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  • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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  • C08K3/34—Silicon-containing compounds
  • C08K3/36—Silica
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  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
  • C08K5/41—Compounds containing sulfur bound to oxygen
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  • C08K7/00—Use of ingredients characterised by shape
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  • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
  • C09D183/04—Polysiloxanes
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  • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
  • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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  • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
  • C09D5/18—Fireproof paints including high temperature resistant paints
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  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
  • C09D7/40—Additives
  • C09D7/60—Additives non-macromolecular
  • C09D7/61—Additives non-macromolecular inorganic
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  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
  • C09D7/40—Additives
  • C09D7/60—Additives non-macromolecular
  • C09D7/63—Additives non-macromolecular organic
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  • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
  • C09D7/40—Additives
  • C09D7/66—Additives characterised by particle size
  • C09D7/67—Particle size smaller than 100 nm
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  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
  • C08K3/20—Oxides; Hydroxides
  • C08K3/22—Oxides; Hydroxides of metals
  • C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
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  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
  • C08K3/20—Oxides; Hydroxides
  • C08K3/22—Oxides; Hydroxides of metals
  • C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
  • C08K2003/2213—Oxides; Hydroxides of metals of rare earth metal of cerium
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  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
  • C08K3/20—Oxides; Hydroxides
  • C08K3/22—Oxides; Hydroxides of metals
  • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
  • C08K3/20—Oxides; Hydroxides
  • C08K3/22—Oxides; Hydroxides of metals
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  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
  • C08K3/20—Oxides; Hydroxides
  • C08K3/22—Oxides; Hydroxides of metals
  • C08K2003/2296—Oxides; Hydroxides of metals of zinc
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  • C08K2201/00—Specific properties of additives
  • C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K

Definitions

• the invention belongs to the technical field of coatings, and in particular relates to a hydrophobic anti-settling absorbing material, a preparation method thereof, a kitchen electric product and a preparation method thereof.
• 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.
• 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.
• the microwave baking tray made by this method has the following disadvantages:
• 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;
• the absorbing materials used in the microwave industry are rarely seen in the use of absorbing coatings, and absorbing materials that have anti-settling type and stable absorbing properties are impossible to find. It is limited to thick-layer absorbers with complicated processes, and it does not have the hydrophobic and oleophobic properties that can not meet the future needs. Thin layer, convenient, and excellent absorbing coatings are the trend!
• the present invention provides a hydrophobic anti-settling absorbing material and a preparation method thereof, which can be used on kitchen appliances, such as microwave ovens, to solve the current absorbing materials for microwave products.
• the absorbing agent is unevenly dispersed and easy to settle, which may cause a large difference in microwave absorbing properties of batch products of the same specification type, and may even cause local overheating and melting due to uneven dispersion of absorbing agent; using a large amount of resin materials such as silica gel, resulting in suction
• the wave layer is too thick; the production process is complicated, time-consuming and material-consuming; it does not have hydrophobic properties, and the use of oil for a long time may cause problems such as adhesion of oil.
• a hydrophobic anti-settling absorbing material comprising the following components by weight: 75-90 parts of binder, 0.5-2 parts of absorbing agent, 5-10 parts of solvent, 1-15 parts of anti-settling agent and 0.5 auxiliary agent ⁇ 1 serving.
• the binder is a material having a good bonding property with the absorbing material and the baking sheet material, and has a temperature resistance property which is not easily decomposed at a high temperature.
• the absorbing agent is a material which can be well dispersed in a binder and efficiently absorbs microwave energy in a microwave environment.
• the solvent is a dissolving aid, a binder, and a uniform distribution of the absorbing agent and the anti-settling agent.
• the auxiliary agent is an agent which can make the components of the components be well compatible and mixed, and the resulting coating adheres well to the substrate.
• 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 hydrophobic 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 solvent is to dissolve the auxiliaries, binders and to evenly distribute the absorbing agent and the anti-settling agent.
• the main function of the anti-settling agent is that it can be uniformly suspended in the coating system, increasing the consistency of the entire coating system and the suspension performance of the filler, and making the coating thicker thixotropic and chemically stable to prevent the sedimentation of the filler.
• the obtained hydrophobic anti-settling absorbing material can have excellent anti-settling property and uniformity, high temperature resistance, and excellent absorbing wave. Performance, thin coating, simple production process and antibacterial function.
• the present invention can also be improved as follows.
• the binder is a hybrid product of a sol and a silicone resin.
• the mass ratio of the sol to the silicone resin is (5-20):1.
• the beneficial effect of adopting the above scheme is that the method of hybridizing the sol and the organic resin is beneficial to ensure the high temperature resistance and the easy cleaning performance of the material, that is, the mixed use of the two can achieve good high temperature resistance and easy cleaning performance.
• the sol is selected from any one or a mixture of any one of a silica sol, an aluminum sol, and a zirconium sol.
• the beneficial effects of adopting the above scheme are: using one or a combination of one or more of silica sol, aluminum sol and zirconium sol, and hybridizing with silicone resin as a binder, the material can have good bonding property, and has high temperature and is difficult to be used. Decomposition of temperature resistance.
• the content of the effective substance in the silica sol is between 20% and 40%; the content of the effective substance in the aluminum sol is between 20% and 40%; and the content of the effective substance in the zirconium sol is 15% to 25%.
• the effective substance in the silica sol refers to silica
• the effective substance in the aluminum sol refers to alumina
• the effective substance in the zirconium sol refers to zirconia. That is, in the silica sol, the mass fraction of silica is between 20% and 40%; in the aluminum sol, the mass fraction of alumina is between 20% and 40%; in the zirconium sol, the mass fraction of zirconia is It is 15% to 25%.
• the proper content is beneficial to control the stable application of the viscosity of the coating. If the content is too low, the viscosity of the coating is too small, which tends to cause poor film forming properties; if the content is too high, the viscosity is too large, which easily leads to flow leveling.
• the absorbing agent is composed of an A component selected from the group consisting of acicular zinc oxide whiskers or/and a thin layer of graphite; and the B raw material is selected from the group consisting of cerium oxide, cerium oxide, and cerium oxide. One or a mixture of several.
• the beneficial effect of adopting the above scheme is that one or two kinds of acicular zinc oxide whiskers and thin layer graphite are added as absorbing materials according to different ratios of one or more of cerium oxide, cerium oxide and cerium oxide.
• the main function can be well dispersed in the binder under the action of appropriate auxiliaries, and the microwave energy material can be efficiently absorbed in the microwave environment.
• the parameter of cerium oxide is less than 30 nm; the parameter of cerium oxide is less than 30 nm; and the parameter of cerium oxide is less than 30 nm.
• the beneficial effect of adopting the above scheme is that a suitable parameter range is beneficial for ensuring the performance of the coating prepared by the material and avoiding the problem of excessive cost, and if the particle size is too small, it is easy to cause high cost and is not suitable for industrial production, etc. If the particle size is too large, the coating may be poorly dispersed, and the appearance of the obtained coating may be unsatisfactory.
• the solvent is selected from any one or a mixture of n-butanol, isobutanol, and isopropanol.
• the beneficial effect of the above scheme is that the use of the above-mentioned solvent can further dissolve the auxiliary agent, the binder and more evenly distribute the absorber and the anti-settling agent.
• the anti-settling agent is a hydrophobic fumed silica.
• the hydrophobic fumed silica is used as an anti-settling agent, which can be uniformly suspended in the coating system, and has the functions of thickening and thixotropic and chemical stability.
• auxiliary agent is selected from any one or a mixture of any one of a dispersing agent, an antifoaming agent, and an adhesion promoter.
• the beneficial effect of the above scheme is that the main function of the auxiliary agent is to make the components of the components be well compatible and mixed, and to make the prepared coating adhere well to the substrate.
• the main function of the dispersant is to improve the dissolution and dispersion properties of the hydrophobic fumed silica 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 play the role of defoaming and foam suppression;
• the main function 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 dispersing agent is selected from a mixture of one or both of sodium lauryl sulfate and cetyltrimethylammonium bromide.
• the invention also provides a preparation method of a hydrophobic anti-settling absorbing material, which is prepared by mixing the components according to the above ratio to obtain a hydrophobic anti-settling absorbing material.
• 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 invention has the simple preparation process and the prepared hydrophobic anti-settling absorbing material It has excellent anti-settling and uniformity, high temperature resistance, excellent absorbing properties, thin coating, simple production process and antibacterial function.
• the auxiliary agent includes a dispersing agent, an antifoaming agent and an adhesion promoter, and when the preparation comprises the following specific steps:
• 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.
• 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 (1 to 2): 1, and the mass ratio of the defoaming agent to the adhesion promoter is (0.5 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 also provides a kitchen appliance product comprising a substrate and a coating disposed on a surface of the substrate, the coating being made of the hydrophobic anti-settling absorber material described above.
• the hydrophobic anti-settling absorbing material of the invention can be used for all kitchen appliances based on microwave performance.
• it can be used in microwave products such as microwave ovens and microwave ovens, and has excellent anti-settling properties and uniformity, high temperature resistance, excellent absorbing properties, thin coating, simple production process and antibacterial function.
• the invention also provides a preparation method of the kitchen electric product, wherein the hydrophobic anti-settling absorbing material is sprayed on the surface of the base material of the kitchen electric product, and then solidified to form a hydrophobic oleophobic absorbing material to form a coating.
• 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 preparation method of the invention is simple, and has the advantages of excellent anti-settling property and uniformity, high temperature resistance, excellent absorbing property, thin coating, simple production process and antibacterial function.
• a hydrophobic anti-settling absorbing material comprising the following components by weight: 75-90 parts of binder, 0.5-2 parts of absorbing agent, 5-10 parts of solvent, 1-15 parts of anti-settling agent and 0.5 auxiliary agent ⁇ 1 serving.
• a hydrophobic anti-settling absorbing material comprises the following components: a binder, a absorbing agent, a solvent, an anti-settling agent and an auxiliary agent; the binder is 75% to 90% by mass percentage, The absorbing agent is 0.5% to 2%, the solvent is 5% to 10%, the anti-settling agent is 1% to 15%, and the auxiliary agent is 0.5% to 1%.
• the binder is a hybrid product of a sol and a silicone resin.
• the mass ratio of the sol to the silicone resin is (5-20):1. With the above ratio, good high temperature resistance and easy cleaning performance can be achieved.
• the sol is selected from any one or a mixture of any one of a silica sol, an aluminum sol, and a zirconium sol.
• the content of the effective substance in the silica sol is between 20% and 40%; the content of the effective substance in the aluminum sol is between 20% and 40%; and the content of the effective substance in the zirconium sol is 15% to 25%.
• the effective substance in the silica sol refers to silica
• the effective substance in the aluminum sol refers to alumina
• the effective substance in the zirconium sol refers to zirconia. That is, in the silica sol, the mass fraction of silica is between 20% and 40%; in the aluminum sol, the mass fraction of alumina is between 20% and 40%; in the zirconium sol, the mass fraction of zirconia is It is 15% to 25%.
• hybrid product of a sol and a silicone resin refers to a product obtained by mixing a sol with a silicone resin.
• Silicone resin is a highly crosslinked network structure of polyorganosiloxane, usually with methyltrichlorosilane, dimethyldichlorosilane, phenyltrichlorosilane, diphenyldichlorosilane or methylbenzene. Various mixtures of chlorodichlorosilanes.
• the silicone resin in the examples was purchased from WACKER.
• the absorbing agent is composed of an A component selected from the group consisting of acicular zinc oxide whiskers or/and a thin layer of graphite; and the B raw material is selected from the group consisting of cerium oxide, cerium oxide, and cerium oxide. Mix of species or several.
• the properties of the material are further improved.
• the parameter of cerium oxide is less than 30 nm; the parameter of cerium oxide is less than 30 nm; and the parameter of cerium oxide is less than 30 nm.
• the solvent is selected from any one or a mixture of n-butanol, isobutanol, and isopropanol.
• the anti-settling agent is a hydrophobic fumed silica.
• hydrophobic fumed silica R972 and hydrophobic fumed silica R974 were purchased from Degussa.
• the adjuvant is selected from any one or a mixture of any of a dispersing agent, an antifoaming agent, and an adhesion promoter.
• the dispersing agent is selected from a mixture of one or both of sodium lauryl sulfate and cetyltrimethylammonium bromide.
• the type of the antifoaming agent was an L-1984 defoaming agent, which was purchased from Nanmu Chemical Company of Japan.
• the adhesion promoter was one of KH-550 and G-407, and both KH-550 and G-407 were purchased from Liaoning Gaizhou Chemical Industry Co., Ltd.
• a method for preparing a hydrophobic anti-settling absorbing material mixing the components according to the above ratio, and preparing a hydrophobic anti-sinking Drop the absorbing material.
• auxiliary agent includes a dispersing agent, an antifoaming agent, and an adhesion promoter
• the solvent, the absorbing agent and the adhesion promoter are added to the mixed system prepared in the step 2), wherein the solvent is added in several portions to obtain a final product, that is, a hydrophobic anti-settling absorbing material.
• the ratio of the dispersing agent, the defoaming agent and the adhesion promoter is: the mass ratio of the dispersing agent to the antifoaming agent is (1 to 2): 1, the mass ratio of the defoaming agent to the adhesion promoter is ( 0.5 ⁇ 2):1, which is beneficial to further improve the performance of the material.
• a kitchen appliance product comprising a substrate and a coating disposed on a surface of the substrate, the coating being made of the hydrophobic anti-settling absorber material described above.
• the above-mentioned hydrophobic anti-settling absorbing material is sprayed on the surface of the substrate of the kitchen electric product, and then solidified to form a coating layer of the hydrophobic oleophobic absorbing material.
• the above-mentioned hydrophobic anti-settling absorbing material is sprayed on the surface of the substrate of the kitchen electric product, and then solidified to form a coating layer of the hydrophobic oleophobic absorbing material.
• operations such as baking.
• the agent is 1 kg.
• the preparation method is as follows:
• binder including 30 kg of silica sol, 30 kg of aluminum sol, 10 kg of zirconium sol and 10 kg of silicone resin
• dispersing aid sodium lauryl sulfate mechanically stirred to disperse at 500 r/min.
• the agent is completely dissolved, The system is uniform, and the first mixed system, that is, the dispersant-binder mixing system, is obtained;
• the content of the effective substance in the silica sol is 20%; the content of the effective substance in the aluminum sol is 20%; and the content of the effective substance in the zirconium sol is 15%.
• a hydrophobic anti-settling absorbing material and a preparation method thereof wherein the components of the coating are 78 kg, the binder is 1.6 kg, the absorbing agent is 1.6 kg, the solvent is 8.5 kg, and the anti-settling agent is 11 kg.
• the additive is 0.9 kg.
• the preparation method is as follows:
• the content of the effective substance in the silica sol is 40%; the content of the effective substance in the aluminum sol is 40%; and the content of the effective substance in the zirconium sol is 25%.
• a hydrophobic anti-settling absorbing material and a preparation method thereof wherein the components of the coating are 75 kg, the binder is 1.2 kg, the absorbing agent is 1.2 kg, the solvent is 10 kg, and the anti-settling agent is 13 kg.
• the additive is 0.8 kg.
• the preparation method is as follows:
• the content of the effective substance in the silica sol is 30%; and the content of the effective substance in the aluminum sol is 30%.
• the additive is 0.6 kg.
• the preparation method is as follows:
• binder including 56 kg of silica sol, 10 kg of aluminum sol, 5 kg of zirconium sol and 12 kg of silicone resin
• dispersing aid sodium lauryl sulfate mechanically stirred to disperse at 500 r/min.
• the agent is completely dissolved and the system is uniform, and the first mixed system, that is, the dispersant-binder mixed system is obtained;
• the second mixed system prepared in the step 2) was charged with 9.6 kg of solvent (including 3 kg of n-butanol and 6.6 kg of isobutanol), 0.8 kg of absorbing agent (including 0.6 kg of thin layer graphite, 0.1 kg of cerium oxide and 0.1 kg).
• the cerium oxide is mechanically stirred with 0.1 kg of adhesion promoter G-407 at 300 r/min for 10 min (the solvent is added in multiple portions during the process) to obtain the final product-hydrophobic anti-settling absorbing material.
• the content of the effective substance in the silica sol is 30%; the content of the effective substance in the aluminum sol is 30%; and the content of the effective substance in the zirconium sol is 20%.
• a hydrophobic anti-settling absorbing material and a preparation method thereof wherein the components of the coating are 86 kg, the binder is 0.5 kg, the absorbing agent is 0.5 kg, the solvent is 9 kg, and the anti-settling agent is 4 kg.
• the additive is 0.5 kg.
• the preparation method is as follows:
• a first mixed system that is, a dispersant-binder mixed system
• solvent is 9 kg of isopropanol
• absorbing agent including 0.2 kg of acicular zinc oxide whisker, 0.25 kg of thin layer graphite and 0.05 kg
• the cerium oxide is mechanically stirred with 0.1 kg of adhesion promoter G-407 at 300 r/min for 10 min (the solvent is added in multiple portions during the process) to obtain the final product-hydrophobic anti-settling absorbing material.
• the content of the effective substance in the silica sol is 30%; and the content of the effective substance in the aluminum sol is 30%.
• a hydrophobic anti-settling absorbing material and a preparation method thereof wherein the components of the coating are 90% by weight, the binder is 0.5 kg, the absorbing agent is 0.5 kg, the solvent is 5 kg, and the anti-settling agent is 4 kg.
• the additive is 0.5 kg.
• the preparation method is as follows:
• the content of the effective substance in the silica sol is 30%; the content of the effective substance in the aluminum sol is 30%; and the content of the effective substance in the zirconium sol is 20%.
• a hydrophobic anti-settling absorbing material and a preparation method thereof wherein the components of the coating are 75 kg, the binder is 0.5 kg, the absorbing agent is 0.5 kg, the solvent is 9 kg, and the anti-settling agent is 15 kg.
• the additive is 0.5 kg.
• the preparation method is as follows:
• the content of the effective substance in the silica sol is 30%; the content of the effective substance in the aluminum sol is 30%; and the content of the effective substance in the zirconium sol is 20%.
• a hydrophobic anti-settling absorbing material and a preparation method thereof wherein each component of the coating is 90 kg of a binder, a absorbing agent of 0.5 kg, a solvent of 8 kg, and an anti-settling agent of 1 kg.
• the additive is 0.5 kg.
• the preparation method is as follows:
• the content of the effective substance in the silica sol is 30%; the content of the effective substance in the aluminum sol is 30%; and the content of the effective substance in the zirconium sol is 20%.
• a hydrophobic anti-settling absorbing material and a preparation method thereof wherein the components of the coating are 78 kg, the binder is 1.6 kg, the absorbing agent is 1.6 kg, the solvent is 8.5 kg, and the anti-settling agent is 11 kg.
• the additive is 0.9 kg.
• the preparation method is as follows:
• the content of the effective substance in the zirconium sol is 20%.
• the additive is 0.5 kg.
• the content of the active substance in the sol was 30%.
• the preparation method is as follows:
• the content of the effective substance in the silica sol is 30%; the content of the effective substance in the aluminum sol is 30%; and the content of the effective substance in the zirconium sol is 20%.
• a hydrophobic anti-settling absorbing material and a preparation method thereof wherein the components of the coating are 74 kg, the binder is 0.3 kg, the absorbing agent is 0.3 kg, the solvent is 9.2 kg, and the anti-settling agent is 16 kg.
• the additive is 0.5 kg.
• the preparation method is as follows:
• the second mixed system prepared in the step 2) was charged with 9.2 kg of a solvent (including 5 kg of isopropanol and 4.2 kg of n-butanol), 0.3 kg of a absorbing agent (including 0.2 kg of acicular zinc oxide whisker, 0.05 kg of cerium oxide). And 0.05 kg of cerium oxide) and 0.1 kg of adhesion promoter KH-550, 300 r / min mechanical stirring for 10 min (the solvent is added in multiple times in the process), the final product - hydrophobic anti-settling absorbing material can be obtained.
• a solvent including 5 kg of isopropanol and 4.2 kg of n-butanol
• a absorbing agent including 0.2 kg of acicular zinc oxide whisker, 0.05 kg of cerium oxide
• adhesion promoter KH-550, 300 r / min mechanical stirring for 10 min (the solvent is added in multiple times in the process), the final product - hydrophobic anti-settling absorbing material can be obtained.
• the content of the effective substance in the silica sol is 30%; the content of the effective substance in the aluminum sol is 30%; and the content of the effective substance in the zirconium sol is 20%.
• a hydrophobic anti-settling absorbing material and a preparation method thereof wherein the components of the coating are 91 kg, the binder is 2.2 kg, the absorbing agent is 2.2 kg, the solvent is 5.5 kg, and the anti-settling agent is 0.8 kg.
• the additive is 0.5 kg.
• the preparation method is as follows:
• the content of the effective substance in the silica sol is 30%; the content of the effective substance in the aluminum sol is 30%; and the content of the effective substance in the zirconium sol is 20%.
• the additive is 0.5 kg.
• the preparation method is as follows:
• the content of the effective substance in the silica sol is 30%; the content of the effective substance in the aluminum sol is 30%; and the content of the effective substance in the zirconium sol is 20%.
• 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 9 was 50 ⁇ m.
• the thickness of the coating of the baking sheets prepared in Comparative Example 1 to Comparative Example 4 was 50 ⁇ m.
• baking sheets and the existing resin absorbing material baking sheets are respectively subjected to the following properties. Can test.
• the microwave performance is characterized by the highest temperature of the baking tray at the same time (2 minutes), the same material and size baking tray, and the same microwave oven with 100% firepower.
• the experimental results of the test are shown in Table 1.
• the contact angle refers to the angle ⁇ 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 ⁇ 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 ⁇ >90°, the solid surface is hydrophobic. That is, the liquid does not easily wet the solid and easily moves on the surface.
• Examples 1-9 are technical solutions in accordance with the scope of the present invention, and it can be seen that the microwave performance is excellent compared with the comparative examples and the existing resin absorbing material baking sheets. , hydrophobic properties and anti-settling properties.
• Examples 1-7 and Example 9 have better anti-settling effect than Example 8, which may be due to the fact that the amount of anti-settling agent in Example 8 is too low, resulting in a slightly lower anti-settling performance than the other examples. However, it is still significantly better than the performance of the existing resin absorbing material baking sheet.
• Comparative Example 1 and Comparative Example 2 although the anti-settling properties were improved, due to the absorbing agent and sticking The amount of the binder is small and the microwave performance is remarkably lowered.
• Comparing Example 3 and Comparative Example 4 although the microwave performance was better than Comparative Example 1 and Comparative Example 2, it was still lower than Examples 1 to 9, and at the same time, due to the small amount of anti-settling agent added, the anti-settling agent was added. The effect of settlement is not ideal.
• the invention adopts a hydrophobic fumed silica with a suitable amount of dispersing aid, and is made into an absorbing coating with other components, so that the coating has excellent anti-settling property and uniformity.
• the invention solves the problem that the absorbing agent is unevenly dispersed and easy to settle, which may cause a large difference in microwave absorbing performance of the batch products of the same specification type, and even a problem of local overheating and melting due to uneven dispersion of the absorbing agent.
• the invention abandons the preparation method of using a large amount of organic resin for the traditional baking tray absorbing material, and adopts the hydrophobic property of the fumed silica combined with the high temperature resistant binder and the absorbing agent having excellent absorbing property, etc., and can be made into a thin coating.
• the coating having good absorbing properties has a thickness reduced from about 2 mm to about 50 ⁇ m in the prior art, which greatly reduces the thickness of the absorbing material, and solves the problem that the absorbing layer of a resin material such as a large amount of silica gel is too thick in the prior art.
• the absorbing material prepared by the invention only needs simple substrate pretreatment, and can be sprayed on the surface of the workpiece, and the coating thickness is only about 50 ⁇ m, and the process difficulty is significantly reduced compared with the conventional absorbing materials. The problem of complicated production process and time-consuming material is solved.
• the invention adds hydrophobic type fumed silica to the absorbing material system, can not only solve the problem that the absorbing agent is easy to settle, and increases the antibacterial function on the basis of not affecting the hydrophobic oleophobic property and the absorbing property, so that the preparation
• the material has suitable antibacterial properties, and also solves the problem that the existing absorbing material technology does not have hydrophobic properties, and the long-term use easily leads to the adhesion of oil stains.
• binders having high temperature resistance and hydrophobic oleophobic properties which can achieve similar properties are also within the scope of the present invention.
• hydrophobic fumed silica materials may also achieve similar properties if they are capable of achieving similar properties.
• auxiliaries described in the present invention are also within the scope of the present invention.

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