WO2025005080A1 - 樹脂組成物および成形体 - Google Patents
樹脂組成物および成形体 Download PDFInfo
- Publication number
- WO2025005080A1 WO2025005080A1 PCT/JP2024/022970 JP2024022970W WO2025005080A1 WO 2025005080 A1 WO2025005080 A1 WO 2025005080A1 JP 2024022970 W JP2024022970 W JP 2024022970W WO 2025005080 A1 WO2025005080 A1 WO 2025005080A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin composition
- group
- fluororesin
- units
- units based
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
- C08K7/06—Elements
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
Definitions
- the present invention relates to a resin composition and a molded article.
- Fluoropolymers have excellent heat resistance, flame retardancy, chemical resistance, weather resistance, non-stickiness, low friction, low dielectric properties, etc., and are therefore used in a wide range of applications, such as corrosion-resistant piping materials in chemical plants, materials for agricultural vinyl greenhouses, release coating materials for kitchen utensils, and coating materials for electric wires.
- fluoropolymers can be inferior to general engineering plastics in mechanical properties such as tensile strength and bending strength (Patent Document 1).
- Patent Document 1 proposes the following resin composition that is excellent in mechanical properties and can give highly elastic molded articles.
- a resin composition comprising one or more melt-moldable fluororesin and inorganic fibers, wherein the fluororesin accounts for 60 to 95 mass% of the total of the fluororesin and the inorganic fibers (100 mass%), the inorganic fibers account for 5 to 40 mass% of the total of the fluororesin and the inorganic fibers (100 mass%), the inorganic fibers have a sizing agent adhered to at least a portion of a surface of the inorganic fibers, and the inorganic fibers have a mass loss rate of 3% or less as calculated by a specific method.
- the present invention provides a resin composition with excellent moldability that can produce molded articles with excellent mechanical properties and surface smoothness, and a molded article with excellent mechanical properties and surface smoothness.
- a composite material comprising a melt-moldable fluororesin and a polyacrylonitrile-based carbon fiber,
- the carbon atom content of the polyacrylonitrile carbon fiber is 90% by mass or more and less than 99% by mass
- the polyacrylonitrile carbon fibers have an average fiber length of 1 mm or less
- a resin composition, wherein a mass ratio of the fluororesin to the polyacrylonitrile-based carbon fiber is 60/40 to 95/5.
- the fluororesin has units based on a fluorine-containing monomer,
- CF 2 CFOR f1 ...(1)
- CH2 CX1 ( CF2 ) pX2 ...
- R f1 is a perfluoroalkyl group having 1 to 10 carbon atoms which may have an etheric oxygen atom between carbon atoms
- X 1 is a hydrogen atom or a fluorine atom
- p is an integer of 2 to 10
- X 2 is a hydrogen atom or a fluorine atom.
- R f2 is a perfluoroalkylene group having 1 to 10 carbon atoms which may have an etheric oxygen atom between the carbon atoms
- X 3 is a halogen atom or a hydroxyl group
- R f3 is a perfluoroalkylene group having 1 to 10 carbon atoms which may have an etheric oxygen atom between the carbon atoms
- X 4 is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms
- q is 1 or 2.
- R f1 is a perfluoroalkyl group having 1 to 10 carbon atoms which may have an etheric oxygen atom between carbon atoms
- X 1 is a hydrogen atom or a fluorine atom
- p is an integer of 2 to 10
- X 2 is a hydrogen atom or a fluorine atom.
- the resin composition of the present invention has excellent moldability and can give molded articles having excellent mechanical properties and surface smoothness.
- the molded article of the present invention is excellent in mechanical properties and surface smoothness.
- a compound represented by formula (n) is referred to as "compound (n)," where n is a natural number.
- “Monomer” means a compound that has a polymerizable carbon-carbon double bond.
- unit based on a monomer is a general term for an atomic group formed directly by polymerization of one monomer molecule and an atomic group obtained by chemically converting a part of the atomic group.
- a unit based on a monomer is also simply referred to as a “monomer unit.”
- melt-formable it is meant that the material exhibits melt flowability.
- Exhibiting melt fluidity means that there exists a temperature at which the melt flow rate is 0.1 to 1000 g/10 min under a load of 49 N at a temperature at least 20° C. higher than the melting point of the resin.
- etheric oxygen atom refers to an oxygen atom which forms an ether bond (-O-) between carbon atoms.
- Melting point is the temperature corresponding to the maximum of the melting peak as measured by differential scanning calorimetry (DSC).
- Melt flow rate is the melt mass flow rate (MFR) as defined in JIS K 7210:1999 (ISO 1133:1997).
- the "carbon atom content”, “average fiber length”, and “average fiber diameter” are determined by the methods described in the examples.
- the resin composition of the present invention contains a melt-moldable fluororesin and polyacrylonitrile carbon fiber (hereinafter also referred to as "PAN-based CF").
- PAN-based CF polyacrylonitrile carbon fiber
- the carbon atom content of the PAN-based CF is 90% by mass or more and less than 99% by mass, and the average fiber length of the PAN-based CF is 1 mm or less.
- the mass ratio of the fluororesin to the PAN-based CF is 60/40 to 95/5.
- the fluororesin is a fluoropolymer having a fluorine-containing monomer unit, and is not particularly limited as long as it can be melt-molded.
- the fluorine-containing monomer is not particularly limited as long as it is a fluorine-containing compound having one polymerizable carbon-carbon double bond.
- Examples of the fluorine-containing monomer include fluoroolefins, fluorine-containing compounds having a ring structure, compound (1) (hereinafter also referred to as "PAVE"), compound (2) (hereinafter also referred to as "FAE”), compound (3), compound (4), and compound (5).
- the fluorine-containing monomer is not limited to these examples.
- two or more kinds of fluorine-containing monomers may be used in combination.
- R f1 is a perfluoroalkyl group having 1 to 10 carbon atoms which may have an etheric oxygen atom between the carbon atoms.
- X 1 is a hydrogen atom or a fluorine atom
- p is an integer of 2 to 10
- X 2 is a hydrogen atom or a fluorine atom.
- R f2 is a perfluoroalkylene group having 1 to 10 carbon atoms which may have an etheric oxygen atom between the carbon atoms
- X 3 is a halogen atom or a hydroxyl group.
- R f3 is a perfluoroalkylene group having 1 to 10 carbon atoms which may have an etheric oxygen atom between the carbon atoms
- X 4 is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.
- q is 1 or 2.
- fluorine-containing compounds having a ring structure examples include perfluoro(2,2-dimethyl-1,3-dioxole), 2,2,4-trifluoro-5-trifluoromethoxy-1,3-dioxole, and perfluoro(2-methylene-4-methyl-1,3-dioxolane).
- fluoroolefin, PAVE, and FAE are preferred as fluorine-containing monomers, with fluoroolefin and PAVE being more preferred.
- fluoroolefins examples include tetrafluoroethylene (hereinafter also referred to as "TFE”), vinyl fluoride, vinylidene fluoride (hereinafter also referred to as “VdF”), trifluoroethylene, chlorotrifluoroethylene (hereinafter also referred to as "CTFE”), hexafluoropropylene (hereinafter also referred to as "HFP”), and hexafluoroisobutylene.
- TFE and HFP are preferred from the standpoint of moldability and mechanical properties, with TFE being more preferred.
- CF2 CFOCF2CF2CF3 (hereinafter also referred to as " PPVE ") is preferred from the standpoint of mechanical properties.
- the FAE is preferably the compound (2-1).
- CH 2 CH(CF 2 ) p1 X 2 ...(2-1)
- p1 is an integer of 2 to 6, and preferably an integer of 2 to 4
- X2 is a hydrogen atom or a fluorine atom.
- PFEE CH 2 ⁇ CH(CF 2 ) 3 F
- PFBE CH 2 ⁇ CF(CF 2 ) 3 H
- CH 2 ⁇ CF(CF 2 ) 4 H are preferred, and PFBE and PFEE are more preferred.
- the fluororesin may further have a non-fluorine monomer unit in addition to the fluorine-containing monomer unit.
- the non-fluorine monomer is not particularly limited as long as it is a monomer that does not have a fluorine atom.
- Examples of the non-fluorine monomer include olefins such as ethylene, propylene, and 1-butene, vinyl esters such as vinyl acetate, and monomers having a functional group f described below.
- the fluororesin has a non-fluorine monomer unit, two or more kinds of non-fluorine monomers may be used in combination.
- the non-fluorine monomer ethylene, propylene and 1-butene are preferable, and ethylene is particularly preferable, from the viewpoint of excellent mechanical properties of a molded article.
- the fluororesin may be a homopolymer having a fluorine-containing monomer unit, or a copolymer having two or more kinds of fluorine-containing monomer units, or a copolymer having one or more kinds of fluorine-containing monomer units and one or more kinds of non-fluorine monomer units.
- the resin composition may contain two or more of these homopolymers or copolymers as the fluororesin.
- the proportion of the fluorine-containing monomer units is preferably 40.0 to 99.5 mol %, more preferably 45 to 99 mol %, of the total of the fluorine-containing monomer units and non-fluorine-containing monomer units. If the proportion of the fluorine-containing monomer units is equal to or greater than the lower limit of the aforementioned numerical range, the flame retardancy, chemical resistance, and moldability of the fluororesin are improved. If the proportion of the fluorine-containing monomer units is equal to or less than the upper limit of the aforementioned numerical range, the mechanical properties are improved.
- fluororesins that are homopolymers include polyvinylidene fluoride, polychlorotrifluoroethylene, and polyhexafluoropropylene.
- fluororesin that is a copolymer include a copolymer having TFE units and ethylene units, a copolymer having CTFE units and ethylene units, a copolymer having TFE units and HFP units, a copolymer having TFE units and PAVE units, and a copolymer having TFE units, FAE units and ethylene units.
- copolymers having TFE units and ethylene units from the viewpoints of mechanical properties and high elasticity, copolymers having TFE units and ethylene units, copolymers having TFE units, FAE units and ethylene units, and copolymers having TFE units and PAVE units are preferred.
- the fluororesin is not limited to these examples as long as it is melt-moldable, and various other homopolymers and copolymers may also be used.
- the TFE units When the fluororesin is a copolymer having TFE units and ethylene units, the TFE units preferably account for 30 to 70 mol %, more preferably 40 to 60 mol %, of the total monomer units of the copolymer.
- the proportions of TFE units are preferably 40 to 64 mol%, FAE units are preferably 1 to 5 mol%, and ethylene units are preferably 35 to 59 mol%, and more preferably 45 to 59 mol%, TFE units are preferably 1 to 4 mol%, and ethylene units are preferably 40 to 54 mol%, based on all monomer units of the copolymer.
- the fluororesin is a copolymer having TFE units and PAVE units
- the content of TFE units is preferably 80.0 to 99.5 mol %, more preferably 90 to 95 mol %, based on the total monomer units of the copolymer.
- the melting point of the fluororesin is preferably 160 to 350°C, more preferably 200 to 320°C, and even more preferably 220 to 280°C. If the melting point of the fluororesin is equal to or higher than the lower limit of the above numerical range, the heat resistance is improved. If the melting point of the fluororesin is equal to or lower than the upper limit of the above numerical range, general-purpose equipment can be used to manufacture the molded product. In addition, molded products with excellent mechanical properties are easily obtained.
- the melt flow rate of the fluororesin is preferably 0.1 to 100 g/10 min, more preferably 0.5 to 80 g/10 min, and even more preferably 1 to 50 g/10 min. If the melt flow rate is equal to or higher than the lower limit of the above numerical range, the fluororesin has excellent moldability. If the melt flow rate is equal to or lower than the upper limit of the above numerical range, a molded product with excellent mechanical properties is easily obtained.
- the fluororesin may be a fluororesin (hereinafter referred to as "fluororesin A") having at least one functional group (hereinafter referred to as "functional group f") selected from the group consisting of a carbonyl group-containing group, a hydroxy group, an epoxy group, an amide group, an amino group, and an isocyanate group.
- the fluororesin A may have two or more functional groups f.
- the resin composition may contain the fluororesin A and a fluororesin that does not have the functional group f.
- the fluororesin A has an adhesive functional group f, the adhesiveness to the PAN-based CF can be improved.
- the functional group f is preferably present in at least one of a terminal group of the main chain of the fluororesin A and a pendant group of the main chain.
- the fluororesin A preferably has at least a carbonyl group-containing group as the functional group f.
- the carbonyl group-containing group include a group having a carbonyl group between the carbon atoms of a hydrocarbon group, a carbonate group, a carboxy group, a haloformyl group, an alkoxycarbonyl group, and an acid anhydride group.
- the hydrocarbon group in the group having a carbonyl group between the carbon atoms of the hydrocarbon group is, for example, an alkylene group having 2 to 8 carbon atoms.
- the number of carbon atoms in the alkylene group does not include the carbon that constitutes the carbonyl group.
- the alkylene group may be linear or branched.
- halogen atoms in haloformyl groups include fluorine and chlorine atoms. Of these, fluorine atoms are preferred.
- the preferred haloformyl group is a fluoroformyl group (also known as a carbonyl fluoride group).
- the alkoxy group in the alkoxycarbonyl group may be linear or branched.
- the alkoxy group in the alkoxycarbonyl group is preferably an alkoxy group having 1 to 8 carbon atoms, with methoxy and ethoxy groups being particularly preferred.
- the content of functional group f in fluororesin A is preferably 10 to 60,000, more preferably 100 to 50,000, still more preferably 100 to 10,000, and particularly preferably 300 to 5,000, per 1 ⁇ 106 main chain carbon atoms of fluororesin A.
- the adhesiveness to PAN-based CF is further improved.
- the adhesiveness to PAN-based CF is improved even if the temperature during melt molding is lowered.
- the content of functional group f can be measured by methods such as nuclear magnetic resonance (NMR) analysis and infrared absorption spectrum analysis.
- NMR nuclear magnetic resonance
- the proportion (mol %) of units having functional group f among all units constituting fluororesin A can be determined using methods such as infrared absorption spectrum analysis, and the content of functional group f can be calculated from the proportion (mol %) of units.
- Fluororesin A1 a fluorine-containing polymer having a functional group f derived from at least one selected from the group consisting of a monomer, a chain transfer agent and a polymerization initiator used in producing the polymer (hereinafter also referred to as "fluorine-containing polymer A1").
- Fluororesin A2 A fluororesin in which a functional group f has been introduced into a fluororesin having no functional group f by surface treatment such as corona discharge treatment or plasma treatment.
- Fluororesin A3 A fluororesin obtained by graft polymerizing a monomer having a functional group f onto a fluororesin not having a functional group f.
- the fluoropolymer A1 is preferred for the following reasons.
- the functional group f is present in at least one of the terminal group of the main chain and the pendant group of the main chain of the fluorine-containing polymer A1
- the adhesion to PAN-based CF is further improved.
- the functional group f in the fluororesin A2 is unstable since it is formed by the surface treatment, and is likely to disappear over time.
- the fluoropolymer A1 can be produced by the following method (1).
- the functional group f is present in a monomer unit formed by polymerization of the monomer during the production.
- Method (1) When the fluorine-containing polymer A1 is produced by polymerization of a fluorine-containing monomer, a monomer having a functional group f is copolymerized.
- the fluoropolymer A1 can be produced by the following method (2).
- the functional group f is present as a terminal group of the main chain of the fluoropolymer A1.
- Method (2) A fluorine-containing polymer A1 is produced by polymerizing a fluorine-containing monomer in the presence of a chain transfer agent having a functional group f.
- chain transfer agents having functional group f include acetic acid, acetic anhydride, methyl acetate, ethylene glycol, and propylene glycol.
- the fluoropolymer A1 can be produced by the following method (3).
- the functional group f is present as a terminal group of the main chain of the fluoropolymer A1.
- Method (3) A fluorine-containing polymer A1 is produced by polymerizing a fluorine-containing monomer in the presence of a polymerization initiator such as a radical polymerization initiator having a functional group f.
- radical polymerization initiators having functional group f include di-n-propyl peroxydicarbonate, diisopropyl peroxycarbonate, tert-butyl peroxyisopropyl carbonate, bis(4-tert-butylcyclohexyl) peroxydicarbonate, and di-2-ethylhexyl peroxydicarbonate.
- the fluoropolymer A1 can be produced by combining two or more of the above methods (1) to (3).
- a fluoropolymer A1 having a functional group f derived from a monomer produced by method (1) is preferred, since the content of the functional group f is easily controlled and the adhesiveness to the PAN-based CF is easily adjusted.
- monomers having a functional group f monomers having a carboxy group, monomers having an acid anhydride group, monomers having a hydroxyl group, and monomers having an epoxy group are preferred. Furthermore, as monomers having a functional group f, non-fluorine monomers are preferred.
- Examples of monomers having a carboxy group include maleic acid, itaconic acid, citraconic acid, and undecylenic acid.
- Examples of monomers having an acid anhydride group include itaconic anhydride (hereinafter also referred to as "IAH"), citraconic anhydride (hereinafter also referred to as "CAH”), 5-norbornene-2,3-dicarboxylic anhydride (hereinafter also referred to as "NAH”), and maleic anhydride.
- An example of the monomer having a hydroxyl group is hydroxybutyl vinyl ether.
- An example of the monomer having an epoxy group is glycidyl vinyl ether.
- the monomer having the functional group f is not limited to these examples. In addition, two or more types of monomers having the functional group f may be used in combination.
- Fluorine-containing polymer A11 A fluorine-containing copolymer having units based on TFE or CTFE (hereinafter also referred to as "units u1"), units based on a cyclic hydrocarbon monomer having an acid anhydride group (hereinafter also referred to as “acid anhydride group-containing cyclic hydrocarbon monomer”) (hereinafter also referred to as "units u2”), and units based on a fluorine-containing monomer (excluding TFE and CTFE) (hereinafter also referred to as "units u3").
- the acid anhydride group of the unit u2 corresponds to the functional group f.
- Examples of the acid anhydride group-containing cyclic hydrocarbon monomer constituting unit u2 include IAH, CAH, NAH, and maleic anhydride. Two or more types of acid anhydride group-containing cyclic hydrocarbon monomers may be used in combination.
- the acid anhydride group-containing cyclic hydrocarbon monomer IAH, CAH and NAH are preferred.
- IAH, CAH or NAH the fluorine-containing copolymer A11 having an acid anhydride group can be easily produced without using a special polymerization method (see JP-A-11-193312) which is required when maleic anhydride is used.
- IAH and NAH are preferred from the viewpoint of further improving the adhesiveness to PAN-based CF.
- fluorine-containing monomer constituting the unit u3 examples include fluoroolefins (excluding TFE and CTFE), fluorine-containing compounds having a ring structure, PAVE, FAE, compound (3), compound (4), and compound (5).
- fluorine-containing monomer constituting the unit u3 fluoroolefin, fluorine-containing compound having a ring structure, PAVE, FAE, compound (3), compound (4), and compound (5)
- the same compounds as those exemplified above as the fluorine-containing monomer constituting the fluororesin can be mentioned.
- the preferred embodiments are also the same.
- PAVE and FAE are preferred from the viewpoints of mechanical properties, high elasticity and moldability.
- the preferred ratio of each unit in the fluorine-containing polymer A11 is as follows.
- the proportion of the units u1 is preferably from 90 to 99.89 mol %, more preferably from 95 to 99.47 mol %, and even more preferably from 96 to 98.95 mol %, based on the total of the units u1, u2, and u3.
- the proportion of the units u2 is preferably from 0.01 to 3 mol %, more preferably from 0.03 to 2 mol %, and even more preferably from 0.05 to 1 mol %, based on the total of the units u1, u2, and u3.
- the proportion of the units u3 is preferably from 0.1 to 9.99 mol %, more preferably from 0.5 to 9.97 mol %, and even more preferably from 1 to 9.95 mol %, based on the total of the units u1, u2, and u3.
- the fluorine-containing polymer A11 may further have, in addition to the units u1 to u3, a unit based on a non-fluorine monomer (excluding an acid anhydride group-containing cyclic hydrocarbon monomer) (hereinafter also referred to as "unit u4").
- unit u4 is an ethylene unit
- the preferred ratio of each unit is as follows.
- the proportion of the units u1 is preferably from 25 to 80 mol %, more preferably from 40 to 65 mol %, and even more preferably from 45 to 63 mol %, based on the total of the units u1, u2, u3 and u4.
- the proportion of the unit u2 is preferably from 0.01 to 5 mol %, more preferably from 0.03 to 3 mol %, and even more preferably from 0.05 to 1 mol %, based on the total of the unit u1, the unit u2, the unit u3 and the unit u4.
- the proportion of the unit u3 is preferably from 0.2 to 20 mol %, more preferably from 0.5 to 15 mol %, and even more preferably from 1 to 12 mol %, based on the total of the units u1, u2, u3 and u4.
- the proportion of units u4, ie, ethylene units, is preferably 20 to 75 mol %, more preferably 35 to 50 mol %, and even more preferably 37 to 55 mol %, based on the total of units u1, u2, u3 and u4.
- the proportion of the unit u1 is within the above range, the flame retardancy, chemical resistance, etc. of the molded article are further improved.
- the ratio of the unit u2 is within the above range, the amount of acid anhydride groups becomes appropriate, and the adhesiveness to PAN-based CF is further improved.
- the ratio of the unit u3 is within the above range, the moldability is further improved.
- the proportion of each unit can be calculated by melt NMR analysis, fluorine content analysis, infrared absorption spectrum analysis, etc. of the fluoropolymer A11.
- the fluoropolymer A11 may contain units based on a dicarboxylic acid (itaconic acid, citraconic acid, 5-norbornene-2,3-dicarboxylic acid, maleic acid, etc.) corresponding to the acid anhydride group-containing cyclic hydrocarbon monomer as a result of partial hydrolysis of the acid anhydride group in unit u2.
- a dicarboxylic acid itaconic acid, citraconic acid, 5-norbornene-2,3-dicarboxylic acid, maleic acid, etc.
- the proportion of units based on a dicarboxylic acid corresponding to the acid anhydride group-containing cyclic hydrocarbon monomer is included in the proportion of unit u2.
- fluorine-containing polymer A11 examples include copolymers having TFE units, NAH units and PPVE units, copolymers having TFE units, IAH units and PPVE units, copolymers having TFE units, CAH units and PPVE units, copolymers having TFE units, IAH units and HFP units, copolymers having TFE units, CAH units and HFP units, copolymers having TFE units, IAH units, PFBE units and ethylene units, copolymers having TFE units, CAH units, PFBE units and ethylene units, copolymers having TFE units, IAH units, PFEE units and ethylene units, copolymers having TFE units, CAH units, PFEE units and ethylene units, and copolymers having TFE units, IAH units, HFP units, PFBE units and ethylene units.
- the fluororesin can be produced by a conventional method.
- the fluororesin can be produced by polymerization of a monomer component containing at least a fluorine-containing monomer.
- the monomer component may further contain a non-fluorine monomer and a monomer having a functional group f, as necessary.
- the polymerization method include bulk polymerization, solution polymerization using an organic solvent (hydrocarbon fluoride, hydrocarbon chloride, fluorochlorohydrocarbon, alcohol, hydrocarbon, etc.), suspension polymerization using an aqueous medium and, if necessary, an appropriate organic solvent, and emulsion polymerization using an aqueous medium and an emulsifier. Among these, solution polymerization is preferred.
- PAN-based CF The carbon atom content of PAN-based CF is 90% by mass or more and less than 99% by mass.
- Another type of carbon fiber is PITCH-based carbon fiber, but in the case of PITCH-based carbon fiber, if the carbon atom content is 90% by mass or more and less than 99% by mass, the mechanical properties are insufficient. In the case of PAN-based CF, the mechanical properties are good even if the carbon atom content is 90% by mass or more and less than 99% by mass.
- the carbon atom content of the PAN-based CF is not particularly limited, but is preferably 90 to 98 mass%, more preferably 93 to 98 mass%, even more preferably 94 to 97 mass%, and particularly preferably 95 to 96 mass%. If the carbon atom content of the PAN-based CF is equal to or higher than the lower limit of the above numerical range, the strength of the PAN-based CF is likely to be improved. If the carbon atom content of the PAN-based CF is equal to or lower than the upper limit of the above numerical range, a molded product with excellent mechanical properties is likely to be obtained.
- the average fiber length of the PAN-based CF is 1 mm or less.
- the average fiber length of the PAN-based CF is preferably 0.8 mm or less, more preferably 0.4 mm or less, and even more preferably 0.15 mm or less. If the average fiber length of the PAN-based CF is equal to or less than the upper limit, a molded product having excellent surface smoothness is easily obtained.
- the lower limit of the average fiber length of the PAN-based CF is not particularly limited, but may be, for example, 0.01 mm, 0.02 mm, 0.05 mm, or the like.
- the average fiber diameter of the PAN-based CF is not particularly limited, but may be, for example, 1 to 20 ⁇ m, 2 to 15 ⁇ m, 4 to 10 ⁇ m, etc. If the average fiber diameter of the PAN-based CF is equal to or greater than the lower limit of the above numerical range, a molded product with excellent mechanical properties is likely to be obtained. If the average fiber diameter of the PAN-based CF is equal to or less than the upper limit of the above numerical range, dispersibility is improved.
- the aspect ratio of the fiber length to the diameter of the PAN-based CF is not particularly limited.
- the aspect ratio is preferably 2 to 1500, more preferably 5 to 1200, and even more preferably 10 to 100. If the aspect ratio is equal to or greater than the lower limit of the above-mentioned numerical range, a molded product with excellent mechanical properties is likely to be obtained. If the aspect ratio is equal to or less than the upper limit of the above-mentioned numerical range, the dispersibility of the PAN-based CF is likely to be improved.
- the cross-sectional shape of the PAN-based CF is not particularly limited.
- the cross-section of the PAN-based CF may be circular, elliptical, polygonal, or irregular.
- the cross-sectional shape of the PAN-based CF can be appropriately selected depending on the desired physical properties.
- the resin composition may further contain other components in addition to the fluororesin and PAN-based CF within a range that does not impair the effects of the invention.
- other components include inorganic fibers (excluding PAN-based CF), inorganic fillers, metal soaps, surfactants, UV absorbers, lubricants, and silane coupling agents.
- the other components are not limited to these examples.
- inorganic fibers include glass fibers, silicon carbide fibers, silicon nitride fibers, alumina fibers, silicon carbide fibers, boron fibers, and metal fibers.
- metal fibers include aluminum fibers, brass fibers, and stainless steel fibers.
- the mass ratio of the fluororesin to the PAN-based CF is 60/40 to 95/5. Since the mass ratio is equal to or greater than the lower limit of the numerical range, the molding processability of the resin composition is improved. Furthermore, the surface smoothness of the molded article is improved. Since the mass ratio is equal to or less than the upper limit of the numerical range, the mechanical properties of the molded article are improved.
- the mass ratio is preferably 65/35 to 90/10, more preferably 70/30 to 90/10, and even more preferably 70/30 to 85/15.
- the proportion of the fluororesin is preferably 50 to 95 mass% of the total amount of the resin composition, more preferably 60 to 90 mass%, and even more preferably 70 to 85 mass%. If the proportion of the fluororesin is equal to or greater than the lower limit of the above numerical range, the moldability of the resin composition is likely to be improved. In addition, the surface smoothness of the molded article is likely to be improved. If the proportion of the fluororesin is equal to or less than the upper limit of the above numerical range, the mechanical properties of the molded article are likely to be improved.
- the proportion of PAN-based CF is preferably 1 to 40 mass% of the total amount of the resin composition, more preferably 10 to 35 mass%, and even more preferably 15 to 30 mass%. If the proportion of PAN-based CF is equal to or greater than the lower limit of the above numerical range, the mechanical properties of the molded article tend to improve. If the proportion of PAN-based CF is equal to or less than the upper limit of the above numerical range, the moldability of the resin composition tends to improve. In addition, the surface smoothness of the molded article tends to improve.
- the total proportion of the fluororesin and PAN-based CF is preferably 50 to 100 mass% of the total amount of the resin composition, more preferably 60 to 95 mass%, even more preferably 70 to 90 mass%, and may be 100 mass%. If the total proportion of the fluororesin and PAN-based CF is equal to or greater than the lower limit of the above numerical range, the molding processability of the resin composition is likely to be improved. In addition, molded articles with excellent mechanical properties and surface smoothness are likely to be obtained. If the total proportion of the fluororesin and PAN-based CF is equal to or less than the upper limit of the above numerical range, when the resin composition further contains other components, it is easy to impart the properties of the other components.
- the resin composition of the present invention further contains other components, if the proportion of the other components is 1 mass% or more of the total amount of the resin composition, the properties of the other components are easily imparted.
- the proportion of the other components to the resin composition is preferably 10 mass% or less, more preferably 5 mass% or less, and even more preferably 3 mass% or less. If the proportion of the other components is equal to or less than the upper limit, the moldability of the resin composition is easily improved. In addition, a molded product having excellent mechanical properties and surface smoothness is easily obtained.
- the melt flow rate of the resin composition at a temperature of 297° C. and a load of 49 N is preferably 2.5 g/10 min or more, more preferably 3 g/10 min or more, and even more preferably 4 g/10 min or more. If the melt flow rate of the resin composition is equal to or higher than the lower limit, a molded product having excellent surface smoothness is easily obtained. In addition, moldability is easily improved.
- the upper limit of the melt flow rate of the resin composition is not particularly limited, but may be 300 g/10 min, 100 g/10 min, etc. If the melt flow rate of the resin composition is equal to or lower than the upper limit, a molded product having excellent mechanical properties is easily obtained.
- s calculated by the following formula (6) is preferably 4.0 or more and less than 6.0, more preferably 4.3 to 5.8, and even more preferably 4.5 to 5.5. If s is equal to or more than the lower limit of the above numerical range, a molded product with excellent mechanical properties is likely to be obtained. If s is equal to or less than the upper limit of the above numerical range, the effect of improving mechanical properties is likely to be obtained with a smaller amount of PAN-based CF. Therefore, a molded product with excellent mechanical properties and surface smoothness is likely to be obtained.
- t is the bending strength (MPa) of an injection-molded article of the resin composition having a thickness of 4 mm
- u is the percentage of PAN-based CF in the total of the fluororesin and PAN-based CF in the resin composition. The content is (%).
- the resin composition can be produced by melt-kneading the fluororesin, the PAN-based CF, and other components as necessary.
- the resin composition containing the molten fluororesin and the PAN-based CF may be extruded into a strand shape, and the strand may be cut with a pelletizer to form pellets.
- the melt kneading device is not particularly limited.
- the melt kneading device may be equipped with a screw having a high kneading effect.
- a single screw extruder or a twin screw extruder is preferred, a twin screw extruder is more preferred, and a twin screw extruder equipped with a screw having a high kneading effect is particularly preferred.
- a screw having a high kneading effect a screw that exerts a sufficient kneading effect and does not apply excessive shear force can be selected.
- melt kneading device examples include a Labo Plastomill Kneader (manufactured by Toyo Seiki Seisakusho Co., Ltd.) and a KZW Series Twin Screw Kneading Extruder (manufactured by Technovel Co., Ltd.).
- PAN-based CF may be added before melt-kneading the fluororesin, or may be added after melt-kneading the fluororesin. However, from the viewpoint of mechanical properties, it is preferable to add PAN-based CF after melt-kneading the fluororesin.
- the other components may be added before melt-kneading the fluororesin, or the other components may be added after melt-kneading the fluororesin.
- the temperature at which the fluororesin is melted and kneaded is equal to or higher than the melting point of the fluororesin, and is preferably from 5° C. to 100° C. above the melting point of the fluororesin.
- the extrusion shear rate when melt-kneading the fluororesin and the residence time of the fluororesin in the melt-kneading device are not particularly limited, and conditions can be appropriately adopted according to the desired application, etc.
- the extrusion shear rate is preferably set according to the melt viscosity of the fluororesin at the melt-kneading temperature.
- the carbon atom content of the PAN-based CF is 90% by mass or more and less than 99% by mass, and the mass ratio of the fluororesin to the PAN-based CF is 95/5 or less, which improves the mechanical properties of the molded article.
- the average fiber length of the PAN-based CF is 1 mm or less, and the mass ratio of the fluororesin to the PAN-based CF is 60/40 or more, which improves the moldability of the resin composition and the surface smoothness of the molded product. Therefore, the resin composition has excellent moldability, and a molded article having excellent mechanical properties and surface smoothness can be obtained.
- the resin composition can be used, for example, as a raw material for a molded article.
- the molded article molded from the resin composition of the present invention has excellent mechanical properties and surface smoothness, and is therefore preferably used in applications requiring these properties.
- the bending strength of the molded body is preferably 50 MPa or more, more preferably 65 MPa or more, and even more preferably 80 MPa or more. If the bending strength of the molded body is equal to or greater than the lower limit, the mechanical properties are further improved.
- the upper limit of the bending strength of the molded body is not particularly limited, but may be, for example, 120 MPa.
- the surface roughness of the molded body is preferably 10 ⁇ m or less, more preferably 5 ⁇ m or less, and even more preferably 2 ⁇ m or less. If the surface roughness of the molded body is equal to or less than the upper limit, the surface smoothness is further improved.
- the lower limit of the surface roughness of the molded body is not particularly limited, but may be, for example, 0.1 ⁇ m.
- Examples of applications of the molded article include housings for portable electronic devices, connecting members for portable electronic devices, sliding members, three-dimensional circuit components, gears, actuators, pistons, bearings, aircraft interior materials, bushes, tubes (for fuel, etc.), hoses, tanks, seals, wires, insulating coating materials for electric wires (wires, cables, etc.), films, sheets, bottles, and fibers.
- portable electronic devices are used by hand, and therefore are prone to adhesion of liquids such as oils contained in food and cosmetics, beverages, sweat, and sebum.
- the molded article of the present invention is resistant to discoloration and deterioration due to these adhesions, and is therefore suitable for use as housings and connecting members for portable electronic devices.
- Portable electronic devices include, for example, mobile phones, personal digital assistants, laptop computers, tablet computers, radios, cameras, camera accessories, watches, calculators, music players, global positioning system receivers, portable games, hard drives, portable recording devices, portable playback devices, and portable radio receivers.
- Examples of the form of the housing of the portable electronic device include the back cover, front cover, antenna housing, frame, and backbone of the portable electronic device.
- the housing may be a member consisting of the single component of the molded article of the present invention or a member consisting of multiple components.
- the backbone is the member to which the components of the portable electronic device, such as electronics, microprocessor, screen, keyboard, keypad, antenna, battery socket, etc., are attached.
- the housing When the housing is inside the portable electronic device, the housing may not be visible from the outside of the portable electronic device, or may be partially visible from the outside of the portable electronic device.
- the housing such as a cover for protecting and supporting the internal structure, may be exposed to the outside of the portable electronic device.
- the form of the coupling member for the portable electronic device may be, for example, a snap-on connector between the circuit board, microphone, speaker, display, battery, cover, electrical connector, electronic connector, hinge, antenna, switch, or switch pad of the portable electronic device.
- the coupling member can be suitably applied to portable electronic devices such as mobile phones, personal digital assistants (PDAs), music storage devices, bugging devices, portable DVD players, electric multimeters, portable electronic game consoles, and portable personal computers (e.g., notebook computers, etc.).
- Three-dimensional circuit components are components in which a circuit pattern is formed on the surface of a resin component molded into a three-dimensional shape, and are used as antenna components for portable electronic devices and components for in-vehicle electronic devices.
- the circuit pattern is formed using the laser direct structuring (LDS) method, in which the circuit pattern is etched with a laser and then plated.
- LDS laser direct structuring
- the molded product of the present invention has excellent low dielectric properties and can be suitably used for three-dimensional circuit components.
- tubes, hoses, tanks, seals, and wires include those described in International Publication No. 2015/182702.
- Applications of tubes and hoses include tubes for drilling for energy resources such as oil, natural gas, and shale oil. Of these, tubes for oil mining are preferred.
- Applications of tubes also include medical catheters equipped with tubes, electrical wire coatings, and piping for analytical equipment.
- Applications of the insulating coating material for electric wires include electric wires or rectangular copper wires for motor coils, and in particular, insulating coating materials for rectangular conductors in drive motors for hybrid electric vehicles (HEVs) and electric vehicles (EVs).
- the insulating coating material for rectangular conductors is preferably in the form of a film.
- Applications of the insulating coating material for electric wires include, for example, insulating coating materials for downhole cables used in drilling for energy resources (oil, natural gas, shale oil, etc.). In particular, insulating coating materials for downhole cables used in oil mining are preferred.
- Examples of applications of the film and sheet include speaker diaphragms, plates for trauma and fractures, insulating papers (motor insulating papers, etc.) for various electrical insulating adhesive tapes, sealing tapes for oil and natural gas pipes, and release films for thermosetting and thermoplastic composite molding.
- examples of applications of the film include speaker diaphragms with films, films for covering electric wires, flexible printed circuit boards, heat-resistant rolls for office automation equipment, and films for impregnating other fiber composites.
- the thickness of the film is preferably 1 to 100 ⁇ m, more preferably 2 to 80 ⁇ m, and even more preferably 5 to 50 ⁇ m.
- the thickness of the film is equal to or greater than the lower limit of the above-mentioned numerical range, the strength of the film is improved. If the thickness of the film is equal to or less than the upper limit of the above-mentioned numerical range, the film is excellent in handleability in the next process.
- Applications for the fibers include protective clothing and various filters.
- parts, attachments, and transport parts used in manufacturing equipment include parts, attachments, and transport parts used in manufacturing equipment. These may be extrusion molded products, injection molded products, compression molded products, machined products, and the like. Examples include containers, chemical tanks, wafer cases, screws, bolts, nuts, packing, O-rings, valves, fittings, filters, diaphragms, retainer rings, wire coating, tubes, hoses, joints, piping, joining parts, and duct parts.
- the molded articles are also suitable for use as magnetic pump parts.
- the molded articles are used for impellers, casings, split plates, and gaskets.
- molding methods include injection molding, extrusion molding, co-extrusion molding, blow molding, compression molding, transfer molding, and film molding. However, molding methods are not limited to these examples.
- Examples 1 and 2 are examples, and Examples 3 to 7 are comparative examples.
- the carbon fibers used for length measurement are those located on the diagonal of an observation range of 3000 ⁇ m length ⁇ 5000 ⁇ m width.
- the widths of 100 to 300 carbon fibers in the planar photograph are regarded as diameters and measured, and the average value of these is the average fiber diameter of the carbon fibers.
- the carbon fibers used for measuring the width (diameter) are those located on the diagonal of an observation range of 3000 ⁇ m long x 5000 ⁇ m wide.
- Carbon atom content of carbon fiber Carbon atom content of carbon fiber
- XPS X-ray photoelectron spectroscopy
- melt flow rate of resin composition Using a melt indexer (manufactured by Technoseven Co., Ltd.), the mass of the polymer flowing out from a nozzle having a diameter of 2.095 mm and a length of 8 mm in 10 minutes was measured under conditions of 297° C. and a load of 49 N.
- the resin composition was injection molded using an injection molding machine (ROBOSHOT ⁇ -50C, manufactured by Fanuc Corporation) at a mold temperature of 100° C. and a cylinder temperature of 340° C. to obtain an injection molded article for evaluation having a thickness of 4 mm.
- ROBOSHOT ⁇ -50C manufactured by Fanuc Corporation
- Linear expansion coefficient The linear expansion coefficient of the injection molded article for evaluation was measured using a thermomechanical analyzer (SS6100, manufactured by Hitachi High-Tech Science Corporation). Measurements were carried out in both the MD and TD directions of the injection molding machine used to prepare the injection molded article for evaluation.
- the mold dimension is the length of one side of the mold used to prepare the injection-molded article for evaluation
- the dimension of the injection-molded article for evaluation is the length of one side corresponding to the mold.
- Test piece having a length of 80 mm and a width of 10 mm was cut out from the injection molded article for evaluation.
- the bending strength [MPa] and bending modulus [GPa] of the test piece were measured using TENSILON (A&D, RTF-1350) in accordance with JIS K7171 at a load cell rating of 1 kN, a support distance of 64 mm, and a speed of 2 mm/min.
- Izod impact strength A test piece having a length of 80 mm and a width of 10 mm was cut out from the injection molded article for evaluation. A notch was made at a position 40 mm above the injection molded article for evaluation to obtain the test piece.
- the Izod impact strength [J/m] of the test piece was measured in accordance with ASTM D256 using an Izod tester (manufactured by Toyo Seiki Seisakusho, Ltd.) under conditions of a hammer capacity of 2.75 J and a distance from the axis to the impact point of 33 cm. The measurement was performed at 23°C.
- the tensile strength [MPa], tensile elongation [%], and tensile modulus [MPa] of the injection molded article for evaluation were measured using a TENSILON (manufactured by A&D Co., Ltd., model: RTF-1350) in accordance with JIS K 7161 at a load cell rating of 10 kN, a chuck distance of 115 mm, and a speed of 50 mm/min.
- the tensile modulus was measured in both the MD and TD directions of the injection molding machine used to prepare the injection molded article for evaluation.
- CF3 CF3 was a pitch-based carbon fiber "CF SC-2415" manufactured by Osaka Gas Co., Ltd.
- the average fiber length, average fiber diameter, carbon atom content, and density of CF3 are shown in Table 1.
- CF4 PAN-based carbon fiber "PXCA0250-83" manufactured by ZOLTEK was used as CF4.
- the average fiber length, average fiber diameter, carbon atom content, and density of CF4 are shown in Table 1.
- Fluororesin 1 not having a functional group f was used. Fluororesin 1 had TFE units, ethylene units, and PFBE units, with a molar ratio of TFE units/ethylene units/PFBE units of 54/46/1.4. The melting point of fluororesin 1 was 260° C., and the melt flow rate was 12 g/10 min.
- CF is an abbreviation for carbon fiber
- s is a value calculated by the following formula.
- s t/u
- t is the bending strength (MPa) of the injection-molded article for evaluation
- u is the content (mass%) of carbon fiber in the total of the fluororesin and carbon fiber in the resin composition.
- Example 1 the surface roughness was lower than in Example 7, and molded bodies with excellent surface smoothness were obtained.
- the resin composition of the present invention has excellent moldability and can give molded articles having excellent mechanical properties and surface smoothness.
- the molded article of the present invention is excellent in mechanical properties and surface smoothness.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Description
・1種以上の溶融成形可能なフッ素樹脂と、無機繊維とを含む樹脂組成物であって、前記フッ素樹脂と前記無機繊維との合計100質量%のうち、前記フッ素樹脂の割合が60~95質量%であり、前記フッ素樹脂と前記無機繊維との合計100質量%のうち、前記無機繊維の割合が5~40質量%であり、前記無機繊維は、前記無機繊維の表面の少なくとも一部に付着したサイジング剤を有し、前記無機繊維の特定の方法で算出される質量減少率が、3%以下である、樹脂組成物。
[1]溶融成形可能なフッ素樹脂と、ポリアクリロニトリル系炭素繊維と、を含み、
前記ポリアクリロニトリル系炭素繊維の炭素原子含有率が、90質量%以上99質量%未満であり、
前記ポリアクリロニトリル系炭素繊維の平均繊維長が、1mm以下であり、
前記フッ素樹脂の前記ポリアクリロニトリル系炭素繊維に対する質量比が、60/40~95/5である、樹脂組成物。
[2]前記フッ素樹脂が、含フッ素単量体に基づく単位を有し、
前記含フッ素単量体が、フルオロオレフィン、環構造を有する含フッ素化合物、下式(1)で表される化合物、下式(2)で表される化合物、下式(3)で表される化合物、下式(4)で表される化合物および下式(5)で表される化合物からなる群から選ばれる少なくとも1種である、請求項1に記載の樹脂組成物。
CF2=CFORf1 ・・・(1)
CH2=CX1(CF2)pX2 ・・・(2)
CF2=CFORf2SO2X3 ・・・(3)
CF2=CFORf3CO2X4 ・・・(4)
CF2=CF(CF2)qOCF=CF2 ・・・(5)
式(1)中、Rf1は炭素原子間にエーテル性酸素原子を有してもよい炭素数1~10のペルフルオロアルキル基であり、
式(2)中、X1は水素原子またはフッ素原子であり、pは2~10の整数であり、X2は水素原子またはフッ素原子であり、
式(3)中、Rf2は炭素原子間にエーテル性酸素原子を有してもよい炭素数1~10のペルフルオロアルキレン基であり、X3はハロゲン原子または水酸基であり、
式(4)中、Rf3は炭素原子間にエーテル性酸素原子を有してもよい炭素数1~10のペルフルオロアルキレン基であり、X4は水素原子または炭素数1~3のアルキル基であり、
式(5)中、qは1または2である。
[3]前記フッ素樹脂が、テトラフルオロエチレンに基づく単位とエチレンに基づく単位とを有する共重合体、クロロトリフルオロエチレンに基づく単位とエチレンに基づく単位とを有する共重合体、テトラフルオロエチレンに基づく単位とヘキサフルオロプロピレンに基づく単位とを有する共重合体、テトラフルオロエチレンに基づく単位と下式(1)で表される化合物に基づく単位とを有する共重合体、および、テトラフルオロエチレンに基づく単位と下式(2)で表される化合物に基づく単位とエチレンに基づく単位とを有する共重合体からなる群から選ばれる少なくとも1種である、[1]または[2]に記載の樹脂組成物。
CF2=CFORf1 ・・・(1)
CH2=CX1(CF2)pX2 ・・・(2)
式(1)中、Rf1は炭素原子間にエーテル性酸素原子を有してもよい炭素数1~10のペルフルオロアルキル基であり、
式(2)中、X1は水素原子またはフッ素原子であり、pは2~10の整数であり、X2は水素原子またはフッ素原子である。
[4]前記フッ素樹脂が、テトラフルオロエチレンに基づく単位とエチレンに基づく単位とを有する共重合体、テトラフルオロエチレンに基づく単位と前記式(1)で表される化合物に基づく単位とを有する共重合体、および、テトラフルオロエチレンに基づく単位と前記式(2)で表される化合物に基づく単位とエチレンに基づく単位とを有する共重合体からなる群から選ばれる少なくとも1種である、[3]に記載の樹脂組成物。
[5]前記フッ素樹脂が、カルボニル基含有基、ヒドロキシ基、エポキシ基、アミド基、アミノ基およびイソシアネート基からなる群から選ばれる少なくとも1種の官能基を有する、[1]~[4]のいずれかに記載の樹脂組成物。
[6]前記フッ素樹脂の溶融流れ速度が、0.1~100g/10分である、[1]~[5]のいずれかに記載の樹脂組成物。
[7]前記ポリアクリロニトリル系炭素繊維の炭素原子含有率が、90~98質量%である、[1]~[6]のいずれかに記載の樹脂組成物。
[8]前記ポリアクリロニトリル系炭素繊維の平均繊維径が、1~20μmである、[1]~[7]のいずれかに記載の樹脂組成物。
[9]前記フッ素樹脂の割合が、前記樹脂組成物の総量の50~95質量%である、[1]~[8]のいずれかに記載の樹脂組成物。
[10]前記ポリアクリロニトリル系炭素繊維の割合が、前記樹脂組成物の総量の1~40質量%である、[1]~[9]のいずれかに記載の樹脂組成物。
[11]前記樹脂組成物の温度297℃、荷重49Nにおける溶融流れ速度が、2.5g/10分以上である、[1]~[10]のいずれかに記載の樹脂組成物。
[12]下式で求められるsが、4.0以上6.0未満である、[1]~[11]のいずれかに記載の樹脂組成物。
s=t/u
式中、tは前記樹脂組成物の厚さ4mmの射出成形体の曲げ強度(MPa)であり、uは、前記樹脂組成物中の前記フッ素樹脂および前記ポリアクリロニトリル系炭素繊維の合計に占める前記ポリアクリロニトリル系炭素繊維の含有率(質量%)である。
[13][1]~[12]のいずれかに記載の樹脂組成物を成形して得られた、成形体。
[14]前記成形体の曲げ強度が、50MPa以上である、[13]に記載の成形体。
[15]前記成形体の表面粗度が、10μm以下である、[13]または[14]に記載の成形体。
本発明の成形体は、機械的特性および表面平滑性に優れる。
式(n)で表される化合物を「化合物(n)」と記す。nは自然数である。
「単量体」とは、重合性炭素-炭素二重結合を有する化合物を意味する。
「単量体に基づく単位」は、単量体1分子が重合して直接形成される原子団と、該原子団の一部を化学変換して得られる原子団との総称である。単量体に基づく単位を、単に、「単量体単位」とも記す。
「溶融成形可能」であるとは、溶融流動性を示すことを意味する。
「溶融流動性を示す」とは、荷重49Nの条件下、樹脂の融点よりも20℃以上高い温度において、溶融流れ速度が0.1~1000g/10分となる温度が存在することを意味する。
「エーテル性酸素原子」とは、炭素原子間においてエーテル結合(-O-)を形成する酸素原子を意味する。
「融点」は、示差走査熱量測定(DSC)法で測定した融解ピークの最大値に対応する温度である。
「溶融流れ速度」は、JIS K 7210:1999(ISO 1133:1997)に規定されるメルトマスフローレート(MFR)である。
「炭素原子含有率」、「平均繊維長」、「平均繊維径」は実施例に記載の方法によって求める。
「表面粗度」、「曲げ強度」等は実施例に記載の方法によって求める。
数値範囲を示す「~」は、~の前後に記載された数値を下限値および上限値として含むことを意味する。本明細書に開示の数値範囲の下限値および上限値は任意に組み合わせて新たな数値範囲とすることができる。
本発明の樹脂組成物は、溶融成形可能なフッ素樹脂と、ポリアクリロニトリル系炭素繊維(以下、「PAN系CF」とも記す。)とを含む。PAN系CFの炭素原子含有率は、90質量%以上99質量%未満であり、PAN系CFの平均繊維長は1mm以下である。フッ素樹脂のPAN系CFに対する質量比は、60/40~95/5である。以下、いくつかの実施形態について詳細に説明する。
フッ素樹脂は含フッ素単量体単位を有する含フッ素重合体であり、溶融成形が可能なものであれば特に限定されない。
含フッ素単量体は、重合性炭素-炭素二重結合を1つ有する含フッ素化合物であれば特に限定されない。含フッ素単量体として、例えば、フルオロオレフィン、環構造を有する含フッ素化合物、化合物(1)(以下、「PAVE」とも記す。)、化合物(2)(以下、「FAE」とも記す。)、化合物(3)、化合物(4)、化合物(5)が挙げられる。ただし、含フッ素単量体はこれらの例示に限定されない。また、含フッ素単量体は、2種以上を併用してもよい。
CH2=CX1(CF2)pX2 ・・・(2)
CF2=CFORf2SO2X3 ・・・(3)
CF2=CFORf3CO2X4 ・・・(4)
CF2=CF(CF2)qOCF=CF2 ・・・(5)
式(2)中、X1は水素原子またはフッ素原子であり、pは2~10の整数であり、X2は水素原子またはフッ素原子である。
式(3)中、Rf2は炭素原子間にエーテル性酸素原子を有してもよい炭素数1~10のペルフルオロアルキレン基であり、X3はハロゲン原子または水酸基である。
式(4)中、Rf3は炭素原子間にエーテル性酸素原子を有してもよい炭素数1~10のペルフルオロアルキレン基であり、X4は水素原子または炭素数1~3のアルキル基である。
式(5)中、qは1または2である。
CH2=CH(CF2)p1X2 ・・・(2-1)
式(2-1)中、p1は、2~6であり、2~4が好ましく、X2は水素原子またはフッ素原子である。
フッ素樹脂が非フッ素単量体単位を有する場合、非フッ素単量体は、2種以上を併用してもよい。非フッ素単量体としては、成形体の機械的特性等に優れる点から、エチレン、プロピレン、1-ブテンが好ましく、エチレンが特に好ましい。
樹脂組成物は、フッ素樹脂としてこれら単独重合体や共重合体の2種以上を含んでいてもよい。
共重合体であるフッ素樹脂としては、例えば、TFE単位とエチレン単位とを有する共重合体、CTFE単位とエチレン単位とを有する共重合体、TFE単位とHFP単位とを有する共重合体、TFE単位とPAVE単位とを有する共重合体、TFE単位とFAE単位とエチレン単位とを有する共重合体が挙げられる。
なかでも機械的特性、高弾性の点から、TFE単位とエチレン単位とを有する共重合体、TFE単位とFAE単位とエチレン単位とを有する共重合体、TFE単位とPAVE単位とを有する共重合体が好ましい。
また、フッ素樹脂は溶融成形可能であればこれらの例示に限定されず、その他種々の単独重合体、共重合体であってもよい。
フッ素樹脂がTFE単位とFAE単位とエチレン単位とを有する共重合体である場合、共重合体の全単量体単位に対して、TFE単位が40~64モル%、FAE単位が1~5モル%、エチレン単位が35~59モル%が好ましく、TFE単位が45~59モル%、FAE単位が1~4モル%、エチレン単位が40~54モル%が好ましい。
フッ素樹脂がTFE単位とPAVE単位とを有する共重合体である場合、共重合体の全単量体単位に対して、共重合体の全単量体単位に対して、TFE単位が80.0~99.5モル%が好ましく、90~95モル%がより好ましい。
官能基fは、PAN系CFとの接着性の点から、フッ素樹脂Aの主鎖の末端基および主鎖のペンダント基の少なくとも一方に存在することが好ましい。
カルボニル基含有基としては、例えば、炭化水素基の炭素原子間にカルボニル基を有する基、カーボネート基、カルボキシ基、ハロホルミル基、アルコキシカルボニル基、酸無水物基が挙げられる。
フッ素樹脂A1:重合体の製造の際に用いた単量体、連鎖移動剤および重合開始剤からなる群から選ばれる少なくとも1種に由来する官能基fを有する含フッ素重合体(以下、「含フッ素重合体A1」とも記す。)。
フッ素樹脂A2:コロナ放電処理、プラズマ処理等の表面処理によって官能基fを有しないフッ素樹脂に官能基fを導入したフッ素樹脂。
フッ素樹脂A3:官能基fを有しないフッ素樹脂に、官能基fを有する単量体をグラフト重合して得られたフッ素樹脂。
・含フッ素重合体A1においては、含フッ素重合体A1の主鎖の末端基および主鎖のペンダント基の少なくとも一方に官能基fが存在するため、PAN系CFとの接着性がさらに向上する。
・フッ素樹脂A2における官能基fは、表面処理によって形成されたため不安定であり、時間とともに消失しやすい。
方法(1):含フッ素単量体の重合によって含フッ素重合体A1を製造する際に、官能基fを有する単量体を共重合させる。
方法(2):官能基fを有する連鎖移動剤の存在下に、含フッ素単量体の重合によって含フッ素重合体A1を製造する。
方法(3):官能基fを有するラジカル重合開始剤等の重合開始剤の存在下に、含フッ素単量体の重合によって含フッ素重合体A1を製造する。
酸無水物基を有する単量体としては、例えば、無水イタコン酸(以下、「IAH」とも記す。)、無水シトラコン酸(以下、「CAH」とも記す。)、5-ノルボルネン-2,3-ジカルボン酸無水物(以下、「NAH」とも記す。)、無水マレイン酸が挙げられる。
水酸基を有する単量体としては、例えば、ヒドロキシブチルビニルエーテルが挙げられる。エポキシ基を有する単量体としては、例えば、グリシジルビニルエーテルが挙げられる。
ただし、官能基fを有する単量体はこれらの例示に限定されない。また、官能基fを有する単量体は2種以上を併用してもよい。
含フッ素重合体A11:TFEまたはCTFEに基づく単位(以下、「単位u1」とも記す。)と、酸無水物基を有する環状炭化水素単量体(以下、「酸無水物基含有環状炭化水素単量体」とも記す。)に基づく単位(以下、「単位u2」とも記す。)と、含フッ素単量体(ただし、TFEおよびCTFEを除く。)に基づく単位(以下、「単位u3」とも記す。)とを有する含フッ素共重合体。
ここで、単位u2の有する酸無水物基が官能基fに相当する。
酸無水物基含有環状炭化水素単量体としては、PAN系CFとの接着性がさらに向上する点から、IAH、NAHが好ましい。
単位u3を構成する含フッ素単量体としての、フルオロオレフィン、環構造を有する含フッ素化合物、PAVE、FAE、化合物(3)、化合物(4)、化合物(5)については、フッ素樹脂を構成する含フッ素単量体として上述して例示したものと同じ化合物が挙げられる。好ましい態様も同じである。
単位u3を構成する含フッ素単量体としては、機械的特性、高弾性、成形性の点から、PAVE、FAEが好ましい。
単位u1の割合は、単位u1と単位u2と単位u3との合計に対して、90~99.89モル%が好ましく、95~99.47モル%がより好ましく、96~98.95モル%がさらに好ましい。
単位u2の割合は、単位u1と単位u2と単位u3との合計に対して、0.01~3モル%が好ましく、0.03~2モル%がより好ましく、0.05~1モル%がさらに好ましい。
単位u3の割合は、単位u1と単位u2と単位u3との合計に対して、0.1~9.99モル%が好ましく、0.5~9.97モル%がより好ましく、1~9.95モル%がさらに好ましい。
単位u4がエチレン単位である場合の各単位の好ましい割合は下記の通りである。
単位u1の割合は、単位u1と単位u2と単位u3と単位u4との合計に対して、25~80モル%が好ましく、40~65モル%がより好ましく、45~63モル%がさらに好ましい。
単位u2の割合は、単位u1と単位u2と単位u3と単位u4との合計に対して、0.01~5モル%が好ましく、0.03~3モル%がより好ましく、0.05~1モル%がさらに好ましい。
単位u3の割合は、単位u1と単位u2と単位u3と単位u4との合計に対して、0.2~20モル%が好ましく、0.5~15モル%がより好ましく、1~12モル%がさらに好ましい。
単位u4、すなわちエチレン単位の割合は、単位u1と単位u2と単位u3と単位u4との合計に対して、20~75モル%が好ましく、35~50モル%がより好ましく、37~55モル%がさらに好ましい。
単位u2の割合が前記数値範囲内であれば、酸無水物基の量が適切になるため、PAN系CFとの接着性がさらに向上する。
単位u3の割合が前記数値範囲内であれば、成形性がさらに向上する。
各単位の割合は、含フッ素重合体A11の溶融NMR分析、フッ素含有量分析、赤外吸収スペクトル分析等により算出できる。
重合方法としては、例えば、塊状重合法、有機溶媒(フッ化炭化水素、塩化炭化水素、フッ化塩化炭化水素、アルコール、炭化水素等)を用いる溶液重合法、水性媒体と必要に応じて適当な有機溶媒とを用いる懸濁重合法、水性媒体と乳化剤とを用いる乳化重合法が挙げられる。なかでも、溶液重合法が好ましい。
PAN系CFの炭素原子含有率は、90質量%以上99質量%未満である。炭素繊維の種類には他にPITCH系炭素繊維があるが、PITCH系炭素繊維の場合、炭素原子含有率が90質量%以上99質量%未満であると機械的特性が不充分となる。PAN系CFであれば、炭素原子含有率が90質量%以上99質量%未満であっても機械的特性が良好となる。
PAN系CFの平均繊維長の下限値は特に限定されるものではないが、例えば、0.01mm、0.02mm、0.05mm等であってよい。
樹脂組成物は発明の効果を損なわない範囲内であれば、フッ素樹脂およびPAN系CF以外の他の成分をさらに含んでもよい。他の成分としては、例えば、無機繊維(ただし、PAN系CFを除く。)、無機フィラー、金属せっけん、界面活性剤、紫外線吸収剤、潤滑剤、シランカップリング剤が挙げられる。ただし、他の成分はこれらの例示に限定されない。
フッ素樹脂のPAN系CFに対する質量比(フッ素樹脂/PAN系CF)は60/40~95/5である。該質量比が前記数値範囲の下限値以上であるため、樹脂組成物の成形加工性が向上する。また、成形体の表面平滑性が向上する。該質量比が前記数値範囲の前記数値範囲の上限値以下であるため、成形体の機械的特性が向上する。該質量比は65/35~90/10が好ましく、70/30~90/10がより好ましく、70/30~85/15がさらに好ましい。
樹脂組成物の温度297℃、荷重49Nにおける溶融流れ速度は2.5g/10分以上が好ましく、3g/10分以上がより好ましく、4g/10分以上がさらに好ましい。樹脂組成物の溶融流れ速度が前記下限値以上であれば、表面平滑性に優れる成形体が得られやすい。また、成形加工性が向上しやすい。樹脂組成物の溶融流れ速度の上限値は特に限定されるものではないが、300g/10分、100g/10分等であってよい。樹脂組成物の溶融流れ速度が前記上限値以下であれば、機械的特性に優れる成形体が得られやすい。
式(6)中、tは樹脂組成物の厚さ4mmの射出成形体の曲げ強度(MPa)であり、uは、樹脂組成物中のフッ素樹脂およびPAN系CFの合計に占めるPAN系CFの含有率(%)である。
樹脂組成物は、フッ素樹脂とPAN系CFと必要に応じて他の成分とを溶融混練して製造できる。溶融したフッ素樹脂とPAN系CFとを含む樹脂組成物をストランド状に押し出し、ストランドをペレタイザで切断してペレット化してもよい。
混練効果の高いスクリューとしては、充分な混練効果を発揮し、かつ過剰なせん断力を与えないものを選択できる。溶融混練装置としては、ラボプラストミル混練機(東洋精機製作所社製)、KZWシリーズ 二軸混練押出機(テクノベル社製)が挙げられる。
他の成分を樹脂組成物に含ませる場合、フッ素樹脂を溶融混練する前に他の成分を添加してもよく、フッ素樹脂を溶融混練した後に他の成分を添加してもよい。
フッ素樹脂を溶融混練する際の押出せん断速度、溶融混練装置内でのフッ素樹脂の滞留時間は特に限定されず、所望の用途等に応じて条件を適宜採用できる。押出せん断速度は、溶融混練温度におけるフッ素樹脂の溶融粘度に応じて設定することが好ましい。
以上説明した樹脂組成物は、PAN系CFの炭素原子含有率が90質量%以上99質量%未満であり、かつ、フッ素樹脂のPAN系CFに対する質量比が95/5以下である。そのため、成形体の機械的特性がよくなる。
加えて、PAN系CFの平均繊維長は1mm以下であり、かつ、フッ素樹脂のPAN系CFに対する質量比が60/40以上である。そのため、樹脂組成物の成形加工性がよくなり、また、成形体の表面平滑性もよくなる。
よって、樹脂組成物は成形加工性に優れる。また、機械的特性および表面平滑性に優れる成形体が得られる。
樹脂組成物は、例えば、成形体の原料として使用できる。本発明の樹脂組成物を成形した成形体は機械的特性に優れ、表面平滑性にも優れるため、これらの特性が要求される用途に用いられることが好ましい。
携帯電子装置としては、例えば、携帯電話、携帯端末、ラップトップコンピュータ、タブレットコンピュータ、ラジオ、カメラ、カメラ付属品、時計、計算機、音楽プレーヤー、全地球測位システム受信機、携帯ゲーム、ハードドライブ、携帯記録装置、携帯再生装置、携帯ラジオ受信機が挙げられる。
筐体が携帯電子装置の内部にある場合、筐体が、携帯電子装置の外部から視認可能でない場合と、携帯電子装置の外部から部分的に視認可能である場合がある。内部構造の保護および支持のためのカバー等の筐体は、携帯電子装置の外部に露出していてもよい。
繊維の用途としては、防護服、各種フィルターが挙げられる。
(フッ素樹脂の融点)
示差走査熱量計(DSC装置、セイコーインスツル社製)を用い、重合体を10℃/分の速度で昇温したときの融解ピークを記録し、極大値に対応する温度を融点とした。
メルトインデクサー(テクノセブン社製)を用い、297℃、荷重49Nの条件下で直径2mm、長さ8mmのノズルから10分間に流出する重合体の質量を測定した。
光学顕微鏡で取得した倍率50倍の平面写真において、100~300本の炭素繊維の長さを測定し、それらを平均した値を炭素繊維の平均繊維長とする。長さの測定に供する炭素繊維としては、縦3000μm×横5000μmの観察範囲の対角線上に位置する炭素繊維を用いる。
光学顕微鏡で取得した倍率50倍の平面写真において、平面写真の100~300本の炭素繊維の幅を直径とみなして測定し、それらを平均した値を炭素繊維の平均繊維径とする。幅(直径)の測定に供する炭素繊維としては、縦3000μm×横5000μmの観察範囲の対角線上に位置する炭素繊維を用いる。
炭素繊維のX線光電分光法(XPS)による表面組成を炭素原子含有率とする。
JIS R 7603に準拠した方法にて算出した値を炭素繊維の密度とする。
メルトインデクサー(テクノセブン社製)を用い、297℃、荷重49Nの条件下で直径2.095mm、長さ8mmのノズルから10分間に流出する重合体の質量を測定した。
射出成形機(ファナック社製、ROBOSHOT α-50C)を用い、金型温度100℃、シリンダー温度340℃にて樹脂組成物を射出成形し、厚さ4mmの評価用射出成形体を得た。
評価用射出成形体から長さ80mm、幅10mmの試験片を切り出した。試験片について、表面粗さ測定器(株式会社東京精密製「サーフコムNEX100」)を用いて表面粗度(Ra)測定を行った。測定長は4mmとした。
評価用射出成形体について熱機械分析装置(日立ハイテクサイエンス社製、SS6100)を用い、線膨張係数を測定した。
評価用射出成形体の作製に使用した射出成形機のMD方向およびTD方向についてそれぞれ測定した。
評価用射出成形体について、以下の式より収縮率(%)を算出した。評価用射出成形体の作製に使用した射出成形機のMD方向およびTD方向についてそれぞれ測定した。
収縮率(%)=((金型寸法-評価用射出成形体寸法)/(金型寸法))×100
式中、金型寸法は評価用射出成形体の作製に使用した金型の一辺の長さであり、評価用射出成形体寸法は、該金型に対応する一辺の長さである。
評価用射出成形体から長さ80mm、幅10mmの試験片を切り出した。試験片について、TENSILON(エー・アンド・デイ、RTF-1350)を用い、JIS K7171に準じて、ロードセル定格1kN、支点間距離64mm、速度2mm/分で、曲げ強度[MPa]、曲げ弾性率[GPa]を測定した。
評価用射出成形体から長さ80mm、幅10mmの試験片を切り出した。評価用射出成形体の高さ40mmの位置にノッチを入れ、試験片を得た。
試験片について、アイゾット試験装置(東洋精機製作所社製)を用い、ハンマー容量2.75J、軸心から打撃点までの距離33cmの条件にて、ASTM D256に準じてアイゾット衝撃強度[J/m]を測定した。測定は23℃にて実施した。
評価用射出成形体についてTENSILON(エー・アンド・デイ社製、型式:RTF-1350)を用い、JIS K7161に準じて、ロードセル定格10kN、チャック間距離115mm、速度50mm/分で、引張強度[MPa]、引張伸度[%]、引張弾性率[MPa]を測定した。引張弾性率については、評価用射出成形体の作製に使用した射出成形機のMD方向およびTD方向についてそれぞれ測定した。
(CF1)
ZOLTEK社製のPAN系炭素繊維「CF PX30MF0150」をCF1として用いた。CF1の平均繊維長、平均繊維径、炭素原子含有率、密度は表1に示した。
ZOLTEK社製のPAN系炭素繊維「CF PX35MF0150」をCF2として用いた。CF2の平均繊維長、平均繊維径、炭素原子含有率、密度は表1に示した。
大阪ガス株式会社製のPITCH系炭素繊維「CF SC-2415」をCF3として用いた。CF3の平均繊維長、平均繊維径、炭素原子含有率、密度は表1に示した。
ZOLTEK社製のPAN系炭素繊維「PXCA0250-83」をCF4として用いた。CF4の平均繊維長、平均繊維径、炭素原子含有率、密度は表1に示した。
官能基fを有しないフッ素樹脂1を用いた。フッ素樹脂1はTFE単位とエチレン単位とPFBE単位を有し、TFE単位/エチレン単位/PFBE単位=54/46/1.4(モル比)であった。フッ素樹脂1の融点は260℃であり、溶融流れ速度は12g/10分であった。
表1に示す組成となるように二軸押出機(テクノベル社製、KZW15TW-45MG-NH(-1100)、スクリュー径:15mmΦ、L/D:45)のスクリューの基端にフィーダーを用いてフッ素樹脂を投入し、サイドフィーダーを用いて二軸押出機バレルの途中から炭素繊維を投入し、フィード量3kg/時、スクリュー回転数200rpm、シリンダー、ダイおよびヘッドの設定温度:C1=285℃、C2=285℃、C3=285℃、C4=285℃、C5=285℃、C6=285℃、D=290℃の条件で混錬し、ダイ先端から押し出されたストランドをベルトコンベアにて引取り、空冷した後、ペレタイザにてカットし、樹脂組成物のペレットを得た。その後、評価用射出成形体をそれぞれ得た。各例の測定結果を表1に示す。
s=t/u
式中、tは評価用射出成形体の曲げ強度(MPa)であり、uは、樹脂組成物中のフッ素樹脂および炭素繊維の合計に占める炭素繊維の含有率(質量%)である。
本発明の成形体は、機械的特性および表面平滑性に優れる。
Claims (15)
- 溶融成形可能なフッ素樹脂と、ポリアクリロニトリル系炭素繊維と、を含み、
前記ポリアクリロニトリル系炭素繊維の炭素原子含有率が、90質量%以上99質量%未満であり、
前記ポリアクリロニトリル系炭素繊維の平均繊維長が、1mm以下であり、
前記フッ素樹脂の前記ポリアクリロニトリル系炭素繊維に対する質量比が、60/40~95/5である、樹脂組成物。 - 前記フッ素樹脂が、含フッ素単量体に基づく単位を有し、
前記含フッ素単量体が、フルオロオレフィン、環構造を有する含フッ素化合物、下式(1)で表される化合物、下式(2)で表される化合物、下式(3)で表される化合物、下式(4)で表される化合物および下式(5)で表される化合物からなる群から選ばれる少なくとも1種である、請求項1に記載の樹脂組成物。
CF2=CFORf1 ・・・(1)
CH2=CX1(CF2)pX2 ・・・(2)
CF2=CFORf2SO2X3 ・・・(3)
CF2=CFORf3CO2X4 ・・・(4)
CF2=CF(CF2)qOCF=CF2 ・・・(5)
式(1)中、Rf1は炭素原子間にエーテル性酸素原子を有してもよい炭素数1~10のペルフルオロアルキル基であり、
式(2)中、X1は水素原子またはフッ素原子であり、pは2~10の整数であり、X2は水素原子またはフッ素原子であり、
式(3)中、Rf2は炭素原子間にエーテル性酸素原子を有してもよい炭素数1~10のペルフルオロアルキレン基であり、X3はハロゲン原子または水酸基であり、
式(4)中、Rf3は炭素原子間にエーテル性酸素原子を有してもよい炭素数1~10のペルフルオロアルキレン基であり、X4は水素原子または炭素数1~3のアルキル基であり、
式(5)中、qは1または2である。 - 前記フッ素樹脂が、テトラフルオロエチレンに基づく単位とエチレンに基づく単位とを有する共重合体、クロロトリフルオロエチレンに基づく単位とエチレンに基づく単位とを有する共重合体、テトラフルオロエチレンに基づく単位とヘキサフルオロプロピレンに基づく単位とを有する共重合体、テトラフルオロエチレンに基づく単位と下式(1)で表される化合物に基づく単位とを有する共重合体、および、テトラフルオロエチレンに基づく単位と下式(2)で表される化合物に基づく単位とエチレンに基づく単位とを有する共重合体からなる群から選ばれる少なくとも1種である、請求項1に記載の樹脂組成物。
CF2=CFORf1 ・・・(1)
CH2=CX1(CF2)pX2 ・・・(2)
式(1)中、Rf1は炭素原子間にエーテル性酸素原子を有してもよい炭素数1~10のペルフルオロアルキル基であり、
式(2)中、X1は水素原子またはフッ素原子であり、pは2~10の整数であり、X2は水素原子またはフッ素原子である。 - 前記フッ素樹脂が、テトラフルオロエチレンに基づく単位とエチレンに基づく単位とを有する共重合体、テトラフルオロエチレンに基づく単位と前記式(1)で表される化合物に基づく単位とを有する共重合体、および、テトラフルオロエチレンに基づく単位と前記式(2)で表される化合物に基づく単位とエチレンに基づく単位とを有する共重合体からなる群から選ばれる少なくとも1種である、請求項3に記載の樹脂組成物。
- 前記フッ素樹脂が、カルボニル基含有基、ヒドロキシ基、エポキシ基、アミド基、アミノ基およびイソシアネート基からなる群から選ばれる少なくとも1種の官能基を有する、請求項1に記載の樹脂組成物。
- 前記フッ素樹脂の溶融流れ速度が、0.1~100g/10分である、請求項1に記載の樹脂組成物。
- 前記ポリアクリロニトリル系炭素繊維の炭素原子含有率が、90~98質量%である、請求項1に記載の樹脂組成物。
- 前記ポリアクリロニトリル系炭素繊維の平均繊維径が、1~20μmである、請求項1に記載の樹脂組成物。
- 前記フッ素樹脂の割合が、前記樹脂組成物の総量の50~95質量%である、請求項1に記載の樹脂組成物。
- 前記ポリアクリロニトリル系炭素繊維の割合が、前記樹脂組成物の総量の1~40質量%である、請求項1に記載の樹脂組成物。
- 前記樹脂組成物の温度297℃、荷重49Nにおける溶融流れ速度が、2.5g/10分以上である、請求項1に記載の樹脂組成物。
- 下式で求められるsが、4.0以上6.0未満である、請求項1に記載の樹脂組成物。
s=t/u
式中、tは前記樹脂組成物の厚さ4mmの射出成形体の曲げ強度(MPa)であり、uは、前記樹脂組成物中の前記フッ素樹脂および前記ポリアクリロニトリル系炭素繊維の合計に占める前記ポリアクリロニトリル系炭素繊維の含有率(質量%)である。 - 請求項1~12のいずれか一項に記載の樹脂組成物を成形して得られた、成形体。
- 前記成形体の曲げ強度が、50MPa以上である、請求項13に記載の成形体。
- 前記成形体の表面粗度が、10μm以下である、請求項13に記載の成形体。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112024002060.7T DE112024002060T5 (de) | 2023-06-29 | 2024-06-25 | Harzzusammensetzung und formprodukt |
| JP2025530136A JPWO2025005080A1 (ja) | 2023-06-29 | 2024-06-25 | |
| CN202480029619.7A CN121152838A (zh) | 2023-06-29 | 2024-06-25 | 树脂组合物和成形体 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2023-106630 | 2023-06-29 | ||
| JP2023106630 | 2023-06-29 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US19/429,029 Continuation US20260132233A1 (en) | 2023-06-29 | 2025-12-22 | Resin composition and molded product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2025005080A1 true WO2025005080A1 (ja) | 2025-01-02 |
Family
ID=93939065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2024/022970 Ceased WO2025005080A1 (ja) | 2023-06-29 | 2024-06-25 | 樹脂組成物および成形体 |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPWO2025005080A1 (ja) |
| CN (1) | CN121152838A (ja) |
| DE (1) | DE112024002060T5 (ja) |
| WO (1) | WO2025005080A1 (ja) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1171493A (ja) * | 1997-06-30 | 1999-03-16 | Ntn Corp | 耐圧摺動性四フッ化エチレン樹脂組成物 |
| WO2004094528A1 (ja) * | 2003-04-23 | 2004-11-04 | Nok Corporation | ポリテトラフルオロエチレン樹脂組成物 |
| WO2015190597A1 (ja) * | 2014-06-13 | 2015-12-17 | ダイキン工業株式会社 | 水生生物付着防止材 |
| WO2023286801A1 (ja) * | 2021-07-15 | 2023-01-19 | Agc株式会社 | 樹脂組成物、樹脂組成物の製造方法および成形体 |
| JP2023081803A (ja) * | 2021-12-01 | 2023-06-13 | 旭化成株式会社 | ポリアミド組成物及び成形品 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3150645B1 (en) | 2014-05-30 | 2020-03-04 | AGC Inc. | Process for producing a fluorinated polymer |
| JP7525007B2 (ja) | 2022-03-17 | 2024-07-30 | カシオ計算機株式会社 | プログラム、情報処理方法、情報端末及び情報処理システム |
-
2024
- 2024-06-25 CN CN202480029619.7A patent/CN121152838A/zh active Pending
- 2024-06-25 DE DE112024002060.7T patent/DE112024002060T5/de active Pending
- 2024-06-25 WO PCT/JP2024/022970 patent/WO2025005080A1/ja not_active Ceased
- 2024-06-25 JP JP2025530136A patent/JPWO2025005080A1/ja active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1171493A (ja) * | 1997-06-30 | 1999-03-16 | Ntn Corp | 耐圧摺動性四フッ化エチレン樹脂組成物 |
| WO2004094528A1 (ja) * | 2003-04-23 | 2004-11-04 | Nok Corporation | ポリテトラフルオロエチレン樹脂組成物 |
| WO2015190597A1 (ja) * | 2014-06-13 | 2015-12-17 | ダイキン工業株式会社 | 水生生物付着防止材 |
| WO2023286801A1 (ja) * | 2021-07-15 | 2023-01-19 | Agc株式会社 | 樹脂組成物、樹脂組成物の製造方法および成形体 |
| JP2023081803A (ja) * | 2021-12-01 | 2023-06-13 | 旭化成株式会社 | ポリアミド組成物及び成形品 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN121152838A (zh) | 2025-12-16 |
| DE112024002060T5 (de) | 2026-04-09 |
| JPWO2025005080A1 (ja) | 2025-01-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7003434B2 (ja) | 樹脂組成物および成形品 | |
| CN112189034B (zh) | 树脂组合物 | |
| EP2818516B1 (en) | Fluorine-containing copolymer composition, molded article, and electric wire | |
| CN106663498B (zh) | 绝缘电线及其制造方法 | |
| JP6330447B2 (ja) | 含フッ素共重合体組成物、その製造方法および成形品 | |
| CN103732681A (zh) | 含氟共聚物组合物 | |
| JP7193766B2 (ja) | 含フッ素共重合体 | |
| US20240150530A1 (en) | Resin composition, method for producing resin composition and molded body | |
| WO2012070401A1 (ja) | シート状記録材剥離用摺動部材、自動車用シールリング、並びに、産業ガス圧縮機用シールリング及び摺動部材 | |
| JP2022132217A (ja) | 含フッ素共重合体 | |
| JP6206492B2 (ja) | 耐熱電線用被覆材料、その製造方法および電線 | |
| US7060772B2 (en) | Fluoropolymers from tetrafluoroethylene and perfluoro(alkoxyalkyl vinyl) ether | |
| US20240360309A1 (en) | Resin composition, molded body, composite, and use thereof | |
| CN116034026B (zh) | 树脂组合物、成形体、复合体及其用途 | |
| JP6586792B2 (ja) | ポリフェニレンスルフィド組成物および成形品 | |
| JP5365939B2 (ja) | 自動車用シールリング、産業ガス圧縮機用シールリング及び摺動部品 | |
| US20260132233A1 (en) | Resin composition and molded product | |
| CN121152838A (zh) | 树脂组合物和成形体 | |
| EP1328562B1 (en) | Fluoropolymer | |
| WO2024024632A1 (ja) | 樹脂組成物及びその成形体 | |
| CN120202254A (zh) | 树脂组合物、成形体、复合体及其用途 | |
| US20260128190A1 (en) | Rectangular wire and production method for same | |
| JP2023153017A (ja) | 含フッ素共重合体 | |
| HK1212721B (zh) | 机动车用密封圈或者工业气体压缩机用密封圈或滑动构件 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 24831940 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2025530136 Country of ref document: JP Kind code of ref document: A |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2025530136 Country of ref document: JP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 112024002060 Country of ref document: DE |
|
| WWP | Wipo information: published in national office |
Ref document number: 112024002060 Country of ref document: DE |
