KR100332543B1 - Water-soluble Repellent, Waterproof and Anti-dewing Agent Produced by Silicon Emulsion and Method for Making the Same - Google Patents

Abstract

PURPOSE: Provided is a silicone emulsion aqueous water-repellent, waterproof, dew condensation inhibitor excellent in weather resistance, endurance, and stability, which is not harmful to human bodies and dose not cause environmental pollution and can be used for cement, concrete, and brick of engineering and construction. CONSTITUTION: The silicone emulsion aqueous water-repellent, waterproof, dew condensation inhibitor is produced by a process comprising the steps of: adding 1wt% of 0.1-5mmole% chloroplatinic acid solution as a hydrosilylation catalyst to a mixture of 80-98wt% of an alkyl alkoxy silane and 1-20wt% of silica and reacting at 80-90deg.C for 2-10 hours to produce a compound; mixing 15-20wt% of the compound, 5-10wt% of a silicone resin, 4-10wt% of a non-ionic emulsifier, and water, wherein the total is 100wt%, and then stirring at 2000-5000rpm to emulsify.

Description

Water-Soluble Repellent, Waterproof and Anti-dewing Agent Produced by Silicon Emulsion and Method for Making the Same

The present invention relates to a silicone emulsion water-based water repellent, waterproof and condensation preventing agent and a method for producing the same, which are used in structures such as cement, concrete, brick, and the like for building and civil engineering. More specifically, chloroplatinic acid is added to a mixture of alkoxy silane and silica. A silicone emulsion aqueous water repellent, waterproof and dew condensation inhibitor prepared by adding a hydrosilylation catalyst to prepare a compound, mixing and stirring the compound with an organocyclic polysiloxane (silicone resin), a nonionic emulsifier, and water, and a method for preparing the compound. The silicone compound has excellent weather resistance, chemical stability, water repellency, and the like, and is used in large amounts as a treatment agent for glass fibers, a water repellent agent for construction works, an absorbent agent, and a water repellent agent for fibers. In addition, silicone compounds have been widely used in industrial fields as resin modifiers, ceramic raw materials, inorganic surface modifiers, silylating agents in the synthesis of pesticides, and the like, by utilizing various unique properties of the compounds. When used as a water repellent and waterproofing agent for civil engineering, it is common to dilute it with an organic solvent. Especially, alkyl alkoxy silane has been widely used for a long time since it is diluted in organic solvent as water repellent, waterproof and absorbent waterproofing agent for construction, civil engineering, etc. That is, conventional water repellents for building and civil engineering using silicone compounds have been used after diluting them in organic solvents such as toluene, xylene, benzene, industrial gasoline, kerosene and the like. However, these organic solvent type silicone water repellents are limited due to their high pollution due to the characteristics of organic solvents used as diluents, highly flammable, and also toxic and harmful to the human body. In some cases, isopropyl alcohol, which has a relatively low toxicity, may be used as a diluting solvent. However, this is uneconomical due to the cost increase, and the evaporation rate is too fast to easily penetrate the substrate such as concrete and brick. There is a drawback to this. In addition, although a low volatility solvent may be used, it has a problem in that the coated surface becomes wet and the drying condition is bad. Above all, organic solvent type water repellents cannot be applied to concrete and brick surfaces that are wet with water. On the other hand, water-soluble water repellents include methylsiliconate type in which a large amount of NaOH is reacted with a hydrolyzate of CH ₃ SiCl ₃ (methyltrichloro silane). In other words, when reacted with monomethylsiloxane and concentrated alkaline solution, depolymerization occurs to produce water and soluble siliconates. This water repellent has the advantage of being able to be applied even if the base material is somewhat moist. However, compared to the organic solvent-type water repellent, the water repellency and waterproof performance are remarkably poor, so that the weather resistance is weak and the alkalinity is too strong. In particular, it is cumbersome to wear protective equipment during work to avoid contact with skin, eyes, clothing, etc., and whitening may occur after application, so careful care is required when constructing. In addition, in case of contact with eyes or skin, it should be washed out with plenty of water and diagnosed by a doctor.In order to solve the above problems, in order to use alkyl alkoxy silane as an immersion absorber, water repellent and condensation inhibitor for concrete and brick, Or, it is ideal to make it an aqueous dispersion, but it is true that alkyl alkoxy silanes are hydrolyzable and susceptible to continuous condensation reactions, which makes it very difficult to have them in a stable dispersion in water. It has been reported how to hydrolyze hydrolyzable silicon compounds such as alkyl alkoxy silanes using. However, this method requires the use of relatively large amounts of nonionic emulsifiers to actually produce stable aqueous emulsions. Although nonionic emulsifiers are those that can stably disperse alkyl alkoxy silanes in water, they remain on the substrate surface after drying. Therefore, if a large amount is added to stabilize the emulsion composition, the hydrophilicity is increased on the surface of the substrate after drying, and thus durability and water repellency are deteriorated in the long term. In consideration of the balance and permeability such as stability and stability, a combination of the type and amount of emulsifier must be appropriately selected. In addition, it is relatively expensive to penetrate deeply into concrete spheres to achieve water repellent, waterproof and condensation prevention performance. Long chain alkyl alkoxy silane Although it should be used, it is economically disadvantageous as a result of cost increase as a whole. Alkoxy alkoxy silanes are generally compounds represented by the chemical structure of R _n Si (OR ′) _4-n produced by alkoxylation of chloro silanes. In the above formula, the R group is a hydrophobic hydrocarbon group, and typical examples thereof include a methyl group and a phenol group. In addition, OR 'is hydrolyzed by the hydrolyzable alkoxy group in water, moisture in the air, and moisture adsorbed on the surface of the inorganic material to produce silanol (Si-OH). At this time, the rate of hydrolysis is further promoted by the presence of a trace amount of acid or base. In addition, silanol forms an oxane bond (Si-OM) between the inorganic material surface (M-OH) and the inorganic material. Generally, higher alkyl silanol having a higher carbon number of R group has a higher hydrophobicity. Hydrolysis rate is slow. By using these properties, the alkoxy silane has been widely applied especially in the field of modifying the surface of the inorganic material, that is, water repellency, dispersibility, permeability, wear resistance and anti-agglomeration.

In order to solve the problems of the prior art as described above, the inventors of the present invention, after many years of research, have a low price, excellent weather resistance, durability, water repellency, water resistance, and dew condensation performance, are harmless to the human body, and have no pollution problems. ㆍ Development of anti-condensation agent for the first time in Korea SUMMARY OF THE INVENTION The present invention provides an aqueous water repellent, waterproof and anti-condensation agent and a method for producing the same. The present invention is prepared by adding chloroplatinic acid as a hydrosilylation agent to a mixture of alkoxy silane and silica to prepare a compound, and the compound and silicone resin, nonionic Aqueous silicone emulsion formed by mixing and stirring an emulsifier and water It is intended to provide a water, waterproof, and anti-condensation agent and a method for producing the same. The silicon used in the present invention has a low molecular weight and penetrates deeply into the sphere through the capillary of the coated concrete sphere (hydrolysis) and reacts with moisture in the sphere. At the same time, it combines with the free hydroxyl group (Si-OH) of the concrete concrete structure to form a net structure and bonds and hardens in the sphere by chemical reaction to form a solid film, so that the integrity of water-repellent and waterproof layer is excellent. To form a film.

The silicone emulsion aqueous water repellent, water repellent, and anti-condensation agent is characterized in that it is composed of a compound prepared by adding chloroplatinic acid as a hydrosilylation catalyst to a mixture of alkyl alkoxy silane and silica, a silicone resin, a nonionic emulsifier, and water. The method for producing the aqueous silicone water-repellent, water-repellent, and anti-condensation agent of the invention is 0.1 to 5 mmol (mm mole)% of chloride as a hydrosilylation catalyst in a mixture of 80 to 98% by weight of alkyl alkoxy silane and 1 to 20% by weight of silica. 1 wt% of a platinum acid solution was added and reacted at a temperature of 80-90 ° C. for 2 to 10 hours to prepare a compound.The compound was 15-20 wt%, silicone resin 5-10 wt%, and nonionic emulsifier 4-10 wt%. It is characterized by adding water to the mixture so that the total amount is 100% by weight, and stirring the mixture at 2000 rpm to 5000 rpm to give an emulsion. Hereinafter, the silicone emulsion according to the present invention will be described. The water-repellent, water-repellent, anti-condensation agent and the method for producing the same will be described in detail. [Production of Compound] The alkyl alkoxy silane used in the preparation of the compound according to the present invention includes tripropoxysilane, triethoxysilane, trimethoxysilane, Methyl diethoxysilane, methyldimethoxysilane, etc. are mentioned, It is preferable to use a trimethoxysilane. The methoxy group of the long-chain alkyl trimethoxysilane synthesize | combined with a trimethoxysilane is unstable under alkaline conditions, and since Bonding or crosslinking is liable to occur on the surface of the substrate prior to penetration. Further, alkoxy groups of carbon chains of more than a propoxyl group are relatively stable, but the bonding with the substrate is slow even if the substrate penetrates into the substrate. As silica fillers, any of dry silica and wet silica may be used. Preferably, finely divided silica is used. As fine powder silica, for example, precipitated silica, silica gel, fume silica, or treated silica whose surface is treated with a silyl group, and the like, specifically, atosyl, naphsyl, Capsyl, Sandsyl (trade name above), etc. These fine powder silicas preferably have a specific surface area of 200 m 2 / g to 300 m 2 / g measured by the BET method (BET method). Alkoxy alkoxy silane 80 to 98% by weight of the alkyl alkoxy silane and 1 to 20% by weight of the fine powder silica are suitable for the blending of the fine powder and the fine powder silica. If the blended amount of the fine powder is less than 1% by weight, the performance, that is, filling and water repellency, water repellent for the waterproofing agent, The waterproof and condensation prevention performance cannot be sufficiently exhibited. If it exceeds 20% by weight, the viscosity of the compound increases, resulting in poor workability and permeability, resulting in performance deterioration. Compounds are prepared by mixing a predetermined amount of silane and silica, adding 1% by weight of a chloroplatinic acid solution as a hydrosilylation catalyst, and heating and reacting at 80 to 90 ° C. for 2 to 10 hours in an airtight container to prepare a compound. In the hydrophobic (hydrogenation) of the surface of the silica fine particles, the hydroxyl group (-OH) on the surface of the silica fine particles reacts with the alkyl-substituted silane and the hydrophobic alkyl silyl group (-Si-R) is bonded to the surface of the silica fine particles, which is -O-Si. Thus, the compound is excellent in water repellency because the hydrophobic -O-Si-R group is formed on the surface of the silica fine particles as described above. The anti-condensation agent can achieve excellent water repellent, waterproof and anti-condensation performance. In the present invention, as a catalyst used in the hydrosilylation reaction in preparing the compound, Transition metal catalysts and radical initiators may be used. As the transition metal catalyst, transition metal complexes or halogen compounds such as cobalt, rhodium, palladium, platinum, or nigel may be used, and as a bisiso-isobutyronitrile as a radical initiator, (AIBN) benzoyl peroxide, di-t-butyl peroxide, perbenzoic acid T-butyl, and the like. In view of stability, reaction efficiency, economics and reaction conditions, chloroplatinic acid, in particular chloroplatinic acid, which is widely used industrially Hexahydrate is preferred. For example, when chloroplatinic acid is used, the amount of catalyst can be reacted by adding any amount. However, it is preferable to use as little as possible considering both economical and hygienic aspects. Preferably, 1 wt% of 0.1-5 mmol% chloroplatinic acid hexahydrate solution is added and heated at 90 ° C. for 2-10 hours to prepare a compound having hydrosilylation on the silica surface. [Silicone Resin] Methyltrichloro Silanes, methyldichlorosilanes, dimethyldichlorosilanes, trimethylchlorosilanes, phenoltrichlorosilanes, phenoldichlorosilanes, and the like have typical structures as the representative organosilicon compound monomers: R _a SiX _4-a a = 0 to 3 (a is an integer) Examples of the reaction of a hydrolyzable group chlorosilane, such as organic groups X: Cl, -OCH ₃ , OC ₂ H _5, such as R: H or -CH ₃ , -C ₆ H ₅ , and the like. The silane reacts easily with a compound having an active hydrogen such as alcohol or water to produce silanol (Si-OH), and becomes a cyclic organosiloxane (silicone resin) through condensation dehydration, washing with water, and neutralization. . In the case of silicone resins, when hydrolyzed siloxane is heated in the presence of a catalyst in solution, an equilibrium reaction occurs and the silanol group is reduced to a cyclic polymer. If the reaction is continued, the silanol groups are almost eliminated and it is difficult to thermally cure. Generally, the dendritic siloxane condenses and gels when the molecular weight is increased, but even when heated in the presence of a catalyst in the solution even on the gel, depolymerization This results in soluble low molecular weight siloxanes. This reaction varies in complexity depending on the reactive solution concentration of the monomer or the amount of catalyst, i.e. generally Q units: SiO ₂ units T units: monomethylsiloxane units CH ₃ SiO _3/2 D units: dimethylsiloxane units (CH ₃ ) ₂ SiOM Unit: Trimethylsiloxane Unit (CH ₃ ) ₃ SiO _1/2 D 'Unit: Diphenolsiloxane Unit (C ₆ H ₅ ) ₂ SiOT' Unit: Monophenolsiloxane Unit C ₆ H ₅ SiO _3/2 etc. A copolymer composed of structural units of. In a broad sense, a silicone resin is collectively referred to as 100% silicone resin and a silicone varnish as a solution. This silicone resin has the characteristic of forming a hard coating film by hardening. This coating film has excellent water resistance and moisture resistance. It does not have a polar group that is compatible with water, and also has a large contact angle with water. On the other hand, the moisture permeability is greater than that of other organic resin coatings due to the weak intermolecular force and relatively large molecular spacing. As a heat resistant varnish for insulation, it has strong weather resistance and heat resistance, and is used for water repellent and release as a base resin of molding materials. Such silicone resins can be manufactured and used by a number of conventionally known methods, or can be purchased commercially. Emulsifier] The silicone emulsifier is not particularly limited and may be any of nonionic, anionic, cationic or amphoteric. However, nonionic emulsifiers are preferable from the standpoints of stability of the silane or water repellency, waterproofing, and dew condensation prevention performance after application and drying. If non-ionic emulsifiers are used, the water-repellent, water-repellent, and condensation-preventing properties may be somewhat poor. Examples of non-ionic silicon-based emulsifiers are FZ-2110, FZ-2120, FZ-2164, FZ-2166, KF 351, and KF615. , KF618, KF907, X-22-6008, X-22-811, PSO71, PSO72, PSO73, TAF4200, SH3746, SH3771, SH8400, SH8410, etc. Fluorine-based emulsifiers are non-ionic and anionic without particular limitation. You can use anything, cationic, or positive. In consideration of the stability of the silane or water repellency after application drying, waterproofing (condensation prevention) and the like, nonionicity is reasonable. When fluorinated emulsifiers other than nonionic are used, the water repellency, waterproofing, and dew condensation prevention performance may be slightly lowered. As nonionic fluorinated emulsifiers, for example, rice paddies such as fluoroalkylsulfonic acid amide-modified polyalkylene oxides are generally used. Ionic, fluoroalkyl-containing polyalkylene oxide, etc. Specific examples thereof include EFTOP, EP-121, EP122A, EP122C, EF-301, EF303, EF305, MEGAFAC, F-142D, F-144D, F-171, F-172, F-177, F-815, etc. As fluorine-type emulsifiers other than nonionic, ETOP, EF-105, EF-103, EF-104, EF-112, EF-123A, EF-123B, EF-306A, EF-501, EF-204 (more anionic) EF-132 (more cationic), EF-700 (more positive), etc. As a general nonionic emulsifier, for example, glycerol monostearate , Glycerol monooleate, sorbitan monolaurate, sorbitan monet famirate, sorbitan mono stearate, sorbitan tree Strate, sorbitan monooleate, sorbitan trioleate (HLB 1.8), sorbitan mono sesquioleate (HLB 3.7), foroxyoxyethylene sorbitan monolaurate, foroxyoxyethylene sorbitan monolaurate ( HLB 13.3), polyoxyethylene sorbitan parmitate, polyoxyethylene sorbitan monostearate (HLB 14.9), polyoxyethylene sorbitan tristearate (HLB 10.5), polyoxyethylene sorbitan monooleate (HLB 15.0) , Polyoxyethylene sorbitol detraoleate (HLB 11.8), polyoxyethylene lauryl ether, polyoxyethyl ethylene acetyl ether (HLB 10.7 to 14.2), polyoxyethylene stearyl ether (HLB 9.4 to 13.9), polyoxyethylene urea Il ether, polyoxy ethylene oxyl phenol ether (HLB 13.1-17.9), polyoxy ethylene nonyl phenol ether (HLB 7.8-18.9), etc. are suitable. The amount of emulsifier is suitably 1 to 50% by weight. If it becomes a stable emulsion The permeability decreases concrete, brick or the like is difficult. In addition, if it is more than 50% by weight, sufficient water absorption performance and water repellency, waterproofing and anti-whitening performance are inferior. The amount of emulsifier does not need to be excessively added in terms of cost or performance. The whitening resistance is improved, and the amount of emulsifier can be reduced as a whole. Therefore, the use of these emulsifiers can be used to maintain the long-term performance of the emulsion, and to maintain high durability and weather resistance. Hydrogen is formed through condensation dehydration, washing with water, neutralization, etc., and silicone resin is composed of Q unit: SiO ₂ unit T unit: Monomethylsiloxane unit CH ₃ SiO _3/2 D unit: Dimethylsiloxane unit (CH ₃ ) ₂ SiOM Unit: Trimethylsiloxane Unit (CH ₃ ) ₃ SiO _1/2 D 'Unit: Diphenolsiloxane Unit (C ₆ H ₅ ) ₂ SiOT' Unit: Monophenolsiloxane Unit C ₆ H ₅ SiO _{3 The} present invention is a copolymer obtained by combining structural units such as _{/ 2. The} present invention is a mixture of silicone resin (organopolysiloxane) and the compound in a quantitative ratio, and then, by adding 1 to 50% by weight of 0 / W type emulsifier while stirring By adding water and stirring and homogenizing at high speed, the desired silicone emulsion aqueous water repellent, water repellent, and anti-condensation agent composition can be produced. The content of the compound and siloxane component of the aqueous silicone water repellent, water repellent, and anti-condensation agent composition is 1 to 40% by weight. Suitable. It is difficult to expect sufficient water repellency, waterproofing, and dew condensation prevention performance in concrete with 1 wt% of the content. Since the permeability decreases by 2 times or more, the emulsion is diluted with diluted silane components having a concentration of 1 wt% or less. It is not suitable for this application. In addition, at 40 wt% or more, the viscosity is high, so it is unsuitable to apply. The depth of penetration is not affected by the viscosity, but the surface of the substrate is stained or the penetration rate and drying tend to be slow after application. Therefore, in consideration of economical efficiency and workability, it is ideal to adjust the solid content to 40% by weight or less. Most preferably, 15 to 30% by weight of the solid component composition is diluted twice to 3 times by water and applied twice. It is the most economical and most suitable in terms of water repellency, waterproofing and condensation prevention. The composition produced is applied to construction and civil engineering materials such as concrete and brick. As described so exert internal depth of penetration, preventing binding excellent water repellency and water and then dried to obtain Condensation (absorption prevention) performance to improve the durability for a long period of time, as well as to prevent the aging of the base material.

Therefore, the composition of the present invention is particularly suitable for use as a water repellent, waterproof and condensation inhibitor (absorption inhibitor) for concrete and bricks. Further, the roof has a good effect on the water repellency and waterproofing (construction result). The reaction mechanism is as follows.

In addition, the composition of the present invention, despite the presence of alkoxy groups, which are easily condensed by hydrolysis, is not thickened, gelled, or disadvantaged even after storage for 8 months or more at room temperature. Performance as an anti-absorption agent) also shows storage stability without loss.

In addition, the silicone emulsion composition of the present invention does not damage the appearance of concrete and sediment at all, and maintains the original state of concrete and brick.

When the composition of the present invention is applied to a substrate, it may be used in a rho-la, spray, brush or mixed with cement. However, it is not limited to this method. For example, a method such as deposition may be used.

Hereinafter, the present invention will be described in detail through examples and fertilizer examples. However, the present invention is not limited only to these examples.

In the examples and comparative examples below, the amounts are parts by weight and all viscosities are at 25 ° C.

[Composition of Compound]

35 g of trimethoxysilane, 2 g of silica, and 0.03 mol of 0.1 mol of catalytic chloroplatinic acid hexahydrate were mixed and placed in an airtight container, heated and stirred at 80 ° C. for 2 to 10 hours, and then cooled to room temperature to hydrosilylate silica. Yielded almost quantitatively compound.

Example 1

18 g of the compound produced, 6 g of organopolysiloxane (M unit), 3 g of nonionic emulsifier polyoxyethylene sorbitan trioleate, and 1 g of fluorinated emulsifier EF-123B were mixed and rapidly stirred at 2000 rpm to add 72 g of water. The white aqueous silicone emulsion was prepared by emulsification and then passed through a homogenizer twice.

Example 2

A white aqueous silicone emulsion was prepared in the same manner as in Example 1 except that 2.5 g of polyoxyethylene sorbitan trioleate, 1.5 g of sorbitan monooleate, and 72 g of water were added thereto.

Example 3

A white aqueous silicone emulsion was prepared in the same manner as in Example 2, except that 3 g of polyoxyethylene sorbitan trioleate, EFTOP, and EF-122C were replaced.

Comparative Example 1

A white silicone emulsion was prepared in the same manner as in Example 1 except that 2 g of an emulsifier polyoxyethylene trioleate was added, but after 1 hour, two-layer separation began.

Comparative Example 2

20 g of methyl triethoxysilane, 2 g of nonionic emulsifier polyoxyethylene sorbitan trioleate, 1 g of sorbitan monooleate, and 2 g of EF-123 (cationic fluorinated emulsifier) were mixed at a high speed of at least 1000 rpm to slowly 75 g of water. Into a white silicone emulsion, but two layers of separation occurred.

◆ Water repellent, waterproof performance test

⊙ Absorption Ratio Measurement

The water repellent, waterproof, and dew condensation inhibitor prepared in Example was applied to cement mortar (50 × 50 × 50mm) by KSF-2451 so that the coating amounts were 0.5g, 1.0g, 1.5g, 2g, and 2.5g, respectively, at room temperature for 24 hours. Absorption ratio was evaluated by measuring the absorption after drying. The results are shown in Table 1 below. As shown in Table 1, the water-repellent, water-repellent, dew condensation inhibitor of the present invention was able to confirm the excellent waterproof performance by the absorption ratio is significantly lowered depending on the application amount.

⊙ Measure of pitch

The water repellent, waterproof, and dew condensation inhibitors prepared in Example were applied to 150 mm and inner depth of cement mortar by KSF-2451 at 150, 1.0, 1.5, 2.0, and 2.5 g, respectively, and dried at room temperature for 24 hours. The waterproof performance was evaluated by measuring the permeability ratio for the non-coated non-test specimen. The results are shown in Table 2 below. As shown in Table 2, it was confirmed that the water repellent, waterproof and condensation preventing agent of the present invention is an excellent waterproofing agent with a significantly low water permeability ratio.

⊙ compressive strength

Cement mortar (50 × 50 × 50mm) according to KSF-2451 was cured for 28 days with the water-repellent, waterproof and condensation preventing agent made as in Example, and then applied at 0.5, 1.0, 1.5, 2.0, and 2.5g, respectively, at room temperature. After 24 hours of drying, the compressive strength was measured and the compressive strength ratio (%) was calculated and evaluated for the reference specimen (no coating).

This is to grasp the problem of safety when the strength degradation occurs when the present invention is installed on the concrete structure, the results are shown in Table 3 below.

As can be seen from Table 3, when the compressive strength was measured by applying the water repellent, waterproof and condensation inhibitor of the present invention, the compressive strength did not appear to be lower than that of the standard test body. It was confirmed that the degree of curing and the error of measurement did not adversely affect the strength expression.

Therefore, it is judged that the present invention does not inhibit the strength expression when constructing concrete.

⊙ Stability Test

The water-repellent, water-proof and condensation inhibitors prepared in the same manner as described above were applied to the application amounts specified in the stability specimens by KSF-2451, respectively, and evaluated for stability test after drying at room temperature for 24 hours. The results are shown in Table 4 below.

As can be seen from Table 4, the stability test was performed by applying the water repellent, waterproof and condensation preventing agent of the present invention, and it was found that there was no abnormality in stability because cracking and torsional phenomena did not appear due to expansion.

Therefore, it has been found that there is no adverse effect of the crack generator and the torsion phenomenon by constructing the product of the present invention.

⊙ Water repellency test

The water repellency test according to KICM-QA-905 was applied to the water repellency test made of KICM-QA-905 so that the coating amount was 0.5, 1.0, 1.5, 2.0, 2.5 g, and the average water absorption was measured to evaluate the water repellency.

This is a test for confirming the water repellent, waterproof and condensation preventing agent of the present invention as a water repellent, and the results are shown in Table 5 below.

As can be seen from Table 5, the water repellency test was carried out by applying the water repellent, water repellent, and dew condensation inhibitor of the present invention. As a result, the water repellency test showed an average water absorption of 1% or less.

⊙ Whitening resistance

The water repellent, waterproof and condensation inhibitor made in the same manner as in Example was subjected to a whitening resistance test after applying a prescribed amount by KICM-QA-905 to evaluate the performance as a water repellent. The results are shown in Table 6 below. As shown in Table 6 above, it was confirmed that the whitening resistance was obtained by applying the water repellent, waterproof and condensation inhibitor of the present invention.

⊙ Weather resistance evaluation

A water repellent, waterproof, and dew condensation inhibitor prepared in Example was applied to a calcium silicate plate (100 × 100 × 6mm), dried at room temperature for 24 hours, and then contact angle was measured. After the accelerated weathering test (150 hours), the contact angle was measured. The durability of the water repellent, waterproof and condensation preventing agent of the present invention was evaluated. The results are shown in Table 7 below. Table 7 shows the result of measuring the contact angle by dropping 0.03cc of water vertically in the test unit.

The test specimen was immediately absorbed after dropping the water, and the test specimen coated with the water repellent, waterproof and condensation inhibitor of the present invention was not absorbed by water and was bound on the calcium silicate plate.

In addition, the contact angle did not change even after the accelerated durability test, it was confirmed that the durable water-repellent agent.

The silicone emulsion water-based water repellent, waterproof and condensation inhibitor of the present invention is a non-organic solvent type, which is harmless to the human body and prevents environmental pollution, and is excellent in water repellent, waterproof and condensation prevention, and also excellent in weather resistance, durability, safety and appropriateness. There is no problem in maintaining strength.

Claims (3)

In the manufacturing method of the water-repellent, waterproofing, dew condensation prevention agent based on silicone resin, 80 to 98% by weight of alkyl alkoxy silane and 1 to 20% by weight of silica were added with 1% by weight of 0.1-5 mmol molten chloroplatinic acid solution and reacted at 80-90 ° C. for 2 to 10 hours to obtain a hydrosilylation compound. 15 to 20% by weight of the compound, 5 to 10% by weight of the silicone resin and 4 to 10% by weight of the nonionic emulsifier to add a total of 100% by weight of the emulsified by stirring at 2000-5000rpm A process for producing a silicone emulsion aqueous water repellent, waterproof, condensation preventing agent. The method for producing an aqueous silicone water-repellent, waterproof, anti-condensation agent according to claim 1, wherein the chloroplatinic acid is chloroplatinic acid hexahydrate. A silicone emulsion aqueous water repellent, waterproof, anti-condensation agent produced by the production method according to claim 1 or 2.