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
  • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
  • C09D5/02—Emulsion paints including aerosols
• • 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
  • C08G18/83—Chemically modified polymers
  • C08G18/837—Chemically modified polymers by silicon containing compounds
• • 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
• • 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
• • 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
  • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
  • C08G18/72—Polyisocyanates or polyisothiocyanates
  • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
  • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
• • 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
  • C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
  • C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxyl groups
• • 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
• • 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
  • C09D183/00—Coating compositions based on 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; Coating compositions based on derivatives of such polymers
  • C09D183/04—Polysiloxanes
• • 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
  • C09D5/02—Emulsion paints including aerosols
  • C09D5/024—Emulsion paints including aerosols characterised by the 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
  • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
  • C09D5/08—Anti-corrosive paints
• • 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
  • C09D7/60—Additives non-macromolecular
  • C09D7/63—Additives non-macromolecular organic
• • 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
  • C09D7/65—Additives macromolecular
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D2201/00—Polymeric substrate or laminate
  • B05D2201/02—Polymeric substrate
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05D2202/00—Metallic substrate
• • 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
  • C08G2150/00—Compositions for coatings
  • C08G2150/90—Compositions for anticorrosive coatings

Definitions

• the present invention relates to an aqueous surface treatment agent. More specifically, the present invention relates to an aqueous surface treatment agent having salt water corrosion resistance and being effectively applied to an aluminum base material or the like.
• surface treatment such as alumite treatment, corrosion prevention coating treatment, and plating treatment is generally performed on the aluminum side.
• Patent Document 1 A specific aluminum alloy material in which a fluororesin coating having an average thickness of 1 to 100 ⁇ m after drying is directly provided on the surface without providing a coating base film, and the surface of the alloy material by X-ray photoelectron spectroscopy.
• Patent Document 2 A method for improving the corrosion resistance of a non-stick coating on a base material.
• Patent Document 3 A coating layer composed of a nitride material selected from the group consisting of CrN, TiN, AlN, BN, BCN and AlBN and DLC or TiC containing hydrogen on the surface of the magnetic substrate in contact with seawater. A magnetic material for seawater resistance, wherein the coating layer is composed of one layer or two or more coating layers.
• this aqueous surface treatment agent has excellent durability because it does not bleed the oil content and improves the adhesion to the substrate. Adhesion between rubber materials such as O-rings or against metals, resins, etc. is effectively prevented. Further, it has an excellent effect of reducing friction when the rubber or resin sealing member is slid.
• Japanese Unexamined Patent Publication No. 2008-267781 Special Table 2009-504386 Gazette JP-A-2010-177326 WO2009 / 047938 A1 Japanese Unexamined Patent Publication No. 7-23347 Japanese Unexamined Patent Publication No. 2006-299274 Japanese Unexamined Patent Publication No. 2005-125656
• An object of the present invention is the resistance of an aluminum base material of an aqueous surface treatment agent containing a silicone oil for preventing adhesion between products and a silanol-modified polyurethane resin binder having a low hardness and good adhesion to a sealing member.
• the purpose is to improve the corrosiveness.
• An object of the present invention is (A) an aqueous emulsion of silicone oil, (B) a silanol-modified polyurethane resin, (C) a silane compound and / or a partial hydrolyzate thereof, (D) hydrazides and a carbonyl group-containing polyurethane resin.
• Thermal softening temperature observed when the temperature is raised from 40 ° C to 150 ° C at a heating rate of 5 ° C / min using an aqueous emulsion and (E) -30 ° C or lower glass transition point and using a flow tester. Is achieved by an aqueous surface treatment agent consisting of an aqueous emulsion of a polyurethane resin having a temperature of 70 ° C. or lower.
• the coating film hardness of the water-based surface treatment agent is soft, the sealing property to the aluminum base material etc. is improved and the corrosion prevention function is improved.
• This corrosion prevention function is achieved by the coating film applied to the surface of the sealing member following the surface of the aluminum base material which is the mating material and improving the sealing property.
• the aqueous surface treatment agent is (A) an aqueous emulsion of silicone oil, (B) a silanol-modified polyurethane resin, (C) a silane compound and / or a partial hydrolyzate thereof, (D) an aqueous emulsion of hydrazides and a carbonyl group-containing polyurethane resin.
• the heat softening temperature observed when the emulsion and (E) have a glass transition point of -30 ° C or less and are heated from 40 ° C to 150 ° C using a flow tester at a heating rate of 5 ° C / min. It is composed of an aqueous emulsion of a polyurethane resin having a temperature of 70 ° C. or lower, and a polyurethane resin having a thermal softening temperature of 70 ° C. or lower is used as a solid content weight of 100 parts by weight or more with respect to 100 parts by weight of a non-volatile content of silicone oil
• the solid content ratio of the raw material containing Si / the raw material containing urethane bond is 0.5 to 1.0.
• Aqueous surface treatment agents containing silanol-modified polyurethane binder having low hardness and good adhesion to sealing members and silicone oil for preventing adhesion between products include the following (A), (B), and (C). ), (D), (E) Aqueous dispersions or aqueous solutions of each component are used.
• the silicone oil of component (A) used as an aqueous emulsion has a kinematic viscosity at 25 ° C. of about 50 to 1,000,000 mm 2 / sec, preferably about 500 to 200,000 mm 2 / sec, and at least one bonded to a silicon atom.
• An organopolysiloxane having an organic group is used, and the molecular structure thereof may be linear, branched, or networked, but a linear or branched one is preferable, and a linear one is more preferable. Used.
• Organic groups bonded to silicon atoms in organopolysiloxane include alkyl groups such as methyl, ethyl, propyl, butyl and hexyl groups, alkenyl groups such as vinyl and propenyl groups, and phenyl groups. Examples thereof include an aralkyl group such as an aryl group and a phenethyl group, and a part of the hydrogen atom of these hydrocarbon groups substituted with a halogen atom, a nitrile group and the like.
• Examples of the terminal organic group of the organopolysiloxane include a methyl group, an amino group, an epoxy group, a carbinol group, a hydroxyl group, a methoxy group, a metharoxy group, a carboxyl group, a silanol group, an alkoxy group and the like, and a carbinol group and a hydroxyl group are preferable.
• Silicone oil imparts lubricity, low friction and non-adhesiveness to the surface treatment coating.
• aqueous emulsion using these silicone oils in addition to the hydrophilic silicone oil aqueous emulsion, a forced emulsification type silicone oil aqueous emulsion using an emulsifier can also be used, and the dispersion method thereof is not particularly limited.
• a silicone oil aqueous emulsion one having a silicone oil content (nonvolatile content) of about 3 to 60% by weight is used.
• a predetermined amount of (B) silanol-modified polyurethane resin aqueous emulsion is added to the silicone oil aqueous emulsion.
• the aqueous emulsion of the silanol-modified polyurethane resin is an aqueous dispersion containing a silanol group in the polyurethane structure, and the silanol groups are crosslinked by a condensation reaction to form a siloxane bond. Since this siloxane bond is more stable than the bond formed by other urethanization cross-linking reactions, it has an effect that the solvent resistance of the obtained surface treatment film is good.
• the urethane resin aqueous emulsion imparts sliding durability to the surface-treated film, and further incorporates silicone oil to impart lubricity, low friction, and non-adhesiveness to the surface-treated film without bleeding the oil component.
• silicone oil to impart lubricity, low friction, and non-adhesiveness to the surface-treated film without bleeding the oil component.
• silanol-modified polyurethane resin aqueous emulsion one having a resin solid content concentration of about 10 to 70% by weight is used.
• the silane compound retains the silicone oil in the surface treatment film by reacting with the reactive organic group of the silicone emulsion and the alkoxy group of the above-mentioned specific silane compound, and has low surface lubricity without bleeding the oil component. It is a component that develops friction and non-adhesiveness, reacts with an aqueous emulsion of a polyurethane resin, improves the affinity between the silicone oil and the crosslinked polyurethane resin, and has the effect of retaining the silicone oil in the surface treatment film. In addition, it has a function of imparting an improvement in coatability to the base material to be surface-treated.
• silane compounds include ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropyltriethoxysilane, ⁇ -glycidoxypropyltripropoxysilane, ⁇ -glycidoxypropylmethyldimethoxysilane, and ⁇ -gly.
• the partial hydrolyzate of these silane compounds can also be used.
• the hydrolyzate can be obtained by subjecting one or a mixture of two or more silane compounds to a condensation reaction under hydrolysis conditions according to the type of silane compound.
• the silane compound is preferably blended in a ratio of 10 to 60 parts by weight with respect to 100 parts by weight of the oil content (nonvolatile content) of the silicone oil emulsion. If the silane compound is used in a higher proportion, the coefficient of friction will increase and the durability will decrease, while if it is used in a lower proportion, excessive oil bleeding will occur.
• Examples of the aqueous emulsion containing (D) hydrazides and a carbonyl group-containing polyurethane resin include aqueous emulsions of hydrazides and a carbonyl group-containing polyurethane-vinyl-hybrid polymer as described in Patent Documents 5 to 6. It is crosslinked by the azomethine bond obtained by the reaction of hydrazides with the carbonyl group of the polyurethane-vinyl-hybrid polymer. In this case, in general, these compounds are used at a ratio of the number of hydrazine groups to the number of carbonyl groups being 1:40 to 2: 1.
• Hydrazides include low molecular weight aliphatic compounds, aromatic compounds or mixtures thereof having hydrazines, hydrazide groups and / or hydrazone groups, and polyhydrazides and polyhydric hydrazides having at least two or more of these groups. Compounds are also used. Polyurethane-vinyl-hybrid polymers also include ion-and / or non-ionic-stabilized polyurethane macros having terminal vinyl groups and / or side chain vinyl groups and, in some cases, terminal hydroxyl groups, urethane groups, thiourethane groups or urea groups.
• Crosslinked polyurethane has excellent solvent resistance, adhesion, and stability compared to those without self-crosslinking groups, so even when only hydrazides and carbonyl group-containing polyurethane resin aqueous emulsions are used.
• the silanol-modified crosslinked polyurethane exhibits a higher level of solvent resistance and adhesion.
• a surface treatment agent using a polyurethane resin aqueous emulsion used as a mixture of these can reduce friction during sliding of a rubber or resin sealing member and improve solvent resistance.
• the silanol group contained therein is also excellent in this respect because it is compatible with silicone oil and silane compounds, which are constituents of the aqueous surface treatment agent.
• the polyurethane resin that forms the component (E) is one that has a glass transition point of -30 ° C or less in order to ensure flexibility at low temperatures.
• a polyurethane resin having a heat softening temperature of 70 ° C. or lower, which can be softened at the time of use and can further improve the sealing property is added as an aqueous emulsion.
• the aqueous emulsion of such a polyurethane resin include the following components.
• the thermal softening temperature is a temperature at which the start of softening is observed when the temperature of the resin is raised from 40 ° C. to 150 ° C. at a heating rate of 5 ° C./min using a flow tester.
• Examples of the component (E) include aromatic isocyanate ester-based polyurethane resin aqueous emulsions, aromatic isocyanate ether-based polyurethane resin aqueous emulsions, non-yellowing isocyanate carbonate-based polyurethane resin aqueous emulsions, and non-yellowing isocyanate ether-based polyurethane resin aqueous emulsions.
• Examples thereof include a non-yellowing type isocyanate ester-based polyurethane resin aqueous emulsion and a non-yellowing type isocyanate ester / ether-based polyurethane resin aqueous emulsion.
• the thermal softening temperature of these differs depending on the molecular weight, branching or cross-linking density, and the like.
• a polyurethane resin having a heat softening temperature of more than 70 ° C. for example, an aqueous emulsion of a polyurethane resin such as Dai-ichi Kogyo Seiyaku product Superflex 650 is used, the corrosion resistance of the aluminum base material or the like in the salt water corrosion test is improved. I can't.
• the total amount of the polyurethane resin (solid content) of the components (B), (D) and (E) is about 100 parts by weight or more with respect to 100 parts by weight of the silicone oil amount (nonvolatile content) of the silicone oil aqueous emulsion. It is preferably blended in a proportion of about 100 to 2,000 parts by weight. If the modified polyurethane resin is used in a smaller proportion than this, the coatability is inferior and the silicone oil is bleeding, resulting in inferior durability, which is not preferable.
• the ratio between each component that is, the (A + C) / (B + D + E) solid content ratio, that is, the solid content ratio (raw material containing Si / raw material containing urethane bond without urethane bond) is 0.5. It should be ⁇ 1.0, preferably 0.5 ⁇ 0.7. If the solid content ratio exceeds 1.0, the corrosion resistance of the aluminum base material and the like in the salt water corrosion test cannot be improved.
• the solid content ratio (E) / (B) of the component (E) to the component (B) component silanol-modified polyurethane resin aqueous emulsion is preferably 0.5 or more, preferably 0.7 or more. If this solid content ratio is less than 0.5, the corrosion resistance of the aluminum base material or the like in the salt water corrosion test may not be improved.
• the surface treatment agent consisting of each of the above essential components is an amphoteric surfactant such as an alkylamine oxide compound or an alkylbetaine in order to prevent repelling and liquidation and prevent coating spots and insufficient coating amount.
• an amphoteric surfactant such as an alkylamine oxide compound or an alkylbetaine in order to prevent repelling and liquidation and prevent coating spots and insufficient coating amount.
• the alkylamine oxide-based compound include dimethylalkylamine oxide and the like
• examples of the alkylbetaine include alkyldimethylaminoacetate betaine and the like.
• Examples of the alkyl group include a lauryl group, a myristyl group, a natural oil-modifying group such as coconut oil and the like. Is exemplified.
• the blending amount of the alkylamine oxide compound or alkylbetaine is used so as to be within 10% by weight based on the total amount of the composition. These are used as the (G
• polyurethane resin aqueous emulsion examples include a self-emulsifying type in which a hydrophilic group is introduced into the polyurethane structure and a forced emulsifying type emulsified using an emulsifier.
• a self-emulsifying type in which a hydrophilic group is introduced into the polyurethane structure
• a forced emulsifying type emulsified using an emulsifier are ether polyol type, ester polyol type, polycarbonate type and the like.
• the structure of the molecule can be used without particular limitation.
• a defoaming agent, a pigment, an inorganic powder, a thickener, a surfactant and the like can be further added to the surface treatment agent, if necessary, and the composition is prepared from the viewpoint of coating efficiency and coatability. It is used diluted with water so that the active ingredient has a concentration of 0.1 to 40% by weight. Each of these ingredients is mixed, thoroughly stirred and emulsified before use. Mixing is performed using a mixing stirrer equipped with known paddle type or anchor type stirring blades, combimix, etc., and emulsification treatment is performed by an emulsification / dispersing device such as a colloid mill, a homomixer, a homogenizer, a combimix, or a sand grinder. Is done using.
• the prepared surface treatment agent is applied to the surface of the member to be treated by a dipping method, a brush coating method, a roll coating method, a spray coating method, a knife coating method, a dip coating method, etc., and then at about 120 to 150 ° C.
• the surface treatment is performed by heating and drying for about 30 to 60 minutes to form a cured film.
• the surface treatment agent of the present invention is a rubber material such as fluorine rubber, NBR, hydride NBR, SBR, isoprene rubber, butadiene rubber, chloroprene rubber, acrylic rubber, EPDM, urethane rubber, silicone rubber, and thermoplastics such as ABS and AS. Although it is effectively used as a surface treatment agent for resin materials such as resins and thermosetting resins, the main object of the present invention is to improve the corrosion resistance of aluminum substrates and the like in salt water corrosion tests.
• a converter for a fuel cell vehicle FC
• an electric power steering / computer EPS / ECU
• HEV hybrid electric vehicle
• thermo housing thermo housing
• CVT continuously variable transmission
• W electric water pump
• Example 1 Emulsion polymerization containing hydroxyl groups at both ends 54.5 (18.0) parts by weight Polydimethylsiloxane aqueous emulsion (viscosity at 25 ° C, 100,000 mPa ⁇ sec, non-volatile content 33%)
• B Silanol-modified polyurethane resin 50.0 (15.0) ⁇ Aqueous emulsion (solid content 30% by weight; Mitsui Chemicals polyurethane product Takelac WS-5000)
• C ⁇ -glycidoxypropyltrimethoxysilane 9.1 ⁇
• D Hydrazides and carbonyl group containing 36.4 (13.1) ⁇ Polyurethane resin aqueous emulsion (solid content 36% by weight; Daotan VTW 6462 / 36WA)
• E Aromatic isocyanate ester type 25.0 (10.0) ⁇ Polyurethane resin aqueous emulsion (solid content 40% by weight, glass transition point -34 ° C
• EPDM sheet and EPDM O-ring (hardness JIS A 70 degrees, dimensions: inner diameter 7.8 mm, thickness 1.9 mm diameter, nominal number JIS B) were used by the spray coating method. After coating on 2401-4 type D P8), it was cured at 150 ° C. for 30 minutes to prepare a double-sided coated EPDM sheet and an EPDM O-ring having a coating film having a thickness of about 10 ⁇ m.
• Coefficient of friction Measures the coefficient of dynamic friction of the surface of rubber sheet made of surface-treated EPDM with HEIDON's surface tester TYPE 14DR according to ASTM D-1894 (test conditions)
• Mating material SUS304 chrome-plated steel ball with a diameter of 10 mm
• Adhesion test Both sides of EPDM sheet (width 5 mm) are coated, both sides of the coating surface are sandwiched between 2 mm thick SUS301 plates, heat-treated at 100 ° C for 30 minutes, cooled to room temperature, and weighted by Minebea.
• Salt water corrosion test Made of coated EPDM The O-ring is sandwiched between an aluminum base material (ADC12) having a roughness of Rz6um at a compression ratio of 17%, immersed in 5% by weight of saline solution at 50 ° C. for 2000 hours, and then the aluminum base material and the O-ring are released.
• ADC12 aluminum base material
• ⁇ No corrosion on the seal surface
• ⁇ The seal surface was corroded but did not exceed the seal line ⁇ : Corrosion beyond the seal line
• Example 2 In Example 1, the amount (solid content weight) of the (B) component silanol-modified polyurethane resin aqueous emulsion was changed to 10 parts by weight.
• Example 3 In Example 1, the amount of (B) component silanol-modified polyurethane resin aqueous emulsion (solid content weight) was 20 parts by weight, and the amount of (E) component aromatic isocyanate ester-based polyurethane resin aqueous emulsion (solid content weight) was 20 parts by weight. I changed to each department.
• Example 4 In Example 1, the amount of (B) component silanol-modified polyurethane resin aqueous emulsion (solid content weight) was 10 parts by weight, and the amount of (E) component aromatic isocyanate ester-based polyurethane resin aqueous emulsion (solid content weight) was 5 weight. I changed to each department.
• Example 5 In Example 1, the amount of (B) component silanol-modified polyurethane resin aqueous emulsion (solid content weight) was set to 5 parts by weight, and the amount of (E) component aromatic isocyanate ester-based polyurethane resin aqueous emulsion (solid content weight) was set to 20 parts by weight. I changed to each department.
• Example 6 In Example 1, instead of the aromatic isocyanate ester-based polyurethane resin aqueous emulsion of (E), a non-yellowing isocyanate carbonate-based polyurethane resin aqueous emulsion (solid content 45% by weight, glass transition point -39 ° C.) was used as the component (F). , Thermal softening temperature 62 ° C; the company's product Superflex 500M) was used by 22.0 parts by weight (solid content weight 9.9).
• Example 3 5 parts by weight (as a solid content) of the (E) component aromatic isocyanate ester-based polyurethane resin aqueous emulsion was used.
• Example 5 Comparative Example 2 In Example 5, the component (A), the component (C), and the component (D) were not used, and 10 parts by weight (as a solid content) of the aqueous emulsion of the aromatic isocyanate ester-based polyurethane resin of the component (E) was used.
• Example 5 5 parts by weight (as a solid content) of the (E) component aromatic isocyanate ester-based polyurethane resin aqueous emulsion was used.
• Example 4 Comparative Example 4 In Example 4, the (E) component aromatic isocyanate ester-based polyurethane resin aqueous emulsion was not used.
• Example 1 Comparative Example 5 In Example 1, the component (B) component silanol-modified polyurethane resin aqueous emulsion was not used.
• Example 6 Comparative Example 6 In Example 1, the amount of (B) component silanol-modified polyurethane resin aqueous emulsion (solid content weight) was 30 parts by weight, and the amount of (E) component aromatic isocyanate ester-based polyurethane resin aqueous emulsion (solid content weight) was 30 parts by weight. I changed to each department.
• Example 9 In Example 1, the amount of (B) component silanol-modified polyurethane resin aqueous emulsion (solid content weight) was 100 parts by weight, and the amount of (E) component aromatic isocyanate ester-based polyurethane resin aqueous emulsion (solid content weight) was 100 parts by weight. I changed to each department.

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