KR100494993B1 - Waterproof Agent Comprising Alkylalkoxysilane and High Polymer - Google Patents

Abstract

The present invention relates to a silane-based waterproofing agent, and more particularly, to an emulsion cream containing an alkylalkoxysilane and a high molecular compound and a permeable waterproofing agent for civil engineering comprising the same as an active ingredient.

The present invention provides an alkylalkoxysilane emulsion cream having improved permeability resistance and improved waterproofness, and a permeable waterproofing agent comprising the same. The emulsion cream and permeable waterproofing agent of the present invention include an alkylalkoxysilane and a high molecular compound. It completely blocks up to the capillary tube to show significantly enhanced water resistance, so that it can be used in areas where large water pressure is applied without requiring a separate waterproof finish.

Description

Waterproofing agent containing alkylalkoxysilane and high molecular compound {Waterproof Agent Comprising Alkylalkoxysilane and High Polymer}

The present invention relates to a silane-based waterproofing agent, and more particularly, to an emulsion cream containing an alkylalkoxysilane and a high molecular compound and a permeable waterproofing agent for civil engineering comprising the same as an active ingredient.

Porous inorganic building materials, such as concrete, among the structures can cause damage due to erosion due to absorption of water through capillaries contained in the porous material. To prevent this, a thin layer of water repellent, that is, hydrophobic material, is applied to the capillary to block water absorption.

As such a water repellent, a wide variety of materials such as silicone compounds such as silane and polymer compounds such as fluorine resin are used. Currently, the most commonly used material is silicone compound, and silane is known to be a very effective material for such a water repellent.

Silane is a small molecule monomer, impregnated with water repellency after penetration into the material. That is, the silane reacts with moisture in the air, is converted into silanol, and then polymerized to have water repellency. Therefore, the durability of the structure is significantly increased when it is applied to the surface. In particular, alkylalkoxysilanes are known to be useful as water repellents for porous inorganic building materials because they have excellent permeability and can form strong hydrophobic layers by chemical reactions.

On the other hand, the permeable water repellent is to block the absorption of water by generating a water-repellent force inside the concrete by reacting after infiltration when applied to the inorganic building structure made of concrete and the like.

For example, Korean Patent No. 227922 discloses an emulsion in which the alkylalkoxysilane has a particle size of 2-10 μm and a concentration of 5-70% by weight. However, it is not economical because the content of the alkylalkoxysilane is too high, there is a problem in that the surface water repellency is generated, the adhesion is worse when the adhesion of the other adherend material. In addition, when the concentration of the alkylalkoxysilane is 70% or less, the concentration of water is relatively increased, resulting in a problem of deterioration in performance due to layer separation during long-term storage.

In addition, Korean Patent Laid-Open Publication No. 2001-93323 discloses an alkylalkoxysilane-based water repellent comprising an organic solvent, and by replacing a part of the silane with an organic solvent, it is relatively inexpensive and improves the adhesion of other adherent materials, but relatively large hydraulic pressure. This action site, for example, underground structures or waterway boxes have a low resistance to water permeability to act on the water pressure is limited in its use and has a disadvantage in that a separate waterproof treatment is required.

Therefore, there is an urgent need to develop a permeable waterproofing agent which is economical and does not degrade durability and adhesion of other adherent materials, and has a water repellency and waterproofing ability and can be used even at a site where a large water pressure is applied.

The disclosure of the patent documents cited herein is incorporated by reference herein in its entirety, and the level of the technical field to which the present invention belongs and the contents of the present invention are more clearly described.

The present inventors have diligently researched to develop a permeable waterproofing agent that is economical, durable and does not degrade the adhesion of other adherent materials, and can be used even at a site where a large hydraulic pressure is applied. As a result, by replacing a part of the silane with an organic solvent, The present invention was completed by confirming that the emulsion cream prepared by lowering and adding a polymer compound therein did not generate surface water repellency and significantly improved water permeability.

Accordingly, it is an object of the present invention to provide an alkylalkoxysilane emulsion cream having improved water permeability and enhanced water resistance.

Another object of the present invention is to provide a permeable waterproofing agent.

Other objects and advantages of the invention will be apparent from the following examples and claims.

According to one aspect of the present invention, the present invention provides an emulsion cream having improved water resistance including an alkylalkoxysilane, a high molecular compound, an organic solvent, and an emulsifier.

As used herein, the term "emulsion cream" means an emulsion-based water-containing composition consisting of an oil phase which is incompatible with water, and "alkylalkoxysilane emulsion cream" refers to an alkylalkoxysilane as an active ingredient. It means an emulsion cream comprising a.

As used herein, the term "water repellent" refers to a property of discharging water by converting the surface of the solid into hydrophobic so as to prevent the absorption of water by the surface tension of the solid, and "water repellent" refers to a material having such a property. it means.

Hydrophobicity refers to the case where the contact angle, which is the angle between the solid and the water, is greater than 90 °, and the principle of water repellency by penetration is widely used because it improves the durability of the structure. However, the water intrusion defense system due to the change of the surface wetting behavior of the solid, when there is a strong hydraulic pressure action, such hydrophobicity alone lacks the water repelling force and the water penetrates through the capillary tube. Therefore, at a large water pressure of 0.3 kgf / cm 2 or more, it is difficult to block the absorption of water only by the water repellency, so that a separate waterproofing treatment is required.

As used herein, the term "waterproof" means completely blocking the capillary in an inorganic structure such as concrete to completely block the absorption of water, and when the water permeability ratio is less than a certain ratio, it is referred to as "waterproof". Permeability ratio is a value comparing the weight increase of the material when water permeated at a pressure of 0.3 kgf / cm 2 compared with the case where no water repellent or waterproof agent is used. For example, the mortar waterproofing agent has a permeability ratio of 60% or less compared to when no waterproofing agent is used (Korea Housing Corporation).

In addition, the "permeable waterproofing agent" is to penetrate during application to inorganic structures such as concrete to completely block the capillary tube to block the absorption of water.

The present inventors have found that the addition of a high molecular compound to the alkylalkoxysilane significantly reduces the water permeability ratio, thereby exhibiting excellent water repellency as well as water resistance.

The alkylalkoxysilane included as an active ingredient in the emulsion cream of the present invention has a trifunctional group capable of binding to and crosslinking in concrete, etc., absorbed in concrete and reacted with moisture to be crosslinked through silanol intermediates to form a silicone polymer. The alkyl group constitutes a hydrophobic to prevent the absorption of moisture (Michael Roth, Siliconates-silicon resin-silane-siloxanes , 1982).

According to a preferred embodiment of the present invention, the content of the alkylalkoxysilane of the present invention is 10-70% by weight, more preferably 20-50% by weight. When the content of the alkylalkoxysilane is less than 10% by weight, there is a problem that the permeability and water repellency are lowered. When the content of the alkylalkoxysilane is 70% by weight or more, the particle size of the emulsion is increased so that the storage stability is lowered during long-term storage.

According to a preferred embodiment of the present invention, the alkylalkoxysilane included in the emulsion cream of the present invention has an alkyl group having 2-12 carbon atoms and an alkoxy group having 2-4 carbon atoms. When the size of the alkyl group is small, the water repellency is small, and when too large, the permeability is lowered. In addition, when the number of carbons in the alkoxy group is one, it is easy to react before permeation, so that the permeability is lowered.

Preferably, the alkyl group is methyl, ethyl, n-propyl, isopropyl, n-butyl, n-pentyl, isopentyl, neopentyl, t-pentyl, n-hexyl, n-heptyl, n-octyl, isooctyl , n-nonyl, n-decyl, n-dodecyl, cyclopentyl, cyclohexyl, 4-ethylcyclohexyl, cycloheptyl or methylcyclohexyl group, and the like. An alkyl group substituted with halogen or the like can also be used.

Preferably, the alkoxy group is an ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, s-butoxy, t-butoxy, n-pentyloxy, n-hexyloxy group, or the like. .

According to the most preferred embodiment of the present invention, the alkylalkoxysilane is n-octylethoxysilane.

In addition, the polymer compound included as an active ingredient in the emulsion cream of the present invention improves the surface adhesion and surface protection by reducing the degree of adhesion decrease due to the surface water repellency of the alkylalkoxysilane. In addition, it is used at the site where a large hydraulic pressure acts to bind to the surface of the inorganic material and the inlet of the capillary tube to impart waterproofness by blocking the capillary tube. The high molecular compound should not react with the alkylalkoxy silane and should be dissolved without any influence upon mixing with the silane or the organic solvent, and should not be separated by the reaction when applied to concrete.

According to a preferred embodiment of the present invention, the content of the polymer compound is 1-80% by weight, more preferably 3-50% by weight. When the content of the polymer compound is 1% by weight or less, there is a problem in that it does not sufficiently block the capillary tube and thus does not defend when water pressure is applied. In the case where the content of the polymer compound is 80% by weight or more, there is a problem that adversely affects the penetration of the alkylalkoxysilane.

 According to a preferred embodiment of the present invention, the molecular weight of the polymer compound is 1,000-2,000,000, more preferably 3,000-1,000,000. If the molecular weight of the high molecular compound is less than 1,000 or more than 2,000,000, there is a problem that the alkylalkoxysilane can prevent the penetration of the inorganic material or prevent the pores of the concrete capillary. Especially, if the molecular weight is too large, the pores may be filled. If the surface is damaged, the waterproofness may be deteriorated. Preferably the polymer compound is a bulk or solution polymerized polymer of acrylic, methacrylic, chloroprene, ethylene oxide adduct, acrylic copolymer, polypropylene adduct or combinations thereof. In addition, the capillary may be filled with a reactive material such as silica sol instead of a high molecular compound so as to resist the action of hydraulic pressure.

According to the most preferred embodiment of the present invention, the high molecular compound is polyacrylate.

In addition, the organic solvent included as an active ingredient in the emulsion cream of the present invention reduces the degree of adhesion deterioration due to the surface water repellency of the alkyl alkoxysilane, and economic effects can be obtained by reducing the content of the alkyl alkoxysilane.

According to a preferred embodiment of the present invention, the content of the organic solvent is 1-80% by weight, more preferably 20-70% by weight. The organic solvent is preferably less harmful to the human body and excellent in solubility of the polymer. In addition, the boiling point of the organic solvent is preferably 80-220 ° C, more preferably 90-150 ° C. If the boiling point of the organic solvent is less than 80 ℃ alkyl alkoxysilane is easily evaporated, there is a problem that the permeability is lowered. If it exceeds 220 ℃, the weakening of the polymer compound by remaining in the chain of the polymer compound to act as a plasticizer There is a problem caused by peeling from the concrete surface.

According to a preferred embodiment of the present invention, the organic solvent is an aliphatic and aromatic hydrocarbon having 6-12 carbon atoms, more preferably alkene, xylene, toluene, trimethylbenzene or tetramethylbenzene, and most preferably xylene to be.

According to a preferred embodiment of the present invention, the amount of the emulsifier included as an active ingredient in the emulsion cream of the present invention is 1-20% by weight, more preferably 2-5% by weight. If the amount of the emulsifier is less than 1% by weight, there is a problem in that sufficient emulsification is not achieved. If the amount of the emulsifier is greater than 20% by weight, the water repellency of the alkylalkoxysilane decreases, so that water repellency cannot be expected during prolonged immersion. But there is a problem that adversely affects the water resistance of the polymer compound.

 According to a preferred embodiment of the present invention, the emulsifier is selected from at least one of an anionic emulsifier, a nonionic emulsifier, a cationic emulsifier, an amphoteric emulsifier or a combination thereof. More preferably the emulsifier is a nonionic emulsifier, even more preferably polyoxyethylene alkyl ether, most preferably polyoxyethylene nonylphenyl ether.

According to another aspect of the present invention, the present invention provides a permeable waterproofing agent comprising the alkylalkoxysilane emulsion cream as an active ingredient.

According to a preferred embodiment of the present invention, the emulsion cream included in the permeable waterproofing agent of the present invention is 10-70% by weight of alkylalkoxysilane, 1-80% by weight of the high molecular compound, 1-80% by weight of the organic solvent, and 1-% of the emulsifier. The mixture comprising 20% by weight is prepared by stirring in a high speed stirrer of at least 1500 rpm to complete the emulsification when it is completely creamy. The emulsion cream has a particle size of 2-20 μm or less and a viscosity of at least 1000 cps. When the permeable waterproofing agent including the emulsion cream of the present invention is applied to a structure made of inorganic material such as concrete, the alkylalkoxysilane gradually penetrates into the capillary of the material while being transparently changed by agglomeration, and then depolymerized into the silicone polymer in the capillary Conversion of the capillary surface to water repellency. In addition, the polymer compound binds to the surface and the inlet of the capillary tube and exhibits excellent waterproofing property to prevent ingress of water into the capillary tube. However, when the stirring speed is low during manufacture, the alkyl alkoxysilane is easily hydrolyzed to separate the layers, resulting in deterioration of performance and deterioration in performance when used in walls and the like. In addition, the alkylalkoxysilane is combined with the polymer compound, and the polymer compound is precipitated as an insoluble polymer by the reaction. Therefore, it is desirable to prepare a complete cream.

At this time, if there are a lot of air bubbles are present, the storage stability may be reduced, so it is preferable to suppress the generation of bubbles by using a silicone- or fatty acid-based antifoaming agent. Preservatives may be added to the mixture for long term storage. However, it is not very necessary for 6 months of storage because it is assumed that the propagation of bacteria is suppressed by the alcohol formed by the reaction of a small amount of alkylalkoxysilane with water.

After emulsifying the alkylalkoxysilane and the organic solvent into the cream phase, the polymer and the organic solvent are separately prepared in the cream phase in water containing the emulsifier, and the two kinds of creams are mixed at a stirring speed in a range where the particles are not damaged. Even when used, the performance is the same.

When the permeable waterproofing agent including the emulsion cream of the present invention is applied to an inorganic structure such as concrete, the degree of permeation can be clearly distinguished from the water-repellent part not wetted by water by cutting a part of the structure. In addition, when the hydraulic action of 3 kgf / ㎠ remarkably reduced the permeability ratio is suitable for waterproofing walls and floors of underground structures. In addition, the water-repellent powder has a durability of more than 20 years, and does not require a separate waterproof finish, and can be completely waterproof by only a general finish such as painting.

Hereinafter, the present invention will be described in more detail with reference to Examples. These examples are only for illustrating the present invention in more detail, and the scope of the present invention is not limited by these examples in accordance with the gist of the present invention to those skilled in the art. Will be self-evident.

Example

Example 1 Preparation and Performance Test of Alkylalkoxysilane Emulsion Cream Including Silica Sol

To prepare a alkyl alkoxysilane emulsion cream by rapidly stirring at about 1500 rpm while slowly dropping the solution 1, a mixture of alkyl alkoxysilane, organic solvent, silica sol and emulsifier in the content as shown in Table 1 to Solution 2, The performance (permeability, permeability resistance and adhesion) was tested. The results are shown in Table 2 below.

division ingredient Content (% by weight) Solution 1 n-octylethoxysilane 43.93 xylene 29.06 Silica sol 4.88 Polyoxyethylene nonylphenyl ether 2.93 Solution 2 water 17.58 Sorbitol fatty acid ether 1.46 Antifoam 0.16 system 100

The performance (infiltration depth, permeability ratio, absorption ratio, adhesive strength and durability) in concrete of the emulsion cream prepared with the above composition was examined by the following method and the results are shown in Table 2 below.

1. Penetration depth measurement

Concrete was prepared using a unit volume of 340 kg of cement, 768 kg of sand, 941 kg of gravel, and 173 kg of water to make a circular cylinder mold 10 cm in diameter and 10 cm in height. , And dried for 14 days at 50% relative humidity. The waterproof agent sample 150 ㏄ / ㎡ was applied to it and stored for 14 days under the same conditions, and then the center was destroyed. When the fracture surface is immersed in water, it can be clearly distinguished into the wet and non-wet areas, which are read up to 0.1 mm by vernier calipers.

2. Permeability ratio and absorption ratio measurement

Permeability ratio and absorption ratio were measured using "KS F 2451 Building Cement Waterproofing Test Method". The formula of permeability ratio and absorption ratio is shown in the following formulas (1) and (2).

Permeability ratio = (permeability of water repellent / permeability of non-water repellent) × 100

Absorption ratio = (absorption rate of the waterproofing agent / absorption rate of the non-waterproofing agent) × 100

The water permeability ratio is an indicator for waterproofness, and the smaller the value, the better the waterproofness. The water absorption ratio is an index for the water repellency, the smaller the number may be regarded as excellent water repellency.

3. Compression shear adhesion strength measurement

Compressive shear strength was tested by "ASTM C 882" and "Test method for bond strength of epoxy-resin systems for concrete, American Society for Testing and Materials ". . The formula for compressive shear adhesion strength is as shown in Equation 3 below.

Compressive shear bond strength = vertical load (kgf) / cross section of sample (㎠)

Item result Penetration depth (mm) 8.0 Pitcher Ratio (%) 0.12 Absorption Ratio (%) 0.10 Compression Shear Adhesion Strength (㎏f / ㎠) 17.5

As shown in Table 2, it can be seen that the emulsion cream exhibits excellent permeability, permeability resistance, absorption barrier property and adhesion.

4. Durability Test

In order to test the durability of the emulsion cream, the surface of the concrete was rubbed 30 times with an iron brush to remove the coated surface, and then the emulsion cream was applied and the permeability ratio and the absorption ratio were measured and compared with the results of Table 2 above. It was. The results are shown in Table 3 below.

division Pitcher Ratio (%) Absorption Ratio (%) Before surface removal 0.12 0.08 After surface removal 0.13 0.08

As shown in Table 3, the permeability ratio and the absorption ratio of the emulsion cream were similarly measured before and after removing the coated surface of the concrete. Since the removal of the coated surface means abrasion with the use of the structure, it can be seen that the emulsion cream exhibits excellent durability against wear over time or the use of the structure.

Example 2: Preparation and Performance Test of Alkylalkoxysilane Emulsion Creams Containing High Molecular Compounds

Except for using a polyacrylate instead of a silica sol to prepare an emulsion cream in the same manner as in Example 1, by changing the content of the polyacrylate, alkyl alkoxysilane and organic solvent in the composition shown in Table 4 The performance of each emulsion cream was tested in the same manner as in Example 1. The polyacrylate used at this time has a weight average molecular weight of 8000 g / mole. The results are shown in Table 4 below.

Ingredient (% by weight) Before surface removal After surface removal n-octylethoxysilane xylene Polyacrylate Penetration depth (mm) Permeability ratio (%) Absorption Ratio (%) Permeability ratio (%) Absorption Ratio (%) 30 48.87 0 7.2 0.87 0.09 18.3 0.89 0.09 30 43.99 4.88 8.0 0.12 0.08 18.2 0.12 0.08 30 38.87 10 6.9 0.11 0.08 17.6 0.10 0.08 30 33.87 15 7.1 0.12 0.08 18.3 0.12 0.07 30 28.87 20 6.4 0.10 0.06 17.5 0.10 0.07 30 23.87 25 5.2 0.09 0.07 19.6 0.10 0.07

As shown in Table 4, even when polyacrylate was used, the performances such as permeability and water resistance were maintained the same as when silica sol was used. In particular, the use of polyacrylate significantly reduced the permeability ratio than when not used at all. This is believed to be due to the filling of the micropores of the capillary with the molecular compound. In addition, when using more than 4.88% polyacrylate, the permeability ratio did not decrease significantly any more. Therefore, it can be seen that the emulsion cream of the present invention has excellent permeability resistance. In addition, when the emulsion creams were treated with concrete and mortar was attached to the surface, the compressive shear adhesive strength was increased compared with that without any treatment. On the other hand, when the content of the polymer compound is 25%, there is no change in the performance of adhesion and water permeability, but the treated surface is darkened, so it is determined that the polymer film is formed. In addition, as a result of the performance test before and after surface removal, the same result as when using a silica sol was obtained. Therefore, it can be seen that the emulsion cream of the present invention has excellent adhesion to the adherend material by reducing the surface water repellency of the alkylalkoxysilane, and it can be seen that the waterproofness is maintained even after the surface damage.

Example 3: Performance Test of Emulsion Cream Containing Only High Polymer Compound

Emulsion cream (A) containing an alkylalkoxysilane in the composition of Table 5 and no polymer compound at all, and emulsion cream (B) containing a high molecular compound and no alkylalkoxysilane in the composition of Table 6 below After the preparation was stirred at a speed of 6 rpm to compare the performance. The results are shown in Table 7 below.

division ingredient Content (% by weight) Solution 1 n-octylethoxysilane 70.0 xylene 10.8 Solution 2 water 17.58 Polyoxyethylene nonylphenyl ether 1.46 Antifoam 0.16 system 100

division ingredient Content (% by weight) Solution 1 xylene 60.8 Polyacrylate 20.0 Solution 2 water 17.58 Polyoxyethylene nonylphenyl ether 1.46 Antifoam 0.16 system 100

division Penetration depth (mm) Pitcher Ratio (%) Absorption Ratio (%) Compression Shear Adhesion Strength (㎏f / ㎠) A 7.0 0.87 0.08 18.3 B 0 0.10 0.10 17.5

As shown in Table 7, when only the polymer compound was emulsion creamed, the permeability ratio and the absorption ratio were both satisfied enough, but permeability was not secured. On the other hand, when only the alkyl alkoxysilane was creamed, the permeability ratio was significantly increased, so that the permeability resistance was not improved.

In addition, in order to test the durability of the emulsion cream, the surface of the concrete was rubbed 30 times with an iron brush to remove the coated surface and then apply the A and B emulsion cream and compare the permeability ratio and absorption ratio of each emulsion cream. It was. The results are shown in Table 8 below.

division Before surface removal After surface removal Pitcher Ratio (%) Absorption Ratio (%) Pitcher Ratio (%) Absorption Ratio (%) A 0.87 0.08 0.87 0.07 B 0.10 0.10 0.98 0.94

As shown in Table 8, when the coated surface was removed, the permeability ratio and the absorption ratio were significantly increased than before the surface removal when the polymer compound was used, thereby reducing the permeation resistance. On the other hand, when only alkylalkoxysilane was used, the permeability ratio and the absorption ratio were measured similarly before the surface removal, and still showed low permeability resistance. Therefore, it can be seen that the alkylalkoxysilane and the polymer compound must be included together to enhance the durability of the emulsion cream.

Example 4: Performance test when the alkylalkoxysilane and the high molecular compound were each emulsified and mixed

To prepare an emulsion cream with the composition as shown in Table 1, after emulsifying the alkyl alkoxysilane and the organic solvent in the form of a cream, the polymer and organic solvent separately prepared in a cream form in water containing the emulsifier, two types of cream The mixture was mixed at a stirring speed in a range where the particles were not damaged. The performance of the emulsion cream was compared with the emulsion cream of Example 1. The results are shown in Table 9 below.

division Penetration depth (mm) Pitcher Ratio (%) Compression Shear Adhesion Strength (㎏f / ㎠) Example 1 8.0 0.12 18.2 Emulsifying Each 7.0 0.11 17.6

As shown in Table 9, when preparing the emulsion cream of the present invention, the performance of the emulsion and the alkyl alkoxysilane and the polymer compound when all the active ingredients are mixed and did not differ significantly. . this is, This is because the alkylalkoxysilane is first absorbed to form a water repellent layer, and the polymer is slowly transported to block the capillary of concrete to generate a waterproofing force. Therefore, it can be seen that the same performance is obtained even when the alkylalkoxysilane and the polymer compound are used after being emulsified, respectively.

Having described the specific part of the present invention in detail, it is apparent to those skilled in the art that the specific technology is merely a preferred embodiment, and the scope of the present invention is not limited thereto. Thus, the substantial scope of the present invention will be defined by the appended claims and equivalents thereof.

As described in detail above, the present invention provides an alkylalkoxysilane emulsion cream with improved permeability resistance and a permeable waterproofing agent including the same. The emulsion cream and the permeable water repellent agent of the present invention include alkylalkoxysilane and a high molecular compound to completely repel not only the water repellency but also the capillary of the inorganic material, thereby showing remarkably enhanced water resistance. It can be used and has excellent permeability, adhesion and durability.

Claims (12)

10-70% by weight alkylalkoxysilane, 1-80% by weight polyacrylate, 1-80% by weight organic solvent and 1-20 having an alkyl group having 2-12 carbon atoms and an alkoxy group having 2-4 carbon atoms Waterproofing enhanced alkylalkoxysilane emulsion cream comprising a weight percent emulsifier. delete delete delete The emulsion cream of claim 1 wherein the polyacrylate has a molecular weight of 1,000-2,000,000. delete delete The emulsion cream of claim 1 wherein the organic solvent is an aliphatic and aromatic hydrocarbon having 6-12 carbon atoms. delete The emulsion cream of claim 1, wherein the emulsifier is selected from the group consisting of anionic emulsifiers, nonionic emulsifiers, cationic emulsifiers, amphoteric emulsifiers, and combinations thereof. The emulsion cream of claim 10 wherein said emulsifier is a nonionic emulsifier. A permeable waterproofing agent comprising the alkylalkoxysilane emulsion cream of claim 1, 5, 8, 10, or 11 as an active ingredient.