A solid defoaming agent suitable for ceramic glazing and preparation method thereof

Abstract

The invention discloses a solid defoamer suitable for ceramic glazing and a preparation method thereof. The solid defoamer comprises the following formula: 10-30 parts of rhamnose, 0.0001-0.05 parts of a DMC bimetallic catalyst, 5-20 parts of polyoxyethylene, 5-40 parts of polyoxypropylene, 0.1-2.5 parts of a hydrogen capping agent, 5-20 parts of polydimethylsiloxane, 5-20 parts of carborane, 1-5 parts of n-butyllithium, 0.0001-0.009 parts of cis-dichlorodiammineplatinum, 3-8 parts of methyldichlorosilane, 0.0001-0.01 parts of ferric chloride, 0.8-4 parts of ammonium chloride, 10-30 parts of bovine bone ash, 6-20 parts of fumed silica, 0.001-3.5 parts of light calcium carbonate, 0.8-3.0 parts of phenoxyethanol, 0.001-0.2 parts of iodopropynyl n-butylcarbamate, and 20-40 parts of water. The present invention utilizes carborane to enhance ceramic properties while avoiding the problem of residue disposal. The dispersion of silicon dioxide and light calcium carbonate ensures uniform dispersion and stable ceramic components. The use of cattle bone ash as a dispersant ensures uniform dispersion and a moist ceramic surface.

Description

Technical Field

[0001] The invention relates to the technical field of fine chemicals, in particular to a solid defoaming agent suitable for ceramic glazing and a preparation method thereof. Background Art

[0002] Defoamers fall into six main categories: fatty alcohols, mineral oils, polyethers, polyether esters, silicones, and polyether-modified silicones. While polyethers and silicones offer significant integration, the other categories exhibit limited cross-fertilization and are limited in scope. This translates to a complex procurement process for clients, resulting in complex inventory management. For manufacturers, this leads to a large number of stock-keeping units (SKUs), making management difficult and leading to significant capital backlogs. Furthermore, the products' operating conditions are relatively limited, typically between -5°C and 45°C. At higher temperatures, polyether defoamers decompose the epoxides they contain, which not only affects their defoaming effectiveness but also poses environmental risks. In particular, ethylene oxide polymerizes with its end-capping agent to form dioxane, which is difficult to degrade naturally. Dioxane is highly toxic, not only carcinogenic but also reproductive and genotoxic, posing a direct threat to the health and well-being of future generations. If polyether polyols are not end-capped, they can suffer functional drawbacks, such as prolonged defoaming times and poor adaptability. Higher alcohol and silicone defoamers are generally emulsion-based, thermodynamically unstable systems that demulsify and stratify at elevated temperatures, significantly reducing defoaming effectiveness. These products also face environmental contamination from low-boiling substances during manufacturing.

[0003] After extensive searching, the prior art was found: Publication No. CN113368543A discloses a silicone polyether emulsion defoamer and its preparation method and application, belonging to the field of microbial fermentation aids. Its raw materials include polysiloxane, polyether, thickener, dispersant, sodium lauryl sulfate, and deionized water, which are prepared into an aqueous phase and an oil phase respectively and then mixed. The present invention also provides the application of the above-mentioned silicone polyether emulsion defoamer in microbial fermentation. The present invention can achieve a synergistic effect by mixing polyether and polysiloxane, and can be emulsified without adding an emulsifier. Under the premise of avoiding the defoamer being affected by the emulsifier, the cost is saved. The prepared defoamer has good defoaming and anti-foaming properties, and is resistant to a certain degree of high temperature, avoiding the defoamer deterioration caused by heat release during the fermentation process. The preparation method is simple, the conditions are mild, and it is obtained by mixing the aqueous phase and the oil phase and emulsifying, which is suitable for large-scale industrial production.

[0004] In summary, during the later use of existing defoamer products, some of their ingredients, such as ordinary polymer thickeners and preservatives, will remain in the dispersion system in a free state and enter the water system as the dispersion system transfers. Polymer thickeners, like plastic products, are difficult to degrade, and preservatives will also pollute water and soil. Summary of the Invention

[0005] The object of the present invention is to provide a solid defoaming agent suitable for ceramic glazing and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a solid defoamer suitable for ceramic glazing and a preparation method thereof, wherein the solid defoamer comprises: 10-30 parts of rhamnose, 0.0001-0.05 parts of a DMC bimetallic catalyst, 5-20 parts of polyoxyethylene, 5-40 parts of polyoxypropylene, 0.1-2.5 parts of a hydrogen capping agent, 5-20 parts of polydimethylsiloxane, 5-20 parts of carborane, 10-20 parts of n-butyl lithium. -5 parts, cis-dichlorodiammineplatinum 0.0001-0.009 parts, methyldichlorosilane 3-8 parts, ferric chloride 0.0001-0.01 parts, ammonium chloride 0.8-4 parts, cattle bone ash 10-30 parts, fumed silica 6-20 parts, light calcium carbonate 0.001-3.5 parts, phenoxyethanol 0.8-3.0 parts, iodopropynyl n-butylamine formate 0.001-0.2 parts, and water 20-40 parts.

[0007] Preferably, the preparation method is as follows:

[0008] S1: Bio-based polyether polyols were prepared using rhamnose as the starting agent under the action of DMC bimetallic catalyst;

[0009] S2: Hydrogen-capping agent is used to cap polydimethylsiloxane to obtain hydrogen-containing silicone oil;

[0010] S3: Reusing carborane as a basis to prepare carborane polyester polyol;

[0011] S4: Using cis-dichlorodiammineplatinum as a catalyst, carborane polyester polyol and bio-based polyether polyol are grafted and modified with hydrogenated silicone oil to obtain high-temperature resistant carborane polyester-modified silicone oil and polyether-modified silicone oil, which are used together as active substances;

[0012] S5: Using cattle bone ash, fumed silica and light calcium carbonate as a dispersion system, add the active ingredient thereto and stir and mix until evenly mixed;

[0013] S6: Use high-temperature resistant phenoxyethanol and iodine propynyl n-butylamine formate as preservatives to reduce the impact of high temperatures during subsequent drying on the shelf life of the product.

[0014] Preferably, the hydrogen capping agent uses sulfuric acid as a hydrogen donor, which is combined with polydimethylsiloxane for capping to obtain hydrogen-containing silicone oil.

[0015] Preferably, the polyoxyethylene and polyoxypropylene are used as polymerization monomers, and are used in combination with polydimethylsiloxane, carborane and n-butyllithium, wherein polydimethylsiloxane and carborane serve as active ingredients, and n-butyllithium serves as a modified monomer.

[0016] Preferably, the methyldichlorosilane is used as a modified monomer and as an electrophilic reagent in conjunction with the preparation process.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The use of carborane can enhance the performance of ceramics and avoid the problem of having to dispose of residues. The dispersion of silicon dioxide and light calcium carbonate ensures uniform dispersion and stable ceramic components.

[0019] 2. The active ingredients prepared by modifying bio-based polyether can achieve rapid degradation;

[0020] 3. Using cow bone ash as a dispersant not only ensures uniform dispersion but also achieves a warm and moist surface on the ceramic;

[0021] 4. Boron is added to the modification of polyether and silicone oil to ensure the applicability of the product under extreme conditions. The amount of VOC generated during the production process is low. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] The present invention provides two embodiments:

[0024] Example 1:

[0025] A solid defoamer suitable for ceramic glazing and a preparation method thereof. The solid defoamer comprises: 10-30 parts of rhamnose, 0.0001-0.05 parts of a DMC bimetallic catalyst, 5-20 parts of polyoxyethylene, 5-40 parts of polyoxypropylene, 0.1-2.5 parts of a hydrogen capping agent, 5-20 parts of polydimethylsiloxane, 5-20 parts of carborane, 1-5 parts of n-butyllithium, 0.0001-0.009 parts of cis-dichlorodiammineplatinum, 3-8 parts of methyldichlorosilane, 0.0001-0.01 parts of ferric chloride, 0.8-4 parts of ammonium chloride, 10-30 parts of bovine bone ash, 6-20 parts of fumed silica, 0.001-3.5 parts of light calcium carbonate, 0.8-3.0 parts of phenoxyethanol, 0.001-0.2 parts of iodopropynyl n-butylamine formate, and 20-40 parts of water.

[0026] The hydrogen capping agent uses sulfuric acid as a hydrogen donor, and is combined with polydimethylsiloxane for capping to obtain hydrogen-containing silicone oil.

[0027] Polyoxyethylene and polyoxypropylene are used as polymerization monomers, and are used in conjunction with polydimethylsiloxane, carborane and n-butyl lithium. Polydimethylsiloxane and carborane are used as active ingredients, and n-butyl lithium is used as a modified monomer. Methyldichlorosilane is used as a modified monomer and as an electrophilic reagent in the preparation process.

[0028] Example 2:

[0029] The preparation method is as follows:

[0030] S1: Bio-based polyether polyols were prepared using rhamnose as the starting agent under the action of DMC bimetallic catalyst;

[0031] S2: Hydrogen-capping agent is used to cap polydimethylsiloxane to obtain hydrogen-containing silicone oil;

[0032] S3: Carborane is then used as a base to prepare carborane polyester polyol. Carborane enhances ceramic performance while avoiding the need for waste disposal. The dispersion of silicon dioxide and light calcium carbonate ensures uniform dispersion and stable ceramic composition.

[0033] S4: Using cis-diaminedichloroplatinum as a catalyst, hydrogenated silicone oil was used to graft-modify carborane polyester polyol and bio-based polyether polyol, respectively, to produce high-temperature resistant carborane polyester-modified silicone oil and polyether-modified silicone oil, which were used together as active ingredients. Boron was added to the polyether and silicone oil modifications to ensure the product's suitability under extreme conditions. The production process generates low levels of VOCs.

[0034] S5: Use cow bone ash, fumed silica and light calcium carbonate as the dispersion system, add the active material into it and stir and mix evenly; use cow bone ash as a raw material of "bone porcelain" as a dispersant, which not only ensures uniform dispersion, but also achieves a warm ceramic surface.

[0035] S6: Use high-temperature resistant phenoxyethanol and iodine propynyl n-butylamine formate as preservatives to reduce the impact of high temperatures during subsequent drying on the shelf life of the product.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. A solid defoamer suitable for ceramic glazing, characterized by: The solid defoaming agent formula is: 10-30 parts of rhamnose, 0.0001-0.05 parts of DMC bimetallic catalyst, 5-20 parts of polyoxyethylene, 5-40 parts of polyoxypropylene, 0.1-2.5 parts of hydrogen capping agent, 5-20 parts of polydimethylsiloxane, 5-20 parts of carborane, 1-5 parts of n-butyl lithium, 0.0001-0.009 parts of cis-dichlorodiammineplatinum, 3-8 parts of methyldichlorosilane, 0.0001-0.01 parts of ferric chloride, 0.8-4 parts of ammonium chloride, 10-30 parts of cattle bone ash, 6-20 parts of fumed silica, 0.001-3.5 parts of light calcium carbonate, 0.8-3.0 parts of phenoxyethanol, 0.001-0.2 parts of iodine propargyl n-butylamine formate, and 20-40 parts of water.

2. A solid defoamer suitable for ceramic glazing according to claim 1, characterized in that: The hydrogen capping agent uses sulfuric acid as a hydrogen donor and is combined with polydimethylsiloxane for capping to obtain hydrogen-containing silicone oil.

3. The solid defoaming agent suitable for ceramic glazing according to claim 1, characterized in that: The methyldichlorosilane is used as a modified monomer and as an electrophilic reagent in conjunction with the preparation process.

4. A method for preparing a solid defoaming agent suitable for ceramic glazing according to any one of claims 1 to 3, characterized in that: The preparation method is as follows: S1: Bio-based polyether polyols were prepared using rhamnose as the starting agent under the action of DMC bimetallic catalyst; S2: Hydrogen-capping agent is used to cap polydimethylsiloxane to obtain hydrogen-containing silicone oil; S3: Reusing carborane as a basis to prepare carborane polyester polyol; S4: Using cis-dichlorodiammineplatinum as a catalyst, carborane polyester polyol and bio-based polyether polyol are grafted and modified with hydrogenated silicone oil to obtain high-temperature resistant carborane polyester-modified silicone oil and polyether-modified silicone oil, which are used together as active substances; S5: Using cattle bone ash, fumed silica and light calcium carbonate as a dispersion system, add the active ingredient thereto and stir and mix until evenly mixed; S6: Use high-temperature resistant phenoxyethanol and iodine propynyl n-butylamine formate as preservatives to reduce the impact of high temperatures during subsequent drying on the shelf life of the product.

5. The method for preparing a solid defoaming agent suitable for ceramic glazing according to claim 4, characterized in that: The polyoxyethylene and polyoxypropylene are used as polymerization monomers and are used in combination with polydimethylsiloxane, carborane and n-butyllithium, wherein the polydimethylsiloxane and carborane are used as active ingredients and n-butyllithium is used as a modified monomer.