WO2015080202A1 - ワイパーブレードゴム用コーティング剤及びそれを用いたワイパーブレードゴム - Google Patents
ワイパーブレードゴム用コーティング剤及びそれを用いたワイパーブレードゴム Download PDFInfo
- Publication number
- WO2015080202A1 WO2015080202A1 PCT/JP2014/081380 JP2014081380W WO2015080202A1 WO 2015080202 A1 WO2015080202 A1 WO 2015080202A1 JP 2014081380 W JP2014081380 W JP 2014081380W WO 2015080202 A1 WO2015080202 A1 WO 2015080202A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wiper blade
- blade rubber
- binder
- coating agent
- polyurethane resin
- Prior art date
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 130
- 239000005060 rubber Substances 0.000 title claims abstract description 128
- 239000011248 coating agent Substances 0.000 title claims abstract description 90
- 239000011230 binding agent Substances 0.000 claims abstract description 114
- 239000007787 solid Substances 0.000 claims abstract description 85
- 239000011247 coating layer Substances 0.000 claims abstract description 83
- 239000004417 polycarbonate Substances 0.000 claims abstract description 80
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 80
- 229920005749 polyurethane resin Polymers 0.000 claims abstract description 80
- 239000000314 lubricant Substances 0.000 claims abstract description 53
- 238000001035 drying Methods 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 13
- 239000012736 aqueous medium Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 8
- 238000000790 scattering method Methods 0.000 claims description 5
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- 230000000052 comparative effect Effects 0.000 description 23
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- 238000005299 abrasion Methods 0.000 description 8
- 239000003960 organic solvent Substances 0.000 description 8
- 230000005855 radiation Effects 0.000 description 8
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- 230000007774 longterm Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
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- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 4
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- 229920002635 polyurethane Polymers 0.000 description 4
- 239000004814 polyurethane Substances 0.000 description 4
- 230000001953 sensory effect Effects 0.000 description 4
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- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 241000428199 Mustelinae Species 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 229920001084 poly(chloroprene) Polymers 0.000 description 3
- 229920005862 polyol Polymers 0.000 description 3
- 150000003077 polyols Chemical class 0.000 description 3
- -1 snow Substances 0.000 description 3
- 239000008096 xylene Substances 0.000 description 3
- ZFPGARUNNKGOBB-UHFFFAOYSA-N 1-Ethyl-2-pyrrolidinone Chemical compound CCN1CCCC1=O ZFPGARUNNKGOBB-UHFFFAOYSA-N 0.000 description 2
- 238000005160 1H NMR spectroscopy Methods 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 2
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- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- YBBRCQOCSYXUOC-UHFFFAOYSA-N sulfuryl dichloride Chemical compound ClS(Cl)(=O)=O YBBRCQOCSYXUOC-UHFFFAOYSA-N 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- SVONRAPFKPVNKG-UHFFFAOYSA-N 2-ethoxyethyl acetate Chemical compound CCOCCOC(C)=O SVONRAPFKPVNKG-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
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- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
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- 238000010894 electron beam technology Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-M hexanoate Chemical compound CCCCCC([O-])=O FUZZWVXGSFPDMH-UHFFFAOYSA-M 0.000 description 1
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- 239000011133 lead Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
- B60S1/38—Wiper blades
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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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
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- C—CHEMISTRY; METALLURGY
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
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- C—CHEMISTRY; METALLURGY
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
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- C—CHEMISTRY; METALLURGY
- 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
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/06—Polyurethanes from polyesters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/69—Particle size larger than 1000 nm
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M103/00—Lubricating compositions characterised by the base-material being an inorganic material
- C10M103/02—Carbon; Graphite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S1/00—Cleaning of vehicles
- B60S1/02—Cleaning windscreens, windows or optical devices
- B60S1/04—Wipers or the like, e.g. scrapers
- B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
- B60S1/38—Wiper blades
- B60S2001/3827—Wiper blades characterised by the squeegee or blade rubber or wiping element
- B60S2001/3829—Wiper blades characterised by the squeegee or blade rubber or wiping element characterised by the material of the squeegee or coating thereof
-
- C—CHEMISTRY; METALLURGY
- 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
- C08J2321/00—Characterised by the use of unspecified rubbers
-
- C—CHEMISTRY; METALLURGY
- 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
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/08—Solids
Definitions
- the present invention relates to a coating for a wiper blade rubber used in a wiper device for wiping small particles such as rain water, snow, dust and the like, and a wiper blade rubber using the same.
- a wiper In transportation equipment such as vehicles, aircraft, ships, etc., and industrial machinery such as construction machines, a wiper is used as a sliding member to wipe off moisture and particles attached to a smooth surface such as glass.
- a wiper blade rubber is attached to the sliding portion of the wiper.
- a windshield wiper of a car rainwater, snowfall, dust, mud and the like attached to the glass surface by the wiping operation of the wiper blade rubber are removed as the wiper is driven.
- resin elastomer or the like is used in addition to the rubber material, but generally, the rubber material is used.
- Wiping of rain water adhering to the glass surface of cars etc. means that the wiper blade rubber removes dust and mud adhering to the glass surface and smoothes the rain water into a uniform water film to make it a uniform wet state and scattering of transmitted light To ensure the driver's visibility.
- the adhesion of dirt, wax, etc. adhering to the glass surface causes unevenness in the friction state of the glass surface, and the sliding characteristics of the wiper blade rubber sliding on the glass surface are not uniform. Wiper blade rubber is caused by repeated stick and slip "vibbling", partial wiping left by dragging to become streaky "stripe left", water film partially cut off "unevening" There is a problem that occurs.
- the present invention has excellent friction performance that can maintain low friction even in initial and long-term use, and excellent wiping performance that can sufficiently suppress wiping noise such as uneven wiping, and is excellent in suppressing abrasion and the like. It is an object of the present invention to provide a wiper blade rubber coating which imparts durability and a wiper blade rubber using the same.
- the present invention 1 relates to a coating agent for wiper blade rubber comprising a binder containing a polycarbonate-based polyurethane resin and a solid lubricant.
- the present invention 2 relates to the coating agent for a wiper blade rubber according to the present invention 1, wherein the polycarbonate-based polyurethane resin is a crosslinked polycarbonate-based polyurethane resin and / or a non-crosslinked polycarbonate-based polyurethane resin.
- Invention 3 relates to the coating agent for wiper blade rubber according to Invention 1 or 2, wherein the weight ratio of solid content of binder to solid lubricant is 1: 1 to 1: 8.
- Invention 4 is the coating agent for wiper blade rubber according to any one of Inventions 1 to 3, wherein the solid lubricant is a graphite having an average particle diameter (D 50 ) of 2 to 15 ⁇ m measured by laser diffraction scattering method.
- D 50 average particle diameter
- the fifth invention relates to a coating agent for a wiper blade rubber according to any one of the first to fourth inventions, wherein the polycarbonate-based polyurethane resin is dispersed in an aqueous medium.
- Invention 6 has a tensile modulus of 20 MPa to 1300 MPa according to JIS K7161-1 of a film having a film thickness of 10 to 80 ⁇ m and a width of 3 to 20 mm, which is obtained by drying or curing the binder.
- the present invention relates to a coating for a wiper blade rubber according to any one of the present inventions 1 to 5.
- Invention 7 has a tensile strength of 35 MPa or more according to JIS K7311 of a film having a film thickness of 10 to 80 ⁇ m and a width of 3 to 20 mm formed by drying or curing the binder, and an elongation of 100% or more
- the present invention relates to a coating for a wiper blade rubber according to any one of the present inventions 1 to 6, which is
- the eighth aspect of the present invention relates to a wiper blade rubber provided with a coating layer comprising the coating agent for a wiper blade rubber according to any one of the first to seventh aspects on the side surface of the lip portion of the wiper blade rubber.
- the invention 9 relates to a wiper blade rubber according to the invention 8, wherein the thickness of the coating layer is 3 to 30 ⁇ m.
- a coating for a wiper blade rubber which has excellent friction performance and wiping performance in initial and long-term use and which suppresses wear and the like to provide excellent durability and a wiper blade using the same. Rubber can be provided.
- Sectional drawing of the wiper blade rubber which has a coating layer in a lip part The schematic diagram which represented the reference
- Example 1 The photograph which image
- Example 1 (a) Sectional drawing which represented typically the edge part of the lip
- Comparative example 1 or 2 (a) Cross-sectional view and (b) plan view schematically showing the end of the lip portion of the wiper blade rubber after the endurance test.
- Comparative example 2 The photograph which image
- the coating agent for wiper blade rubber of the present invention comprises a binder containing a polycarbonate-based polyurethane resin and a solid lubricant.
- the polycarbonate-based polyurethane resin contained in the binder is a polyurethane resin having a unit derived from a polycarbonate polyol, and is synthesized as a dispersion dispersed in an aqueous medium or a solution dissolved in an organic solvent.
- the polycarbonate-based polyurethane resin is a crosslinked polycarbonate-based polyurethane resin and / or a non-crosslinked polycarbonate-based polyurethane resin.
- the crosslinkable polycarbonate-based polyurethane resin is a polycarbonate-based polyurethane resin that crosslinks by application of energy.
- the energy to be given include radiation energy and thermal energy.
- radiation to impart radiation energy for example, infrared radiation, visible light, ultraviolet light, X-rays, electron beams, ⁇ -rays, ⁇ -rays, ⁇ -rays, etc. can be used.
- the amount of radiation energy is not particularly limited, and can be appropriately selected according to the type of radiation energy, but for example, 100 to 3000 mJ / cm 2 It is possible to irradiate the radiation energy to crosslink the polycarbonate-based polyurethane resin.
- the heating temperature is not particularly limited, but for example, the polycarbonate-based polyurethane resin may be heated to crosslink at a temperature of 50 to 200 ° C. It is possible.
- the crosslinkable polycarbonate polyurethane resin is preferably a thermally crosslinkable polycarbonate polyurethane resin which is heated at a temperature of 80 to 200 ° C. to form a urethane crosslink structure.
- the binder containing a crosslinkable polycarbonate-based polyurethane resin include ETERNACOLL (registered trademark) UW-1501F (manufactured by Ube Industries, Ltd.).
- the non-crosslinkable polycarbonate-based polyurethane resin is a polycarbonate-based polyurethane resin that does not crosslink even when energy is applied.
- a binder containing non-crosslinking type polycarbonate-based polyurethane resin for example, ETERNACOLL (registered trademark) UW-5002 (manufactured by Ube Industries, Ltd.) and the like can be mentioned.
- the mixing ratio of the two is not particularly limited.
- the binder contains a crosslinked polycarbonate-based polyurethane resin and a non-crosslinked polycarbonate-based polyurethane resin
- the mixing ratio of the crosslinkable polycarbonate polyurethane resin and the non-crosslinkable polycarbonate polyurethane resin can be appropriately set such that the tensile modulus of elasticity in accordance with K7161-1 becomes 20 MPa or more and 1300 MPa or less.
- the content of the polycarbonate-based polyurethane resin (solid content) in the binder is preferably 15 to 45% by mass, more preferably 20 to 40% by mass, based on the total amount (100% by mass) of the binder.
- the viscosity of the binder at 20 ° C. is preferably 10 to 200 mPa ⁇ s, more preferably 20 to 100 mPa ⁇ s.
- the viscosity of the binder can be measured, for example, using a tuning fork vibratory viscometer as described in the examples below.
- An aqueous medium is mentioned as a dispersion medium which disperse
- An organic solvent is mentioned as a solvent which dissolves polycarbonate system polyurethane resin. It is preferable to use an aqueous medium as the binder in consideration of emission control of VOC (volatile organic compound) and the like.
- the aqueous medium include water or a mixed medium of water and a hydrophilic organic solvent. Examples of water include ion-exchanged water, distilled water, ultrapure water and the like, but it is preferable to use ion-exchanged water in consideration of the stability of the dispersion and the like.
- hydrophilic organic solvents examples include lower monohydric alcohols such as methanol, ethanol and propanol; polyhydric alcohols such as ethylene glycol and glycerol; aprotics such as dimethyl sulfoxide, dimethylformamide, N-methyl pyrrolidone and N-ethyl pyrrolidone Hydrophilic organic solvents can be mentioned.
- the amount of the hydrophilic organic solvent in the aqueous medium is preferably 0 to 20% by mass, more preferably 0 to 10% by mass, based on 100% by mass of the aqueous medium.
- organic solvent for example, toluene, xylene, butyl acetate, dimethylformamide, dimethylacetamide, N-methylpyrrolidone, N-ethylpyrrolidone and the like can be used.
- the tensile modulus of the coating layer provided on the wiper blade rubber is affected by the binder contained in the wiper blade rubber coating.
- the tensile modulus of the binder can be measured using a film of a specific thickness and width obtained by drying or curing the binder contained in the wiper blade rubber coating.
- the coating layer becomes hard.
- the tensile elastic modulus of the film formed using the binder contained in the wiper blade rubber coating agent is small, the coating layer becomes soft.
- the hardness of the coating layer is usually the Martens hardness of the coating layer measured in accordance with ISO 14577-1. means that at Saga 20 N / mm 2 or more, the coating layer is soft, usually it means that the Martens hardness of the coating layer conforming to ISO14577-1 is less than 20 N / mm 2.
- the Martens hardness of the coating layer in accordance with ISO 14577-1 is referred to as “surface hardness”.
- the coating layer provided on the wiper blade rubber contains a binder containing a polycarbonate-based polyurethane resin and a solid lubricant, different numerical values are measured depending on the position at which the indenter and the sample abut the apparatus for measuring surface hardness. Therefore, the value of "surface hardness" becomes more stable as the number of times of measuring the surface hardness increases.
- the film obtained by drying or curing a binder containing a polycarbonate-based polyurethane resin and having a film thickness of 10 to 80 ⁇ m and a width of 3 to 20 mm preferably has a tensile modulus of 20 MPa to 1300 MPa according to JIS K7161-1. More preferably, it is 20 MPa or more and 1290 MPa or less, and still more preferably 25 MPa or more and 1280 MPa or less.
- the coating layer applied to the wiper blade rubber has a tensile modulus of 20 MPa or more and 1300 MPa or less according to JIS K 716 1 of a film of a specific size obtained by drying or curing a binder containing a polycarbonate-based polyurethane resin In a soft and well-expanded state, the ability to follow the curved glass surface is good, the occurrence of uneven wiping and the like can be suppressed, and a good wiping performance can be exhibited.
- the tensile modulus of elasticity of a film obtained by drying or curing a binder containing a polycarbonate-based polyurethane resin exceeds 1300 MPa according to JIS K7161-1, the film becomes too hard and is provided with a coating layer of a wiper blade rubber coating agent. The wiping performance of the wiper blade rubber may be reduced.
- the tensile modulus in accordance with JIS K7161-1 can be measured under the measurement conditions of a measurement temperature of 23 ° C., a humidity of 50%, and a tensile speed of 100 mm / min, as described in the examples to be described later. Since the coating layer applied to the wiper blade rubber contains a binder containing a polycarbonate-based polyurethane resin and a solid lubricant, the coefficient of friction and the wiping performance are also affected by the weight ratio of the solid content of the binder and the solid lubricant. Ru.
- Wiper such as chloroprene rubber and natural rubber with a tensile strength of 35 MPa or more and an elongation of 100% or more according to JIS K7311 of a film of a specific size obtained by drying or curing a binder containing a polycarbonate-based polyurethane resin
- the abrasion resistance of the coating layer consisting of the coating agent for the wiper blade rubber in close contact with the rubber constituting the base material of the blade rubber is improved, and the deformation of the base material can be followed, and cracking or peeling of the coating layer It can be suppressed.
- the tensile strength and the elongation based on JIS K7311 can be performed under the measurement conditions of a measurement temperature of 23 ° C., a humidity of 50%, and a tensile speed of 100 mm / min, as described in the examples to be described later.
- the solid lubricant is a self-lubricating solid material, and any known solid lubricant can be used.
- any known solid lubricant can be used.
- graphite graphite
- molybdenum disulfide molybdenum disulfide
- tungsten disulfide tungsten disulfide
- polytetrafluoroethylene PTFE
- silver, lead, copper and the like can be mentioned.
- graphite is preferred in order to reduce the coefficient of friction.
- the graphite is preferably scaly graphite.
- the particle size of the solid lubricant, the average particle diameter on a volume basis as measured by a laser diffraction scattering method (D 50) is preferably 2 ⁇ 15 [mu] m, more preferably 3 ⁇ 12 [mu] m, more preferably 3 ⁇ 10 [mu] m, particularly preferably Is 3.0 to 8.0 ⁇ m.
- a microtrack particle size distribution measuring apparatus MT3300 manufactured by Nikkiso Co., Ltd.
- the average particle size means the major axis.
- the mean particle size means the diameter.
- the coating agent for wiper blade rubber preferably has a weight ratio of solid content of binder to solid lubricant (solid content of binder: solid lubricant) of 1: 1 to 1: 8, more preferably 1 It is preferably in the range of 2: 2 to 1: 7, more preferably 1: 2 to 1: 6, and particularly preferably 1: 3 to 1: 6.
- the coating agent for the wiper blade rubber is a coating agent containing a binder containing a polyol polyether polyurethane resin, a chloroprene rubber, a chlorosulfone or a chlorosulfone by mixing a binder containing a polycarbonate polyurethane resin.
- the amount of solid lubricant can be increased and the coefficient of friction of the formed coating layer can be reduced as compared to a coating agent formulated with a binder containing polyethylene oxide and a phenolic resin. Further, even when the amount of solid lubricant in the coating agent is increased, the adhesion between the coating layer composed of the coating agent for the wiper blade rubber and the substrate is good, and even when the wiper blade is used for a long time, Wear of the coating layer can be suppressed.
- the coating agent for wiper blade rubber comprises a dispersion of a polycarbonate-based polyurethane resin dispersed in an aqueous medium or a solution in which an organic solvent is dissolved as a binder, and a solid lubricant is dispersed and mixed in this binder.
- a polycarbonate-based polyurethane resin dispersed in an aqueous medium or a solution in which an organic solvent is dissolved as a binder
- a solid lubricant is dispersed and mixed in this binder.
- It can be manufactured by A known method can be used as a method of dispersing and mixing the solid lubricant in the binder, and for example, it can be dispersed and mixed using a bead mill, a ball mill, a dissolver or the like.
- fillers, surfactants, dispersants, thickeners, preservatives and the like may be blended unless the problems and effects of the present invention are impaired.
- FIG. 1 is a cross-sectional view showing wiper blade rubbers formed in a tandem shape.
- the wiper blade rubber is molded in a tandem state in which the tips of the two wiper blade rubber substrates 1 are in contact with each other.
- the coating agent for a wiper blade rubber of the present invention is applied to both surfaces of the lip portion 2 of the wiper blade rubber substrate 1 and dried or cured to form a coating layer 3. Thereafter, the wiper blade rubber is cut at the center of the lip portion 2 (cut portion shown by reference numeral 4 in FIG. 1), the coating layer 3 is provided on both sides of the lip portion 2, and the rubber base is exposed at the end face of the lip portion Form
- Examples of the rubber constituting the wiper blade rubber base include rubbers such as natural rubber, styrene butadiene rubber, chloroprene rubber, ethylene-propylene-diene rubber (EPDM), ethylene propylene rubber and mixtures thereof. Also, depending on the application, resin elastomers can be used.
- a coating agent As a method of applying a coating agent, known methods such as spray coating, knife coating, roller coating, dipping and the like can be applied.
- the thickness of the coating layer is not particularly limited, but the thickness after drying or curing is preferably 3 to 30 ⁇ m, more preferably 3 to 15 ⁇ m, and still more preferably 5 to 12 ⁇ m.
- the thickness of the coating layer is 5 to 12 ⁇ m, the coefficient of friction can be reduced while securing the followability to the rubber substrate, and further, the wear can be suppressed to obtain excellent durability. .
- the thickness of the coating layer is less than 3 ⁇ m, the coefficient of friction can not be reduced, and the coating layer is easily broken during use, so that uneven wiping and the like can easily occur.
- the thickness of the coating layer exceeds 30 ⁇ m, the curved surface of the glass can not be followed, and unevenness in wiping and the like tends to occur.
- the tensile modulus, tensile strength and elongation dry or cure the binder to form a film having a thickness of 10 to 80 ⁇ m and a width of 5 mm, and for this film, the measurement temperature is 23 ° C., the humidity is 50%, and the tensile speed is 100 mm. / Minute, in accordance with JIS K7161-1 and JIS K7311.
- Binder A is a water-based polycarbonate-based polyurethane containing 30% by mass of a thermally crosslinkable polycarbonate-based polyurethane resin as a solid content with respect to the total amount (100% by mass) of the binder A, and containing water and N-methylpyrrolidone as a dispersion medium It is a resin dispersion (ETERNACOLL (registered trademark) UW-1501F (manufactured by Ube Industries, Ltd.)).
- ETERNACOLL registered trademark
- UW-1501F manufactured by Ube Industries, Ltd.
- the viscosity of binder A is shown in Table 1.
- the film comprising the binder A was formed by drying or curing the binder A to a film thickness of 10 to 80 ⁇ m and a width of 5 mm.
- the film made of the binder A was measured for tensile modulus in accordance with JIS K7161-1, and tensile strength and elongation were measured in accordance with JIS
- the binder B contains a resin dispersion B, a curing agent, and a dispersion medium.
- the resin dispersion liquid contained in the binder B, the curing agent, and the dispersion medium are shown below.
- the solid content of the binder B is 80% by mass with respect to the total amount (100% by mass) of the binder B.
- Resin dispersion B Propylene glycol monomethyl ether acetate containing 65 mass% of polyol polyether-based urethane resin (Nippolan (registered trademark) 179 P (manufactured by Nippon Polyurethane Industry Co., Ltd.) as solid content with respect to 100 mass% of resin dispersion) As a dispersion medium.
- the viscosity of the resin dispersion B is shown in Table 1.
- Curing agent Polyisocyanate resin / (CORONATE (registered trademark) 2513 (manufactured by Nippon Polyurethane Industry Co., Ltd.))
- Dispersion medium A film consisting of xylene / cellosolve acetate binder B was dried or cured to form a film thickness of 10 to 80 ⁇ m and a width of 5 mm. The film made of the binder B was measured for tensile modulus in accordance with JIS K7161-1, and tensile strength and elongation were measured in accordance with JIS K7311. The measurement results are shown in Table 1.
- the binder C is a rubber-based mixture containing 30% by mass of solid content and xylene as a dispersion medium based on the total amount (100% by mass) of the binder C (Shiprene (registered trademark) AD (manufactured by Showa Denko KK)) .
- the film made of the binder C was formed by drying or curing the binder C to have a film thickness of 10 to 80 ⁇ m and a width of 5 mm.
- the film made of the binder C was measured for tensile modulus in accordance with JIS K7161-1, and tensile strength and elongation were measured in accordance with JIS K7311. The measurement results are shown in Table 1.
- Solid lubricant Graphite (Average particle diameter based on volume by laser diffraction scattering method (Microtrac particle size distribution measuring device MT3300 (manufactured by Nikkiso Co., Ltd.)) (D50): 3.8 ⁇ m)
- Example 1 and Comparative Examples 1 and 2 The coating agents of Example 1 and Comparative Examples 1 and 2 were mixed with a binder, a solid lubricant, and other materials in a formulation shown in Table 2 using a homodisper stirrer to form a coating agent.
- the numerical value shown in Table 2 is a mass part except the weight ratio of solid content of a binder: lubricant.
- the solid lubricant was added little by little into the binder previously charged into the stirrer, and was stirred until there were no large particles visible visually and the individual particles were visually uniform in size. When the curing agent was used, it was added to the coating agent and mixed well immediately before application to the wiper blade.
- the obtained coating agent is applied to the lip portion 2 of the wiper blade rubber substrate 1 in a tandem shape as shown in FIG. 1 so that the film thickness of the coating layer 3 after drying or curing is 5 to 12 ⁇ m.
- the coating layer 3 was formed by drying at 130 to 140 ° C. for 0.5 hours. After forming the coating layer, the central portion of the lip portion 2 was cut to obtain a wiper blade rubber having the coating layer 3.
- the surface hardness was measured under the following conditions in accordance with ISO 14577-1. The results are shown in Table 2.
- the coating agent of Example or Comparative Example was applied to a test piece so that the coating layer had a thickness of 10 ⁇ m, and was used as a sample.
- One sample was tested 15 times or more under the following conditions, and S1 ⁇ ⁇ ⁇ S2 ⁇ ... ⁇ Sn was sequentially set from the largest measured value.
- n is the last measured value of the number of tests.
- the surface hardness was calculated based on the following equation (1) from these measured values.
- FIG. 2 is the schematic diagram which represented typically the reference
- the coating layer formed by the coating agent of Example 1 had a weight ratio of solid content of binder to solid lubricant of 1: 4, and was sufficiently flexible even if the content of solid lubricant in the coating agent was high. It could be confirmed that it had sex. It was confirmed that the wiper blade rubber provided with the coating layer formed by the coating agent of Example 1 had low friction at the beginning of use and that a good coating layer was formed. In addition, the wiper blade rubber provided with the coating layer formed of the coating agent of Example 1 has a change rate of the coefficient of friction after the endurance test with respect to the coefficient of friction in the initial stage of use It was confirmed that the change rate is small and the durability is excellent. Further, as shown in FIG.
- FIG. 4 represents typically the edge part of the wiper blade rubber after an endurance test, (a) Sectional drawing, (b) It is a top view. Even after the wiper blade rubber is used, when the coating layer is not worn, the coating layer 3 is present on the entire surface as shown in the plan view of FIG. 4 (b). In the photograph shown in FIG. 3, it can be confirmed that the coating layer 3 is present on the entire surface.
- the coating layer formed by the coating agent of Comparative Example 1 has a weight ratio of solid content of binder to solid lubricant of 1: 1, and although the content of solid lubricant is small, the surface hardness is 20 N / mm 2
- the coating layer was hard, and the friction coefficient at the beginning of use was relatively low.
- the wiper blade rubber provided with the coating layer formed of the coating agent of Comparative Example 1 has a large rate of change of the coefficient of friction after the endurance test of 1.48 in the early stage of use, is easily worn, and is durable Of Example 1 was inferior to that of Example 1.
- the coating layer of Comparative Example 1 had relatively poor followability to the wiping surface, and the score of the wiping evaluation was inferior to that of Example 1 on both the normal surface and the water repellent surface.
- FIG. 6 schematically shows an end portion of a wiper blade rubber provided with a coating layer formed by the coating agent of Comparative Example 1 or 2 after the endurance test, (a) a sectional view, (b) a plan view is there.
- a wiper blade rubber provided with a coating layer formed by the coating agent of Comparative Example 1 or 2 when the end of the coating layer 3 is worn after use, the cross-sectional view of FIG. 6 (a) and FIG.
- the wear portion 3 ' is formed as shown in the plan view of FIG. Also in the photograph shown in FIG. 5, it can be confirmed that the wear portion 3 'is present at the end of the coating layer 3.
- the coating layer formed by the coating agent of Comparative Example 2 has a weight ratio of solid content of the binder to solid lubricant of 1: 3.5, and the surface of the coating agent is high even if the content of solid lubricant is high.
- the hardness was less than 20 N / mm 2 , the coating layer was soft, and had low friction at the beginning of use. Also, the wiping performance was good.
- the wiper blade rubber provided with the coating layer formed of the coating agent of Comparative Example 2 has a very large rate of change of the coefficient of friction after the endurance test of 2.02 at the initial stage of use and is easily worn. The durability decreased.
- the wiper blade rubber was worn out of the coating layer due to the decrease of the solid lubricant after use, exposing the rubber substrate, deteriorating the wiping performance, and increasing the coefficient of friction. It could be inferred that the coating performance of the coating layer formed by the coating agent of Comparative Example 2 was affected by the content of the solid lubricant.
- the wiper blade rubber provided with the coating layer formed by the coating agent of Comparative Example 2 wears the coating layer 3 after use, and the wear portion 3 'is formed at the end of the coating layer 3 It can confirm that it exists.
- Binder D-1 to D-7 An aqueous polycarbonate-based polyurethane resin dispersion containing 30% by mass of a thermally crosslinkable polycarbonate-based polyurethane resin as a solid content, based on the total amount (100% by mass) of the binder, and water and N-methylpyrrolidone as a dispersion medium (Ube Kosan Co., Ltd.) was used.
- the binders D-1 to D-7 are a heat-crosslinking aqueous polycarbonate-based polyurethane resin dispersion.
- the sum of the content ratio of urethane bonds and the content ratio of urea bonds is 9.6 to 16 based on solid content. .7 mass%.
- the sum of the content ratio of urethane bonds and the content ratio of urea bonds of the aqueous polycarbonate-based polyurethane resin dispersion can be measured by the following method. The viscosities of these binders D-1 to D-7 are shown together in Table 4.
- Each film composed of the binders D-1 to D-7 was formed to a film thickness of 10 to 80 ⁇ m and a width of 5 mm by drying or curing the binders D-1 to D-7.
- the films made of the binders D-1 to D-7 were measured for tensile modulus in accordance with JIS K7161-1, and tensile strength and elongation were measured in accordance with JIS K7311. The measurement results are shown in Table 4.
- Binder E-1 to E-4 An aqueous polycarbonate-based polyurethane resin dispersion containing 30% by mass of a non-crosslinkable polycarbonate-based polyurethane resin as solid content and containing water and N-methylpyrrolidone as a dispersion medium based on the total amount (100% by mass) of the binder Kosan Co., Ltd.) was used.
- the binders E-1 to E-4 are non-crosslinked aqueous polycarbonate polyurethane resin dispersions.
- the sum of the content ratio of urethane bonds and the content ratio of urea bonds is 10.6 to 18 based on solid content. .6 mass%.
- the viscosities of these binders E-1 to E-4 are shown together in Table 5.
- the films comprising the binders E-1 to E-4 were formed by drying or curing the binders E-1 to E-4 to have a film thickness of 10 to 80 ⁇ m and a width of 5 mm.
- the films made of each of the binders E-1 to E-4 were measured for tensile modulus in accordance with JIS K7161-1, and tensile strength and elongation were measured in accordance with JIS K7311. The measurement results are shown in Table 5.
- Example 2 The coating agent of Example 2 contains binder D-1 and solid lubricant and other materials, and the weight ratio of solid content of binder D-1 to solid lubricant is 1: 1, 1: 2, 1: Each coating agent was manufactured in the same manner as in Example 1 except that the ratio was changed to 3, 1: 4, 1: 5, 1: 6, and mixing was carried out using a homodisper stirrer. Each coating agent has the same composition as in Example 1 except that the weight ratio of solid content of binder D-1 to solid lubricant is changed, and each coating agent is an aqueous medium (pure) 76. It contains 77 parts by mass, and a total of 23.23 parts by mass of binder D-1 and solid lubricant. A wiper blade rubber having a coating layer with a thickness of 5 to 12 ⁇ m was produced in the same manner as in Example 1 using each coating agent of Example 2.
- Examples 3 to 8 use binders D-2 to D-7, and the weight ratio of solid content of each binder D-2 to D-7 to solid lubricant is 1: 1, 1: 2, 1: Each coating agent was produced in each example in the same manner as in Example 2 except that the ratio was changed to 3, 1: 4, 1: 5, 1: 6. A wiper blade rubber having a coating layer having a thickness of 5 to 12 ⁇ m was produced in the same manner as Example 1 using these coating agents.
- Examples 9 to 12 use binders E-1 to E-4 and the weight ratio of solid content of each binder E-1 to E-4 to solid lubricant is 1: 1, 1: 2, 1: Each coating agent was produced in each example in the same manner as in Example 2 except that the ratio was changed to 3, 1: 4, 1: 5, 1: 6. A wiper blade rubber having a coating layer having a thickness of 5 to 12 ⁇ m was produced in the same manner as Example 1 using these coating agents.
- a wiper blade rubber using a coating agent containing a binder containing a crosslinkable polycarbonate polyurethane resin or a noncrosslinkable polycarbonate polyurethane resin and a solid lubricant has an initial and long length. Even in time use, it has excellent friction performance that can maintain low friction, and excellent wiping performance that can sufficiently suppress wiping noise, such as uneven wiping, etc. Confirming that it has excellent durability by suppressing wear and the like did it.
- Example 13 The coating agent of Example 13 uses binder D-4, and the weight ratio of binder D-4, solid lubricant and other materials, solid content of binder D-4 to solid lubricant is 1: Each coating agent was manufactured like Example 2 except having changed it into 7 and 1: 8. A wiper blade rubber having a coating layer having a thickness of 5 to 12 ⁇ m was produced in the same manner as Example 1 using these coating agents.
- Example 14 is the same as Example 2 except that the weight ratio of the solid content of the binder E-3 to the solid lubricant is changed to 1: 7, 1: 8 using the binder E-3. Each coating agent was manufactured. A wiper blade rubber having a coating layer having a thickness of 5 to 12 ⁇ m was produced in the same manner as Example 1 using these coating agents.
- Example 13 and Example 14 the content ratio of the solid lubricant and the solid content of the binder and the solid lubricant in the coating agent is 1: 7 and 1: 8, and the coefficient of friction change is 1. As compared with Examples 2 to 8 and Examples 9 to 12, the low friction property tends to be difficult to maintain, and the durability is slightly reduced.
- Binder F As the binder F, the following two aqueous polycarbonate-based polyurethane resin dispersions were used.
- the binder F has two aqueous polycarbonate-based polyurethane resin dispersions f-1 and f so that the film has a film thickness of 10 to 80 ⁇ m and a width of 15 mm made of the binder F and has a tensile modulus of 300 MPa according to JIS K7161-1. It was manufactured by mixing -2. The solid content of the binder F is 30% by mass. The binder F measured the viscosity. The film comprising the binder F was dried or cured to form a film having a thickness of 10 to 80 ⁇ m and a width of 15 mm. The film made of the binder F was measured for tensile modulus in accordance with JIS K7161-1 and tensile strength and elongation in accordance with JIS K7311. The measurement results are shown in Table 9.
- Example 15 manufactured the coating agent in an Example similarly to Example 2 except having set the weight ratio of solid content of the binder F and solid lubricant to 1: 4, using the binder F.
- a wiper blade rubber having a coating layer having a thickness of 5 to 12 ⁇ m was produced in the same manner as Example 1 using these coating agents.
- Example 15 With respect to the wiper blade rubber coating of Example 15 and the wiper blade rubber using the same, the surface hardness, the wiping evaluation (normal surface, water repellent surface), the coefficient of friction (initially, after the endurance test), the coefficient of friction change rate It was measured in the same manner as in Example 1.
- Table 9 shows the results of Example 15 using a binder containing a crosslinkable polycarbonate polyurethane resin and a noncrosslinkable polycarbonate polyurethane resin.
- a wiper blade rubber using a coating agent containing a binder containing a crosslinkable polycarbonate polyurethane resin and a noncrosslinkable polycarbonate polyurethane resin and a solid lubricant has an initial and long-term use Also in these cases, it was confirmed to have excellent friction performance capable of maintaining low friction, and excellent wiping performance capable of sufficiently suppressing wiping noise such as uneven wiping, and having excellent durability while suppressing abrasion and the like.
- the present invention has excellent friction performance that can maintain low friction even in initial and long-term use, and excellent wiping performance that can sufficiently suppress wiping noise such as uneven wiping, and suppresses wear and the like.
- a coating agent for a wiper blade rubber which imparts excellent durability and a wiper blade rubber using the same can be provided, which is industrially useful.
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Abstract
Description
本発明1は、ポリカーボネート系ポリウレタン樹脂を含むバインダーと、固体潤滑剤とを含むことを特徴とするワイパーブレードゴム用コーティング剤に関する。
本発明2は、ポリカーボネート系ポリウレタン樹脂が、架橋型のポリカーボネート系ポリウレタン樹脂及び/又は非架橋型のポリカーボネート系ポリウレタン樹脂である、本発明1記載のワイパーブレードゴム用コーティング剤に関する。
本発明3は、バインダーの固形分と固体潤滑剤の重量比が、1:1~1:8である、本発明1又は2記載のワイパーブレードゴム用コーティング剤に関する。
本発明4は、固体潤滑剤がレーザー回折散乱法により測定した平均粒子径(D50)が2~15μmのグラファイトである、本発明1~3のいずれか1に記載のワイパーブレードゴム用コーティング剤に関する。
本発明5は、ポリカーボネート系ポリウレタン樹脂が、水系媒体に分散されてなる、本発明1~4のいずれかに記載のワイパーブレードゴム用コーティング剤に関する。
本発明6は、バインダーが、バインダーを乾燥し又は硬化してなる、膜厚10~80μm、幅3~20mmのフィルムのJIS K7161-1に準拠した引張弾性率が20MPa以上1300MPa以下のものである、本発明1~5のいずれかに記載のワイパーブレードゴム用コーティング剤に関する。
本発明7は、バインダーが、バインダーを乾燥又は硬化してなる、膜厚10~80μm、幅3~20mmのフィルムのJIS K7311に準拠した引張強さが35MPa以上であり、かつ伸びが100%以上のものである、本発明1~6のいずれかに記載のワイパーブレードゴム用コーティング剤に関する。
本発明8は、本発明1~7のいずれかに記載のワイパーブレードゴム用コーティング剤からなるコーティング層を、ワイパーブレードゴムのリップ部の側面に備えたワイパーブレードゴムに関する。
本発明9は、前記コーティング層の厚さが3~30μmである、本発明8記載のワイパーブレードゴムに関する。
放射線エネルギーを付与する放射線としては、例えば赤外線、可視光線、紫外線、X線、電子線、α線、β線、γ線等が使用可能である。架橋型のポリカーボネート系ポリウレタンに放射線エネルギーを付与して架橋する場合、放射線エネルギーの量は特に限定されず、放射線エネルギーの種類に応じて適宜選択が可能であるが、例えば100~3000mJ/cm2の放射線エネルギーを照射してポリカーボネート系ポリウレタン樹脂を架橋することが可能である。また、熱架橋型のポリカーボネート系ポリウレタン樹脂に熱エネルギーを付与して架橋する場合、加熱する温度は特に限定されないが、例えば50~200℃の温度でポリカーボネート系ポリウレタン樹脂を加熱して架橋することが可能である。架橋型のポリカーボネート系ポリウレタン樹脂は、80~200℃の温度で加熱されてウレタン架橋構造を形成する熱架橋型のポリカーボネート系ポリウレタン樹脂であることが好ましい。架橋型のポリカーボネート系ポリウレタン樹脂を含むバインダーとしては、例えばETERNACOLL(登録商標)UW-1501F(宇部興産社製)等が挙げられる。
水としては、例えば、イオン交換水、蒸留水、超純水等が挙げられるが、分散体の安定性等を考慮してイオン交換水を使用することが好ましい。
親水性有機溶媒としては、メタノール、エタノール、プロパノール等の低級1価アルコール、エチレングリコール、グリセリン等の多価アルコール;ジメチルスルホキシド、ジメチルホルムアミド、N-メチルピロリドン、N-エチルピロリドン等の非プロトン性の親水性有機溶媒が挙げられる。
水系媒体中の親水性有機溶媒の量としては、水系媒体を100質量%としたときに、好ましくは0~20質量%、より好ましくは0~10質量%である。
有機溶剤としては、例えば、トルエン、キシレン、酢酸ブチル、ジメチルホルムアミド、ジメチルアセトアミド、N-メチルピロリドン、N-エチルピロリドン等を使用することができる。
ポリカーボネート系ポリウレタン樹脂を含むバインダーを乾燥し又は硬化してなる特定の大きさのフィルムのJIS K7161-1に準拠した引張弾性率が20MPa以上1300MPa以下であると、ワイパーブレードゴムに適用したコーティング層が柔らかくよく伸びる状態となり、ガラス曲面への追従性が良好であり、拭きムラ等の発生を抑制し、良好な払拭性能を発揮することができる。
ポリカーボネート系ポリウレタン樹脂を含むバインダーを乾燥し又は硬化してなるフィルムのJIS K7161-1に準拠した引張弾性率が20MPa未満であると、ワイパーブレードゴム用コーティング剤からなるコーティング層を備えたワイパーブレードゴムの摩擦係数を十分に小さくできない場合がある。ポリカーボネート系ポリウレタン樹脂を含むバインダーを乾燥し又は硬化してなるフィルムのJIS K7161-1に準拠した引張弾性率が1300MPaを超えると、硬くなりすぎて、ワイパーブレードゴム用コーティング剤からなるコーティング層を備えたワイパーブレードゴムの拭き性能が低下する場合がある。
JIS K7161-1に準拠した引張弾性率は、後述する実施例において説明するように、測定温度23℃、湿度50%、引張速度100mm/分の測定条件で行うことができる。
ワイパーブレードゴムに適用したコーティング層は、ポリカーボネート系ポリウレタン樹脂を含むバインダーと、固体潤滑剤とを含むものであるため、バインダーの固形分と固体潤滑剤の重量比によっても、摩擦係数や払拭性能は影響される。
ポリカーボネート系ポリウレタン樹脂を含むバインダーを乾燥し又は硬化してなる特定の大きさのフィルムのJIS K7311に準拠した引張強さが35MPa以上かつ伸びが100%以上であると、クロロプレンゴム、天然ゴムといったワイパーブレードゴムの基材を構成するゴムと密着させたワイパーブレードゴム用コーティング剤からなるコーティング層の耐摩耗性が良好になり、基材の変形に追従することができ、コーティング層の亀裂や剥離を抑制することができる。
JIS K7311に準拠した引張強さかつ伸びは、後述する実施例において説明するように、測定温度23℃、湿度50%、引張速度100mm/分の測定条件で行うことができる。
本発明によれば、ワイパーブレードゴム用コーティング剤は、ポリカーボネート系ポリウレタン樹脂を含むバインダーを配合することによって、ポリオールポリエーテル系ポリウレタン樹脂を含むバインダーを配合したコーティング剤や、クロロプレンゴム系もしくクロロスルホン化ポリエチレンとフェノール樹脂を含むバインダーを配合したコーティング剤と比較して、固体潤滑剤の量を増量することができ、成形されたコーティング層の摩擦係数を小さくすることができる。また、コーティング剤中の固体潤滑剤を増量した場合であっても、ワイパーブレードゴム用コーティング剤からなるコーティング層と基材の密着性が良好であり、かつ長時間のワイパーブレードの使用においても、コーティング層の摩耗を抑制することができる。
バインダーの固形分と固体潤滑剤の重量比(バインダーの固形分:固体潤滑剤)が1:1~1:8であり、特に1:2~1:7であると、初期及び長時間の使用において優れた摩擦性能及び払拭性能を有し、基材への密着性が優れ、摩耗を抑制して優れた耐久性を有するワイパーブレード用のコーティング層を形成することができる。このワイパーブレード用コーティング剤からなるコーティング層を備えたワイパーブレードゴムは、優れた摩耗性、払拭性及び耐久性を有する。
図1は、タンデム形状に形成されたワイパーブレードゴムを示す断面図である。
ワイパーブレードゴムは、2つのワイパーブレードゴム基材1の先端部同士が当接しているタンデム状態で成形される。このワイパーブレードゴム基材1のリップ部2の両面に、本発明のワイパーブレードゴム用コーティング剤を塗布し、乾燥又は硬化して、コーティング層3を形成する。その後、リップ部2の中央(図1の符号4で図示する切断部)で切断し、リップ部2の両面にコーティング層3を有し、リップ部の端面にゴム基材が露出したワイパーブレードゴムを形成する。
粘度は23℃における、音叉型振動式粘度計装置を用いて測定した。
引張弾性率、引張強さ及び伸びは、バインダーを乾燥し又は硬化して、膜厚10~80μm、幅5mmのフィルムを形成し、このフィルムについて、測定温度23℃、湿度50%、引張速度100mm/分にて、JIS K7161-1及びJIS K7311に準拠して測定した。
バインダーAは、バインダーAの全量(100質量%)に対して、熱架橋型のポリカーボネート系ポリウレタン樹脂を固形分として30質量%含み、分散媒体として水及びN-メチルピロリドンを含む、水系ポリカーボネート系ポリウレタン樹脂分散体(ETERNACOLL(登録商標)UW-1501F(宇部興産社製))である。バインダーAの粘度は、表1に示す。バインダーAからなるフィルムは、バインダーAを乾燥し又は硬化して膜厚10~80μm、幅5mmに形成した。バインダーAからなるフィルムは、JIS K7161-1に準拠して引張弾性率を測定し、JIS K7311に準拠して、引張強さ及び伸びを測定した。測定結果は、表1に示す。
バインダーBは、樹脂分散液Bと、硬化剤と、分散媒体とを含む。バインダーBに含まれる樹脂分散液と、硬化剤と、分散媒体を以下に示す。バインダーBの固形分は、バインダーBの全量(100質量%)に対して、80質量%である。
樹脂分散液B:樹脂分散液100質量%に対して、ポリオールポリエーテル系ウレタン樹脂(ニッポラン(登録商標)179P(日本ポリウレタン工業社製))を固形分として65質量%含み、プロピレングリコールモノメチルエーテルアセテートを分散媒体として含む。樹脂分散液Bの粘度は、表1に示す。硬化剤:ポリイソシアネート樹脂/(コロネート(登録商標)2513(日本ポリウレタン工業社製))
分散媒体:キシレン/酢酸セロソルブ
バインダーBからなるフィルムは、バインダーBを乾燥し又は硬化して膜厚10~80μm、幅5mmに形成した。バインダーBからなるフィルムは、JIS K7161-1に準拠して引張弾性率を測定し、JIS K7311に準拠して、引張強さ及び伸びを測定した。測定結果は、表1に示す。
バインダーCは、バインダーCの全量(100質量%)に対して、固形分30質量%と、分散媒体としてキシレンを含む、ゴム系混合物である(ショウプレン(登録商標)AD(昭和電工社製))。バインダーCからなるフィルムは、バインダーCを乾燥し又は硬化して膜厚10~80μm、幅5mmに形成した。バインダーCからなるフィルムは、JIS K7161-1に準拠して引張弾性率を測定し、JIS K7311に準拠して引張強さ及び伸びを測定した。測定結果は、表1に示す。
グラファイト(レーザー回折散乱式法(マイクロトラック粒度分布測定装置MT3300(日機装社製))による体積基準の平均粒子径(D50):3.8μm)
実施例1及び比較例1~2のコーティング剤は、バインダーと、固体潤滑剤及びその他の材料とを、表2に示す配合でホモディスパー撹拌機を用いて混合し、コーティング剤とした。なお、バインダーの固形分:潤滑剤の重量比を除き、表2に示す数値は、質量部である。固体潤滑剤は、先に撹拌機中に投入したバインダー中に少量ずつ加え、目視で目立つ大きな粒子がなく、目視で個々の粒子が略均一な大きさになるまで撹拌した。硬化剤を用いる場合には、ワイパーブレードに塗布直前に、コーティング剤に加えてよく混合した。
ISO14577-1に準拠して、以下の条件で表面硬さを測定した。結果を表2に示す。テストピースに、実施例又は比較例のコーティング剤を、コーティング層が10μmの厚さになるように塗布し、試料とした。1つの試料に対して、下記の条件で15回以上試験を行い、測定値の大きな値から順にそれぞれS1≧S2≧・・・≧Snとした。ここで、nは、試験回数の最後の測定値である。
これら測定値から下記式(1)に基づき表面硬さを算出した。
表面硬さ=0.5×S1+0.3×S2+0.1×(S3~Snの和)・・・(2)
試験温度:23℃
湿度:50%
装置:ダイナミック超微小硬度計 DUH-211S 島津製作所社製
試験条件:最小試験力0.08mN、負荷速度0.146mN/sec、負荷保持時間5sec、設定押し込み深さ2μmテストピース:基材SUS304
コーティング層:10μm
拭き性能に関する官能評価は、実施例1及び比較例1~2のコーティング剤により成形されたコーティング層を設けたワイパーブレードゴムを普通自動車のワイパー装置に取り付け、当該普通自動車のウインドシールドガラス面に毎分約100~500mlの水を払拭面全体に万遍なく散布した状態で、ワイパー装置にて払拭動作を行い、拭き下げ時に残ったスジの状態をウインドシールドガラス面の室内側から観察し、後述する評価点の基準に従い、拭き評価を行った。なお、払拭試験前に、ウインドシールドガラス面を清掃して、ワックスやコーティング剤を除去したガラス面を通常面とし、市販の自動車ウインドシールドガラス用撥水剤(タクティー社製 ドライブジョイ(Drive Joy(登録商標))業務用ガラスコートセット)を当該撥水剤の説明書に従って撥水剤被膜をコーティングした状態のガラス面を撥水面とした。図2は、官能評価の点数の基準を模式的表した模式図である。
評価点:5 スジが全く発生しない。
評価点:4 瞬間的にスジが発生し直ぐに消える。
評価点:3 部分的にスジが発生し直ぐに消える。
評価点:2 部分的にスジが発生し直ぐに消えない。
評価点:1 全面にスジが発生し直ぐに消えない。
また、実施例1及び比較例1~2のコーティング剤により成形されたコーティング層を設けたワイパーブレードゴムについて、普通自動車用フロントガラス面をドライ状態として、SAE J903に基づくワイパーブレードシステムの耐久試験を行い、試験初期の摩擦係数(初期)と耐久試験後の摩擦係数(耐久試験後)を測定した。摩擦係数変化率は、使用初期の摩擦係数に対する耐久試験後の摩擦係数の変化率(耐久試験後の摩擦係数/使用初期の摩擦係数)を算出した。
また、当該試験後の実施例1及び比較例1~2のコーティング剤により成形されたコーティング層を設けたワイパーブレードゴムのリップ部の側面をデジタルマイクロスコープ写真(200倍率)で撮影した。結果を図3、5及び7に示す。
実施例1のコーティング剤により成形されたコーティング層は、バインダーの固形分と固体潤滑剤の重量比が1:4であり、コーティング剤中の固体潤滑剤の含有量が多くても、十分な柔軟性を有していることが確認できた。実施例1のコーティング剤により成形されたコーティング層を設けたワイパーブレードゴムは、使用初期において、低摩擦であり、良好なコーティング層が形成されていることが確認できた。また、実施例1のコーティング剤により形成されたコーティング層を設けたワイパーブレードゴムは、使用初期の摩擦係数に対する耐久試験後の摩擦係数の変化率(耐久試験後の摩擦係数/使用初期の摩擦係数)が1.11と変化率が小さく耐久性に優れていることが確認できた。また、このワイパーブレードゴムは、図3に示すように、使用後において、コーティング層3が摩耗しておらず、良好な払拭性を維持していることが確認できた。図4は、耐久試験後のワイパーブレードゴムの端部を模式的に表し、(a)断面図、(b)平面図である。ワイパーブレードゴムが使用後においても、コーティング層が摩耗していない場合には、図4(b)の平面図に示すように、全面的にコーティング層3が存在する。図3に示す写真において、全面的にコーティング層3が存在していることを確認できる。
バインダーの全量(100質量%)に対して、熱架橋型のポリカーボネート系ポリウレタン樹脂を固形分として30質量%含み、分散媒体として水及びN-メチルピロリドンを含む、水性ポリカーボネート系ポリウレタン樹脂分散体(宇部興産社製)を用いた。バインダーD-1~D-7は、熱架橋型の水性ポリカーボネート系ポリウレタン樹脂分散体である。バインダーD-1~D-7に用いた各水性ポリカーボネート系ポリウレタン樹脂分散体は、表4に示すとおり、ウレタン結合の含有割合とウレア結合の含有割合の合計が固形分基準で9.6~16.7質量%である。本明細書において、水性ポリカーボネート系ポリウレタン樹脂分散体のウレタン結合の含有割合とウレア結合の含有割合の合計は、下記の方法によって測定できる。これらのバインダーD-1~D-7の粘度は、表4に併せて示す。バインダーD-1~D-7の各バインダーからなる各フィルムは、バインダーD-1~D-7を乾燥又は硬化して膜厚10~80μm、幅5mmに形成した。バインダーD-1~D-7の各バインダーからなるフィルムは、JIS K7161-1に準拠して引張弾性率を測定し、JIS K7311に準拠して引張強さ及び伸びを測定した。測定結果は表4に示す。
水性ポリカーボネート系ポリウレタン樹脂分散体をガラス板に塗布し、乾燥させた後、100mgを秤量し、一定量の外部標準物質と共に、重ジメチルスルホキシド0.75mLに溶かし、1H-NMRを測定し、1H-NMRのピークから水性ポリカーボネート系ポリウレタン樹脂分散体のウレタン結合の含有割合とウレア結合の含有割合の合計を固形分に基づき算出した。なお、外部標準物質は、各水性ポリカーボネート系ポリウレタン樹脂のピークと重ならない物質を一般的に用いられる外部標準物質中からその都度選んで用いた。
バインダーの全量(100質量%)に対して、非架橋型のポリカーボネート系ポリウレタン樹脂を固形分として30質量%含み、分散媒体として水及びN-メチルピロリドンを含む、水性ポリカーボネート系ポリウレタン樹脂分散体(宇部興産社製)を用いた。バインダーE-1~E-4は、非架橋型の水性ポリカーボネート系ポリウレタン樹脂分散体である。バインダーE-1~E-4に用いた各水性ポリカーボネート系ポリウレタン樹脂分散体は、表5に示すとおり、ウレタン結合の含有割合とウレア結合の含有割合の合計が固形分基準で10.6~18.6質量%である。これらのバインダーE-1~E-4の粘度は、表5に併せて示す。バインダーE-1~E-4の各バインダーからなるフィルムは、バインダーE-1~E-4を乾燥又は硬化して膜厚10~80μm、幅5mmに形成した。バインダーE-1~E-4の各バインダーからなるフィルムは、JIS K7161-1に準拠して引張弾性率を測定し、JIS K7311に準拠して引張強さ及び伸びを測定した。測定結果は表5に示す。
実施例2のコーティング剤は、バインダーD-1と、固体潤滑剤及びその他の材料とを、バインダーD-1の固形分と固体潤滑剤との重量比を1:1、1:2、1:3、1:4、1:5、1:6と変化させ、ホモディスパー撹拌機を用いて混合し、その他の製造方法は、実施例1と同様にして、各コーティング剤を製造した。各コーティング剤は、バインダーD-1の固形分と固体潤滑剤との重量比を変化させたこと以外は、実施例1と同様の配合であり、各コーティング剤は、水系媒体(純粋)76.77質量部を含み、バインダーD-1及び固体潤滑剤の合計23.23質量部を含む。実施例2の各コーティング剤を用いて、膜厚が5~12μmのコーティング層を有するワイパーブレードゴムを、実施例1と同様にして製造した。
実施例3~8は、バインダーD-2~D-7を用いて、各バインダーD-2~D-7の固形分と固体潤滑剤との重量比を1:1、1:2、1:3、1:4、1:5、1:6と変化させたこと以外は、実施例2と同様にして、各実施例において各コーティング剤を製造した。これらのコーティング剤を用いて、膜厚が5~12μmのコーティング層を有するワイパーブレードゴムを、実施例1と同様にして製造した。
実施例9~12は、バインダーE-1~E-4を用いて、各バインダーE-1~E-4の固形分と固体潤滑剤との重量比を1:1、1:2、1:3、1:4、1:5、1:6と変化させたこと以外は、実施例2と同様にして、各実施例において各コーティング剤を製造した。これらのコーティング剤を用いて、膜厚が5~12μmのコーティング層を有するワイパーブレードゴムを、実施例1と同様にして製造した。
実施例13のコーティング剤は、バインダーD-4を用いて、バインダーD-4と、固体潤滑剤及びその他の材料とを、バインダーD-4の固形分と固体潤滑剤との重量比を1:7、1:8と変化させたこと以外は、実施例2と同様にして、各コーティング剤を製造した。これらのコーティング剤を用いて、膜厚が5~12μmのコーティング層を有するワイパーブレードゴムを、実施例1と同様にして製造した。
実施例14は、バインダーE-3を用いて、バインダーE-3の固形分と固体潤滑剤との重量比を1:7、1:8と変化させたこと以外は、実施例2と同様にして、各コーティング剤を製造した。これらのコーティング剤を用いて、膜厚が5~12μmのコーティング層を有するワイパーブレードゴムを、実施例1と同様にして製造した。
バインダーFは、下記の2つの水系ポリカーボネート系ポリウレタン樹脂分散体を用いた。
(1)水系ポリカーボネート系ポリウレタン樹脂分散体f-1
樹脂分散体100質量%に対して、熱架橋型のポリカーボネート系ポリウレタン樹脂を固形分として30質量%含み、分散媒体として水及びN-メチルピロリドンを含む、水系ポリカーボネート系ポリウレタン樹脂分散体(ETERNACOLL(登録商標)UW-1501F(宇部興産社製))を用いた。
(2)水系ポリカーボネート系ポリウレタン樹脂分散体f-2
樹脂分散体100質量%に対して、非架橋型のポリカーボネート系ポリウレタン樹脂を固形分として30質量%含み、分散媒体として水及びN-メチルピロリドンを含む、水系ポリカーボネート系ポリウレタン樹脂分散体(ETERNACOLL(登録商標)UW-5002(宇部興産社製))を用いた。
バインダーFは、バインダーFからなる膜厚10~80μm、幅15mmのフィルムのJIS K7161-1に準拠した引張弾性率が300MPaとなるように、2つの水系ポリカーボネート系ポリウレタン樹脂分散体f-1及びf-2を混合して製造した。バインダーFの固形分量は、30質量%である。バインダーFは、粘度を測定した。バインダーFからなるフィルムは、バインダーFを乾燥又は硬化して膜厚10~80μm、幅15mmのフィルムを形成した。バインダーFからなるフィルムは、JIS K7161-1に準拠して引張弾性率、JIS K7311に準拠して引張強さ及び伸びを測定した。測定結果は表9に示す。
実施例15は、バインダーFを用いて、バインダーFの固形分と固体潤滑剤との重量比を1:4したこと以外は、実施例2と同様にして、実施例におけるコーティング剤を製造した。これらのコーティング剤を用いて、膜厚が5~12μmのコーティング層を有するワイパーブレードゴムを、実施例1と同様にして製造した。
2 リップ部
3 コーティング層
3’ 摩耗部
4 切断部
Claims (9)
- ポリカーボネート系ポリウレタン樹脂を含むバインダーと、固体潤滑剤とを含むことを特徴とするワイパーブレードゴム用コーティング剤。
- ポリカーボネート系ポリウレタン樹脂が、架橋型のポリカーボネート系ポリウレタン樹脂及び/又は非架橋型のポリカーボネート系ポリウレタン樹脂である、請求項1記載のワイパーブレードゴム用コーティング剤。
- バインダーの固形分と固体潤滑剤の重量比が、1:1~1:8である、請求項1又は2記載のワイパーブレードゴム用コーティング剤。
- 固体潤滑剤がレーザー回折散乱法により測定した平均粒子径(D50)が2~15μmのグラファイトである、請求項1~3のいずれか1項記載のワイパーブレードゴム用コーティング剤。
- ポリカーボネート系ポリウレタン樹脂が、水系媒体に分散されてなる、請求項1~4のいずれか1項記載のワイパーブレードゴム用コーティング剤。
- バインダーが、バインダーを乾燥し又は硬化してなる、膜厚10~80μm、幅3~20mmのフィルムのJIS K7161-1に準拠した引張弾性率が20MPa以上1300MPa以下のものである、請求項1~5のいずれか1項記載のワイパーブレードゴム用コーティング剤。
- バインダーが、バインダーを乾燥又は硬化してなる、膜厚10~80μm、幅3~20mmのフィルムのJIS K7311に準拠した引張強さが35MPa以上であり、かつ伸びが100%以上のものである、請求項1~6のいずれか1項記載のワイパーブレードゴム用コーティング剤。
- 請求項1~7のいずれか1項記載のワイパーブレードゴム用コーティング剤からなるコーティング層を、ワイパーブレードゴムのリップ部の側面に備えたワイパーブレードゴム。
- 前記コーティング層の厚さが3~30μmである、請求項8記載のワイパーブレードゴム。
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KR1020167008188A KR20160090788A (ko) | 2013-11-27 | 2014-11-27 | 와이퍼 블레이드 고무용 코팅제, 및 그것을 사용한 와이퍼 블레이드 고무 |
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US10071711B2 (en) | 2018-09-11 |
JP6482472B2 (ja) | 2019-03-13 |
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US20160272158A1 (en) | 2016-09-22 |
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CN105793369B (zh) | 2019-09-27 |
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