CN110846107A - Defoaming and releasing agent for concrete and preparation method thereof - Google Patents
Defoaming and releasing agent for concrete and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/10—Compounds containing silicon
- C10M2201/105—Silica
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/16—Paraffin waxes; Petrolatum, e.g. slack wax
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/10—Carboxylix acids; Neutral salts thereof
- C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
- C10M2207/126—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids monocarboxylic
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/40—Fatty vegetable or animal oils
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/105—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing three carbon atoms only
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/108—Polyethers, i.e. containing di- or higher polyoxyalkylene groups etherified
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
- C10M2209/109—Polyethers, i.e. containing di- or higher polyoxyalkylene groups esterified
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/12—Polysaccharides, e.g. cellulose, biopolymers
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
- C10M2229/04—Siloxanes with specific structure
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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- Degasification And Air Bubble Elimination (AREA)
Abstract
The invention discloses a defoaming and releasing agent for concrete and a preparation method thereof, wherein the defoaming and releasing agent comprises the following components, by weight, 20-25 parts of paraffin, 10-15 parts of stearic acid, 15-20 parts of polysiloxane and 3-6 parts of an auxiliary emulsifier; 1-2 parts of a stabilizer, 1-2 parts of a thickening agent, 14-18 parts of glycerol polyoxyethylene polyoxypropylene ether, 4-8 parts of vegetable oil, 1-3 parts of hydrophobic fumed silica, 2-3 parts of an emulsifier and 160-200 parts of deionized water. The defoaming release agent has stable performance, strong adaptability, good demoulding effect and strong foam inhibition, and can improve the appearance quality of concrete.
Description
Technical Field
The invention relates to the technical field of building concrete, in particular to a defoaming release agent for concrete and a preparation method thereof.
Background
With the development of new concrete technology and new technology, the requirement on the decorative effect of the concrete surface is higher and higher. In the concrete engineering construction, due to the influence of factors such as raw materials, mixing proportion, construction process and the like, the honeycomb pitted surface on the concrete surface is always an important difficult problem which puzzles the engineering world. The honeycomb pitted surface not only affects the apparent effect of the concrete, but also affects the inherent quality of the concrete in severe cases.
The research and development of the concrete defoamer and the release agent are exactly aiming at improving the appearance quality of concrete, mainly have the functions of improving the appearance quality of concrete members, and simultaneously have the functions of improving the strength of concrete, preventing seepage, reducing surface carbonization and shrinkage and the like. The following effects can be achieved by adding the defoaming agent during the production of concrete: 1. the generation of bubbles is effectively reduced; 2. the large bubbles are changed into small bubbles, and the small bubbles are eliminated; 3. prevent the bubbles from communicating to form communicated pores and enhance the impermeability. The addition of the release agent has the following effects: 1. the adhesion of the concrete and the member is prevented, and the demoulding is convenient; 2. the adhesion of bubbles to the template is reduced, and the bubbles are convenient to remove; 3. part of the release agent can protect the concrete surface and form surface hardness. These functions are all to eliminate the surface and internal bubbles of the concrete, reduce the pores and improve the appearance.
The defoaming agent in the current market mainly comprises polyether, organic silicone oil and silicon polyether; most of the release agents are waste engine oil, fatty acid, paraffin and emulsified oil release agents, and the types of the release agents are various. When in use, each defoaming agent and the release agent have respective adaptability and are influenced by the difference of regional environment, materials and construction process, the defoaming agent and the release agent have larger difference and different effects in engineering use, and the defoaming agent and the release agent are often difficult to achieve ideal effects when being used in a composite way.
Disclosure of Invention
The defoaming and releasing agent for concrete provided by the invention has the advantages of stable performance, strong adaptability, good demoulding effect and strong foam inhibition, and can improve the appearance quality of concrete.
The invention provides a defoaming release agent for concrete and a preparation method thereof, wherein the defoaming release agent comprises the following components in parts by weight: 20-25 parts of paraffin, 10-15 parts of stearic acid, 15-20 parts of polysiloxane and 3-6 parts of a co-emulsifier; 1-2 parts of a stabilizer, 1-2 parts of a thickening agent, 14-18 parts of glycerol polyoxyethylene polyoxypropylene ether, 4-8 parts of vegetable oil, 1-3 parts of hydrophobic fumed silica, 2-3 parts of an emulsifier and 160-200 parts of deionized water.
In a preferable scheme, 20 parts of paraffin, 13 parts of stearic acid, 20 parts of polysiloxane and 5 parts of co-emulsifier; 2 parts of stabilizing agent, 2 parts of thickening agent, 16 parts of glycerol polyoxyethylene polyoxypropylene ether, 6 parts of vegetable oil, 1 part of hydrophobic fumed silica, 2 parts of emulsifying agent and 180 parts of deionized water.
Further, the emulsifier is 1 or 2 of polyoxyethylene sorbitan monooleate, fatty alcohol polyglycol ether and polyoxyethylene stearate.
Further, the thickener is a fatty alcohol.
Further, the coemulsifier is ethyl acetate.
Further, the stabilizer is hydroxymethyl cellulose.
The invention also relates to a method for preparing the defoaming and releasing agent for concrete, which comprises the following steps:
1) heating, melting and mixing paraffin, stearic acid, a co-emulsifier and vegetable oil, heating part of deionized water to 75-80 ℃, adding into the melted mixture, and stirring to cool to room temperature to obtain a composition A for later use;
2) mixing polysiloxane and glycerol polyoxyethylene polyoxypropylene ether, heating to 180-200 ℃, stirring for 10-15 min, adding hydrophobic fumed silica, an emulsifier, a thickener, a stabilizer and the rest deionized water, cooling to 80-100 ℃, and stirring for 60-70 min to obtain a composition B for later use;
3) and stirring the composition A and the composition B at room temperature for 15-25 min to obtain the defoaming and releasing agent for concrete.
Further, the dosage of the deionized water in the step 1) and the dosage of the deionized water in the step 2) are 90-110: 70-90.
Further, the temperature of the heating, melting and mixing in the step 1) is 50-70 ℃.
The defoaming agent is an organic silicon defoaming agent, wherein after an active component formed by polysiloxane, glycerol polyoxyethylene polyoxypropylene ether and hydrophobic fumed silica is added into a foaming system, the active component has lower surface activity and is quickly distributed on the liquid surface, so that a new elastic film is inhibited from being formed, namely the generation of foam is stopped. On the other hand, the active ingredient is spread on the surface of the foam elastic membrane and further diffuses and permeates on the surface of the membrane, so that the membrane wall is quickly thinned, the balance and stable system of the foam is damaged, and the foam is also strongly pulled by the liquid with large tension on the surrounding surface, thereby causing the foam breaking. The invention selects polysiloxane as the main raw material, has the characteristics of strong defoaming effect, low surface tension, low volatility, no toxicity and no pollution, has good adaptability when being compounded with glycerol polyoxyethylene polyoxypropylene ether for use, is suitable for various cement paste systems, and has the characteristics of quick defoaming on the surface of concrete and good foam inhibition performance.
The paraffin release agent adopts a phase transfer emulsification method, an oil phase and a water phase which take paraffin as main raw materials are respectively heated to a certain temperature, and are emulsified at high speed in the presence of an emulsifier to form an oil-in-water type uniform, fine and stable emulsion. The emulsified wax is very flexible when put into use, and many emulsified waxes can naturally show the advantages of film forming homogenization, excellent coverage, flatness, smoothness, good glossiness, good water resistance and the like without operations such as heating and melting or dissolving with a solvent.
The paraffin release agent has stable property and is easy to be compounded with aqueous solution or emulsion of other substances for use. The organic silicon defoamer has small surface tension, strong defoaming capability and high chemical stability, and is not easy to have chemical reaction with a foaming medium. The paraffin release agent and the organic silicon defoaming agent have stable properties, the paraffin release agent is easy to be compounded with aqueous solution or emulsion of other substances for use, and the organic silicon has good lubricity, so that the defoaming release agent for concrete consisting of the organic silicon defoaming agent and the paraffin release agent can play a stable defoaming and demolding effect and has strong adaptability. In order to realize compatibility and good stability of the organic silicon defoaming agent and the paraffin release agent, the ethyl acetate is selected as the co-emulsifier, and the hydroxymethyl cellulose is selected as the stabilizer, so that the problem of compatibility of the organic silicon defoaming agent and the paraffin release agent is solved, the stability is good, and the storage time is long.
The defoaming release agent for concrete provided by the invention has good stability, good film forming effect and good demoulding effect, and the surface of the concrete after demoulding is smooth and clean and has no pollution; the defoaming capability is strong, the surface foaming of the concrete is well inhibited, and few bubbles exist on the surface of the concrete after demoulding; the concrete defoamer and the concrete release agent have the effects of both the concrete defoamer and the concrete release agent, and have strong adaptability, simple construction process and good stability; low cost, economy, environmental protection and easy popularization and application.
Drawings
FIG. 1 is a schematic view of a blank concrete after demolding;
FIG. 2 is a schematic diagram showing the appearance of a commercially available concrete after demolding;
FIG. 3 is a schematic view showing the appearance of concrete obtained by using the defoaming agent for concrete in example 1 after releasing it.
FIG. 4 is a schematic view showing the appearance of concrete obtained by using the defoaming agent for concrete in example 2 after releasing the concrete.
FIG. 5 is a schematic view showing the appearance of concrete obtained by using the defoaming agent for concrete in example 3 after releasing the concrete.
Detailed Description
The invention will be further elucidated with reference to the following examples.
Example 1:
the defoaming and releasing agent for concrete comprises the following raw materials in parts by weight:
20g of paraffin, 13g of stearic acid, 20g of polysiloxane and 5g of auxiliary emulsifier; 2g of stabilizing agent, 2g of thickening agent, 16g of glycerol polyoxyethylene polyoxypropylene ether, 6g of vegetable oil, 1g of hydrophobic fumed silica, 2g of emulsifying agent and 180g of deionized water.
The specific auxiliary emulsifier is ethyl acetate, the emulsifier is polyoxyethylene sorbitan monooleate, the stabilizer is hydroxymethyl cellulose, and the thickener is fatty alcohol.
During preparation, the paraffin, the stearic acid, the co-emulsifier and the vegetable oil are put into a container and heated to 50-70 ℃ for melting, and 100g of deionized water is heated to 75-80 ℃ in another container. And pouring the heated water into the mixture of the paraffin, the stearic acid, the co-emulsifier and the vegetable oil, continuously stirring in the adding process, and continuously stirring after the adding is finished until the mixture is cooled to room temperature to obtain the composition A. Mixing polysiloxane and glycerol polyoxyethylene polyoxypropylene ether, heating to 180-200 ℃, stirring for 13min, and adding hydrophobic fumed silica, an emulsifier, a thickener, a stabilizer and 80g of deionized water. Cooling to 80-100 ℃, and stirring for 65min to obtain the composition B. And stirring the composition A and the composition B for 20min at room temperature to obtain the defoaming and releasing agent for concrete.
Example 2:
the defoaming and releasing agent for concrete comprises the following raw materials in parts by weight:
23g of paraffin, 10g of stearic acid, 15g of polysiloxane and 3g of auxiliary emulsifier; 1g of stabilizer, 1g of thickener, 14g of glycerol polyoxyethylene polyoxypropylene ether, 4g of vegetable oil, 2g of hydrophobic fumed silica, 2g of emulsifier and 160g of deionized water.
The specific auxiliary emulsifier is ethyl acetate, the emulsifier is fatty alcohol polyglycol ether, the stabilizer is hydroxymethyl cellulose, and the thickener is fatty alcohol.
During preparation, the paraffin, the stearic acid, the co-emulsifier and the vegetable oil are put into a container and heated to 50-70 ℃ for melting, and 90g of deionized water is heated to 75-80 ℃ in another container. And pouring the heated water into the mixture of the paraffin, the stearic acid, the co-emulsifier and the vegetable oil, continuously stirring in the adding process, and continuously stirring after the adding is finished until the mixture is cooled to room temperature to obtain the composition A. Mixing polysiloxane and glycerol polyoxyethylene polyoxypropylene ether, heating to 180-200 ℃, stirring for 10min, and adding hydrophobic fumed silica, an emulsifier, a thickener, a stabilizer and 70g of deionized water. Cooling to 80-100 ℃, and stirring for 60min to obtain the composition B. And stirring the composition A and the composition B for 15min at room temperature to obtain the defoaming and releasing agent for concrete.
Example 3:
the defoaming and releasing agent for concrete comprises the following raw materials in parts by weight:
25g of paraffin, 15g of stearic acid, 18g of polysiloxane and 6g of emulsification aid; 1g of stabilizer, 2g of thickener, 18g of glycerol polyoxyethylene polyoxypropylene ether, 8g of vegetable oil, 3g of hydrophobic fumed silica, 3g of emulsifier and 200g of deionized water.
The auxiliary emulsifier is ethyl acetate, the emulsifier is polyoxyethylene stearate, the stabilizer is hydroxymethyl cellulose, and the thickener is fatty alcohol.
During preparation, the paraffin, the stearic acid, the co-emulsifier and the vegetable oil are put into a container and heated to 50-70 ℃ for melting, and 110g of deionized water is heated to 75-80 ℃ in another container. And pouring the heated water into the mixture of the paraffin, the stearic acid, the co-emulsifier and the vegetable oil, continuously stirring in the adding process, and continuously stirring after the adding is finished until the mixture is cooled to room temperature to obtain the composition A. Mixing polysiloxane and glycerol polyoxyethylene polyoxypropylene ether, heating to 180-200 ℃, stirring for 15min, and adding hydrophobic fumed silica, an emulsifier, a thickener, a stabilizer and 90g of deionized water. Cooling to 80-100 ℃, and stirring for 70min to obtain the composition B. And stirring the composition A and the composition B at room temperature for 25min to obtain the defoaming and releasing agent for concrete.
Concrete preparation tests were carried out by using the defoaming release agent for concrete prepared in the above examples, and blank sample comparison and commercial sample comparison were carried out at the same time, and the commercial sample was specifically a paraffin release agent.
The experimental method comprises the following steps: the test was selected using a new cast iron concrete test mold (150 mm). Selecting different release agents to coat the test mould, ensuring uniform coating, then loading the concrete which is uniformly mixed in the test mould into the test mould in three layers according to a quartering method, curing and demoulding for one day after the concrete is inserted and mashed according to the standard, and comparing the surface appearance of the concrete, wherein the result is shown in table 1. The blank was concrete without any release agent applied.
TABLE 1 demolding effect of various mold-release agents
From FIGS. 1-5 and Table 1, it can be seen that the test specimens using the release agents of the examples of the present invention are significantly smoother in surface, less in air bubbles and better in application effect, with the corners intact, as compared to the test specimens without release agents or with the release agents applied on the market.
Claims (9)
1. The defoaming and releasing agent for concrete is characterized by comprising the following components in parts by weight: 20-25 parts of paraffin, 10-15 parts of stearic acid, 15-20 parts of polysiloxane and 3-6 parts of a co-emulsifier; 1-2 parts of a stabilizer, 1-2 parts of a thickening agent, 14-18 parts of glycerol polyoxyethylene polyoxypropylene ether, 4-8 parts of vegetable oil, 1-3 parts of hydrophobic fumed silica, 2-3 parts of an emulsifier and 160-200 parts of deionized water.
2. The defoaming release agent for concrete according to claim 1, characterized in that: wherein, 20 parts of paraffin, 13 parts of stearic acid, 20 parts of polysiloxane and 5 parts of auxiliary emulsifier; 2 parts of stabilizing agent, 2 parts of thickening agent, 16 parts of glycerol polyoxyethylene polyoxypropylene ether, 6 parts of vegetable oil, 1 part of hydrophobic fumed silica, 2 parts of emulsifying agent and 180 parts of deionized water.
3. The defoaming release agent for concrete according to claim 1, characterized in that: the emulsifier is 1 or 2 of polyoxyethylene sorbitan monooleate, fatty alcohol polyglycol ether and polyoxyethylene stearate.
4. The defoaming release agent for concrete according to any one of claims 1 to 3, characterized in that: the thickening agent is fatty alcohol.
5. The defoaming release agent for concrete according to any one of claims 1 to 3, characterized in that: the auxiliary emulsifier is ethyl acetate.
6. The defoaming release agent for concrete according to any one of claims 1 to 3, characterized in that: the stabilizer is hydroxymethyl cellulose.
7. A method for preparing the defoaming release agent for concrete according to any one of claims 1 to 6, characterized by comprising the steps of:
1) heating, melting and mixing paraffin, stearic acid, a co-emulsifier and vegetable oil, heating part of deionized water to 75-80 ℃, adding into the melted mixture, and stirring to cool to room temperature to obtain a composition A for later use;
2) mixing polysiloxane and glycerol polyoxyethylene polyoxypropylene ether, heating to 180-200 ℃, stirring for 10-15 min, adding hydrophobic fumed silica, an emulsifier, a thickener, a stabilizer and the rest deionized water, cooling to 80-100 ℃, and stirring for 60-70 min to obtain a composition B for later use;
3) and stirring the composition A and the composition B at room temperature for 15-25 min to obtain the defoaming and releasing agent for concrete.
8. The method of claim 7, wherein: the dosage of the deionized water in the step 1) and the dosage of the deionized water in the step 2) are 90-110: 70-90.
9. The method of claim 7, wherein: the temperature of the heating, melting and mixing in the step 1) is 50-70 ℃.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113999713A (en) * | 2021-11-09 | 2022-02-01 | 赤壁富祥盛科技有限公司 | Bubble-eliminating release agent for aluminum alloy template and preparation method thereof |
| CN114317090A (en) * | 2021-12-31 | 2022-04-12 | 武汉金安顺科技有限公司 | Concrete release agent used in low-temperature environment |
| CN114515815A (en) * | 2022-02-22 | 2022-05-20 | 马鞍山中集瑞江润滑油有限公司 | Water-based magnetic release agent |
| CN116286161A (en) * | 2023-02-15 | 2023-06-23 | 中国建筑第八工程局有限公司 | Demolding and curing integrated agent, synthesis and application method |
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| EP1721718A1 (en) * | 2005-05-09 | 2006-11-15 | Sika, S.A. | Mould release composition for hydraulic binders |
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| CN113999713A (en) * | 2021-11-09 | 2022-02-01 | 赤壁富祥盛科技有限公司 | Bubble-eliminating release agent for aluminum alloy template and preparation method thereof |
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| CN114515815A (en) * | 2022-02-22 | 2022-05-20 | 马鞍山中集瑞江润滑油有限公司 | Water-based magnetic release agent |
| CN116286161A (en) * | 2023-02-15 | 2023-06-23 | 中国建筑第八工程局有限公司 | Demolding and curing integrated agent, synthesis and application method |
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