CN109852108B - Silica gel coating film and preparation method thereof - Google Patents
Silica gel coating film and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a silica gel coating film which comprises a base material and a silica gel coating arranged on the base material, wherein the silica gel coating consists of silica gel, an adhesive and a thickening agent. Correspondingly, the invention also discloses a preparation method of the silica gel coating film. The silica gel coating provided by the invention has the adhesion property and can be directly adhered to the base material through the mutual matching and interaction of the silica gel, the adhesive and the thickening agent, so that a thicker silica gel coating can be formed, and the moisture absorption of the film is further improved. In addition, the preparation method is simple, and can reduce the production process and time.
Description
Technical Field
The invention relates to the technical field of coating films, in particular to a silica gel coating film and a preparation method thereof.
Background
With the development of economy in China and the continuous improvement of the living standard of people, the requirement on the quality of ambient air is continuously improved, an energy-saving ventilation system is being developed and utilized, the development of the current generation, the fourth generation of rotating wheels and adsorption materials are developed, the advanced solid adsorption technology is adopted, the continuous stable and large-load air humidity conditioning operation can be realized, and particularly, the ultralow air dew point of-70 ℃ can be realized under the working condition of low temperature and low humidity. The air solid adsorption and separation mainly adopts a rotating disc type metal adsorbent at present, in the dehumidification process, an adsorption rotating disc is driven by a driving device to slowly rotate, when the adsorption rotating disc adsorbs water molecules in an air treatment area to reach a saturated state, the adsorption rotating disc enters a regeneration area to be subjected to desorption regeneration by high-temperature air, the process is repeated, and dry air is continuously sent into a formulated space after being subjected to temperature regulation to achieve high-precision temperature and humidity control. Aluminum foil is widely used in a rotating wheel device because of its excellent heat dissipation performance and is commonly used as a temperature conversion medium, while silica gel has good adsorption performance and molecular sieves selectively absorb moisture and is often used as a desiccant, but how the aluminum foil and the silica gel or the molecular sieves can be firmly combined becomes a problem to be solved.
Patent publication No. CN102580692A discloses a method for preparing a silica gel aluminum foil for an air treatment system, which comprises coating a layer of 0.5-2 μm thick cross-linked resin on the surface of a 0.03-0.25mm thick aluminum foil, drying at high temperature, coating a layer of 0.02-0.04mm thick silica gel on the cross-linked resin, and drying at high temperature. The method needs two times of coating and two times of drying, and has complex steps, time consumption and labor consumption. In addition, the silica gel with the thickness of 0.02-0.04mm is coated on the cross-linked resin with the thickness of 0.5-2 μm, the thickness of the silica gel coating is far greater than that of the cross-linked resin coating, and the cross-linked resin can only bond part of the silica gel. Further, the adhesive capacity of the resin is limited, so that the thickness of the silica gel coating is limited, and the water absorption performance and the heat conduction performance of the silica gel aluminum foil are affected.
In addition, the silica gel aluminum foil is mainly applied to the ventilation device. Specifically, superpose multilayer silica gel aluminium foil, form silica gel aluminum plate, then punch a hole to silica gel aluminum plate, form the through-hole that the shape is various, let more air carry out the convection current. Because the existing silica gel aluminum foil has lower tensile resistance, the aluminum foil is easy to tear when being stamped, and the yield of products is reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a silica gel coating film which is simple in structure and good in water absorption.
The technical problem to be solved by the invention is to provide a silica gel coating film with good tensile property.
The technical problem to be solved by the invention is to provide a preparation method of a silica gel coating film, which is simple and has high production efficiency.
In order to solve the above technical problems, the present invention provides a silica gel coating film, comprising:
a substrate;
a silica gel coating disposed on the substrate, the silica gel coating comprising silica gel, a binder, and a thickener, wherein,
the average pore distance of the silica gel is 2.45-2.85nm, and the surface area is 680-720m2The pore volume is 0.36-0.38 ml/g;
the above-mentionedThe thickener is one or more of polyacrylate, methylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methylcellulose, and has viscosity of 1000-1800mm2/s；
The adhesive is one or more of cross-linked resin, water-based acrylic resin and modified acrylate adhesive.
As an improvement of the scheme, the silica gel coating is composed of the following raw materials in parts by weight:
80-150 parts of silica gel
1.6-3 parts of adhesive
0.08-0.15 part of thickening agent.
As an improvement of the scheme, the modified acrylate adhesive is composed of the following raw materials in parts by weight:
as an improvement of the scheme, the thickening agent is polyacrylate, and the viscosity of the thickening agent is 1200-1500mm2/s。
As an improvement of the proposal, the thickening agent is methylcellulose, and the viscosity of the thickening agent is 1300-1600mm2/s。
As an improvement of the scheme, the base material is an aluminum foil or a copper foil, and the thickness of the base material is 0.03-0.07 mm.
As an improvement of the scheme, the thickness of the silica gel coating is 30-40 μm.
As an improvement of the scheme, the silica gel coating is arranged on one side or two sides of the base material.
Correspondingly, the invention also provides a preparation method of the silica gel coating film, which comprises the following steps:
providing a substrate;
will 80Uniformly mixing 150 parts of silica gel, 1.6-3 parts of adhesive, 0.08-0.15 part of thickening agent and water to obtain a silica gel coating mixed material, wherein the viscosity of the silica gel coating mixed material is 40-60mm2/s；
Uniformly coating the silica gel coating mixed material on a base material;
and drying the base material part coated with the silica gel coating at the temperature of 150-300 ℃.
As an improvement of the scheme, the viscosity of the silica gel coating mixed material is 45-55mm2/s。
The implementation of the invention has the following beneficial effects:
1. the silica gel coating provided by the invention has the adhesion property and can be directly adhered to the base material through the mutual matching and interaction of the silica gel, the adhesive and the thickening agent, so that a thicker silica gel coating can be formed, and the moisture absorption of the film is further improved. In addition, compared with the existing silica gel coating film, the silica gel coating film can be directly adhered to a base material, and the production process and time are reduced without twice coating and curing.
2. According to the invention, the acrylate, the cross-linking agent, the functional monomer, the emulsifier and the initiator are matched and interacted with each other to prepare the modified acrylate adhesive with small (nanometer) particle size, uniform distribution, good film-forming property and good mechanical property, so that the adhesive force of the silica gel coating can be improved, and the water absorption property of the silica gel cannot be influenced. In addition, the modified acrylate adhesive of the invention can also enhance the tensile resistance of the silica gel coating film.
3. According to the invention, the thickening agent is added to increase the viscosity of the silica gel coating mixing material, so that the adhesive force of the silica gel coating is further increased. Specifically, the viscosity of the silica gel coating mixed material is adjusted to 40-60mm2And/s, the mixed material can be uniformly coated on the base material, and the coating efficiency can be improved.
4. The invention limits the type and viscosity of the thickening agent so as to enable the silica gel coating material to reach the preset viscosity without influencing the water absorption performance of the silica gel.
Drawings
FIG. 1 is a schematic representation of a silica gel coated film of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the silicone coating film provided by the invention comprises a substrate 1 and a silicone coating 2 arranged on the substrate 1, wherein the silicone coating 2 is composed of silicone, a binder and a thickener.
Specifically, the silica gel coating is composed of the following raw materials in parts by weight:
80-150 parts of silica gel
1.6-3 parts of adhesive
0.08-0.15 part of thickening agent.
In the production process of the silica gel aluminum foil, in order to adhere the silica gel material to the aluminum foil, a layer of resin is coated on the aluminum foil, and then the silica gel material is coated on the resin for curing. The adhesive capacity of the resin is limited, so that the thickness of the silica gel coating is limited, and the water absorption performance and the heat conduction performance of the silica gel aluminum foil are influenced.
The silica gel coating has the adhesion performance and can be directly adhered to a base material, so that a thicker silica gel coating can be formed. Preferably, the thickness of the silica gel coating is 30-40 μm. If the thickness of the silica gel coating is less than 30 mu m, the water absorption performance of the silica gel film is influenced; if the thickness of the silica gel coating is higher than 40 μm, the absorption performance of the silica gel coating reaches a constant state, and the increase of the thickness of the coating only causes waste. More preferably, the thickness of the silica gel coating is 35 μm.
It should be noted that the silica gel coating can be disposed on one or both sides of the substrate according to the needs of the customer.
Because the silica gel of the invention needs to be mixed with the adhesive and the thickening agent to form the silica gel coating mixed material, the adhesive and the thickening agent can easily enter the micropores of the silica gel, in order to ensure the water absorption performance of the silica gel coating, the invention specifically limits the characteristics of the silica gel, specifically, the average pore distance of the silica gel is 2.45-2.85nm, and the surface area is 680-720m2The pore volume is 0.36-0.38 ml/g. Preferably, the silica gel has an average pore distance of 2.50-2.70nm and a surface area of 690-710m2The pore volume is 0.36-0.38 ml/g. If the silica gel with the specification is not adopted in the invention, the moisture absorption of the silica gel coating can be reduced by 20-40%.
The adhesive is mixed in the silica gel, so that the silica gel can be directly adhered to a base material with adhesive property without additionally coating an adhesive layer on the base material. Specifically, the adhesive is one or more of cross-linked resin, water-based acrylic resin and modified acrylate adhesive.
Since mixing the binder in the colloidal silica affects the water absorption property of the colloidal silica, the binder of the present invention is preferably a modified acrylate binder. The modified acrylate adhesive provided by the invention can improve the adhesive force of the silica gel coating and cannot influence the water absorption performance of the silica gel. In addition, the modified acrylate adhesive of the invention can also enhance the tensile resistance of the silica gel coating film.
Specifically, the modified acrylate adhesive is prepared from the following raw materials in parts by weight:
the preparation method of the modified acrylate adhesive comprises the following steps:
(1) providing raw materials according to a formula;
(2) adding methyl methacrylate, butyl acrylate, acrylic acid, acrylonitrile, phenylacetic acid, N-hydroxy acrylamide, an initiator, 60-70% of calculated emulsifier and water into a container for heating, heating to 70-80 ℃, reacting for 3 hours, preserving the temperature for 2 hours, cooling to room temperature, filtering to obtain a mixed solution, and adjusting the pH value of the mixed solution to 7.0;
(3) adding the rest emulsifier and water used in the step (2) into a container, and heating to 70-80 ℃ while stirring;
(4) and (3) dropwise adding the mixed liquid obtained in the step (2) into the emulsifier obtained in the step (3) for 3-3.5h, preserving the heat for 2-2.5h after dropwise adding, cooling to room temperature, filtering, and adjusting the pH of the filtrate to 7.0 to obtain the modified acrylate adhesive.
The invention prepares the adhesive with small particle size (nanometer level), uniform distribution, good film forming property and good mechanical property by the mutual matching and interaction of the acrylate, the cross-linking agent, the functional monomer, the emulsifier and the initiator.
It is noted that the initiator of the present invention is a persulfate, and the emulsifier includes sodium dodecyl sulfate, allyloxy nonylphenol polyoxyethylene (10) ether ammonium sulfate (DNS-86), and nonylphenol polyoxyethylene ether.
The emulsifier is an important factor in the polymerization reaction, and has an inseparable relationship with the stability of the polymerization system and the size of the average particle diameter of the emulsion. The invention selects 3 kinds of emulsifiers for compounding, not only has good emulsion stability and monomer conversion rate, but also greatly improves the light transmittance. Specifically, DNS-86 is a reactive emulsifier, and the molecular structure of the emulsifier has both groups capable of participating in reaction and emulsifying groups. In a polymerization system, the polymer can form micelles or solubilized micelles, stabilize emulsion and directly participate in reaction. After the film is formed, the reactive emulsifier and the polymer are fixed together by chemical bonds, and the flowing difficulty is high, so that the emulsifier is not easy to migrate to the surface of the emulsion film, the water resistance of the obtained microemulsion film is greatly improved, and the stability of the microemulsion is enhanced.
According to the invention, the thickening agent is added to increase the viscosity of the silica gel coating mixing material, so that the adhesive force of the silica gel coating is further increased. Specifically, the viscosity of the silica gel coating mixed material is adjusted to 40-60mm2And/s, the mixed material can be uniformly coated on the base material, and the coating efficiency can be improved. If the viscosity of the silica gel coating mixture is less than 40mm2The adhesive force of the silica gel coating is reduced, the thickness of the silica gel coating coated once is reduced, the coating time is prolonged, and the tensile resistance of the silica gel coating film is influenced; if the viscosity of the silica gel coating mixed material is higher than 60mm2And/s, the thickness of the silica gel coating coated once is increased, so that the thickness of the silica gel coating exceeds a preset range, and the cost is increased. Preferably, the silica gel coating compositionHas a viscosity of 45-55mm2/s。
In order to enable the silica gel coating mixed material to reach the preset viscosity and not to influence the water absorption performance of the silica gel, the invention specifically limits the thickening agent selected for the silica gel coating. The thickening agent is one or more of polyacrylate, methylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose, and further has a viscosity of 1000-1800mm2And s. The viscosity adopted by the invention is 1000-1800mm2The thickening agent can quickly and accurately adjust the viscosity of the silica gel coating mixture to a preset range. The thickening agent has good stability, does not react with silica gel and an adhesive, and does not influence the water absorption performance of the silica gel. Specifically, the cellulose thickener associates with surrounding water molecules through hydrogen bonds through a hydrophobic main chain, so that the fluid volume of the polymer is increased, the free movement space of particles is reduced, and the viscosity of the system is increased. Further, the cellulose-based thickener has high thickening efficiency and is used in a small amount.
Based on the existing silica gel coating film production process and environmental protection requirements, the thickening agent is methyl cellulose, and the viscosity of the thickening agent is 1300-1600mm2/s。
In addition, the polyacrylate increases the viscosity of the aqueous phase by stretching the molecular chain from a helical shape to a rod shape by the electrostatic repulsion of the hydroxy acid ions of the same polarity. Furthermore, the polyacrylate can be bridged with the silica gel to form a net structure, so that the tensile resistance of the silica gel coating is improved.
More preferably, the thickening agent is polyacrylate, and the viscosity of the thickening agent is 1200-1500mm2/s。
The substrate 1 is an aluminum foil or a copper foil, but is not limited thereto. Preferably, the thickness of the substrate is 0.03 to 0.07 mm. Specifically, the thickness of the substrate may be 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07 mm. If the thickness of the base material is less than 0.03mm, the thickness of the base material is too thin, the base material is easy to tear when coated with the silica gel coating mixed material, and the formed silica gel coating film is low in tensile resistance and also easy to tear in the subsequent stamping process. Because the silica gel coating of the invention is composed of the silica gel, the adhesive and the thickening agent, the tensile resistance of the silica gel coating is enhanced through the interaction of the three substances, the thickness of the base material can be controlled within the range of 0.03-0.07mm, and the base material with too thick thickness is not needed, thereby reducing the cost.
Correspondingly, the invention also provides a preparation method of the silica gel coating film, which comprises the following steps:
providing a substrate;
uniformly mixing 80-150 parts of silica gel, 1.6-3 parts of adhesive, 0.08-0.15 part of thickening agent and water to obtain a silica gel coating mixed material, wherein the viscosity of the silica gel coating mixed material is 40-60mm2/s；
Uniformly coating the silica gel coating mixed material on a base material;
and drying the base material part coated with the silica gel coating at the temperature of 150-300 ℃.
The invention adjusts the viscosity of the silica gel coating mixed material to 40-60mm2And/s, the mixed material can be uniformly coated on the base material, and the coating efficiency can be improved. If the viscosity of the silica gel coating mixture is less than 40mm2The adhesive force of the silica gel coating is reduced, the thickness of the silica gel coating coated once is reduced, the coating time is prolonged, and the tensile resistance of the silica gel coating film is influenced; if the viscosity of the silica gel coating mixed material is higher than 60mm2And/s, the thickness of the silica gel coating coated once is increased, so that the thickness of the silica gel coating exceeds a preset range, and the cost is increased. Preferably, the viscosity of the silica gel coating mixture is 45-55mm2/s。
The invention will now be illustrated by the following specific examples
Example 1
A silica gel coating film comprises an aluminum foil and a silica gel coating arranged on the aluminum foil;
the silica gel coating is prepared from the following raw materials in parts by weight:
80 parts of silica gel
Adhesive 1.6 parts
0.08 part of thickening agent;
the average pore distance of the silica gel is 2.45-2.85nm, and the surface area is 680-720m2Per gram, the pore volume is 0.36-0.38ml/g, and the thickening agent is carboxymethyl cellulose 1000mm2And/s, the adhesive is a crosslinked resin.
Example 2
A silica gel coating film comprises an aluminum foil and a silica gel coating arranged on the aluminum foil;
the silica gel coating is prepared from the following raw materials in parts by weight:
90 parts of silica gel
Adhesive 1.8 parts
0.09 part of thickening agent;
the average pore distance of the silica gel is 2.45-2.85nm, and the surface area is 680-720m2The pore volume is 0.36-0.38ml/g, the thickening agent is hydroxyethyl cellulose, and the viscosity of the thickening agent is 1100mm2And/s, the adhesive is water-based acrylic resin.
Example 3
A silica gel coating film comprises an aluminum foil and a silica gel coating arranged on the aluminum foil;
the silica gel coating is prepared from the following raw materials in parts by weight:
100 portions of silica gel
2 portions of adhesive
0.1 part of thickening agent;
the average pore distance of the silica gel is 2.45-2.85nm, and the surface area is 680-720m2The pore volume is 0.36-0.38ml/g, the thickening agent is hydroxypropyl methyl cellulose, and the viscosity of the thickening agent is 1200mm2And/s, the adhesive is a crosslinking resin and a water-based acrylic resin.
Example 4
A silica gel coating film comprises an aluminum foil and a silica gel coating arranged on the aluminum foil;
the silica gel coating is prepared from the following raw materials in parts by weight:
110 portions of silica gel
2.2 parts of adhesive
0.11 part of thickening agent;
average pore of the silica gelThe distance is 2.45-2.85nm, the surface area is 680-720m2The pore volume is 0.36-0.38ml/g, the thickening agent is polyacrylate, and the viscosity of the thickening agent is 1400mm2And/s, the adhesive is a modified acrylate adhesive.
Example 5
A silica gel coating film comprises an aluminum foil and a silica gel coating arranged on the aluminum foil;
the silica gel coating is prepared from the following raw materials in parts by weight:
120 parts of silica gel
Adhesive 2.4 parts
0.12 part of thickening agent;
the average pore distance of the silica gel is 2.45-2.85nm, and the surface area is 680-720m2The pore volume is 0.36-0.38ml/g, the thickening agent is methyl cellulose, and the viscosity of the thickening agent is 1600mm2And/s, the adhesive is a modified acrylate adhesive.
Example 6
A silica gel coating film comprises an aluminum foil and a silica gel coating arranged on the aluminum foil;
the silica gel coating is prepared from the following raw materials in parts by weight:
130 parts of silica gel
Adhesive 2.6 parts
0.13 part of thickening agent;
the average pore distance of the silica gel is 2.45-2.85nm, and the surface area is 680-720m2The pore volume is 0.36-0.38ml/g, the thickening agent is polyacrylate and methylcellulose, and the viscosity of the thickening agent is 1500mm2And/s, the adhesive is a modified acrylate adhesive.
Example 7
A silica gel coating film comprises an aluminum foil and a silica gel coating arranged on the aluminum foil;
the silica gel coating is prepared from the following raw materials in parts by weight:
140 parts of silica gel
Adhesive 2.8 parts
0.14 part of thickening agent;
the average pore distance of the silica gel is 2.45-2.85nm, and the surface area is 680-720m2The pore volume is 0.36-0.38ml/g, the thickening agent is methyl cellulose, carboxymethyl cellulose and hydroxyethyl cellulose, and the viscosity of the thickening agent is 1700mm2And/s, the adhesive is a modified acrylate adhesive.
Example 8
A silica gel coating film comprises an aluminum foil and a silica gel coating arranged on the aluminum foil;
the silica gel coating is prepared from the following raw materials in parts by weight:
150 parts of silica gel
3 portions of adhesive
0.15 part of thickening agent;
the average pore distance of the silica gel is 2.45-2.85nm, and the surface area is 680-720m2The pore volume is 0.36-0.38ml/g, the thickening agent is methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose, the viscosity of the thickening agent is 1800mm2And/s, the adhesive is a water-based acrylic resin and modified acrylate adhesive.
Comparative example 1
A silica gel coating film comprises an aluminum foil, cross-linked resin arranged on the aluminum foil and silica gel arranged on the cross-linked resin.
Comparative example 2
A silica gel coating film comprises an aluminum foil and a silica gel coating arranged on the aluminum foil, wherein the silica gel coating is made of silica gel and cross-linked resin.
Comparative example 3
A silica gel coating film comprises an aluminum foil and a silica gel coating arranged on the aluminum foil, wherein the silica gel coating is made of silica gel and water-based acrylic resin.
The silicone coated films of examples 1-8 and comparative examples 1-3 were tested and the results were as follows:
| item | Moisture absorption capacity (g/m)2) | Stretching resistance (Mpa) | Elongation (%) | Adhesion (grade) |
| Example 1 | 12 | 170 | 5 | ≥3 |
| Example 2 | 12 | 175 | 6 | ≥3 |
| Example 3 | 13 | 170 | 5 | ≥3 |
| Example 4 | 13 | 180 | 6 | ≥3.5 |
| Example 5 | 14 | 180 | 6 | ≥3.5 |
| Example 6 | 15 | 180 | 7 | ≥3.5 |
| Example 7 | 15 | 180 | 7 | ≥3.5 |
| Example 8 | 15 | 180 | 7 | ≥3.5 |
| Comparative example 1 | 6 | 125 | 2 | ≥2.5 |
| Comparative example 2 | 6 | 130 | 2 | ≥2 |
| Comparative example 3 | 6 | 130 | 2 | ≥2.5 |
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (9)
1. A silica gel coated film, comprising:
a substrate;
the silica gel coating of setting on the substrate, the thickness of silica gel coating is 30-40 μm, the silica gel coating is made by silica gel coating compounding, silica gel coating compounding comprises silica gel, adhesive and thickener, the viscosity of silica gel coating compounding is 40-60mm2/s；
Wherein the average pore distance of the silica gel is 2.45-2.85nm, and the specific surface area is 680-720m2The pore volume is 0.36-0.38 ml/g;
the thickening agent is one or more of polyacrylate, methylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose, and the viscosity of the thickening agent is 1800mm2/s；
The adhesive is one or more of cross-linked resin, water-based acrylic resin and modified acrylate adhesive.
2. The silica gel coated film of claim 1, wherein the silica gel coating composition is comprised of the following raw materials in parts by weight:
80-150 parts of silica gel
1.6-3 parts of adhesive
0.08-0.15 part of thickening agent.
3. The silica gel coated film according to claim 2, wherein the modified acrylate adhesive is composed of the following raw materials in parts by weight:
20-30 parts of methyl methylpropionate
15-20 parts of butyl acrylate
1-3 parts of acrylic acid
1-3 parts of acrylonitrile
8-13 parts of phenylacetic acid
2-6 parts of N-hydroxy acrylamide
2-4 parts of emulsifier
0.5-1 part of initiator.
4. The silica gel coated film of claim 1, wherein the thickener is polyacrylate and has a viscosity of 1200-1500mm2/s。
5. The silica gel coated film of claim 1, wherein the thickener is methylcellulose and has a viscosity of 1300-1600mm2/s。
6. The silica-gel coated film according to claim 1, wherein the substrate is an aluminum foil or a copper foil, and the thickness of the substrate is 0.03 to 0.07 mm.
7. The silica gel coated film of claim 1, wherein the silica gel coating is disposed on one or both sides of the substrate.
8. A method for preparing the silica gel coated thin film according to any one of claims 1 to 7, comprising:
providing a substrate;
uniformly mixing 80-150 parts of silica gel, 1.6-3 parts of adhesive, 0.08-0.15 part of thickening agent and water to obtain a silica gel coating mixed material, wherein the viscosity of the silica gel coating mixed material is 40-60mm2/s；
Uniformly coating the silica gel coating mixed material on a base material;
and drying the base material part coated with the silica gel coating at the temperature of 150-300 ℃.
9. The method of preparing a silica gel coated film according to claim 8, wherein the silica gel coating composition has a viscosity of 45 to 55mm2/s。
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| CN102166511A (en) * | 2010-12-31 | 2011-08-31 | 广州慧谷化学有限公司 | Corrosion-resistant hygroscopic coat and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102166511A (en) * | 2010-12-31 | 2011-08-31 | 广州慧谷化学有限公司 | Corrosion-resistant hygroscopic coat and preparation method thereof |
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| Title |
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| 大孔容高比表面积硅胶的制备;赵希鹏;《中国优秀硕士学位论文全文数据库 工程科技Ι辑》;20130615(第7期);第6-7页第2.1.1.2节 * |
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