CN113025222A - Adsorption pad for fine polishing of electronic display screen and production method thereof - Google Patents
Adsorption pad for fine polishing of electronic display screen and production method thereof Download PDFInfo
- Publication number
- CN113025222A CN113025222A CN202110259843.3A CN202110259843A CN113025222A CN 113025222 A CN113025222 A CN 113025222A CN 202110259843 A CN202110259843 A CN 202110259843A CN 113025222 A CN113025222 A CN 113025222A
- Authority
- CN
- China
- Prior art keywords
- stirring
- composite board
- electronic display
- adsorption pad
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/141—Hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2461/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
- C08J2461/34—Condensation polymers of aldehydes or ketones with monomers covered by at least two of the groups C08J2461/04, C08J2461/18, and C08J2461/20
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/527—Cyclic esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/20—Presence of organic materials
- C09J2400/24—Presence of a foam
- C09J2400/243—Presence of a foam in the substrate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2475/00—Presence of polyurethane
- C09J2475/006—Presence of polyurethane in the substrate
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Silicon Polymers (AREA)
Abstract
The invention discloses an adsorption pad for fine polishing of an electronic display screen, which is sequentially provided with release paper, double faced adhesive tape, a PET (polyethylene terephthalate) film, double faced adhesive tape, a polyurethane porous material and a polyurethane protective film from top to bottom; the invention also discloses a preparation method of the adsorption pad for fine polishing of the electronic display screen, which comprises the following steps: firstly, sticking a PET film above a polyurethane porous material through double-sided adhesive, and sticking release paper above the PET film through the double-sided adhesive to obtain a composite board; and secondly, placing the composite board in a roller type hot press, hot-pressing the lower part of the composite board at the hot-pressing pressure of 0.3-0.5MPa, placing the hot-pressed composite board in a heating device, heating for 10-15s at the heating temperature of 100-115 ℃, heating the polyurethane protective film at the same temperature, hot-pressing the polyurethane protective film to the lower part of the composite board to obtain a semi-finished product, and processing, cutting and packaging the semi-finished product.
Description
Technical Field
The invention belongs to the technical field of adsorption pad preparation, and particularly relates to an adsorption pad for fine polishing of an electronic display screen and a production method thereof.
Background
The electronic display screen is a screen body formed by a plurality of display units (unit display panels or unit display box bodies) which can be combined and spliced, and a set of proper controller (mainboard or control system) is added, in the production process of the existing electronic display screen, the display screen needs to be finely polished, the fine polishing is carried out to polish and arrange the tiny pits and cracks on the display screen, however, when the single surface of the actual product is polished, the product to be polished is usually absorbed by a polyurethane absorption pad in vacuum, the polyurethane foaming technology is adopted, so that a polyurethane skin layer forms a bag-shaped ventilation structure, air in the capsule at the absorption pad area of the adhered panel glass is removed under the action of certain pressure in the polishing process, so that the vacuum absorption and polishing glass is formed, but in the prior art, the polyurethane absorption pad has poor absorption performance and poor waterproof performance, and the friction and heating in the grinding process can cause damage to the absorption pad, polyurethane is used as a polymer material with excellent physical and mechanical properties, has good flexibility, cold resistance and water resistance, is a polymer material with the most extensive application, and is widely used in the polishing treatment process of glass for electronic screens in recent years.
Disclosure of Invention
The invention aims to provide an adsorption pad for fine polishing of an electronic display screen and a production method thereof.
The technical problems to be solved by the invention are as follows:
in the prior art, the polyurethane adsorption pad has poor heat resistance and poor waterproofness, and the service life of the adsorption pad is seriously influenced.
The purpose of the invention can be realized by the following technical scheme:
an adsorption pad for fine polishing of an electronic display screen is sequentially provided with release paper, double-sided adhesive tape, a PET (polyethylene terephthalate) film, double-sided adhesive tape, a polyurethane porous material and a polyurethane protective film from top to bottom;
the adsorption pad for fine polishing of the electronic display screen is prepared by the following steps:
firstly, sticking a PET film above a polyurethane porous material through double-sided adhesive, and sticking release paper above the PET film through the double-sided adhesive to obtain a composite board;
and secondly, placing the composite board in a roller type hot press, carrying out hot pressing on the lower part of the composite board, wherein the hot pressing pressure is 0.3-0.5MPa, placing the hot-pressed composite board in a heating device, heating for 10-15s at the heating temperature of 100-115 ℃, heating the polyurethane protective film at the same temperature, carrying out hot pressing on the polyurethane protective film to the lower part of the composite board to obtain a semi-finished product, and processing, cutting and packaging the semi-finished product to obtain the adsorption pad for fine polishing of the electronic display screen.
Further, the preparation process of the polyurethane porous material is as follows:
step S11, preparing the following raw materials in parts by weight: 80-100 parts of polyether polyol, 0.4-0.6 part of foam stabilizer, 2.5 parts of triethanolamine, 1 part of catalyst, 2.5 parts of deionized water, 30-35 parts of diphenylmethane diisocyanate, 1 part of foaming agent, 5-10 parts of modified aerogel and 1-3 parts of auxiliary agent;
step S12, adding polyether polyol, a foam stabilizer, triethanolamine, a catalyst, deionized water, a foaming agent, modified aerogel and an auxiliary agent into a reaction kettle, stirring for 1h at the rotation speed of 800-;
and S13, adding diphenylmethane diisocyanate into the first component, stirring for 2-4h at the rotation speed of 500-750r/min to obtain a second component, pouring the second component into a mold for foaming, then placing the second component into a heat preservation box for curing for 2h at 50 ℃, cooling to room temperature, and taking out to obtain the polyurethane porous material.
Further, the modified aerogel is made by the steps of:
step A1, adding benzoxazine and N, N-dimethylformamide into a three-neck flask, stirring at a rotating speed of 80r/min until the benzoxazine and the N, N-dimethylformamide are completely dissolved, then adding a hydrochloric acid solution with a concentration of 2mol/L, continuously stirring for 10min, adding tetraethoxysilane into the three-neck flask, increasing the rotating speed to 100-200r/min, stirring for 20min, transferring to a polypropylene tank, sealing for 7h, aging for 48h, washing for 3 times with absolute ethyl alcohol, washing for 3 times with N-hexane, and finally drying at normal temperature and normal pressure to constant weight to obtain doped aerogel;
and A2, adding the doped aerogel and the absolute ethyl alcohol obtained in the step A1 into a reaction kettle, stirring for 10-20min at the rotation speed of 100r/min, adding concentrated sulfuric acid and oxalic acid into the reaction kettle, heating to 50 ℃, stirring for 30min at a constant rotation speed, adding hexafluorobutanol into the reaction kettle, keeping the temperature constant, increasing the rotation speed to 200 and 300r/min, stirring for 50min, cooling to room temperature, filtering, washing a filter cake with deionized water until the washing liquid is neutral, and finally drying for 24h in a 30 ℃ oven to obtain the modified aerogel.
Further, the using amount ratio of the benzoxazine, the N, N-dimethylformamide, the hydrochloric acid solution and the ethyl orthosilicate in the step A1 is 15 mmol: 60mL of: 2mL of: 12 mL; the dosage ratio of aerogel, absolute ethyl alcohol, concentrated sulfuric acid, oxalic acid and hexafluorobutanol doped in the step A2 is 1 g: 60-80 mL: 0.2 mL: 0.5 g: 1mL, and the mass fraction of concentrated sulfuric acid is 95%.
Benzoxazine monomer is subjected to ring opening polymerization under the catalysis of hydrochloric acid to obtain polybenzoxazine with a cross-linked network structure, tetraethoxysilane is subjected to hydrolytic polymerization under an acidic condition to form a Si-O-Si network structure, and the Si-O-Si network structure and tetraethoxysilane form doped aerogel with a mutually-interpenetrated network structure in a DMF solvent system, wherein the benzoxazine monomer contains N and phenol rings and has good flame retardance, and the network structure introduced with Si-O-Si can form SiO during combustion2Protective film to further reduce heat of aerogelConductivity is improved, flame retardant performance of the material is improved, then the doped aerogel is dispersed in absolute ethyl alcohol, under the catalytic action of concentrated sulfuric acid, hydroxyl on the surface of the aerogel and ethylene glycol are subjected to esterification reaction, and further the aerogel and hexafluorobutanol are subjected to esterification reaction to obtain the modified aerogel, due to the existence of the fluoroalkyl chain, hydrophobicity of the aerogel is improved, and the modified aerogel is added into an adsorption pad material, so that heat transfer can be effectively inhibited, and flame retardant performance of the material is improved.
Further, the auxiliary agent is prepared by the following steps:
step S21, adding toluene, tetradecyltrimethyl ammonium chloride and phosphorus trichloride into a four-neck flask, stirring for 10min at the rotating speed of 60-100r/min, and mixing an anti-aging agent 2246 and toluene according to the weight ratio of 1 g: 3 to 5mL of the mixture is uniformly mixed to obtain a solvent a, the solvent a is dripped into a four-neck flask by a constant pressure dropping funnel under the condition of room temperature, the dripping speed is controlled to be 1 to 3 drops/second, a tail gas bottle filled with sodium hydroxide solution is used for absorbing HCl gas, then heating to 50-70 ℃, stirring and reacting for 3-5h under the condition of the rotating speed of 100-, adding pentaerythritol into a four-neck flask, heating to 90-115 ℃, keeping the rotating speed unchanged, continuing to react for 5-7 hours, after the reaction is finished, adding triethylamine to adjust the pH value to 7-8, distilling at 110-115 ℃ under normal pressure to remove toluene, then adding isopropanol, soaking and washing for 3-5 times, cooling to 0-5 ℃, crystallizing, filtering, and drying a filter cake in a 50 ℃ oven to constant weight to obtain an intermediate 1;
the reaction process is as follows:
step S22, adding dodecyl dimethyl benzyl ammonium bromide, urea and deionized water into a beaker, performing ultrasonic dispersion for 10min at the frequency of 20-40kHz, then adding cyclohexane and isopropanol into the beaker, dropwise adding tetraethoxysilane into the beaker while stirring at the rotating speed of 900r/min at the room temperature, finishing dropwise adding within 20min, stirring and reacting for 16h under the condition of oil bath at 70 ℃, cooling to the room temperature after the reaction is finished, centrifuging for 20min at the rotating speed of 5000 plus 8000r/min, washing the precipitate for 3 times with acetone and deionized water respectively, drying for 12h at the temperature of 60 ℃, grinding, and calcining for 3h at the temperature of 500 ℃ in a muffle furnace to obtain an intermediate 2;
step S23, adding the intermediate 1 and N, N-dimethylformamide into a beaker, stirring for 10min by using a glass rod, adding the intermediate 2 into the beaker, carrying out ultrasonic treatment for 15min at the frequency of 20-40kHz, adding heptadecafluorodecyltrimethoxysilane, carrying out stirring reaction for 2-4h under the condition of the rotation speed of 200-40 r/min, filtering, washing a filter cake for 3-5 times by using an ethanol solution with the mass fraction of 30%, and finally drying for 5-10h in an oven at the temperature of 70 ℃ to obtain the auxiliary agent.
Further, the dosage ratio of the toluene, the phosphorus trichloride, the anti-aging agent 2246 and the pentaerythritol in the step S21 is 150-200 mL: 0.22 mol: 0.2 mol: 0.1 mol; wherein the dosage of the tetradecyl trimethyl ammonium chloride is 1-2% of the mass of the anti-aging agent 2246; in step S22, the ratio of the amounts of dodecyldimethylbenzyl ammonium bromide, urea, deionized water, cyclohexane, isopropyl alcohol and ethyl orthosilicate is 3 g: 1.8 g: 90mL of: 90mL of: 2-3 mL: 9 mL; in step S23, the ratio of the amounts of intermediate 1, N-dimethylformamide, intermediate 2 and heptadecafluorodecyltrimethoxysilane was 1 g: 50-70 mL: 3 g: 0.1 g.
Taking an anti-aging agent 2246 and phosphorus trichloride as revealing raw materials, under the catalytic action of medium-tetradecyl trimethyl ammonium chloride, enabling hydrogen atoms on phenolic hydroxyl groups of the anti-aging agent 2246 and chlorine atoms on the phosphorus trichloride to perform substitution reaction, then enabling the other two chlorine atoms of the phosphorus trichloride and alcoholic hydroxyl groups of pentaerythritol to perform substitution reaction to obtain a composite antioxidant intermediate 1 which is highly symmetrical and contains phosphite ester combination and hindered phenol combination, enabling the intermediate 1 to have better stability due to the symmetrical structure, enabling phosphite ester and hindered phenol structures to cooperatively play an antioxidation role, preparing mesoporous silicon dioxide, namely an intermediate 2 through a template calcination method, dispersing the intermediate 2 in an N, N-dimethylformamide solvent, adding the intermediate 1, enabling the intermediate 1 to enter the intermediate 2 through a gap structure of the intermediate 2 under the ultrasonic action, and finally modifying by utilizing heptadecafluorodecyl trimethoxy silane, the auxiliary agent is obtained, the surface of the auxiliary agent contains longer C-F alkyl long chains and has a super-hydrophobic characteristic, mesoporous silicon dioxide serving as an inorganic material can play a toughening and filling role, the intermediate 1 has a stronger antioxidation effect and can prevent the phenomena of aging, yellowing and physical property reduction of the material under the external factors of light, heat and the like, and in the invention, the antioxidant can prevent the chain scission reaction and decomposition reaction of a polymer caused by thermal oxidation.
Further, the polyether polyol is polyether polyol GP-3630, the foam stabilizer is non-hydrolytic high-efficiency soft foam silicone oil DC-580, and the catalyst is catalyst A1 and catalyst A33 according to a mass ratio of 0.05: 1, and the foaming agent is one or two of butane, isobutane, 2, 3-dimethylbutane and isopentane which are mixed according to any proportion.
Further, the preparation method of the adsorption pad for fine polishing of the electronic display screen comprises the following steps:
firstly, sticking a PET film above a polyurethane porous material through double-sided adhesive, and sticking release paper above the PET film through the double-sided adhesive to obtain a composite board;
and secondly, placing the composite board in a roller type hot press, carrying out hot pressing on the lower part of the composite board, wherein the hot pressing pressure is 0.3-0.5MPa, placing the hot-pressed composite board in a heating device, heating for 10-15s at the heating temperature of 100-115 ℃, heating the polyurethane protective film at the same temperature, carrying out hot pressing on the polyurethane protective film to the lower part of the composite board to obtain a semi-finished product, and processing, cutting and packaging the semi-finished product to obtain the adsorption pad for fine polishing of the electronic display screen.
The invention has the beneficial effects that:
the adsorption pad for fine polishing of the electronic display screen, which is sequentially provided with release paper, double faced adhesive tape, a PET (polyethylene terephthalate) film, double faced adhesive tape, a polyurethane porous material and a polyurethane protective film from top to bottom, is prepared by a hot pressing method, has a unique void structure, has high compression rate and compression rebound rate, is not easy to stick slurry, is easy to clean, is easy to remove, and is acid-alkali-resistant and long in service life; the benzoxazine monomer is subjected to ring opening polymerization under the catalysis of hydrochloric acid to obtain polybenzoxazine with a cross-linked network structure, tetraethoxysilane is subjected to hydrolytic polymerization under an acidic condition to form a Si-O-Si network structure, and the polybenzoxazine and tetraethoxysilane are subjected to hydrolytic polymerization in a DMF solvent systemWherein the benzoxazine monomer contains N and phenol ring, has better flame retardance, and the network structure introduced with Si-O-Si can form SiO when burning2The protective film further reduces the thermal conductivity of the aerogel and improves the flame retardant property of the material, then the doped aerogel is dispersed in absolute ethyl alcohol, under the catalytic action of concentrated sulfuric acid, hydroxyl on the surface of the aerogel and ethylene glycol are subjected to esterification reaction, and further subjected to esterification reaction with hexafluorobutanol to obtain the modified aerogel, due to the existence of the fluoroalkyl chain, the hydrophobicity of the aerogel is improved, and the modified aerogel is added into the adsorption pad material, so that the heat transfer can be effectively inhibited, and the flame retardant property of the material is improved; taking an anti-aging agent 2246 and phosphorus trichloride as revealing raw materials, under the catalytic action of medium-tetradecyl trimethyl ammonium chloride, enabling hydrogen atoms on phenolic hydroxyl groups of the anti-aging agent 2246 and chlorine atoms on the phosphorus trichloride to perform substitution reaction, then enabling the other two chlorine atoms of the phosphorus trichloride and alcoholic hydroxyl groups of pentaerythritol to perform substitution reaction to obtain a composite antioxidant intermediate 1 which is highly symmetrical and contains phosphite ester combination and hindered phenol combination, enabling the intermediate 1 to have better stability due to the symmetrical structure, enabling phosphite ester and hindered phenol structures to cooperatively play an antioxidation role, preparing mesoporous silicon dioxide, namely an intermediate 2 through a template calcination method, dispersing the intermediate 2 in an N, N-dimethylformamide solvent, adding the intermediate 1, enabling the intermediate 1 to enter the intermediate 2 through a gap structure of the intermediate 2 under the ultrasonic action, and finally modifying by utilizing heptadecafluorodecyl trimethoxy silane, the method comprises the following steps of (1) obtaining an auxiliary agent, wherein the surface of the auxiliary agent contains a longer C-F alkyl long chain and has a super-hydrophobic characteristic, mesoporous silicon dioxide serving as an inorganic material can play a toughening and filling role, an intermediate 1 has a stronger antioxidation effect and can prevent the materials from aging, yellowing and physical property reduction caused by external factors such as light, heat and the like, and in the invention, the antioxidant can prevent the chain scission reaction and decomposition reaction of a polymer caused by thermal oxidation; therefore, the adsorption pad prepared by the invention has the performances of high water resistance, corrosion resistance, aging resistance and flame retardance, and has higher use value in the fine polishing process of the electronic display screen.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An adsorption pad for fine polishing of an electronic display screen is sequentially provided with release paper, double-sided adhesive tape, a PET (polyethylene terephthalate) film, double-sided adhesive tape, a polyurethane porous material and a polyurethane protective film from top to bottom;
the adsorption pad for fine polishing of the electronic display screen is prepared by the following steps:
firstly, sticking a PET film above a polyurethane porous material through double-sided adhesive, and sticking release paper above the PET film through the double-sided adhesive to obtain a composite board;
and secondly, placing the composite board in a roller type hot press, carrying out hot pressing on the lower part of the composite board, wherein the hot pressing pressure is 0.3MPa, placing the hot-pressed composite board in a heating device, heating for 10s at 100 ℃, heating the polyurethane protective film at the same temperature, carrying out hot pressing on the polyurethane protective film to the lower part of the composite board to obtain a semi-finished product, and processing, cutting and packaging the semi-finished product to obtain the adsorption pad for fine polishing of the electronic display screen.
The preparation process of the polyurethane porous material comprises the following steps:
step S11, preparing the following raw materials in parts by weight: 80 parts of polyether polyol, 0.4 part of foam stabilizer, 2.5 parts of triethanolamine, 1 part of catalyst, 2.5 parts of deionized water, 30 parts of diphenylmethane diisocyanate, 1 part of foaming agent, 5 parts of modified aerogel and 1 part of auxiliary agent;
step S12, adding polyether polyol, a foam stabilizer, triethanolamine, a catalyst, deionized water, a foaming agent, modified aerogel and an auxiliary agent into a reaction kettle, stirring for 1h at the rotating speed of 800r/min, and standing for 3min to obtain a first component;
and step S13, adding diphenylmethane diisocyanate into the first component, stirring for 2 hours at the rotating speed of 500r/min to obtain a second component, pouring the second component into a mold for foaming, then placing the second component into a heat preservation box for curing for 2 hours at the temperature of 50 ℃, cooling to room temperature, and taking out to obtain the polyurethane porous material.
The modified aerogel is prepared by the following steps:
step A1, adding benzoxazine and N, N-dimethylformamide into a three-neck flask, stirring at a rotating speed of 80r/min until the benzoxazine and the N, N-dimethylformamide are completely dissolved, then adding a hydrochloric acid solution with a concentration of 2mol/L, continuously stirring for 10min, adding tetraethoxysilane into the three-neck flask, increasing the rotating speed to 100r/min, stirring for 20min, transferring to a polypropylene tank, sealing for 7h, aging for 48h, washing for 3 times with absolute ethyl alcohol, washing for 3 times with N-hexane, and finally drying at normal temperature and normal pressure to constant weight to obtain doped aerogel;
and A2, adding the doped aerogel and the absolute ethyl alcohol obtained in the step A1 into a reaction kettle, stirring for 10min at the rotation speed of 100r/min, adding concentrated sulfuric acid and oxalic acid into the reaction kettle, heating to 50 ℃, stirring for 30min at a constant rotation speed, adding hexafluorobutanol into the reaction kettle, keeping the temperature constant, increasing the rotation speed to 200r/min, stirring for 50min, cooling to room temperature, filtering, washing a filter cake with deionized water until the washing liquid is neutral, and finally drying in an oven at 30 ℃ for 24h to obtain the modified aerogel.
In the step A1, the dosage ratio of benzoxazine, N-dimethylformamide, hydrochloric acid solution and ethyl orthosilicate is 15 mmol: 60mL of: 2mL of: 12 mL; the dosage ratio of aerogel, absolute ethyl alcohol, concentrated sulfuric acid, oxalic acid and hexafluorobutanol doped in the step A2 is 1 g: 60mL of: 0.2 mL: 0.5 g: 1mL, and the mass fraction of concentrated sulfuric acid is 95%.
The auxiliary agent is prepared by the following steps:
step S21, adding toluene, tetradecyltrimethyl ammonium chloride and phosphorus trichloride into a four-neck flask, stirring for 10min at the rotating speed of 60r/min, and mixing an anti-aging agent 2246 and the toluene according to the weight ratio of 1 g: uniformly mixing 3mL of the mixed solution to obtain a solvent a, dropwise adding the solvent a into a four-neck flask by using a constant-pressure dropping funnel under the condition of room temperature, controlling the dropwise adding speed to be 1 drop/second, absorbing HCl gas by using a tail gas bottle filled with a sodium hydroxide solution, heating to 50 ℃, stirring at the rotating speed of 100r/min for reaction for 3 hours, after the reaction is finished, adding pentaerythritol into the four-neck flask, heating to 90 ℃, keeping the rotating speed unchanged, continuing the reaction for 5 hours, after the reaction is finished, adding triethylamine to adjust the pH value to 7, distilling at the temperature of 110 ℃ under normal pressure to remove toluene, then adding isopropanol to soak and wash for 3 times, cooling to 0 ℃, crystallizing, filtering, and drying a filter cake in a 50 ℃ oven to constant weight to obtain an intermediate 1;
step S22, adding dodecyl dimethyl benzyl ammonium bromide, urea and deionized water into a beaker, performing ultrasonic dispersion for 10min at the frequency of 20kHz, then adding cyclohexane and isopropanol into the beaker, dropwise adding tetraethoxysilane into the beaker while stirring at the rotating speed of 900r/min at the room temperature, finishing dropwise adding within 20min, stirring and reacting for 16h under the condition of 70 ℃ oil bath, cooling to the room temperature after the reaction is finished, centrifuging for 20min at the rotating speed of 5000r/min, respectively washing the precipitate for 3 times with acetone and deionized water, drying for 12h at the temperature of 60 ℃, grinding, and calcining for 3h at the temperature of 500 ℃ in a muffle furnace to obtain an intermediate 2;
and step S23, adding the intermediate 1 and N, N-dimethylformamide into a beaker, stirring for 10min by using a glass rod, adding the intermediate 2 into the beaker, carrying out ultrasonic treatment for 15min at the frequency of 20kHz, adding heptadecafluorodecyltrimethoxysilane, stirring for reaction for 2h at the rotation speed of 200r/min, filtering, washing a filter cake for 3 times by using an ethanol solution with the mass fraction of 30%, and finally drying for 5h in a 70 ℃ oven to obtain the auxiliary agent.
In the step S21, the dosage ratio of the toluene to the phosphorus trichloride to the anti-aging agent 2246 to the pentaerythritol is 150 mL: 0.22 mol: 0.2 mol: 0.1 mol; wherein the dosage of the tetradecyl trimethyl ammonium chloride is 1 percent of the mass of the anti-aging agent 2246; in step S22, the ratio of the amounts of dodecyldimethylbenzyl ammonium bromide, urea, deionized water, cyclohexane, isopropyl alcohol and ethyl orthosilicate is 3 g: 1.8 g: 90mL of: 90mL of: 2mL of: 9 mL; in step S23, the ratio of the amounts of intermediate 1, N-dimethylformamide, intermediate 2 and heptadecafluorodecyltrimethoxysilane was 1 g: 50mL of: 3 g: 0.1 g.
The polyether polyol is polyether polyol GP-3630, the foam stabilizer is non-hydrolytic high-efficiency soft foam silicone oil DC-580, and the catalyst is catalyst A1 and catalyst A33 according to the mass ratio of 0.05: 1, and the foaming agent is butane.
Example 2
An adsorption pad for fine polishing of an electronic display screen is sequentially provided with release paper, double-sided adhesive tape, a PET (polyethylene terephthalate) film, double-sided adhesive tape, a polyurethane porous material and a polyurethane protective film from top to bottom;
the adsorption pad for fine polishing of the electronic display screen is prepared by the following steps:
firstly, sticking a PET film above a polyurethane porous material through double-sided adhesive, and sticking release paper above the PET film through the double-sided adhesive to obtain a composite board;
and secondly, placing the composite board in a roller type hot press, carrying out hot pressing on the lower part of the composite board, wherein the hot pressing pressure is 0.4MPa, placing the hot-pressed composite board in a heating device for heating for 12s at 108 ℃, heating the polyurethane protective film at the same temperature, carrying out hot pressing on the polyurethane protective film to the lower part of the composite board to obtain a semi-finished product, and processing, cutting and packaging the semi-finished product to obtain the adsorption pad for fine polishing of the electronic display screen.
The preparation process of the polyurethane porous material comprises the following steps:
step S11, preparing the following raw materials in parts by weight: 90 parts of polyether polyol, 0.5 part of foam stabilizer, 2.5 parts of triethanolamine, 1 part of catalyst, 2.5 parts of deionized water, 32 parts of diphenylmethane diisocyanate, 1 part of foaming agent, 8 parts of modified aerogel and 2 parts of auxiliary agent;
step S12, adding polyether polyol, a foam stabilizer, triethanolamine, a catalyst, deionized water, a foaming agent, modified aerogel and an auxiliary agent into a reaction kettle, stirring for 1h at the rotation speed of 900r/min, and standing for 4min to obtain a first component;
and step S13, adding diphenylmethane diisocyanate into the first component, stirring for 3 hours at the rotating speed of 600r/min to obtain a second component, pouring the second component into a mold for foaming, then placing the second component into a heat preservation box for curing for 2 hours at the temperature of 50 ℃, cooling to room temperature, and taking out to obtain the polyurethane porous material.
The modified aerogel is prepared by the following steps:
step A1, adding benzoxazine and N, N-dimethylformamide into a three-neck flask, stirring at a rotating speed of 80r/min until the benzoxazine and the N, N-dimethylformamide are completely dissolved, then adding a hydrochloric acid solution with a concentration of 2mol/L, continuously stirring for 10min, adding tetraethoxysilane into the three-neck flask, increasing the rotating speed to 150r/min, stirring for 20min, transferring to a polypropylene tank, sealing for 7h, aging for 48h, washing for 3 times with absolute ethyl alcohol, washing for 3 times with N-hexane, and finally drying at normal temperature and normal pressure to constant weight to obtain doped aerogel;
and A2, adding the doped aerogel and the absolute ethyl alcohol obtained in the step A1 into a reaction kettle, stirring for 15min at the rotation speed of 100r/min, adding concentrated sulfuric acid and oxalic acid into the reaction kettle, heating to 50 ℃, stirring for 30min at a constant rotation speed, adding hexafluorobutanol into the reaction kettle, keeping the temperature constant, increasing the rotation speed to 250r/min, stirring for 50min, cooling to room temperature, filtering, washing a filter cake with deionized water until the washing liquid is neutral, and finally drying in an oven at 30 ℃ for 24h to obtain the modified aerogel.
In the step A1, the dosage ratio of benzoxazine, N-dimethylformamide, hydrochloric acid solution and ethyl orthosilicate is 15 mmol: 60mL of: 2mL of: 12 mL; the dosage ratio of aerogel, absolute ethyl alcohol, concentrated sulfuric acid, oxalic acid and hexafluorobutanol doped in the step A2 is 1 g: 70mL of: 0.2 mL: 0.5 g: 1mL, and the mass fraction of concentrated sulfuric acid is 95%.
The auxiliary agent is prepared by the following steps:
step S21, adding toluene, tetradecyltrimethyl ammonium chloride and phosphorus trichloride into a four-neck flask, stirring for 10min at a rotating speed of 80r/min, and mixing an anti-aging agent 2246 and the toluene according to a ratio of 1 g: 4mL of the solvent a is uniformly mixed to obtain a solvent a, the solvent a is dripped into a four-neck flask by using a constant-pressure dropping funnel under the condition of room temperature, the dripping speed is controlled to be 2 drops/second, a tail gas bottle filled with a sodium hydroxide solution is used for absorbing HCl gas, then the temperature is raised to 60 ℃, the stirring reaction is carried out for 4 hours under the condition of 150r/min of rotating speed, pentaerythritol is added into the four-neck flask after the reaction is finished, the temperature is raised to 100 ℃, the rotating speed is not changed, the reaction is continued for 6 hours, triethylamine is added after the reaction is finished, the pH value is adjusted to 7, toluene is removed by atmospheric distillation at the temperature of 112 ℃, then isopropanol is added, the mixture is soaked and washed for 4 times, the temperature is reduced to 3 ℃, the mixture is crystallized;
step S22, adding dodecyl dimethyl benzyl ammonium bromide, urea and deionized water into a beaker, performing ultrasonic dispersion for 10min at the frequency of 30kHz, then adding cyclohexane and isopropanol into the beaker, dropwise adding tetraethoxysilane into the beaker while stirring at the rotating speed of 900r/min at the room temperature, finishing dropwise adding within 20min, stirring and reacting for 16h under the condition of 70 ℃ oil bath, cooling to the room temperature after the reaction is finished, centrifuging for 20min at the rotating speed of 7000r/min, respectively washing the precipitate for 3 times with acetone and deionized water, drying for 12h at the temperature of 60 ℃, grinding, and calcining for 3h at the temperature of 500 ℃ in a muffle furnace to obtain an intermediate 2;
and step S23, adding the intermediate 1 and N, N-dimethylformamide into a beaker, stirring for 10min by using a glass rod, adding the intermediate 2 into the beaker, carrying out ultrasonic treatment for 15min at the frequency of 30kHz, adding heptadecafluorodecyltrimethoxysilane, stirring and reacting for 3h at the rotation speed of 250r/min, filtering, washing a filter cake for 4 times by using an ethanol solution with the mass fraction of 30%, and finally drying for 8h in an oven at the temperature of 70 ℃ to obtain the auxiliary agent.
In the step S21, the dosage ratio of the toluene to the phosphorus trichloride to the anti-aging agent 2246 to the pentaerythritol is 180 mL: 0.22 mol: 0.2 mol: 0.1 mol; wherein the dosage of the tetradecyl trimethyl ammonium chloride is 1 percent of the mass of the anti-aging agent 2246; in step S22, the ratio of the amounts of dodecyldimethylbenzyl ammonium bromide, urea, deionized water, cyclohexane, isopropyl alcohol and ethyl orthosilicate is 3 g: 1.8 g: 90mL of: 90mL of: 2mL of: 9 mL; in step S23, the ratio of the amounts of intermediate 1, N-dimethylformamide, intermediate 2 and heptadecafluorodecyltrimethoxysilane was 1 g: 60mL of: 3 g: 0.1 g.
The polyether polyol is polyether polyol GP-3630, the foam stabilizer is non-hydrolytic high-efficiency soft foam silicone oil DC-580, and the catalyst is catalyst A1 and catalyst A33 according to the mass ratio of 0.05: 1, and the foaming agent is butane.
Example 3
An adsorption pad for fine polishing of an electronic display screen is sequentially provided with release paper, double-sided adhesive tape, a PET (polyethylene terephthalate) film, double-sided adhesive tape, a polyurethane porous material and a polyurethane protective film from top to bottom;
the adsorption pad for fine polishing of the electronic display screen is prepared by the following steps:
firstly, sticking a PET film above a polyurethane porous material through double-sided adhesive, and sticking release paper above the PET film through the double-sided adhesive to obtain a composite board;
and secondly, placing the composite board in a roller type hot press, carrying out hot pressing on the lower part of the composite board, wherein the hot pressing pressure is 0.5MPa, placing the hot-pressed composite board in a heating device for heating for 15s at the heating temperature of 115 ℃, heating the polyurethane protective film at the same temperature, carrying out hot pressing on the polyurethane protective film to the lower part of the composite board to obtain a semi-finished product, and processing, cutting and packaging the semi-finished product to obtain the adsorption pad for fine polishing of the electronic display screen.
The preparation process of the polyurethane porous material comprises the following steps:
step S11, preparing the following raw materials in parts by weight: 100 parts of polyether polyol, 0.6 part of foam stabilizer, 2.5 parts of triethanolamine, 1 part of catalyst, 2.5 parts of deionized water, 35 parts of diphenylmethane diisocyanate, 1 part of foaming agent, 10 parts of modified aerogel and 3 parts of auxiliary agent;
step S12, adding polyether polyol, a foam stabilizer, triethanolamine, a catalyst, deionized water, a foaming agent, modified aerogel and an auxiliary agent into a reaction kettle, stirring for 1h at the rotation speed of 1000r/min, and standing for 5min to obtain a first component;
and step S13, adding diphenylmethane diisocyanate into the first component, stirring for 4 hours at the rotation speed of 750r/min to obtain a second component, pouring the second component into a mold for foaming, then placing the second component into a heat preservation box for curing for 2 hours at the temperature of 50 ℃, cooling to room temperature, and taking out to obtain the polyurethane porous material.
The modified aerogel is prepared by the following steps:
step A1, adding benzoxazine and N, N-dimethylformamide into a three-neck flask, stirring at a rotating speed of 80r/min until the benzoxazine and the N, N-dimethylformamide are completely dissolved, then adding a hydrochloric acid solution with a concentration of 2mol/L, continuously stirring for 10min, adding tetraethoxysilane into the three-neck flask, increasing the rotating speed to 200r/min, stirring for 20min, transferring to a polypropylene tank, sealing for 7h, aging for 48h, washing for 3 times with absolute ethyl alcohol, washing for 3 times with N-hexane, and finally drying at normal temperature and normal pressure to constant weight to obtain doped aerogel;
and A2, adding the doped aerogel and the absolute ethyl alcohol obtained in the step A1 into a reaction kettle, stirring for 20min at the rotation speed of 100r/min, adding concentrated sulfuric acid and oxalic acid into the reaction kettle, heating to 50 ℃, stirring for 30min at a constant rotation speed, adding hexafluorobutanol into the reaction kettle, keeping the temperature constant, increasing the rotation speed to 300r/min, stirring for 50min, cooling to room temperature, filtering, washing a filter cake with deionized water until the washing liquid is neutral, and finally drying in an oven at 30 ℃ for 24h to obtain the modified aerogel.
In the step A1, the dosage ratio of benzoxazine, N-dimethylformamide, hydrochloric acid solution and ethyl orthosilicate is 15 mmol: 60mL of: 2mL of: 12 mL; the dosage ratio of aerogel, absolute ethyl alcohol, concentrated sulfuric acid, oxalic acid and hexafluorobutanol doped in the step A2 is 1 g: 80mL of: 0.2 mL: 0.5 g: 1mL, and the mass fraction of concentrated sulfuric acid is 95%.
The auxiliary agent is prepared by the following steps:
step S21, adding toluene, tetradecyltrimethyl ammonium chloride and phosphorus trichloride into a four-neck flask, stirring for 10min at the rotating speed of 100r/min, and mixing an anti-aging agent 2246 and the toluene according to the weight ratio of 1 g: 5mL of the solvent a is uniformly mixed to obtain a solvent a, the solvent a is dripped into a four-neck flask by using a constant-pressure dropping funnel under the condition of room temperature, the dripping speed is controlled to be 3 drops/second, a tail gas bottle filled with a sodium hydroxide solution is used for absorbing HCl gas, then the temperature is raised to 70 ℃, the stirring reaction is carried out for 5 hours under the condition of the rotating speed of 200r/min, pentaerythritol is added into the four-neck flask after the reaction is finished, the temperature is raised to 115 ℃, the rotating speed is not changed, the reaction is continued for 7 hours, triethylamine is added after the reaction is finished, the pH value is adjusted to 8, toluene is removed by normal-pressure distillation at the temperature of 115 ℃, then isopropanol is added for soaking and washing for 5 times, the temperature is reduced to 5 ℃, the crystallization is carried;
step S22, adding dodecyl dimethyl benzyl ammonium bromide, urea and deionized water into a beaker, performing ultrasonic dispersion for 10min at the frequency of 40kHz, then adding cyclohexane and isopropanol into the beaker, dropwise adding tetraethoxysilane into the beaker while stirring at the rotating speed of 900r/min at the room temperature, finishing dropwise adding within 20min, stirring and reacting for 16h under the condition of 70 ℃ oil bath, cooling to the room temperature after the reaction is finished, centrifuging for 20min at the rotating speed of 8000r/min, respectively washing the precipitate for 3 times with acetone and deionized water, drying for 12h at the temperature of 60 ℃, grinding, and calcining for 3h at the temperature of 500 ℃ in a muffle furnace to obtain an intermediate 2;
and step S23, adding the intermediate 1 and N, N-dimethylformamide into a beaker, stirring for 10min by using a glass rod, adding the intermediate 2 into the beaker, carrying out ultrasonic treatment for 15min at the frequency of 40kHz, adding heptadecafluorodecyltrimethoxysilane, stirring for reaction for 4h at the rotation speed of 300r/min, filtering, washing a filter cake for 5 times by using an ethanol solution with the mass fraction of 30%, and finally drying for 10h in a 70 ℃ oven to obtain the auxiliary agent.
In the step S21, the dosage ratio of the toluene to the phosphorus trichloride to the anti-aging agent 2246 to the pentaerythritol is 200 mL: 0.22 mol: 0.2 mol: 0.1 mol; wherein the dosage of the tetradecyl trimethyl ammonium chloride is 2 percent of the mass of the anti-aging agent 2246; in step S22, the ratio of the amounts of dodecyldimethylbenzyl ammonium bromide, urea, deionized water, cyclohexane, isopropyl alcohol and ethyl orthosilicate is 3 g: 1.8 g: 90mL of: 90mL of: 3mL of: 9 mL; in step S23, the ratio of the amounts of intermediate 1, N-dimethylformamide, intermediate 2 and heptadecafluorodecyltrimethoxysilane was 1 g: 70mL of: 3 g: 0.1 g.
The polyether polyol is polyether polyol GP-3630, the foam stabilizer is non-hydrolytic high-efficiency soft foam silicone oil DC-580, and the catalyst is catalyst A1 and catalyst A33 according to the mass ratio of 0.05: 1, and the foaming agent is butane.
Comparative example
This comparative example is a common adsorption pad for polishing on the market.
The absorbent pads of examples 1-3 and comparative example were subjected to performance testing, the results of which are shown in the following table:
as can be seen from the above table, the adsorption pads of examples 1-3 are superior to the comparative examples in the compression recovery rate and limiting oxygen index test processes, have high hydrophobic property, prevent the polishing solution from corroding the adsorption pads, have thermal-oxidative aging resistance, and have great application value in the fine polishing process of the electronic display screen.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (8)
1. An adsorption pad for fine polishing of an electronic display screen is characterized in that release paper, double faced adhesive tape, a PET (polyethylene terephthalate) film, double faced adhesive tape, a polyurethane porous material and a polyurethane protective film are sequentially arranged from top to bottom;
the adsorption pad for fine polishing of the electronic display screen is prepared by the following steps:
firstly, sticking a PET film above a polyurethane porous material through double-sided adhesive, and sticking release paper above the PET film through the double-sided adhesive to obtain a composite board;
and secondly, placing the composite board in a roller type hot press, carrying out hot pressing on the lower part of the composite board, wherein the hot pressing pressure is 0.3-0.5MPa, placing the hot-pressed composite board in a heating device, heating for 10-15s at the heating temperature of 100-115 ℃, heating the polyurethane protective film at the same temperature, carrying out hot pressing on the polyurethane protective film to the lower part of the composite board to obtain a semi-finished product, and processing, cutting and packaging the semi-finished product to obtain the adsorption pad for fine polishing of the electronic display screen.
2. The adsorption pad for fine polishing of electronic display screens according to claim 1, wherein the preparation process of the polyurethane porous material is as follows:
step S11, preparing the following raw materials in parts by weight: 80-100 parts of polyether polyol, 0.4-0.6 part of foam stabilizer, 2.5 parts of triethanolamine, 1 part of catalyst, 2.5 parts of deionized water, 30-35 parts of diphenylmethane diisocyanate, 1 part of foaming agent, 5-10 parts of modified aerogel and 1-3 parts of auxiliary agent;
step S12, adding polyether polyol, a foam stabilizer, triethanolamine, a catalyst, deionized water, a foaming agent, modified aerogel and an auxiliary agent into a reaction kettle, stirring for 1h at the rotation speed of 800-;
and S13, adding diphenylmethane diisocyanate into the first component, stirring for 2-4h at the rotation speed of 500-750r/min to obtain a second component, pouring the second component into a mold for foaming, then placing the second component into a heat preservation box for curing for 2h at 50 ℃, cooling to room temperature, and taking out to obtain the polyurethane porous material.
3. The adsorption pad for fine polishing of electronic display screens according to claim 2, wherein the modified aerogel is prepared by the following steps:
step A1, adding benzoxazine and N, N-dimethylformamide into a three-neck flask, stirring at a rotating speed of 80r/min until the benzoxazine and the N, N-dimethylformamide are completely dissolved, then adding a hydrochloric acid solution with a concentration of 2mol/L, continuously stirring for 10min, adding tetraethoxysilane into the three-neck flask, increasing the rotating speed to 100-200r/min, stirring for 20min, transferring to a polypropylene tank, sealing for 7h, aging for 48h, washing for 3 times with absolute ethyl alcohol, washing for 3 times with N-hexane, and finally drying at normal temperature and normal pressure to constant weight to obtain doped aerogel;
and A2, adding the doped aerogel and the absolute ethyl alcohol obtained in the step A1 into a reaction kettle, stirring for 10-20min at the rotation speed of 100r/min, adding concentrated sulfuric acid and oxalic acid into the reaction kettle, heating to 50 ℃, stirring for 30min at a constant rotation speed, adding hexafluorobutanol into the reaction kettle, keeping the temperature constant, increasing the rotation speed to 200 and 300r/min, stirring for 50min, cooling to room temperature, filtering, washing a filter cake with deionized water until the washing liquid is neutral, and finally drying for 24h in a 30 ℃ oven to obtain the modified aerogel.
4. The adsorption pad for fine polishing of electronic display screens according to claim 3, wherein the ratio of the amounts of benzoxazine, N-dimethylformamide, hydrochloric acid solution and ethyl orthosilicate in step A1 is 15 mmol: 60mL of: 2mL of: 12 mL; the dosage ratio of aerogel, absolute ethyl alcohol, concentrated sulfuric acid, oxalic acid and hexafluorobutanol doped in the step A2 is 1 g: 60-80 mL: 0.2 mL: 0.5 g: 1mL, and the mass fraction of concentrated sulfuric acid is 95%.
5. The adsorption pad for fine polishing of electronic display screens according to claim 2, wherein the auxiliary agent is prepared by the following steps:
step S21, adding toluene, tetradecyltrimethyl ammonium chloride and phosphorus trichloride into a four-neck flask, stirring for 10min at the rotating speed of 60-100r/min, and mixing an anti-aging agent 2246 and toluene according to the weight ratio of 1 g: 3 to 5mL of the mixture is uniformly mixed to obtain a solvent a, the solvent a is dripped into a four-neck flask by a constant pressure dropping funnel under the condition of room temperature, the dripping speed is controlled to be 1 to 3 drops/second, a tail gas bottle filled with sodium hydroxide solution is used for absorbing HCl gas, then heating to 50-70 ℃, stirring and reacting for 3-5h under the condition of the rotating speed of 100-, adding pentaerythritol into a four-neck flask, heating to 90-115 ℃, keeping the rotating speed unchanged, continuing to react for 5-7 hours, after the reaction is finished, adding triethylamine to adjust the pH value to 7-8, distilling at 110-115 ℃ under normal pressure to remove toluene, then adding isopropanol, soaking and washing for 3-5 times, cooling to 0-5 ℃, crystallizing, filtering, and drying a filter cake in a 50 ℃ oven to constant weight to obtain an intermediate 1;
step S22, adding dodecyl dimethyl benzyl ammonium bromide, urea and deionized water into a beaker, performing ultrasonic dispersion for 10min at the frequency of 20-40kHz, then adding cyclohexane and isopropanol into the beaker, dropwise adding tetraethoxysilane into the beaker while stirring at the rotating speed of 900r/min at the room temperature, finishing dropwise adding within 20min, stirring and reacting for 16h under the condition of oil bath at 70 ℃, cooling to the room temperature after the reaction is finished, centrifuging for 20min at the rotating speed of 5000 plus 8000r/min, washing the precipitate for 3 times with acetone and deionized water respectively, drying for 12h at the temperature of 60 ℃, grinding, and calcining for 3h at the temperature of 500 ℃ in a muffle furnace to obtain an intermediate 2;
step S23, adding the intermediate 1 and N, N-dimethylformamide into a beaker, stirring for 10min by using a glass rod, adding the intermediate 2 into the beaker, carrying out ultrasonic treatment for 15min at the frequency of 20-40kHz, adding heptadecafluorodecyltrimethoxysilane, carrying out stirring reaction for 2-4h under the condition of the rotation speed of 200-40 r/min, filtering, washing a filter cake for 3-5 times by using an ethanol solution with the mass fraction of 30%, and finally drying for 5-10h in an oven at the temperature of 70 ℃ to obtain the auxiliary agent.
6. The adsorption pad for fine polishing of electronic display screens as claimed in claim 5, wherein the dosage ratio of toluene, phosphorus trichloride, anti-aging agent 2246 and pentaerythritol in step S21 is 150-: 0.22 mol: 0.2 mol: 0.1 mol; wherein the dosage of the tetradecyl trimethyl ammonium chloride is 1-2% of the mass of the anti-aging agent 2246; in step S22, the ratio of the amounts of dodecyldimethylbenzyl ammonium bromide, urea, deionized water, cyclohexane, isopropyl alcohol and ethyl orthosilicate is 3 g: 1.8 g: 90mL of: 90mL of: 2-3 mL: 9 mL; in step S23, the ratio of the amounts of intermediate 1, N-dimethylformamide, intermediate 2 and heptadecafluorodecyltrimethoxysilane was 1 g: 50-70 mL: 3 g: 0.1 g.
7. The adsorption pad for fine polishing of an electronic display screen according to claim 2, wherein the polyether polyol is polyether polyol GP-3630, the foam stabilizer is non-hydrolytic high-efficiency soft foam silicone oil DC-580, and the catalyst is catalyst A1 and catalyst A33 in a mass ratio of 0.05: 1, and the foaming agent is one or two of butane, isobutane, 2, 3-dimethylbutane and isopentane which are mixed according to any proportion.
8. The preparation method of the adsorption pad for fine polishing of the electronic display screen according to claim 1, characterized by comprising the following steps:
firstly, sticking a PET film above a polyurethane porous material through double-sided adhesive, and sticking release paper above the PET film through the double-sided adhesive to obtain a composite board;
and secondly, placing the composite board in a roller type hot press, carrying out hot pressing on the lower part of the composite board, wherein the hot pressing pressure is 0.3-0.5MPa, placing the hot-pressed composite board in a heating device, heating for 10-15s at the heating temperature of 100-115 ℃, heating the polyurethane protective film at the same temperature, carrying out hot pressing on the polyurethane protective film to the lower part of the composite board to obtain a semi-finished product, and processing, cutting and packaging the semi-finished product to obtain the adsorption pad for fine polishing of the electronic display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110259843.3A CN113025222B (en) | 2021-03-10 | 2021-03-10 | Adsorption pad for fine polishing of electronic display screen and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110259843.3A CN113025222B (en) | 2021-03-10 | 2021-03-10 | Adsorption pad for fine polishing of electronic display screen and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113025222A true CN113025222A (en) | 2021-06-25 |
| CN113025222B CN113025222B (en) | 2022-02-18 |
Family
ID=76469070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110259843.3A Active CN113025222B (en) | 2021-03-10 | 2021-03-10 | Adsorption pad for fine polishing of electronic display screen and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113025222B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113954363A (en) * | 2021-11-25 | 2022-01-21 | 横店集团东磁股份有限公司 | Hot bed platform for high-temperature 3D printing and preparation method thereof |
| CN114702912A (en) * | 2022-03-18 | 2022-07-05 | 安徽禾臣新材料有限公司 | Adsorption pad for polishing glass display screen and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903596A (en) * | 2017-01-23 | 2017-06-30 | 安徽禾臣新材料有限公司 | TFT attenuated polishing absorption layers |
-
2021
- 2021-03-10 CN CN202110259843.3A patent/CN113025222B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903596A (en) * | 2017-01-23 | 2017-06-30 | 安徽禾臣新材料有限公司 | TFT attenuated polishing absorption layers |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113954363A (en) * | 2021-11-25 | 2022-01-21 | 横店集团东磁股份有限公司 | Hot bed platform for high-temperature 3D printing and preparation method thereof |
| CN114702912A (en) * | 2022-03-18 | 2022-07-05 | 安徽禾臣新材料有限公司 | Adsorption pad for polishing glass display screen and preparation method thereof |
| CN114702912B (en) * | 2022-03-18 | 2023-10-17 | 安徽禾臣新材料有限公司 | Adsorption pad for polishing glass display screen and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113025222B (en) | 2022-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113025222B (en) | Adsorption pad for fine polishing of electronic display screen and production method thereof | |
| CN104530377A (en) | Temperature-adjustable polyurethane material for car cover and preparation method of temperature-adjustable polyurethane material | |
| CN102181260A (en) | Preparation method of halogen-free flame-retardant polyurethane (PU) sealant | |
| CN113651592A (en) | Preparation method of anti-buffering silicon dioxide aerogel heat insulation sheet | |
| CN106243302B (en) | Water blown inorganic hybridization polyurethane with melamine rigid foam material and its manufacture method | |
| CN113620643A (en) | Preparation method of powder falling prevention silicon dioxide aerogel felt | |
| CN114835872B (en) | High-flame-retardance low-heat-conductivity polyurethane foam material and preparation method thereof | |
| CN108033453A (en) | A kind of preparation method of modified precipitated silica | |
| CN113150712B (en) | Adsorption pad for electronic display screen production and preparation process thereof | |
| CN111978912A (en) | Organic silicon modified polyurethane sealing material and preparation method thereof | |
| CN110421921B (en) | Impervious bentonite waterproof blanket and processing technology thereof | |
| CN113480273B (en) | Composite flame-retardant building material and preparation method thereof | |
| CN105968789B (en) | A kind of lightweight Organic-inorganic composite insulating foam and preparation method | |
| CN113214773A (en) | High-temperature-resistant heat-insulating polyurethane sealant and preparation method thereof | |
| CN111304910A (en) | Ceramic fiber/hydrophobic silicon dioxide aerogel composite material and preparation method thereof | |
| CN114685282B (en) | Production process for hydrogenation reduction of o-phenylenediamine | |
| CN114046008B (en) | Waterproof building outer wall heat insulation structure and construction method thereof | |
| CN113084695B (en) | Buffering polishing pad for fine polishing of electronic display screen and production method thereof | |
| CN112521867B (en) | Low-modulus high-elasticity two-component silane modified polyether sealant and preparation method thereof | |
| CN112851910A (en) | Anti-aging high-flame-retardant polyurethane sponge, preparation method and application thereof | |
| CN113980637A (en) | Low-viscosity low-density polyurethane pouring sealant | |
| CN106437017A (en) | Self-insulation wallboard poured with polyurethane sandwich layer and manufacturing and forming method of self-insulation wallboard | |
| CN112159586A (en) | Preparation method of high-strength composite sound absorption material | |
| CN116515445A (en) | Sealant for hollow glass and preparation method thereof | |
| CN114231020B (en) | Quick-drying packaging material for thin film capacitor and production process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221230 Address after: Room 519, Science and Technology Innovation Center, Sichuan University, No. 24, South Section 1, 1st Ring Road, Wuhou District, Chengdu, Sichuan 610000 Patentee after: Chengdu Hechen New Material Technology Co.,Ltd. Address before: 243000 No.1 standardized workshop, laoxiahedong Road, he County Economic Development Zone, Ma'anshan City, Anhui Province Patentee before: ANHUI HECHEN NEW MATERIAL CO.,LTD. |