WO2018059450A1

WO2018059450A1 - Hydrophilic anti-settling far-infrared absorber material and manufacturing method thereof, and kitchen appliance product and manufacturing method thereof

Info

Publication number: WO2018059450A1
Application number: PCT/CN2017/103715
Authority: WO
Inventors: 赵莉
Original assignee: 广东美的厨房电器制造有限公司; 美的集团股份有限公司
Priority date: 2016-09-29
Filing date: 2017-09-27
Publication date: 2018-04-05
Also published as: JP6704516B2; CN106433247B; JP2019536836A; CN106433247A

Abstract

A hydrophilic anti-settling far-infrared absorber material and manufacturing method thereof, and kitchen appliance product and manufacturing method thereof. The hydrophilic anti-settling far-infrared absorber material comprises, in parts by weight, the following components: 49-83.2 parts of a binder, 1-20 parts of an absorber, 10-20 parts of a far-infrared powder agent, 5-10 parts of an anti-settling agent, and 0.8-1.5 parts of an adjuvant. The manufacturing method of the absorber material comprises mixing portions according to the proportions. The kitchen appliance product of the present invention is obtained by coating the absorber material on a surface of a substrate of the kitchen appliance product, and curing the same to form a coating layer.

Description

Hydrophilic anti-settling far-infrared absorbing material, preparation method thereof, kitchen electric product and preparation method thereof

Technical field

The invention belongs to the technical field of coatings, and in particular relates to a hydrophilic anti-settling far-infrared absorbing material, a preparation method thereof, a kitchen electric product and a preparation method thereof.

Background technique

It is well known that the absorbing agents used in the microwave industry are mostly ferrites, carbides, nitrides, etc., which are densely mixed with binders, solvents, etc., and are made of absorbing materials. The sedimentation of the agent seriously affects the application of the absorbing material, and affects the actual absorbing effect of the absorbing material and the temperature rise stability. It is more likely that the temperature is too high and the safety of use arises.

In addition, related microwave devices made of absorbing materials, cooking foods are prone to over-fired surfaces and uncooked food inside, affecting the consumer experience and actual cooking effects.

The above problems have seriously affected the application of absorbing materials in the microwave industry, and can not meet the growing barbecue and baking requirements of microwave product consumers.

The microwave absorbing material technology of the existing microwave industry mainly adds a high-density absorbing agent to the silica gel binder, and adds an appropriate amount of auxiliaries. After mechanical stirring, the sulphide cross-linking is pressed into a silica absorbing sheet of about 2 mm, that is, The final absorbing sheet can be made, and the absorbing sheet is adhered to the surface of the substrate with an adhesive to form a microwave absorbing accessory. However, the microwave baking tray made by this method has the following disadvantages:

1. The absorbing agent is unevenly dispersed and easy to settle, which will result in a large difference in microwave absorbing properties of batch products of the same specification type, and even local overheating and melting phenomenon due to uneven dispersion of absorbing agent;

2. Using a large amount of resin materials such as silica gel, resulting in excessive thickness of the absorbing material;

3. Without far-infrared performance, the inside of the food is prone to unfamiliar phenomenon;

4. The production process is complicated, time-consuming and time-consuming;

5. It does not have easy cleaning performance, and it is easy to cause oil stain adhesion for a long time.

At present, the absorbing materials used in the microwave industry are rarely seen in the use of absorbing coatings, and the absorbing materials which have anti-settling, far-infrared properties and stable absorbing properties are impossible to find. It is limited to thick-layer absorbers with complicated processes and does not have easy-to-clean performance, which is completely unable to meet future needs. Thin layer, convenient, and excellent absorbing coatings are the trend!

Summary of the invention

In view of the problems existing in the prior art, the present invention provides a hydrophilic anti-settling far-infrared absorbing material and a system thereof The preparation method can be used in the microwave oven products, and aims to solve the uneven dispersion and easy sedimentation of the absorbing agent for the microwave absorbing materials of the current microwave products, which may cause a large difference in microwave absorbing properties of the batch products of the same specification model, and even cause The uneven dispersion of the absorbing agent produces local superheated melting phenomenon; the use of a large amount of resin materials such as silica gel causes the absorbing layer to be too thick; without the far-infrared property, the inside of the food is prone to unfamiliar phenomenon; the production process is complicated, time-consuming and time-consuming; It does not have easy-to-clean performance, and it may cause problems such as adhesion of oil stains due to long-term use.

The technical solution of the present invention to solve the above technical problems is as follows:

A hydrophilic anti-settling far-infrared absorbing material comprises the following components by weight: 49-83.2 parts of binder, 1-20 parts of absorbing agent, 10-20 parts of far-infrared powder, anti-settling agent 5-10 Parts, additives 0.8 to 1.5 parts.

Binder: A material that has good bonding properties with the absorbing material and the substrate material to be coated (for example, a baking sheet material), and has a temperature resistance which is not easily decomposed at a high temperature.

Absorbing agent: A material that can be well dispersed in a binder to efficiently absorb microwave energy in a microwave environment.

The beneficial effects of the invention are:

The main functions of the binder are: the absorbing agent can be well dispersed therein and adhered to the surface of the substrate; it has good temperature resistance and meets the requirements for use in a high temperature environment; and has good hydrophilic properties.

The main function of the absorbing agent is to absorb the microwave energy and convert it into heat to the appliance to achieve rapid heat absorption and heat transfer.

The main function of the far-infrared powder is that the far-infrared rays emitted have a strong penetrating ability and can penetrate the food deeper.

The main function of the anti-settling agent is to increase the consistency of the entire coating system and the suspension properties of the filler, to make the coating thixotropic, prevent the sedimentation of the filler, and further improve the hydrophilic property of the material.

The main function of the auxiliary agent is to make the components of the coating evenly mixed and the coating performance is excellent.

For the first time, the inventors mixed anti-settling agents with binders, absorbing agents, far-infrared powders and auxiliaries, and adopted appropriate ratios to make the prepared hydrophilic anti-settling absorbing materials have absorbing waves. The agent is uniformly dispersed, is not easy to settle, has small differences in microwave absorbing properties, thin coating, simple production process, time saving, good hydrophilic property, easy adhesion to oil, easy cleaning, and improved penetration of food. In order to better absorb energy inside the food, realize the desire of cooking inside and outside the food, and comprehensively improve the cooking effect of the microwave microwave accessory.

Based on the above technical solutions, the present invention can also be improved as follows.

Further, the binder is a mixed solution of a sol and a silicate solution.

The beneficial effects of using the above scheme are:

The sol is used alone, and the cleaning performance is not good. The silicate is used alone, and the film forming property and strength are not good. By using a combination of a sol and a silicate solution, the effect of the coating property and the easy-cleaning property can be achieved as compared with the use of the sol or silicate solution alone.

Further, the sol is selected from one or a mixture of a silica sol and an aluminum sol.

The beneficial effects of the above scheme are that one or two of the silica sol and the aluminum sol are used, which is beneficial to further improve the adhesion property, film forming performance and temperature resistance of the coating.

The parameter range of the silica sol: the content of the effective substance is 20% to 40%. The advantage of adopting the above parameter range is that the sol has good stability and the coating is easy to form a film.

The parameter range of the aluminum sol: the content of the effective substance is 20% to 40%. The advantage of adopting the above parameter range is that the sol has good stability and the coating is easy to form a film.

The effective substance in the silica sol refers to silica, and the effective substance in the aluminum sol refers to alumina.

That is, the mass fraction of silica in the silica sol is 20% to 40%. The mass fraction of alumina in the aluminum sol is 20% to 40%.

Further, the silicate solution is selected from a mixture of one or more of a sodium silicate solution, a potassium silicate solution, and a lithium silicate solution.

The beneficial effects of the above scheme are that the use of the above-mentioned silicate solution is advantageous for further improving the bonding property of the coating material with the substrate and improving the temperature resistance property which is not easily decomposed under high temperature conditions.

Further, in the silicate solution, the mass fraction of the silicate is 20% to 30%.

The beneficial effect of adopting the above scheme is that the mass fraction of the suitable silicate is beneficial to the combination of the silicate and the sol, the prepared coating has good film forming performance, good adhesion property, and the temperature resistance can meet the use requirements.

Further, the absorbing agent is selected from one or more of carbon nanotubes, silicon nitride, and barium titanate.

The beneficial effects of adopting the above scheme are: having a good absorbing effect, and being sufficiently mixed with other raw materials to avoid affecting the performance of the material due to uneven mixing.

The parameter range of the carbon nanotubes may be: the carbon nanotubes have a particle size of less than 10 nm. The parameter range of the silicon nitride may be: the silicon nitride particle size is less than 2 μm. The parameter of barium titanate may be as follows: the barium titanate particle size is less than 60 nm. Taking the above range of parameters is beneficial to improve the performance of the material produced.

Further, the anti-settling agent comprises hydrophilic fumed silica and/or fumed alumina.

The beneficial effects of using the above scheme are as follows: the invention adopts hydrophilic fumed silica, vapor phase alumina with appropriate amount of dispersing aid, and other components are made into absorbing coating, which can be uniformly suspended in the coating system, Thickening and thixotropy and chemical stability make the coating have excellent anti-settling and uniformity, which solves the uneven dispersion and easy sedimentation of the absorbing agent, which will lead to large difference in microwave absorbing properties of batch products of the same specification. Even the problem of local overheating and melting due to uneven dispersion of the absorbing agent may occur.

When the hydrophilic fumed silica and the fumed alumina are used in combination, the anti-settling effect is better, preferably, when the hydrophilic fumed silica and the fumed alumina are mixed at a mass ratio (3-6):1. When the anti-settling effect is further improved.

The parameter range of hydrophilic fumed silica: specific surface area is 200±20m2/g; using this parameter range is beneficial to obtain a suitable specific surface area, achieve anti-settling performance, and low cost.

The parameter range of fumed alumina: specific surface area is 100±20m2/g; using this parameter range is beneficial to obtain a suitable specific surface area, achieve anti-settling performance, and low cost.

Further, the far-infrared powder is selected from two or more of silicon carbide, iron oxide, magnesium oxide, zinc oxide, and aluminum oxide.

The beneficial effects of using the above scheme are: using the above-mentioned far-infrared powder, the far-infrared rays emitted have a strong penetrating ability, and can penetrate the food deeper, thereby improving the baking effect. More than two kinds of mixing are used, and the far-infrared effect is better than the single use.

The parameters of silicon carbide, iron oxide, magnesium oxide, zinc oxide and aluminum oxide are as follows: the particle size is less than 50 nm; the use of the above parameters is beneficial to improve the properties of the material.

Further, the auxiliary agent is selected from one or more of a dispersing agent, an adhesion promoter, and an antifoaming agent.

The beneficial effect of the above scheme is that the main function of the dispersing agent improves the dissolving and dispersing property of the anti-settling agent and the absorbing agent in the system, so that the whole coating system is uniform and stable; the main function of the defoaming agent is to reduce the surface tension and thereby defoaming. The role of the antifoaming agent; the main role of the adhesion promoter is to improve the wetting ability of the coating system and the substrate, thereby increasing the adhesion of the coating to the substrate.

The invention provides a preparation method of a hydrophilic anti-settling far-infrared absorbing material, comprising the steps of: mixing the components together according to the above ratio.

The method for mixing and the specific conditions of the present invention are not particularly limited, and an appropriate stirring speed and stirring time can be selected according to specific conditions.

The beneficial effects of using the above scheme are:

The preparation method of the hydrophilic anti-settling far-infrared absorbing material of the invention has the advantages that the absorbing agent is uniformly dispersed, is not easy to settle, has small difference in microwave absorbing properties, is thin in coating, simple in production process, saves time and materials, and is hydrophilic. Good performance, not easy to cause oil stain adhesion, easy to clean, improve the penetration of food, make the inside of the food better absorb energy, realize the desire of cooking inside and the surface of the food, and improve the cooking effect of the microwave microwave accessory. advantage.

Further, the auxiliary agent includes a dispersing agent, an adhesion promoter, and an antifoaming agent, and includes the following steps:

1) Preparation of dispersant-binder mixing system:

Mixing the proportion of the binder with a part of the dispersing aid according to the mixing ratio, and mixing to obtain a dispersant-binder mixing system;

2) Preparation of anti-settling system:

Adding a proportion of the anti-settling agent and the antifoaming agent to the dispersant-binder mixing system prepared in the step 1), and mixing, to obtain an anti-settling system;

3) Preparation of anti-settling absorbing system:

Adding the absorbing agent and the adhesion promoter to the anti-settling system prepared in the step 2), and mixing, to obtain an anti-settling absorbing system;

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

The anti-settling absorbing system prepared in the step 3) is added with a far-infrared powder and a residual dispersing agent, and mixed to obtain a hydrophilic anti-settling far-infrared absorbing material.

Preferably, the mass ratio of the dispersant added in step 4) to the dispersant added in step 1) is (2 to 3): 5.

The beneficial effect of adopting the above scheme is that the above-mentioned order of addition is advantageous for rapid mixing of the components, and the performance of the material obtained due to uneven mixing is not good.

Further, the ratio of the dispersant, the antifoaming agent and the adhesion promoter is such that the mass ratio of the dispersing agent to the antifoaming agent is (2 to 3): 1, and the mass ratio of the dispersing agent to the adhesion promoter is ( 1.5 to 2): 1.

The beneficial effects of the above scheme are as follows: the components of the components can be further compatible and mixed well, and the obtained coating can be well adhered to the substrate. Dispersants, defoamers, and adhesion promoters in a suitable ratio provide superior dispersion, adhesion, and defoaming properties.

The present invention provides a kitchen appliance product comprising a substrate and a coating disposed on a surface of the substrate, the coating being made of the hydrophilic anti-settling far infrared absorbing material described above.

In the specific use, it is also possible to provide a coating other than the coating made of the hydrophilic anti-settling absorbing material of the present invention in the kitchen electric product according to a specific case.

The hydrophilic anti-settling absorbing material of the invention can be used for all kitchen electric products based on microwave performance. For example, it can be used in microwave products such as microwave ovens and microwave ovens, with excellent anti-settling and uniformity, high temperature resistance, excellent absorbing properties, excellent hydrophilic properties, easy cleaning performance, thin coating and simple production process. The antibacterial function is good, the far infrared function is good, and the cooking effect of the food is improved.

The invention provides a preparation method of a kitchen electric product, which is sprayed on the surface of a base material of a kitchen electric product by the above-mentioned hydrophilic anti-settling far-infrared absorbing material, and then solidified to form a hydrophobic oleophobic type absorbing material. Floor.

Before spraying, the surface of the substrate of the kitchen electric product can be subjected to a pretreatment process to further improve the bonding effect between the coating and the substrate.

The beneficial effects of the above solution are as follows: the preparation method of the invention is simple, has excellent anti-settling property and uniformity, high temperature resistance, excellent absorbing property, excellent hydrophilic property, easy cleaning performance, thin coating, The production process is simple, the antibacterial function, the far infrared function is good, and the cooking effect of the food is improved.

detailed description

The principles and features of the present invention are described below, and the examples are only for explaining the present invention, and are not intended to be limiting. The scope of the invention.

The components used in the present invention can be obtained commercially or by conventional techniques in the art unless otherwise specified.

Preferably, the binder in the hydrophilic anti-settling far infrared absorbing material of the present invention is 49% to 83.2%, the absorbing agent is 1% to 20%, and the far infrared powder is 10%. 20%, anti-settling agent is 5% to 10%, and auxiliary agent is 0.8% to 1.5%.

The binder is a mixed solution of a sol and a silicate solution. The sol is selected from one or a mixture of a silica sol and an aluminum sol.

The silica sol is a colloidal solution formed by uniformly diffusing silica colloidal particles in water, also known as a silicic acid solution, and the molecular formula can be expressed as mSiO ₂ ·H ₂ O. It can be prepared by an electrodialysis method, an ion exchange method, a silicon dissolution method, a peptization method or a dispersion method. The silica sol in the examples of the present invention can be prepared by a sol-gel method.

The chemical formula of the aluminum sol is a(Al ₂ O ₃ ·nH ₂ O)·bHx·cH ₂ O, wherein: Al ₂ O ₃ ·nH ₂ O is hydrated alumina, Hx is a peptizer, coefficient: b<a, c, n. It can be prepared by the hydrochloric acid method.

The silicate solution is selected from a mixture of one or more of a sodium silicate solution, a potassium silicate solution, and a lithium silicate solution. In the silicate solution, the mass fraction of the silicate is 20% to 30%, and preferably the mass fraction of the silicate is 25%.

The absorbing agent is selected from one or more of carbon nanotubes, silicon nitride, and barium titanate.

In various embodiments, the parameters of the carbon nanotubes may range from a carbon nanotube particle size of less than 10 nm. The parameter range of the silicon nitride may be: the silicon nitride particle size is less than 2 μm. The parameter of barium titanate may be as follows: the barium titanate particle size is less than 60 nm. Taking the above range of parameters is beneficial to improve the performance of the material produced.

The anti-settling agent includes hydrophilic fumed silica and/or fumed alumina. The inventors have unexpectedly discovered in the study that when the hydrophilic fumed silica and the fumed alumina are used in combination, the anti-settling effect is better, preferably, when the hydrophilic fumed silica and the fumed alumina are mass ratio (3 to 6): When the mixture is mixed, the anti-settling effect is further improved.

Hydrophilic fumed silica, CAS NO: 112 945-52-5 Molecular formula: SiO ₂ , white fluffy powder, porous, non-toxic, tasteless, non-polluting, high temperature resistant. A gas phase method, also known as a pyrolysis method, a dry method or a combustion method, can be used. The raw material is silicon tetrachloride, oxygen (or air) and hydrogen, which are reacted at a high temperature.

The vapor phase alumina is a high temperature combustion hydrolysis process of aluminum trichloride (AlCl ₃ ). In this process, aluminum trichloride is converted into a gas phase, and then hydrolyzed with an oxyhydrogen flame combustion product to form a product gas phase nano-aluminum oxide, the chemical reaction equation is: 2AlCl ₃ +3H ₂ +1.5O ₂ → Al ₂ O ₃ +6 HCl.

In each of the examples, the parameter range of the hydrophilic fumed silica: the specific surface area is 200±20 m 2 /g; using the parameter range is advantageous for obtaining a suitable specific surface area, achieving anti-settling performance, and low cost. The parameter range of fumed alumina: specific surface area is 100±20m2/g; using this parameter range is beneficial to obtain a suitable specific surface area, achieve anti-settling performance, and low cost.

The hydrophilic fumed silica A200 used in the examples was purchased from Evonik Degussa, Germany.

The far-infrared powder is selected from two or more of silicon carbide, iron oxide, magnesium oxide, zinc oxide, and aluminum oxide.

In each of the examples, the parameters of the silicon carbide, iron oxide, magnesium oxide, zinc oxide, and aluminum oxide are as follows: the particle diameter is less than 50 nm; and the above parameters are used to improve the performance of the material.

The auxiliary agent is selected from one or more of a dispersing agent, an adhesion promoter, and an antifoaming agent. In each of the examples, specifically, the dispersing agent is one of BYK-301 and SER-AD FA607, BYK-301 can be purchased from BYK Chemical Company of Germany, and SER-AD FA607 can be purchased from Shengwo Company. The adhesion promoter is DOWCORNING 2-6032 and can be purchased from Dow Corning Corporation. The defoaming agent is one of emulsified silicone oil 284P and high-efficiency defoaming agent JN-5. 284P can be purchased from Shanghai Resin Factory, and JN-5 can be purchased from Nanjing Chemical Industry Institute Wujin Water Quality Stabilizer Factory.

1) Preparation of dispersant-binder mixing system:

2) Preparation of anti-settling system:

3) Preparation of anti-settling absorbing system:

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Further, the inventors unexpectedly discovered in the study that the ratio of the dispersing agent, the antifoaming agent and the adhesion promoter The relationship is: the mass ratio of the dispersant to the antifoaming agent is (2 to 3): 1, the mass ratio of the dispersing agent to the adhesion promoter is (1.5 to 2): 1. By using the above ratio, the performance of the coating can be further improved.

More specific operations are:

1) Preparation of dispersant-binder mixing system:

Mixing the proportion of the binder with a part of the dispersing aid according to the mixing ratio, mechanically stirring until the dispersing agent is completely dissolved, and the system is uniform, thereby obtaining a dispersing agent-binder mixing system;

2) Preparation of anti-settling system:

Adding a proportion of the anti-settling agent and the antifoaming agent to the dispersant-binder mixing system prepared in the step 1), adjusting the appropriate mechanical stirring speed until the components are uniformly mixed to obtain an anti-settling system;

3) Preparation of anti-settling absorbing system:

Adding the absorbing agent and the adhesion promoter to the mixing system prepared in the step 2), mechanically stirring for several minutes, and mixing to obtain an anti-settling absorbing system;

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

The far-infrared powder and the residual dispersing agent are added to the mixed system prepared in the step 3), and mechanically stirred until uniformly dispersed, thereby obtaining a final product-hydrophilic anti-settling far-infrared absorbing material.

The invention provides a preparation method of a kitchen electric product, which is sprayed on the surface of a base material of a kitchen electric product by the above-mentioned hydrophilic anti-settling far-infrared absorbing material, and then solidified to form a hydrophobic oleophobic type absorbing material. Floor. Curing can be carried out by baking.

The following is introduced through some specific embodiments.

Example 1

A hydrophilic anti-settling far-infrared absorbing material and a preparation method thereof, the composition of the coating is: binder is 64.6 kg, absorbing agent is 4 kg, far-infrared powder is 20 kg, anti-settling agent is 10 kg The additive is 1.4 kg.

The preparation method is as follows:

1) Preparation of dispersant-binder mixing system:

Mix 64.6 kg of binder (including 15 kg of silica sol, 15 kg of aluminum sol, 6.6 kg of lithium silicate solution, 20 kg of sodium silicate solution and 8 kg of potassium silicate solution) with 0.5 kg of dispersing aid SER-AD FA607 , 300r / min mechanical stirring until the dispersing agent is completely dissolved, the system is uniform, and a dispersant-binder mixing system is obtained;

2) Preparation of anti-settling system:

Add 8 kg of hydrophilic fumed silica A200, 2 kg of fumed alumina and 0.3 kg of defoamer high-efficiency defoamer JN-5, 100r/min to the dispersant-binder mixing system prepared in step 1) After mechanical stirring for 5 min, 500 r / min mechanical stirring for 10 min to make the components evenly mixed to obtain an anti-settling system;

3) Preparation of anti-settling absorbing system:

Add 4 kg of absorbing agent (including 1 kg of carbon nanotubes, 1 kg of silicon nitride and 2 kg of barium titanate) and 0.4 kg of adhesion promoter DOW CORNING 2-6032 to the anti-settling system prepared in step 2). 200r/min mechanical stirring for 10min, so that the components are uniformly mixed to obtain anti-settling absorbing system;

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Add 20 kg of far-infrared powder (including 8 kg of silicon carbide, 5 kg of iron oxide and 7 kg of zinc oxide) and 0.2 kg of dispersing aid SER-AD FA607, 500r/min to the anti-settling absorbing system prepared in step 3) The final product, the hydrophilic anti-settling far-infrared absorbing material, can be obtained by mechanical stirring for 15 min.

In the above, the content of the effective substance in the sol is 30%, and the mass fraction of the silicate in the silicate solution is 25%.

Example 2

A hydrophilic anti-settling far-infrared absorbing material and a preparation method thereof, the composition of the coating is: binder is 67.6 kg, absorbing agent is 6 kg, far-infrared powder is 15 kg, anti-settling agent is 10 kg The additive is 1.4 kg.

The preparation method is as follows:

1) Preparation of dispersant-binder mixing system:

67.6 kg of binder (including 25 kg of silica sol, 10 kg of aluminum sol, 5.6 kg of lithium silicate solution, 13 kg of sodium silicate solution and 14 kg of potassium silicate solution) were mixed with 0.5 kg of dispersing aid BYK-301. 300r/min mechanical stirring until the dispersing agent is completely dissolved and the system is uniform, and a dispersant-binder mixing system is obtained;

2) Preparation of anti-settling system:

Add 8 kg of hydrophilic fumed silica A200, 2 kg of fumed alumina and 0.3 kg of defoamer high-efficiency defoamer JN-5 to the mixing system prepared in step 1). After mechanical stirring for 5 min at 100 r/min, 500r /min mechanically stirred for 10 min to make the components evenly mixed to obtain an anti-settling system;

3) Preparation of anti-settling absorbing system:

Add 6 kg of absorbing agent (including 0.6 kg of carbon nanotubes, 2 kg of silicon nitride and 3.4 kg of barium titanate) and 0.4 kg of adhesion promoter DOW CORNING 2-6032 to the anti-settling system prepared in step 2). 200 r / min mechanical stirring for 10 min, so that the components are mixed, to obtain anti-settling absorbing system;

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Add 15 kg of far-infrared powder (including 6 kg of silicon carbide, 4 kg of zinc oxide, 1 kg of magnesium oxide and 4 kg of alumina) and 0.2 kg of dispersing aid BYK-301 to the anti-settling absorbing system prepared in step 3). , 500r/min machine After stirring for 15 minutes, the final product, the hydrophilic anti-settling far-infrared absorbing material, can be obtained.

In the above, the content of the effective substance in the sol is 20%, and the mass fraction of the silicate in the silicate solution is 20%.

Example 3

A hydrophilic anti-settling far-infrared absorbing material and a preparation method thereof, the composition of the coating is: binder is 70.6 kg, absorbing agent is 8 kg, far-infrared powder is 10 kg, anti-settling agent is 10 kg. The additive is 1.4 kg.

The preparation method is as follows:

1) Preparation of dispersant-binder mixing system:

70.6 kg of binder (including 22.6 kg of silica sol, 16 kg of lithium silicate solution, 16 kg of sodium silicate solution and 16 kg of potassium silicate solution) was mixed with 0.5 kg of dispersing aid BYK-301, mechanical stirring at 300 r/min When the dispersant is completely dissolved and the system is uniform, a dispersant-binder mixture system is obtained;

2) Preparation of anti-settling system:

Add 8 kg of hydrophilic fumed silica A200, 2 kg of fumed alumina and 0.3 kg of defoamer emulsified silicone oil 284P to the mixing system prepared in step 1), mechanically stir for 5 min at 100 r/min, and mechanically stir at 500 r/min. The components were uniformly mixed for 10 minutes to prepare an anti-settling system;

3) Preparation of anti-settling absorbing system:

Add 8 kg of absorbing agent (including 0.2 kg of carbon nanotubes, 3 kg of silicon nitride and 4.8 kg of barium titanate) and 0.4 kg of adhesion promoter DOW CORNING 2-6032 to the anti-settling system prepared in step 2). 200 r / min mechanical stirring for 10 min, so that the components are mixed, to obtain anti-settling absorbing system;

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Add 10 kg of far-infrared powder (including 3 kg of silicon carbide, 2 kg of magnesium oxide, 3 kg of iron oxide and 2 kg of alumina) and 0.2 kg of dispersing aid BYK-301 to the anti-settling absorbing system prepared in step 3). , 500r / min mechanical stirring for 15min, you can get the final product - hydrophilic anti-settling far infrared absorbing material.

In the above, the content of the effective substance in the sol is 40%, and the mass fraction of the silicate in the silicate solution is 30%.

Example 4

A hydrophilic anti-settling far-infrared absorbing material and a preparation method thereof, the composition of the coating is: binder is 63.5 kg, absorbing agent is 10 kg, far-infrared powder is 15 kg, anti-settling agent is 10 kg The additive is 1.5 kg.

The preparation method is as follows:

1) Preparation of dispersant-binder mixing system:

63.5 kg of binder (including 31.5 kg of silica sol, 3 kg of aluminum sol, 22 kg of lithium silicate solution and 7 kg of potassium silicate solution) was mixed with 0.5 kg of dispersing aid SER-AD FA607, and mechanically stirred at 300 r/min. Disperse The agent is completely dissolved and the system is uniform, and a dispersant-binder mixing system is obtained;

2) Preparation of anti-settling system:

Add 8 kg of hydrophilic fumed silica A200, 2 kg of fumed alumina and 0.3 kg of defoamer emulsified silicone oil 284P to the dispersant-binder mixing system prepared in step 1), and mechanically stir for 5 min at 100 r/min. 500 r / min mechanical stirring for 10 min to make the components evenly mixed to obtain an anti-settling system;

3) Preparation of anti-settling absorbing system:

Add 10 kg of absorbing agent (including 5 kg of silicon nitride and 5 kg of barium titanate) to 0.4 kg of adhesion promoter DOW CORNING 2-6032, mechanically stirred for 10 min at 200 r/min. Mixing the components to obtain an anti-settling absorbing system;

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Add 15 kg of far-infrared powder (including 6 kg of silicon carbide, 4 kg of zinc oxide, 1 kg of magnesia and 4 kg of alumina) and 0.3 kg of dispersing aid SER-AD to the anti-settling absorbing system prepared in step 3) FA607, 500r / min mechanical stirring for 15min, you can get the final product - hydrophilic anti-settling far infrared absorbing material.

Example 5

A hydrophilic anti-settling far-infrared absorbing material and a preparation method thereof, the composition of the coating is: binder is 63.5 kg, absorbing agent is 16 kg, far-infrared powder is 12 kg, anti-settling agent is 7 kg. The additive is 1.5 kg.

The preparation method is as follows:

1) Preparation of dispersant-binder mixing system:

63.5 kg of binder (including 9 kg of silica sol, 7 kg of aluminum sol, 22 kg of lithium silicate solution and 25.5 kg of sodium silicate solution) was mixed with 0.5 kg of dispersing aid SER-AD FA607, and mechanically stirred at 300 r/min. The dispersant is completely dissolved and the system is uniform, and a dispersant-binder mixture system is obtained;

2) Preparation of anti-settling system:

Add 6 kg of hydrophilic fumed silica A200, 1 kg of fumed alumina and 0.3 kg of defoamer emulsified silicone oil 284P to the dispersant-binder mixing system prepared in step 1), and mechanically stir for 5 min at 100 r/min. 500 r / min mechanical stirring for 10 min to make the components evenly mixed to obtain an anti-settling system;

3) Preparation of anti-settling absorbing system:

Add 16 kg of absorbing agent (including 8 kg of silicon nitride and 8 kg of barium titanate) to 0.4 kg of adhesion promoter DOW CORNING 2-6032, mechanically stirred for 10 min at 200 r/min. , the components are uniformly mixed to obtain an anti-settling absorbing system;

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Add 12 kg of far-infrared powder (including 2 kg of zinc oxide, 2 kg of magnesia, 2 kg of alumina and 6 iron oxide) and 0.3 kg of dispersing aid SER-AD FA607 to the anti-settling absorbing system prepared in step 3) , 500r / min mechanical stirring for 15min, you can get the final product - hydrophilic anti-settling far infrared absorbing material.

Example 6

A hydrophilic anti-settling far-infrared absorbing material and a preparation method thereof, the composition of the coating is: binder is 63.5 kg, absorbing agent is 20 kg, far-infrared powder is 10 kg, anti-settling agent is 5 kg The additive is 1.5 kg.

The preparation method is as follows:

1) Preparation of dispersant-binder mixing system:

63.5 kg of binder (including 11 kg of silica sol, 7 kg of aluminum sol, 11.5 kg of lithium silicate solution, 30 kg of sodium silicate solution and 4 kg of potassium silicate solution) was mixed with 0.5 kg of dispersing aid BYK-301. 300r/min mechanical stirring until the dispersing agent is completely dissolved and the system is uniform, and a dispersant-binder mixing system is obtained;

2) Preparation of anti-settling system:

Add 4 kg of hydrophilic fumed silica A200, 1 kg of fumed alumina and 0.3 kg of defoamer high-efficiency defoamer JN-5 to the mixing system prepared in step 1), mechanically stir for 5 min at 100 r/min, 500 r /min mechanically stirred for 10 min to make the components evenly mixed to obtain an anti-settling system;

3) Preparation of anti-settling absorbing system:

Add 20 kg of absorbing agent (including 10 kg of silicon nitride and 10 kg of barium titanate) to 0.4 kg of adhesion promoter DOW CORNING 2-6032, mechanically stirred for 10 min at 200 r/min. , the components are uniformly mixed to obtain an anti-settling absorbing system;

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Add 10 kg of far-infrared powder (including 3 kg of silicon carbide, 2 kg of magnesia, 3 kg of iron oxide and 2 kg of alumina) and 0.3 kg of dispersing aid BYK-301 to the anti-settling absorbing system prepared in step 3). , 500r / min mechanical stirring for 15min, you can get the final product - hydrophilic anti-settling far infrared absorbing material.

Example 7

A hydrophilic anti-settling far-infrared absorbing material and a preparation method thereof, the composition of the coating is: binder is 83.2 kg, absorbing agent is 1 kg, far-infrared powder is 10 kg, anti-settling agent is 5 kg. The additive is 0.8 kg.

The preparation method is as follows:

1) Preparation of dispersant-binder mixing system:

83.2 kg of binder (including 18 kg of silica sol, 12.2 kg of aluminum sol, 13 kg of lithium silicate solution, 15 kg of sodium silicate solution and 25 kg of potassium silicate solution) was mixed with 0.2 kg of dispersing aid BYK-301. 300r/min mechanical stirring until the dispersing agent is completely dissolved and the system is uniform, and a dispersant-binder mixing system is obtained;

2) Preparation of anti-settling system:

Add 4 kg of hydrophilic fumed silica A200, 1 kg of fumed alumina and 0.2 kg of defoamer emulsified silicone oil 284P to the dispersant-binder mixing system prepared in step 1), and mechanically stir for 5 min at 100 r/min. 500 r / min mechanical stirring for 10 min to make the components evenly mixed to obtain an anti-settling system;

3) Preparation of anti-settling absorbing system:

Add 1 kg of absorbing agent (1 kg of carbon nanotubes) to 0.2 kg of adhesion promoter DOW CORNING 2-6032, and mechanically stir for 200 min at 200 r/min for the anti-settling system prepared in step 2) to mix the components. Uniform, to obtain anti-settling absorbing system;

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Add 10 kg of far-infrared powder (including 3 kg of silicon carbide, 2 kg of magnesium oxide, 3 kg of iron oxide and 2 kg of alumina) and 0.2 kg of dispersing aid BYK-301 to the anti-settling absorbing system prepared in step 3). , 500r / min mechanical stirring for 10min, you can get the final product - hydrophilic anti-settling far infrared absorbing material.

Example 8

A hydrophilic anti-settling far-infrared absorbing material and a preparation method thereof, the composition of the coating is: 50 kg of binder, 20 kg of absorbing agent, 20 kg of far-infrared powder, and 8.5 kg of anti-settling agent The additive is 1.5 kg.

The preparation method is as follows:

1) Preparation of dispersant-binder mixing system:

50 kg of binder (including 10 kg of silica sol, 10 kg of aluminum sol, 10 kg of lithium silicate solution, 10 kg of sodium silicate solution and 10 kg of potassium silicate solution) was mixed with 0.5 kg of dispersing aid BYK-301. 300r/min mechanical stirring until the dispersing agent is completely dissolved and the system is uniform, and a dispersant-binder mixing system is obtained;

2) Preparation of anti-settling system:

Add 6.5 kg of hydrophilic fumed silica A200, 2 kg of fumed alumina and 0.3 kg of defoamer high-efficiency defoamer JN-5, 100r/min to the dispersant-binder mixing system prepared in step 1) After mechanical stirring for 5 min, 500 r / min mechanical stirring for 10 min to make the components evenly mixed to obtain an anti-settling system;

3) Preparation of anti-settling absorbing system:

Add 20 kg of absorbing agent (including 1 kg of carbon nanotubes, 8 kg of silicon nitride and 11 kg of barium titanate) and 0.4 kg of adhesion promoter DOW CORNING 2-6032 to the anti-settling system prepared in step 2). 200r/min machine The mixture was stirred for 10 minutes, and the components were uniformly mixed to obtain an anti-settling absorbing system;

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Add 20 kg of far-infrared powder (including 8 kg of silicon carbide, 5 kg of iron oxide and 7 kg of zinc oxide) and 0.3 kg of dispersing aid BYK-301,500r/min to the anti-settling absorbing system prepared in step 3) After stirring for 15 min, the final product-hydrophilic anti-settling far-infrared absorber is obtained.

Example 9

A hydrophilic anti-settling far-infrared absorbing material and a preparation method thereof, the composition of the coating is: a binder of 50 kg, a absorbing agent of 20 kg, a far-infrared powder of 20 kg, and an anti-settling agent of 8.5 kg. The additive is 1.5 kg.

The preparation method is as follows:

1) Preparation of dispersant-binder mixing system:

2) Preparation of anti-settling system:

Add 6.5 kg of hydrophilic fumed silica A200, 2 kg of fumed alumina and 0.3 kg of defoamer high-efficiency defoamer JN-5 to the mixing system prepared in step 1), mechanically stir for 5 min at 100 r/min, 500 r /min mechanically stirred for 10 min to make the components evenly mixed to obtain an anti-settling system;

3) Preparation of anti-settling absorbing system:

Add 20 kg of absorbing agent silicon nitride and 0.4 kg of adhesion promoter DOW CORNING 2-6032 to the anti-settling system prepared in step 2), and mechanically stir for 10 min at 200 r/min to make the components evenly mixed. Settling absorbing system;

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Example 10

The preparation method is as follows:

1) Preparation of dispersant-binder mixing system:

2) Preparation of anti-settling system:

3) Preparation of anti-settling absorbing system:

Add 20 kg of the absorbing agent barium titanate and 0.4 kg of adhesion promoter DOW CORNING 2-6032 to the anti-settling system prepared in step 2), mechanically stir for 10 min at 200 r/min, and mix the components uniformly to obtain the anti-sedimentation system. Settling absorbing system;

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Example 11

The preparation method is as follows:

1) Preparation of dispersant-binder mixing system:

2) Preparation of anti-settling system:

3) Preparation of anti-settling absorbing system:

Add 8 kg of absorbing agent (including 0.2 kg of carbon nanotubes, 3 kg of silicon nitride and 4.8 kg of barium titanate) and 0.4 kg of adhesion promoter DOW CORNING 2-6032, 200r to the mixing system prepared in step 2). /min mechanical stirring for 10min, so that the components are uniformly mixed to obtain an anti-settling absorbing system;

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Add 10 kg of far-infrared powder (3 kg of silicon carbide, 2 kg of magnesia, 3 kg of iron oxide, 2 kg of alumina) and 0.2 kg of dispersing aid BYK-301 to the anti-settling absorbing system prepared in step 3). 500 r / min mechanical stirring for 15 min, you can get the final product - hydrophilic anti-settling far infrared absorbing material.

Example 12

On the basis of Example 10, the silica sol was adjusted to 9 kg, and the fumed alumina was adjusted to 3 kg, and the rest were the same as in Example 10.

Comparative Example 1

A hydrophilic anti-settling far-infrared absorbing material and a preparation method thereof, the composition of the coating is: binder is 74.6 kg, absorbing agent is 4 kg, far-infrared powder is 5 kg, anti-settling agent is 15 kg. The additive is 1.4 kg.

The preparation method is as follows:

1) Preparation of dispersant-binder mixing system:

Mixing 74.6 kg of binder (including 15 kg of silica sol, 15 kg of aluminum sol, 6.6 kg of lithium silicate solution, 20 kg of sodium silicate solution and 18 kg of potassium silicate solution) with 0.5 kg of dispersing aid SER-AD FA607 , 300r / min mechanical stirring until the dispersing agent is completely dissolved, the system is uniform, and a dispersant-binder mixing system is obtained;

2) Preparation of anti-settling system:

Add 11 kg of hydrophilic fumed silica A200, 4 kg of fumed alumina and 0.3 kg of antifoaming agent antifoaming agent JN-5, 100r/min to the dispersant-binder mixing system prepared in step 1) After mechanical stirring for 5 min, 500 r / min mechanical stirring for 10 min to make the components evenly mixed to obtain an anti-settling system;

3) Preparation of anti-settling absorbing system:

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Add 5 kg of far-infrared powder (including 1 kg of silicon carbide, 2 kg of iron oxide and 2 kg of zinc oxide) and 0.2 kg of dispersing aid SER-AD FA607, 500r/min to the anti-settling absorbing system prepared in step 3) Mechanical stirring At 15 min, the final product, the hydrophilic anti-settling far-infrared absorbing material, can be obtained.

Comparative Example 2

A hydrophilic anti-settling far-infrared absorbing material and a preparation method thereof, the composition of the coating is: binder is 74.6 kg, absorbing agent is 4 kg, far infrared powder is 8 kg, anti-settling agent is 12 kg. The additive is 1.4 kg.

The preparation method is as follows:

1) Preparation of dispersant-binder mixing system:

2) Preparation of anti-settling system:

Add 8 kg of hydrophilic fumed silica A200, 4 kg of fumed alumina and 0.3 kg of defoamer high-efficiency defoamer JN-5, 100r/min to the dispersant-binder mixing system prepared in step 1) After mechanical stirring for 5 min, 500 r / min mechanical stirring for 10 min to make the components evenly mixed to obtain an anti-settling system;

3) Preparation of anti-settling absorbing system:

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Add 5 kg of far-infrared powder (including 4 kg of silicon carbide, 2 kg of iron oxide and 2 kg of zinc oxide) and 0.2 kg of dispersing aid SER-AD FA607, 500r/min to the anti-settling absorbing system prepared in step 3) The final product, the hydrophilic anti-settling far-infrared absorbing material, can be obtained by mechanical stirring for 15 min.

Comparative Example 3

A hydrophilic anti-settling far-infrared absorbing material and a preparation method thereof, the composition of the coating is: binder is 69.6 kg, absorbing agent is 4 kg, far-infrared powder is 22 kg, anti-settling agent is 3 kg The additive is 1.4 kg.

The preparation method is as follows:

1) Preparation of dispersant-binder mixing system:

Mixing 69.6 kg of binder (including 15 kg of silica sol, 15 kg of aluminum sol, 6.6 kg of lithium silicate solution, 20 kg of sodium silicate solution and 13 kg of potassium silicate solution) with 0.5 kg of dispersing aid SER-AD FA607 , 300r/min mechanical stirring until the dispersing agent is completely dissolved and the system is uniform, and a dispersant-binder mixing system is obtained;

2) Preparation of anti-settling system:

Add 2 kg of hydrophilic fumed silica A200, 1 kg of fumed alumina and 0.3 kg of antifoaming agent antifoaming agent JN-5, 100r/min to the dispersant-binder mixing system prepared in step 1) After mechanical stirring for 5 min, 500 r / min mechanical stirring for 10 min to make the components evenly mixed to obtain an anti-settling system;

3) Preparation of anti-settling absorbing system:

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Adding 22 kg of far-infrared powder (including 8 kg of silicon carbide, 5 kg of iron oxide and 9 kg of zinc oxide) and 0.2 kg of dispersing aid SER-AD FA607, 500r/min to the anti-settling absorbing system prepared in step 3) The final product, the hydrophilic anti-settling far-infrared absorbing material, can be obtained by mechanical stirring for 15 min.

Comparative Example 4

A hydrophilic anti-settling far-infrared absorbing material and a preparation method thereof, the composition of the coating is: binder is 68.6 kg, absorbing agent is 4 kg, far-infrared powder is 24 kg, anti-settling agent is 2 kg The additive is 1.4 kg.

The preparation method is as follows:

1) Preparation of dispersant-binder mixing system:

Mix 68.6 kg of binder (including 15 kg of silica sol, 15 kg of aluminum sol, 6.6 kg of lithium silicate solution, 20 kg of sodium silicate solution and 12 kg of potassium silicate solution) with 0.5 kg of dispersing aid SER-AD FA607 , 300r / min mechanical stirring until the dispersing agent is completely dissolved, the system is uniform, and a dispersant-binder mixing system is obtained;

2) Preparation of anti-settling system:

Add 1 kg of hydrophilic fumed silica A200, 1 kg of fumed alumina and 0.3 kg of defoamer high-efficiency defoamer JN-5, 100r/min to the dispersant-binder mixing system prepared in step 1) After mechanical stirring for 5 min, 500 r / min mechanical stirring for 10 min to make the components evenly mixed to obtain an anti-settling system;

3) Preparation of anti-settling absorbing system:

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

Adding 24 kg of far-infrared powder (including 8 kg of silicon carbide, 5 kg of iron oxide and 11 kg of zinc oxide) and 0.2 kg of dispersing aid SER-AD FA607, 500r/min to the anti-settling absorbing system prepared in step 3) The final product, the hydrophilic anti-settling far-infrared absorbing material, can be obtained by mechanical stirring for 15 min.

The materials of the above respective examples and comparative examples were sprayed on the surface of the substrate of the baking sheet, and then solidified to form a coating.

The thickness of the coating of the baking sheets prepared in Examples 1 to 11 was 50 μm.

The thickness of the coating of the baking sheets prepared in Comparative Example 1 to Comparative Example 4 was 50 μm.

The following baking sheets and the conventional resin absorbing material baking sheets (the thickness of the resin absorbing material were 2 mm) were subjected to the following performance tests.

Test Data

1. Microwave performance is characterized by the highest temperature of the baking pan at the same time (2 minutes), the same material and size baking tray, and the same microwave oven 100% firepower (the coating thickness of each embodiment and each comparative example is 50 μm, existing The resin absorbing material has a thickness of 2 mm). The experimental results are shown in Table 1.

2. Easy to clean performance: use soy sauce (raw soy): vinegar: sugar: edible salt: edible oil = 3:1:1:1:2 ratio is evenly mixed, take 50ml drop to the surface of the sample to be tested, oven 220 ° C Bake for 20 minutes. After cooling, wipe the surface of the sample with a 10N wet scouring pad to make the surface free of stains. The experimental results are shown in Table 1.

3. Water contact angle test

Water contact angles were measured for each of the examples and the comparative examples by a water contact angle tester. The experimental results are shown in Table 1.

The contact angle refers to the angle θ between the tangential line of the gas-liquid interface made at the intersection of gas, liquid and solid three-phase, and the solid-liquid boundary line, which is a measure of the degree of wetting. If θ<90°, the solid surface is hydrophilic, that is, the liquid is relatively easy to wet the solid, and the smaller the contact angle, the better the hydrophilic property; if θ>90°, the solid surface is hydrophobic. That is, the liquid does not easily wet the solid and easily moves on the surface.

4. Coating settling and thixotropic properties: Put the equal quality paint into the beaker of the same specification, place it at room temperature for 48h, observe whether the paint has delamination, and then mechanically stir it at 200r/min to observe whether the paint has shear thinning performance. No delamination and thixotropic properties are excellent, no delamination but no thixotropic properties, and delamination is poor. The experimental results are shown in Table 1.

5. Baking effect: The same toast (size, shape, manufacturing method, etc.) was placed in the same baking utensils, respectively placed in a prior art enamel oven and baked separately with each of the examples and comparative examples. In the far-infrared enamel oven of the tray (the prior art enamel oven is different from the far-infrared enamel oven, except for the baking tray. Same), set the same baking time (3 min), bake the toast, and after 3 min, determine the color uniformity and color area of the toast surface. The experimental results are shown in Table 1.

Table 1 test data

According to the results in Table 1, it can be seen that the present invention uses components such as a binder, a absorbing agent, a solvent, an anti-settling agent, a far-infrared powder, and an auxiliary agent as compared with the existing resin absorbing material baking sheet. After mixing, it has the advantages of thin coating, good microwave performance, good hydrophilic property, good anti-settling performance, good baking effect and easy cleaning effect. The ratios of Examples 1 to 11 are all in the range of 49 to 83.2 parts of binder, 1 to 20 parts of absorbing agent, and 10 to 10 parts of far-infrared powder. 20 parts, 5 to 10 parts of anti-settling agent, 0.8 to 1.5 parts of auxiliary agent, compared with the respective comparative examples, microwave performance, hydrophilic property, anti-settling property, baking can be further improved by setting a reasonable ratio range The effect and the easy-cleaning effect, etc. Comparative Example 1 and Comparative Example 2 were less desirable because the far-infrared powder added was less and the anti-settling agent was more, and the comparative example 3 and the comparative example 4 were added. There are many far-infrared powders, and it has been found in the research that the coloring effect is not further improved, and the adhesion of the prepared coating is lowered and the cost of the material is increased. In summary, "the binder is 49-83.2 parts, The value range of 1 to 20 parts of the absorbing agent, 10 to 20 parts of the far-infrared powder, 5 to 10 parts of the anti-settling agent, and 0.8 to 1.5 parts of the auxiliary agent is suitable.

The results of the test of Example 12 are similar to those of Example 10, and the specific values are not listed.

The invention adopts one or two kinds of mixing of silica sol and aluminum sol and a mixture of silicate solution (sodium silicate solution, potassium silicate solution and lithium silicate solution) as a binder, so that the material has good bonding property. The material has high temperature resistance which is not easily decomposed by high temperature; one or more of carbon nanotubes, silicon nitride and barium titanate are mixed and used as absorbing materials in different proportions, and the main function can be in appropriate auxiliaries. a material that is well dispersed in a binder and efficiently absorbs microwave energy in a microwave environment; and a mixture of two or more of silicon carbide, iron oxide, magnesium oxide, zinc oxide, and aluminum oxide is used as a far-infrared powder. The main function is that the far-infrared rays emitted have strong penetrating ability and can penetrate food deeper. The hydrophilic fumed silica and fumed alumina are used as anti-settling agents, which can increase the consistency of the whole coating system and the suspension of the filler. The performance makes the coating thixotropic, prevents the sedimentation of the filler, and can further improve the hydrophilic properties of the material; the use of additives can make the components of the materials very good Receiving mixed, and the resulting coating adhered well to the substrate and so on.

On the basis of Example 1, the inventors selected aluminum sol and silicate as one binder when selected from one type, and other similar results to Example 1, and similar results were obtained.

The invention adopts hydrophilic fumed silica, vapor phase alumina with appropriate amount of dispersing aid, and other components to make absorbing coating, so that the coating has excellent anti-settling property and uniformity; and solves the dispersion of absorbing agent Uneven and easy to settle, it will lead to a large difference in microwave absorbing properties of batch products of the same specification type, and even a problem of local overheating and melting due to uneven dispersion of absorbing agent.

The invention abandons the preparation method of the organic resin by using a large amount of the traditional baking tray absorbing material, and adopts the hydrophilic property fumed silica and the vapor phase alumina with the high temperature resistant binder and the absorbing agent with excellent absorbing property. The coating can have a good absorbing property, and the thickness is reduced from about 2 mm to about 30 μm in the prior art, which greatly reduces the thickness of the absorbing material, and solves the disadvantage that the absorbing layer of the prior art is too thick; the prior art is avoided. The use of a large amount of a resin material such as silica gel causes a problem that the absorbing layer is too thick.

The invention adds a proper amount of far-infrared material in the absorbing material system, improves the penetrating property to the food, enables the food to absorb energy better inside, realizes the desire of synchronous cooking inside and the surface of the food, and comprehensively improves the absorbing microwave accessory. The cooking effect; solves the problem that the existing coating in the West does not have far infrared performance, and the inside of the food is prone to unfamiliarity.

The absorbing material prepared by the invention can be sprayed on the surface of the workpiece only by simple pretreatment of the substrate, and the thickness of the coating is only about 30 μm. Compared with the conventional absorbing materials, the process difficulty is obviously reduced; the production is solved. The process is complicated and time consuming.

The invention adds the hydrophilic fumed silica and the fumed alumina to the absorbing material system, can not only solve the problem that the absorbing agent is easy to settle, but also can increase the hydrophilic property of the material, and realize the rapid and thorough cleaning of the oil stain. The invention solves the problem that the prior absorbing material technology does not have hydrophilic property, and the long-term use is easy to cause oily adhesion.

In addition to the specific names of the binders described in the present invention, other materials having high temperature resistance and hydrophilic properties can achieve similar properties within the scope of the present invention.

In addition to the specific names of the absorbing materials described in the present invention, other materials having high absorbing properties that can achieve similar properties are also within the scope of the present invention.

In addition to the far-infrared powders described herein, other materials having good far-infrared radiation properties that achieve similar performance are also within the scope of the present invention.

In addition to the hydrophilic fumed silica and the fumed alumina model described in the present invention, other hydrophilic fumed silica materials and fumed alumina can achieve similar properties, and are also within the scope of the present invention. .

In addition to the auxiliaries described in the present invention, other auxiliaries which can achieve dispersion, defoaming, and adhesion enhancement can achieve similar properties, and are also within the scope of the present invention.

The adjustment of the preparation process steps and the stirring speed of the present invention can also achieve similar performance, and is also within the scope of the present invention.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

The invention relates to a hydrophilic anti-settling far-infrared absorbing material, which comprises the following components by weight: 49-83.2 parts of binder, 1-20 parts of absorbing agent, 10-20 parts of far-infrared powder, anti-settling 5 to 10 parts of the agent, 0.8 to 1.5 parts of the auxiliary agent.
A hydrophilic anti-settling far infrared absorbing material according to claim 1, wherein the binder is a mixed solution of a sol and a silicate solution.
A hydrophilic anti-settling far-infrared absorbing material according to claim 2, wherein the sol is selected from one or a mixture of a silica sol and an aluminum sol.
The hydrophilic anti-settling far-infrared absorbing material according to claim 3, wherein the content of the effective substance in the silica sol is 20% to 40%; and the content of the effective substance in the aluminum sol is 20 %~40%.
The hydrophilic anti-settling far-infrared absorbing material according to claim 2, wherein the silicate solution is selected from the group consisting of sodium silicate solution, potassium silicate solution, and lithium silicate solution. A mixture of several.
A hydrophilic anti-settling far-infrared absorbing material according to claim 2, wherein the silicate solution has a mass fraction of silicate of 20% to 30%.
The hydrophilic anti-settling far-infrared absorbing material according to any one of claims 1 to 6, wherein the absorbing agent is selected from the group consisting of carbon nanotubes, silicon nitride, and barium titanate. Or several.
The hydrophilic anti-settling far-infrared absorbing material according to any one of claims 1 to 6, wherein the anti-settling agent comprises hydrophilic fumed silica and/or fumed alumina.
The hydrophilic anti-settling far-infrared absorbing material according to any one of claims 1 to 6, wherein the far-infrared powder is selected from the group consisting of silicon carbide, iron oxide, magnesium oxide, zinc oxide and aluminum oxide. Mix more than two.
The hydrophilic anti-settling far-infrared absorbing material according to any one of claims 1 to 6, wherein the auxiliary agent is one or more selected from the group consisting of a dispersing agent, an adhesion promoter and an antifoaming agent. Kind.
A method for preparing a hydrophilic anti-settling far-infrared absorbing material, comprising the steps of: mixing the components together according to the ratio of any one of claims 1 to 10.
The method for preparing a hydrophilic anti-settling far-infrared absorbing material according to claim 11, wherein the auxiliary agent comprises a dispersing agent, an adhesion promoter and an antifoaming agent, and comprises the following steps:

1) Preparation of dispersant-binder mixing system:

Mixing the proportion of the binder with a part of the dispersing aid according to the mixing ratio, and mixing to obtain a dispersant-binder mixing system;

2) Preparation of anti-settling system:

Adding a proportion of the anti-settling agent and the antifoaming agent to the dispersant-binder mixing system prepared in the step 1), and mixing, Producing an anti-settling system;

3) Preparation of anti-settling absorbing system:

Adding the absorbing agent and the adhesion promoter to the anti-settling system prepared in the step 2), and mixing, to obtain an anti-settling absorbing system;

4) Preparation of hydrophilic anti-settling far-infrared absorbing materials:

The anti-settling absorbing system prepared in the step 3) is added with a far-infrared powder and a residual dispersing agent, and mixed to obtain a hydrophilic anti-settling far-infrared absorbing material.
A kitchen electric product comprising a substrate and a coating disposed on a surface of the substrate, wherein the coating is made of the hydrophilic anti-settling far infrared absorbing material according to any one of claims 1 to 10. to make.
A method for preparing a kitchen electric product, characterized in that the hydrophilic anti-settling far-infrared absorbing material according to any one of claims 1 to 10 is sprayed on a surface of a substrate of a kitchen electric product, and then solidified. The hydrophobic oleophobic absorbing material is formed into a coating.