CN109576043B - Concrete product isolation release agent and preparation method thereof - Google Patents
Concrete product isolation release agent 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
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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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
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- 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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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/36—Release agents or mold release agents
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Abstract
The invention discloses a preparation method of a concrete product isolation release agent, belonging to the field of concrete additives. The preparation method comprises the following steps: firstly, preparing W/O type active nano calcium carbonate-silicone oil composite emulsion by using a film forming substance, an emulsifying agent, water-soluble salt calcium chloride and sodium carbonate as raw materials, and then adding water for phase inversion to obtain the O/W type silicone oil nano calcium carbonate emulsion. The emulsion is suitable for isolating the raw materials from the mould in the processing process of concrete products, can ensure that the surface of the mould is easy to clean, and can repair micro pits and damages on the surface of the mould by adding the nano calcium carbonate component, prolong the service life of the mould, ensure that the surface of the product is smooth and clean, reduce defects and improve the yield.
Description
Technical Field
The invention relates to a concrete product isolation release agent and a preparation method thereof, belonging to the field of concrete additives.
Background
The release agent is used as an important auxiliary agent in the forming process of concrete products, and can improve the appearance and performance of the products and improve the quality of the products. The common release agents are wax, silicone oil, soap, waste engine oil and the like, and have various characteristics; the common concrete product release agent is mainly a waste engine oil release agent, which has serious environmental pollution, a mould is not easy to clean, and micro-pits caused by bubbles are easy to generate on the surface of the product, so that the concrete product release agent which overcomes the defects is urgently needed to be developed.
Therefore, the high-solid-content nano calcium carbonate modified silicone oil emulsion concrete product isolation release agent is developed and used in the processing process of concrete products, so that the raw materials and a metal mold are smoothly separated, the yield is improved, and the market demand can be well met.
Disclosure of Invention
In order to obtain a high-quality concrete product with few micropore defects and smooth surface, simultaneously realize the smooth separation of raw materials and a metal mold and improve the yield, the invention provides a concrete product isolation mold release agent and a preparation method thereof.
In order to realize the purpose of the invention, the invention takes the silicone oil, the emulsifier, the water-soluble salt calcium chloride and the sodium carbonate as raw materials to prepare the active nano calcium carbonate modified silicone oil emulsion, which is a novel concrete product isolation release agent and has better application effect in the isolation release of the concrete product.
The concrete product isolation release agent is prepared by the following specific method:
the weight parts of the raw materials are as follows:
30-40 parts of silicone oil
Modifier 1-10
Calcium chloride 0.3-5
Sodium carbonate 0.3-5
Diluent 9-55.9
Emulsifier 4- - -20
0.5-1% of defoaming agent
The modifier is selected from at least two of ethanol, polyvinyl alcohol, stearic acid and sodium salt thereof; the calcium chloride is a calcium chloride aqueous solution with the concentration of 0.5-2.5mol/L prepared by deionized water; the sodium carbonate is anhydrous sodium carbonate powder or sodium carbonate aqueous solution with the concentration of 0.5-2.5 mol/L; the diluent is deionized water; the emulsifier is at least one of tween-20, tween-60, tween-80, span-20, span-80 and span-60; the defoaming agent is a silicone oil defoaming agent.
The preparation method specifically comprises the following steps: (1) mixing and stirring silicone oil, an emulsifier, a modifier, calcium chloride and deionized water according to the proportion to prepare a silicone oil-calcium chloride solution; (2) adding anhydrous sodium carbonate powder or sodium carbonate aqueous solution slowly into the prepared silicon oil-calcium chloride solution under stirring, wherein the molar ratio of calcium ions to carbonate ions is 1: 1, adding a defoaming agent after the addition is finished, heating to 45-75 ℃, and stirring for reaction to obtain a W/O type nano calcium carbonate modified silicone oil emulsion; (3) adding deionized water, stirring, cooling and phase inversion to obtain O/W type silicone oil nano calcium carbonate emulsion.
Adding a diluent to prepare the concrete product isolation release agent with the solid content of 30-40%.
The principle of the invention is as follows: firstly, one water-soluble salt is mixed with an emulsifier, silicone oil and a modifier to prepare a transparent solution, and then the other water-soluble salt is added into the former solution to prepare the inorganic nano calcium carbonate silicone oil emulsion with controllable morphology and particle size.
The invention has the advantages that: 1. the novel concrete product isolation release agent is prepared in situ by adopting nano calcium carbonate and an organic film forming substance, is a high solid content nano calcium carbonate modified silicone oil emulsion with nano particle diameter width distribution of 40-100nm and solid content of 30-40%, is suitable for demoulding in the processing process of concrete products, can well realize smooth separation of raw materials and a metal mould by isolating the raw materials from the mould, and has the advantages of excellent effect, convenient use, no pollution, safety and reliability. The problem of environmental pollution caused by using a used engine oil release agent is solved, the phenomenon that products are whitened caused by an inorganic powder isolating agent is avoided, the durability of the mold is improved, the painting times are reduced, the surface of the mold is protected, meanwhile, micro pits and damage on the surface of the mold can be repaired by introducing nano particles with wider particle size distribution (40-100 nm), the service life of the mold is prolonged, the surface defects of the products are reduced, the yield is improved, the surfaces of the mold and the products have the self-cleaning effect, and the dual effects of isolation and demolding are achieved. 2. The reagents used in the invention are all nontoxic or low toxic, and the prepared finished product of the novel concrete product isolation release agent belongs to a green product. According to the characteristics of the silicone oil emulsification process, a one-step process is adopted, namely, an emulsifier and the silicone oil are firstly prepared into W/O type microemulsion, then phase inversion is carried out to prepare the O/W type microemulsion, nano calcium carbonate is prepared in situ in the W/O type microemulsion preparation stage, then phase inversion is carried out to prepare the O/W type nano calcium carbonate silicone oil emulsion, and further the concrete product isolation release agent with the solid content of 30-40% is obtained.
Drawings
FIG. 1 is a transmission electron microscope image of an isolating release agent of a concrete product prepared in example 1 of the present invention; it can be seen that the average particle size of the nano calcium carbonate in the emulsion is: 40-100 nm.
Detailed Description
To better illustrate the invention, the following are illustrated and comparative examples:
example 1:
weighing 20 parts of silicone oil with the average viscosity of 1000cp, 20 parts of silicone oil with the average viscosity of 500cp, 8 parts of Tween-60 and 8 parts of span-60 as an emulsifier, weighing 16 parts of deionized water, weighing 2 parts of stearic acid, 8 parts of ethanol and 5 parts of anhydrous calcium chloride, preparing calcium chloride aqueous solution with the concentration of 0.5M by using the deionized water, adding the calcium chloride aqueous solution into a reaction vessel with a stirring reflux device, and stirring the calcium chloride aqueous solution into transparent solution at 45 ℃. According to the molar ratio of calcium ions to carbonate ions of 1: 1, slowly adding anhydrous sodium carbonate powder into the prepared silicon oil-calcium chloride solution under stirring, stirring while adding, adding 1 part of defoaming agent after the addition is finished, heating the system to 45-55 ℃, stirring and refluxing for 36 hours, adding deionized water, stopping heating, slowly stirring, cooling and phase inversion to obtain the silicon oil nano calcium carbonate emulsion concrete isolation release agent with the solid content of about 40%. The transmission electron microscopy determines that the average grain diameter of the nano calcium carbonate is as follows: 40-100 nm.
Example 2:
weighing 30 parts of silicone oil with the average viscosity of 1000cp, 1.5 parts of Tween-60, 1.5 parts of span-60, 0.5 part of Tween-20 and 0.5 part of span-20, weighing 8 parts of deionized water, weighing 0.8 part of ethanol, 0.2 part of polyvinyl alcohol and 0.3 part of anhydrous calcium chloride, preparing into a calcium chloride aqueous solution with the concentration of 2.5M by using the deionized water, adding the calcium chloride aqueous solution into a reactor with a stirring reflux device, and stirring the calcium chloride aqueous solution into a transparent solution at 50 ℃. Stirring to obtain a transparent solution. According to the molar ratio of calcium ions to carbonate ions of 1: 1, adding anhydrous sodium carbonate powder or 0.5M sodium carbonate aqueous solution slowly into the prepared silicon oil-calcium chloride solution under stirring, stirring while adding, adding 0.5 part of defoaming agent, heating the system to 55-65 ℃, stirring, refluxing and reacting for 24.0h, adding deionized water, stopping heating, slowly stirring, cooling and phase inversion to obtain the silicon oil nano calcium carbonate emulsion concrete isolation release agent with the solid content of about 30%. The transmission electron microscopy determines that the average grain diameter of the nano calcium carbonate is as follows: 40-100 nm.
Example 3:
weighing 35 parts of silicone oil with the average viscosity of 500cp, 7 parts of Tween 80, 7 parts of span-80, 0.5 part of Tween-20 and 0.5 part of span-20 as emulsifiers, weighing 15 parts of deionized water, weighing 3 parts of ethanol, 2 parts of stearic acid, 0.5 part of sodium stearate and 3 parts of anhydrous calcium chloride, preparing into a calcium chloride aqueous solution with the concentration of 2M by using the deionized water, adding the calcium chloride aqueous solution into a reactor with a stirring reflux device, and stirring the calcium chloride aqueous solution into a transparent solution at 50 ℃. According to the molar ratio of calcium ions to carbonate ions of 1: 1, adding anhydrous sodium carbonate powder or 2.5M sodium carbonate aqueous solution slowly into the prepared silicon oil-calcium chloride solution under stirring, stirring while adding, adding 0.8 part of defoaming agent, heating the system to 65-75 ℃, stirring, refluxing and reacting for 20.0h, adding deionized water, stopping heating, slowly stirring, cooling and phase inversion to obtain the silicon oil nano calcium carbonate emulsion concrete isolation release agent with the solid content of about 35%. The transmission electron microscopy determines that the average grain diameter of the nano calcium carbonate is as follows: 40-100 nm.
Comparative example 1:
weighing 20 parts of silicone oil with the average viscosity of 1000cp, 20 parts of silicone oil with the average viscosity of 500cp, 8 parts of Tween-60 and 8 parts of span-60 as an emulsifier, weighing 16 parts of deionized water, adding into a reaction vessel with a stirring reflux device, and stirring at 45 ℃ to obtain a transparent solution. Adding 1 part of defoaming agent, heating the system to 45-55 ℃, stirring and refluxing for reaction for 36 hours, adding deionized water, stopping heating, slowly stirring, cooling and phase inversion to obtain the silicone oil emulsion concrete isolation release agent with the solid content of about 40%.
Comparative example 2:
weighing 30 parts of silicone oil with the average viscosity of 1000cp, 1.5 parts of Tween-60, 1.5 parts of span-60, 0.5 part of Tween-20 and 0.5 part of span-20, weighing 8 parts of deionized water, adding into a reactor with a stirring reflux device, and stirring at 50 ℃ to obtain a transparent solution. And adding 0.5 part of defoaming agent, heating the system to 55-65 ℃, stirring, refluxing and reacting for 24.0h, adding deionized water, stopping heating, slowly stirring, cooling, and phase inversion to obtain the silicone oil emulsion concrete isolation release agent with the solid content of about 30%.
Comparative example 3:
weighing 35 parts of silicone oil with the average viscosity of 500cp, 7 parts of Tween 80, 7 parts of span-80, 0.5 part of Tween-20 and 0.5 part of span-20 as emulsifier, weighing 15 parts of deionized water, adding into a reactor with a stirring reflux device, and stirring at 50 ℃ to obtain a transparent solution. And adding 0.8 part of defoaming agent, heating the system to 65-75 ℃, stirring, refluxing and reacting for 20.0h, adding deionized water, stopping heating, slowly stirring, cooling, and phase inversion to obtain the silicone oil emulsion concrete isolation release agent with the solid content of about 35%.
Isolation and demolding test: the concrete molding die was used as an example, and the use effects are shown in the attached table.
Attached table:
product description:
compared with the unmodified silicone oil emulsion concrete release agent with the same formula, the nano calcium carbonate modified silicone oil emulsion concrete release agent has the advantages that the release frequency of one-time spraying is obviously improved, the cleaning period of a mould is obviously prolonged, the defective rate is obviously reduced, the storage period of the release agent is obviously prolonged, and the nano calcium carbonate modified silicone oil emulsion concrete release agent is favorable for transportation and storage. Particularly for metal molds which are to be eliminated and have the defects of micro pits and the like on the surface, because the nano calcium carbonate of the modified silicone oil emulsion concrete release agent has the average grain diameter of 40-100nm, the nano calcium carbonate with different grain diameters can repair the micro pits on the surface of the metal mold in the using process, the qualified concrete product with smooth surface is prepared, and the service life of the mold is prolonged.
Claims (3)
1. A concrete product isolation release agent is characterized in that: the preparation method comprises the following steps of:
30-40 parts of silicone oil
Modifier 1-10
Calcium chloride 0.3-5
Sodium carbonate 0.3-5
Diluent 9-55.9
Emulsifier 4- - -20
0.5-1% of defoaming agent
The modifier is selected from at least two of ethanol, polyvinyl alcohol, stearic acid and sodium salt thereof; the calcium chloride is a calcium chloride aqueous solution with the concentration of 0.5-2.5mol/L prepared by deionized water; the sodium carbonate is anhydrous sodium carbonate powder or sodium carbonate aqueous solution with the concentration of 0.5-2.5 mol/L; the diluent is deionized water; the emulsifier is at least one of tween-20, tween-60, tween-80, span-20, span-80 and span-60; the defoaming agent is a silicone oil defoaming agent;
(1) mixing and stirring silicone oil, an emulsifier, a modifier, calcium chloride and deionized water according to the proportion to prepare a silicone oil-calcium chloride solution; (2) adding anhydrous sodium carbonate powder or sodium carbonate aqueous solution slowly into the prepared silicon oil-calcium chloride solution under stirring, wherein the molar ratio of calcium ions to carbonate ions is 1: 1, adding a defoaming agent after the addition is finished, heating to 45-75 ℃, and stirring for reaction to obtain a W/O type nano calcium carbonate modified silicone oil emulsion; (3) adding deionized water, stirring, cooling and phase inversion to obtain O/W type silicone oil nano calcium carbonate emulsion.
2. The concrete release agent according to claim 1, wherein: adding a diluent to prepare the concrete product isolation release agent with the solid content of 30-40%.
3. A method of preparing the concrete product release agent of claim 1, wherein: the method is realized by the following steps:
(1) mixing and stirring silicone oil, an emulsifier, a modifier, calcium chloride and deionized water according to the proportion of claim 1 to prepare a silicone oil-calcium chloride solution; (2) slowly dripping sodium carbonate aqueous solution into the prepared silicon oil-calcium chloride solution under stirring, wherein the molar ratio of calcium ions to carbonate ions is 1: 1, adding a defoaming agent after the addition is finished, heating to 45-75 ℃, and stirring for reaction to obtain a W/O type nano calcium carbonate modified silicone oil emulsion; (3) adding deionized water, stirring, cooling and phase inversion to obtain O/W type silicone oil nano calcium carbonate emulsion;
the modifier is selected from at least two of ethanol, polyvinyl alcohol, stearic acid and sodium salt thereof; the calcium chloride is a calcium chloride aqueous solution with the concentration of 0.5-2.5mol/L prepared by deionized water; the sodium carbonate is anhydrous sodium carbonate powder or sodium carbonate aqueous solution with the concentration of 0.5-2.5 mol/L; the diluent is deionized water; the emulsifier is at least one of tween-20, tween-60, tween-80, span-20, span-80 and span-60; the defoaming agent is a silicone oil defoaming agent.
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| CN112266621B (en) * | 2020-11-09 | 2022-07-01 | 浙江巍翔科技集团有限公司 | Rubber internal mold release agent and preparation method thereof |
| CN113667527A (en) * | 2021-08-20 | 2021-11-19 | 卓链化工(上海)有限公司 | Preparation method of plastic release agent containing isoparaffin |
| CN115418260A (en) * | 2022-08-31 | 2022-12-02 | 珠海度铖材料科技有限公司 | Efficient concrete release agent for concrete products and preparation method thereof |
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| CN103042169A (en) * | 2013-01-08 | 2013-04-17 | 上海尤希路化学工业有限公司 | High-dilution-rate and environment-friendly release agent for aluminum alloy |
| CN103450995A (en) * | 2013-09-16 | 2013-12-18 | 马清浩 | Oily solid releasing agent and preparation method thereof |
| CN104479835A (en) * | 2014-12-18 | 2015-04-01 | 蒙城县科技创业服务中心 | Concrete releasing agent prepared from rapeseed oil and preparation method of concrete releasing agent |
| CN108085117A (en) * | 2017-12-13 | 2018-05-29 | 甘肃智通科技工程检测咨询有限公司 | Concrete emulsion release agents |
| CN108751695A (en) * | 2018-07-13 | 2018-11-06 | 安徽思源三轻智能制造有限公司 | A kind of glass releasing agent and preparation method thereof |
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