CN111849311A - Optical protection material for LED indoor display screen and preparation method thereof - Google Patents

Optical protection material for LED indoor display screen and preparation method thereof Download PDF

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Publication number
CN111849311A
CN111849311A CN202010690845.3A CN202010690845A CN111849311A CN 111849311 A CN111849311 A CN 111849311A CN 202010690845 A CN202010690845 A CN 202010690845A CN 111849311 A CN111849311 A CN 111849311A
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parts
display screen
solvent
polyester resin
indoor display
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Granted
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CN202010690845.3A
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CN111849311B (en
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曾丽克
石学堂
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Yst Shenzhen New Material Co ltd
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Yst Shenzhen New Material Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • 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
    • 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
    • C09D167/06—Unsaturated polyesters having carbon-to-carbon unsaturation
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/20—Diluents or solvents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
    • C08L2203/206—Applications use in electrical or conductive gadgets use in coating or encapsulating of electronic parts

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paints Or Removers (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

The invention relates to the technical field of adhesives, in particular to an optical protection material for an LED indoor display screen and a preparation method thereof. The optical protective material for the LED indoor display screen at least comprises the following raw materials in parts by weight: 40-60 parts of polyester resin, 20-40 parts of alkane, 10-20 parts of solvent, 5-10 parts of matting powder, 1-3 parts of toner, 1-3 parts of coupling agent and 5-10 parts of other auxiliary agents. The protective material has good high and low temperature resistance, can form a layer of transparent protective film after being cured, can protect a circuit from being damaged under the conditions of vibration, moisture, salt mist, humidity and high temperature, and has excellent insulating, damp-proof, anti-creeping, dustproof, anti-corrosion, anti-aging, mildew-proof, anti-vibration, insulating corona-resistant and other properties.

Description

Optical protection material for LED indoor display screen and preparation method thereof
Technical Field
The invention relates to the technical field of adhesives, in particular to an optical protection material for an LED indoor display screen and a preparation method thereof.
Background
An LED display (LED display) is a flat panel display, which is composed of small LED module panels, and is used to display various information such as text, images, video, and the like. In recent years, the LED display screen has the advantages of high color gamut, high brightness, seamless splicing, etc., and thus meets the requirements of people for modern dance and beauty, and gradually occupies the mainstream position.
However, the service life of the exposed LED display screen circuit board is seriously affected by the existence of various environmental factors (acid-base salt spray, corrosive gas, impact force caused by thermal expansion and contraction, mechanical vibration, etc.). For example, long term exposure to high humidity or salt spray air can exacerbate the corrosive effects of metal components, while other deleterious effects of moisture and salt spray air can be the formation of films on the surfaces of non-metal components that degrade the dielectric and dielectric properties of these materials, creating leakage paths that degrade the overall performance of the LED display. Generally, the display screen reliability improvement method is to coat a protective material to achieve protection of the display screen.
At present, the process modes of the protective material used on the LED indoor display screen mainly comprise ink dispensing, organic silicon encapsulation and nano coating. However, the LED display screen coated by the ink dispensing has the problems that ink is easy to splash and shift, bubbles are generated, materials are scarce, dispensing black spots occur, color difference is inconsistent, light emission of lamp beads is influenced, and single lamp maintenance is difficult; after the organic silicon is encapsulated and coated with the protective material, the whole plate is very thick and heavy, the single lamp is difficult to maintain, and the organic silicon LED screen is only suitable for the problem of limitation of a large-distance LED screen; the nano coating material has poor high and low temperature resistance and poor vibration resistance, and the nano coating process is easy to yellow when working in a slightly high temperature environment, so that the uniformity of the screen luminescence of the display screen is influenced. The most important link of the LED display screen is light emission, the light emitting consistency of lamp beads is good, no color difference exists, the high-end level pursued by the LED display screen is achieved, and the problem of color difference basically exists after materials are coated in the protection process aiming at the LED display screen in the current market; in addition, the display screen can not be repaired by the processes of encapsulation, dispensing and the like at present, and huge waste is brought by high damage rate.
Aiming at the technical problems, the invention provides an optical protection material for an LED indoor display screen, which can be sprayed on a full screen at one time, has good consistency, high transmittance, no influence on the light emission of lamp beads, good high and low temperature resistance and can protect the display screen from being damaged under the conditions of vibration, moisture, salt mist, humidity and high temperature.
Disclosure of Invention
In order to solve the technical problems, the invention provides an optical protective material for an LED indoor display screen, which comprises the following raw materials in parts by weight: 40-60 parts of polyester resin, 20-40 parts of alkane, 10-20 parts of solvent, 5-10 parts of matting powder, 1-3 parts of toner, 1-3 parts of coupling agent and 5-10 parts of other auxiliary agents.
As a preferred technical solution of the present invention, the polyester resin is an organic silicon modified polyester resin.
As a preferable technical scheme of the invention, the dynamic viscosity of the organic silicon modified polyester resin at 25 ℃ is 1000-5000 mPas.
As a preferable technical scheme of the invention, the content of the organic silicon in the organic silicon modified polyester resin is 55-70 wt%.
In a preferred embodiment of the present invention, the number of carbon atoms in the alkane is 4 to 20.
As a preferred technical solution of the present invention, the solvent is an alcohol solvent and/or an ester solvent.
In a preferred embodiment of the present invention, the solvent is at least one selected from methanol, ethanol, propanol, butanol, methyl acetate, ethyl acetate, n-butyl acetate, ethyl valerate, ethyl propionate, ethyl nonanoate, ethyl formate, ethyl lactate, ethyl cinnamate, benzyl alcohol, and octanol.
As a preferable technical scheme of the invention, the solvent is a combination of ethyl acetate and n-butanol, and the volume ratio is (1-5): 1.
as a preferred embodiment of the present invention, the toner is black in color.
The second aspect of the invention provides a preparation method of the optical protection material for the LED indoor display screen, which comprises the following steps: mixing and stirring polyester resin, alkane, solvent and other auxiliary agents uniformly; then adding the coupling agent, the matting powder and the toner, continuing stirring for 10-30min, and filtering to obtain the product.
Advantageous effects
The invention provides an optical protection material for an LED indoor display screen, which can be sprayed on a full screen at one time, has good consistency and solves the problem of inconsistent chromatic aberration in the prior art; meanwhile, the silver color of the lamp pins and the bonding pads and the color difference of the LED screen can be covered, the contrast of the whole LED screen is improved, the transmittance of the material is not lower than 96%, and the light emission of the lamp beads is not influenced. The protective material provided by the invention has a matte effect, and solves the reflection phenomenon caused by the bright light of the display screen unit plate; in addition, the organic silicon modified polyester resin is adopted, so that the prepared protective material has good aging resistance, can be used for dismantling and maintaining lamp beads, and can be used for coating a film layer. The protective material has good high and low temperature resistance, can form a layer of transparent protective film after being cured, can protect a circuit from being damaged under the conditions of vibration, moisture, salt mist, humidity and high temperature, and has excellent insulating, damp-proof, anti-creeping, dustproof, anti-corrosion, anti-aging, mildew-proof, anti-vibration, insulating corona-resistant and other properties.
Detailed Description
The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
The term "prepared from …" as used herein is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.
The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.
Approximating language, as used herein throughout the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes portions that are literally received for modification without substantial change in the basic function to which the invention is related. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.
In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.
In order to solve the technical problems, the invention provides an optical protective material for an LED indoor display screen, which comprises the following raw materials in parts by weight: 40-60 parts of polyester resin, 20-40 parts of alkane, 10-20 parts of solvent, 5-10 parts of matting powder, 1-3 parts of toner, 1-3 parts of coupling agent and 5-10 parts of other auxiliary agents.
Polyester resin
The polyester resin is a general name of a high molecular compound obtained by polycondensation of dihydric alcohol or dibasic acid or polyhydric alcohol and polybasic acid, and is a short name of an unsaturated polyester adhesive. The unsaturated polyester adhesive is mainly composed of unsaturated polyester resin, an initiator, an accelerator, a filler, a thixotropic agent and the like. A linear polyester resin with-CH-double bond in its main chain can be mixed with vinyl monomer, such as styrene, acrylate and vinyl acetate, and then polymerized into insoluble or non-fusible product at ordinary temp under the action of trigger and promoter. The english abbreviation of unsaturated polyester is UP.
In the invention, the polyester resin is organic silicon modified polyester resin.
The organosilicon modified polyester resin has excellent electric insulation, good heat resistance, low curing temperature, good dipping and drying properties, uniform and compact paint film and good moisture resistance, and can be prepared by condensation reaction of silane or siloxane containing warp radical or alkoxy and low molecular weight polystyrene resin containing warp radical in the presence of lead acetate catalyst.
In a preferred embodiment, the dynamic viscosity of the silicone-modified polyester resin at 25 ℃ is 1000-.
In a more preferred embodiment, the dynamic viscosity of the silicone-modified polyester resin at 25 ℃ is 2000-4000mPa · s.
In a preferred embodiment, the silicone-modified polyester resin has a silicone content of 55 to 70 wt%.
In a more preferred embodiment, the silicone modified polyester resin has a silicone content of 65 ± 2 wt%.
In the present invention, the source of the silicone-modified polyester resin is not particularly limited, and may be mentioned "Yongxing chemical", model ETERKYD 50761-S-60 ".
Alkane(s)
Alkanes are open-chain saturated hydrocarbons (saturated hydrocarbons) in which carbon atoms in the molecule are all connected by single bonds and the remaining valences are all bonded to hydrogen. A general formula of C nH2n+2Is the simplest organic compound. The main sources of alkanes are petroleum and natural gas, which are important chemical raw materials and energy materials.
In the present invention, the number of carbon atoms in the alkane is 4 to 20.
In a preferred embodiment, the alkane is selected from at least one of pentane, hexane, heptane, octane, nonane, decane, undecane, dodecane, tridecane and tetradecane.
In a more preferred embodiment, the alkane is octane.
Solvent(s)
The solvent is a liquid (gas or solid) capable of dissolving a solid, liquid or gaseous solute (the solvent and solute can be solid, liquid or gas), and then becomes a solution. The most common solvent in daily life is water. The organic solvent is an organic compound containing carbon atoms. Solvents generally possess a relatively low boiling point and are readily volatile. Or can be removed by distillation, leaving a dissolved material. Thus, the solvent may not chemically react with the solute. They must be inert. The solvent may extract soluble compounds from the mixture, the most common example being brewing coffee or tea with hot water. Solvents are generally clear, colorless liquids, most of which have a distinctive odor.
In the invention, the solvent is an alcohol solvent and/or an ester solvent.
In a preferred embodiment, the solvent is selected from at least one of methanol, ethanol, propanol, butanol, methyl acetate, ethyl acetate, n-butyl acetate, ethyl valerate, ethyl propionate, ethyl nonanoate, ethyl formate, ethyl lactate, ethyl cinnamate, benzyl alcohol, and octanol.
In a more preferred embodiment, the solvent is a combination of ethyl acetate and n-butanol in a volume ratio of (1-5): 1.
in a most preferred embodiment, the solvent is a combination of ethyl acetate and n-butanol in a volume ratio of 3: 1.
matting powder
The flatting powder can be divided into oil flatting powder and water flatting powder, and is widely applied to various coating systems such as emulsion paint, interior and exterior wall coating, alkyd resin paint, polyester paint and the like. When the paint is applied to coatings and paints, the surface gloss of the coating can be controlled in a balanced manner, the wear resistance and scratch resistance of the coating are improved, and the coating has the functions of dehumidifying, deodorizing, purifying air, insulating sound, preventing water, insulating heat and realizing permeability.
In the present invention, the matting agent is not particularly limited, and silica-based matting agents, organic matting agents and the like can be mentioned.
In a preferred embodiment, the matting powder is an organic matting powder.
In the present invention, the source of the matting powder is not particularly limited, and there may be mentioned Guangzhou Jiujin International trade Co., Ltd., model No. M2, M3, M4, M5, M6 and the like.
Toner powder
In the present invention, the color of the toner is black.
In a preferred embodiment, the toner is a ferrous metal complex powder.
In the present invention, the source of the toner is not particularly limited, and Shanghai silver match industries, Inc., model number BLACK-29, may be mentioned.
Coupling agent
The coupling agent is a substance with two functional groups with different properties, and the molecular structure of the coupling agent is mainly characterized in that the molecule contains two groups with different chemical properties, one group is an inorganophilic group and is easy to chemically react with the surface of an inorganic substance; the other is an organophilic group which is capable of chemically reacting with or forming hydrogen bonds soluble in synthetic resins or other polymers. Therefore, the coupling agent is called as a molecular bridge and is used for improving the interface action between inorganic matters and organic matters, so that the properties of the composite material, such as physical properties, electrical properties, thermal properties, optical properties and the like, are greatly improved. The coupling agent is used in rubber industry, can improve the wear resistance and aging resistance of products such as tires, rubber plates, rubber tubes, rubber shoes and the like, and can reduce the dosage of NR, thereby reducing the cost. The coupling agent in the composite material can react with certain groups on the surface of the reinforcing material and also react with matrix resin to form an interface layer between the reinforcing material and the resin matrix, and the interface layer can transfer stress, so that the bonding strength between the reinforcing material and the resin is enhanced, the performance of the composite material is improved, other media can be prevented from permeating into the interface, the interface state is improved, and the aging resistance, the stress resistance and the electrical insulation performance of a product are facilitated.
In the present invention, the coupling agent is not particularly limited, and a silane coupling agent and the like can be mentioned.
The molecular structural formula of the silane coupling agent is generally Y-R-Si (OR)3(wherein Y-organic functional group, SiOR-siloxy). The siloxy group is reactive with inorganic species and the organofunctional group is reactive or compatible with organic species. Thus, when a silane coupling agent intervenes between the inorganic and organic interfaces, a bonding layer of organic matrix-silane coupling agent-inorganic matrix may be formed.
In a preferred embodiment, as the silane coupling agent, there may be mentioned KH550, KH560, KH570, KH602, KH792, KH171 and the like.
Other auxiliaries
In the invention, the other auxiliary agents at least comprise a wetting agent, a leveling agent, a defoaming agent and a rheological auxiliary agent.
Wetting agent
A humectant is a substance that makes solid materials more susceptible to wetting by water. The solid material is wetted by reducing its surface tension or interfacial tension, allowing water to spread on or penetrate the surface of the solid material.
In the present invention, the wetting agent is not particularly limited, and anionic surfactants, nonionic surfactants, cationic surfactants and the like can be mentioned.
In a preferred embodiment, the wetting agent is a non-ionic surfactant and/or an anionic surfactant.
Leveling agent
The leveling agent is a common paint auxiliary agent and can promote the paint to form a flat, smooth and uniform coating film in the drying film-forming process. Can effectively reduce the surface tension of the finishing liquid and improve the leveling property and uniformity of the finishing liquid. Can improve the permeability of the coating liquid, reduce the possibility of generating spots and stains during the brush coating, increase the coverage and ensure that the formed film is uniform and natural. Mainly surfactant, organic solvent, etc. Many types of leveling agents are used, and the types of leveling agents used in different coatings are different. High boiling point solvents or butyl cellulose may be used in the solvent based finish. In the water-based coating agent, a surfactant, polyacrylic acid, carboxymethyl cellulose, or the like is used.
In the present invention, the leveling agent is not particularly limited.
In a preferred embodiment, as the leveling agent, polyether-modified polysiloxane, polyacrylate, and the like can be mentioned.
Defoaming agent
Defoamers are substances that reduce the surface tension of water, solutions, suspensions, etc., prevent the formation of foam, or reduce or eliminate the original foam. The application of the defoaming agent is very wide, such as the food industry, the paper industry, the water treatment industry, the oil extraction industry, the printing and dyeing industry, the coating industry, the detergent industry, the rubber latex industry, the aerosol industry, the daily chemical industry, the medical industry, the dairy industry and the like.
In the present invention, the defoaming agent is not particularly limited, and non-silicon type defoaming agents, polyether type defoaming agents, silicone type defoaming agents, polyether modified silicone type defoaming agents, and the like can be mentioned.
In the present invention, the source of the defoaming agent is not particularly limited, and German bike, BYK-065, BYK-016, BYK-093, BYK-094, BYK-1790, BYK-024, BYK-141, BYK-066N, BYK-085, BYK-1752, BYK-501, BYK-A555 and the like can be mentioned.
Rheology aid
In solvent-based formulations, the flow characteristics can be fully controlled by the molecular weight of the binder. In aqueous formulations, the binder is present in the form of dispersed polymer particles, so that it is not possible to modify the flow behavior by adjusting the binder molecular weight. Rheology auxiliaries (thickeners) must therefore be used to adjust the flow characteristics of aqueous coatings and inks.
In the present invention, the rheology assistant is not particularly limited.
In a preferred embodiment, the rheological aid may be polyethylene wax, organic bentonite, polyamide wax, or the like.
The second aspect of the invention provides a preparation method of the optical protection material for the LED indoor display screen, which comprises the following steps: mixing and stirring polyester resin, alkane, solvent and other auxiliary agents uniformly; then adding the coupling agent, the matting powder and the toner, continuing stirring for 10-30min, and filtering to obtain the product.
The inventor finds that through reasonable compounding of the raw materials of the components, particularly through the adoption of the organic silicon modified polyester resin, the proper solvent and the toner, the prepared protective material has excellent weather resistance, yellowing resistance, high and low temperature resistance, good adhesion to an LED display screen, easy removal and repair, and avoids the problem of chromatic aberration after being coated on the LED display screen. The inventor considers that the possible reason is that the invention adopts the compounding of the ethyl acetate and the n-butyl alcohol, and can efficiently dissolve the organic silicon modified polyester system, particularly when the volume ratio of the ethyl acetate to the n-butyl alcohol is 3: 1, the solubility of the system in a solvent reaches the best, and the compatibility and the synergistic effect among all the components are effectively improved; because the hydroxyl and ether bond exist in the system, the protective material and the substrate are mutually attracted, so that the adhesive force of the protective material to the substrate is effectively improved. In addition, a large number of stable-O-Si-O-silicon oxygen bonds in the organic silicon modified polyester resin are not easy to break, free radical reaction caused by ultraviolet rays is difficult to generate, the weather resistance is good, meanwhile, the Si-O bonds are mainly used, the d-p pi bonds formed by Si and O atoms are stable to heat and oxidation environments, the shielding effect is realized on alkyl connected with the Si atoms, chemical bonds of molecules are not broken or decomposed at high temperature or under radiation irradiation, and the thermal stability is high; secondly, the acting force among the molecular chains of the silicone resin is small, the strong solvent resistance is poor, the polyester resin is copolymerized and modified by the silicone resin, particularly, the content of the silicone is controlled to be 55-70 wt%, and the structural main body contains silicon, so that the paint film can be cleaned, re-sprayed and repaired by the strong solvent. In addition, because color difference exists among different modules of the produced LED display screen, the consistency of the display quality of the LED screen is influenced, the added toner is ferrous metal complex powder, the color difference problem is solved by carrying out consistent spraying on different modules, and the color difference value among different modules is less than 0.2.
The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
In addition, the starting materials used are all commercially available, unless otherwise specified.
Examples
Example 1
The embodiment 1 provides an optical protective material for an LED indoor display screen, which comprises the following raw materials in parts by weight: 40 parts of polyester resin, 30 parts of alkane, 20 parts of solvent, 4 parts of extinction powder, 1 part of toner, 1 part of coupling agent and 5 parts of other auxiliary agents.
The polyester resin is organic silicon modified polyester resin selected from Changxing chemical model ETERKYD 50761-S-60; the alkane is octane; the solvent is a combination of ethyl acetate and n-butanol, and the volume ratio is 3: 1; the matting powder is organic matting powder and is selected from Guangzhou Xianhui International trade company Limited, model M2; the toner is BLACK metal complex powder selected from Shanghai silver match industry Co., Ltd, type BLACK-29; the silane coupling agent is KH 550; the other auxiliary agents are wetting agents, flatting agents, defoaming agents and rheological auxiliary agents, and the weight ratio is 1: 1: 1: 1; the humectant is purchased from biological technologies, Inc. of Jinanhaoder, model x-405; the leveling agent is selected from Gekko Swinhonis, a TEGO GLIDE B1484; the defoaming agent is selected from German Bike, BYK-065; the rheological additive is polyethylene wax.
The preparation method of the optical protection material for the LED indoor display screen comprises the following steps: mixing and stirring polyester resin, alkane, solvent and other auxiliary agents uniformly; then adding the coupling agent, the matting powder and the toner, continuing stirring for 20min, and filtering to obtain the product.
Example 2
The embodiment 2 provides an optical protective material for an LED indoor display screen, which comprises the following raw materials in parts by weight: 50 parts of polyester resin, 30 parts of alkane, 10 parts of solvent, 4 parts of extinction powder, 1 part of toner, 2 parts of coupling agent and 5 parts of other auxiliary agents.
The polyester resin is organic silicon modified polyester resin selected from Changxing chemical model ETERKYD 50761-S-60; the alkane is octane; the solvent is a combination of ethyl acetate and n-butanol, and the volume ratio is 3: 1; the matting powder is organic matting powder and is selected from Guangzhou Xianhui International trade company Limited, model M2; the toner is BLACK metal complex powder selected from Shanghai silver match industry Co., Ltd, type BLACK-29; the silane coupling agent is KH 550; the other auxiliary agents are wetting agents, flatting agents, defoaming agents and rheological auxiliary agents, and the weight ratio is 1: 1: 1: 1; the humectant is purchased from biological technologies, Inc. of Jinanhaoder, model x-405; the leveling agent is selected from Gekko Swinhonis, a TEGO GLIDE B1484; the defoaming agent is selected from German Bike, BYK-065; the rheological additive is polyethylene wax.
The preparation method of the optical protection material for the LED indoor display screen comprises the following steps: mixing and stirring polyester resin, alkane, solvent and other auxiliary agents uniformly; then adding the coupling agent, the matting powder and the toner, continuing stirring for 20min, and filtering to obtain the product.
Example 3
Embodiment 3 provides an optical protective material for an LED indoor display screen, which comprises the following raw materials in parts by weight: 50 parts of polyester resin, 20 parts of alkane, 20 parts of solvent, 4 parts of extinction powder, 1 part of toner, 3 parts of coupling agent and 5 parts of other auxiliary agents.
The polyester resin is organic silicon modified polyester resin selected from Changxing chemical model ETERKYD 50761-S-60; the alkane is octane; the solvent is a combination of ethyl acetate and n-butanol, and the volume ratio is 3: 1; the matting powder is organic matting powder and is selected from Guangzhou Xianhui International trade company Limited, model M2; the toner is BLACK metal complex powder selected from Shanghai silver match industry Co., Ltd, type BLACK-29; the silane coupling agent is KH 550; the other auxiliary agents are wetting agents, flatting agents, defoaming agents and rheological auxiliary agents, and the weight ratio is 1: 1: 1: 1; the humectant is purchased from biological technologies, Inc. of Jinanhaoder, model x-405; the leveling agent is selected from Gekko Swinhonis, a TEGO GLIDE B1484; the defoaming agent is selected from German Bike, BYK-065; the rheological additive is polyethylene wax.
The preparation method of the optical protection material for the LED indoor display screen comprises the following steps: mixing and stirring polyester resin, alkane, solvent and other auxiliary agents uniformly; then adding the coupling agent, the matting powder and the toner, continuing stirring for 20min, and filtering to obtain the product.
Example 4
Embodiment 4 provides an optical protective material for an LED indoor display screen, which comprises the following raw materials in parts by weight: 55 parts of polyester resin, 24 parts of alkane, 10 parts of solvent, 5 parts of extinction powder, 1 part of toner, 1 part of coupling agent and 5 parts of other auxiliary agents.
The polyester resin is organic silicon modified polyester resin selected from Changxing chemical model ETERKYD 50761-S-60; the alkane is octane; the solvent is a combination of ethyl acetate and n-butanol, and the volume ratio is 3: 1; the matting powder is organic matting powder and is selected from Guangzhou Xianhui International trade company Limited, model M2; the toner is BLACK metal complex powder selected from Shanghai silver match industry Co., Ltd, type BLACK-29; the silane coupling agent is KH 550; the other auxiliary agents are wetting agents, flatting agents, defoaming agents and rheological auxiliary agents, and the weight ratio is 1: 1: 1: 1; the humectant is purchased from biological technologies, Inc. of Jinanhaoder, model x-405; the leveling agent is selected from Gekko Swinhonis, a TEGO GLIDE B1484; the defoaming agent is selected from German Bike, BYK-065; the rheological additive is polyethylene wax.
The preparation method of the optical protection material for the LED indoor display screen comprises the following steps: mixing and stirring polyester resin, alkane, solvent and other auxiliary agents uniformly; then adding the coupling agent, the matting powder and the toner, continuing stirring for 20min, and filtering to obtain the product.
Example 5
Embodiment 5 provides an optical protective material for an LED indoor display screen, which comprises the following raw materials in parts by weight: 58 parts of polyester resin, 21 parts of alkane, 10 parts of solvent, 5 parts of extinction powder, 5 parts of toner, 1 part of coupling agent and 10 parts of other auxiliary agents.
The polyester resin is organic silicon modified polyester resin selected from Changxing chemical model ETERKYD 50761-S-60; the alkane is octane; the solvent is a combination of ethyl acetate and n-butanol, and the volume ratio is 3: 1; the matting powder is organic matting powder and is selected from Guangzhou Xianhui International trade company Limited, model M2; the toner is BLACK metal complex powder selected from Shanghai silver match industry Co., Ltd, type BLACK-29; the silane coupling agent is KH 550; the other auxiliary agents are wetting agents, flatting agents, defoaming agents and rheological auxiliary agents, and the weight ratio is 1: 1: 1: 1; the humectant is purchased from biological technologies, Inc. of Jinanhaoder, model x-405; the leveling agent is selected from Gekko Swinhonis, a TEGO GLIDE B1484; the defoaming agent is selected from German Bike, BYK-065; the rheological additive is polyethylene wax.
The preparation method of the optical protection material for the LED indoor display screen comprises the following steps: mixing and stirring polyester resin, alkane, solvent and other auxiliary agents uniformly; then adding the coupling agent, the matting powder and the toner, continuing stirring for 20min, and filtering to obtain the product.
Example 6
Example 6 differs from example 1 in that the polyester resin is an unsaturated polyester resin, purchased from gallery Ronwei anticorrosive materials, Inc., under the designation 901.
Example 7
Example 7 differs from example 1 in that the polyester resin is a silicone modified polyester resin, available from union, inc, of chan city under the designation 1053B.
Example 8
Example 8 differs from example 1 in that the solvent is ethyl acetate.
Example 9
Example 9 differs from example 1 in that the solvent is n-butanol.
Example 10
Example 10 differs from example 1 in that the solvent is a combination of ethyl propionate and octanol in a volume ratio of 3: 1.
performance testing
Figure BDA0002589296700000121
The test results are shown in Table 1.
TABLE 1 results of the Performance test of examples 1 to 10
Figure BDA0002589296700000122
Figure BDA0002589296700000131
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.

Claims (10)

1. The optical protection material for the LED indoor display screen is characterized by at least comprising the following raw materials in parts by weight: 40-60 parts of polyester resin, 20-40 parts of alkane, 10-20 parts of solvent, 5-10 parts of matting powder, 1-3 parts of toner, 1-3 parts of coupling agent and 5-10 parts of other auxiliary agents.
2. The optical protective material for the LED indoor display screen according to claim 1, wherein the polyester resin is an organic silicon modified polyester resin.
3. The optical protective material for the LED indoor display screen is characterized in that the dynamic viscosity of the organic silicon modified polyester resin at 25 ℃ is 1000-5000 mPa-s.
4. The optical protective material for the LED indoor display screen is characterized in that the content of the organic silicon in the organic silicon modified polyester resin is 55-70 wt%.
5. The optical protective material for the LED indoor display screen is characterized in that the number of carbon atoms in the alkane is 4-20.
6. The optical protective material for the LED indoor display screen is characterized in that the solvent is an alcohol solvent and/or an ester solvent.
7. The optical protective material for the LED indoor display screen according to claim 6, wherein the solvent is at least one selected from methanol, ethanol, propanol, butanol, methyl acetate, ethyl acetate, n-butyl acetate, ethyl valerate, ethyl propionate, ethyl nonanoate, ethyl formate, ethyl lactate, ethyl cinnamate, benzyl alcohol and octanol.
8. The optical protective material for the LED indoor display screen is characterized in that the solvent is a combination of ethyl acetate and n-butanol, and the volume ratio is (1-5): 1.
9. the LED indoor display screen optical protective material is characterized in that the color of the toner is black.
10. The preparation method of the optical protective material for the LED indoor display screen according to any one of claims 1 to 9, characterized by comprising the following steps: mixing and stirring polyester resin, alkane, solvent and other auxiliary agents uniformly; then adding the coupling agent, the matting powder and the toner, continuing stirring for 10-30min, and filtering to obtain the product.
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Publication number Priority date Publication date Assignee Title
CN112280086A (en) * 2020-11-12 2021-01-29 苏州瑞高新材料有限公司 Novel light-transmitting superconducting automobile interior material and preparation method thereof

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CN102604585A (en) * 2012-03-12 2012-07-25 深圳市兴时达科技产品有限公司 Electronic protecting glue, and preparation method and application thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102604585A (en) * 2012-03-12 2012-07-25 深圳市兴时达科技产品有限公司 Electronic protecting glue, and preparation method and application thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112280086A (en) * 2020-11-12 2021-01-29 苏州瑞高新材料有限公司 Novel light-transmitting superconducting automobile interior material and preparation method thereof
CN112280086B (en) * 2020-11-12 2023-03-14 苏州瑞高新材料有限公司 Novel transparent superconducting automotive interior material and preparation method thereof

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