WO2022145375A1 - Composition de revêtement de peinture primaire durcissable par rayonnement actinique pour plastique renforcé de fibres - Google Patents
Composition de revêtement de peinture primaire durcissable par rayonnement actinique pour plastique renforcé de fibres Download PDFInfo
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- WO2022145375A1 WO2022145375A1 PCT/JP2021/048272 JP2021048272W WO2022145375A1 WO 2022145375 A1 WO2022145375 A1 WO 2022145375A1 JP 2021048272 W JP2021048272 W JP 2021048272W WO 2022145375 A1 WO2022145375 A1 WO 2022145375A1
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- WIPO (PCT)
- Prior art keywords
- oil
- meth
- alkyd resin
- acrylate
- active energy
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- 230000001846 repelling effect Effects 0.000 description 1
- 239000012508 resin bead Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000005019 vapor deposition process Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/08—Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
-
- 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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
-
- 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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
Definitions
- the present invention relates to an active energy ray-curable undercoat coating composition for FRP that performs metal vapor deposition.
- Reflector members such as automobile lighting fixtures are lightweight and have excellent corrosion resistance, heat resistance, and impact resistance. From the viewpoint, PPS (polyphenylsulfide), PPE (polyphenylene ether), and PBT (polybutylene terephthalate) reinforced with fillers such as glass fiber are used. ) / PET (polyethylene terephthalate) alloy resin, heat-resistant PC (polycarbonate), ABS (acrylonitrile-butadiene-styrene copolymer resin), PMMA (acrylic resin) and other fiber reinforced plastics (hereinafter also referred to as "FRP") surface Is often used as a mirror surface.
- PPS polyphenylsulfide
- PPE polyphenylene ether
- PBT polybutylene terephthalate
- FRP fiber reinforced plastics
- a method of forming a mirror surface on FRP a method of vapor deposition or sputtering of a metal such as aluminum is generally used, but it is difficult to obtain a smooth material surface due to segregation of fibers, mixed air bubbles, etc., and it is usually on the FRP surface.
- a method is adopted in which a mirror surface is obtained by depositing a metal after the undercoat paint is applied and cured.
- the undercoat paint used for this purpose has heat resistance to light bulbs, engines, sunlight, etc., as well as heat sources that melt metals in vacuum deposition and sputtering processes, and metals that collide with and adhere to coatings at high temperatures. Heat resistance is also required, and active energy ray-curable paints having excellent coating film hardness have been used.
- the above-mentioned undercoat paint has been formulated with an oil-modified alkyd resin having excellent corrosion resistance, heat resistance, and repeated cold heat resistance, which achieves both adhesion to the non-uniform material surface where fibers are segregated and adhesion to vapor-deposited metal.
- the oil-modified alkyd resin is produced by a dehydration condensation reaction between a monofunctional fatty acid such as soybean oil, a bifunctional or higher acid such as phthalic acid or an acid anhydride thereof, and a bifunctional or higher alcohol such as ethylene glycol.
- the solvent used for the dehydration condensation reaction is required to have a low meltability of water and a boiling point suitable for the dehydration condensation reaction temperature, and xylene (a mixture of ortho-type, meta-type, para-type and ethylbenzene) has been generally used. rice field.
- xylene can be used as thinner for paints, it can be used without removing the solvent or replacing the solvent.
- xylene has an effect on the human body and aquatic organisms as a harmful substance along with benzene and toluene, and in recent years, the scope of application of paints containing a certain amount or more of xylene has been severely restricted. Attempts have been made to produce an alkyd resin using a xylene substitute solvent, but since the substitute solvent is not suitable for paint thinner, the painting workability and the appearance of painting are deteriorated. Further, desolvation of xylene has been tried, but there are problems that the energy required for desolvation is large, the stability of the alkyd resin after desolvation is deteriorated, and the storage stability is deteriorated. Active energy ray-curable undercoat paint compositions for FRP that perform metal vapor deposition without using alkyd resin are also being developed, but the material selectivity for the reflector member of automobile lamps, which is a combination of various materials, is The width is narrow.
- Filaments and HID-type light bulbs used in conventional automobile lamps generate a large amount of heat as light is generated, so even if water gets inside the lamp due to rain or car wash, the use of the lamp keeps the internal space dry. I was leaning. Although LED bulbs are rapidly becoming widespread, since heat is not generated in the light radiation direction, moisture in the internal space of the lamp cannot be removed, so that the moisture resistance of the coating film is required to be improved.
- unsaturated polyester resin BMC: bulk molding compound
- PPE polyphenylene ether
- PBT polyphenylene ether
- PBT FRP such as polybutylene terephthalate
- PET polyethylene terephthalate
- PC polycarbonate
- ABS acrylonitrile-butadiene-styrene copolymer resin
- PMMA acrylic resin
- Patent Document 1 (WO 1995/032250) describes an ultraviolet curable undercoat liquid composition for metal vapor deposition for FRP containing a compound having at least two (meth) acryloyl groups and an oil-modified alkyd resin.
- xylene is essential as a diluent in this composition, it cannot be used in applications that limit the use of xylene.
- the composition using the alkyd resin of Patent Document 1 is applied to an automobile lamp fixture reflective member for LED bulbs, it contains a large amount of xylene having a high boiling point. Whitening due to poor drying and poor mirror surface after vapor deposition are likely to occur at thick film sites.
- the coating composition of Patent Document 1 has a high hydroxyl value of the alkyd resin, a polyfunctional (meth) acrylate having a high hydroxyl value is intentionally prescribed from the viewpoint of solubility and storage stability. Since the hydroxyl groups in the composition do not contribute to the ultraviolet curing reaction, many hydroxyl groups remain in the cured coating film. Therefore, the cured coating film of the coating film of Patent Document 1 is liable to cause defects such as peeling in a moisture resistance test or a temperature / humidity resistance cycle test assuming a closed space inside an automobile lamp.
- the present invention is an improvement of the undercoat coating composition of Patent Document 1, and is designed for LED light bulbs made of a material having a large amount of outgas. It is an object of the present invention to provide an active energy ray-curable undercoat coating composition for FRP, which is subjected to metal vapor deposition using an oil-modified alkyd resin having improved temperature / humidity cycle resistance.
- An active energy ray-curable undercoat coating composition for FRP which comprises metal vapor deposition containing a polyfunctional (meth) acrylate (A) and an oil-modified alkyd resin (B).
- the polyfunctional (meth) acrylate (A) has two or more (meth) acryloyl groups in the molecule, and the total amount of the polyfunctional (meth) acrylate (A) and the oil-modified alkyd resin (B). It is contained in an amount of 55 to 85 parts by mass with respect to 100 parts by mass.
- the oil-modified alkyd resin (B) is contained in an amount of 15 to 45 parts by mass with respect to 100 parts by mass of the total amount of the polyfunctional (meth) acrylate (A) and the oil-modified alkyd resin (B).
- the oil-modified alkyd resin (B) has an oil length of 35 to 50%, an acid value of 0.01 to 10 mgKOH / g, a hydroxyl value of 80 to 130 mgKOH / g, and a weight average molecular weight of 80,000 to 150,000.
- Active energy ray-curable undercoat coating composition for FRP Active energy ray-curable undercoat coating composition for FRP.
- the oil-modified alkyd resin (B) is modified by at least one selected from the group consisting of tall oil, soybean oil, safflower oil, flaxseed oil, millet oil, castor oil and a mixture of these fats and oils.
- the active energy ray-curable undercoat coating composition for FRP which comprises the metal vapor deposition according to [1].
- the oil / fat component (b) used for the modification of the oil-modified alkyd resin (B) has an iodine value of 80 to 160 when used alone or in a mixture of two or more kinds of oils and fats, [1] or [2].
- the active energy ray-curable undercoat coating composition for FRP that performs the metal vapor deposition according to the above.
- the active energy ray-curable undercoat coating composition further contains a photopolymerization initiator (C) in an amount of 1 to 15 parts by mass with respect to 100 parts by mass of the total amounts of the components (A) and (B).
- the active energy ray-curable undercoat coating composition for FRP which performs the metal deposition according to any one of [1] to [3].
- the active energy ray-curable undercoat coating composition is at least one selected from the group consisting of a surface conditioner, an ultraviolet absorber, a light stabilizer, an antioxidant, a storage stabilizer, an adhesion imparting agent and a mixture thereof.
- the active energy ray-curable undercoat coating composition for FRP which comprises a seed and is subjected to the metal deposition according to any one of [1] to [4].
- the active energy ray-curable primer composition further comprises at least one selected from the group consisting of organic pigments, inorganic pigments, organic beads, inorganic beads and mixtures thereof.
- the active energy ray-curable undercoat coating composition for FRP which performs the metal vapor deposition according to item 1.
- the present invention provides an active energy ray-curable undercoat coating composition for FRP that performs metal vapor deposition excellent in storage stability and coating appearance even if the xylene content in the coating material is less than 1%.
- the oil-modified alkyd resin is adjusted to have an oil length of 35 to 50%, an acid value of 0.01 to 10 mgKOH / g, a hydroxyl value of 80 to 130 mgKOH / g, and a weight average molecular weight of 80,000 to 150,000. It has become possible to significantly reduce the content of xylene.
- materials having a large amount of outgas PPS (polyphenyl sulfide), PPE (polyphenylene ether), PBT (polybutylene terephthalate) / PET (polybutylene terephthalate) alloy resin, heat-resistant PC (polycarbonate), ABS (acrylonitrile-butadiene).
- PPS polyphenyl sulfide
- PPE polyphenylene ether
- PBT polybutylene terephthalate
- PET polybutylene terephthalate
- heat-resistant PC polycarbonate
- ABS acrylonitrile-butadiene
- -It is an undercoat paint that can reduce or prevent defects due to outgas when a reflective member using (styrene copolymer resin), PMMA (acrylic resin) is applied, and has other performance, adhesion, energy saving, and environmental friendliness.
- the temperature and humidity cycle resistance is also improved.
- the active energy ray-curable undercoat coating material for FRP is an active energy ray-curable undercoat coating composition containing a polyfunctional (meth) acrylate (A) and an oil-modified alkyd resin (B), and is a polyfunctional (meth) acrylate.
- A has two or more (meth) acryloyl groups in the molecule, and is 55 to 85 with respect to 100 parts by mass of the total amount of the polyfunctional (meth) acrylate (A) and the oil-modified alkyd resin (B).
- the oil-modified alkyd resin (B) is contained in an amount of 15 to 45 parts by mass with respect to 100 parts by mass of the total amount of the polyfunctional (meth) acrylate (A) and the oil-modified alkyd resin (B).
- the oil-modified alkyd resin (B) has an oil length of 35 to 50%, an acid value of 0.01 to 10 mgKOH / g, a hydroxyl value of 80 to 130 mgKOH / g, and a weight average molecular weight of 80,000 to 150. It has 000.
- Polyfunctional (meth) acrylate (A)
- the component (A) of the active energy ray-curable paint undercoat coating composition of the present invention is a polyfunctional (meth) acrylate having at least two (meth) acryloyl groups in the molecule.
- the polyfunctional (meth) acrylate is polymerized by the action of a photopolymerization initiator by irradiation with ultraviolet rays and cured to form an undercoat coating film.
- Examples of the polyfunctional (meth) acrylate (A) include those obtained by reacting (a) a polyol with (meth) acrylic acid, (b) a compound having a terminal isocyanate group in the molecule, a hydroxyl group and the like. Examples thereof include urethane acrylate obtained by adding a compound having a (meth) acryloyl group.
- what is obtained by reacting (a) a polyol with (meth) acrylic acid is, for example, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate.
- the terminal isocyanate group is contained in the molecule.
- the compound having is, for example, isophorone diisocyanate, pentamethylene diisocyanate, hexamethylene diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, norbornan diisocyanate, 1,3-bis (isocyanatomethyl) cyclohexane (cis-, trans-mixed). ) And these nurate-type trimers.
- hydroxyl group-containing (meth) acrylate compound examples include hydroxyethyl (meth) acrylate, glycerindi (meth) acrylate, trimethylolpropane di (meth) acrylate, pentaerythritol tri (meth) acrylate, and trimethylolpropane tri (meth) acrylate. , Dipentaerythritol penta (meth) acrylate and the like.
- urethane (meth) acrylate (A) a hydroxyl group-containing (meth) acrylate compound may be used alone or in combination of two or more so that the average number of functional groups in the molecule is 2 or more.
- the polyfunctional (meth) acrylate (A) is used in an amount of 55 to 100 parts by mass based on a total amount of 100 parts by mass of the polyfunctional (meth) acrylate (A) and the oil-modified alkyd resin (B). It is composed of 85 parts by mass. If it is less than 55 parts by mass, the heat resistance and moisture resistance are deteriorated repeatedly, and if it exceeds 85 parts by mass, the adhesion is lowered, so that the range is limited to the above range. It is preferably 60 to 80 parts by mass.
- Oil-modified alkyd resin (B) The component (B) of the present invention is an oil-modified alkyd resin.
- the oil-modified alkyd resin (B) imparts adhesion to FRP.
- the oil-modified alkyd resin (B) used in the present invention has an oil length of 35 to 50%, an acid value of 0.01 to 10 mgKOH / g, a hydroxyl value of 80 to 130 mgKOH / g, and a weight average molecular weight of 80,000 to 150,000. It is necessary to have.
- the oil-modified alkyd resin can be obtained by using a fat or oil or a fat or oil fatty acid as a denaturing agent in addition to a polyhydric alcohol and a polybasic acid or an acid anhydride thereof.
- the polyhydric alcohol used in the oil-modified alkyd resin is not particularly limited, and is, for example, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, polyethylene glycol, trimethylene glycol, polypropylene glycol, tetramethylene glycol, poly.
- Alkylene oxide-modified or lactone-modified polyols polyester polyols having terminal hydroxyl groups obtained by condensing excess of these polyols with polybasic acid or an acid anhydride thereof, polyether polyols, and the like can also be mentioned. can.
- the polybasic acid or its acid anhydride is not particularly limited, and for example, phthalic acid, isophthalic acid, terephthalic acid, trimetic acid, methylcyclohexcentricarboxylic acid, adipic acid, sebacic acid, azelaic acid, tetrahydrophthalic acid, etc.
- examples thereof include acids, carbic acids, het acids, aconitic acids, glutaconic acids, and acid anhydrides thereof.
- the oil or fat fatty acid used as the modifier is not particularly limited and may be any of non-drying oil, semi-drying oil and dry oil, but the iodine value is preferably 80 to 160. There is. Such examples include those selected from the group consisting of tall oil, soybean oil, safflower oil, flax oil, millet oil, castor oil and mixtures of these oils and fats.
- the iodine value is expressed by the number of grams of iodine that can be added to 100 g of fats and oils, and indicates that the number of double bonds of fatty acids in the sample is large.
- the iodine value is less than 80, the compatibility with the polyfunctional (meth) acrylate having a double bond is lowered, the appearance is deteriorated, the ultraviolet curability is lowered, and the moisture resistance and the heat resistance are lowered. If it exceeds 160, the amount of the drying oil component increases, so that the storage stability of the alkyd resin and the composition decreases.
- the oil length of the oil-modified alkyd resin needs to be 35 to 50%.
- Oil length means a value expressing the oil content based on the weight percentage. If the oil length is less than 35%, the viscosity of the alkyd resin increases, so that the appearance of the coating deteriorates and the mirror surface cannot be finished. Further, when the oil length exceeds 50%, the viscosity of the alkyd resin is lowered, so that liquid dripping occurs after painting and the appearance is deteriorated.
- the oil-modified alkyd resin (B) used in the present invention needs to have an acid value in the range of 0.01 to 10 mgKOH / g. If the acid value is less than 0.01 mgKOH / g, it takes time to react almost to the end point of the reaction, and the productivity is lowered. If it is larger than 10 mgKOH / g, the storage stability of the oil-modified alkyd resin and the composition is lowered, and the water resistance and moisture resistance of the coating film are lowered.
- the acid value is preferably 1 to 7 mgKOH / g, more preferably 2 to 5 mgKOH / g.
- the oil-modified alkyd resin (B) needs to have a weight average molecular weight of 80,000 to 150,000.
- the weight average molecular weight is measured by gel permeation chromatography (GPC). If the weight average molecular weight is less than 80,000, the film forming property of the coating film is deteriorated and the defects of the FRP material cannot be concealed, so that the appearance is deteriorated and the heat resistance is deteriorated. If it exceeds 150,000, the viscosity becomes high, it is difficult to obtain a smooth coating film flat surface, the appearance is deteriorated, and the mirror surface is not finished after vapor deposition.
- the weight average molecular weight is preferably 90,000 to 130,000, more preferably 100,000 to 120,000.
- the undercoat coating composition of the present invention contains the oil-modified alkyd resin (B) in an amount of 15 to 45 parts by mass based on 100 parts by mass of the total amount of the polyfunctional (meth) acrylate (A) and the oil-modified alkyd resin (B). It is composed by containing a portion. If it is less than 15 parts by mass, the adhesiveness is lowered, and if it exceeds 45 parts by mass, the heat resistance and the repeated moisture resistance are inferior.
- the oil-modified alkyd resin (B) is preferably 20 to 35 parts by mass.
- Photopolymerization initiator (C) The active energy ray-curable undercoat coating composition of the present invention further contains a photopolymerization initiator (C) to impart active energy ray curability.
- the photopolymerization initiator (C) is not particularly limited, and for example, benzoin methyl ether, benzoin ethyl ether, benzoin isobutyl ether, benzoin isopropyl ether, benzoin, ⁇ -methylbenzoin, benzoin-n-butyl ether, 2-ethylanthraquinone, etc.
- 2-t-butylanthraquinone 1-chloranthraquinone, 2-aminoleanthraquinone, 2-aminoanthraquinone, benzophenone, p-chlorbenzophenone, p-dimethylaminobenzophenone, benzophenone methyl ether, methylbenzophenone, 4,4-dichlorobenzophenone, 4,4-Bisdiethylaminobenzophenone, diphenylsulfide, tetramethylthium disulfide, 2,4-dimethylthioxanthone, 2,4-diisopropylthioxanthone, 2,4-diethylthioxanthone, 2-chlorthioxanthone, 2-isopropylthioxanthone, 2, , 2-Dimethoxy-2-phenylacetophenone, ⁇ , ⁇ -dichloro-4-phenyloxyacetone, p-tert-butyl
- the photopolymerization initiator (C) is applied to a total of 100 parts by mass of the polyfunctional (meth) acrylate (A) and the oil-modified alkyd resin (B). It is composed of 1 to 15 parts by mass. If it is less than 1 part by mass, the active energy ray curing does not proceed, and the adhesion, water resistance, moisture resistance and heat resistance are inferior. If it exceeds 15 parts by mass, an unreacted photopolymerization initiator remains after irradiation with the active energy ray. It has the drawback of becoming a plasticizer and reducing adhesion, water resistance, moisture resistance, heat resistance, and the like. It is preferably 3 to 10 parts by mass.
- a solvent for example, a solvent, a surface conditioner, etc. can be further added in addition to the above components.
- the solvent has the effect of diluting the undercoat coating composition of the present invention to facilitate coating.
- the solvent is not particularly limited, and examples thereof include alcohol-based solvents, ketone-based solvents, ester-based solvents, petroleum-based solvents, and the like.
- Toluene, xylene and the like can be used in combination in order to improve the wettability, but it is preferable not to use them as much as possible in the active energy ray-curable undercoat coating composition of the present invention.
- the blending amount of the solvent can be increased or decreased as needed, but the amount of xylene used is 3% by weight or less, preferably 1% by weight or less, more preferably with respect to the solid content weight of the undercoat coating composition. It is preferable not to use.
- the amount of xylene used is 3% by weight or more, environmental regulations become stricter, and high temperature and long-term preheating conditions are required, which is economically disadvantageous.
- the surface preparation agent is not particularly limited, and examples thereof include a fluorine-based additive and a cellulosic-based additive.
- the fluorine-based additive has an effect of preventing repelling when applied to an FRP material by lowering the surface tension and increasing the wettability.
- Specific examples of the fluorine-based additive include Megafuck F-558 (manufactured by Dainippon Ink and Chemicals, Inc.) and the like.
- the cellulosic additive has an action of imparting film-forming property at the time of application.
- the undercoat coating composition of the present invention when the amount of the fluorine-based additive is large, the adhesion of steamed aluminum and the top coat is lowered, and when the amount of the cellulose-based additive is large, the undercoat coating composition of the present invention is used. Since the solid content of the above-mentioned is lowered and the coating film is less likely to adhere, it is preferable to use the above-mentioned fluorine additive and the above-mentioned cellulosic additive in combination.
- the addition amount of the surface preparation agent is the total amount of the fluorine-based additive and the cellulose-based additive with respect to 100% by mass of the solid content of the active energy ray-curable undercoat coating composition of the present invention. , 0.01 to 3.0 parts by mass is preferable. When the above-mentioned fluorine-based additive is used alone, 0.01 to 1.0 part by mass is preferable, and when the above-mentioned cellulose-based additive is used alone, 0.5 to 5.0 parts by mass is preferable. ..
- the active energy ray-curable coating composition further comprises a surface conditioner, an ultraviolet absorber, a light stabilizer, an antioxidant, a storage stabilizer, an adhesion-imparting agent, an organic or inorganic pigment, an organic bead, as required. It may contain commonly used additives such as inorganic beads and mixtures thereof. These additives can be included in the amount range normally used by those skilled in the art.
- the surface conditioner is not particularly limited, and is, for example, an acrylic polymer leveling agent, a rust inhibitor, a liquid dripping inhibitor such as amido wax, an electrostatic aid that improves the adhesion of paint, and a vapor-deposited metal.
- examples include rust preventives.
- the ultraviolet absorber is not particularly limited, and examples thereof include ultraviolet absorbers such as benzophenone-based, benzotriazole-based, and triazine-based.
- the light stabilizer is not particularly limited, and examples thereof include a light stabilizer such as a hindered amine type.
- the antioxidant is not particularly limited, and examples thereof include hindered phenolic antioxidants. Examples of the storage stabilizer include 4-methoxyphenol and dibutylhydroxytoluene.
- the adhesion-imparting agent is not particularly limited, and examples thereof include a benzotriazole-based adhesion-imparting agent, a silane coupling agent, and a titanium coupling agent.
- the organic or inorganic pigment is not particularly limited, and examples thereof include silica, alumina, carbon black, and aluminum paste.
- the organic beads, the inorganic beads and a mixture thereof are not particularly limited, and examples thereof include silica, alumina, acrylic resin beads, urethane resin beads, organic pigments and organic beads containing an inorganic pigment.
- the undercoat coating composition of the present invention is applied to the surface of the molded product. Then, it is irradiated with ultraviolet rays to form a base coat eyebrows.
- the above coating can be performed by air spray coating, electrostatic coating, dip coating, or the like.
- the dry film thickness is set to 8 to 50 ⁇ m, and before the above ultraviolet irradiation, the solvent is evaporated by preheating at 70 to 130 ° C. under the condition of 2 to 25 minutes. If the temperature of the above-mentioned polymer is less than 70 ° C, the solvent remains in the coating film and the water resistance and heat resistance are inferior. There is a drawback that defects and sublimation of the photopolymerization initiator occur, the UV curability is lowered, and the physical properties of the coating film are deteriorated.
- the evaporation time of the pre-polymer is less than 2 minutes, the solvent remains in the coating film and the water resistance and heat resistance are inferior. If it exceeds 25 minutes, the photopolymerization initiator is sublimated and the ultraviolet curability is lowered. There is a drawback that the physical properties of the coating film are deteriorated.
- the evaporation time is preferably 2 to 10 minutes, more preferably 2 to 5 minutes, and the solvent is evaporated by preheating.
- the ultraviolet irradiation can cure the undercoat coating composition of the present invention under the integrated light amount condition of 500 to 5000 mJ / cm2. If the integrated light amount is less than 500 mJ / cm2, there is a drawback that the physical characteristics of the coating film are deteriorated due to insufficient curing by ultraviolet rays. If it exceeds 5000 mJ / cm2, the ultraviolet curability is not affected, but there is a drawback that the material is deformed by the heat from the ultraviolet lamp and the appearance is deteriorated.
- active energy rays such as high-pressure mercury lamps, metal halide lamps, UV-LED lamps, electron beams, and xenon lamps, which are usually used in the art, can be used for the ultraviolet irradiation.
- Various layers can be provided on the undercoat layer (sometimes referred to as a "primer layer") formed in this way.
- the metal vapor deposition layer include an aluminum vapor deposition layer, an indium vapor deposition layer and a tin vapor deposition layer.
- the metal vapor deposition layer can be provided by a known method such as a vacuum method, a sputtering method (for example, a DC magnetron sputtering method, an RF sputtering method, an ion beam sputtering method, etc.), an electron beam vapor deposition method, an ion plating method, or the like.
- the metal-deposited layer is an aluminum-deposited layer, it can also be formed by painting a coating composition containing a vapor-deposited aluminum pigment.
- a coat layer may be provided on the primer layer by using, for example, a known paint composition containing a resin component such as an acrylic resin or a urethane resin. Further, a coat layer may be provided on the metal vapor deposition layer as needed.
- Polyfunctional (meth) acrylate (A) with two or more (meth) aquiloyl groups The following is an example of a polyfunctional (meth) acrylate (A) having two or more (meth) aquiloyl groups in the molecule used in the examples. Most of them are commercial products, and the specific components are described as far as they can be understood. Some of them are synthesized, but the synthesis method will be described as Production Example 1 after the example. When actually used, these polyfunctional (meth) acrylates are used alone or in combination to control the number of reactive groups. The number of functional groups is shown in Tables 3 and 4.
- the polyfunctional (meth) acrylate (A) having two or more (meth) aquiloyl groups in the molecule is, for example, NK ester A-DPH, NK manufactured by Shin-Nakamura Chemical Co., Ltd. as a mixture of dipentaerythritol hexaacrylate and pentaacrylate.
- Production Example 1 Production of a trimer of 1,6-hexamethylene diisocyanate and urethane acrylate (b) of hydroxyethyl acrylate 100 parts of butyl acetate in a synthetic container equipped with a cooling tube, a stirrer, a dropping device, and a nitrogen introduction tube. And 100 parts of Duranate TPA-100 (trifunctional isocyanate) manufactured by Asahi Kasei Co., Ltd. was added.
- Duranate TPA-100 trifunctional isocyanate
- 2-hydroxyethyl acrylate was added in an amount equivalent to 1 equivalent of a monomer molecule with respect to 1 equivalent of an isocyanate group, 0.1 part of dibutyltin dilaurylate and 0.1% of dibutylhydroxytoluene with respect to 2-hydroxyethyl acrylate.
- the mixture was added in such an amount, stirred and mixed at room temperature, and then reacted at 80 ° C. for 4 hours under a nitrogen atmosphere to obtain the desired urethane acrylate (b) (number of functional groups: 3).
- Oil-modified alkyd resin (B) The following describes the production example of the oil-modified alkyd resin used in the examples.
- the formulations at the time of production are summarized in Tables 1-1, 1-2 and Table 2, and the production methods are described in the following production examples. Some are used in the manufactured examples and some are used in the comparative examples, and the distinction between them is also shown in Tables 1 and 2.
- Tables 1 and 2 show the total components during the reaction, the amount of produced water, the iodine value of the obtained oil-modified alkyd resin, the oil length (%), the hydroxyl value, the acid value, the weight average molecular weight (Mw), and the solid. Minutes (%) and xylene amount (%) are also shown.
- Tables 1-1, 1-2 and Table 2 the values below the iodine value are measured values, but all other values indicate parts by weight.
- the column below the alkyd number describes the difference between the examples and the comparative examples, and which points are different in the case of the comparative examples very simply.
- Alkyd-1 For a corben for a synthetic reaction of a tall oil-modified alkyd resin having an oil length of 39%. 2565 g (8.88 mol) of tall oil fatty acid and 963 g (6.84 mol) of pentaerythritol were charged, and the temperature was raised to 230 ° C. in 2 hours and 30 minutes while stirring and taking the produced water out of the system.
- the iodine value of the tall oil fatty acid is 132
- the hydroxyl value of the obtained alkyd resin is 150 mg / KOH ⁇ g
- the weight molecular weight is 112,000
- the solid content is 53.3%
- the xylene content is 46.7%. there were.
- Production Example 3 Method for producing an oil-modified alkyd resin containing almost no xylene Alkid-2: Synthesis of a tall oil-modified alkyd resin having an oil length of 39% 2565 g (8.88 mol) of tall oil fatty acid and 963 g of pentaerythritol (8,88 mol) in corben for reaction. 6.84 mol) was charged, and the temperature was raised to 230 ° C. in 2 hours and 30 minutes while the generated water was taken out of the system while stirring.
- Production Example 4 Method for producing an oil-modified alkyd resin containing almost no xylene Alkyd-3: Synthesis of a tall oil-modified alkyd resin having a hydroxyl value of 140 mg / KOH ⁇ g and an oil length of 39% 506 g of ethylene glycol of Production Example 2 (8. A transparent oil-modified alkyd resin solution having an acid value of 4.6 and an oil length of 39% was obtained by the same method as in Production Example 2 except that 16 mol) was changed to 467.2 g (6.85 mol). The obtained alkyd resin had a hydroxyl value of 140 mg / KOH ⁇ g, a weight molecular weight of 108,000, a solid content of 53.1%, and a xylene content of 1.2%.
- Alkyd-6 to 8 were carried out in the same manner as that of alkyd-5, and a tall oil-modified alkyd resin having a target acid value of 39% and an oil length of 39% was synthesized by adjusting the reaction end point.
- Alkyd-9 to 12 were carried out in the same manner as in alkyd-5, and a tall oil-modified alkyd resin having a target weight molecular weight and an oil length of 39% was synthesized by adjusting the reaction end point.
- Alkyd-13 to 17 were carried out in the same manner as Alkyd-5 except that the prescription amounts of tall oil fatty acid and ethylene glycol were adjusted, and a tall oil-modified alkyd resin having a target weight molecular weight and oil length was synthesized.
- an oil-modified alkyd resin having an oil length of 39% was synthesized by the same method as alkyd-5 except that the tall oil fatty acid was changed to castor oil and safflower oil.
- Examples 1-47 and Comparative Examples 1-16 The undercoat paints of Examples and Comparative Examples were prepared according to the formulations shown in Tables 3 to 6.
- the ingredients are polyfunctional (meth) acrylate (A), oil-modified alkyd resin (B), photoinitiator (benzophenone or 1-hydroxycyclohexylphenylketone) and surface. It contains an initiator (Megafuck F-558), and in Tables 5-1, 5-2 and 6, polyfunctional (meth) acrylate (A), bifunctional monomer (A), oil-modified alkyd resin (B). , Photoinitiator (benzophenone), surface conditioner (Megafuck F-558) and monomer.
- the formulation also describes the amount of xylene contained in the oil-modified alkyd resin (B).
- Megafuck F-558 is a surface conditioner commercially available from DIC Corporation.
- alkyd number means an alkyd-number and means an alkyd resin number.
- FRP Automotive Reflector A fiber reinforced plastic (FRP) molded product for an automobile reflector is washed with isopropyl alcohol (IPA), dried, and then the undercoat coating composition for each FRP obtained in the above Examples and Comparative Examples.
- IPA isopropyl alcohol
- Example 3-1 to 6 the undercoat coating composition for each FRP obtained in the above Examples and Comparative Examples.
- Tables 3-1 to 6 the solvent is removed by preheating under the predetermined conditions shown in Tables 3-1 to 6, and ultraviolet rays are irradiated at an irradiation amount of 3000 mJ / cm 2 using an ozone type diffusion type high-pressure mercury lamp of 80 W / cm.
- a base coat layer was formed on the surface of the FRP molded product.
- an overcoat paint is further applied by air spray so as to have a predetermined dry film thickness, and baked under predetermined conditions to obtain a top coat.
- a layer was formed and an automobile reflector made of FRP was produced.
- the obtained FRP automobile reflector was evaluated by performing a performance test on the following items. The results are shown in Tables 3-1 to 6.
- Performance test evaluation method 1 Appearance of coating film The appearance was visually observed to inspect the smooth surface condition and the presence or absence of defects such as rainbows, whitening, cracks, and blisters. Those without defects were marked with ⁇ , those without defects such as rainbows, whitening, cracks, and blisters were marked with ⁇ , those with slight defects were marked with ⁇ , and those with defects were marked with ⁇ .
- the water resistance was immersed in a constant temperature water bath at 40 ° C. for 30 hours, taken out, wiped lightly with a cloth, and the appearance and adhesion were evaluated in the same manner as in the above method.
- Comparative Examples 1 to 5 use the oil-modified alkyd resin of the example of the old patent (Cited Document 1), and the amount of xylene is high.
- Comparative Examples 6 to 10 used the alkyd resin-5, and Comparative Examples 6 and 7 had the blending amount of the oil-modified alkyd resin (B) out of the range of the claims.
- a monofunctional monomer is used, and in Comparative Examples 9 to 16, the hydroxyl value, acid value and the like of the oil-modified alkyd resin (B) are out of the range of claim 1.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
L'invention a pour objet de fournir une composition permettant une mise en œuvre en tant que revêtement de peinture primaire durcissable par rayonnement actinique, sans presque pas mettre en œuvre de xylène en tant que solvant. Plus précisément, l'invention fournit une composition de revêtement de peinture primaire durcissable par rayonnement actinique pour plastique renforcé de fibres qui effectue une déposition métallique contenant un (méth)acrylate fonctionnel (A) et une résine alkyde (B) modifiée par une huile. Ledit (méth)acrylate fonctionnel (A) possède au moins deux groupes (méth)acryloyle à l'intérieur de chaque molécule, et est compris selon une quantité de 55 à 85 parties en masse pour 100 parties en masse de quantité totale dudit (méth)acrylate fonctionnel (A) et de ladite résine alkyde (B) modifiée par une huile. Ladite résine alkyde (B) modifiée par une huile est comprise selon une quantité de 15 à 45 parties en masse pour 100 parties en masse de quantité totale dudit (méth)acrylate fonctionnel (A) et de ladite résine alkyde (B) modifiée par une huile. Enfin, ladite résine alkyde (B) modifiée par une huile présente un rapport huile/résine compris entre 35 et 50%, un indice d'acide compris entre 0,01 et 10mgKOH/g, un indice d'hydroxyle compris entre 80 et 130mgKOH/g, et une masse moléculaire moyenne en poids comprise entre 80000 et 150000.
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JP2020219110A JP2022104104A (ja) | 2020-12-28 | 2020-12-28 | Frp用活性エネルギー線硬化性下塗り塗料組成物 |
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003221408A (ja) * | 2002-01-30 | 2003-08-05 | Nippon Synthetic Chem Ind Co Ltd:The | 紫外線硬化型樹脂組成物、塗膜形成方法及びその用途 |
WO2015019898A1 (fr) * | 2013-08-07 | 2015-02-12 | Dic株式会社 | Composition de résine durcissable par rayons énergétiques actifs, agent de couche intermédiaire la contenant, et article moulé |
JP2016199690A (ja) * | 2015-04-10 | 2016-12-01 | 関西ペイント株式会社 | 塗料組成物 |
JP2017039792A (ja) * | 2015-08-17 | 2017-02-23 | Dic株式会社 | 活性エネルギー線硬化型樹脂組成物、これを含有する下塗り用コーティング剤及び成形体 |
JP2017039791A (ja) * | 2015-08-17 | 2017-02-23 | Dic株式会社 | 活性エネルギー線硬化型樹脂組成物、これを含有する下塗り用コーティング剤及び成形体 |
WO2018012295A1 (fr) * | 2016-07-14 | 2018-01-18 | Dic株式会社 | Composition de résine durcissable par rayonnement d'énergie active et agent de sous-couche à film mince métallique |
JP2018177844A (ja) * | 2017-04-04 | 2018-11-15 | 関西ペイント株式会社 | 塗料組成物及び複層塗膜形成方法 |
-
2020
- 2020-12-28 JP JP2020219110A patent/JP2022104104A/ja active Pending
-
2021
- 2021-12-22 TW TW110148229A patent/TW202233774A/zh unknown
- 2021-12-24 WO PCT/JP2021/048272 patent/WO2022145375A1/fr active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003221408A (ja) * | 2002-01-30 | 2003-08-05 | Nippon Synthetic Chem Ind Co Ltd:The | 紫外線硬化型樹脂組成物、塗膜形成方法及びその用途 |
WO2015019898A1 (fr) * | 2013-08-07 | 2015-02-12 | Dic株式会社 | Composition de résine durcissable par rayons énergétiques actifs, agent de couche intermédiaire la contenant, et article moulé |
JP2016199690A (ja) * | 2015-04-10 | 2016-12-01 | 関西ペイント株式会社 | 塗料組成物 |
JP2017039792A (ja) * | 2015-08-17 | 2017-02-23 | Dic株式会社 | 活性エネルギー線硬化型樹脂組成物、これを含有する下塗り用コーティング剤及び成形体 |
JP2017039791A (ja) * | 2015-08-17 | 2017-02-23 | Dic株式会社 | 活性エネルギー線硬化型樹脂組成物、これを含有する下塗り用コーティング剤及び成形体 |
WO2018012295A1 (fr) * | 2016-07-14 | 2018-01-18 | Dic株式会社 | Composition de résine durcissable par rayonnement d'énergie active et agent de sous-couche à film mince métallique |
JP2018177844A (ja) * | 2017-04-04 | 2018-11-15 | 関西ペイント株式会社 | 塗料組成物及び複層塗膜形成方法 |
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