KR102163940B1 - Environment-friendly water based concrete form release agent and method for manufacturing the same - Google Patents

Abstract

According to the present invention, an environment-friendly water-soluble concrete releasing agent comprises: 35-40 parts by weight of paraffin oil; 2-7 parts by weight of oxidized polyethylene wax; 35-45 parts by weight of water; and emulsifier of the paraffin oil, a surfactant for dispersion, and an additive for defoaming. Accordingly, the environment-friendly water-soluble concrete releasing agent is attached to a surface of a mold to form a coating layer having excellent water resistance and releasing ability, thereby preventing occurrence of sediment and minimizing occurrence of environmental pollution.

Description

Eco-friendly water-based concrete release agent and its manufacturing method {ENVIRONMENT-FRIENDLY WATER BASED CONCRETE FORM RELEASE AGENT AND METHOD FOR MANUFACTURING THE SAME}

The present invention relates to an eco-friendly water-based concrete release agent and a method of manufacturing the same.

Concrete, one of the most commonly used materials in the field of architecture, is a mixture of cement, water, sand, gravel, and admixtures. In order to make a finished structure, a form, which is a frame that supports the pre-hardened concrete, is used. The formwork is removed when the concrete is cured. A release agent is a coating agent applied to the surface of a form in order to reduce the adhesion of the formwork and concrete to facilitate the demolding of the formwork and to increase reusability. The selection of the release agent is made according to the conditions such as the type of formwork and concrete, the method of placing the concrete, and the specifications of the finishing work.

The release agent is largely divided into oily and water-based. Of these, oily releasers have been used for a long time due to excellent deformability of the form, little difference in quality depending on the lapse of time or application location, and easy to check because the application is clear. come. However, the oily release agent has a problem of contaminating the environment and soil, along with the disadvantage of lowering the concrete surface by the residual emulsion component and lowering the adhesion with other finishing materials, and strict regulations on its use are being enforced. It is gradually becoming an aqueous release agent.

An aqueous release agent is a mixture of an oil component in water and a component to improve the peeling properties, and is used in the field by mixing with water. The peeling component included in the aqueous peeling agent is generally mixed with water in the form of an emulsion. These water-based release agents have the advantage of improving the surface quality of concrete and reducing environmental pollution compared to oil-based release agents, but have disadvantages such as poor peeling performance due to non-uniform coating quality, or deposits during storage.

*Prior patent literature

Korean Patent Registration No. 10-1376161 (registered on March 13, 2014)

Korean Patent Application Publication No. 10-2016-0004982 (published on January 13, 2016)

International Patent Publication No. WO/2018/174560 (published on September 27, 2018)

It is an object of the present invention to provide an eco-friendly water-based concrete release agent and a method of manufacturing the same, which can improve the concrete peeling state and surface quality while improving the stability without occurrence of sediment.

The eco-friendly aqueous concrete release agent related to the present invention is a release agent that can be diluted in water and used, wherein the release agent includes 30 to 45 parts by weight of paraffin oil; 2 to 7 parts by weight of Oxidized Polyethylene wax; 35 to 45 parts by weight of water; And an emulsifier of the paraffin oil, a surfactant for dispersion, and an additive for defoaming.

As an example related to the present invention, the emulsifier of paraffin oil is polyoxyethylene stearyl ether, and may contain 2 to 7 parts by weight.

As an example related to the present invention, the surfactant is tridecyl alcohol ether, and may contain 3 to 6 parts by weight.

As an example related to the present invention, the additive is polydimethylsiloxane and may contain 1 to 3 parts by weight.

As an example related to the present invention, the eco-friendly aqueous concrete release agent may further contain 3 to 5 parts by weight of lauryl alcohol.

The method of manufacturing an eco-friendly aqueous concrete release agent related to the present invention includes the steps of adding paraffin oil to a stirrer and heating it; Adding a predetermined amount of polyoxyethylene stearyl ether when the paraffin oil reaches a first reference temperature, heating and stirring; Adding a predetermined amount of oxidized polyethylene wax when the paraffin oil reaches a second reference temperature, heating and stirring; And when the oxidized polyethylene wax reaches a third reference temperature in which the entire amount of the oxidized polyethylene wax is melted, the additive and water are sequentially added and stirred.

As an example related to the present invention, when the total amount of the oxidized polyethylene wax reaches the third reference temperature, the stirring speed of the step of sequentially adding and stirring the additive and water may be agitation higher than the stirring speed of the previous steps.

As an example related to the present invention, the first reference temperature may be 20 to 30 °C, the second reference temperature may be 60 to 80 °C, and the third reference temperature may be in the range of 90 to 110 °C.

As an example related to the present invention, in the step of adding paraffin oil to the stirrer and heating, the paraffin oil may have a viscosity range of 30 to 75 cs.

As an example related to the present invention, the additive is polydimethylsiloxane and may have a viscosity in the range of 80 to 120 cs.

As an example related to the present invention, the paraffin oil is 30 to 45 parts by weight, the oxidized polyethylene wax is 2 to 7 parts by weight, the polyoxyethylene stearyl ether is 2 to 7 parts by weight, the water is 35 to 45 parts by weight It can be wealth.

As an example related to the present invention, the additive includes 3 to 6 parts by weight of tridecyl alcohol ether; 3 to 5 parts by weight of lauryl alcohol; And 1 to 3 parts by weight of polydimethylsiloxane.

According to the eco-friendly water-based concrete release agent related to the present invention, it is possible to form a coating layer having excellent water resistance and releasability by using an oxidized polyethylene wax, an emulsifier, a surfactant, and an additive that can be mixed with paraffin oil. There is no occurrence of this, and the induction of environmental pollution can be minimized.

According to the manufacturing method of the eco-friendly water-based concrete release agent related to the present invention, it is possible to secure the stability and mass production of the emulsion through the flow paraffin, the emulsifier, and the order of addition and heating conditions as the compounding components.

Hereinafter, the eco-friendly water-based concrete release agent related to the present invention and a method of manufacturing the same will be described in detail.

The eco-friendly aqueous concrete release agent related to the present invention includes paraffin oil, water, an emulsifier exclusively for paraffin oil, and oxidized polyethylene wax, and may include surfactants, silicone oils, etc. as additives.

In the present invention, paraffin oil is a solvent that is harmless to the human body and may be used in an amount of 35 to 40 parts by weight of the total weight. Paraffin oil acts as a lubricating agent, which is the basis of the release agent. As a solvent, uncontaminated tap water and groundwater are used as a solvent, and 35 to 45 parts by weight of the total weight are used.

Oxidized polyethylene wax (Oxidized Polyethylene Wax) uses 2 to 7 parts by weight of the total weight. Oxidized polyethylene wax melts in paraffin oil and becomes liquefied, adheres to the surface of the mold to form a coating layer, and exhibits excellent water resistance and releasability.

As an emulsifier for paraffin oil, 2 to 7 parts by weight of polyoxyethylene stearyl ether, which is a nonionic surfactant, is used. Polyoxyethylene stearyl ether acts as an emulsification and subsequent stabilization of liquid paraffin and water.

As another surfactant, 3 to 6 parts by weight of the total weight of tridecyl alcohol ether, an eco-friendly biodegradable surfactant, may be used. Tridecyl alcohol ether acts as a dispersion and then stabilizing.

Additionally, as an emulsion stabilizer, lauryl alcohol (Dodecyl alcohol) may be used. Lauryl alcohol is used in 3 to 6 parts by weight and has an emulsifying and thickening effect.

As another additive in connection with the present invention, silicone oil can be used. Specifically, the silicone oil is polydimethylsiloxane, and 1 to 3 parts by weight may be added. Polydimethylsiloxane is used as a water repellent and antifoaming agent

Such a constituent material can be manufactured through the following process.

First, 35 to 40 parts by weight of paraffin oil is heated. Paraffin oil can be used in a viscosity range of 30 ~ 75 cs.

When the temperature of the paraffin oil reaches the first reference temperature (20 ~ 30 ℃), 2 ~ 7 parts by weight of an emulsifier for paraffin oil (polyoxyethylene stearyl ether) is added.

When the paraffin oil is heated while polyoxyethylene stearyl ether is added and the temperature reaches the second reference temperature (60 ~ 80 ℃), 2 ~ 7 parts by weight of oxidized polyethylene wax is added and the third reference temperature (90 ~ 110 ℃) Heat until it reaches to, and check that the entire amount of the oxidized polyethylene wax is dissolved.

The heating and stirring process of the paraffin oil, polyoxyethylene stearyl ether and oxidized polyethylene wax may be carried out at a rotation speed of 100 rpm.

When the entire amount of the oxidized polyethylene wax is dissolved, the remaining additives may be added and stirred at a rotation speed of 350 rpm for 30 minutes or more. The additive may be at least one of 3 to 6 parts by weight of tridecyl alcohol ether, 3 to 5 parts by weight of lauryl alcohol, and 1 to 3 parts by weight of polydimethylsiloxane. Polydimethylsiloxane can use a viscosity range of 80 ~ 120 cs.

Finally, 35 to 45 parts by weight of water may be added and stirred at a rotational speed of 350 rpm for 30 minutes or more to complete the release agent. The manufactured eco-friendly water-based concrete release agent can be diluted 5 to 6 times in water and applied to the formwork. These release agents have a stable peeling performance and do not generate deposits due to storage.

Hereinafter, test results according to various manufacturing of the eco-friendly water-based concrete release agent related to the present invention will be described.

[Example 1]

40 g of polyoxyethylene stearyl ether was added while 400 g of paraffin oil having a viscosity of 50 cs was heated to 25°C. Thereafter, the paraffin oil mixture was heated to 70°C, 40 g of oxidized polyethylene wax was added, and heated to 100°C so that the oxidized polyethylene wax could be completely dissolved. The rotation speed of the stirrer was increased from 100 to 350, and 40 g of lauryl alcohol, 20 g of polydimethylsiloxane, and 50 g of tridecyl alcohol ether were added, followed by stirring for 30 minutes or more. Finally, 400 g of water was added to the mixture and stirred at 350 revolutions. After a certain period of time has elapsed after applying the prepared release agent to the mold, the existing aqueous release agent (comparative release agent 1) and oil-based release agent (comparative release agent 2) and the peeling state, surface quality and air bubbles were evaluated, and the presence of sediment was observed. I did.

Manufactured aqueous release agent
(Example 1) Comparable release agent 1 Comparative target peeling agent 2 Peeling state Great Inadequate Great Surface quality Great usually usually bubble Great usually usually Whether there is sediment Not found Sediment observed Not found

As shown in Table 1, the prepared aqueous release agent was excellent in the peeling state of the formwork during demolding, the quality of the demolded concrete surface, and the presence of air bubbles, and no precipitate was found.

[Example 2]

In a state where 400 g of paraffin oil having a viscosity of 75 cs was heated to 25° C., 39 g of polyoxyethylene stearyl ether was added. Thereafter, the paraffin oil mixture was heated to 75° C., and 38 g of oxidized polyethylene wax was added, followed by heating to 100° C. 38 g of lauryl alcohol, 20 g of polydimethylsiloxane, 40 g of tridecyl alcohol ether, and 400 g of water were added, followed by stirring at 400 rotational speed. The prepared releasing agent was excellent in terms of delamination state, concrete surface quality and air bubbles, and no sediment was found.

[Example 3]

While 400 g of paraffin oil was heated to 25° C., 30 g of polyoxyethylene stearyl ether was added. Thereafter, the paraffin oil mixture was heated to 75° C., 30 g of oxidized polyethylene wax was added, and heated to 100° C. 35 g of lauryl alcohol, 20 g of polydimethylsiloxane, 40 g of tridecyl alcohol ether, and 400 g of water were added and stirred. The prepared release agent was excellent in terms of peeling state, concrete surface quality, and air bubbles, but a small amount of sediment was found.

[Example 4]

In a state where 350 g of paraffin oil was heated to 25° C., 60 g of polyoxyethylene stearyl ether was added. Thereafter, the paraffin oil mixture was heated to 75° C., 40 g of oxidized polyethylene wax was added, and heated to 100° C. 35 g of lauryl alcohol, 20 g of polydimethylsiloxane, 40 g of tridecyl alcohol ether, and 400 g of water were added and stirred. The prepared release agent was excellent in the peeling state and the quality of the concrete surface, but bubbles were found.

[Example 5]

In a state where 350 g of paraffin oil was heated to 25° C., 50 g of polyoxyethylene stearyl ether was added. Thereafter, the paraffin oil mixture was heated to 75° C., and 38 g of oxidized polyethylene wax was added, followed by heating to 100° C. 38 g of lauryl alcohol, 20 g of polydimethylsiloxane, 45 g of tridecyl alcohol ether, and 400 g of water were added. The stirring conditions were maintained the same as in the previous examples. The prepared releasing agent was excellent in terms of delamination state, concrete surface quality and air bubbles, and no sediment was found.

Table 2 shows the results of the combination of the composition ratio of the eco-friendly water-based concrete release agent related to the present invention in various forms unlike the previous example.

Example 6 Example 7 Example 8 Example 9 Example 10 Example 11 Example 12 Paraffin oil 350 350 400 400 450 450 500 Polyoxyethylene stearyl ether 15 15 30 30 40 40 50 Oxidized polyethylene wax 70 60 50 40 30 20 10 Lauryl alcohol 40 40 35 35 30 30 20 Polydimethylsiloxane 15 15 15 20 20 20 20 Tridecyl alcohol ether 60 55 50 45 40 35 30 water 500 450 400 400 350 350 300 Peeling state usually Good Good Good Good Good usually Surface quality usually usually Good Good Good Good usually bubble Good Good Good Good Good usually Bad precipitate none none none none Small amount found Small amount found Small amount found

The eco-friendly water-based concrete release agent prepared as described above has a performance similar to that of an oil-based release agent, but does not generate sediment, and has an advantage of excellent utility because there is little harm to the human body and the environment.

The configuration and method of the described embodiments are not limited to the eco-friendly water-based concrete release agent described above and a method of manufacturing the same. The above embodiments may be configured by selectively combining all or part of each of the embodiments so that various modifications can be made.

Claims (12)

As a release agent that can be used after being diluted in water, the release agent,
30 to 45 parts by weight of paraffin oil;
2 to 7 parts by weight of Oxidized Polyethylene wax;
35 to 45 parts by weight of water;
3 to 5 parts by weight of lauryl alcohol; And
Including the emulsifier of the paraffin oil, a surfactant for dispersion and an additive for defoaming,
The emulsifier of the paraffin oil is polyoxyethylene stearyl ether, and contains 2 to 7 parts by weight,
The surfactant is tridecyl alcohol ether, and contains 3 to 6 parts by weight,
The additive is a polydimethylsiloxane (Dimethylpolysiloxane), containing 1 to 3 parts by weight, eco-friendly aqueous concrete release agent.
delete delete delete delete Adding paraffin oil to a stirrer and heating;
Adding a predetermined amount of polyoxyethylene stearyl ether when the paraffin oil reaches a first reference temperature, heating and stirring;
Adding a predetermined amount of oxidized polyethylene wax when the paraffin oil reaches a second reference temperature, heating and stirring; And
Including the step of sequentially adding and stirring the additive and water when the oxidized polyethylene wax reaches a third reference temperature in which the entire amount is dissolved,
The paraffin oil is ~ 45 parts by weight,
The oxidized polyethylene wax is 2 to 7 parts by weight,
The polyoxyethylene stearyl ether is 2 to 7 parts by weight,
The water contains 35 to 45 parts by weight,
The additive,
3 to 6 parts by weight of tridecyl alcohol ether,
3 to 5 parts by weight of lauryl alcohol,
A method for producing an eco-friendly aqueous concrete release agent containing 1 to 3 parts by weight of polydimethylsiloxane.
The method of claim 6,
When the oxidized polyethylene wax reaches the third reference temperature in which the entire amount is dissolved, the stirring speed of the step of sequentially adding and stirring the additive and water is stirred higher than the stirring speed of the previous steps.
The method of claim 6,
The first reference temperature is 20 ~ 30 ℃,
The second reference temperature is 60 ~ 80 ℃,
The third reference temperature is in the range of 90 ~ 110 ℃, the manufacturing method of the eco-friendly water-based concrete release agent.
The method of claim 6,
In the step of adding paraffin oil to the stirrer and heating,
The paraffin oil is a viscosity range of 30 ~ 75 cs, a method of manufacturing an eco-friendly aqueous concrete release agent.
The method of claim 6,
The additive is a polydimethylsiloxane (Dimethylpolysiloxane), a viscosity range of 80 ~ 120 cs, a method for producing an eco-friendly aqueous concrete release agent.
delete delete