WO2018030427A1 - 組成物および成形品 - Google Patents
組成物および成形品 Download PDFInfo
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- WO2018030427A1 WO2018030427A1 PCT/JP2017/028820 JP2017028820W WO2018030427A1 WO 2018030427 A1 WO2018030427 A1 WO 2018030427A1 JP 2017028820 W JP2017028820 W JP 2017028820W WO 2018030427 A1 WO2018030427 A1 WO 2018030427A1
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- 0 **c1cc(Oc(cc2)ccc2N)cc(Oc(cc2)ccc2N)c1 Chemical compound **c1cc(Oc(cc2)ccc2N)cc(Oc(cc2)ccc2N)c1 0.000 description 2
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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
- 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
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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
- 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
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
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- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/38—Polysiloxanes modified by chemical after-treatment
- C08G77/382—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon
- C08G77/388—Polysiloxanes modified by chemical after-treatment containing atoms other than carbon, hydrogen, oxygen or silicon containing nitrogen
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
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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
- 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
- C08L27/16—Homopolymers or copolymers or vinylidene fluoride
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
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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
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
- C08L83/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
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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
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/14—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K3/1006—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by the chemical nature of one of its constituents
- C09K3/1009—Fluorinated polymers, e.g. PTFE
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32458—Vessel
- H01J37/32513—Sealing means, e.g. sealing between different parts of the vessel
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67069—Apparatus for fluid treatment for etching for drying etching
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- 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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
- C08G77/26—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen nitrogen-containing groups
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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
- C08L2312/00—Crosslinking
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0615—Macromolecular organic compounds, e.g. prepolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09K2200/0635—Halogen-containing polymers, e.g. PVC
- C09K2200/0637—Fluoro-containing polymers, e.g. PTFE
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/068—Containing also other elements than carbon, oxygen or nitrogen in the polymer main chain
- C09K2200/0685—Containing silicon
Definitions
- the present invention relates to a composition containing a fluorine-containing polymer and a molded product obtained therefrom.
- Fluorine-containing elastomers especially perfluoroelastomers containing tetrafluoroethylene (TFE) units, exhibit excellent chemical resistance, solvent resistance, and heat resistance, and are therefore used in aerospace, semiconductor manufacturing equipment, chemical plant fields, etc. Widely used as a sealing material in harsh environments.
- TFE tetrafluoroethylene
- Patent Document 1 in order to provide a seal for a semiconductor manufacturing apparatus that has heat resistance, low gas permeability, stability even when irradiated with plasma in an oxygen or CF 4 atmosphere, and the like and does not generate dust, It has been proposed to add 1 to 50 parts by weight of silica and 1 to 10 parts by weight of organic peroxide with respect to 100 parts by weight of elastomer.
- Patent Document 2 in order to improve plasma resistance and reduce generation of particles after plasma irradiation, aluminum oxide fine particles having an average particle diameter of 0.5 ⁇ m or less may be added to the crosslinkable fluorine-based elastomer component. Proposed.
- Patent Document 3 for the purpose of providing a white blended composition of a fluorine-containing elastomer that can be peroxide vulcanized and does not deteriorate compression set, a 4 to 5 wt% aqueous solution is added to the fluorine-containing elastomer. It has been proposed to add ultrafine white carbon having a pH of 9-12.
- Patent Document 4 heat resistance and workability are maintained in an environment where direct exposure to plasma is performed, as in a dry etching apparatus, and both fluorine-based plasma and oxygen plasma that are exposed in a semiconductor manufacturing process.
- an isoindolinone pigment, a quinacridone pigment, a diketopyrrolopyrrole pigment is used as the fluorine-containing elastomer. It has been proposed to add at least one selected from the group consisting of pigments, anthraquinone pigments, amine antioxidants, phenolic antioxidants, sulfur antioxidants, and phosphorus antioxidants.
- Patent Document 5 discloses a filler composed of a synthetic polymer compound having an amide bond or a synthetic polymer compound having an imide bond in the main chain as a filler having a small weight change in both oxygen plasma irradiation and CF 4 plasma irradiation. Are listed. It is also described that this filler is blended with a crosslinkable elastomer.
- the resulting molded product has excellent heat resistance and is further exposed to oxygen in the semiconductor manufacturing process. It has been found that the weight change is small relative to plasma and fluorine-based plasma.
- the present invention is a composition comprising a fluorine-containing polymer and a hyperbranched polymer of a cage silsesquioxane represented by the general formula (1).
- General formula (1) (In general formula (1), R 1 to R 8 are each independently a hydrogen atom, a halogen atom or an organic group, and at least one of R 1 to R 8 is an organic group.)
- the cage-type silsesquioxane hyperbranched polymer preferably has a distribution in molecular weight.
- R 1 to R 8 each independently include a terminal group T represented by the general formula (2).
- General formula (2) wherein X 1 and X 2 are each independently —NH 2 , —OH, —SH, —H, —NH—CO—CF 3 or It is group represented by these. )
- R 1 to R 8 preferably include a divalent group B1 represented by the formula (3-1).
- the fluorine-containing polymer is preferably a fluorine-containing elastomer.
- composition of the present invention preferably contains 0.5 to 100 parts by mass of a cage silsesquioxane hyperbranched polymer with respect to 100 parts by mass of the fluorine-containing polymer.
- composition of the present invention preferably further contains a crosslinking agent.
- composition of the present invention is preferably a molding material.
- the present invention is also a molded article obtained from the above composition.
- the molded product obtained from the composition of the present invention has excellent heat resistance, and further has a weight against oxygen plasma and fluorine-based plasma exposed in the semiconductor manufacturing process. Small change.
- the molded article of the present invention has the above-described configuration, it has excellent heat resistance and further has a small weight change with respect to oxygen plasma and fluorine-based plasma exposed in the semiconductor manufacturing process.
- composition of the present invention includes a hyperbranched polymer of a cage silsesquioxane having a specific structure and a fluorine-containing polymer.
- the fluorine-containing polymer is preferably a fluorine-containing elastomer because of its excellent sealing properties, chemical resistance and heat resistance.
- the fluorine-containing elastomer may be a partially fluorinated elastomer or a perfluoroelastomer, but it is preferable to use a perfluoroelastomer from the viewpoint of further excellent chemical resistance and heat resistance.
- VdF vinylidene fluoride
- TFE tetrafluoroethylene
- Pr tetrafluoroethylene
- TFE propylene
- VdF vinylidene fluoride
- the vinylidene fluoride-based fluororubber is preferably a copolymer composed of 45 to 85 mol% of vinylidene fluoride and 55 to 15 mol% of at least one other monomer copolymerizable with vinylidene fluoride.
- the copolymer is composed of 50 to 80 mol% of vinylidene fluoride and 50 to 20 mol% of at least one other monomer copolymerizable with vinylidene fluoride.
- the content of each monomer constituting the fluoropolymer can be calculated by appropriately combining NMR, FT-IR, elemental analysis, and fluorescent X-ray analysis depending on the type of monomer.
- TFE tetrafluoroethylene
- HFP he
- Monomers monomers ethylene, propylene, and a non-fluorinated monomer such as an alkyl vinyl ether. These can be used alone or in any combination. Among these, it is preferable to use at least one selected from the group consisting of TFE, HFP, fluoroalkyl vinyl ether and CTFE.
- CF 2 CFO (CF 2 CF (Y 11) O) m (CF 2) n F (Wherein Y 11 represents a fluorine atom or a trifluoromethyl group, m is an integer of 1 to 4, and n is an integer of 1 to 4).
- Y 11 represents a fluorine atom or a trifluoromethyl group
- m is an integer of 1 to 4
- n is an integer of 1 to 4
- at least one of The fluoromonomer represented by the general formula (8) is more preferable.
- vinylidene fluoride-based fluorororubber examples include VdF / HFP rubber, VdF / HFP / TFE rubber, VdF / CTFE rubber, VdF / CTFE / TFE rubber, VDF / general formula (6).
- the tetrafluoroethylene / propylene-based fluororubber is preferably a copolymer composed of 45 to 70 mol% of tetrafluoroethylene, 55 to 30 mol% of propylene, and 0 to 5 mol% of a fluoromonomer providing a crosslinking site. .
- the fluorine-containing elastomer may be a perfluoroelastomer.
- the perfluoroelastomer include perfluoroelastomers containing TFE, for example, a fluoromonomer copolymer represented by TFE / general formula (8), (10) or (11), and TFE / general formula (8), (10 ) Or (11) is preferably at least one selected from the group consisting of a fluoromonomer / monomer copolymer that provides a crosslinking site.
- TFE / PMVE copolymer the composition is preferably 45 to 90/10 to 55 (mol%), more preferably 55 to 80/20 to 45, and still more preferably 55 to 70/30 to 45.
- a monomer copolymer that provides a TFE / PMVE / cross-linking site it is preferably 45 to 89.9 / 10 to 54.9 / 0.01 to 4 (mol%), and more preferably 55 to 77. It is 9/20 to 49.9 / 0.1 to 3.5, and more preferably 55 to 69.8 / 30 to 44.8 / 0.2 to 3.
- a fluoromonomer copolymer represented by the general formula (8), (10) or (11) having 4 to 12 carbon atoms preferably 50 to 90/10 to 50 (mol%). More preferably, it is 60 to 88/12 to 40, and still more preferably 65 to 85/15 to 35.
- the composition is out of the range, the properties as a rubber elastic body are lost, and the properties tend to be similar to those of a resin.
- perfluoroelastomer examples include TFE / fluoromonomer represented by the general formula (11) / fluoromonomer copolymer that gives a crosslinking site, TFE / perfluorovinyl ether copolymer represented by the general formula (11), and TFE. / At least one selected from the group consisting of a fluoromonomer copolymer represented by the general formula (8) and a fluoromonomer represented by TFE / the general formula (8) / a monomer copolymer giving a crosslinking site It is preferable that
- perfluoroelastomer examples include perfluoroelastomers described in International Publication No. 97/24381, Japanese Examined Patent Publication No. 61-57324, Japanese Examined Patent Publication No. 4-81608, Japanese Patent Publication No. 5-13961, and the like. Can do.
- the monomer that gives a crosslinking site is a monomer (curing site monomer) having a crosslinkable group that gives the fluoropolymer a crosslinking site for forming a crosslink with a crosslinking agent.
- CX 3 2 CX 3 -R f 121 CHR 121 X 4
- X 3 is a hydrogen atom, a fluorine atom or CH 3
- R f 121 is a fluoroalkylene group, a perfluoroalkylene group, a fluoro (poly) oxyalkylene group or a perfluoro (poly) oxyalkylene group
- R 121 Is a hydrogen atom or CH 3
- X 4 is an iodine atom or a bromine atom
- CX 3 2 CX 3 -R f 131 X 4 (Wherein X 3 is a hydrogen atom, fluorine atom or CH 3 , R f 131 is a fluoroalkylene group, perfluoroalkylene group, fluoropolyoxyalkylene group or perfluoropolyoxyalkylene
- Formula (14) CF 2 ⁇ CFO (CF 2 CF (CF 3 ) O) m (CF 2 ) n —X 5 (Wherein m is an integer of 0 to 5, n is an integer of 1 to 3, and X 5 is a cyano group, a carboxyl group, an alkoxycarbonyl group, an iodine atom, a bromine atom, or —CH 2 I).
- m is an integer of 0 to 5
- n is an integer of 1 to 3
- X 6 is a cyano group, a carboxyl group, an alkoxycarbonyl group, an iodine atom, a bromine atom, or —CH 2 OH.
- X 3 is preferably a fluorine atom.
- Rf 121 and Rf 131 are preferably perfluoroalkylene groups having 1 to 5 carbon atoms.
- R 121 is preferably a hydrogen atom.
- X 5 is preferably a cyano group, an alkoxycarbonyl group, an iodine atom, a bromine atom, or —CH 2 I.
- X 6 is preferably a cyano group, an alkoxycarbonyl group, an iodine atom, a bromine atom, or —CH 2 OH.
- CF 2 CFOCF 2 CF ( CF 3) OCF 2 CF 2 CN
- CF 2 CFOCF 2 CF (CF 3) OCF 2 CF 2 COOH
- CF 2 CFOCF 2 CF (CF 3) OCF 2 CF 2 CH 2 I
- CF 2 CFOCF 2 CF 2 CH 2 I
- CH 2 CFCF 2 OCF (CF 3) CF 2 OCF (CF 3) CN
- CH 2 CFCF 2 OCF (CF 3) CF 2 OCF (CF 3 ) COOH
- CH 2 CFCF 2 OCF (CF 3 ) CF 2 OCF (CF 3 ) CH 2 OH
- CH 2 CHCF 2 CF 2 I
- the fluorine-containing elastomer preferably has a glass transition temperature of ⁇ 70 ° C. or higher, more preferably ⁇ 60 ° C. or higher, and preferably ⁇ 50 ° C. or higher from the viewpoint of excellent compression set at high temperatures. Further preferred. Further, from the viewpoint of good cold resistance, it is preferably 5 ° C. or lower, more preferably 0 ° C. or lower, and further preferably ⁇ 3 ° C. or lower.
- the glass transition temperature is obtained by using a differential scanning calorimeter (Mettler Toledo, DSC822e) to obtain a DSC curve by raising the temperature of 10 mg of the sample at 10 ° C./min. It can be determined as the temperature indicating the midpoint of the two intersections of the extension of the line and the tangent at the inflection point of the DSC curve.
- the fluorine-containing elastomer preferably has a Mooney viscosity ML (1 + 20) at 170 ° C. of 30 or more, more preferably 40 or more, and still more preferably 50 or more from the viewpoint of good heat resistance. Further, in terms of good workability, it is preferably 150 or less, more preferably 120 or less, and even more preferably 110 or less.
- the fluorine-containing elastomer preferably has a Mooney viscosity ML (1 + 20) at 140 ° C. of 30 or more, more preferably 40 or more, and still more preferably 50 or more from the viewpoint of good heat resistance. Moreover, it is preferable that it is 180 or less at a point with favorable workability, It is more preferable that it is 150 or less, It is still more preferable that it is 110 or less.
- the fluorine-containing elastomer preferably has a Mooney viscosity ML (1 + 10) at 100 ° C. of 10 or more, more preferably 20 or more, and still more preferably 30 or more from the viewpoint of good heat resistance. Further, in terms of good workability, it is preferably 120 or less, more preferably 100 or less, and still more preferably 80 or less.
- the Mooney viscosity can be measured according to JIS K6300 at 170 ° C. or 140 ° C. and 100 ° C. using a Mooney viscometer MV2000E type manufactured by ALPHA TECHNOLOGIES.
- the partially fluorinated elastomers and perfluoroelastomers described above can be produced by conventional methods, but the resulting polymer has a narrow molecular weight distribution and is easy to control the molecular weight, and an iodine atom or bromine atom is introduced at the terminal. From the point that can be made, an iodine compound or a bromine compound can also be used as a chain transfer agent.
- Examples of the polymerization method performed using an iodine compound or a bromine compound include a method of performing emulsion polymerization in an aqueous medium while applying pressure in the presence of an iodine compound or a bromine compound in a substantially oxygen-free state. (Iodine transfer polymerization method).
- iodine compound or bromine compound to be used include, for example, the general formula: R 13 I x Br y (Wherein x and y are each an integer of 0 to 2 and satisfy 1 ⁇ x + y ⁇ 2, and R 13 represents a saturated or unsaturated fluorohydrocarbon group having 1 to 16 carbon atoms or chlorofluoro A hydrocarbon group, or a hydrocarbon group having 1 to 3 carbon atoms, which may contain an oxygen atom).
- an iodine compound or a bromine compound an iodine atom or a bromine atom is introduced into the polymer and functions as a crosslinking point.
- Examples of the iodine compound and bromine compound include 1,3-diiodoperfluoropropane, 2-iodoperfluoropropane, 1,3-diiodo-2-chloroperfluoropropane, 1,4-diiodoperfluorobutane, , 5-Diiodo-2,4-dichloroperfluoropentane, 1,6-diiodoperfluorohexane, 1,8-diiodoperfluorooctane, 1,12-diiodoperfluorododecane, 1,16-diiodo perfluoro hexadecane, diiodomethane, 1,2-diiodoethane, 1,3-diiodo -n- propane, CF 2 Br 2, BrCF 2 CF 2 Br, CF 3 CFBrCF 2 Br, CFClBr 2, BrCF 2 CFCl
- 1,4-diiodoperfluorobutane, 1,6-diiodoperfluorohexane, and 2-iodoperfluoropropane are used from the viewpoint of polymerization reactivity, crosslinking reactivity, availability, and the like. Is preferred.
- the composition of the present invention includes a hyperbranched polymer of a cage-type silsesquioxane represented by the general formula (1).
- the composition of the present invention is excellent in heat resistance, and can give a molded product having a small weight change with respect to oxygen plasma.
- the weight change with respect to fluorine-type plasma can also be made small.
- R 1 to R 8 are each independently a hydrogen atom, a halogen atom or an organic group, and at least one of R 1 to R 8 is an organic group.
- the organic group is preferably an alkyl group, an alkoxy group, or a phenyl group.
- the alkyl group and alkoxy group preferably have 1 to 1000 carbon atoms, more preferably 1 to 600, and still more preferably 1 to 400.
- the number of carbon atoms is 2 or more, two carbon atoms may be bonded by an amide bond, an imide bond, an ester bond, a urethane bond, a carbonate bond, or the like.
- R 1 to R 8 may contain a cyclic structure such as an aromatic ring.
- R 1 to R 8 may contain an amino group, a nitro group, a carboxyl group, a sulfo group, a hydroxyl group, a vinyl group, an epoxy group, a silyl group, an isocyanate group, or the like.
- the phenyl group may be substituted with one or more substituents.
- R 1 to R 8 preferably contain a cyclic structure such as an aromatic ring.
- R 1 to R 8 include a cyclic structure such as an aromatic ring, a rigid structure is radially arranged at the apex of the cage-type silsesquioxane lattice, which is excellent in heat resistance and plasma resistance.
- R 1 to R 8 are more preferably those containing an alkylene group, an oxyalkylene group or a divalent group represented by —C 6 H 4 —NH— and a divalent to hexavalent benzene ring. More preferably, the benzene ring is trivalent.
- the alkylene group and oxyalkylene group may each have 1 to 10 carbon atoms, and preferably 1 to 5 carbon atoms.
- the “n-valent benzene ring” means that n hydrogen atoms of the benzene ring are substituted with other organic groups.
- the cage-type silsesquioxane hyperbranched polymer usually has a distribution in molecular weight and molecular structure.
- Hyperbranched polymers are highly synthesized compared to dendrimers (single molecular weight polymers that do not have a molecular weight distribution) that are irregularly branched, but regularly and completely dendritically branched from the core. Easy.
- the molecular weight distribution (Mw / Mn) of the hyperbranched polymer of the cage silsesquioxane may be 1 to 20, preferably more than 1, and more preferably 2 or more.
- the molecular weight distribution can be determined by gel permeation chromatography analysis.
- the hyperbranched polymer preferably has a number average molecular weight of 2,000 to 300,000 from the viewpoint of solubility. More preferably, it is 4,000 to 30,000.
- the number average molecular weight can be determined by gel permeation chromatography analysis.
- the hyperbranched polymer has a highly branched molecular structure and is amorphous. Moreover, it has many chain ends into which a functional group can be introduced.
- the above hyperbranched polymer is a monomer compared to a dendrimer in which a monomer having a polyfunctional group is chemically reacted step by step to form a regular branched structure (a structure having a plurality of branched chain portions around the core portion). Can be produced at a stretch by polycondensation, and is easier to produce than dendrimers. Also, the manufacturing cost is low. Furthermore, the number of branches can be controlled by appropriately adjusting the synthesis conditions, and molecular design according to the application can be easily performed.
- the hyperbranched polymer has a cage-type silsesquioxane skeleton as a core and R 1 to R 8 as hyperbranches.
- the composition contains a hyperbranched polymer of a cage silsesquioxane, a molded product having a small weight change can be obtained with respect to both oxygen plasma and fluorine-based plasma exposed in the semiconductor device manufacturing process.
- the size of the molecule can be controlled by controlling the number of branches.
- R 1 to R 8 each independently include a terminal group T represented by the general formula (2).
- X 1 and X 2 are each independently —NH 2 , —OH, —SH, —H, —NH—CO—CF 3 or the following formula:
- R 1 to R 8 are represented by the following formula: It is also preferable that it is an organic group containing the terminal group T represented by these.
- R 9 is the same or different and is —NH 2 , —NHR 10 , —OH or —SH, and R 10 is a fluorine atom or a monovalent organic group.
- Examples of the monovalent organic group for R 10 include an aliphatic hydrocarbon group, a phenyl group, and a benzyl group.
- R 10 is a lower alkyl group having 1 to 10 carbon atoms, particularly 1 to 6 carbon atoms such as —CH 3 , —C 2 H 5 , —C 3 H 7, etc .; —CF 3 , — A fluorine-containing lower alkyl group having 1 to 10 carbon atoms, particularly 1 to 6 carbon atoms, such as C 2 F 5 , —CH 2 F, —CH 2 CF 3 , —CH 2 C 2 F 5 ; phenyl group; benzyl group; C 6 F 5, -CH 2 C 6 F 5 phenyl or benzyl 1-5 hydrogen atoms with fluorine atoms is substituted, such as; -C 6 H 5-n ( CF 3) n, -CH 2 A phenyl group or a benzyl group in which 1 to 5 hydrogen atoms are substituted with —CF 3 such as C 6 H 5-n (CF 3 ) n (n is an integer
- the hyperbranched polymer when —NH 2 and R 9 are located in the ortho position, the hyperbranched polymer also acts as a crosslinking agent. Therefore, it is possible to give a molded article having further excellent heat resistance and plasma resistance without using a general crosslinking agent as described later.
- the fluorine-containing polymer is preferably a copolymer including a polymer unit based on a fluoromonomer that gives the crosslinking site, and the fluoromonomer that gives the crosslinking site is A monomer having a cyano group is more preferable.
- hyperbranched polymer of the cage silsesquioxane examples include those in which R 1 to R 8 include a divalent group B1 represented by the following formula in the general formula (1).
- L is a divalent group represented by —NH—CO—, —O—CO—, —O—, —CO— or —OCH 2 —.
- L is preferably a divalent group represented by —NH—CO—.
- X 3 is the same as X 1 and X 2 described above. In the formula, X 3 is preferably —NH 2 .
- the divalent group B1 is preferably represented by the formula (3-1).
- the hyperbranched polymer of the cage silsesquioxane may be one in which R 1 to R 8 in the general formula (1) include a trivalent group B2 represented by the following formula.
- L 1 and L 2 are each independently a divalent group represented by —NH—CO—, —O—CO—, —O—, —CO— or —OCH 2 —.
- L 1 and L 2 are preferably a divalent group represented by —NH—CO—.
- the trivalent group B2 is preferably represented by the formula (3-2).
- At least one of the R 1 to R 8 contains a divalent group B1, or L of a trivalent group B2 It preferably includes a structure in which a terminal group T is bonded to either 1 or L 2 and a divalent group B1 or a trivalent group B2 is bonded to the other.
- the divalent group B1 or the trivalent group B2 is represented by the following formula:
- the divalent group B1 or the trivalent group B2 is bonded to the silicon atom of the cage silsesquioxane via the divalent group A1 or A2.
- bonded with bivalent group A1 or A2 via bivalent group B1 or trivalent group B2 is preferable.
- a plurality of divalent groups B1 or trivalent groups B2 may be bonded.
- R 1 to R 8 preferably contain 1 to 250 divalent groups B1 and trivalent groups B2 in total, and more preferably 1 to 60.
- R 1 to R 8 examples include those having the following structures.
- A is A1 or A2.
- B when B is a divalent group, it is a divalent group B1, and when it is a trivalent group, it is a trivalent group B2.
- any of R 1 to R 8 may have the following structure.
- the hyperbranched polymer can be obtained by reacting a cage-type silsesquioxane while adding a monomer having a polyfunctional group little by little. It can also be obtained by mixing a cage-type silsesquioxane and a monomer having a polyfunctional group and then reacting them.
- the composition preferably contains 0.5 to 100 parts by mass of the hyperbranched polymer of the cage silsesquioxane with respect to 100 parts by mass of the fluoropolymer.
- the amount is more preferably 5 to 50 parts by mass, still more preferably 5 to 25 parts by mass. If the amount of the hyperbranched polymer of the cage silsesquioxane is too small, the reinforcing property is poor, and if the amount of the hyperbranched polymer of the cage silsesquioxane is too large, it is hard and the sealing property is lowered.
- the composition preferably further contains a crosslinking agent.
- crosslinking agent examples include crosslinking agents used in peroxide crosslinking, polyol crosslinking, polyamine crosslinking, triazine crosslinking, oxazole crosslinking, imidazole crosslinking, and thiazole crosslinking.
- the crosslinking agent used in peroxide crosslinking may be an organic peroxide that can easily generate a peroxy radical in the presence of heat or a redox system.
- organic peroxide that can easily generate a peroxy radical in the presence of heat or a redox system.
- the crosslinking aid that can be used in this case may be a compound having a reaction activity with respect to a peroxy radical and a polymer radical.
- a peroxy radical and a polymer radical For example, CH 2 ⁇ CH—, CH 2 ⁇ CHCH 2 —, CF 2 And polyfunctional compounds having a functional group such as ⁇ CF—.
- triallyl cyanurate triallyl isocyanurate (TAIC)
- triacryl formal triallyl trimellitate, N, N′-n-phenylenebismaleimide, dipropargyl terephthalate, diallyl phthalate, tetraallyl Terephthalate amide, triallyl phosphate, bismaleimide, fluorinated triallyl isocyanurate (1,3,5-tris (2,3,3-trifluoro-2-propenyl) -1,3,5-triazine 2,4 6-trione), tris (diallylamine) -S-triazine, triallyl phosphite, N, N-diallylacrylamide, 1,6-divinyldodecafluorohexane and the like.
- crosslinking agent used for polyol crosslinking examples include polyhydric alcohol compounds such as bisphenol A and bisphenol AF.
- crosslinking agent used for polyamine crosslinking examples include polyvalent amine compounds such as hexamethylenediamine carbamate, N, N′-dicinnamylidene-1,6-hexanediamine, and 4,4′-bis (aminocyclohexyl) methanecarbamate.
- crosslinking agent used for triazine crosslinking examples include organotin compounds such as tetraphenyltin and triphenyltin.
- crosslinking agent used in the oxazole crosslinking system examples include, for example, the general formula (20):
- R 4 is —SO 2 —, —O—, —CO—, an alkylene group having 1 to 6 carbon atoms, a perfluoroalkylene group having 1 to 10 carbon atoms, a single bond, or
- R 5 and R 6 are one of —NH 2 and the other is —NHR 7 , —NH 2 , —OH or —SH, and R 7 is a hydrogen atom, a fluorine atom or a monovalent group
- An organic group preferably R 5 is —NH 2 and R 6 is —NHR 7 .
- Preferable specific examples of the alkylene group having 1 to 6 carbon atoms include methylene group, ethylene group, propylene group, butylene group, pentylene group, hexylene group and the like.
- the perfluoroalkylene group having 1 to 10 carbon atoms Is
- R f 3 is a perfluoroalkylene group having 1 to 10 carbon atoms
- n is an integer of 1 to 10
- bisaminophenol-based crosslinking agents bisaminothiophenol-based crosslinking agents, bisdiaminophenyl-based crosslinking agents, etc. are those conventionally used for crosslinking systems having a cyano group as a crosslinking point. It reacts with the group to form an oxazole ring, a thiazole ring and an imidazole ring to give a cross-linked product.
- crosslinking agents include compounds having a plurality of 3-amino-4-hydroxyphenyl groups or 3-amino-4-mercaptophenyl groups, or a compound represented by the general formula (24):
- R 4 , R 5 , and R 6 are the same as those described above), specifically, for example, 2,2-bis (3-amino-4-hydroxyphenyl) hexa Fluoropropane (generic name: bis (aminophenol) AF), 2,2-bis (3-amino-4-mercaptophenyl) hexafluoropropane, tetraaminobenzene, bis-3,4-diaminophenylmethane, bis-3 , 4-diaminophenyl ether, 2,2-bis (3,4-diaminophenyl) hexafluoropropane, 2,2-bis [3-amino-4- (N-phenylamino) phenyl] hexafluoropropane, 2, 2-bis [3-amino-4- (N-methylamino) phenyl] hexafluoropropane, 2,2-bis [3-amino-4- (N-ethy
- 2,2-bis [3-amino-4- (N-phenylamino) phenyl] hexafluoropropane is used as a crosslinking agent from the viewpoint of heat resistance, steam resistance, amine resistance, and good crosslinkability. Is preferred.
- the crosslinking agent is preferably 0.05 to 10 parts by mass, more preferably 0.5 to 5 parts by mass with respect to 100 parts by mass of the fluoropolymer.
- the amount of the crosslinking agent is less than 0.05 parts by mass, the fluorine-containing polymer tends not to be sufficiently crosslinked, and when it exceeds 10 parts by mass, the physical properties of the crosslinked product tend to be deteriorated.
- the composition may contain a general filler.
- Examples of the general filler include imide fillers having an imide structure such as polyimide, polyamideimide, and polyetherimide; polyarylate, polysulfone, polyethersulfone, polyphenylene sulfide, polyetheretherketone, polyetherketone, polyoxy Organic fillers made of engineering plastics such as benzoate; metal oxide fillers such as aluminum oxide, silicon oxide and yttrium oxide; metal carbide fillers such as silicon carbide and aluminum carbide; metal nitride fillers such as silicon nitride and aluminum nitride; aluminum fluoride And inorganic fillers such as carbon fluoride.
- imide fillers having an imide structure such as polyimide, polyamideimide, and polyetherimide
- polyarylate polysulfone, polyethersulfone, polyphenylene sulfide, polyetheretherketone, polyetherketone, polyoxy Organic fillers made of engineering plastics such as benzoate
- metal oxide fillers such as aluminum oxide
- aluminum oxide, yttrium oxide, silicon oxide, polyimide, and carbon fluoride are preferable from the viewpoint of the shielding effect of various plasmas.
- the blending amount of the general filler is preferably 0.5 to 100 parts by mass, more preferably 5 to 50 parts by mass with respect to 100 parts by mass of the fluoropolymer.
- the said composition can be prepared by mixing said each component using a normal polymer processing machine, for example, an open roll, a Banbury mixer, a kneader, etc. In addition, it can be prepared by a method using a closed mixer.
- the composition can be suitably used as a molding material for obtaining a molded product by molding, and can also be suitably used as a molding material for obtaining a molded product by cross-linking molding.
- a method for obtaining a preform using the composition as a molding material may be a conventional method, and may be a known method such as a method of heat-compressing with a mold, a method of press-fitting into a heated mold, or a method of extruding with an extruder. Can be done.
- a molded product can be obtained by performing heat crosslinking with steam after extrusion.
- Kneading method Roll kneading press cross-linking: oven cross-linking at 180 ° C. for 30 minutes: 290 ° C. for 18 hours. Unless otherwise stated, cross-linking is performed under these conditions.
- the present invention is also a molded article obtained from the above composition.
- the molded article of the present invention can be suitably used as a sealing material for a semiconductor manufacturing apparatus that requires a particularly high level of cleanliness, particularly a semiconductor manufacturing apparatus that performs high-density plasma irradiation.
- the sealing material include O-ring, square ring, gasket, packing, oil seal, bearing seal, lip seal and the like.
- it can also be used as various polymer products used in semiconductor manufacturing equipment, such as diaphragms, tubes, hoses, various rubber rolls, and belts. It can also be used as a coating material and a lining material.
- the semiconductor manufacturing apparatus referred to in the present invention is not particularly limited to an apparatus for manufacturing a semiconductor, and is widely used as a semiconductor that requires a high degree of cleanness, such as an apparatus for manufacturing a liquid crystal panel or a plasma panel. This includes all manufacturing equipment used in the field, and examples include the following.
- etching apparatus dry etching apparatus plasma etching apparatus reactive ion etching apparatus reactive ion beam etching apparatus sputter etching apparatus ion beam etching apparatus wet etching apparatus ashing apparatus
- cleaning apparatus dry etching cleaning apparatus UV / O 3 cleaning apparatus ion Beam cleaning device
- Laser beam cleaning device Plasma cleaning device Gas etching cleaning device
- Extraction cleaning device Soxhlet extraction cleaning device
- High temperature high pressure extraction cleaning device Microwave extraction cleaning device Supercritical extraction cleaning device
- Exposure device Stepper coater / developer (4) Polishing device CMP apparatus (5) film forming apparatus CVD apparatus sputtering apparatus (6) diffusion / ion implantation apparatus oxidation diffusion apparatus ion implantation apparatus
- the molded article of the present invention exhibits excellent performance as a sealing material for, for example, a CVD apparatus, a plasma etching apparatus, a reactive ion etching apparatus, an ashing apparatus, or an excimer laser exposure machine.
- the reaction solution was reprecipitated in 5% sodium bicarbonate water, and the precipitated solid was collected by filtration.
- the solid was put into 5% aqueous sodium bicarbonate, stirred, washed, and then recovered by filtration, followed by drying under reduced pressure at room temperature to obtain the target third-generation m-phenylenediamine-terminated hyperbranched polymer.
- the yield was 88%.
- n represents the following formula (A):
- the total number of groups represented by B and C structures are necessarily included in the part enclosed by parentheses with n.
- the POSS having an amino group has the following formula:
- R 1 to R 8 are —C 6 H 4 —NH 2 .
- Synthesis example 2 POSS (0.095 mmol) having an amino group was dissolved in 1 mL of DMAc. This solution was heated to 120 ° C. under a nitrogen atmosphere, and triphenyl phosphite (2.7 mmol) and 3,5-diaminobenzoic acid (2.4 mmol) dissolved in 2 mL of DMAc were added dropwise over 1 hour. . After completion of dropping, the reaction was further carried out at 120 ° C. for 1.5 hours.
- the obtained fluorine-containing elastomer composition was subjected to crosslinking by pressing at 180 ° C. for 30 minutes, and then oven-crosslinked in an oven at 290 ° C. over 18 hours to obtain a molded product.
- the obtained molded product was evaluated for plasma resistance described later. The results of the plasma resistance evaluation are shown in Table 1.
- Example 2 Except for changing the hyperbranched polymer corresponding to the third generation obtained in Synthesis Example 1 to the o-phenylenediamine-terminated hyperbranched polymer corresponding to the third generation obtained in Synthetic Example 2, the same procedure as in Example 1 was performed. A fluorine-containing elastomer composition was obtained. A molded product was obtained from the obtained fluorine-containing elastomer composition in the same manner as in Example 1. The obtained molded product was evaluated for plasma resistance described later. The results of the plasma resistance evaluation are shown in Table 1.
- Example 3 Example 3 except that the hyperbranched polymer corresponding to the third generation obtained in Synthesis Example 1 was changed to the m-phenylenebis (trifluoroacetamide) -terminated hyperbranched polymer corresponding to the third generation obtained in Synthetic Example 3.
- a fluorine-containing elastomer composition was obtained.
- a molded product was obtained from the obtained fluorine-containing elastomer composition in the same manner as in Example 1. The obtained molded product was evaluated for plasma resistance described later. The results of the plasma resistance evaluation are shown in Table 1.
- Comparative Example 1 A fluorine-containing elastomer composition was obtained in the same manner as in Example 1 except that the hyperbranched polymer obtained in Synthesis Example 1 was not blended. A molded product was obtained from the obtained fluorine-containing elastomer composition in the same manner as in Example 1. The obtained molded product was evaluated for plasma resistance described later. The results of the plasma resistance evaluation are shown in Table 1.
- Oxygen plasma irradiation conditions Gas flow rate: 16sccm RF output: 400W Pressure: 2.6Pa Etching time: 30 minutes CF 4 plasma irradiation conditions: Gas flow rate: 16sccm RF output: 400W Pressure: 2.6Pa Etching time: 30 minutes
- Etching amount measurement Using a laser microscope VK-9700 manufactured by Keyence Corporation, the amount of etching was examined by measuring the level difference between the coated surface and the exposed surface.
- Example 4 10 parts by mass of the third generation hyperbranched polymer (m-phenylenediamine-terminated hyperbranched polymer) obtained in Synthesis Example 1 is premixed in 1500 parts by mass of a fluorine-containing solvent with respect to 100 parts by mass of the fluorine-containing elastomer. Then, the fluorine-containing solvent was volatilized at 60 ° C. and kneaded with an open roll to obtain a fluorine-containing elastomer composition.
- the fluorine-containing elastomer is a perfluoroelastomer made of Daikin Perfume GA-105 manufactured by Daikin Industries, Ltd. and tetrafluoroethylene / perfluoroalkyl vinyl ether.
- the fluorine-containing solvent used was R-318 (manufactured by Daikin Industries, Ltd., main component: C 4 F 8 Cl 2 ).
- the obtained fluorine-containing elastomer composition was press-molded at 85 ° C. for 10 minutes.
- the obtained molded product was measured for a 50% mass reduction temperature. The measurement results are shown in Table 2.
- Example 5 Except for changing the hyperbranched polymer corresponding to the third generation obtained in Synthesis Example 1 to the o-phenylenediamine-terminated hyperbranched polymer corresponding to the third generation obtained in Synthetic Example 2, the same procedure as in Example 4 was performed. A fluorine-containing elastomer composition was obtained. A molded product was obtained from the obtained fluorine-containing elastomer composition in the same manner as in Example 4. The obtained molded product was measured for a 50% mass reduction temperature. The measurement results are shown in Table 2.
- Example 6 Example 3 except that the hyperbranched polymer corresponding to the third generation obtained in Synthesis Example 1 was changed to the m-phenylenebis (trifluoroacetamide) -terminated hyperbranched polymer corresponding to the third generation obtained in Synthetic Example 3.
- a fluorine-containing elastomer composition was obtained.
- a molded product was obtained from the obtained fluorine-containing elastomer composition in the same manner as in Example 4.
- the obtained molded product was measured for a 50% mass reduction temperature. The measurement results are shown in Table 2.
- Comparative Example 2 A fluorine-containing elastomer composition was obtained in the same manner as in Example 4 except that the hyperbranched polymer corresponding to the third generation obtained in Synthesis Example 1 was not blended. A molded product was obtained from the obtained fluorine-containing elastomer composition in the same manner as in Example 4. The obtained molded product was measured for a 50% mass reduction temperature. The measurement results are shown in Table 2.
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Abstract
Description
一般式(1):
上記かご型シルセスキオキサンのハイパーブランチポリマーは、分子量に分布をもつことが好ましい。
一般式(2):
一般式(8):CF2=CF-ORf81
(式中、Rf81は、炭素数1~8のパーフルオロアルキル基を表す。)で表されるフルオロモノマー、
一般式(10):CF2=CFOCF2ORf101
(式中、Rf101は炭素数1~6の直鎖又は分岐状パーフルオロアルキル基、炭素数5~6の環式パーフルオロアルキル基、1~3個の酸素原子を含む炭素数2~6の直鎖又は分岐状パーフルオロオキシアルキル基である)で表されるフルオロモノマー、及び、
一般式(11):CF2=CFO(CF2CF(Y11)O)m(CF2)nF
(式中、Y11はフッ素原子又はトリフルオロメチル基を表す。mは1~4の整数である。nは1~4の整数である。)で表されるフルオロモノマー
からなる群より選択される少なくとも1種であることが好ましく、
一般式(8)で表されるフルオロモノマーがより好ましい。
その組成は、TFE/PMVE共重合体の場合、好ましくは、45~90/10~55(モル%)であり、より好ましくは、55~80/20~45であり、更に好ましくは、55~70/30~45である。
TFE/PMVE/架橋部位を与えるモノマー共重合体の場合、好ましくは、45~89.9/10~54.9/0.01~4(モル%)であり、より好ましくは、55~77.9/20~49.9/0.1~3.5であり、更に好ましくは、55~69.8/30~44.8/0.2~3である。
TFE/炭素数が4~12の一般式(8)、(10)又は(11)で表されるフルオロモノマー共重合体の場合、好ましくは、50~90/10~50(モル%)であり、より好ましくは、60~88/12~40であり、更に好ましくは、65~85/15~35である。
TFE/炭素数が4~12の一般式(8)、(10)又は(11)で表されるフルオロモノマー/架橋部位を与えるモノマー共重合体の場合、好ましくは、50~89.9/10~49.9/0.01~4(モル%)であり、より好ましくは、60~87.9/12~39.9/0.1~3.5であり、更に好ましくは、65~84.8/15~34.8/0.2~3である。
これらの組成の範囲を外れると、ゴム弾性体としての性質が失われ、樹脂に近い性質となる傾向がある。
一般式(12):CX3 2=CX3-Rf 121CHR121X4
(式中、X3は、水素原子、フッ素原子又はCH3、Rf 121は、フルオロアルキレン基、パーフルオロアルキレン基、フルオロ(ポリ)オキシアルキレン基又はパーフルオロ(ポリ)オキシアルキレン基、R121は、水素原子又はCH3、X4は、ヨウ素原子又は臭素原子である)で表されるフルオロモノマー、
一般式(13):CX3 2=CX3-Rf 131X4
(式中、X3は、水素原子、フッ素原子又はCH3、Rf 131は、フルオロアルキレン基、パーフルオロアルキレン基、フルオロポリオキシアルキレン基又はパーフルオロポリオキシアルキレン基、X4は、ヨウ素原子又は臭素原子である)で表されるフルオロモノマー、
一般式(14):CF2=CFO(CF2CF(CF3)O)m(CF2)n-X5
(式中、mは0~5の整数、nは1~3の整数、X5は、シアノ基、カルボキシル基、アルコキシカルボニル基、ヨウ素原子、臭素原子、又は、-CH2Iである)で表されるフルオロモノマー、及び、
一般式(15):CH2=CFCF2O(CF(CF3)CF2O)m(CF(CF3))n-X6
(式中、mは0~5の整数、nは1~3の整数、X6は、シアノ基、カルボキシル基、アルコキシカルボニル基、ヨウ素原子、臭素原子、又は-CH2OHである)で表されるフルオロモノマー、及び、
一般式(16):CR162R163=CR164-Z-CR165=CR166R167
(式中、R162、R163、R164、R165、R166及びR167、は、同一又は異なって、水素原子又は炭素数1~5のアルキル基である。Zは、直鎖又は分岐状で酸素原子を有していてもよい、炭素数1~18のアルキレン基、炭素数3~18のシクロアルキレン基、少なくとも部分的にフッ素化している炭素数1~10のアルキレン基若しくはオキシアルキレン基、又は、
-(Q)p-CF2O-(CF2CF2O)m(CF2O)n-CF2-(Q)p-
(式中、Qはアルキレン基またはオキシアルキレン基である。pは0または1である。m/nが0.2~5である。)で表され、分子量が500~10000である(パー)フルオロポリオキシアルキレン基である。)で表されるモノマーからなる群より選択される少なくとも1種であることが好ましい。
R13IxBry
(式中、xおよびyはそれぞれ0~2の整数であり、かつ1≦x+y≦2を満たすものであり、R13は炭素数1~16の飽和もしくは不飽和のフルオロ炭化水素基またはクロロフルオロ炭化水素基、または炭素数1~3の炭化水素基であり、酸素原子を含んでいてもよい)で表される化合物が挙げられる。ヨウ素化合物又は臭素化合物を使用することによって、ヨウ素原子または臭素原子が重合体に導入され、架橋点として機能する。
上記アルキル基及びアルコキシ基は、炭素数が1~1000であることが好ましく、1~600であることがより好ましく、1~400であることがさらに好ましい。また、炭素数が2以上である場合、2つの炭素原子がアミド結合、イミド結合、エステル結合、ウレタン結合、カーボネート結合等により結合していてもよい。
上記フェニル基は、1以上の置換基により置換されたものであってもよい。
R1~R8が芳香族環等の環状構造を含むことにより、かご型シルセスキオキサン格子の頂点に剛直な構造が放射状に配置されることから、耐熱性、耐プラズマ性に優れる。
なお、本明細書中で「n価のベンゼン環」と記載する場合は、ベンゼン環のn個の水素原子が、他の有機基に置換されているものを意味する。
上記分子量分布は、ゲル浸透クロマトグラフィー分析により求めることができる。
上記数平均分子量は、ゲル浸透クロマトグラフィー分析により求めることができる。
上記ハイパーブランチポリマーは、多官能基を有するモノマーを一段階ずつ化学反応させて規則的な分岐構造(コア部分を中心に複数の分岐した鎖状部分を有する構造)を形成させるデンドリマーに比べ、モノマーから重縮合で一気に製造することができるため、デンドリマーよりも製造が容易である。また、製造コストも安価である。
更に、合成条件を適宜調整することにより分岐の数を制御でき、用途に応じた分子設計も容易に実施できる。
上記組成物がかご型シルセスキオキサンのハイパーブランチポリマーを含むものであると、半導体デバイスの製造工程で曝される酸素プラズマおよびフッ素系プラズマに対してともに重量変化が小さい成形品を得ることができる。また、分岐の数を制御することによって、分子の大きさを制御できるという利点もある。
上記R10における1価の有機基としては、例えば、脂肪族炭化水素基、フェニル基またはベンジル基があげられる。具体的には、たとえば、R10の少なくとも1つが-CH3、-C2H5、-C3H7などの炭素数1~10、特に1~6の低級アルキル基;-CF3、-C2F5、-CH2F、-CH2CF3、-CH2C2F5などの炭素数1~10、特に1~6のフッ素原子含有低級アルキル基;フェニル基;ベンジル基;-C6F5、-CH2C6F5などのフッ素原子で1~5個の水素原子が置換されたフェニル基またはベンジル基;-C6H5-n(CF3)n、-CH2C6H5-n(CF3)n(nは1~5の整数)などの-CF3で1~5個の水素原子が置換されたフェニル基またはベンジル基が好ましい。
架橋反応性が良好であるため、上記R9は-NH2又は-OHであることが好ましく、-NH2であることがより好ましい。
更に具体的な例を以下に示す。
含フッ素ポリマー 100質量部
架橋剤 2,2-ビス[3-アミノ-4-(N-フェニルアミノ)フェニル]ヘキサフルオロプロパン 1質量部
ケイ素化合物 15質量部
混練方法 :ロール練り
プレス架橋 :180℃で30分間
オーブン架橋:290℃で18時間
であり、特にことわらない限りは、この条件で架橋する。
本発明の成形品は、特に高度なクリーンさが要求される半導体製造装置、特に高密度プラズマ照射が行なわれる半導体製造装置のシール材として好適に使用できる。上記シール材としては、O-リング、角-リング、ガスケット、パッキン、オイルシール、ベアリングシール、リップシール等が挙げられる。
そのほか、半導体製造装置に使用される各種のポリマー製品、例えばダイヤフラム、チューブ、ホース、各種ゴムロール、ベルト等としても使用できる。また、コーティング用材料、ライニング用材料としても使用できる。
ドライエッチング装置
プラズマエッチング装置
反応性イオンエッチング装置
反応性イオンビームエッチング装置
スパッタエッチング装置
イオンビームエッチング装置
ウェットエッチング装置
アッシング装置
(2)洗浄装置
乾式エッチング洗浄装置
UV/O3洗浄装置
イオンビーム洗浄装置
レーザービーム洗浄装置
プラズマ洗浄装置
ガスエッチング洗浄装置
抽出洗浄装置
ソックスレー抽出洗浄装置
高温高圧抽出洗浄装置
マイクロウェーブ抽出洗浄装置
超臨界抽出洗浄装置
(3)露光装置
ステッパー
コータ・デベロッパー
(4)研磨装置
CMP装置
(5)成膜装置
CVD装置
スパッタリング装置
(6)拡散・イオン注入装置
酸化拡散装置
イオン注入装置
分子量および分子量分布は、ゲル浸透クロマトグラフィー(カラム:東ソー株式会社製TSKgel GMHHR-M)により,標準ポリスチレン換算値として測定した。
Polymer、2003、44、4491-4499に記載の方法を参照し、下記式:
アミノ基を有するPOSS(0.095mmol)をDMAc1mLに溶解させた。この溶液を窒素雰囲気下で120℃に加熱し、そこに亜リン酸トリフェニル(2.7mmol)およびDMAc2mLに溶解させた3,5-ジアミノ安息香酸(2.4mmol)を1時間かけて滴下した。滴下終了後、120℃でさらに1.5時間反応させた。この反応溶液に亜リン酸トリフェニル(3.7mmol)およびDMAc2mLに溶解させた3,4-ビス(トリフルオロアセトアミド)安息香酸(3.3mmol)を加え、さらに3時間反応させた。反応終了後、反応溶液を5%重曹水に再沈殿させ、析出した固体をろ過により回収後、室温で減圧乾燥させた。得られた固体をDMAc4mLに溶解させ、ヒドラジン5mLを加えて50℃で2時間反応させた。反応終了後、反応溶液を5%重曹水に再沈殿させ、析出した固体をろ過することで回収した。室温で減圧乾燥させることで目的とする第3世代相当のo-フェニレンジアミン末端ハイパーブランチポリマーを得た。収率は92%であった。得られたハイパーブランチポリマーのMwおよびMw/Mnはそれぞれ、Mw=58,900、Mw/Mn=3.8であった。
合成例1で得られたm-フェニレンジアミン末端ハイパーブランチポリマー(0.02mmol)をDMAc3mLに溶解させ,そこにトリフルオロ酢酸無水物(2.6mmol)を加えて室温で6時間反応させた。反応溶液を5%重曹水に再沈殿させ、析出した固体をろ過することで回収した。固体を5%重曹水に投入、撹拌し、ろ過で回収という洗浄操作を行った後、室温で減圧乾燥させることで目的とする第3世代相当のm-フェニレンビス(トリフルオロアセトアミド)末端ハイパーブランチポリマーを得た。収率は91%であった。得られたハイパーブランチポリマーのMwおよびMw/Mnはそれぞれ、Mw=60,100、Mw/Mn=3.3であった。
含フッ素エラストマー(TFE/PMVE/シアノ基含有単量体=59.4/40.1/0.5(モル比))100質量部に対して、合成例1で得られた第3世代相当のハイパーブランチポリマー(m-フェニレンジアミン末端ハイパーブランチポリマー)10質量部、架橋剤2,2-ビス[3-アミノ-4-(N-フェニルアミノ)フェニル]ヘキサフルオロプロパン0.8質量部を1500質量部の含フッ素溶剤中で予備混合してから、60℃で含フッ素溶剤を揮発させ、オープンロールにて混練して含フッ素エラストマー組成物を得た。なお、含フッ素溶剤は、R-318(ダイキン工業(株)製、主成分:C4F8Cl2)を用いた。
得られた成形品について、後述の耐プラズマ性評価を行った。耐プラズマ性評価の結果を表1に示す。
合成例1で得られた第3世代相当のハイパーブランチポリマーを合成例2で得られた第3世代相当のo-フェニレンジアミン末端ハイパーブランチポリマーに変更したこと以外は、実施例1と同様にして、含フッ素エラストマー組成物を得た。得られた含フッ素エラストマー組成物から、実施例1と同様にして、成形品を得た。得られた成形品について、後述の耐プラズマ性評価を行った。耐プラズマ性評価の結果を表1に示す。
合成例1で得られた第3世代相当のハイパーブランチポリマーを合成例3で得られた第3世代相当のm-フェニレンビス(トリフルオロアセトアミド)末端ハイパーブランチポリマーに変更したこと以外は、実施例1と同様にして、含フッ素エラストマー組成物を得た。得られた含フッ素エラストマー組成物から、実施例1と同様にして、成形品を得た。得られた成形品について、後述の耐プラズマ性評価を行った。耐プラズマ性評価の結果を表1に示す。
合成例1で得られたハイパーブランチポリマーを配合しなかった以外は、実施例1と同様にして、含フッ素エラストマー組成物を得た。得られた含フッ素エラストマー組成物から、実施例1と同様にして、成形品を得た。得られた成形品について、後述の耐プラズマ性評価を行った。耐プラズマ性評価の結果を表1に示す。
実施例1~3、比較例1で得られた成形品について、一部をカプトン電気絶縁用テープにて被覆し、つぎの条件下で酸素プラズマおよびCF4プラズマ照射処理を行い、被覆面と暴露面との段差を測定してエッチング量を調べた。結果を表1に示す。
ガス流量:16sccm
RF出力:400W
圧力:2.6Pa
エッチング時間:30分間
CF4プラズマ照射条件:
ガス流量:16sccm
RF出力:400W
圧力:2.6Pa
エッチング時間:30分間
株式会社キーエンス製 レーザマイクロスコープVK-9700を使用し、被覆面と暴露面との段差を測定してエッチング量を調べた。
含フッ素エラストマー100質量部に対して、合成例1で得られた第3世代相当のハイパーブランチポリマー(m-フェニレンジアミン末端ハイパーブランチポリマー)10質量部を1500質量部の含フッ素溶剤中で予備混合してから、60℃で含フッ素溶剤を揮発させ、オープンロールにて混練して含フッ素エラストマー組成物を得た。なお、含フッ素エラストマーは、ダイキン工業(株)製 ダイエルパーフロGA-105、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からなるパーフルオロエラストマーである。また、含フッ素溶剤は、R-318(ダイキン工業(株)製、主成分:C4F8Cl2)を用いた。
合成例1で得られた第3世代相当のハイパーブランチポリマーを合成例2で得られた第3世代相当のo-フェニレンジアミン末端ハイパーブランチポリマーに変更したこと以外は、実施例4と同様にして、含フッ素エラストマー組成物を得た。得られた含フッ素エラストマー組成物から、実施例4と同様にして、成形品を得た。得られた成形品について、50%質量減少温度の測定を行った。測定結果を表2に示す。
合成例1で得られた第3世代相当のハイパーブランチポリマーを合成例3で得られた第3世代相当のm-フェニレンビス(トリフルオロアセトアミド)末端ハイパーブランチポリマーに変更したこと以外は、実施例4と同様にして、含フッ素エラストマー組成物を得た。得られた含フッ素エラストマー組成物から、実施例4と同様にして、成形品を得た。得られた成形品について、50%質量減少温度の測定を行った。測定結果を表2に示す。
合成例1で得られた第3世代相当のハイパーブランチポリマーを配合しなかった以外は、実施例4と同様にして、含フッ素エラストマー組成物を得た。得られた含フッ素エラストマー組成物から、実施例4と同様にして、成形品を得た。得られた成形品について、50%質量減少温度の測定を行った。測定結果を表2に示す。
熱質量計(セイコーインスツルメンツ社製 TG-DTA6200)を用い、空気200ml/min、昇温速度10℃/min、温度範囲20~600℃の条件で質量変化を測定し、50%質量減少時の温度を測定した。結果を表2に示す。
Claims (9)
- かご型シルセスキオキサンのハイパーブランチポリマーは、分子量に分布をもつ請求項1記載の組成物。
- 含フッ素ポリマーは、含フッ素エラストマーである請求項1、2、3又は4記載の組成物。
- 含フッ素ポリマー100質量部に対して0.5~100質量部のかご型シルセスキオキサンのハイパーブランチポリマーを含む請求項1、2、3、4又は5記載の組成物。
- 更に、架橋剤を含む請求項1、2、3、4、5又は6記載の組成物。
- 成形材料である請求項1、2、3、4、5、6又は7記載の組成物。
- 請求項1、2、3、4、5、6、7又は8記載の組成物から得られる成形品。
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WO2019216290A1 (ja) * | 2018-05-07 | 2019-11-14 | 国立大学法人お茶の水女子大学 | シルセスキオキサン |
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CN109476896B (zh) | 2021-05-18 |
JP6713600B2 (ja) | 2020-06-24 |
EP3486283B1 (en) | 2022-06-15 |
US20190169415A1 (en) | 2019-06-06 |
JPWO2018030427A1 (ja) | 2019-02-21 |
EP3486283A1 (en) | 2019-05-22 |
TW201825597A (zh) | 2018-07-16 |
TWI693258B (zh) | 2020-05-11 |
CN109476896A (zh) | 2019-03-15 |
KR102168898B1 (ko) | 2020-10-22 |
EP3486283A4 (en) | 2020-03-11 |
KR20190039194A (ko) | 2019-04-10 |
US10815369B2 (en) | 2020-10-27 |
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