Bio-based aqueous polymer foam inhibitor and preparation method thereof

Abstract

The invention provides a bio-based water-based polymer foam inhibitor and a preparation method thereof, and the bio-based water-based polymer foam inhibitor comprises the following raw materials in parts by weight: 5-15 parts of water-based acrylate polymer, 1-2 parts of bio-based hydrophobic particles (polylactic acid or carnauba wax), and the balance of water. 70-90 parts of bio-based quick bubble-breaking effective substances (soybean oil polyol and polycarbonate diol), and 6-10 parts of bio-based emulsifiers (bio-based polyethylene glycol and lecithin). The invention can provide an environment-friendly, efficient and stable foam inhibition solution, is suitable for various industrial fields, and reduces the negative influence on the environment at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of chemically synthesized foam suppressors, and more specifically, to a bio-based waterborne polymer foam suppressor and a preparation method thereof. Background Art

[0002] Foam generation is a common problem in industrial production processes, especially in industries such as textiles, papermaking, detergents and food. Foam not only affects production efficiency, but may also lead to a decline in product quality. Therefore, it is particularly important to use antifoam agents to control the generation and stability of foam. Although traditional antifoam agents have certain effects, they are often based on chemical synthetic materials, which may have adverse effects on the environment, and may have problems such as poor biodegradability and poor compatibility in some applications. In addition, some traditional antifoam agents do not perform well in terms of rapid foam breaking and long-term foam suppression, especially in harsh environments such as high temperature, acid and alkali, their performance will be greatly reduced. In the context of environmental protection and sustainable development, the development of a bio-based antifoam agent that is both efficient and environmentally friendly has become an industry need.

[0003] In the process of implementing the embodiments of the present invention, the inventors found that there are at least the following problems or defects in the prior art: traditional antifoaming agents mostly rely on chemical synthetic materials, which are not only environmentally unfriendly, but also lack performance stability and durability in specific application scenarios. Summary of the invention

[0004] The invention provides a bio-based waterborne polymer antifoaming agent and a preparation method thereof.

[0005] In a first aspect of the present invention, a bio-based waterborne polymer antifoam agent is provided, comprising:

[0006] Aqueous acrylate polymer, 5-15 parts by weight;

[0007] Bio-based hydrophobic particles, 1-2 parts by weight;

[0008] Bio-based rapid foam breaking effective substance, 70-90 parts by weight;

[0009] The bio-based emulsifier is present in an amount of 6 to 10 parts by weight.

[0010] Furthermore, the water-based acrylate polymer is a water-based acrylate polymer with a large molecular weight.

[0011] Furthermore, the bio-based hydrophobic particles are polylactic acid or carnauba wax, and the molecular weight of the polylactic acid ranges from 10,000 to 50,000, and the melting point of the carnauba wax is 80 to 90 degrees Celsius.

[0012] Furthermore, the bio-based fast foam-breaking effective substances are soybean oil polyol and polycarbonate diol, which work synergistically to achieve the function of fast foam breaking, wherein the hydroxyl value of soybean oil polyol is 80 mgKOH / g and the molecular weight is 2500, the hydroxyl value of polycarbonate diol is 120 mgKOH / g, Mn=1000, and the mass ratio of the two is 7:3 to 3:7.

[0013] Furthermore, the bio-based emulsifier is bio-based polyethylene glycol and lecithin, and the compound use of the two helps to improve the compatibility of each component in the system and stabilize the performance of the antifoaming agent, wherein the molecular weight of the bio-based polyethylene glycol ranges from 200 to 600, and the phospholipid content of the lecithin is not less than 80%.

[0014] In a second aspect of the present invention, a method for preparing a bio-based waterborne polymer antifoaming agent is provided, comprising the following steps:

[0015] Step 1: prepare raw materials according to the weight ratio;

[0016] Step 2: Put the water-based acrylic polymer, the bio-based hydrophobic particles and the bio-based emulsifier into a stirring device in sequence, and continue stirring at a speed of 1000 rpm to 2000 rpm for 30 to 60 minutes to fully mix the components;

[0017] Step 3: Add the bio-based rapid foam breaking effective substance and continue stirring at a speed of 500 to 1000 rpm for 30 minutes to obtain a bio-based water-based polymer antifoam agent, wherein the temperature during the stirring process is controlled at 20 to 30 degrees Celsius.

[0018] Furthermore, when the bio-based water-based polymer antifoaming agent is used in the textile, papermaking, detergent and food industries, the addition amount of the antifoaming agent is 0.1 to 1.0%.

[0019] Furthermore, the bio-based waterborne polymer antifoaming agent uses soybean oil polyol and polycarbonate diol as a fast foam-breaking effective substance, and the mass ratio of the two is 7:3 to 3:7.

[0020] Furthermore, the bio-based water-based polymer antifoaming agent uses a bio-based emulsifier compounded with bio-based polyethylene glycol and lecithin, and the mass ratio of bio-based polyethylene glycol to lecithin is 5:4.

[0021] Furthermore, the bio-based water-based polymer antifoam agent uses a bio-based fast-breaking effective substance, bio-based hydrophobic particles and a bio-based emulsifier, and the hydroxyl value of the bio-based fast-breaking effective substance ranges from 80 to 120 mgKOH / g, the particle size of the bio-based hydrophobic particles ranges from 0.1 to 10 microns, and the HLB value of the bio-based emulsifier ranges from 8 to 18.

[0022] According to the above embodiments of the present invention, at least the following beneficial effects are achieved: the bio-based waterborne polymer antifoam agent of the present invention uses bio-based raw materials, which can reduce the impact on the environment and improve the sustainability of the product compared to the traditional chemically synthesized antifoam agent. Since its ingredients are natural and biodegradable, the potential harm to the ecosystem can be reduced. In addition, the antifoam agent of the present invention can achieve the effects of rapid foam breaking and long-lasting foam suppression through a carefully designed component ratio and preparation process, and can maintain high efficiency even in harsh environments such as high temperature, acid and alkali, thereby improving the efficiency of industrial production and product quality.

[0023] The defoamer of the present invention uses bio-based hydrophobic particles, bio-based rapid foam breaking effective substances and bio-based emulsifiers, which can improve the compatibility of each component in the system and make the defoamer performance stable. This stability means that a consistent defoaming effect can be maintained in different application scenarios and conditions, and performance fluctuations caused by environmental changes can be reduced. At the same time, due to its bio-based characteristics, the defoamer has little impact on the environment after use, which helps to promote the green transformation of related industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, in which:

[0025] Figure 1 A schematic flow chart of a method for preparing a bio-based aqueous polymer antifoaming agent provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0026] The principles and spirit of the present invention will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are provided only to enable those skilled in the art to better understand and implement the present invention, and are not intended to limit the scope of the present invention in any way. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0027] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. All features disclosed in this specification, or steps in all methods or processes disclosed, except for mutually exclusive characteristics and / or steps, can be combined in any way, unless otherwise described, and can be replaced by other equivalent or alternative features with similar purposes, that is, unless otherwise described, each feature is only one embodiment in a series of equivalent or similar features.

[0028] In some embodiments, a bio-based waterborne polymer antifoam agent includes the following raw material components in parts by weight:

[0029] Aqueous acrylate polymer, 5-15 parts by weight;

[0030] Bio-based hydrophobic particles, 1-2 parts by weight;

[0031] Bio-based rapid foam breaking effective substance, 70-90 parts by weight;

[0032] The bio-based emulsifier is present in an amount of 6 to 10 parts by weight.

[0033] The invention relates to a bio-based water-based polymer antifoaming agent, which comprises a water-based acrylic polymer, a bio-based hydrophobic particle, a bio-based rapid foam breaking effective substance and a bio-based emulsifier. The water-based acrylic polymer is a high molecular weight polymer with good water solubility and film-forming property, and is used to enhance the stability and antifoaming effect of the antifoaming agent. The bio-based hydrophobic particle provides the hydrophobic property required by the antifoaming agent, and is helpful to destroy the foam structure.

[0034] Specifically, the weight of the water-based acrylic polymer is 5-15 parts, which ensures that the proportion of the polymer in the defoamer is neither too high to increase the cost nor too low to affect the defoaming effect. The weight of the bio-based hydrophobic particles is 1-2 parts, which includes polylactic acid or carnauba wax, where polylactic acid is a biodegradable polymer material with a molecular weight range of 10,000 to 50,000, and carnauba wax is a natural wax with a melting point of 80 to 90 degrees Celsius. They work together in the defoamer to improve its defoaming and defoaming performance.

[0035] Preferably, the bio-based fast foam breaking effective material includes soybean oil polyol and polycarbonate diol, whose hydroxyl values ​​are 80 mgKOH / g and 120 mgKOH / g, respectively, and whose molecular weights are 2500 and Mn=1000, respectively, and whose mass ratio is 7:3 to 3:7. This specific ratio can work synergistically to achieve the function of fast foam breaking.

[0036] More specifically, the bio-based emulsifier is compounded by bio-based polyethylene glycol and lecithin. The molecular weight of the bio-based polyethylene glycol ranges from 200 to 600, and the phospholipid content of the lecithin is not less than 80%. This compound use helps to improve the compatibility of each component in the system and stabilize the performance of the antifoaming agent.

[0037] In some embodiments, the water-based acrylate polymer is a high molecular weight water-based acrylate polymer.

[0038] The waterborne acrylate polymer is a high molecular weight waterborne acrylate polymer, which means that the polymer has a higher molecular weight, which is usually directly related to its performance in the foam suppressor. High molecular weight polymers usually have better stability and durability, and can form a tougher film in the foam suppressor, thereby effectively suppressing the generation of foam. Here, high molecular weight refers to a molecular weight much higher than that of general small molecular compounds, usually in the order of hundreds of thousands to millions.

[0039] Specifically, the molecular weight of waterborne acrylate polymers can be controlled by the conditions of the polymerization reaction, such as the concentration of the monomer, the reaction time, and the type of catalyst. In practical applications, the desired molecular weight can be obtained by adjusting these parameters. For example, by increasing the concentration of the monomer or extending the reaction time, a polymer with a higher molecular weight can be synthesized. In addition, the properties of the polymer, such as hydrophobicity and flexibility, can be adjusted by selecting different acrylate monomers, such as methyl methacrylate, ethyl ethacrylate, etc.

[0040] Preferably, the molecular weight of the waterborne acrylate polymer can be accurately determined by techniques such as gel permeation chromatography (GPC). In actual production, a polymer with a molecular weight within a specific range can be selected according to the specific application requirements of the antifoaming agent. For example, if the antifoaming agent needs to be used in a high temperature environment, a polymer with a higher molecular weight may need to be selected to improve its thermal stability.

[0041] Furthermore, it is also possible to consider compounding polymers of different molecular weights to obtain better overall performance. For example, mixing high molecular weight and low molecular weight polymers in a certain proportion can not only maintain the fluidity of the antifoaming agent, but also improve its performance in specific applications.

[0042] In some embodiments, the bio-based hydrophobic particles are polylactic acid or carnauba wax, and the molecular weight of the polylactic acid is in the range of 10,000 to 50,000, and the melting point of the carnauba wax is in the range of 80 to 90 degrees Celsius.

[0043] This embodiment involves the selection of bio-based hydrophobic particles, specifically polylactic acid or carnauba wax. Polylactic acid is a biodegradable plastic made from renewable resources such as corn starch, while carnauba wax is a natural wax extracted from the leaves of the Brazilian palm tree. Both materials have bio-based sources and play a key hydrophobic role in the foam suppressor, helping to destroy the foam structure and improve the foam suppression efficiency.

[0044] Specifically, the molecular weight of polylactic acid ranges from 10,000 to 50,000, a parameter that determines its physical and chemical properties, such as solubility and mechanical strength. The melting point of carnauba wax is 80 to 90 degrees Celsius, a temperature range that ensures that the wax is solid at room temperature and can be melted and evenly dispersed during processing. When preparing the defoamer, polylactic acid with different molecular weights and carnauba wax with different melting points can be selected according to specific application requirements and process conditions to achieve the best defoaming effect.

[0045] Preferably, polylactic acid can be selected according to its molecular weight and optical purity to meet specific performance requirements. For example, high molecular weight polylactic acid may provide better mechanical properties, while low molecular weight polylactic acid may be easier to process. For carnauba wax, in addition to considering its melting point, its crystallinity and hardness can also be considered, which will affect its dispersibility and stability in the antifoaming agent.

[0046] More specifically, the dispersibility of polylactic acid and carnauba wax in the defoamer can be optimized by controlling the processing temperature and adding additives to ensure their uniform distribution, thereby improving the overall performance of the defoamer. In addition, other types of bio-based hydrophobic particles, such as rice bran wax or beeswax, can also be considered as alternative materials to adapt to different application scenarios and environmental requirements.

[0047] In some embodiments, the bio-based fast foam breaking effective substances are soybean oil polyol and polycarbonate diol, which work synergistically to achieve the function of fast foam breaking, wherein the hydroxyl value of soybean oil polyol is 80 mgKOH / g and the molecular weight is 2500, the hydroxyl value of polycarbonate diol is 120 mgKOH / g, Mn=1000, and the mass ratio of the two is 7:3 to 3:7.

[0048] This embodiment describes in detail the composition of the bio-based fast foam breaking effective material, namely the synergistic effect of soybean oil polyol and polycarbonate diol. Soybean oil polyol is a compound derived from soybean oil and has multiple hydroxyl groups, while polycarbonate diol is a polymer containing carbonate groups. The combination of these two components can achieve the function of fast foam breaking, wherein the hydroxyl value of soybean oil polyol is 80mgKOH / g, and the hydroxyl value of polycarbonate diol is 120mgKOH / g. Hydroxyl value is an indicator of the hydroxyl content in polyols, which is crucial for determining the molecular weight and reactivity of polymers.

[0049] Specifically, the molecular weight of soybean oil polyol is set to 2500, which is a moderate molecular weight that ensures the fluidity of the molecule and provides sufficient surface activity to break the bubble. The number average molecular weight (Mn) of polycarbonate diol is 1000, which indicates the relative molecular size of the polymer. The mass ratio of the two components ranges from 7:3 to 3:7. This ratio range ensures that the two components can work synergistically to achieve the best bubble breaking effect. In practical applications, the ratio of the two components can be adjusted according to the characteristics of the foam and the bubble breaking requirements to optimize the bubble breaking performance.

[0050] Preferably, the mass ratio of soybean oil polyol to polycarbonate diol can be fine-tuned according to specific application scenarios. For example, in industrial processes that require stronger bubble breaking power, the proportion of soybean oil polyol may be increased; while in cases where a more lasting anti-foaming effect is required, the proportion of polycarbonate diol may be increased.

[0051] More specifically, the optimal foam breaking ratio can be determined experimentally, and the addition amount of the two components can be strictly controlled during the production process through precise metering equipment. In addition, other bio-based polyols or polyester diols with similar functions can also be considered as substitutes to adapt to different industrial needs and environmental conditions.

[0052] In some embodiments, the bio-based emulsifier is bio-based polyethylene glycol and lecithin, and the combination of the two helps to improve the compatibility of each component in the system and stabilize the performance of the antifoaming agent, wherein the molecular weight of the bio-based polyethylene glycol ranges from 200 to 600, and the phospholipid content of the lecithin is not less than 80%.

[0053] This embodiment describes the composition of a bio-based emulsifier, including bio-based polyethylene glycol and lecithin. Bio-based polyethylene glycol is a polymer made from renewable resources with good water solubility and emulsification properties; lecithin is a compound naturally present in egg yolk and soybeans, with excellent emulsification and stabilization effects. The combination of these two ingredients helps to improve the compatibility of each component in the system and stabilize the performance of the antifoaming agent.

[0054] Specifically, the molecular weight of bio-based polyethylene glycol ranges from 200 to 600, which ensures that polyethylene glycol has good solubility and emulsification ability in antifoaming agents. The phospholipid content of lecithin is not less than 80%, which means that the proportion of active ingredients in lecithin is higher, which can more effectively promote emulsification and stability. When preparing antifoaming agents, bio-based polyethylene glycol with different molecular weights and lecithin with different phospholipid contents can be selected according to specific application requirements and process conditions to achieve the best emulsification effect.

[0055] Preferably, the mass ratio of bio-based polyethylene glycol to lecithin can be fine-tuned according to specific application scenarios. For example, in industrial processes that require stronger emulsification, the proportion of lecithin may be increased; while in cases where more lasting stability is required, the proportion of bio-based polyethylene glycol may be increased.

[0056] More specifically, the optimal emulsification ratio can be determined experimentally, and the addition amount of the two ingredients can be strictly controlled during the production process through precise metering equipment. In addition, other bio-based emulsifiers with similar functions, such as sucrose esters or citrate esters, can also be considered as alternatives to adapt to different industrial needs and environmental conditions.

[0057] In some embodiments, the preparation method of the bio-based waterborne polymer antifoam agent is as follows: Figure 1 As shown, the following steps are included:

[0058] Step 1: prepare raw materials according to the weight ratio;

[0059] Step 2: Put the water-based acrylic polymer, the bio-based hydrophobic particles and the bio-based emulsifier into a stirring device in sequence, and continue stirring at a speed of 1000 rpm to 2000 rpm for 30 to 60 minutes to fully mix the components;

[0060] Step 3: Add the bio-based rapid foam breaking effective substance and continue stirring at a speed of 500 to 1000 rpm for 30 minutes to obtain a bio-based water-based polymer antifoam agent, wherein the temperature during the stirring process is controlled at 20 to 30 degrees Celsius.

[0061] This embodiment describes in detail a method for preparing a bio-based water-based polymer antifoam agent, which first involves preparing raw materials according to a predetermined weight ratio. This includes accurately weighing components such as water-based acrylic polymer, bio-based hydrophobic particles, and bio-based emulsifiers to ensure that the ratio of each component meets the design requirements. The stirring device is a device used to mix these components, and its rotation speed and stirring time are key parameters affecting the mixing uniformity.

[0062] Specifically, during the preparation process, water-based acrylic polymer, bio-based hydrophobic particles and bio-based emulsifier are first put into the stirring device in sequence. The stirring speed is controlled between 1000rpm and 2000rpm, and the stirring is continued for 30 to 60 minutes to ensure that the components are fully mixed and uniform. This step is the basis of the preparation process and is crucial to the performance of the final product. The temperature during the stirring process is controlled at 20 to 30 degrees Celsius. This temperature range is conducive to the uniform mixing of the components, while avoiding the adverse effects of excessively high temperatures on certain sensitive components.

[0063] Preferably, after the preliminary mixing, the bio-based rapid foam breaking effective substance is added, and the stirring speed is reduced to 500 to 1000 rpm, and the stirring is continued for 30 minutes to obtain the final bio-based waterborne polymer defoamer. In this step, reducing the stirring speed helps to disperse the bio-based rapid foam breaking effective substance more finely and ensure that it is evenly distributed in the defoamer.

[0064] More specifically, the stirring effect can be optimized and the mixing efficiency can be improved by adjusting the blade design and material of the stirring device. In addition, the use of technologies such as ultrasound or high-pressure homogenization as auxiliary means of stirring can also be considered to further improve the dispersion uniformity of bio-based rapid foam breaking active substances.

[0065] In some embodiments, when the bio-based waterborne polymer antifoam agent is used in the textile, papermaking, detergent and food industries, the amount of the antifoam agent added is 0.1 to 1.0%.

[0066] The first paragraph: This embodiment describes the specific application of bio-based waterborne polymer antifoaming agents in different industries and their addition amount. The textile, paper, detergent and food industries are the main application areas of antifoaming agents. These industries often encounter foaming problems during the production process and need to add antifoaming agents to control foam. The addition amount refers to the proportion of antifoaming agents in the total formula, which is crucial to ensure antifoaming effect and cost-effectiveness.

[0067] Specifically, the amount of antifoaming agent added is 0.1 to 1.0%. This range is the optimal amount of addition based on experiments and practical applications. It can effectively control foam without negatively affecting product performance. In the textile industry, antifoaming agents can help reduce foam in fabric processing and improve production efficiency; in the papermaking industry, they can reduce foam in pulp processing and improve paper quality; in the detergent industry, they can improve cleaning effects and reduce foam accumulation; in the food industry, they can control foam in the fermentation process and ensure product quality. These parameters can be adjusted according to specific industrial processes and product requirements.

[0068] Preferably, the amount of antifoam agent added can be fine-tuned according to specific application conditions and foam characteristics. For example, under high temperature or high shear conditions, it may be necessary to increase the amount of antifoam agent added to maintain the foam control effect.

[0069] More specifically, the optimal addition amount under different conditions can be determined through experiments, and the production process can be adjusted according to the experimental results. In addition, computer simulation and online monitoring technology can be considered to optimize the addition amount to ensure that the antifoaming agent can play the best effect at different production stages. These alternatives can help companies reduce costs and improve production efficiency while ensuring product quality.

[0070] In some embodiments, the bio-based waterborne polymer antifoaming agent uses soybean oil polyol and polycarbonate diol as a fast-breaking effective substance, and the mass ratio of the two is 7:3 to 3:7.

[0071] This embodiment involves using soybean oil polyol and polycarbonate diol as a foam suppressor that is effective for rapid foam breaking. Soybean oil polyol is a compound derived from soybean oil and has multiple hydroxyl groups, while polycarbonate diol is a polymer containing carbonate groups. This composite method can achieve the function of rapid foam breaking, wherein the mass ratio of soybean oil polyol to polycarbonate diol is 7:3 to 3:7, and this ratio range is optimized to ensure that the two components can work synergistically to achieve the best foam breaking effect.

[0072] Specifically, the mass ratio of soybean oil polyol to polycarbonate diol can be adjusted according to the characteristics of the foam and the requirements for foam breaking. Within this ratio range, the hydroxyl value of soybean oil polyol is 80 mgKOH / g and the molecular weight is 2500, while the hydroxyl value of polycarbonate diol is 120 mgKOH / g and the number average molecular weight (Mn) is 1000.

[0073] Furthermore, the setting of these parameters ensures that the ratio of the two components in the defoamer can provide sufficient surface activity to break the foam and maintain the stability of the defoamer. In practical applications, the ratio of the two components can be adjusted according to the specific conditions of the foam, such as the foam generation rate, stability and environmental conditions, to optimize the defoaming performance.

[0074] Preferably, the mass ratio of soybean oil polyol to polycarbonate diol can be determined by experiment to find the best ratio to suit a specific industrial application. For example, in an industrial process that requires stronger bubble breaking power, the ratio of soybean oil polyol may be increased; while in a case where a more durable anti-foaming effect is required, the ratio of polycarbonate diol may be increased.

[0075] More specifically, the addition amount of the two components can be strictly controlled during the production process through precise metering equipment to ensure the accuracy of the ratio. In addition, other bio-based polyols or polyester diols with similar functions can also be considered as substitutes to adapt to different industrial needs and environmental conditions, or a small amount of surfactant can be added to further enhance the foam breaking effect.

[0076] In some embodiments, the bio-based aqueous polymer antifoaming agent uses a bio-based emulsifier compounded with bio-based polyethylene glycol and lecithin, and the mass ratio of bio-based polyethylene glycol to lecithin is 5:4.

[0077] This embodiment describes the specific composition of the bio-based emulsifier, that is, the compound use of bio-based polyethylene glycol and lecithin. Bio-based polyethylene glycol is a water-soluble polymer derived from renewable resources, while lecithin is a natural surfactant that is widely present in plant and animal cell membranes. This compounded bio-based emulsifier helps to improve the compatibility of the components in the antifoam agent, thereby enhancing the stability and efficacy of the antifoam agent.

[0078] Specifically, the molecular weight of bio-based polyethylene glycol ranges from 200 to 600, and this range of molecular weight ensures that polyethylene glycol has good solubility and emulsification ability in antifoaming agents. The phospholipid content of lecithin is not less than 80%, which ensures the activity and emulsification effect of lecithin. When preparing antifoaming agents, the mass ratio of bio-based polyethylene glycol to lecithin is 5:4. This ratio is based on experiments and application effects and can ensure the optimal performance of the emulsifier. By adjusting this ratio, the performance of the antifoaming agent can be optimized according to the needs of different application scenarios.

[0079] Preferably, the mass ratio of bio-based polyethylene glycol to lecithin can be fine-tuned according to specific application requirements. For example, in industrial processes that require stronger emulsification, the proportion of lecithin may be increased; while in cases where more lasting stability is required, the proportion of bio-based polyethylene glycol may be increased.

[0080] More specifically, the optimal emulsification ratio under different conditions can be determined through experiments, and the production process can be adjusted according to the experimental results. In addition, other bio-based emulsifiers with similar functions, such as sucrose esters or citrate esters, can also be considered as alternatives to adapt to different industrial needs and environmental conditions. These alternatives can help companies reduce costs and improve production efficiency while ensuring product quality.

[0081] In some embodiments, the bio-based water-based polymer antifoam agent uses a bio-based fast-breaking foam effective substance, bio-based hydrophobic particles and a bio-based emulsifier, and the hydroxyl value of the bio-based fast-breaking foam effective substance ranges from 80 to 120 mgKOH / g, the particle size of the bio-based hydrophobic particles ranges from 0.1 to 10 microns, and the HLB value of the bio-based emulsifier ranges from 8 to 18.

[0082] This embodiment relates to the specific composition and parameter settings of bio-based water-based polymer defoamers. The hydroxyl value of the bio-based rapid defoaming effective substance ranges from 80 to 120 mgKOH / g, which is an indicator of the hydroxyl content in the polyol and directly affects its reactivity and defoaming effect. The particle size of the bio-based hydrophobic particles ranges from 0.1 to 10 microns, and the particle size affects its dispersibility and defoaming efficiency in the system. The HLB value of the bio-based emulsifier ranges from 8 to 18. The HLB value is an indicator of the hydrophilic-lipophilic balance of the emulsifier, which is crucial for forming a stable emulsion.

[0083] Specifically, the hydroxyl value of the bio-based rapid foam breaking active substance is determined by laboratory testing to ensure that it is in the range of 80 to 120 mgKOH / g to meet the needs of different industrial applications. The particle size of the bio-based hydrophobic particles is controlled in the range of 0.1 to 10 microns by physical methods such as screening or grinding to ensure its effective dispersion in the defoamer. The HLB value of the bio-based emulsifier is controlled in the range of 8 to 18 by adjusting the ratio of its hydrophilic and lipophilic components to meet different emulsification needs. The precise setting of these parameters is crucial to ensure the performance and stability of the defoamer.

[0084] Preferably, the hydroxyl value of the bio-based fast foam breaking effective substance can be adjusted to adapt to a specific industrial environment. For example, under high temperature or strong acid and alkali conditions, a higher hydroxyl value may be required to enhance its reactivity.

[0085] More specifically, the particle size can be precisely controlled by selecting appropriate bio-based hydrophobic particle materials, such as polylactic acid or carnauba wax, and adjusting their preparation process. For bio-based emulsifiers, their emulsification effect can be optimized by mixing emulsifiers with different HLB values ​​or adjusting their formulation ratio.

[0086] Furthermore, other bio-based materials, such as natural fatty alcohols or plant extracts, can also be considered as alternative or supplementary ingredients to improve the environmental adaptability and performance of antifoam agents. These alternatives help to improve the versatility and market competitiveness of antifoam agents.

[0087] Example 1

[0088] A method for preparing a bio-based water-based polymer foam suppressor, comprising the following raw materials in parts by weight: 10 parts of water-based acrylic polymer, 1.5 parts of polylactic acid, 2100 parts of soybean oil polyol, 900 parts of polycarbonate diol, 300 parts of bio-based polyethylene glycol, 72 parts of lecithin and an appropriate amount of water. The preparation method of this embodiment comprises the following steps:

[0089] S1. The aqueous acrylate polymer, polylactic acid and bio-based polyethylene glycol were put into a stirring device in proportion by weight and stirred at a speed of 1500 rpm for 45 minutes to fully mix the components. The temperature during stirring was controlled at 25 degrees Celsius;

[0090] S2. The soybean oil polyol and the polycarbonate diol were mixed in a mass ratio of 7:3 and then added to the mixture of step S1, and stirred at a speed of 800 rpm for 30 minutes to ensure that the quick foam breaking effective material was evenly dispersed;

[0091] S3. Finally, lecithin is added to the mixture of step S2, and stirring is continued for 15 minutes to allow the bio-based emulsifier to be fully combined with the mixture to form a stable bio-based water-based polymer antifoaming agent.

[0092] In this embodiment, the soybean oil polyol used has a hydroxyl value of 80 mgKOH / g and a molecular weight of 2500; the polycarbonate diol has a hydroxyl value of 120 mgKOH / g and a number average molecular weight (Mn) of 1000; the molecular weight of the bio-based polyethylene glycol is 250; and the phospholipid content of the lecithin is 80%. The selection and proportion of these raw materials ensure the high efficiency and stability of the antifoaming agent.

[0093] Experimental data:

[0094] Synthesis method: Follow the above steps S1 to S3.

[0095] Reaction conditions: stirring speeds were 1500 rpm, 800 rpm and 800 rpm, respectively; stirring times were 45 minutes, 30 minutes and 15 minutes, respectively; and stirring temperature was controlled at 25 degrees Celsius.

[0096] Yield: The theoretical yield is 100%, and the actual yield is 98%.

[0097] Performance test: measured by a foam tester, the foam inhibitor can effectively control the generation and stability of foam and improve production efficiency when added at a dosage of 0.5% in the textile industry.

[0098] Uses and effects: This foam suppressant is suitable for the textile, papermaking, detergent and food industries. Experiments show that when the addition amount is 0.5%, it can effectively control foam and improve the stability of the production process and product quality.

[0099] Example 2

[0100] A method for preparing a bio-based water-based polymer foam suppressor, comprising the following raw materials in parts by weight: 12 parts of a high molecular weight water-based acrylic polymer, 1.8 parts of polylactic acid, 2100 parts of soybean oil polyol, 900 parts of polycarbonate diol, 400 parts of bio-based polyethylene glycol, 80 parts of lecithin and an appropriate amount of water. The preparation method of this embodiment comprises the following steps:

[0101] S1. The high molecular weight water-based acrylic polymer, polylactic acid and bio-based polyethylene glycol were put into a stirring device according to the weight ratio, and stirred at a speed of 1800 rpm for 50 minutes to fully mix the components. The temperature during stirring was controlled at 22 degrees Celsius;

[0102] S2. The soybean oil polyol and the polycarbonate diol were mixed in a mass ratio of 7:3 and then added to the mixture of step S1, and stirred at a speed of 900 rpm for 40 minutes to ensure that the rapid foam breaking effective material was evenly dispersed;

[0103] S3. Finally, lecithin is added to the mixture of step S2, and stirring is continued for 20 minutes to allow the bio-based emulsifier to be fully combined with the mixture to form a stable bio-based water-based polymer antifoaming agent.

[0104] In this embodiment, the molecular weight of the high molecular weight waterborne acrylic polymer used is greater than 150,000, the hydroxyl value of soybean oil polyol is 80 mgKOH / g and the molecular weight is 2500; the hydroxyl value of polycarbonate diol is 120 mgKOH / g and the number average molecular weight (Mn) is 1000; the molecular weight of bio-based polyethylene glycol is 300; and the phospholipid content of lecithin is 80%. The selection and proportion setting of these raw materials ensure the high efficiency and stability of the antifoaming agent.

[0105] Experimental data:

[0106] Synthesis method: Follow the above steps S1 to S3.

[0107] Reaction conditions: stirring speeds were 1800 rpm, 900 rpm and 900 rpm, respectively; stirring times were 50 min, 40 min and 20 min, respectively; and stirring temperature was controlled at 22 degrees Celsius.

[0108] Yield: The theoretical yield is 100%, and the actual yield is 97%.

[0109] Performance test: measured by a foam tester, the foam inhibitor can effectively control the generation and stability of foam and improve production efficiency when added at a dosage of 0.8% in the papermaking industry.

[0110] Uses and effects: This foam suppressant is suitable for the textile, papermaking, detergent and food industries. Experiments show that when the addition amount is 0.8%, it can effectively control foam and improve the stability of the production process and product quality.

[0111] Example 3

[0112] A method for preparing a bio-based water-based polymer foam suppressor, comprising the following raw materials in parts by weight: 10 parts of water-based acrylate polymer, 1.2 parts of carnauba wax, 2000 parts of soybean oil polyol, 1200 parts of polycarbonate diol, 500 parts of bio-based polyethylene glycol, 75 parts of lecithin and an appropriate amount of water. The preparation method of this embodiment comprises the following steps:

[0113] S1. The aqueous acrylate polymer and carnauba wax were put into a stirring device according to a weight ratio and stirred at a speed of 1500 rpm for 30 minutes to fully mix the components. The temperature during stirring was controlled at 28 degrees Celsius;

[0114] S2. The soybean oil polyol and the polycarbonate diol were mixed in a mass ratio of 7:3 and then added to the mixture of step S1, and stirred at a speed of 600 rpm for 45 minutes to ensure that the rapid foam breaking effective material was evenly dispersed;

[0115] S3. Finally, add the bio-based polyethylene glycol and lecithin to the mixture of step S2, and continue stirring for 20 minutes to allow the bio-based emulsifier to fully combine with the mixture to form a stable bio-based water-based polymer antifoaming agent.

[0116] In this embodiment, the melting point of the carnauba wax used is 85 degrees Celsius, the hydroxyl value of soybean oil polyol is 80 mgKOH / g, and the molecular weight is 2500; the hydroxyl value of polycarbonate diol is 120 mgKOH / g, and the number average molecular weight (Mn) is 1000; the molecular weight of bio-based polyethylene glycol is 400; and the phospholipid content of lecithin is 80%. The selection and proportion setting of these raw materials ensure the high efficiency and stability of the antifoaming agent.

[0117] Experimental data:

[0118] Synthesis method: Follow the above steps S1 to S3.

[0119] Reaction conditions: stirring speeds were 1500 rpm, 600 rpm and 600 rpm, respectively; stirring times were 30 minutes, 45 minutes and 20 minutes, respectively; and stirring temperature was controlled at 28 degrees Celsius.

[0120] Yield: The theoretical yield is 100%, and the actual yield is 97%.

[0121] Performance test: As measured by a foam tester, the foam inhibitor can effectively control the generation and stability of foam and improve cleaning efficiency when added at a level of 0.6% in the detergent industry.

[0122] Uses and effects: This foam suppressant is suitable for the textile, papermaking, detergent and food industries. Experiments show that when the addition amount is 0.6%, it can effectively control foam and improve the stability of the production process and product quality.

[0123] Example 4

[0124] A method for preparing a bio-based water-based polymer antifoaming agent, comprising the following raw materials in parts by weight: 12 parts of water-based acrylic polymer, 1.5 parts of polylactic acid, 2500 parts of soybean oil polyol, 1500 parts of polycarbonate diol, 450 parts of bio-based polyethylene glycol, 90 parts of lecithin and an appropriate amount of water. The preparation method of this embodiment comprises the following steps:

[0125] S1. The water-based acrylate polymer, polylactic acid and bio-based polyethylene glycol were put into a stirring device according to the weight ratio, and stirred at a speed of 1600 rpm for 40 minutes to fully mix the components. The temperature during stirring was controlled at 25 degrees Celsius;

[0126] S2. The soybean oil polyol and the polycarbonate diol were mixed in a mass ratio of 7:3 and then added to the mixture of step S1, and stirred at a speed of 700 rpm for 50 minutes to ensure that the rapid foam breaking effective material was evenly dispersed;

[0127] S3. Finally, lecithin is added to the mixture of step S2, and stirring is continued for 25 minutes to allow the bio-based emulsifier to be fully combined with the mixture to form a stable bio-based water-based polymer antifoaming agent.

[0128] In this embodiment, the soybean oil polyol used has a hydroxyl value of 80 mgKOH / g and a molecular weight of 2500; the polycarbonate diol has a hydroxyl value of 120 mgKOH / g and a number average molecular weight (Mn) of 1000; the molecular weight of the bio-based polyethylene glycol is 300; and the phospholipid content of the lecithin is 90%. The selection and proportion of these raw materials ensure the high efficiency and stability of the antifoaming agent.

[0129] Experimental data:

[0130] Synthesis method: Follow the above steps S1 to S3.

[0131] Reaction conditions: stirring speeds were 1600 rpm, 700 rpm and 700 rpm, respectively; stirring times were 40 min, 50 min and 25 min, respectively; and stirring temperature was controlled at 25 degrees Celsius.

[0132] Yield: The theoretical yield is 100%, and the actual yield is 98%.

[0133] Performance test: measured by a foam tester, the foam inhibitor can effectively control the generation and stability of foam and improve processing efficiency when added at a dosage of 0.3% in the food industry.

[0134] Uses and effects: This foam suppressant is suitable for the textile, papermaking, detergent and food industries. Experiments show that when the addition amount is 0.3%, it can effectively control foam and improve the stability of the production process and product quality.

[0135] Example 5

[0136] A method for preparing a bio-based water-based polymer foam suppressor, comprising the following raw materials in parts by weight: 10 parts of water-based acrylic polymer, 2 parts of carnauba wax, 2800 parts of soybean oil polyol, 1200 parts of polycarbonate diol, 300 parts of bio-based polyethylene glycol, 70 parts of lecithin and an appropriate amount of water. The preparation method of this embodiment comprises the following steps:

[0137] S1. The water-based acrylate polymer, carnauba wax and bio-based polyethylene glycol were put into a stirring device in proportion by weight and stirred at a speed of 1800 rpm for 45 minutes to fully mix the components. The temperature during stirring was controlled at 26 degrees Celsius;

[0138] S2. The soybean oil polyol and the polycarbonate diol were mixed in a mass ratio of 7:3 and then added to the mixture of step S1, and stirred at a speed of 800 rpm for 40 minutes to ensure that the rapid foam breaking effective material was evenly dispersed;

[0139] S3. Finally, lecithin is added to the mixture of step S2, and stirring is continued for 30 minutes to allow the bio-based emulsifier to be fully combined with the mixture to form a stable bio-based water-based polymer antifoaming agent.

[0140] In this embodiment, the molecular weight of the bio-based polyethylene glycol used is 250, and the phospholipid content of the lecithin is 70%. The selection and proportion setting of these raw materials ensure the high efficiency and stability of the antifoaming agent.

[0141] Experimental data:

[0142] Synthesis method: Follow the above steps S1 to S3.

[0143] Reaction conditions: stirring speeds were 1800 rpm, 800 rpm and 800 rpm, respectively; stirring times were 45 minutes, 40 minutes and 30 minutes, respectively; and stirring temperature was controlled at 26 degrees Celsius.

[0144] Yield: The theoretical yield is 100%, and the actual yield is 97%.

[0145] Performance test: measured by a foam tester, the foam inhibitor can effectively control the generation and stability of foam and improve production efficiency when added at a dosage of 0.5% in the textile industry.

[0146] Uses and effects: This foam suppressant is suitable for the textile, papermaking, detergent and food industries. Experiments show that when the addition amount is 0.5%, it can effectively control foam and improve the stability of the production process and product quality.

[0147] Comparative Example 1

[0148] This comparative example is a bio-based waterborne polymer antifoam agent, which is prepared from the following raw materials in parts by weight:

[0149] 10 parts of water-based acrylate polymer, 1.5 parts of polylactic acid, 1500 parts of soybean oil polyol, 500 parts of polycarbonate diol, 300 parts of bio-based polyethylene glycol, 50 parts of lecithin and appropriate amount of water;

[0150] The preparation method of the above-mentioned foam suppressant comprises the following steps:

[0151] (a) adding water-based acrylic polymer, polylactic acid and bio-based polyethylene glycol in a stirring device according to a weight ratio, and continuously stirring at a speed of 1500 rpm for 30 minutes to fully mix the components, and controlling the temperature during the stirring process at 25 degrees Celsius;

[0152] (b) mixing soybean oil polyol and polycarbonate diol in a mass ratio of 3:1, and then adding the mixture to the mixture of step (a), and continuing to stir at a speed of 600 rpm for 30 minutes to ensure that the rapid foam breaking effective substance is evenly dispersed;

[0153] (c) Finally, lecithin is added to the mixture of step (b), and stirring is continued for 15 minutes to allow the bio-based emulsifier to be fully combined with the mixture to form a stable bio-based water-based polymer antifoaming agent.

[0154] Comparative Example 2

[0155] This comparative example is a bio-based waterborne polymer antifoam agent, which is prepared from the following raw materials in parts by weight:

[0156] 10 parts of water-based acrylate polymer, 1.5 parts of polylactic acid, 3000 parts of soybean oil polyol, 1000 parts of polycarbonate diol, 300 parts of bio-based polyethylene glycol, 50 parts of lecithin and appropriate amount of water;

[0157] The preparation method of the above-mentioned foam suppressant comprises the following steps:

[0158] (a) adding water-based acrylic polymer, polylactic acid and bio-based polyethylene glycol in a stirring device according to a weight ratio, and continuously stirring at a speed of 1500 rpm for 30 minutes to fully mix the components, and controlling the temperature during the stirring process at 25 degrees Celsius;

[0159] (b) mixing soybean oil polyol and polycarbonate diol in a mass ratio of 3:1, and then adding the mixture to the mixture of step (a), and continuing to stir at a speed of 600 rpm for 30 minutes to ensure that the rapid foam breaking effective substance is evenly dispersed;

[0160] (c) Finally, lecithin is added to the mixture of step (b), and stirring is continued for 15 minutes to allow the bio-based emulsifier to be fully combined with the mixture to form a stable bio-based water-based polymer antifoaming agent.

[0161] Experimental example

[0162] The bio-based water-based polymer antifoaming agents prepared in Example 6 and Comparative Examples 1-2 were obtained respectively;

[0163] When used in the textile, paper, detergent and food industries, the test was conducted at an addition amount of 0.5%;

[0164] Test method:

[0165] The foam suppressant was added into the corresponding industrial system at an addition amount of 0.5%, and the foam generation and stability were measured by a foam tester;

[0166] The statistics of foam generation and stability are shown in Tables 1 to 3:

[0167] Table 1 Statistics of foam generation and stability in the textile industry

[0168] Group Foam generation (ml) Foam stability (min) Example 6 10 60 Comparative Example 1 20 30 Comparative Example 2 15 40

[0169] Table 2 Statistics of foam generation and stability in papermaking industry

[0170] Group Foam generation (ml) Foam stability (min) Example 6 8 70 Comparative Example 1 18 35 Comparative Example 2 12 45

[0171] Table 3 Statistics of foam generation and stability of detergent industry

[0172] Group Foam generation (ml) Foam stability (min) Example 6 12 65 Comparative Example 1 22 25 Comparative Example 2 17 38

[0173] From Tables 1 to 3, we can see that:

[0174] The bio-based aqueous polymer antifoaming agent prepared by the technical solution of the present application and the comparative example has a certain effect on foam control in different industrial applications. Compared with the comparative example, the antifoaming agent prepared by the technical solution of the present application has significant advantages in foam generation and stability.

[0175] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

[0176] The above descriptions are only some preferred embodiments of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present invention is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the embodiments of the present invention to form a technical solution.

Claims

1. A bio-based waterborne polymer antifoam agent, characterized in that: The raw material components include the following components in parts by weight: Aqueous acrylate polymer, 5-15 parts by weight; Bio-based hydrophobic particles, 1-2 parts by weight; Bio-based rapid foam breaking effective substance, 70-90 parts by weight; The bio-based emulsifier is present in an amount of 6 to 10 parts by weight.

2. The bio-based waterborne polymer antifoam agent according to claim 1, characterized in that: The water-based acrylic ester polymer is a water-based acrylic ester polymer with a large molecular weight.

3. The bio-based waterborne polymer antifoam agent according to claim 1, characterized in that: The bio-based hydrophobic particles are polylactic acid or carnauba wax, and the molecular weight of the polylactic acid ranges from 10,000 to 50,000, and the melting point of the carnauba wax is from 80 to 90 degrees Celsius.

4. The bio-based waterborne polymer antifoam agent according to claim 1, characterized in that: The bio-based fast foam breaking effective material is soybean oil polyol and polycarbonate diol, wherein the soybean oil polyol has a hydroxyl value of 80 mgKOH / g and a molecular weight of 2500, the polycarbonate diol has a hydroxyl value of 120 mgKOH / g, Mn = 1000, and the mass ratio of the two is 7:3 to 3:

7.

5. The bio-based waterborne polymer antifoam agent according to claim 1, characterized in that: The bio-based emulsifier is bio-based polyethylene glycol and lecithin, which are used in combination, wherein the molecular weight of the bio-based polyethylene glycol ranges from 200 to 600, and the phospholipid content of the lecithin is not less than 80%.

6. A method for preparing the bio-based waterborne polymer antifoaming agent according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: prepare raw materials according to the weight ratio; Step 2: Put the water-based acrylic polymer, the bio-based hydrophobic particles and the bio-based emulsifier into a stirring device in sequence, and continue stirring at a speed of 1000 rpm to 2000 rpm for 30 to 60 minutes to fully mix the components; Step 3: Add the bio-based rapid foam breaking effective substance and continue stirring at a speed of 500 to 1000 rpm for 30 minutes to obtain a bio-based water-based polymer antifoam agent, wherein the temperature during the stirring process is controlled at 20 to 30 degrees Celsius.

7. The bio-based waterborne polymer antifoam agent according to any one of claims 1 to 5, characterized in that: When used in the textile, paper, detergent and food industries, the defoamer is added in an amount of 0.1 to 1.0%.

8. The bio-based waterborne polymer antifoam agent according to any one of claims 1 to 5, characterized in that: Soybean oil polyol and polycarbonate diol are compounded as a quick foam breaking effective substance, and the mass ratio of the two is 7:3 to 3:

7.

9. The bio-based waterborne polymer antifoam agent according to any one of claims 1 to 5, characterized in that: A bio-based emulsifier prepared by compounding bio-based polyethylene glycol and lecithin is used, and the mass ratio of bio-based polyethylene glycol to lecithin is 5:

4.

10. The bio-based waterborne polymer antifoam agent according to any one of claims 1 to 5, characterized in that: Bio-based fast foam-breaking effective substances, bio-based hydrophobic particles and bio-based emulsifiers are used, and the hydroxyl value of the bio-based fast foam-breaking effective substances ranges from 80 to 120 mgKOH / g, the particle size of the bio-based hydrophobic particles ranges from 0.1 to 10 microns, and the HLB value of the bio-based emulsifier ranges from 8 to 18.

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