KR100778933B1 - Ground materials with high elasticity and durability, and manufacturing method of the ground materials, and construction method using the ground materials - Google Patents

Abstract

A floor material composition, a method for preparing the floor material composition, and a method for constructing the floor material are provided to improve elasticity and durability. A floor material composition comprises a prepolymer solution which comprises 100 wt% of 20-26 % NCO modified methylene diisocyanate as a curing agent; and a resin solution which comprises 50-60 wt% of polyether polyol having a weight average molecular weight of 3,000-5,000, 15-25 wt% of a copolymer polyol having a hydroxyl number of 25-35 KOH/g, 5-10 wt% of a chain extender, 0.1-1 wt% of a silicone antifoaming agent, 1-2 wt% of an amine catalyst, and 2-20 wt% of a foaming agent, in a ratio of 0.4-0.6 : 1.

Description

Ground materials with high elasticity and durability, and manufacturing method of the ground materials, and construction method using the ground materials}

1 is a manufacturing process of the flooring composition having a high elasticity and high durability according to the present invention.

Figure 2 is a manufacturing process of the flooring material having a high elasticity and high durability according to the present invention.

Figure 3 is a cross-sectional view of a state installed with a high elastic high durability flooring according to the invention.

[Explanation of symbols on the main parts of the drawings]

1: concrete floor 2: adhesive

3: flooring material 4: coating layer

The present invention relates to an elastic flooring material, and more particularly, to constitute a flooring composition having a high elasticity and high durability in which a prepolymer solution containing methylene diisocyanate as a main component and a resin solution containing polyether polyol as a main component are mixed at a predetermined ratio. In addition, the composition is manufactured by using an integral skin foam technique, and thus, when applied to the floor surface of a basketball court, office, hospital, hotel, school, golf course, bicycle path, jogging course, etc., it has high elasticity and high durability. In addition, the present invention relates to a flooring material having a high elasticity and high durability, and a method of manufacturing the flooring material and a construction method using the flooring material, which are not affected by the surrounding environment and season during installation, thereby providing convenience in construction.

In general, elastic flooring materials widely used in basketball courts, offices, hospitals, hotels, schools, golf courses, bicycle paths, jogging courses, etc. are widely used products using two-component urethane, urethane chips, or rubber chips. Not only is it complicated and demanding, but it is also heavily constrained by the environment and seasons.

In other words, the construction process of the elastic flooring material mainly composed of liquid-type two-component urethane is based on the base treatment, primer coating, primary intermediate coating, primary curing, secondary intermediate coating, secondary curing, top coating treatment, and tertiary curing. There is a problem of going through the complicated and cumbersome process of completing the construction by marking the line and curing the fourth.

In addition, the construction process of the elastic flooring material made of urethane chips or rubber chips may be ground treatment, primer coating, binder and rubber chip / urethane chip stirring, laying, flattening work using heat rollers, primary curing, and finishing with sealing materials. There is a problem of going through the complicated and cumbersome process of finishing the construction by treatment, top coating treatment, curing, line marking, secondary curing.

In addition, the existing elastic flooring products are accompanied by a uniform product configuration, complex construction methods and seasonal constructional constraints.

In other words, currently used products use one-component liquid binders and rubber chips, or two-component liquid products composed of a main agent and a curing agent. Additional equipment is required, and if the compounding ratio is not met, it is not possible to meet the required physical properties, so the possibility of defects after construction is high.

In addition, the process is difficult and complicated due to the multi-stage construction process, and the overall construction period is long due to the aging and hardening time of each product. Hardening is difficult and there is a problem that the probability of occurrence of defects increases.

The present invention is to solve the above problems and to constitute an elastic flooring composition having a high elasticity and high durability by mixing a prepolymer solution containing a methylene diisocyanate as a main component and a resin solution containing a polyether polyol at a predetermined ratio, The composition is manufactured by the integral skin foam technique, so that when applied to the floor surface of a basketball court, office, hospital, hotel, school, golf course, bicycle path, jogging course, etc., it has high elasticity and high durability. As a technical task, it is possible to provide convenience in construction since it is not influenced by the surrounding environment and season during installation.
The present invention determines the overall hardness, weather resistance, elongation, tensile strength and the weight average to obtain a prepolymer solution consisting of 100% by weight of 20 ~ 26% NCO modified methylene diisocyanate having a function as a curing agent, and excellent mechanical properties and stable high elastic foam 50 ~ 60wt% of polyether polyol with molecular weight of 3,000 ~ 5,000 and 25 ~ 35mg KOH / g of hydroxyl group produced by dispersing and polymerizing acrylic monomers to remove foam shrinkage and have proper elasticity, hardness and breathability. 15 to 25 wt% of polymer polyol, 5 to 10 wt% of chain extender which improves the bonding force during foaming reaction of foam, and improved dispersibility of raw materials by emulsification during foaming reaction of foam, stabilization of cell Determination of 0.1 ~ 1wt% of silicon foam stabilizer to improve emission of generated gas, crack of cell, etc., 1 ~ 2wt% of amine catalyst to form smooth workability and stable foam, and density of foam It is characterized in that the resin solution consisting of 2 to 20wt% of the blowing agent, and the prepolymer solution and the resin solution is mixed in a ratio of 0.4 ~ 0.6: 1.
In addition, the present invention is a prepolymer solution consisting of 100% by weight of 20 to 26% NCO-modified methylene diisocyanate, 50 to 60 wt% of a polyether polyol having a weight average molecular weight of 3,000 to 5,000, 15 to 25 wt% of a copolymer polyol, and chain extension The resin solution consisting of the 5-10 wt%, 0.1-1 wt% of the silicon foam stabilizer, 1-2 wt% of the amine catalyst, and 2-20 wt% of the blowing agent, and the prepolymer solution and the resin solution at a ratio of 0.4-0.6: 1. A raw material input process for injecting the mixed composition into a mold of a specific form, a curing process for aging for 5-7 minutes at a temperature of 30 ~ 50 ℃ after the raw material input process, and after the curing process to separate the foam from the mold It is characterized by consisting of a demolding step and a cutting step of cutting according to a predetermined rule after the demolding step.
In addition, the present invention is an adhesive coating process for applying a thickness of one to three adhesives selected from epoxy, urethane, hot-melt (Hot-Melt) on the concrete floor surface, and 20 to 26% NCO modified methylene diisocyanate on the adhesive A prepolymer solution composed of 100% by weight, 50 to 60 wt% of a polyether polyol having a weight average molecular weight of 3,000 to 5,000, 15 to 25 wt% of a copolymer polyol, 5 to 10 wt% of a chain extender, and 0.1 to 1 wt% of a silicone foam stabilizer And a resin solution consisting of 1 to 2 wt% of an amine catalyst and 2 to 20 wt% of a blowing agent, and a composition mixed with the prepolymer solution and the resin solution at a ratio of 0.4 to 0.6: 1 in a mold at a temperature of 30 to 50 ° C. After curing for 5 to 7 minutes, by demolding to the upper surface of the elastic flooring prepared by a predetermined rule made by attaching the elastic flooring material formed with a coating layer selected from colored spray coating or surface screen printing The features.

Hereinafter, with reference to the accompanying drawings 1 to 3, a method of manufacturing a flooring material having a high elasticity and high durability according to the present invention, a method of manufacturing the flooring material, and the flooring material are as follows.

1 is a manufacturing process diagram of a high elasticity high durability flooring composition according to the present invention, largely determines the elongation and tensile strength of the elastic flooring of the present invention and a prepolymer solution having a function as a curing agent, and the elasticity of the present invention In the flooring material, it is possible to manufacture the flooring material using an integral skin foam technique and is made of a resin solution that has high elasticity and high durability.

The prepolymer solution is composed of 20 to 26% NCO-modified methylene diisocyanate 100% by weight, and the N = C = O bond (hereinafter referred to as 'NCO') as a material that influences the physical properties such as overall hardness, weather resistance, elongation In the flooring of the present invention, 20 to 26% NCO-modified methylene diisocyanate is used.

The resin solution is a polyether polyol having a weight average molecular weight of 3,000 to 5,000 for obtaining a highly elastic epidermal integrally molded foam having excellent mechanical properties (hereinafter abbreviated as 'polyether polyol having a molecular weight of 3,000 to 5,000'). 50 to 60 wt% And 15-25 wt% of copolymer polyol to remove the shrinkage of the foamed integrally molded foam to have proper elasticity, hardness, and breathability, and to improve the bonding force during the foaming reaction of the highly elastic skin-molded foam. 5-10 wt% of Chain Extender and the expansion of the high elastic skin-integral foam, the dispersibility of the raw material components by the emulsification, the stabilization of the cell, the release of gas generated during the reaction by the reduction of the surface tension, Half of silicon surfactant 0.1 ~ 1wt% to improve cell cracking, and 1 ~ 2wt% of amine catalyst for forming smooth workability and stable epidermal molded foam After being sequentially added to the coagulation, the solution was homogenized by stirring for 20 to 30 minutes while maintaining the speed of 200 to 300 rpm, and then, by adding the blowing agent 2 to 20 wt% to determine the density of the high elastic skin integrally molded foam, the mixture was stirred at low speed for 5 minutes. By homogenizing to complete the preparation of the flooring composition having a high elasticity high durability of the present invention.

When the polyether polyol having a molecular weight of 3,000 to 5,000 is added in less than 50wt%, the tensile or hardness of the integrally molded foam is reduced, and when added in more than 60%, the elasticity becomes too high and the impact absorbency is lowered. It is preferable to add in the range.

The copolymer polyol has a hydroxyl value (OH. NO) of 25 to 35 mg KOH / g prepared by dispersing and polymerizing an acrylic monomer (Acryl Monomer), and the hydroxyl group (OH. NO) is 25 to 35 mg KOH / g. If the copolymer polyol is added at less than 15wt%, the elasticity and breathability of the epidermal integral foam cannot be obtained, and high elasticity effect cannot be obtained.When it is added at 25wt% or more, the hardness of the foam is too high, so it is within the range of 15 ~ 25wt%. It is preferred to add at.

As the chain extender, dihydric alcohol or amines are used, and when it is added below 5wt%, the crosslinking degree decreases, so cracking occurs inside the foam, and when it is added above 10wt%, the hardness of the foam is excessive. Increases.

The silicone foam stabilizers are all organosilicon copolymer-based foam stabilizers commonly used as stabilizers of the integrally molded foam, and when added to less than 0.1wt%, the epidermal body has a stable inner cell. Forming foam can not be obtained, when added in more than 1wt% can cause shrinkage of the integral skin foam due to excessive stabilization of the cell, and may decrease the activity of the catalyst, so it is added within the range of 0.1 ~ 1wt% It is desirable

The amine catalyst is used in combination of a tertiary amine catalyst consisting of triethylene diamine and bis dimethylamino ethyl ether 70wt%, dipropylene glycol 30wt% When used at less than 1wt%, the reaction is delayed and the hardening is poor, resulting in poor workability, and when added at 2wt% or more, the reaction proceeds too fast to increase the heat of reaction inside the integrally molded foam. Since there is a problem that product defects frequently occur because it is not uniformly and stably generated, it is preferable to add the product within 1 to 2wt%.

The blowing agent is water (H ₂ O), cyclo pentane (Cyclo Pentane), 1,1-dichloro-1-fluoroethane (HCFC-141b), MC (Methylene Chloride) foaming agents commonly used in foaming foam All are available.

If the foaming agent is used at less than 2wt%, the density of the skin integrally molded foam is increased, and thus the consumption of raw materials is increased, and the foam hardness is too high, resulting in a decrease in elasticity. In addition, when the foaming agent is used in excess of 20wt%, the density is lowered. It is preferable to add it within the range of 2 to 20wt% because physical properties such as the durability and strength of the foam are deteriorated and thus it has no use as a flooring material having high elasticity and durability.

The present invention is prepared by adding the prepolymer solution and the resin solution at a temperature of 20 ° C. to the reaction tank at a ratio of 0.4 to 0.6: 1 and stirring and homogenizing at 5,000 rpm for 3 to 5 seconds as described above. To complete the preparation of the flooring composition having a high elasticity and high durability according to.

In the present invention, the index of the isocyanate is preferably 0.9 to 1.2 in order to manufacture a floor material having high elasticity and high durability. Here, the isocyanate index refers to a weight ratio of a polyol having an OH group and an isocyanate having an NCO group.

That is, when the ratio of the prepolymer solution and the resin solution is 0.4 to 0.6: 1 or less, since the index of the isocyanate is 0.9 or less, the hardness of the integral skin molding foam is lowered, and the elasticity becomes excessively higher than necessary, resulting in elastic flooring. When the ratio of the prepolymer solution and the resin solution is 0.4 to 0.6: 1 or more, the isocyanate index is 1.2 or more, so that voids are formed on the surface of the integral skin molded foam, and the hardness of the foam becomes high. It is preferable to mix the prepolymer solution and the resin solution at a ratio of 0.4 to 0.6: 1 because of problems of poor elasticity and durability.

Next will be described in detail with reference to the accompanying Figure 2 the process of manufacturing the flooring of the present invention using a high elasticity durable flooring composition according to the present invention.

Figure 2 is a manufacturing process diagram of a high elastic high durability flooring according to the present invention, the prepolymer solution and the resin solution in a ratio of 0.4 ~ 0.6: 1 stirred and mixed composition to maintain a specific form and temperature in the range 30 ~ 50 ℃ After the raw material input process put into the mold to be maintained, the curing process is aged for 5 to 7 minutes, and then the mold is removed to remove the foam from the mold. In order to prevent yellowing of the flooring, to improve abrasion resistance, and to give an aesthetic effect of the appearance of the product, a color spray coating or surface printing is completed to manufacture the flooring having high elasticity and high durability according to the present invention.

If the demolding time is less than 5 minutes when demolding the integrally molded foam from the mold during the manufacturing process, the foam may expand and cause product defects. It is preferable to mature for 5-7 minutes.

 In the manufacturing process, when the mold temperature is 30 ° C. or lower, voids are formed on the surface of the integrally molded foam, and foam breakage may occur when the mold is demolded. When the mold temperature is 50 ° C. or higher, the skin layer of the foam is formed. The temperature of 30-50 degreeC is preferable because the phenomenon which becomes thin and peeling of a foam surface arises.

Next, the process of constructing a flooring material having high elasticity and high durability according to the present invention will be described in detail with reference to FIG. 3.

Figure 3 as a stage shaving in the state installed the flooring with high elasticity high durability according to the present invention. When applying to basketball courts, offices, hospitals, hotels, schools, golf courses, bicycle paths, jogging courses, etc., apply one adhesive (2) selected from epoxy, urethane, and hot-melt on the concrete floor (1). After application to a thickness of ˜3mm, the construction is completed by attaching the high-elastic, high-durability flooring material 3 of the present invention on which the coating layer 4, which is colored sprayed or printed, is formed on the surface of the adhesive 2.

When the thickness of the adhesive applied in the construction process is less than 2mm, the adhesive strength of the adhesive and the skin integrally molded foam is lowered, and when the thickness of the applied adhesive is 3mm or more, the construction price is increased and the economical efficiency is inferior. It is preferable to apply by.

Hereinafter, an embodiment of a flooring material having high elasticity and high durability according to the present invention will be described.

Composition ratios according to Examples 1 to 3 of the present invention are shown in Table 1.

First, in Examples 1 to 3, as shown in Table 1 below, the prepolymer solution was fixed with 20% NCO-modified methylene diisocyanate and the prepolymer solution and the resin solution were mixed and fixed in a ratio of 0.5: 1. The content ratio of the components constituting the was changed.

That is, in a state where the silicon foam stabilizer and the amine catalyst, which are components of the resin solution, are fixed at 0.5 wt% and 1.5 wt%, respectively, the polyether polyol having a molecular weight of 3,000 to 5,000 is changed to 40 wt%, 50 wt%, and 60 wt%. The polymer polyol was changed to 30 wt%, 20 wt%, 25 wt%, the chain extenders were changed to 10 wt%, 8 wt%, 8 wt%, and the blowing agent was changed to 18 wt%, 20 wt%, 5 wt%, respectively.

Table 1 Composition content ratios according to Examples 1 to 3

Solution ingredient Example 1 Example 2 Example 3 Mixing ratio Prepolymer Solution 20% NCO modified methylene diisocyanate 100 100 100 Prepolymer Solution: Resin Solution (0.5: 1)  Resin Solution Polyether polyol of molecular weight 3000-5000 40 50 60 Copolymer polyols 30 20 25 Chain extender 10 8 8 Silicone foam stabilizer 0.5 0.5 0.5 Amine catalyst 1.5 1.5 1.5 blowing agent 18 20 5 system 100 100 100

The composition of Examples 1 to 3 as described above was introduced into a mold maintaining a temperature of 40 ° C., and after 6 minutes, demolded from the mold, and then cut into a panel having a width and length of 50 × 50 cm and a thickness of 1.5 cm to form a density. And foam hardness, resilience, compression set were measured, and the results are shown in Table 2, and the comparative example is a comparative example of a urethane elastic flooring product mainly composed of liquid urethane of K company in Korea. Heard by.

Here, the foam density was measured by 『Weight (Kg) of skin-integral molded foam ÷ ÷ [Volume of mold (m ³ : horizontal * vertical * height)）, and the foam hardness was measured by rubber hardness tester (ASKER, a rubber and plastic hardness measuring instrument). The resilience is measured using a drop tripsometer manufactured by Wallace, UK, and the rebound height is recorded as the resilience value after the blow using the BS 903 method. Compressive permanent strain was compressed to 50% compression ratio according to ATS D 395 (ASTM D 395) and pressurized for 6 hours at 50 ℃ oven, the pressure was removed, and recovered for 30 minutes at room temperature to measure the thickness was calculated.

Table 2 Measurement Results According to Examples 1 to 3

Properties unit Example 1 Example 2 Example 3 Comparative example Foam density (Kg / m ³ ) 260 280 310 - Foam hardness (Shore A) 50 58 80 55 Resilience (BS 903: PA 8) % 48.2 59.4 39.0 51 Compression set (Compression Set) (50 ℃ * 6hrs * 50%) % 4.5 6.5 10.8 20

When compared with the comparative example as shown in Table 2, it can be seen that Example 2 represents a flooring material having a high elasticity and high durability.

Next, the composition content ratios according to Examples 4 to 6 of the present invention are shown in Table 3.

In Examples 4 to 6, the NCO content of the prepolymer solution was changed to 22%, 24%, and 26%, respectively, in the state of being fixed to the component content of the composition of the resin solution obtained in Example 2, and the prepolymer solution and the resin solution The mixing ratios of 0.4: 1, 0.5: 1, and 0.6: 1 are shown in Table 3, respectively.

TABLE 3 Composition content ratios according to Examples 4-6.

Solution ingredient Example 4 Example 5 Example 6 Prepolymer Solution  NCO modified methylene diisocyanate NCO content NCO content NCO content 22% 24% 26%  Resin Solution Polyether polyol of molecular weight 3000-5000 50 50 50 Copolymer polyols 20 20 20 Chain extender 8 8 8 Silicone foam stabilizer 0.5 0.5 0.5 Amine catalyst 1.5 1.5 1.5 blowing agent 20.0 20.0 20.0 system 100 100 100 Prepolymer solution: mixing ratio of resin solution 0.4: 1 0.5: 1 0.6: 1

The composition of Examples 4 to 6 as described above was introduced into a mold maintaining a temperature of 40 ° C., after 6 minutes, demolded from the mold, and then cut into a panel having a width and length of 50 × 50 cm and a thickness of 1.5 cm to form a foam density. And, foam hardness, rebound elasticity, compression set was measured, the results are shown in Table 4.

Table 4 Measurement results according to Examples 4 to 6

Properties unit Example 4 Example 5 Example 6 Comparative example Foam density (Kg / m ³ ) 280 280 280 - Foam hardness (Shore A) 60 65 70 55 Resilience (BS 903: PA 8) % 59.7 56.9 51 51 Compression set (50 * 6hrs * 50%) % 6.4 3.8 3.7 20

As shown in Table 4, it can be seen that Examples 4 to 6 of the present invention are significantly higher in resilience and compression set than in Comparative Examples, and among them, Example 5 represents a flooring material having high elasticity and high durability. Could.

As described above, the present invention can be used as an elastic flooring material, which is an integral skin molded foam molded in a mold using the above-mentioned raw materials, and after applying an adhesive on the concrete surface for 2 to 3 mm, a colored spray coating or surface is applied to the top surface of the foam. Since the construction is completed by simply adhering the selected elastic foam during the printing process, the construction is remarkably simpler than the conventional elastic flooring products as it is not affected by the season.

As described above, the present invention constitutes a flooring composition having a high elasticity and high durability in which a prepolymer solution containing methylene diisocyanate as a main component and a resin solution containing polyether polyol as a main component are mixed at a predetermined ratio, and the composition is coated on the skin. Manufactured by the integral skin foam technique, it has high elasticity and high durability when installed on the floor of basketball court, office, hospital, hotel, school, golf course, bicycle path, jogging course, etc. Will not be affected by the environment and seasons will have the effect of providing convenience in construction.

Claims (4)

A prepolymer solution composed of 100% by weight of 20-26% NCO-modified methylene diisocyanate, which determines the overall hardness, weather resistance, elongation and tensile strength, and has a function as a curing agent; 50 ~ 60wt% of polyetherpolyol with a weight average molecular weight of 3,000 ~ 5,000 to obtain excellent mechanical properties and stable high elasticity foam, and eliminates shrinkage of foam during foaming, and disperses and polymerizes acrylic monomer with proper elasticity, hardness and breathability. 15 to 25 wt% of copolymer polyol having a hydroxyl group of 25 to 35 mg KOH / g, 5 to 10 wt% of a chain extender to improve the binding force during the foaming reaction of the foam, and a raw material by emulsification during the foaming reaction of the foam 0.1 ~ 1wt% silicone foam stabilizer to improve component dispersibility, stabilize cell, release gas during reaction, breakage of cell, etc., and 1 ~ 2wt amine catalyst to form smooth workability and stable foam %, And a resin solution composed of 2 to 20 wt% of a blowing agent for determining the density of the foam, A flooring composition having high elasticity and high durability, characterized in that the mixture of the prepolymer solution and the resin solution in a ratio of 0.4 ~ 0.6: 1. A prepolymer solution consisting of 100% by weight of 20 to 26% NCO-modified methylene diisocyanate, 50 to 60 wt% of a polyetherpolyol having a weight average molecular weight of 3,000 to 5,000, 15 to 25 wt% of a copolymer polyol, and 5 to 10 wt% of a chain extender. And a resin solution comprising 0.1 to 1 wt% of a silicon foam stabilizer, 1 to 2 wt% of an amine catalyst, and 2 to 20 wt% of a blowing agent, and a composition in which the prepolymer solution and the resin solution are mixed in a ratio of 0.4 to 0.6: 1. A raw material input process into the mold of the shape, After the raw material input process, the curing process for aging for 5-7 minutes at a temperature of 30 ~ 50 ℃, After the curing step, the demolding step of separating the foam from the mold, After the demolding process, a method of manufacturing a flooring material having a high elasticity and high durability characterized in that the cutting process is cut to a predetermined rule. The method of manufacturing a flooring material having high elasticity and high durability according to claim 2, wherein a coating layer selected from colored spray coating and screen printing is formed on the upper surface of the elastic flooring material. An adhesive coating process of applying one or more adhesives selected from epoxy, urethane, and hot-melt to a thickness of 2-3 mm on the concrete floor; A prepolymer solution consisting of 100% by weight of 20-26% NCO-modified methylene diisocyanate on the adhesive, 50-60 wt% of a polyetherpolyol having a weight average molecular weight of 3,000-5,000, 15-25 wt% of a copolymer polyol, and a chain extender 5 10 wt%, 0.1-1 wt% of the silicon foam stabilizer, 1-2 wt% of the amine catalyst, and 2-20 wt% of the blowing agent, and the prepolymer solution and the resin solution were mixed in a ratio of 0.4-0.6: 1. After the composition was put into a mold and cured at a temperature of 30 to 50 ° C. for 5 to 7 minutes, the mold was demolded and cut to a predetermined rule to form a coating layer selected from colored spray coating or surface screen printing. A method of constructing a flooring material having high elasticity and high durability, characterized by attaching an elastic flooring material.

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