WO2011009396A1 - 涂料组合物及其应用 - Google Patents

涂料组合物及其应用 Download PDF

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Publication number
WO2011009396A1
WO2011009396A1 PCT/CN2010/075299 CN2010075299W WO2011009396A1 WO 2011009396 A1 WO2011009396 A1 WO 2011009396A1 CN 2010075299 W CN2010075299 W CN 2010075299W WO 2011009396 A1 WO2011009396 A1 WO 2011009396A1
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WO
WIPO (PCT)
Prior art keywords
coating
coating composition
dust
titanium dioxide
titanate
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PCT/CN2010/075299
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English (en)
French (fr)
Inventor
李宇平
芦平
崔静
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乐金电子(天津)电器有限公司
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Publication of WO2011009396A1 publication Critical patent/WO2011009396A1/zh

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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D163/00Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins

Definitions

  • the present invention relates to a coating composition, and more particularly to a self-cleaning and non-dusting coating composition containing a photocatalyst and the use of the coating composition for forming a coating, for example, the coating on the inner wall surface Vacuum cleaner dust box.
  • Photocatalyst can effectively degrade pollutants such as furfural, benzene, toluene, diphenylbenzene, ammonia, etc., and has high-efficiency and broad-spectrum disinfection performance, which can decompose and indischarge the toxins released by bacteria or fungi.
  • Titanium dioxide is the most commonly used photocatalyst. It has self-cleaning properties and produces strong catalytic degradation under the action of light. It effectively degrades toxic and harmful gases in the air, kills a variety of bacteria, and decomposes toxins released by bacteria or fungi. And harmless treatment, it also has the functions of deodorization and anti-fouling.
  • the above effects of the photocatalyst are more pronounced when they are present in a thin film state, much higher than in the form of a powder state.
  • the prior art photocatalyst film forming technology has the disadvantages of one or the other: or because the preparation process involves a large amount of water and organic matter, the prepared film is liable to cause cracking during the drying process, which limits the thickness of the prepared film. Or there is a problem of aperture matching in controlling the size of the photocatalyst particles.
  • the vacuum cleaner is an indoor clean and hygienic household appliance for removing dust from floors, carpets, walls, furniture, clothing and various gaps.
  • the vacuum cleaner mainly comprises a suction device and a suction pipeline, and a suction device mainly composed of an electric motor and a fan is disposed in the body, the suction pipeline includes a suction head and an air suction pipe, and the suction nozzle has a downward opening suction.
  • the air port communicates with the air inlet of the fan through the air duct through the extension tube and the hose of the air suction pipe.
  • the motor drives the impeller of the fan to rotate at a high speed, and the air inside the vacuum cleaner is discharged, forming an instantaneous vacuum inside the vacuum cleaner, forming a relatively high negative pressure difference with the outside atmosphere.
  • the dust near the suction head is sucked into the dust collecting box in the body through the suction port together with the air.
  • the dust-laden air is filtered in the dust box of the body and then discharged from the air outlet to the outside of the vacuum cleaner. In this way, the effect of dust removal and clean floor is achieved.
  • the suction rate of the vacuum cleaner is divided into a number of operationally controlled stops, which are adapted to the working surfaces of different cleaning objects such as the floor, bed surface, carpet, sofa, corner, etc., so as to better absorb dust everywhere.
  • the inner wall of the casing is liable to adhere a large amount of dust in the use of the vacuum cleaner, and the electrostatic cleaner is used when the vacuum cleaner cleans the dust box.
  • the dust is not easily separated from the inner wall of the casing, which makes the dust box difficult to clean and inconvenience to the user.
  • due to the large amount of dust attached to the casing not only the appearance of the vacuum cleaner is affected, but also the transparency of the original transparent material box is lowered, and the user cannot visually see the amount of dust and dirt deposited in the casing. Furthermore, it is not possible to determine at the right time whether the dust box should be cleaned to keep the vacuum cleaner operating normally.
  • It is an object of the present invention to provide a self-cleaning and non-sticky coating composition comprising a photocurable film forming coating and a photocatalyst.
  • This coating composition can easily form a coating containing a photocatalyst, and the resulting coating is thick and smooth in texture.
  • the coating formed from the coating composition of the present invention not only has the ability to be self-cleaning, but also has a non-sticking effect.
  • the photocatalyst comprises titanium dioxide.
  • the coating composition of the present invention may comprise a titanium dioxide precursor, wherein the titanium dioxide precursor is selected from the group consisting of alkyl titanates, titanium halides, alkyl halo titanates, fluorotitanic acid or hexafluorotitanium. Ammonium acid.
  • the photocurable film-forming coating comprises mainly a photoactive oligomer, a photoactive monomer and a photoinitiator, wherein the photoactive oligomer is preferably selected from the group consisting of unsaturated polyester resins, acrylated One or more of epoxy resin, polyurethane, polyester, polyether, and acrylated polyacrylate.
  • the coating composition of the invention may further comprise an organic antistatic agent.
  • the present invention also provides the use of the coating composition for forming a self-cleaning and non-stick coating, and a method of forming a self-cleaning and non-stick coating comprising applying on a substrate, preferably a plastic substrate.
  • the coating composition of the present invention is not limited to be used for forming a self-cleaning and non-stick coating.
  • the present invention also provides a dust collecting case for a vacuum cleaner, the inner wall of which is uniformly coated with a coating layer formed of the coating composition of the present invention.
  • FIG. 1 is a schematic structural view of a prior art vertical vacuum cleaner
  • FIG. 2 is a schematic exploded view of a conventional dust collector for a vacuum cleaner
  • FIG. 3A is an ABS substrate comprising the titanium dioxide coating of the present invention and a titanium dioxide-free coating. a comparative photograph of the ABS substrate of the layer before and after the dust (sand, copper powder, candle) is poured
  • FIG. 3B is a SEM photograph of the surface of the ABS substrate and the titanium dioxide coating of the present invention
  • Fig. 4 is a view showing a comparison of the dust-collecting effect of the dust collector dust box of the present invention and the dust collector dust box of the prior art.
  • the term "photocatalyst” refers to a catalyst capable of accelerating a photochemical reaction.
  • the photocatalyst produces a photochemical effect under the illumination of a specific band of light, which absorbs light energy equivalent to the band gap energy, so that the electrons acquire a certain amount of energy, and the electrons (e-) and the space are generated on the surface of the photocatalyst.
  • Hole (h+) pair These electron holes react with water or dissolved oxygen to produce hydroxide radicals ( ⁇ ) and super anion ions ( ⁇ 0).
  • These holes and hydroxide radicals have an oxidizing energy of more than 120 kcal/mol, and have a strong oxidizing ability, and can cut off all the chemical bonds constituting the organic molecules. Thereby, the photocatalyst achieves the function of purifying air, preventing dirt and deodorizing.
  • these electron (e-) and hole (h+) pairs on the surface of the photocatalyst are also capable of neutralizing the charged species near it. This effect can greatly alleviate the problem of electrostatic prevailing very common in the environment.
  • Common photocatalysts such as GaP, GaAs, ZnO, Sn0 2 , SrTi0 3 , W0 3 , Bi 2 0 3 ,
  • Ti0 2 titanium dioxide
  • Such titanium dioxide is mostly provided in nanometer scale, sometimes doped with certain metals such as nanosilver or other metal oxides.
  • the photocatalyst suitable for use in the present invention preferably comprises titanium dioxide, and the titanium dioxide may be nanoscale or micron-sized particles.
  • the titanium dioxide has an average particle size of from about 10 nm to about 20 ⁇ m, preferably from about 20 to about 500 nm, and most preferably about 40 nm.
  • photocatalysts can be widely applied to various fields, and when they are present in the form of a film, they can exert their effects more significantly.
  • the photocatalyst film forming technology in the prior art is complicated in process, and the film forming speed is slow, resulting in time-consuming and labor-consuming processing; or the film thickness formed is uneven, and since the photocatalyst particles are not completely compatible with the film forming materials used, The resulting film surface is rough and does not meet the required process standards.
  • the present inventors have unexpectedly discovered that when a known photocurable film-forming coating is used as a film-forming material of a photocatalyst, not only can a photocatalyst-containing coating be formed quickly and simply, Moreover, the formed coating has a thick thickness and a smooth texture.
  • the term "photocurable film-forming coating” refers to a coating that can be easily cured into a film under illumination, wherein the lighting conditions generally refer to providing visible or ultraviolet light, since light in these two bands is conveniently Obtained, thus saving costs.
  • Ultraviolet light is preferred because the photocurable film-forming coating can be cured more rapidly under the action of ultraviolet light.
  • other wavelength ranges of light may be used as long as they are illuminated under their illumination.
  • the coating can be polymerized to form a film. This photocuring is generally caused by the polymerization of oligomers in the coating composition under the action of light.
  • Such photocurable film-forming coatings are known which mainly comprise photoactive oligomers, photoactive monomers and photoinitiators, and the like.
  • the photoactive oligomer may be an unsaturated polyester resin, an acrylated epoxy resin, a polyurethane, a polyester, a polyether, and an acrylated polyacrylate, etc., because of its strong adhesion and chemical resistance.
  • the wettability of the pigment is good, and the acrylated epoxy resin is most widely used, but the acrylated polyurethane has excellent comprehensive properties.
  • These oligomers are cured by a free radical mechanism.
  • non-acrylate oligomers which cure to form a film by a cationic mechanism can also be used.
  • Hybrid oligomers having both an acrylate group which undergoes radical curing and a ethoxy group which undergoes cationic curing exhibit a good synergistic effect and are therefore preferred.
  • the photoactive monomer participates in the solidification of the film on the one hand and the photoactive oligomer which is more viscous on the other hand.
  • Such monomers contain structurally unsaturated double bonds such as (fluorenyl) acryloyl, vinyl, allyl and the like.
  • the photoinitiator functions to generate reactive groups such as active free radicals or reactive cations that initiate the curing reaction.
  • the radical photoinitiator includes, for example, benzoin, benzoin, acetophenone, thioxanthone, and the like.
  • the cationic photoinitiator includes, for example, a diazonium salt, a diaryl iodine salt: an aryl sulfonium salt, an alkyl sulfonium salt, an iron arene salt, a sulfonyl ketone, and a triaryl curing rate, etc., and can select a suitable combination of light. Reactive oligomers, photoactive monomers and photoinitiators.
  • the photocurable film-forming coatings suitable for use in the present invention are preferably cross-linked acrylic coatings such as epoxy-based acrylic resins, bisphenol A epoxy acrylates, acrylate-bisphenol A-epoxy hybrid oligomers, polyurethanes Acrylates and the like, some of which are photocurable film-forming coatings, are commercially available.
  • a class of primers typically used for UV oil glazing on paper surfaces is a photocurable film forming coating that is particularly suitable for use in the present invention.
  • This type of primer is generally referred to as a waterborne UV base oil (commercially available from suppliers such as Zhongshan Zhongqiao Coating Adhesive Co., Ltd., Yiwu Gunda Composites Co., Ltd.), and is usually used for UV oil coating on paper surfaces. Improve UV oil gloss and adhesion, and reduce the amount of UV oil to prevent paper explosion. It has good compatibility only with the photocatalyst, and the characteristics of the aqueous UV base oil rapidly solidifying under ultraviolet irradiation can be maintained.
  • the main components of the water-based UV base oil are acrylic resin oligomers, photoinitiators and auxiliaries such as photoactive monomers, etc. When it is subjected to radical chain reaction under ultraviolet irradiation, it rapidly cross-links polymerization, instantaneously (less than 1 second) Cured to form a film. In practical applications, a suitable aqueous UV base oil is often selected depending on the material of the substrate to be applied.
  • the aqueous UV base oil suitable for use in the present invention is preferably a water-based UV base oil for plastics or resins, including but not limited to WUB-3B (main component epoxy acrylate resin), WUV-3H (main component bisphenol A epoxy acrylate) , WCP-MB (main component acrylate-bisphenol A-epoxy hybrid oligomer) or EF-1037 (main component urethane acrylate). While the present invention preferably employs an aqueous UV base oil as the photocurable film-forming coating, it will be readily apparent to those skilled in the art that other photocurable film-forming coatings having similar compositions and properties to aqueous UV base oils are also suitable for use in the present invention.
  • WUB-3B main component epoxy acrylate resin
  • WUV-3H main component bisphenol A epoxy acrylate
  • WCP-MB main component acrylate-bisphenol A-epoxy hybrid oligomer
  • EF-1037 main component urethane acrylate
  • the coating composition of the present invention can easily apply a photo-curable photocatalyst to a substrate to form a film uniformly by including a photocurable film-forming coating.
  • This process can be realized by providing the optical radiation of the corresponding wavelength band at room temperature, eliminating the high-temperature heating process which is generally required in the prior art, thereby greatly simplifying the photocatalyst powder film forming process.
  • titanium dioxide When titanium dioxide is selected as the photocatalyst, it is present in the coating composition in an amount of from about 0.5% to about 255% by mass, preferably from about 3% to about 15%, more preferably from about 6% to 6%, most preferably about 5%. If the content of titanium dioxide is too high, it will cause particle agglomeration to affect the performance of the coating, but when the content is too low, the resulting coating is insufficient to provide the desired self-cleaning effect and non-sticking effect. As for the type of titanium dioxide, there are no particular restrictions, such as rutile type, anatase type and brookite type.
  • the coating composition of the present invention comprises titanium dioxide
  • the composition may further comprise a titanium dioxide precursor.
  • titanium dioxide precursor refers to a class of materials that can be converted to titanium dioxide under certain conditions.
  • these titanium dioxide precursors can be relatively easily converted into titanium dioxide.
  • the titania precursor be hydrolyzed, and the hydrolyzate other than titanium dioxide is preferably completely volatilized at room temperature or at a slightly elevated temperature.
  • titanium dioxide precursors satisfying such properties, including but not limited to alkyl titanates, alkyl halotitanates, titanium halides, fluorotitanic acid or ammonium hexafluorotitanate.
  • the alkyl group in the alkyl titanate is preferably a dc 6 alkyl group, more preferably a dC 4 alkyl group. Examples thereof may be bismuth titanate, ethyl titanate, n-propyl titanate, isopropyl titanate, n-butyl titanate, isobutyl titanate or t-butyl titanate or a combination thereof, preferably titanic acid N-butyl ester.
  • the alkyl group in the alkyl titanate may be partially substituted with a lanthanide to form an alkyl titanate, which is preferably a decyl trichlorotitanate, an ethyl trichlorotitanate or a n-propyl trichlorotitanate. Ester, isopropyl trichlorotitanate or n-butyl Trichlorotitanate. Said! Titanium includes, but is not limited to, titanium tetrafluoride, titanium tetrachloride or titanium dichloride.
  • Suitable hydrolysis conditions can be readily determined based on the selected titanium dioxide precursor.
  • an aqueous solution of boric acid is generally used as a scavenger for the F atom therein, thereby accelerating the progress of hydrolysis of ammonium hexafluorotitanate.
  • n-butyl titanate since it is rapidly hydrolyzed by water, it is usually first diluted with n-butyl titanate by adding an organic solvent such as ethanol, and then slowly added with water for hydrolysis to prevent precipitation of titanium dioxide.
  • the specific amount of the titanium dioxide precursor is such that it satisfies the range of titanium dioxide content in the above final coating composition.
  • the inventors have unexpectedly discovered that when a photocurable film-forming coating is used in combination with a titanium dioxide precursor, a coating that is more uniformly distributed in the coating can be obtained after curing, and this uniform distribution directly brings the The coating provides the benefit of better self-cleaning and non-sticking effects. Without wishing to be bound by any theory, it is speculated that this may be due to the use of the titanium dioxide precursor such that the added titanium dioxide particles act as a crystallization inducer, whereby the titanium dioxide particles in the final cured coating are substantially derived from the hydrolysis of the titanium dioxide precursor; apparently, this The hydrolyzed titanium dioxide particles can be more evenly distributed in the coating. Moreover, the titanium dioxide precursor has better compatibility with the photocurable film-forming coating itself.
  • the presence of a photocurable film-forming coating can relatively shorten the hydrolysis time of the titanium dioxide precursor, which is more efficient and faster than the conventional titanium dioxide coating process, which may benefit from the synergy of the photocurable film-forming coating with the titanium dioxide precursor.
  • the preparation process of the coating composition preferably first mixes the titanium dioxide precursor which has been optionally diluted with the solvent with the photocurable film-forming paint, and adds a small amount of titanium oxide particles while continuously stirring.
  • the post-added titanium dioxide particles can act as a crystallizing inducer to promote hydrolysis of the titanium dioxide precursor to form titanium oxide and form a film.
  • the coating thus formed has a two-layer structure, the underlayer is mainly an organic layer formed by curing of a photocurable film-forming coating, and the upper layer is mainly a functional layer of titanium dioxide particles formed by hydrolysis of a titanium dioxide precursor.
  • Such a two-layer structure can better exert self-cleaning and non-dusting effects because the titanium dioxide particles are mainly distributed on the outer surface.
  • organic antistatic agent may be added thereto.
  • organic antistatic agents can be used in the present invention, but are preferably polyoxyethylene ether systems, such as polystyrene type, PEG type, polyamide or polyester amide, decyloxy polyethylene glycol methacrylate.
  • Such organic antistatic agents are readily commercially available, including But not limited to KJD-1, KJD-2, KJD-5, KJD-8, KJD-18, KJD-195, KJD-1210, KJD-730, HKD-321, HKD-230, HKD-200, HKD- 510 or JZ.
  • the order of addition of the components is not particularly limited, and in the case of using the titanium oxide precursor, it is preferred to slowly add a small amount of titanium oxide particles during the process of continuously stirring the photocurable film-forming coating and the titanium dioxide precursor.
  • Aqueous organic solvents other than water may be used in the mixing process according to actual needs, provided that these solvents are completely volatilized in the formation of the coating. Examples of the organic solvent are ethanol, furfural, acetone, propanol and the like.
  • the coating compositions of the present invention can be formed by coating techniques well known in the art, such as spray coating, roll coating, brush coating, spin coating, wash coating, and the like, to form a uniform coating on the substrate.
  • the carrier material as the coating may be an inorganic material such as glass, ceramic, metal, or an organic material such as plastic, paper, wood, etc.
  • a preferred carrier material is a transparent plastic such as polyacrylonitrile.
  • Ester ester ⁇ , commonly known as acrylic or plexiglass
  • PC polycarbonate
  • PET polyethylene terephthalate
  • AS acrylonitrile-styrene copolymer
  • ABS propylene Nitrile-butadiene-styrene copolymer
  • PSF polysulfone
  • PP polypropylene
  • the self-cleaning and non-stick coatings of the present invention are widely used and can be applied to the surface of walls, other coatings, wallpapers (cloths), plastics, marbles, glass, ceramics, tiles, carpets, etc., thereby imparting these Strong surface sterilization, deodorization, purification, self-cleaning and non-stick effect. If it is desired that the coating of the present invention exerts a self-cleaning effect more excellently, it is preferred to provide a certain wavelength of illumination.
  • the light source that is most easily available is sunlight.
  • the coating of the present invention can be used as a casing coating for a dust collector of a vacuum cleaner.
  • the coating of the present invention when the cleaner is in operation, the coating of the present invention is present on the inner wall of the casing (wherein the presence of the photocatalyst allows the coating to function as a conductive layer), thereby reducing the inner surface of the casing.
  • the resistivity causes the static charge generated on the dust box to leak quickly and in time, reducing the amount of static charge on the dust box, so as to prevent the dust sucked into the dust box from being firmly adsorbed in the box under the action of static electricity.
  • the wall affects the internal visibility of the box.
  • the surface of the coating material has a certain lubricity, which reduces the coefficient of friction, thereby suppressing and reducing the generation of static charges, and making the adhesion of dust more difficult.
  • the casing of the dust collector dust box coated with the coating of the present invention is substantially free of dust, thereby greatly facilitating the dust removal of the vacuum cleaner.
  • the coating composition of the present invention can be directly applied to the casing of its dust box during the manufacture of the vacuum cleaner without any equipment modification or renewal of the existing vacuum cleaner production line.
  • Existing vacuum cleaners are classified into vertical vacuum cleaners, horizontal vacuum cleaners, and portable vacuum cleaners. 1 is a schematic view showing the appearance of a prior art vertical vacuum cleaner.
  • the upright vacuum cleaner includes the following parts: a suction nozzle 60 that sucks in air containing foreign matter as the bottom surface moves; a body 70 in which an attraction generating device that sucks foreign matter-containing air through the suction nozzle 60 is built therein
  • the handle 72 is provided on the upper portion of the body 70 for the user to use the vacuum cleaner.
  • the suction nozzle 60 is a portion that takes in air through a suction port formed on the bottom surface.
  • the suction nozzle 60 has a suction port formed by a suction nozzle bottom cover 60' at the bottom and a nozzle dust collecting cover 60" provided at the upper portion, and a suction passage for external air is formed in the nozzle bottom cover 60'.
  • the moving wheels 62 which can move the fuselage 70 easily are provided on both sides of the suction nozzle 60.
  • the body 70 is rotatable over a range of angles.
  • the body 70 is rotatably coupled to the rear of the nozzle 60 within a certain range of inclination.
  • the rear end portion of the nozzle 60 is provided with a rotation control plate 64.
  • the body 70 is tilted rearward. In this way, the user can adjust the angle of the body 70 according to his or her height to clean the ground.
  • a power cord hook 71 is formed at the rear of the body 70, and the power cord hooks 71 are formed symmetrically with each other at the rear upper and lower portions of the body 70. Such a pair of power cord hooks 71 are wound around the stored power cord C.
  • the inside of the body 70 is provided with an attractive motor, and the outside air and foreign matter are sucked through the suction nozzle 60.
  • the foreign matter sucked by the suction nozzle 60 passes through the rear of the body 70, and flows into the dust collecting case 10 by a suction hose made of a soft material.
  • the front side of the body 70 is formed with a dismounting button 76 for taking out the dust box 10 to the outside of the body 70, and a dust box seating portion 78 recessed toward the rear of the body 70. That is, the inside of the dust box housing portion 78 is provided with a dust box 10, and when the separation button 76 is pressed during separation, the dust box 10 can be separated from the body 70.
  • the rear of the dust box housing portion 78 is provided with a casing exhaust chamber 80 having an air inflow passage, and the casing exhaust chamber 80 communicates with the exhaust hole 20 of the dust box 10, and has a prevention between the dust box 10 and the motor.
  • the role of air leakage. Therefore, the casing exhaust chamber 80 is made of a material having a certain elasticity.
  • the front bottom of the fuselage 70 is provided with a user for selectively illuminating the front of the vacuum cleaner Bright lighting L, so you can use this when cleaning the darker parts such as the bottom of the table or the corner
  • the right side of the illuminating lamp L is provided with a lead-out portion 79 through which the air filtered by the dust collecting case 10 passes through the casing venting chamber 80 to the outside of the body 70.
  • the inside of the lead-out portion 79 is further provided with an exhaust filter (not shown), that is, the exhaust filter re-filters foreign matter in the air discharged to the outside (indoor space), and discharges more comfortable air into the indoor space. .
  • FIG. 2 is a schematic exploded view of a dust box for a vacuum cleaner in the prior art.
  • the dust box 10 provided can be separated from the inside of the dust box housing portion 78 to the outside, and the foreign matter in the air sucked from the suction nozzle 60 can be filtered.
  • the dust box 10 generally filters foreign matter by vortexing, or filters foreign matter by setting a filter, or simultaneously collects foreign matter into the inside by means of a vortex method or a filter.
  • the dust box 10 is configured as follows: a drum-shaped casing 11 that is sealed below and is empty inside; a dust collecting cover 12 that seals the inside thereof is formed on the upper surface of the casing 11; and is detachably attached to the lower portion of the dust collecting cover 12 A filter assembly 17 that filters foreign matter into the inside of the casing 11 is provided.
  • the surface side of the dust collecting cover 12 is selectively controlled by the detaching button 76 so that the dust box 10 does not come off the loading and unloading groove 12a provided in the body 70.
  • the loading and unloading groove 12a has a recess of a certain depth and can be integrated with the dust collecting cover 12.
  • the lower side of the dust collecting cover 12 is provided with a filter assembly 17, and filters the fine dust flowing into the foreign matter inside the dust collecting case 10.
  • the filter assembly 17 is detachably disposed on the bottom surface of the dust collecting cover 12, and the inside of the filter assembler 17 is in communication with the outlet pipe 18. That is, the air that has flowed in from the outer circumferential surface of the filter assembly 17 is led out to the outside of the dust collecting case 10 through the outlet pipe 18.
  • the filter assembly 17 has a strong air flow, it is preferable to select a material that can maintain its original shape in order to ensure a certain strength. It is made of a plastic material which can pass the substance selectively, for example, made of a polyester fiber material.
  • the upper end portion of the casing 11 forms a suction guide portion 14.
  • the suction guide portion 14 is led out to a predetermined portion at the outer end of the casing 11, and guides the air flowing in the inside of the casing 11 to flow in the tangential direction along the inner wall of the casing 11. Accordingly, the suction guide portion 14 is formed obliquely on the outer surface of the casing 11.
  • the opposite side outer peripheral wall of the suction guide portion 14 is formed with a handle 15 that protrudes outward.
  • the handle 15 is provided for the convenience of the user to detach the dust box 10 from the body 70 of the vacuum cleaner.
  • the separation plate 16 that divides the internal space of the casing into upper and lower portions is further provided.
  • the outer peripheral surface of the separating plate 16 is provided with a dust-receiving portion 16a that allows the upper portion and the lower portion of the casing 11 to communicate with each other, and the foreign matter that flows into the casing 11 causes the heavy foreign matter to fall. That is, the foreign matter having a large mass falls through the dust falling portion 16a and is deposited on the lower side of the casing 11.
  • a central portion of the separating plate 16 forms a filter communication hole 16b.
  • the suction duct 18 communicates with the inside of the filter assembly 17, and the air purified by the filter assembly 17 flows into the suction duct 18.
  • the lower portion of the casing 11 is provided with a discharge pipe 18 connected to the vent hole 20.
  • the outlet pipe 18 has a function of guiding the air purified by the filter assembly 17 to the lower side of the casing 11.
  • the end of the outlet pipe 18, that is, the vent hole 20 is in surface contact with the casing exhaust chamber 80, so that the air is not leaked.
  • n-butyl titanate was taken and mixed with 97 g of aqueous UV base oil WUV-3B, and diluted with ethanol in a volume ratio of 1:1.
  • aqueous UV base oil WUV-3B aqueous UV base oil
  • ethanol aqueous UV base oil
  • hydrophilic nano titanium dioxide Hangzhou Wanjing New Material Co., Ltd., model VK-T25H
  • the mixture was further stirred for 3 hours to obtain a titanium oxide sol.
  • the entire process was carried out in a water bath at approximately 65 °C. After 12 hours of aging, the resulting solution was uniformly applied to an ABS substrate and irradiated with ultraviolet light having a wavelength of about 365 nm for 1 second. It can be seen that the coating mixture forms a uniform coating on the ABS substrate.
  • the resulting mixture was uniformly applied onto a PC substrate, allowed to stand for 45 hours, and then irradiated with ultraviolet light having a wavelength of about 365 nm for 1 second. It can be seen that the coating mixture forms a uniform coating on the PC substrate.
  • n-propyl titanate was mixed, and it was mixed with 93 g of aqueous UV base oil EF-1037, diluted with propanol in a volume ratio of 1:1, and then 3 g of an antistatic agent KJD-730 was added.
  • aqueous UV base oil EF-1037 diluted with propanol in a volume ratio of 1:1
  • an antistatic agent KJD-730 was added.
  • 0.5 g of hydrophilic nano-titanium dioxide (Hangzhou Wanjing New Material Co., Ltd., model VK-TA18H) was added as a crystallization inducer, and about 25 ml of deionized water was slowly added dropwise. After completion of the dropwise addition, the mixture was further stirred for 3 hours to obtain a titanium oxide sol.
  • the entire process was carried out in a water bath at approximately 60 °C. After 12 hours of aging, the resulting solution was hook coated onto a PP substrate and irradiated with ultraviolet light having a
  • fluorotitanate was prepared and prepared into an aqueous solution of about 0.1 mol/1, and mixed with a 0.21 mol/1 boric acid aqueous solution in a volume ratio of 1:1, and then 83 g of a water-based UV base oil WUV-3H and 2 g of antistatic were added.
  • Agent JZ Under continuous stirring, lg hydrophilic nano-titanium dioxide (Hangzhou Wanjing New Material Co., Ltd., model VK-TA18H) was added as a crystallization inducer, and stirring was continued for 3 hours to obtain a mixed solution.
  • the resulting mixture was uniformly applied onto a PC substrate, allowed to stand for 45 hours, and then irradiated with ultraviolet light having a wavelength of about 365 nm for 1 second. It can be seen that the coating mixture forms a uniform coating on the PC substrate.
  • the ABS substrate with the titanium dioxide coating prepared in the three parts of Example 2 was covered with sand, copper powder and candle oil, respectively, and then the dust was poured off.
  • the same treatment was applied to the ABS substrate without the titanium dioxide coating.
  • a photograph of the two substrates before and after the dust is poured is shown in Fig. 3A, and it can be seen that the titanium dioxide coating of the present invention has a good non-sticking effect on the three types of dust.
  • the effect of copper powder does not seem to be significant, because the copper powder itself does not easily adhere to the ABS surface.
  • this self-cleaning and non-sticking effect of the titanium dioxide coating of the present invention is caused by the dense titanium dioxide layer formed on the surface of the substrate.
  • the titanium dioxide coating of the present invention has formed a structure on the surface of the substrate which is completely different from the surface of the original substrate.
  • the coating prepared in Example 2 was used as a coating for the inner wall of the dust collecting box of a vacuum cleaner, and compared with a dust box of an existing vacuum cleaner. It can be observed from Fig. 4 that after the dust enters the dust collecting box of the present invention, it automatically falls into the bottom of the dust, and the inside is less adhered; after the pouring, the dust is almost completely poured out. The dust adhering to the inside of the dust box is further collected and weighed. As a result, it was found that the dust adsorbed inside the dust box having the coating prepared in Example 2 was much less collected than the dust collected from the dust box having the general antistatic material under the same conditions.
  • the coatings containing no antistatic agent in Examples 1-3 of the present invention achieved even better results when compared with the dust collector dust box of the prior art with a general antistatic material.
  • the above description is only a preferred embodiment of the invention and is not intended to limit the invention in any way.
  • the data or data ranges disclosed above can be reasonably combined.
  • the features disclosed above may also be combined in a reasonable manner, and the technical solution constituted by such a combination is obviously still within the scope of the present invention.
  • any person skilled in the art will certainly make some modifications or modifications using the disclosed technical content without departing from the technical scope of the present invention.

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Description

涂料组合物及其应用 技术领域
本发明涉及一种涂料组合物,更具体地涉及一种含有光触媒的自 清洁和不粘尘的涂料组合物以及该涂料组合物用于形成涂层的用途, 例如在内壁表面含有所述涂层的吸尘器集尘盒。
背景技术
光触媒可以有效地降解曱醛、 苯、 曱苯、 二曱苯、 氨等污染物, 并具有高效广谱的消毒性能,能将细菌或真菌译放出的毒素分解及无 害化处理。 二氧化钛是最常用的一种光触媒, 它具有自洁性, 在光线 的作用下产生强烈催化降解功能, 有效地降解空气中有毒有害气体, 杀灭多种细菌, 将细菌或真菌译放出的毒素分解及无害化处理, 同时 它还具备除臭、 抗污等功能。
光触媒的上述作用在其以薄膜态存在时更显著,远高于以粉体态 存在的形式。但是, 现有技术中光触媒成膜技术都存在这样或那样的 缺点: 或者由于制备过程中涉及大量的水和有机物, 所制备的薄膜在 干燥过程中容易引起龟裂, 限制了所制备膜的厚度; 或者在控制光触 媒颗粒尺寸的大小中存在孔径匹配的问题。
因此, 需要一种将光触媒有效成膜的技术。
另一方面, 吸尘器是一种室内清洁卫生的家用电器, 用于清除地 面、 地毯、 墙壁、 家具、 衣物及各种缝隙中的灰尘。 一般来说, 吸尘 器主要包括抽吸装置和吸入管路,以电动机和风机为主形成的抽吸装 置设置在机体内, 吸入管路包括吸头和吸气管, 吸头有向下开口的吸 气口并通过吸气管的伸缩管和软管与机体内风机的进风口相通。
吸尘器运转时, 电动机带动风机的叶轮高速旋转, 将吸尘器内部 的空气排出去, 在吸尘器的内部形成瞬时真空, 与外界大气之间形成 一个相当高的负压差。 在此负压差的作用下, 吸头附近的灰尘连同空 气一起通过吸气口吸入机体内的集尘盒内。含有灰尘的空气在机体的 集尘盒内经过滤后, 再从出气口排出到吸尘器外部。 这样, 就达到清 除灰尘、洁净地面的效果。吸尘器的吸率分为多个可操作控制的挡次, 适应地面、 床面、 地毯、 沙发、 墙角等不同清洁对象的作业面, 以便 更好地抽吸各处的灰尘。
但是, 在现有技术的吸尘器的集尘盒中, 盒体的内壁容易在吸尘 器的使用中附着大量的灰尘, 在吸尘器清理集尘盒时, 由于静电的吸 引灰尘并不易与盒体的内壁脱离, 从而导致集尘盒的清理困难, 给使 用者带来不便。 另一方面, 由于盒体上附着大量灰尘, 不但影响吸尘 器的美观, 而且还会造成原本透明材质的盒体的透明度下降, 使用者 无法直观地看到盒体内的灰尘和污物的沉积量,进而无法适时确定是 否应该清理集尘盒以保持吸尘器正常运行。
因此, 还存在一种对有效减少吸尘器集尘盒盒体粘尘问题的需 要。
发明内容 ^ 明。
本发明的目的是提供一种自清洁和不粘尘的涂料组合物,其包含 光固化成膜涂料和光触媒。这种涂料组合物可以容易地形成含有光触 媒的涂层, 并且所形成的涂层厚度均勾、 质地光滑。
本发明人意外地发现 ,由本发明的涂料组合物形成的涂层不仅具 有自清洁的能力, 而且具有不粘尘的效果。
根据本发明的一方面, 光触媒包含二氧化钛。 在这种情况下, 本 发明的涂料组合物可以包含二氧化钛前体,其中所述二氧化钛前体选 自钛酸烷基酯、 卤化钛、 卤代钛酸烷基酯、 氟钛酸或六氟钛酸铵。
根据本发明的另一方面,上述光固化成膜涂料主要包含光活性低 聚体、 光活性单体和光引发剂, 其中所述光活性低聚体优选选自不饱 和聚酯树脂, 丙烯酸化的环氧树脂、 聚氨酯、 聚酯、 聚醚以及丙烯酸 化聚丙烯酸酯中的一种或多种。
根据本发明的另一方面,本发明的涂料组合物还可以包含有机抗 静电剂。
本发明还提供了所述涂料组合物用于形成自清洁和不粘尘涂层 的用途, 以及一种形成自清洁和不粘尘涂层的方法, 包括在基材, 优 选塑料基材上施加本发明的涂料组合物。
本发明还提供一种吸尘器的集尘盒,所述集尘盒的盒体内壁上均 匀涂布有由本发明的涂料组合物所形成的涂层。
附图说明
图 1是现有技术中立式真空吸尘器的外观结构示意图; 图 2是现有技术中真空吸尘器用集尘盒分解结构示意图; 图 3A是包含本发明二氧化钛涂层的 ABS基体与不含二氧化钛涂 层的 ABS基体在灰尘 (沙土、 铜粉、 蜡烛)倾倒前后的对比照片; 图 3B是 ABS基体表面和本发明二氧化钛涂层的 SEM照片; 以及 图 4是本发明的吸尘器集尘盒与现有技术中的吸尘器集尘盒的 粘尘效果比较图。
具体实施方式
本文中, 术语"光触媒 "指的是能够加速光化学反应的催化剂。 光 触媒在特定波段光线的照射下产生光化学效应,它吸收相当于带隙能 量以下的光能, 使其电子获取一定的能量,脱离原子核及电子轨道的 是光触媒表面产生很多电子 (e-)和空穴 (h+)对。这些电子 空穴能与水 或溶存的氧反应, 产生氢氧根自由基(·ΟΗ )和超级阴氧离子(·0 )。 这些空穴和氢氧根自由基的氧化能大于 120kcal/mol, 具有艮强的氧 化能力, 几乎能将所有构成有机物分子的化学键切断分解。 由此光触 媒达到净化空气、 抗污除臭的作用。
另外,光触媒表面的这些电子 (e-)和空穴 (h+)对还能够中和靠近它 的带电荷物质。这种作用可以大大减轻环境中非常普遍存在的静电不 利影响的问题。
常用光触媒例如 GaP、 GaAs、 ZnO、 Sn02、 SrTi03、 W03、 Bi203
Fe203和 Ti02等, 其中最广泛使用的是二氧化钛(Ti02 )。 这种二氧 化钛多以纳米级提供,有时还掺杂某些金属如纳米银或其它金属氧化 物。
适用于本发明的光触媒优选包含二氧化钛,并且二氧化钛可以是 纳米级或微米级颗粒。优选二氧化钛的平均粒径为约 10nm-约 20μιη, 优选约 20-约 500nm, 最优选约 40nm。
如上述, 光触媒可以广泛地应用于各种领域, 而且当它们以薄膜 形式存在时能够更显著地发挥其作用。 但是, 现有技术中的光触媒成 膜技术要么工艺复杂, 成膜速度緩慢导致耗时耗工; 要么所形成的膜 厚度不均, 并且由于光触媒颗粒不能与所用成膜材料完全相容, 以至 于最终的膜表面粗糙, 不能达到所需的工艺标准。 本发明人正是在致 力于克服这些缺陷的努力中,意外地发现当一种已知的光固化成膜涂 料用作光触媒的成膜材料时,不仅能够快速简单地形成含有光触媒的 涂层, 而且所形成的涂层厚度均勾, 质地光滑。
本文中, 术语"光固化成膜涂料"是指在光照下能够容易地固化而 成膜的涂料, 其中所述光照条件一般是指提供可见光或紫外光, 因为 这两种波段的光可方便地获得, 从而节约成本。 由于在紫外光的作用 下, 光固化成膜涂料能够更加迅速地发生固化而成膜, 因此优选紫外 光。 但是, 也可以采用其它波长范围的光, 只要在它们的照射下所述 涂料能够发生聚合, 从而固化成膜即可。 这种光固化一般是因为所述 涂料成分中的低聚体在光照作用下发生聚合反应而引起的。
这类光固化成膜涂料是已知的, 其主要包含光活性低聚体、 光活 性单体和光引发剂等。
所述光活性低聚体可以是不饱和聚酯树脂, 丙烯酸化的环氧树 月旨、 聚氨酯、 聚酯、 聚醚以及丙烯酸化聚丙烯酸酯等, 其中由于其附 着力强、抗化学腐蚀并且对颜料的润湿性好, 丙烯酸化环氧树脂最广 泛使用, 但丙烯酸化聚氨酯综合性能优良。 这类低聚体都是以自由基 机理固化成膜。 当然, 也可以使用以阳离子机理固化成膜的非丙烯酸 酯低聚体。既具有发生自由基固化的丙烯酸酯基团又具有发生阳离子 固化的乙婦基团的杂化低聚体更是表现出良好的协同效应,因而也优 选。
所述光活性单体一方面参与固化成膜,另一方面对粘度较大的光 活性低聚体进行稀释。这种单体在结构上含有不饱和双键,如(曱基) 丙烯酰基、 乙烯基、 烯丙基等。
所述光引发剂的作用是产生引发固化反应的活性基团如活性自 由基或活性阳离子。 自由基光引发剂例如包括安息香类、 苯偶姻类、 苯乙酮类、 硫杂蒽酮类等。 阳离子光引发剂例如包括重氮盐、 二芳基 碘输盐:: 芳基硫 ^盐、 烷基硫鴒盐、 铁芳烃盐、 磺酰 基酮及三芳 固化速度等因素, 能够选择合适组合的光活性低聚体、 光活性单体和 光引发剂。
适用于本发明的光固化成膜涂料优选交联型丙烯酸类涂料,例如 环氧基丙烯酸树脂、 双酚 A环氧丙烯酸酯、 丙烯酸酯 -双酚 A-环氧树 脂杂化低聚物、 聚氨酯丙烯酸酯等, 其中一些光固化成膜涂料可直接 商购。
本发明人意外地发现一类通常专用于纸张表面 UV油上光的打底 油是特别适用于本发明的光固化成膜涂料。 这种打底油一般称作水性 UV底油 (可从供应商例如中山市中侨涂料粘胶有限公司、 义乌高达 复合材料有限公司等商购), 通常专用于纸张表面 UV油上光, 以提 高 UV油光泽度和附着力,并减少 UV面油用量而防止爆纸现象产生。 仅对光触媒具有良好的相容性, 而且水性 UV底油在紫外线照射下迅 速固化成膜的特性能够保持。 这种良好的相容性确保了所形成的涂层 质地均勾光滑。 水性 UV底油的主要成份是丙烯酸类树脂低聚物、 光引发剂和助 剂例如光活性单体等, 当它在紫外线照射下能发生自由基链式反应, 迅速交联聚合, 瞬间 (小于 1秒) 固化成膜。 实际应用中, 往往根据 待施涂基体的材质来选择适合的水性 UV底油。 适用于本发明的水性 UV底油优选塑料或树脂用水性 UV底油,包括但不限于 WUV-3B(主 要成分环氧基丙烯酸树脂)、 WUV-3H (主要成分双酚 A环氧丙烯酸 酯)、 WCP-MB (主要成分丙烯酸酯 -双酚 A-环氧树脂杂化低聚物 )或 EF-1037 (主要成分聚氨酯丙烯酸酯)等。 尽管本发明优选使用水性 UV底油作为所述光固化成膜涂料, 但是本领域技术人员很容易想到 其它与水性 UV底油具有类似组成和性质的光固化成膜涂料也适用于 本发明。
本发明的涂料组合物通过包含光固化成膜涂料,可以容易地将一 般呈粉末状的光触媒施涂到基体上均匀成膜。该过程只需在室温下提 供相应波段的光辐射即可实现,省去现有技术中一般必须的高温加热 工序, 从而大大简化了光触媒粉末成膜工艺。
当选定二氧化钛作为光触媒时,它在涂料组合物中的含量按质量 计约为 0.5 %至 25 % , 优选约 3 %至 15 % , 更优选约 4 %至 6 % , 最 优选约 5 %。 如果二氧化钛的含量太高, 会引起颗粒团聚而影响涂层 的性能, 但当含量太低时, 所制得的涂层又不足以提供所期望的自清 洁作用和不粘尘效果。 至于二氧化钛的种类, 没有特别限制, 例如金 红石型、 锐钛矿型和板钛矿型都可以。
当本发明的涂料组合物包含二氧化钛时,该组合物还可以包含二 氧化钛前体。
在本文中, 术语"二氧化钛前体"指在一定条件下可以转化为二氧 化钛的一类物质。考虑到本发明的涂料组合物最终要以简单的工艺转 化为含二氧化钛的涂层,优选这些二氧化钛前体能够相对容易地转化 成二氧化钛。 这种情况下, 优选二氧化钛前体能够水解, 并且二氧化 钛以外的水解产物最好在室温或稍微升高的温度下能够全部挥发掉。
满足这种性状的二氧化钛前体很多, 包括但不限于钛酸烷基酯、 卤代钛酸烷基酯、 卤化钛、 氟钛酸或六氟钛酸铵等。 所述钛酸烷基酯 中的烷基优选 d-c6烷基, 更优选 d-C4烷基。 其例子可以是钛酸曱 酯、 钛酸乙酯、 钛酸正丙酯、 钛酸异丙酯、 钛酸正丁酯、 钛酸异丁酯 或钛酸叔丁酯或其组合, 优选钛酸正丁酯。 所述钛酸烷基酯中的烷基 可以部分替换为 素而成为 代钛酸烷基酯, 其优选曱基三氯钛酸 酯、 乙基三氯钛酸酯、 正丙基三氯钛酸酯、 异丙基三氯钛酸酯或正丁 基三氯钛酸酯。 所述! ¾化钛包括但不限于四氟化钛、 四氯化钛或二氯 化钛。
根据所选定的二氧化钛前体, 可以容易地确定合适的水解条件。 例如, 当使用六氟钛酸铵作为二氧化钛前体时, 一般还会使用硼酸水 溶液作为其中 F原子的夺取剂,从而加速六氟钛酸铵水解的进行。 当 使用钛酸正丁酯时, 由于其遇水即快速水解, 所以通常先加入有机溶 剂如乙醇等将钛酸正丁酯稀译, 再緩慢加入水进行水解, 以防止二氧 化钛沉淀生成。二氧化钛前体的具体用量要满足上述最终涂料组合物 中的二氧化钛含量范围。
本发明人意外地发现当将光固化成膜涂料与二氧化钛前体联合 使用时, 固化后可以获得二氧化钛更均勾地分布在所述涂料中的涂 层,而且这种均匀分布直接带来所述涂层能提供更好的自清洁和不粘 尘效果的益处。 不希望囿于任何理论, 推测这可能是由于二氧化钛前 体的使用使得所加入的二氧化钛颗粒充当结晶诱导剂,由此最终固化 涂层中的二氧化钛颗粒基本来源于二氧化钛前体水解所得; 显然, 这 种水解得到的二氧化钛颗粒能够更均勾地分布在涂料中。 而且, 二氧 化钛前体与光固化成膜涂料本身就具有更好的相容性。 另一方面, 光 固化成膜涂料的存在能相对缩短二氧化钛前体水解的时间 ,从而比传 统的二氧化钛镀膜工艺更高效快速 ,这可能得益于由于光固化成膜涂 料与二氧化钛前体的协同作用。
在本发明中, 如果使用二氧化钛前体, 涂料组合物的制备工艺优 选先将任选已被溶剂稀释的二氧化钛前体与光固化成膜涂料混合,在 不断搅拌的同时加入少量二氧化钛颗粒。 这种条件下, 后加入的二氧 化钛颗粒可以充当结晶诱导剂, 从而促进二氧化钛前体水解, 生成二 氧化钛并成膜。 由此形成的涂层具有两层结构, 底层主要是光固化成 膜涂料固化形成的有机层,上层主要是二氧化钛前体水解形成的二氧 化钛粒子功能层。这样的两层结构由于二氧化钛粒子主要分布在外表 面, 从而能够更好地发挥自清洁和不粘尘的作用。
为了进一步增强本发明涂料组合物的抗静电效果,可以在其中添 加有机抗静电剂。 常用的有机抗静电剂都可以用于本发明, 但优选与 聚醚型如' PEG型,、^括聚酰胺或聚酯酰胺的聚氧乙烯醚体系, 曱氧 基聚乙二醇曱基丙烯酸酯共聚物等; 离子型, 它是通过高分子化学反 应将小分子盐类引入高分子侧基得到的, 如季铵盐型和横酸盐型, 并 且它们可以单独或组合使用。 这类有机抗静电剂可以容易地商购, 包 括但不限于 KJD-1、 KJD-2、 KJD-5、 KJD-8、 KJD-18、 KJD-195 , KJD-1210 , KJD-730 , HKD-321、 HKD-230 , HKD-200 , HKD-510 或 JZ。
Figure imgf000008_0001
们之间的均质化。 混合过程中, 各成分的添加顺序没有特别限制, 只 是在使用二氧化钛前体的情况下,优选在不断搅拌光固化成膜涂料和 二氧化钛前体的过程中緩慢加入少量二氧化钛颗粒。可以根据实际需 要在混合过程中使用水以外的水性有机溶剂,前提是这些溶剂在涂层 形成中能够完全挥发掉。 所述有机溶剂的例子有乙醇、 曱醛、 丙酮、 丙醇等。 在这些组分充分混合之后, 通过施加光辐射如紫外光完成固 化成膜。
本发明的涂料组合物可以通过本领域熟知的涂布技术实现,例如 喷涂、 辊涂、 刷涂、 旋涂、 洗涂等在基体上形成均勾涂层。
作为涂层的载体材料可以是例如玻璃、 陶瓷、金属之类的无机材 料, 或者是例如塑料、 纸张、 木材之类的有机材料 本发明中, 优选 的载体材料是透明塑料, 例如聚曱基丙烯酸曱酯(ΡΜΜΑ, 俗称压克 力或有机玻璃)、 聚碳酸酯 (PC )、 聚对苯二曱酸乙二醇脂 (PET )、 透明尼龙、 丙烯腈-苯乙烯共聚物(AS )、 丙烯腈-丁二烯 -苯乙烯共聚 物 (ABS )、 聚砜(PSF )、 聚丙烯(PP )等材质。
本发明的这种自清洁和不粘尘涂层应用广泛, 可以施涂到墙壁、 其它涂料、 壁纸(布)、 塑料、 大理石、 玻璃、 陶瓷器物、 瓷砖、 地 毯等的表面上, 从而赋予这些表面强大的杀菌、 除臭、 净化、 自洁以 及不粘尘的效果。 如果希望本发明涂层更优异地发挥自清洁作用, 则 优选提供一定波段的光照。 最容易获得的光源是太阳光。
特别地, 本发明的涂层可以作为吸尘器集尘盒的盒体涂层。 通过 应用本发明的这种涂层, 当吸尘器工作时, 由于盒体内壁上存在本发 明的涂层(其中光触媒的存在使得该涂层可以起到导电层的作用 ), 从而降低了盒体内表面的电阻率,使集尘盒上已经产生的静电荷及时 迅速泄漏, 降低集尘盒上的静电荷保有量, 以避免吸入到集尘盒中的 灰尘在静电的作用下牢固的吸附在盒体内壁上影响到盒体的内部可 视性。 另外, 涂层材料表面具有一定的润滑性, 降低了摩擦系数, 从 而抑制和减少静电荷的产生, 也使灰尘的附着更加困难。 涂有本发明 涂层的吸尘器集尘盒的盒体基本不粘着灰尘,从而大大方便了吸尘器 的灰尘清除。 本发明的涂料组合物可以在吸尘器的制造过程中直接涂布到其 集尘盒的盒体上 ,不需要对现有吸尘器生产流水线进行任何设备改造 或更新。 现有吸尘器按照外形分类, 可分为立式吸尘器、 卧式吸尘器 和便携式吸尘器等。图 1是现有技术中立式真空吸尘器的外观结构示 意图。
如图所示, 立式真空吸尘器是包括以下几部分: 随着底面移动吸 入含异物质的空气的吸嘴 60; 内置有通过吸嘴 60吸入含异物质空气 的吸引力产生装置的机身 70; 设置在机身 70上部, 供使用者使用吸 尘器时可把持的把手 72。
吸嘴 60是通过形成在底面的吸入口吸入空气的部分。吸嘴 60的 外观是由具备在底部的吸嘴底盖 60'和具备在上部的吸嘴集尘盖 60" 构成, 并在吸嘴底盖 60'形成有外部空气的吸入通路的吸入口。 一般 在吸嘴 60的两侧具备有可以使机身 70容易移动的移动轮 62。
对于吸嘴 60来说,机身 70在一定角度范围内可转动。 换言之, 机身 70是在吸嘴 60的后方在一定的倾斜范围内可以转动结合,为了 制约机身 70的转动, 吸嘴 60的后端部具备旋转控制板 64。
所以, 使用者一边用脚踩着旋转控制板 64的状态下, 一边用手 握持把手 72, 把机身 70向后方拉的时候, 机身 70会向后方倾斜。 这样, 可以让使用者依据自身的身高来调节机身 70的角度, 打扫地 面。
一方面, 机身 70的后面形成着电源线挂钩 71 , 电源线挂钩 71 是在机身 70的后面上下部分相互对称形成的, 这样的一双电源线挂 钩 71上缠绕着所保管的电源线 C。
机身 70的内部设置有产生吸引力的电机,并通过吸嘴 60吸入外 部的空气和异物。 吸嘴 60吸入的异物通过机身 70后面, 由具有柔软 的材质所制成的吸入软管, 流动到集尘盒 10,。
机身 70的前面形成有把集尘盒 10向机身 70外部取出时所使用 的拆卸按扭 76, 以及一部分凹入机身 70后方的集尘盒安置部 78。 也 就是说, 集尘盒安置部 78的内部装有集尘盒 10, 分离时按下拆卸按 扭 76,可使集尘盒 10从机身 70中分离出来。
集尘盒安置部 78的后面具备有空气流入通道的盒体排气室 80, 盒体排气室 80与集尘盒 10的排气孔 20连通,并具有集尘盒 10和电 机之间防止空气漏泄的作用。 因此, 盒体排气室 80是由具有一定有 弹力的材料所构成。
机身 70的前方底部具备有可供使用者选择性地将吸尘器前方照 亮的照明灯 L, 所以, 在打扫桌底或壁角等较暗的地方时可利用此吸 ¾3
照明灯 L的右侧具备有被集尘盒 10过滤的空气通过盒体排气室 80向机身 70外部导出的导出部 79。 导出部 79的内侧还具备有排气 过滤器(未图示), 也就是说, 排气过滤器重新过滤向外部 (室内空 间)排出的空气中的异物, 并向室内空间排出更舒适的空气。
机身 70的外面, 还附加有为了打扫偏僻壁角的另有用途的附件
A。
图 2是现有技术中真空吸尘器用集尘盒分解结构示意图。
如图所示,设置的集尘盒 10可以从集尘盒安置部 78内部分离到 外部, 并过滤从吸嘴 60吸入的空气中异物。
集尘盒 10—般是通过涡旋方式过滤异物, 或者通过设置过滤器 来过滤异物, 或者同时利用涡旋方式或过滤器方式将异物收集到内 部。
集尘盒 10是有以下部分构成: 下面密封而内部是空的圓桶型的 盒体 11 ; 盒体 11的上面形成密封其内部的集尘盖 12; 可拆卸的在集 尘盖 12的下部设有过滤向盒体 11内部流入异物的过滤组装器 17。
集尘盖 12的表面一侧由拆卸按扭 76选择性地控制, 使集尘盒 10不脱离机身 70所具备的装卸槽 12a。 装卸槽 12 a有一定深度的凹 陷, 可与集尘盖 12形成一体。
集尘盖 12的下侧具备有过滤组装器 17, 过滤流入集尘盒 10内 部的异物中细微尘土。过滤组装器 17可拆卸地设置在集尘盖 12的底 面, 过滤组装器 17的内部与导出管 18连通。 也就是说, 从过滤组装 器 17的外周面向内部流入的空气, 通过导出管 18向集尘盒 10外部 导出。
考虑到过滤组装器 17空气流动较强,为确保其具有一定的强度, 选择能保持原状的材质为佳。用可以很好地使物质选择性地通过的塑 料材质来制成, 例如, 用聚酯纤维材料制成。
盒体 11的一侧上端部形成吸入导向部 14。 吸入导向部 14在盒 体 11的外侧一端向所定部位导出,并引导盒体 11的内部流入的空气 沿着盒体 11的内壁向切线方向流动。 随之, 使吸入导向部 14在盒体 11的外面倾斜地形成。
吸入导向部 14的对侧外周壁形成有向外侧突出的把手 15。 设置 的把手 15是为了使用者从真空吸尘器的机身 70中将集尘盒 10拆卸 时更加容易。 在盒体 11 的内侧面流入的异物中, 为使质量相对较大的异物被 分离在下侧, 还具备有将盒体内部空间区分为上下部分的分离板 16。
分离板 16的外周面具备有可以使盒体 11的上部和下部连通的落 尘部 16a, 向盒体 11流入的异物中使较重的异物落下来。 也就是说, 质量较大的异物经落尘部 16a落下并堆积在盒体 11的下侧。
此外, 分离板 16的中央部形成过滤器连通孔 16b。 吸入导管 18 与过滤组装器 17的内部连通,经过滤组装器 17净化的空气向吸入导 管 18流入。
盒体 11的下部具备有与排气孔 20相连的导出管 18。 导出管 18 具有将过滤组装器 17净化的空气向盒体 11下方引导的作用。 同时, 导出管 18的末端, 即排气孔 20与盒体排气室 80面接触, 使空气不 被泄露。 实施例
以下参照实施例对本发明进行详细说明。这些实施例用于举例说 明本发明, 而非限制本发明。
实施例 1
取 95g水性 UV底油 WCP-MB (广州中山市中侨涂料粘胶有限 公司 ),以 1 :1的体积比例用乙醇稀译, 再加入 5g亲水性纳米二氧化 钛(杭州万景新材料有限公司, 型号 VK-T25H, 金红石晶型, 平均 原级粒径 25±5nm ), 采用 180瓦功率的超声波处理 3分钟,使混合物 均质化。 接着将所得的均匀溶液均匀涂覆到 ABS 基体上, 并用约 365nm波长的紫外光照射 1秒。 该涂料混合物在 ABS基体上形成均 匀涂层。
实施例 2
取约 10.7g钛酸正丁酯,将其与 97g水性 UV底油 WUV-3B混合, 再以 1:1的体积比例用乙醇稀释。在不断搅拌下, 加入 0.5g亲水性纳 米二氧化钛(杭州万景新材料有限公司, 型号 VK-T25H )作为结晶 诱导剂, 同时緩慢滴加约 27ml去离子水。 滴加完毕后, 再搅拌 3小 时, 得到二氧化钛溶胶。 整个过程在大约 65°C的水浴中进行。 陈化 12小时之后, 将所得溶液均匀涂覆到 ABS基体上, 并用约 365nm波 长的紫外光照射 1秒。 可以看到, 该涂料混合物在 ABS基体上形成 均匀涂层。
实施例 3
称取约 7.3g氟钛酸铵, 配制成约 0.1 mol/1的水溶液, 并将其与 0.21 mol/1硼酸水溶液按 1 : 1体积比混合, 再添加 97g水性 UV底油 WCP-MB。 在不断搅拌下, 加入 0.05g亲水性纳米二氧化钛(杭州万 景新材料有限公司, 型号 VK-TA18H, 锐钛矿型, 平均粒径约 18nm ) 作为结晶诱导剂, 继续搅拌 3小时, 得到混合液。 将所得混合液均匀 涂覆到 PC基体上, 静置 45小时后, 再用约 365nm波长的紫外光照 射 1秒。 可以看到, 该涂料混合物在 PC基体上形成均匀涂层。
实施例 4
取约 12.5g钛酸正丙酯,将其与 93g水性 UV底油 EF-1037混合, 再以 1 :1的体积比例用丙醇稀释, 再加入 3g抗静电剂 KJD-730。 在 不断搅拌下, 加入 0.5g 亲水性纳米二氧化钛(杭州万景新材料有限 公司, 型号 VK-TA18H )作为结晶诱导剂, 同时緩慢滴加约 25ml去 离子水。 滴加完毕后, 再搅拌 3小时, 得到二氧化钛溶胶。 整个过程 在大约 60°C的水浴中进行。 陈化 12小时之后, 将所得溶液均勾涂覆 到 PP基体上, 并用约 365nm波长的紫外光照射 1秒。 可以看到, 该 涂料混合物在 PP基体上形成均匀涂层。
实施例 5
取约 28.7g氟钛酸, 配制成约 0.1 mol/1的水溶液, 并将其与 0.21 mol/1硼酸水溶液按 1 : 1 体积比混合, 再添加 83g 水性 UV底油 WUV-3H和 2g抗静电剂 JZ。 在不断搅拌下, 加入 lg亲水性纳米二 氧化钛(杭州万景新材料有限公司, 型号 VK-TA18H )作为结晶诱导 剂, 继续搅拌 3小时, 得到混合液。 将所得混合液均匀涂覆到 PC基 体上, 静置 45小时后, 再用约 365nm波长的紫外光照射 1秒。 可以 看到, 该涂料混合物在 PC基体上形成均匀涂层。
实施例 6
在三件实施例 2中制得的带有二氧化钛涂层的 ABS基体上分别 铺满沙土、 铜粉和蜡烛油三种灰尘, 然后将灰尘倾倒掉。 作为对比, 对不含二氧化钛涂层的 ABS基体进行同样的处理。 两种基体在灰尘 倾倒前后的照片示于图 3A中, 可以看到本发明的二氧化钛涂层对三 类灰尘都有艮好不粘尘效果。铜粉的效果似乎不太显著, 这是由于铜 粉本身就不易粘附在 ABS表面上。
不拘囿于任何理论,认为本发明二氧化钛涂层的这种自清洁和不 粘尘的效果是在基体表面形成的这层致密二氧化钛层引起的。 从图 3B所示的 ABS基体和本发明二氧化钛涂层的 SEM照片中可以看到, 本发明二氧化钛涂层已经在基体表面上形成完全不同于原来基体表 面的结构。 实施例 7
将实施例 2中制备的涂层用作吸尘器集尘盒的盒体内壁涂层,并 与现有吸尘器的集尘盒进行比较。从图 4中可以观察到, 灰尘进入本 发明的集尘盒后, 自动落入灰尘底部, 内部艮少粘附; 倾倒后, 灰尘 基本全部倒出。 进一步收集粘附在集尘盒内部的灰尘, 称重。 结果发 现具有实施例 2 中制备的涂层的集尘盒内部所吸附的灰尘比在同样 条件下从具有一般抗静电材料的集尘盒上所收集的灰尘少很多。 而 且, 当与现有技术中带有一般抗静电材料的吸尘器集尘盒相比, 本发 明实施例 1-3中不含抗静电剂的涂层甚至都取得了更好的效果。 以上所述, 仅是本发明的较佳实施例而已, 并非对本发明作任何 形式上的限制。 上文所公开的数据或数据范围, 可以合理地组合。 而 且, 上文所公开的特征也可以合理地组合, 这种组合所构成的技术方 案显然仍在本发明的范围内。 另外, 任何熟悉本专业的技术人员, 在 不脱离本发明技术方案范围内,当然会利用揭示的技术内容作出些许 更动或修饰,
Figure imgf000013_0001
改、 等同变化与修饰, 均属于本发明技术方案的范围内。

Claims

权 利 要 求
1、 一种自清洁和不粘尘的涂料组合物, 其包含光固化成膜涂料 和光触媒。
2、 根据权利要求 1所述的涂料组合物, 其中所述光触媒包含二 氧化钛。
3、 根据权利要求 2所述的涂料组合物, 其中所述涂料组合物还 包含二氧化钛前体。
4、 根据权利要求 3所述的涂料组合物, 其中所述二氧化钛前体 选自钛酸烷基酯, 优选钛酸曱酯、 钛酸乙酯、 钛酸正丙酯、 钛酸异丙 酯、 钛酸正丁酯、 钛酸异丁酯或钛酸叔丁酯或其组合, 更优选钛酸正 丁酯; [¾化钛, 优选四氟化钛、 四氯化钛或二氯化钛; [¾代钛酸烷基 酯, 优选曱基三氯钛酸酯、 乙基三氯钛酸酯、 正丙基三氯钛酸酯、 异 丙基三氯钛酸酯或正丁基三氯钛酸酯; 氟钛酸或六氟钛酸铵。
5、 根据权利要求 1-4中任一项所述的涂料组合物, 其中所述光 固化成膜涂料包含光活性低聚体、 光活性单体和光引发剂, 所述光活 性低聚体优选选自不饱和聚酯树脂, 丙烯酸化的环氧树脂、 聚氨酯、 聚酯、 聚醚以及丙烯酸化聚丙烯酸酯中的一种或多种, 更优选选自环 氧基丙烯酸树脂、 双酚 A环氧丙烯酸酯、 丙烯酸酯 -双酚 A-环氧树脂 杂化低聚物、 聚氨酯丙烯酸酯中的一种或多种。
6. 根据权利要求 1-5中任一项所述的涂料组合物,其中所述光固 化成膜涂料是水性 UV底油, 优选塑料或树脂用水性 UV底油, 更优 选 WUV-3B、 WUV-3H、 WCP-MB或 EF-1037。
7、 根据权利要求 2-6中任一项所述的涂料组合物, 其中二氧化 钛的量基于涂料组合物的质量为约 0.5 %至约 25 % , 优选约 3 %至约 15 % , 更优选约 4 %至约 6 % , 最优选约 5 %。
8、 根据权利要求 1-7中任一项所述的涂料组合物, 其中所述涂 料组合物还包含有机抗静电剂,所述有机抗静电剂优选选自聚醚型如 PEG型, 包括聚酰胺或聚酯酰胺的聚氧乙烯醚体系, 曱氧基聚乙二醇 曱基丙烯酸酯共聚物;和离子型如季铵盐型和磺酸盐型中的一种或多 种, 更优选 KJD-1210、 KJD-730, HKD-321或 JZ。
9、 根据权利要求 1-8中任一项所述的涂料组合物用于形成自清 洁和不粘尘涂层的用途。
10、 一种吸尘器的集尘盒, 包括: 盒体, 其构成集尘盒的主要 组成部分, 用于收集并储存吸尘器吸入空气中的灰尘及异物, 其中在 集尘盒的盒体内壁上均匀涂布有由根据权利要求 1-8中任一项所述的 涂料组合物形成的涂层。
PCT/CN2010/075299 2009-07-20 2010-07-20 涂料组合物及其应用 WO2011009396A1 (zh)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000212484A (ja) * 1999-01-25 2000-08-02 Otsuka Chem Co Ltd コ―ティング剤組成物
CN1554717A (zh) * 2003-12-26 2004-12-15 �Ͼ���̩���ײ������޹�˾ 纳米技术改性的紫外光固化木器涂料
US20070190308A1 (en) * 2004-03-04 2007-08-16 Stefan Brand Coating for metal surfaces, method for the production thereof and use thereof as a self-cleaning protective layer, particularly for the rims of automobiles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000212484A (ja) * 1999-01-25 2000-08-02 Otsuka Chem Co Ltd コ―ティング剤組成物
CN1554717A (zh) * 2003-12-26 2004-12-15 �Ͼ���̩���ײ������޹�˾ 纳米技术改性的紫外光固化木器涂料
US20070190308A1 (en) * 2004-03-04 2007-08-16 Stefan Brand Coating for metal surfaces, method for the production thereof and use thereof as a self-cleaning protective layer, particularly for the rims of automobiles

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