WO2021036800A1

WO2021036800A1 - Spraying fast-setting rubber asphalt waterproof material special for exterior wall and preparation method thereof

Info

Publication number: WO2021036800A1
Application number: PCT/CN2020/108867
Authority: WO
Inventors: 王荣博; 严从立; 王志强; 辛海洋; 劳振兴
Original assignee: 山东北方创信防水科技集团股份有限公司
Priority date: 2019-08-23
Filing date: 2020-08-13
Publication date: 2021-03-04
Also published as: CN110484140A

Abstract

A spraying fast-setting rubber asphalt waterproof material special for exterior wall and a preparation method thereof belong to the field of waterproof coatings. Said waterproof material comprises a component A and a component B. The component B is a coagulant solution formulated by adding water to calcium chloride, sodium chloride and a composite aluminum-iron polymer. The component A comprises 30 to 50 parts of a polymer latex, 50 to 70 parts of an emulsified asphalt, 5 to 30 parts of a reinforcing aid, and 0.3 to 1.5 parts of other aid. The reinforcing aid is a nano silica sol. The other aid is one or more of an antioxidant, a light stabilizer, a mildew preventive and a defoamer. The polymer latex is selected from latexes having a high gel content, and a nano silica sol is added into the component A. After film formation, the tensile strength is ≥ 1.2 MPa, the elongation is ≥ 1000%, and the bonding strength is ≥ 0.8 Mpa. The waterproofing material has good high and low-temperature performance, is resistant to acids, alkali and salts, has good weather resistant performance, and still has good waterproof property even if the plaster layer and the decorative layer are cracked.

Description

Special spraying quick-setting rubber asphalt waterproof material for exterior wall and preparation method thereof

Technical field

The invention relates to the field of waterproof coatings, in particular to a spraying quick-setting rubber asphalt waterproof material special for exterior walls and a preparation method thereof.

Background technique

In recent years, external wall leakage has occurred from time to time, seriously affecting people's lives. It is understood that due to the lack of rain in the northern region, most of the exterior walls of buildings have not been specially waterproofed. However, wall leakage problems occur from time to time, which brings great inconvenience to people's lives.

The external wall structure is complex, in addition to the main structure, it also includes an insulation layer and a finishing layer. When constructing the insulation layer and finish layer, first paste the insulation board on the main wall with bonding mortar, then anchor it with anchors, then use plastering mortar and mesh cloth to smooth and reinforce the insulation layer, and construct after curing. Finishing layer. Although the plastering layer and the finishing layer of the insulation board can prevent rainwater from penetrating into the wall to a certain extent, they are not waterproof materials in the strict sense, and the waterproof effect is not strong, and both are rigid materials. Cracks are easy to occur under the action, and rainwater will penetrate into the interior from the cracks after cracking; In addition, the current bonding between the insulation board and the wall is difficult to achieve full adhesion, and it is easy to form channeling water after the rainwater penetrates, causing the external wall to seep It is difficult to find leaks, and it has become a problem to repair leaks on external walls, which seriously affects people's quality of life. In order to solve the problem of external wall water leakage, the present invention provides a special sprayed quick-setting rubber asphalt waterproof coating for external walls and an integrated structure for external wall insulation, waterproofing and decoration.

Summary of the invention

In order to make up for the shortcomings of the prior art, the present invention provides a sprayed quick-setting rubber asphalt waterproof material for exterior walls and a preparation method thereof.

The technical scheme of the present invention is:

A special spraying quick-setting rubber asphalt waterproof material for exterior walls, comprising a component A and a component B, the component B being a coagulant solution made up of calcium chloride, sodium chloride and composite aluminum-iron polymer and water; In parts by weight, the A component includes 30-50 parts of polymer latex, 50-70 parts of emulsified asphalt, 5-30 parts of reinforcing aids, and 0.3-1.5 parts of other auxiliary agents; It is a nano-silica sol; the other additives are one or more of antioxidants, light stabilizers, anti-mold agents, and defoamers.

As a preferred solution, the reinforcing aid is a nano silica sol with a nano silica content of 25%-30%.

As a preferred solution, the A component includes 10-25 parts of nano silica sol.

As a preferred solution, the polymer latex is one of natural latex, nitrile latex, neoprene latex, styrene-butadiene latex, and acrylic latex, or a combination of multiple latexes; the gel content of the polymer latex It is 40% to 70%. Natural rubber latex, nitrile rubber latex, neoprene rubber latex, styrene-butadiene rubber latex, and acrylic latex have good low temperature performance, acid and alkali salt resistance, and good weather resistance.

As a preferred solution, the emulsified asphalt is emulsified from 70# asphalt and 50# asphalt, and then used singly or in combination. Emulsified 70# asphalt and 50# asphalt have good high temperature resistance.

As a preferred solution, according to the mass fraction, the B component is 1%～99.6% calcium chloride, 0.2%～2% sodium chloride and 0.2%～3% composite aluminum-iron polymer with water. 20% solution.

As a preferred solution, the antioxidant is a hindered phenol water emulsion antioxidant; the light stabilizer is an aqueous ultraviolet absorber; and the defoamer is a silicone defoamer. Of course, antioxidants, light stabilizers, and defoamers can also be other types used in the field.

The antifungal agent can be an antifungal agent used in the art, such as 5-chloro-2-methyl-4-isothiazolin-3-one.

The method for preparing the spraying quick-setting rubber asphalt waterproof material for exterior walls is to mix the polymer emulsion and emulsified asphalt uniformly, add reinforcing aids and other additives to the polymer emulsion and emulsified asphalt, and stir evenly to obtain A Components: Weigh calcium chloride, sodium chloride and composite aluminum-iron polymer, add water to form a coagulant solution, and obtain component B.

The method of adopting the special sprayed quick-setting rubber asphalt waterproof material for exterior wall to carry out the integrated construction of exterior wall thermal insulation and waterproof decoration includes the steps:

1) Construction of insulation layer

After cleaning the exterior wall, use bonding mortar to fully glue the insulation board, then anchor the insulation board with anchors, then apply a layer of plastering mortar on the outside of the insulation board, and apply a glass fiber cloth while wet, and then apply a layer of plaster Mortar, curing and drying;

2) Construction of waterproof layer

After the thermal insulation layer plastering mortar is dried, the surface is cleaned, and the exterior wall special spray quick-setting rubber asphalt waterproof material is sprayed. The A component and the B component are sprayed at the same time. The spraying capacity ratio of the A and B components is 1/ 15～1/3.5, component A and component B condense into a film during the cross-atomization process, and cure and dry;

3) The construction of the finishing layer.

As a preferred solution, in step 2), the waterproof layer is sprayed with a wet film thickness of 3 to 4 mm.

The spraying quick-setting rubber asphalt waterproof material for external walls of the present invention uses polymer latex with high gel content, and the latex with high gel content contains certain pre-crosslinking components, has high film-forming strength and good high temperature resistance.

In the A component of the spraying quick-setting rubber asphalt waterproof material for exterior walls of the present invention, the polymer latex with high gel content is used as the base material, and the nano silica sol is creatively added; the nano silica sol is a kind of A colloid of nano-materials, liquid, low viscosity, can penetrate into the gap of the substrate; it can be well compatible with the A component; its particle size is nano-scale, between 10nm and 20nm, in the form of flocculent or net The structure has a very large specific surface area. There are many active groups Si-OH, which interact with the surrounding rubber molecules to form more ionic bonds and better reinforcement; after drying, the silicon-oxygen bonds of the colloidal particles are firm Attaches to the surface of the object, playing a good bonding role. In addition, the nano silica sol can be directly added to the A component, and it can achieve uniformity and stability without the need for a dispersant.

The beneficial effects of the present invention are:

1. The spraying diaphragm of the special spraying quick-setting rubber asphalt waterproof coating for exterior walls of the present invention has excellent performance: tensile strength ≥1.2Mpa, elongation ≥1000%, bonding strength ≥0.8MPa, good high and low temperature performance, acid and alkali resistance The salt and weather resistance are excellent, which effectively guarantees the firm adhesion of the waterproof membrane layer to the plastering base surface and the decorative surface. Even if the plastering surface layer and the decorative surface layer are cracked, it still has good waterproof performance.

2. The spraying quick-setting rubber asphalt waterproof coating for external walls of the present invention is simple to prepare, convenient and quick to construct. The A and B components quickly condense into a film during the cross-atomization process, and there is no risk of sagging, and the water is environmentally friendly.

3. The sprayed quick-setting rubber asphalt waterproof coating for exterior walls of the present invention has good acid, alkali and salt resistance and weather resistance, and the alkali-resistant primer process can be omitted when the decorative surface is constructed.

detailed description

A special spraying quick-setting rubber asphalt waterproof material for exterior walls, including component A and component B, component B is a coagulant solution prepared by calcium chloride, sodium chloride and composite aluminum-iron polymer with water; according to weight Calculated in parts, component A includes 30-50 parts of polymer latex, 50-70 parts of emulsified asphalt, 5-30 parts of reinforcing additives, and 0.3-1.5 parts of other additives; the reinforcing aid is nano silica sol ; Other auxiliary agents are one or more of antioxidants, light stabilizers, antifungal agents, and defoamers.

In some embodiments, the reinforcing aid is a nano silica sol with a nano silica content of 25%-30%.

In some embodiments, the A component includes 10-25 parts of nano silica sol.

In some embodiments, the polymer latex is one of natural latex, nitrile latex, neoprene latex, styrene-butadiene latex, and acrylate latex, or a combination of multiple latexes; the gel content of the polymer latex It is 40% to 70%.

In some embodiments, the emulsified asphalt is emulsified by 70# asphalt and 50# asphalt, and then used singly or in combination.

In some embodiments, according to the mass fraction, component B is 1%～99.6% calcium chloride, 0.2%～2% sodium chloride and 0.2%～3% composite aluminum-iron polymer with water. 20% solution.

In some embodiments, the antioxidant is a hindered phenol water emulsion antioxidant; the light stabilizer is an aqueous ultraviolet absorber; and the defoamer is a silicone defoamer.

In some embodiments, the antifungal agent is 5-chloro-2-methyl-4-isothiazolin-3-one.

The types of antioxidants, light stabilizers, defoamers, and antifungal agents in the waterproof material of the present invention are not required, and the commonly used additives in this field are sufficient. The above examples are more commonly used additives.

The preparation method of special spraying quick-setting rubber asphalt waterproof material for exterior wall is to mix the polymer emulsion and emulsified asphalt evenly, add reinforcing additives and other additives to the polymer emulsion and emulsified asphalt, and stir evenly to obtain component A ; Weigh calcium chloride, sodium chloride and composite aluminum-iron polymer, add water to make a coagulant solution to obtain component B.

The method of adopting special spraying quick-setting rubber asphalt waterproof material for exterior wall to carry out the integrated construction of exterior wall thermal insulation and waterproof decoration, including the steps:

1) Construction of insulation layer

2) Construction of waterproof layer

After the plastering mortar of the insulation layer is dried, the surface is cleaned, and the spraying quick-setting rubber asphalt waterproof material for exterior walls is sprayed. The A component and the B component are sprayed at the same time. The spraying capacity ratio of the A and B components is 1/15～ 1/3.5, the A component and B component condense into a film during the cross-atomization process, and the waterproof layer is sprayed with a wet film thickness of 3 to 4 mm; cured and dried;

3) The construction of the finishing layer.

Example 1

1. A special sprayed quick-setting rubber asphalt waterproof material for exterior walls, which is composed of component A and component B.

In this embodiment, the A component consists of 45Kg of neoprene latex with a gel content of 55% to 70%, 45Kg of 70# emulsified asphalt, 7Kg of nano silica sol (with a silica content of 25% to 30%), It is composed of 0.5Kg antioxidant, 0.5Kg light stabilizer, 0.5Kg antifungal agent and 1.5Kg organic silicon defoamer.

The B component is an aqueous solution with a mass fraction of 10% made up of 98Kg calcium chloride, 0.5Kg sodium chloride and 1.5Kg composite aluminum-iron polymer.

2. The preparation method of component A in the spraying quick-setting rubber asphalt waterproof material for exterior walls: mix the neoprene latex and 70# emulsified asphalt evenly, and add nano silica sol to the neoprene latex and 70# emulsified asphalt. Antioxidant, light stabilizer, antifungal agent and organic silicon defoamer, stir evenly to obtain component A.

The preparation method of component B in the spraying quick-setting rubber asphalt waterproof material for exterior walls: weigh calcium chloride, sodium chloride and composite aluminum-iron polymer, add water to form a coagulant solution, and obtain component B.

3. The method of adopting the special sprayed quick-setting rubber asphalt waterproof material for exterior wall to carry out the integrated construction of exterior wall insulation, waterproof and decoration, including the steps:

1) Construction of insulation layer

2) Construction of waterproof layer

After the plastering mortar of the insulation layer is dried, the surface is cleaned, and the exterior wall special spray quick-setting rubber asphalt waterproof material is sprayed. The A component and the B component are sprayed at the same time. The spraying capacity ratio of the A and B components is 1/10. The A component and the B component condense into a film during the cross-atomization process, and the waterproof layer is sprayed with a wet film thickness of 3 to 4 mm; cured and dried;

3) For the construction of the finishing layer, spray the sandy paint directly after the waterproof layer is dried; the spraying thickness of the sandy paint is 2～3mm.

Comparative example 1

Compared with Example 1, the A component does not include nano silica sol. The rest is the same as in Example 1.

Comparative example 2

Compared with Example 1, the nano silica sol in component A was replaced with 2Kg silica powder. The rest is the same as in Example 1.

Comparative example 3

Compared with Example 1, the neoprene latex with high gel content (55% to 70% gel content) in component A is replaced with chlorine with low gel content (15% to 25% gel content). Ding latex. The rest is the same as in Example 1.

In order to emphasize the reinforcing effect of nano-silica sol, comparative example 1 and comparative example 2 are set. In order to emphasize the high gel content of polymer latex, comparative example 3 is set, and the GB/T16777 2008 architectural waterproof coating experimental method is used to test separately The tensile strength, elongation at break and bonding strength of the waterproof layer are shown in Table 1.

Table 1 Example 1, Control Example 1, Control Example 2, Control Example 3 Waterproof Layer Performance Test Results

To	实施例1Example 1	对照例1Comparative example 1	对照例2Comparative example 2	对照例3Comparative example 3
拉伸强度/MPaTensile strength/MPa	1.251.25	0.910.91	1.071.07	0.710.71
断裂伸长率/％Elongation at break/%	10501050	12031203	812812	11151115
粘结强度/MPaBond strength/MPa	0.850.85	0.620.62	0.710.71	0.520.52

It can be seen from Table 1:

1. The spraying quick-setting rubber asphalt waterproof material for exterior walls of the present invention adds nano-silica sol. Compared with no addition, although the elongation at break is slightly lower, the tensile strength and bonding strength are both to a great extent The promotion.

2. When the nano silica sol in the sprayed quick-setting rubber asphalt waterproof material for exterior walls of the present invention is replaced with silica powder, the tensile strength, elongation at break, and bonding strength are all significantly reduced.

3. Replace the polymer latex with high gel content in the sprayed quick-setting rubber asphalt waterproof material for exterior walls of the present invention with polymer latex with low gel content. Although the elongation at break has increased, the tensile strength and viscosity are improved. The knot strength is significantly reduced.

Example 2

In this embodiment, component A consists of 25Kg neoprene latex with a gel content of 55% to 70%, 18Kg natural rubber latex with a high gel content of 40%-60%, 25Kg 50# emulsified asphalt, 20Kg 70# emulsified asphalt, 9Kg nano silica sol (silica content 25%-30%), 0.5Kg antioxidant, 0.5Kg light stabilizer, 0.5Kg anti-mold agent and 1.5Kg organic silicon defoamer .

The B component is an 8% aqueous solution prepared by 97Kg calcium chloride, 1.5Kg sodium chloride and 1.5Kg composite aluminum-iron polymer.

2. The preparation method of component A in the spraying quick-setting rubber asphalt waterproof material for exterior walls: mix neoprene latex, natural latex, 50# emulsified asphalt and 70# emulsified asphalt evenly, # Emulsified asphalt and 70# Emulsified asphalt is added with nano silica sol, antioxidant, light stabilizer, anti-fungal agent and organic silicon defoamer, and mix evenly to obtain component A.

1) Construction of insulation layer

2) Construction of waterproof layer

After the plastering mortar of the insulation layer is dried, the surface is cleaned, and the exterior wall special spray quick-setting rubber asphalt waterproof material is sprayed. The A and B components are sprayed at the same time. The spraying capacity ratio of the A and B components is 1/12. The A component and B component condense into a film during the cross-atomization process, and the waterproof layer is sprayed with a wet film thickness of 3 to 4 mm; cured and dried;

3) Finishing layer construction, after the waterproof layer is dried, first apply the real stone paint primer, after drying, bond the grid joint paper, spray the real stone paint, uncover the grid joint paper, and finally spray the transparent topcoat; transparent topcoat spraying The thickness is 2～3mm.

Example 3

In this embodiment, component A is composed of 38Kg of neoprene latex with a gel content of 55% to 70%, 5Kg of styrene butadiene latex with a gel content of 60% to 75%, 23Kg 50# emulsified asphalt, 20Kg 70# emulsification It is composed of asphalt, 10Kg nano silica sol (silica content 25%-30%), 0.5Kg antioxidant, 0.5Kg light stabilizer, 0.5Kg anti-mold agent and 1.5Kg organic silicon defoamer.

The B component is an aqueous solution with a mass fraction of 15% made up of 96Kg calcium chloride, 1.5Kg sodium chloride and 2.5Kg composite aluminum-iron polymer.

2. The preparation method of component A in the spraying quick-setting rubber asphalt waterproof material for exterior walls: mix neoprene latex, styrene butadiene latex, 50# emulsified asphalt and 70# emulsified asphalt evenly, , 50# emulsified asphalt and 70# emulsified asphalt are added with nano silica sol, antioxidant, light stabilizer, antifungal agent and organic silicon defoamer, and mix well to obtain component A.

1) Construction of insulation layer

2) Construction of waterproof layer

After the thermal insulation layer plastering mortar is dried, the surface is cleaned, and the exterior wall special spray quick-setting rubber asphalt waterproof material is sprayed. The A component and the B component are sprayed at the same time. The spraying capacity ratio of the A and B components is 1/8. The A component and B component condense into a film during the cross-atomization process, and the waterproof layer is sprayed with a wet film thickness of 3 to 4 mm; cured and dried;

3) For finishing layer construction, spray sandy paint directly after the waterproof layer is dried; the spraying thickness of sandy paint is 2～3mm.

Example 4

In component A, 45Kg of neoprene latex with a gel content of 55% to 70% is replaced with 15Kg of neoprene latex with a gel content of 55% to 70%, 15Kg of nitrile latex with a gel content of 40% to 60%, 15Kg of acrylate latex with a gel content of 60% to 75%; the rest are the same as in Example 1.

Example 5

In component A, 45Kg of neoprene latex with a gel content of 55% to 70% is replaced with 30Kg of neoprene latex with a gel content of 55% to 70%, and 15Kg of acrylate latex with a gel content of 60% to 75%; The rest is the same as in Example 1.

Example 6

In component A, "45Kg 70# emulsified asphalt" is replaced with "25Kg 70# emulsified asphalt and 20Kg 50# emulsified asphalt"; the rest are the same as in Example 1.

Example 7

In component A, "45Kg 70# emulsified asphalt" is replaced with "45Kg 50# emulsified asphalt"; the rest are the same as in Example 1.

Example 8

In the B component, "98Kg calcium chloride, 0.5Kg sodium chloride and 1.5Kg composite aluminum-iron polymer solution with a mass fraction of 10%" replaced with "99Kg calcium chloride, 0.3Kg sodium chloride and 0.7Kg The composite aluminum-iron polymer is formulated into an aqueous solution with a mass fraction of 10%", and the rest is the same as in Example 1.

Example 9

In component B, "98Kg calcium chloride, 0.5Kg sodium chloride and 1.5Kg composite aluminum-iron polymer solution with a mass fraction of 10%" replaced with "95.5Kg calcium chloride, 1.5Kg sodium chloride and 3Kg The composite aluminum-iron polymer is formulated into an aqueous solution with a mass fraction of 6%", and the rest is the same as in Example 1.

Example 10

In the B component, "98Kg calcium chloride, 0.5Kg sodium chloride and 1.5Kg composite aluminum-iron polymer solution with a mass fraction of 10%" replaced with "98Kg calcium chloride, 0.5Kg sodium chloride and 1.5Kg The composite aluminum-iron polymer is formulated into an aqueous solution with a mass fraction of 15%", and the rest is the same as in Example 1.

Example 11

The neoprene latex in component A was replaced with styrene butadiene latex, and the rest were the same as in Example 2.

Claims

A special spraying quick-setting rubber asphalt waterproof material for exterior walls, comprising a component A and a component B, the component B being a coagulant solution made up of calcium chloride, sodium chloride and composite aluminum-iron polymer and water; It is characterized in that, in terms of parts by weight, the A component includes 30-50 parts of polymer latex, 50-70 parts of emulsified asphalt, 5-30 parts of reinforcing additives, and 0.3-1.5 parts of other additives; The reinforcing auxiliary agent is nano silica sol; the other auxiliary agents are one or more of antioxidants, light stabilizers, anti-mold agents, and defoamers.
The special sprayed quick-setting rubber asphalt waterproof material for exterior walls according to claim 1, wherein the reinforcing aid is a nano-silica sol with a nano-silica content of 25%-30%.
The special sprayed quick-setting rubber asphalt waterproof material for exterior walls according to claim 1 or 2, characterized in that: the A component includes 10-25 parts of nano silica sol.
The special sprayed quick-setting rubber asphalt waterproof material for exterior walls according to claim 1 or 2, wherein the polymer latex is one of natural latex, nitrile latex, neoprene latex, styrene-butadiene latex, and acrylate latex. A latex or a combination of multiple latexes; the gel content in the polymer latex is 40% to 70%.
The special sprayed quick-setting rubber asphalt waterproof material for exterior walls according to claim 1 or 2, characterized in that: the emulsified asphalt is emulsified by 70# asphalt and 50# asphalt, and then used singly or in combination.
The special sprayed quick-setting rubber asphalt waterproof material for exterior walls according to claim 1 or 2, characterized in that: according to the mass fraction, the B component is composed of 95%-99.6% calcium chloride, 0.2%-2% chlorinated A 1%-20% solution of sodium and 0.2%-3% composite aluminum-iron polymer and water.
The special sprayed quick-setting rubber asphalt waterproof material for exterior walls according to claim 1, wherein the antioxidant is a hindered phenol water emulsion antioxidant; the light stabilizer is a water-based ultraviolet absorber; The defoamer is a silicone type defoamer.
The method for preparing a sprayed quick-setting rubber asphalt waterproof material for exterior walls according to claim 1, characterized in that: the polymer emulsion and emulsified asphalt are mixed uniformly, and reinforcing additives and other additives are added to the polymer emulsion and emulsified asphalt. Mix it evenly to obtain component A; weigh calcium chloride, sodium chloride and composite aluminum-iron polymer, add water to form a coagulant solution, and obtain component B.
The method of using the special sprayed quick-setting rubber asphalt waterproof material for external walls to perform integrated construction of external wall insulation, waterproofing and decoration, characterized in that it comprises the steps:

1) Construction of insulation layer

After cleaning the exterior wall, use bonding mortar to fully glue the insulation board, then anchor the insulation board with anchors, then apply a layer of plastering mortar on the outside of the insulation board, and apply a glass fiber cloth while wet, and then apply a layer of plaster Mortar, curing and drying;

2) Construction of waterproof layer

After the plastering mortar of the insulation layer is dried, the surface is cleaned, and the exterior wall special spray quick-setting rubber asphalt waterproof material is sprayed. The A and B components are sprayed at the same time. The spraying capacity ratio of the A and B components is 1 15～1/3.5, component A and component B condense into a film during the cross-atomization process, and cure and dry;

3) The construction of the finishing layer.
9. The method for integrated construction of external wall insulation, waterproof and decoration according to claim 9, characterized in that: in step 2), the waterproof layer is sprayed with a wet film thickness of 3 to 4 mm.