 ° C., and more preferably about 100 to 200 ° C.
- molding cycle can be shortened.
- the raw material of the flame-retardant resin composition of a comparative example and an Example and the evaluation method of each physical property are as follows.
- the flexural modulus was measured according to ASTM D790.
- a press sheet formed of the resin composition of the comparative example or the example is fixed to a sample holder of an ultramicrotome (manufactured by Leica, ULTRACUT S), the inside of the chamber is cooled to ⁇ 80 ° C. with liquid nitrogen, and a 90 nm thick thin sheet is obtained. Sections were cut out. The obtained thin slice was collected with a platinum ring to which a 20% ethanol solution was attached, and attached to a copper sheet mesh (200A manufactured by Oken Shoji Co., Ltd.).
- Metal corrosion test Prepare two sets of laminates of stainless steel (SUS316) metal discs ( ⁇ 50 mm, thickness 2 mm) at the center of the petri dish, and face these laminates so that the metal discs are inside, A test specimen was prepared by sandwiching a 1 cm 3 pellet formed of the resin composition of the comparative example or the example between two metal disks. This specimen was heated in an oven at 390 ° C. for 42 hours, and metal corrosion was evaluated according to the following criteria.
- the resin composition was pelletized with a pelletizer to produce a pellet.
- the said resin composition was pressed on conditions of 380 degreeC and 5 MPa with the hot press machine, and produced the press sheet of thickness 1.4mm.
- the resin composition was injection molded to produce an injection molded product having a thickness of 0.8 mm. The results are shown in Tables 3-5.
- thermoplastic resin composition of the present invention and its molded product have high flame retardancy even when thin-walled, and can be suitably used as components for home appliances, office automation (OA) devices, mobile devices and the like. Further, since the thermoplastic resin composition and the molded product thereof according to the present invention are thin, they have a high flexural modulus and are difficult to break. Therefore, smartphones, personal computers (notebooks, tablets, etc.), electronic book readers, digital cameras It can be suitably used as a thin switch. Furthermore, the thermoplastic resin composition of the present invention and the molded product thereof can be suitably used as a packing (such as a packing used in the field of weak electricity) or a binding band (such as a binding band used in an airplane).
- a packing such as a packing used in the field of weak electricity
- binding band such as a binding band used in an airplane.
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Abstract
Description
[-Ar-O-Ar-C(=O)-Ar-C(=O)-] (a2)
[-Ar-O-Ar-O-Ar-C(=O)-] (a3)
[式中、Arは2価の芳香族炭化水素環基(フェニレン基、ビフェニレン基など)を表す]
熱可塑性フッ素樹脂(B)は、ラジカル重合性パーフルオロ系単量体の共重合体、例えば、テトラフルオロエチレンとヘキサフルオロプロピレン及びパーフルオロ(C1-3アルキルビニルエーテル)から選択された少なくとも一種との共重合体であってもよい。温度390℃、剪断速度60s-1において、熱可塑性樹脂(A)と熱可塑性フッ素樹脂(B)との溶融粘度比は、前者/後者=0.3/1~6/1であってもよい。
熱可塑性樹脂(A)は、アリーレン基とエーテル基[-O-]とカルボニル基[-C(=O)-]とで構成された繰り返し単位を含んでいる限り特に制限されず、例えば、下記式(a1)~(a5)のいずれかで表される繰り返し単位を含んでいる。
[-Ar-O-Ar-C(=O)-] (a1)
[-Ar-O-Ar-C(=O)-Ar-C(=O)-] (a2)
[ -Ar-O-Ar-O-Ar-C(=O)-] (a3)
[-Ar-O-Ar-C(=O)-Ar-O-Ar-C(=O)-Ar-C(=O)-] (a4)
[-Ar-O-Ar-O-Ar-C(=O)-Ar-C(=O)-] (a5)
(式中、Arは置換基を有していてもよい2価の芳香族炭化水素環基を表す)
Arで表される2価の芳香族炭化水素環基としては、例えば、フェニレン基(o-、m-又はp-フェニレン基など)、ナフチレン基などのC6-10アリーレン基、ビフェニレン基(2,2’-ビフェニレン基、3,3’-ビフェニレン基、4,4’-ビフェニレン基など)などのビC6-10アリーレン基、o-、m-又はp-ターフェニレン基などのターC6-10アリーレン基などが例示できる。これらの芳香族炭化水素環基は、置換基、例えば、ハロゲン原子、アルキル基(メチル基などの直鎖状又は分岐鎖状C1-4アルキル基など)、ハロアルキル基、ヒドロキシル基、アルコキシ基(メトキシ基などの直鎖状又は分岐鎖状C1-4アルコキシ基など)、メルカプト基、アルキルチオ基、カルボキシル基、スルホ基、アミノ基、N-置換アミノ基、シアノ基などを有していてもよい。なお、繰り返し単位(a1)~(a5)において、各Arの種類は、互いに同一であってもよく、異なっていてもよい。
熱可塑性フッ素樹脂(B)は、通常、火種及び融液の落下(ドリップ)を抑制するために用いられるが、本発明では、意外にも前記熱可塑性樹脂(A)との組み合わせにおいて少量で難燃性を大きく向上させる機能を有する。
熱可塑性樹脂組成物は、相分離構造を有しており、連続相を構成する熱可塑性樹脂(A)中に、分散相を構成する熱可塑性フッ素樹脂(B)が粒子状に分散している。分散相は、等方形状であってもよく、異方形状であってもよい。
PEEK:ダイセル・エボニック(株)製、ベスタキープ-J ZV7403、ポリエーテルエーテルケトン
FEP:テトラフルオロエチレン-ヘキサフルオロプロピレン系共重合体(組成重量比;テトラフルオロエチレン/ヘキサフルオロプロピレン/パーフルオロ(プロピルビニルエーテル)=87.5/11.5/1.0、MFR;27g/10分)
PFA:テトラフルオロエチレン-パーフルオロアルキルビニルエーテル系共重合体(組成重量比;テトラフルオロエチレン/パーフルオロ(プロピルビニルエーテル)=94.5/5.5、MFR;23g/10分)
[曲げ弾性率]
曲げ弾性率は、ASTM D790に準じて測定した。
比較例又は実施例の樹脂組成物で形成したプレスシートを、ウルトラミクロトーム(ライカ社製、ULTRACUT S)の試料ホルダーに固定し、チャンバー内を液体窒素で-80℃に冷却し、厚み90nmの薄切片を切り出した。得られた薄切片を、20%エタノール溶液を付着させた白金リングにて回収し、銅製シートメッシュ(応研商事社製、200A)に付着させた。透過型電子顕微鏡(日立製作所社製、H7100FA)を用いて、銅製シートメッシュに付着した薄切片を観察してネガフィルムを作製し、このネガフィルムをスキャナー(EPSON社製、GT-9400UF)にて電子画像化し、光学解析装置(ニレコ社製、LUZEX AP)を用いて電子像の二値化処理を行い、分散相の平均粒径を算出した。
比較例又は実施例の樹脂組成物で形成した射出成形品を用いて、UL94Vに準じて測定した。
シャーレの中央部にステンレス(SUS316)製の金属円板(φ50mm、厚み2mm)を積層した積層体を2組用意し、これらの積層体を、金属円板が内側になるように対向させて、2枚の金属円板の間に、比較例又は実施例の樹脂組成物で形成した1cm3のペレットを挟んで試験体を作製した。この試験体を、オーブン内にて390℃、42時間加熱し、金属の腐食を以下の基準により評価した。
3…ペレットを置いた部分が一部変色しているものの、凹凸は生成していない
2…ペレットを置いた部分が一部変色し、凹凸が生成している
1…ペレットを置いた部分が全て変色し、凹凸が生成している。
垂直燃焼試験用の試験片(0.8mm厚)について成形を行い、金型を開いて突き出しピンによってイジェクトした時に、試験片が移動側又は稼動側に残った場合を離型不良、残らずイジェクトできた場合を離型良として、10回の成形のうちの離型不良の回数により金型離型性を評価した。
JSW社製 TEX44αIIを用いて、PEEKとFEP又はPEEKとPFAを表3~5に示す割合(重量比)でドライブレンドした後、表1~2に示す条件で溶融混練し、樹脂組成物を調製した。この樹脂組成物をペレタイザーによりペレット化し、ペレットを作製した。また、前記樹脂組成物を熱プレス機により380℃及び5MPaの条件下でプレスし、厚み1.4mmのプレスシートを作製した。さらに、前記樹脂組成物を射出成形し、厚み0.8mmの射出成形品を作製した。結果を表3~5に示す。
Claims (11)
- 厚み1.5mm以下の薄肉部を有する薄肉成形体を形成するための難燃性熱可塑性樹脂組成物であって、
アリーレン基とエーテル基とカルボニル基とで構成された繰り返し単位を含む熱可塑性樹脂(A)と、熱可塑性フッ素樹脂(B)とを含んでおり、
熱可塑性樹脂(A)と熱可塑性フッ素樹脂(B)との重量割合が、前者/後者=80/20~99/1であり、
熱可塑性フッ素樹脂(B)が熱可塑性樹脂(A)中に粒子状に分散し、分散相を形成しており、分散相の平均粒子径が3μm以下である難燃性熱可塑性樹脂組成物。 - 熱可塑性樹脂(A)と熱可塑性フッ素樹脂(B)との重量割合が、前者/後者=95/5~99/1である請求項1記載の難燃性熱可塑性樹脂組成物。
- 熱可塑性樹脂(A)と熱可塑性フッ素樹脂(B)との重量割合が、前者/後者=96/4~98/2である請求項1又は2記載の難燃性熱可塑性樹脂組成物。
- 熱可塑性フッ素樹脂(B)の分散相の平均粒子径が0.6μm以下である請求項1~3のいずれかに記載の難燃性熱可塑性樹脂組成物。
- 熱可塑性樹脂(A)が、下記式(a1)~(a3)のいずれかで表される繰り返し単位を含む熱可塑性樹脂である請求項1~4のいずれかに記載の難燃性熱可塑性樹脂組成物。
[-Ar-O-Ar-C(=O)-] (a1)
[-Ar-O-Ar-C(=O)-Ar-C(=O)-](a2)
[-Ar-O-Ar-O-Ar-C(=O)-] (a3)
(式中、Arは2価の芳香族炭化水素環基を表す) - 熱可塑性フッ素樹脂(B)が、ラジカル重合性パーフルオロ系単量体の共重合体である請求項1~5のいずれかに記載の難燃性熱可塑性樹脂組成物。
- 熱可塑性フッ素樹脂(B)が、テトラフルオロエチレンと、ヘキサフルオロプロピレン及びパーフルオロ(C1-3アルキルビニルエーテル)から選択された少なくとも一種との共重合体である請求項1~6のいずれかに記載の難燃性熱可塑性樹脂組成物。
- 温度390℃、剪断速度60s-1において、熱可塑性樹脂(A)と熱可塑性フッ素樹脂(B)との溶融粘度比が、前者/後者=0.3/1~6/1である請求項1~7のいずれかに記載の難燃性熱可塑性樹脂組成物。
- 厚み0.8mmの試験片を、UL94に準拠した垂直燃焼試験に供したとき、一回目及び二回目の着火時間の合計が10秒以下である請求項1~8のいずれかに記載の難燃性熱可塑性樹脂組成物。
- 請求項1~9のいずれかに記載の難燃性熱可塑性樹脂組成物で形成された薄肉成形体。
- 請求項1~9のいずれかに記載の難燃性熱可塑性樹脂組成物を溶融混練して、熱可塑性樹脂(A)中に熱可塑性フッ素樹脂(B)を平均粒子径が3μm以下の粒子状に分散させ、厚み1.5mm以下の薄肉部を有する薄肉成形体を成形することにより、この薄肉成形体の難燃性を向上させる方法。
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WO2022181849A1 (ja) * | 2021-02-26 | 2022-09-01 | ダイキン工業株式会社 | 含フッ素共重合体 |
WO2022181842A1 (ja) * | 2021-02-26 | 2022-09-01 | ダイキン工業株式会社 | 含フッ素共重合体 |
JP2022132233A (ja) * | 2021-02-26 | 2022-09-07 | ダイキン工業株式会社 | 含フッ素共重合体 |
JP2022132226A (ja) * | 2021-02-26 | 2022-09-07 | ダイキン工業株式会社 | 含フッ素共重合体 |
JP7177378B2 (ja) | 2021-02-26 | 2022-11-24 | ダイキン工業株式会社 | 含フッ素共重合体 |
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Also Published As
Publication number | Publication date |
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TW201418364A (zh) | 2014-05-16 |
US20150259525A1 (en) | 2015-09-17 |
KR101777930B1 (ko) | 2017-09-12 |
US9382414B2 (en) | 2016-07-05 |
JP6059233B2 (ja) | 2017-01-11 |
KR20150052126A (ko) | 2015-05-13 |
CN104603202B (zh) | 2017-10-27 |
TWI576392B (zh) | 2017-04-01 |
EP2891683B1 (en) | 2020-05-20 |
EP2891683A4 (en) | 2015-12-30 |
EP2891683A1 (en) | 2015-07-08 |
JPWO2014034493A1 (ja) | 2016-08-08 |
CN104603202A (zh) | 2015-05-06 |
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