Composition for concrete waterproofing and protection cap interface agent, concrete waterproofing and protection cap interface agent, and method for preparing the same

Abstract

The present application relates to concrete waterproof technical field, disclose a composition for concrete waterproof protective cover surface interface agent, concrete waterproof protective cover surface interface agent and its preparation method, the composition contains main agent and adjuvant, the main agent includes silicone acrylic emulsion, phosphate solution, filler sand, aluminum silicate fiber, wax powder and polydimethylsiloxane, the total weight of the composition is taken as the basis, the content of the silicone acrylic emulsion is 45wt%-55wt%, the content of the phosphate solution is 15wt%-20wt%, the content of the filler sand is 5wt%-8wt%, the content of the aluminum silicate fiber is 3wt%-5wt%, the content of the wax powder is 3wt%-5wt%, the content of the polydimethylsiloxane is 1wt%-1.5wt%. The concrete waterproof protective cover surface interface agent obtained by the composition has very high bonding strength to the cement base layer, and does not have the problems of blistering and peeling.

Description

Technical Field

[0001] This invention relates to the field of concrete waterproofing technology, specifically to a composition for a concrete waterproofing protective cover interface agent, a concrete waterproofing protective cover interface agent, and a method for preparing the same. Background Technology

[0002] Residential buildings and self-built houses in rural areas generally have concrete roofs. These roofs are concrete structures with high surface porosity and high water absorption, making them very prone to leaks and seepage during the rainy season.

[0003] The above-mentioned leakage problem is usually solved by using high-elasticity waterproof coatings for roofing.

[0004] High-elasticity waterproof coatings are generally made from low-Tg acrylic emulsions and powders. However, acrylic emulsions wilt in high-temperature environments, which not only makes the roof sticky when people walk on it, but also makes the surface of the coating prone to dust accumulation after the paint film is formed, resulting in graying or yellowing, thus affecting its appearance.

[0005] Furthermore, acrylic coatings are organic film-forming substances, which have poor affinity for cement concrete substrates, resulting in low bonding strength with cement; they can also cause problems such as blistering of the paint film, large bubbles, and large-scale peeling of the paint film.

[0006] The film-forming substances in roof coatings will gradually turn powdery due to prolonged exposure to external oxidation, temperature changes, and ultraviolet radiation, and their service life will be greatly reduced.

[0007] Therefore, there is an urgent need to develop a multifunctional interface material to solve the problems of poor adhesion of traditional roof waterproof coatings to cement substrates, easy peeling, and wilting. Summary of the Invention

[0008] The purpose of this invention is to overcome the problems of poor adhesion of existing roof waterproof coatings to cement substrates and easy peeling and detachment.

[0009] To achieve the above objectives, a first aspect of the present invention provides a composition for a concrete waterproof protective cover interface agent, the composition containing a main agent and an auxiliary agent, wherein the main agent includes silicone acrylic emulsion, phosphate solution, filler sand, aluminum silicate fiber, wax powder and polydimethylsiloxane;

[0010] Based on the total weight of the composition, the content of the silicone-acrylic emulsion is 45wt%-55wt%, the content of the phosphate solution is 15wt%-20wt%, the content of the filler sand is 5wt%-8wt%, the content of the aluminum silicate fiber is 3wt%-5wt%, the content of the wax powder is 3wt%-5wt%, and the content of the polydimethylsiloxane is 1wt%-1.5wt%.

[0011] The mass ratio of the silicone-acrylic emulsion to the phosphate solution is 1:0.3-0.35;

[0012] The solid content of the silicone-acrylic emulsion is 40wt%-50wt%, and the solid content of the phosphate solution is >40wt%.

[0013] The kinematic viscosity of the polydimethylsiloxane at 25°C is ≤100 cSt.

[0014] A second aspect of the present invention provides a method for preparing a concrete waterproof protective overlay interface agent, the method comprising using the components of the composition described in the first aspect above, including:

[0015] The components in the main agent and the components in the auxiliary agent are mixed together to obtain the concrete waterproof protective cover interface agent.

[0016] The third aspect of the present invention provides a concrete waterproof protective cover interface agent prepared by the method described in the second aspect above.

[0017] The concrete waterproof protective overlay interface agent composition provided by this invention is made by compounding a silicone-acrylic emulsion with a solid content of 40wt%-50wt% and a phosphate solution with a solid content of >40wt% in a specific mass ratio (1:0.3-0.35), and simultaneously combining filler sand, aluminum silicate fiber, wax powder, and polydimethylsiloxane with a kinematic viscosity of ≤100cSt at 25°C. This allows the obtained concrete waterproof protective overlay interface agent to be directly applied to the cement substrate without the need for an intermediate layer; no blistering or peeling problems occur after application; and the interface agent's extremely low water absorption rate provides effective waterproof protection for the cement substrate; and it has excellent resistance to artificial aging, showing no yellowing problem after more than 720 hours.

[0018] The method for preparing a concrete waterproof protective cover interface agent provided by this invention is simple, highly operable, and easy to industrialize. Detailed Implementation

[0019] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0020] As mentioned above, a first aspect of the present invention provides a composition for a concrete waterproof protective cover interface agent, the composition containing a main agent and an auxiliary agent, wherein the main agent includes silicone acrylic emulsion, phosphate solution, filler sand, aluminum silicate fiber, wax powder and polydimethylsiloxane;

[0021] Based on the total weight of the composition, the content of the silicone-acrylic emulsion is 45wt%-55wt%, the content of the phosphate solution is 15wt%-20wt%, the content of the filler sand is 5wt%-8wt%, the content of the aluminum silicate fiber is 3wt%-5wt%, the content of the wax powder is 3wt%-5wt%, and the content of the polydimethylsiloxane is 1wt%-1.5wt%.

[0022] The mass ratio of the silicone-acrylic emulsion to the phosphate solution is 1:0.3-0.35;

[0023] The solid content of the silicone-acrylic emulsion is 40wt%-50wt%, and the solid content of the phosphate solution is >40wt%.

[0024] The kinematic viscosity of the polydimethylsiloxane at 25°C is ≤100 cSt.

[0025] During their research, the inventors of this invention discovered that by compounding a specific organic emulsion (a silicone-acrylic emulsion with a solid content of 40wt%-50wt%) with a phosphate solution with a solid content >40wt% at a mass ratio of 1:0.3-0.35, and adding the aforementioned polydimethylsiloxane with specific properties, and limiting the content of each component, a concrete waterproof protective overlay interface agent with excellent comprehensive performance can be obtained. The inventors believe the possible reasons for achieving this effect are as follows:

[0026] This invention utilizes an organic emulsion and inorganic phosphate in an organic-inorganic composite form, giving the material both the high wear resistance and hardness of inorganic materials and their affinity for cement substrates, as well as the toughness of organic materials. This makes it suitable for exposed rooftops where people walk on it and objects press against it. Furthermore, this material can be directly applied to a cement substrate without the need for an intermediate layer. The material has high hardness, is non-sticky, and has high bonding strength, effectively solving the problems of traditional roof waterproofing coatings being very sticky, having low bonding strength with cement, and exhibiting issues such as blistering, large bubbles, and large-scale peeling of the paint film after formation. The material also has hydrophobic properties, preventing dust from adhering to the coating surface; rainwater can clean the surface itself. Additionally, the material has a matte finish and reduces thermal conductivity.

[0027] Preferably, the glass transition temperature (Tg) of the silicone-acrylic emulsion is greater than 25°C. The inventors of this invention have discovered that, under this preferred condition, the obtained concrete waterproof protective cover interface agent exhibits superior mechanical properties.

[0028] According to a preferred embodiment, the aluminosilicate fibers have a length of 5-10 μm and an oil absorption value of 2-4 mL / g. The inventors of this invention have discovered that, under this preferred condition, the obtained concrete waterproof protective cover interface agent exhibits superior heat insulation and matting properties.

[0029] In a preferred embodiment, the phosphate solution is an aluminum dihydrogen phosphate solution and / or a zinc dihydrogen phosphate solution.

[0030] Preferably, the filler sand is quartz sand and / or calcium sand, and the average particle diameter of the filler sand is 100-200 μm.

[0031] In a preferred embodiment, the wax powder is paraffin and / or beeswax.

[0032] In a preferred embodiment, the additives include film-forming agents, leveling agents, thickeners, preservatives, and defoamers;

[0033] Based on the total weight of the composition, the content of the film-forming aid is 2wt%-3wt%, the content of the leveling agent is 0.5wt%-0.8wt%, the content of the thickener is 0.2wt%-0.3wt%, the content of the preservative is 0.2wt%-0.3wt%, and the content of the defoamer is 0.1wt%-0.2wt%.

[0034] Preferably, the film-forming aid is a dodecyl alcohol ester.

[0035] In a preferred embodiment, the leveling agent is a polycarboxylate leveling agent.

[0036] Preferably, the thickener is a polyurethane thickener;

[0037] In a preferred embodiment, the defoamer is an organosilicone defoamer and / or a mineral oil defoamer.

[0038] According to another preferred embodiment, the adjuvant further includes water, the water content being 12wt%-15wt% based on the total weight of the composition.

[0039] It should be noted that the present invention does not have any special requirements for the type of water, and those skilled in the art can select it as needed. The present invention will not elaborate further here, and those skilled in the art should not understand that this is a limitation of the present invention.

[0040] As previously described, a second aspect of the present invention provides a method for preparing a concrete waterproof protective overlay interface agent, the method comprising using the components of the composition described in the first aspect above, including:

[0041] The components in the main agent and the components in the auxiliary agent are mixed together to obtain the concrete waterproof protective cover interface agent.

[0042] Preferably, the contact mixing operation is performed in a disperser.

[0043] According to a preferred embodiment, the step of contact mixing of the components in the main agent and the components in the auxiliary agent includes:

[0044] (1) The silicone-acrylic emulsion, polydimethylsiloxane, film-forming aid, leveling agent and defoamer are first stirred and mixed to obtain mixture I;

[0045] (2) Mixture I, filler sand, aluminum silicate fiber and wax powder are mixed by a second stirring to obtain mixture II;

[0046] (3) In the presence of water, the mixture II, phosphate solution, thickener and preservative are mixed for the third time to obtain the concrete waterproof protective cover interface agent.

[0047] In a preferred embodiment, in step (1), the conditions for the first stirring and mixing include: a rotation speed of 500-600 rpm and a time of 5-10 min.

[0048] Preferably, the conditions for the second stirring and mixing include: a rotation speed of 800-1000 rpm and a time of 20-25 min.

[0049] In a preferred embodiment, the conditions for the third stirring and mixing include: a rotation speed of 600-800 rpm and a time of 10-20 min.

[0050] As previously stated, the third aspect of the present invention provides a concrete waterproof protective cover interface agent prepared by the method described in the second aspect above.

[0051] The present invention will be described in detail below through examples. In the following examples, unless otherwise specified, all instruments and raw materials used are commercially available products.

[0052] Silicone-acrylic emulsion:

[0053] Silicone-acrylic emulsion I: solid content 47±1wt%, glass transition temperature Tg 28℃, purchased from Foshan Shunde Badefu Industrial Co., Ltd., grade 996AD.

[0054] Silicone-acrylic emulsion II: solid content 40±1wt%, glass transition temperature Tg 25℃, purchased from Guangdong Yinyang Environmental Protection Materials Co., Ltd., grade 8392-1.

[0055] Phosphate solution:

[0056] Phosphate solution I: Aluminum dihydrogen phosphate solution, solid content 41 wt%. Purchased from Jinan Weizhen Chemical Co., Ltd., grade WZ98012.

[0057] Aluminosilicate fiber:

[0058] Aluminosilicate fiber I: 5~10μm in length, oil absorption value of 2~4mL / g, purchased from Lingshou County Dianjin Mineral Products Processing Plant, custom-made.

[0059] Alumina silicate fiber II: 15~20μm in length, oil absorption value of 1-1.5mL / g, purchased from Lingshou County Yingwang Building Materials Co., Ltd., custom-made.

[0060] Filler sand: Quartz sand with an average particle diameter of 150μm, purchased from Shuntian Mineral Products Processing Plant in Lingshou County.

[0061] Wax powder: Paraffin wax, purchased from Shijiazhuang Jinhe Nano Chemical Co., Ltd., brand name: Microcrystalline Wax Powder No. 60.

[0062] Polydimethylsiloxane:

[0063] Polydimethylsiloxane I: kinematic viscosity of 20 cSt at 25°C, purchased from Guangzhou Baiyu Biotechnology Co., Ltd.

[0064] Polydimethylsiloxane (DI): kinematic viscosity at 25°C is 180 cSt, purchased from Guangzhou Baiyu Biotechnology Co., Ltd.

[0065] Film-forming aid: Dodecyl alcohol ester.

[0066] Leveling agent: polycarboxylate, purchased from Dow Chemical China Ltd., brand name POWERBLOX D-305.

[0067] Thickener: Polyurethane thickener, purchased from Wanhua Chemical Group Co., Ltd., brand name U505.

[0068] Defoamer: Organosilicon defoamer, purchased from Dongguan Haoyouduo New Materials Co., Ltd., brand name D-001.

[0069] Preservative: Purchased from Jinan Kason Chemical Co., Ltd., brand name Kason Preservative 15.

[0070] Unless otherwise specified, each part by weight in the following examples is 10g.

[0071] Example 1

[0072] This embodiment refers to the formulation in Table 1 of the instruction manual, and prepares the concrete waterproof protective cover interface agent according to the method including the following steps:

[0073] (1) In a disperser, silicone-acrylic emulsion, polydimethylsiloxane, film-forming aid, leveling agent and defoamer are first stirred and mixed to obtain mixture I;

[0074] (2) Mixture I, filler sand, aluminum silicate fiber and wax powder are mixed by a second stirring to obtain mixture II;

[0075] (3) In the presence of water, the mixture II, phosphate solution, thickener and preservative are mixed by a third stirring to obtain the concrete waterproof protective cover interface agent;

[0076] The first mixing conditions were: 600 rpm for 8 minutes.

[0077] The second mixing conditions were: 1000 rpm for 20 minutes.

[0078] The third mixing condition is: 800 rpm for 15 minutes.

[0079] Example 2

[0080] This embodiment uses a similar method to Example 1, except for the following: formulation;

[0081] See Table 2 for details. Any parts not listed are the same as in Example 1, and a concrete waterproof protective cover interface agent is prepared.

[0082] Example 3

[0083] This embodiment uses a method similar to that of Embodiment 1, except that silicone-acrylic emulsion I in Embodiment 1 is replaced with an equal weight of silicone-acrylic emulsion II;

[0084] For any parts not listed, the same as in Example 1 were used to prepare a concrete waterproof protective cover interface agent.

[0085] Example 4

[0086] This embodiment uses a method similar to that of Embodiment 1, except that aluminum silicate fiber I in Embodiment 1 is replaced with an equal weight of aluminum silicate fiber II;

[0087] For any parts not listed, the same as in Example 1 were used to prepare a concrete waterproof protective cover interface agent.

[0088] Unless otherwise specified, Comparative Examples 1-2 were carried out using methods similar to those in the Examples, except that the formulations were as shown in Table 1, and the unlisted parts were the same as in Example 1, to prepare a concrete waterproof protective cover interface agent.

[0089] Table 1

[0090]

[0091] Comparative Example 3

[0092] This comparative example was conducted using a method similar to that of Example 1, except that the polydimethylsiloxane I in Example 1 was replaced with an equal part by weight of polydimethylsiloxane DI.

[0093] For any parts not listed, the same as in Example 1 were used to prepare a concrete waterproof protective cover interface agent.

[0094] Comparative Example 4

[0095] This comparative example was conducted using a method similar to that of Example 1, except that the mass ratio of the silicone-acrylic emulsion and the phosphate solution was adjusted to 1:0.2 while keeping the total weight of the silicone-acrylic emulsion and the phosphate solution constant.

[0096] For any parts not listed, the same as in Example 1 were used to prepare a concrete waterproof protective cover interface agent.

[0097] Test case

[0098] The performance of the concrete waterproof protective overlay interface agents prepared in the above examples was tested using the following test methods:

[0099] (1) Mechanical properties were tested in accordance with the requirements of JGT 468-2015 for interface treatment agents for walls;

[0100] (2) The artificial aging resistance test shall be conducted in accordance with the provisions of Cycle A in GB / T 1865-2009;

[0101] (3) The wear resistance ratio and surface strength shall be tested in accordance with the provisions of JC / T906-2002 Type I;

[0102] The test results are shown in Table 2 below.

[0103] Table 2

[0104]

[0105] Continued from Table 2

[0106]

[0107] The results above show that the concrete waterproof protective coating interface agent prepared by the composition provided by the present invention can be directly applied to the cement substrate without the need for an intermediate layer; no blistering or peeling will occur after application; and the extremely low water absorption rate of the interface agent provides effective waterproof protection for the cement substrate; and it has excellent resistance to artificial aging, and will not turn yellow after more than 720 hours.

[0108] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A composition for a concrete waterproof protective cover interface agent, characterized in that, The composition contains a main agent and an auxiliary agent, wherein the main agent includes silicone-acrylic emulsion, phosphate solution, filler sand, aluminum silicate fiber, wax powder and polydimethylsiloxane; Based on the total weight of the composition, the content of the silicone-acrylic emulsion is 45wt%-55wt%, the content of the phosphate solution is 15wt%-20wt%, the content of the filler sand is 5wt%-8wt%, the content of the aluminum silicate fiber is 3wt%-5wt%, the content of the wax powder is 3wt%-5wt%, and the content of the polydimethylsiloxane is 1wt%-1.5wt%. The mass ratio of the silicone-acrylic emulsion to the phosphate solution is 1:0.3-0.35; The solid content of the silicone-acrylic emulsion is 40wt%-50wt%, and the solid content of the phosphate solution is >40wt%. The kinematic viscosity of the polydimethylsiloxane at 25°C is ≤100 cSt.

2. The composition according to claim 1, characterized in that, The glass transition temperature (Tg) of the silicone-acrylic emulsion is greater than 25°C.

3. The composition according to claim 1 or 2, characterized in that, The aluminum silicate fiber has a length of 5~10μm and an oil absorption value of 2~4mL / g.

4. The composition according to claim 1 or 2, characterized in that, The phosphate solution is an aluminum dihydrogen phosphate solution and / or a zinc dihydrogen phosphate solution; And / or, the filler sand is quartz sand and / or calcium sand, and the average particle diameter of the filler sand is 100-200 μm; And / or, the wax powder is paraffin and / or beeswax.

5. The composition according to claim 1 or 2, characterized in that, The additives include film-forming agents, leveling agents, thickeners, preservatives, and defoamers; Based on the total weight of the composition, the content of the film-forming aid is 2wt%-3wt%, the content of the leveling agent is 0.5wt%-0.8wt%, the content of the thickener is 0.2wt%-0.3wt%, the content of the preservative is 0.2wt%-0.3wt%, and the content of the defoamer is 0.1wt%-0.2wt%.

6. The composition according to claim 5, characterized in that, The film-forming aid is alcohol ester dodecyl; And / or, the leveling agent is a polycarboxylate leveling agent; And / or, the thickener is a polyurethane thickener; And / or, the defoamer is an organosilicone defoamer and / or a mineral oil defoamer.

7. A method for preparing a concrete waterproof protective overlay interface agent, characterized in that, This method is performed using any of the components in the composition according to any one of claims 1-6, comprising: The components in the main agent and the components in the auxiliary agent are mixed together to obtain the concrete waterproof protective cover interface agent.

8. The method according to claim 7, characterized in that, The steps of contact mixing of the components in the main agent and the components in the auxiliary agent include: (1) The silicone-acrylic emulsion, polydimethylsiloxane, film-forming aid, leveling agent and defoamer are first stirred and mixed to obtain mixture I; (2) Mixture I, filler sand, aluminum silicate fiber and wax powder are mixed by a second stirring to obtain mixture II; (3) In the presence of water, the mixture II, phosphate solution, thickener and preservative are mixed for the third time to obtain the concrete waterproof protective cover interface agent.

9. The method according to claim 8, characterized in that, In step (1), the conditions for the first stirring and mixing include: a rotation speed of 500-600 rpm and a time of 5-10 min; And / or, the conditions for the second stirring and mixing include: a rotation speed of 800-1000 rpm and a time of 20-25 min; And / or, the conditions for the third stirring and mixing include: a rotation speed of 600-800 rpm and a time of 10-20 min.

10. A concrete waterproof protective coating interface agent prepared by the method according to any one of claims 7-9.

Images