Waterproof backing plate bonding mortar and preparation method thereof
By combining epoxy-acrylic composite emulsion with inorganic materials, a high-strength and high-flexibility waterproof backing board bonding mortar was prepared, which solved the problem of insufficient strength and flexibility in the existing technology, improved the flexural strength and deformation capacity, and has the characteristics of waste utilization and energy saving.
Patent Information
- Application Number
- CN202511822965.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-05
- Publication Date
- 2026-03-13
AI Technical Summary
The existing waterproof backing board adhesive mortar has insufficient strength and flexibility, and cannot effectively resist the stress caused by the deformation of the base layer.
A waterproof backing board bonding mortar was prepared by combining epoxy-acrylic composite emulsion with inorganic materials such as silicate cement, quartz sand, silica powder, fly ash, water-retaining agent and thixotropic agent. The synergistic effect of epoxy-acrylic composite emulsion and powder enhances the high strength and high flexibility of the material.
It achieves a combination of high strength and high flexibility, enhances flexural strength and deformation capacity, effectively resists stress caused by base layer cracking, and the raw materials have the advantages of waste utilization and energy saving.
Smart Images
Figure CN121651808A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of adhesive mortar for board panels, and more particularly to an adhesive mortar for waterproof backing boards and its preparation method. Background Technology
[0002] With increasingly stringent requirements for building waterproofing, fully bonded waterproof membrane systems are widely used due to their effectiveness in preventing moisture leakage and strong resistance to wind uplift. The core material of this system is the adhesive mortar used to bond the waterproof membrane to the substrate. This material not only needs excellent bonding performance but also a certain degree of flexibility to adapt to substrate deformation, while also forming a reliable waterproof barrier itself.
[0003] Currently, most waterproof backing adhesive mortars on the market use polymer-modified single-component cement-based mortar. However, these existing waterproof backing board adhesive mortars have problems with insufficient strength and flexibility. Summary of the Invention
[0004] The purpose of this invention is to provide a waterproof backing board bonding mortar and its preparation method. The prepared waterproof backing board bonding mortar has the advantages of high strength and high flexibility.
[0005] To achieve the above objectives, in a first aspect, the present invention provides a method for preparing waterproof backing board adhesive mortar, comprising: Prepare the first component powder; Preparation of the second component liquid; The first component powder and the second component liquid are mixed to prepare waterproof backing board adhesive mortar.
[0006] The specific steps for preparing the first component powder include: Prepare silicate cement, quartz sand, silica fume, fly ash, water-retaining agent, and thixotropic agent in the specified proportions for later use; Fly ash is premixed with a portion of quartz sand to obtain premixed sand. The silicate cement, the remaining quartz sand, silica fume, water-retaining agent, and thixotropic agent are put into the mixer and mixed. Add the premixed sand to the mixer and mix it together with all the powders until they are evenly mixed to obtain the first component powder.
[0007] Among the steps, preparing silicate cement, quartz sand, silica fume, fly ash, water-retaining agent, and thixotropic agent in the specified proportions is as follows: By weight, the components are 35-45 parts silicate cement, 30-40 parts quartz sand, 15-25 parts silica fume, 1-5 parts fly ash, 0.1-0.3 parts water-retaining agent, and 0.3-0.7 parts thixotropic agent.
[0008] The water-retaining agent is hydroxypropyl methylcellulose.
[0009] The specific steps for preparing the second component liquid include: Prepare epoxy-acrylic composite emulsion, water, and defoamer in the specified proportions for later use. The epoxy-acrylic composite emulsion, water, and defoamer are stirred and mixed until homogeneous to obtain the second component liquid.
[0010] In the step of preparing epoxy-acrylic composite emulsion, water, and defoamer in the specified proportions, By weight, the components are 85-95 parts epoxy-acrylic composite emulsion, 5-15 parts water, and 0.3-0.7 parts defoamer.
[0011] Secondly, the present invention also provides a waterproof backing board bonding mortar, which is prepared by the aforementioned method for preparing waterproof backing board bonding mortar.
[0012] This invention discloses a waterproof backing board bonding mortar and its preparation method, comprising a first component powder and a second component liquid. The first component powder includes silicate cement, quartz sand, silica fume, fly ash, water-retaining agent, and thixotropic agent. The second component liquid includes epoxy-acrylic composite emulsion, water, and defoamer. By using epoxy-acrylic composite emulsion as the liquid component, its synergistic effect with the first component powder enables the waterproof backing board bonding mortar material to maintain the high strength of inorganic materials while possessing high flexibility, significantly improving flexural strength and deformation capacity, and effectively resisting the stress caused by cracking of the substrate. The raw materials used are silicate cement, quartz sand, silica fume, fly ash, water-retaining agent, and thixotropic agent, which has the advantages of waste utilization, waterproofing, and energy saving. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.
[0014] Figure 1 This is a flowchart of a method for preparing adhesive mortar for waterproof backing boards according to the present invention.
[0015] Figure 2 This is a flowchart of the preparation of the first component powder according to the present invention.
[0016] Figure 3 This is a flowchart of the preparation of the second component liquid material according to the present invention.
[0017] Figure 4 This is a flowchart of the present invention, which describes the process of mixing the first component powder and the second component liquid to prepare a waterproof backing board adhesive mortar. Detailed Implementation
[0018] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.
[0019] Firstly, please refer to Figures 1-4 ,in, Figure 1 This is a flowchart of a method for preparing adhesive mortar for waterproof backing boards according to the present invention; Figure 2 This is a flowchart of the preparation of the first component powder according to the present invention; Figure 3 This is a flowchart of the preparation of the second component liquid material according to the present invention; Figure 4 This is a flowchart of the present invention, which describes the process of mixing the first component powder and the second component liquid to prepare a waterproof backing board adhesive mortar.
[0020] This invention provides a method for preparing adhesive mortar for waterproof backing boards, comprising: S1 prepares the first component powder; The specific steps include: S11 Prepare silicate cement, quartz sand, silica fume, fly ash, water-retaining agent and thixotropic agent in proportion for later use; In this step, by weight, the components are as follows: 35-45 parts silicate cement, 30-40 parts quartz sand, 15-25 parts silica fume, 1-5 parts fly ash, 0.1-0.3 parts water-retaining agent, and 0.3-0.7 parts thixotropic agent. The water-retaining agent is hydroxypropyl methylcellulose.
[0021] S12 involves premixing fly ash with a portion of quartz sand to obtain premixed sand. S13 involves mixing silicate cement, remaining quartz sand, silica fume, water-retaining agent, and thixotropic agent in a mixer. S14 adds the premixed sand to the mixer and mixes it together with all the powders until they are evenly mixed to obtain the first component powder.
[0022] In this embodiment of the invention, the raw steel slag powder is ultra-finely ground using an air jet mill, and the process parameters are controlled to ensure that its specific surface area reaches ≥ 600 m². 2 / kg, then subjected to iron removal treatment by a strong magnetic separator to obtain qualified silica powder for later use. Weigh a predetermined amount of pre-synthesized fly ash for later use. Weigh 10%-20% of the total weight of quartz sand (i.e., a portion of the total quartz sand usage) and add it together with all the fly ash prepared in step S12 into a small high-speed mixer. After closing the hopper, start mixing to ensure that the nanoparticles are fully carried and dispersed by the quartz sand, forming a uniform premixed sand material. Discharge and set aside. Add the ordinary silicate cement, the remaining quartz sand, the pretreated silica powder, and the water-retaining agent (hydroxypropyl methylcellulose) and thixotropic agent (attapulgite) into a large zero-gravity mixer. Start the mixer and mix at low speed to make all the basic powder materials initially uniform. Slowly add the prepared premixed sand material into the main mixer that is mixing at low speed through the feeding port, and mix all the powder materials together until the entire batch of powder materials has a uniform color and no visible color difference or lumps, thus obtaining the first component powder material.
[0023] S2 prepares the second component liquid; The specific steps include: S21 Prepare epoxy-acrylic composite emulsion, water and defoamer in the specified proportions for later use; In this step, by weight, the components are 85-95 parts epoxy-acrylic composite emulsion, 5-15 parts water, and 0.3-0.7 parts defoamer. The preparation method of the epoxy-acrylic composite emulsion includes: preparing an acrylate seed emulsion via emulsion polymerization; using the seed emulsion as an emulsifier to emulsify the epoxy resin to form a composite emulsion; adjusting the pH and solid content of the composite emulsion to finally obtain an epoxy-acrylic composite emulsion with a solid content of 46%~50%.
[0024] S22 mixes epoxy-acrylic composite emulsion, water, and defoamer until homogeneous to obtain the second component liquid.
[0025] In this embodiment of the invention, a specified amount of epoxy-acrylic composite emulsion is first added to a mixing tank equipped with a slow stirring device. While continuously stirring, a specified amount of water is slowly added for dilution. After the emulsion and water are mixed evenly, a specified amount of defoamer is slowly added, and then stirring is continued until the liquid is mixed evenly, without layering or a large amount of foam, thus obtaining the second component liquid.
[0026] S3 mixes the first component powder and the second component liquid to prepare waterproof backing board adhesive mortar; The specific steps include: S31 Weigh out the prepared first component powder and second component liquid at a weight ratio of 3.5~4.5:1. S32 The weighed first component powder and the second component liquid are stirred and mixed together until a uniform paste without dry powder particles is formed; After the S33 paste is left to stand and mature, a waterproof backing board bonding mortar is obtained.
[0027] In this embodiment of the invention, the first component powder and the second component liquid are weighed according to a weight ratio of 4:1. The weighed second component liquid and the first component powder are mixed evenly until a paste-like mortar with uniform color and texture and no dry powder particles is obtained. Stirring is stopped and the paste-like mortar is left to stand. This process is called "curing". The polymer and additives are allowed to fully wet the powder particles. After curing, the waterproof backing board bonding mortar is obtained.
[0028] The present invention discloses a method for preparing waterproof backing board adhesive mortar. By using epoxy-acrylic composite emulsion as liquid component, which works synergistically with the first component powder, the waterproof backing board adhesive mortar material retains the high strength of inorganic materials while possessing high flexibility, significantly improving flexural strength and deformation capacity, and effectively resisting the stress caused by cracking of the base layer.
[0029] Secondly, the present invention also provides a waterproof backing board bonding mortar, which is prepared by the aforementioned method for preparing waterproof backing board bonding mortar.
[0030] This invention discloses a waterproof backing board bonding mortar, comprising a first component powder and a second component liquid. The first component powder includes silicate cement, quartz sand, silica fume, fly ash, water-retaining agent, and thixotropic agent. The second component liquid includes epoxy-acrylic composite emulsion, water, and defoamer. By using epoxy-acrylic composite emulsion as the liquid component, its synergistic effect with the first component powder enables the waterproof backing board bonding mortar material to maintain the high strength of inorganic materials while possessing high flexibility, significantly improving flexural strength and deformation capacity, and effectively resisting stress caused by substrate cracking. The raw materials used are silicate cement, quartz sand, silica fume, fly ash, water-retaining agent, and thixotropic agent, which has the advantages of waste utilization, waterproofing, and energy saving.
[0031] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.
Claims
1. A method for preparing adhesive mortar for waterproof backing boards, characterized in that, include: Prepare the first component powder; Preparation of the second component liquid; The first component powder and the second component liquid are mixed to prepare waterproof backing board adhesive mortar.
2. The method for preparing the waterproof backing board bonding mortar as described in claim 1, characterized in that, The specific steps for preparing the first component powder include: Prepare silicate cement, quartz sand, silica fume, fly ash, water-retaining agent, and thixotropic agent in the specified proportions for later use; Fly ash is premixed with a portion of quartz sand to obtain premixed sand. The silicate cement, the remaining quartz sand, silica fume, water-retaining agent, and thixotropic agent are put into the mixer and mixed. Add the premixed sand to the mixer and mix it together with all the powders until they are evenly mixed to obtain the first component powder.
3. The method for preparing the waterproof backing board bonding mortar as described in claim 2, characterized in that, In the steps of preparing silicate cement, quartz sand, silica fume, fly ash, water-retaining agent, and thixotropic agent in the specified proportions, By weight, the components are 35-45 parts silicate cement, 30-40 parts quartz sand, 15-25 parts silica fume, 1-5 parts fly ash, 0.1-0.3 parts water-retaining agent, and 0.3-0.7 parts thixotropic agent.
4. The method for preparing the waterproof backing board bonding mortar as described in claim 3, characterized in that, The water-retaining agent is hydroxypropyl methylcellulose.
5. The method for preparing the waterproof backing board bonding mortar as described in claim 4, characterized in that, The specific steps for preparing the second component liquid include: Prepare epoxy-acrylic composite emulsion, water, and defoamer in the specified proportions for later use. The epoxy-acrylic composite emulsion, water, and defoamer are stirred and mixed until homogeneous to obtain the second component liquid.
6. The method for preparing the waterproof backing board bonding mortar as described in claim 5, characterized in that, In the step of preparing the epoxy-acrylic composite emulsion, water, and defoamer in the specified proportions, By weight, the components are 85-95 parts epoxy-acrylic composite emulsion, 5-15 parts water, and 0.3-0.7 parts defoamer.
7. A waterproof backing board bonding mortar, characterized in that, It is prepared using the method for preparing waterproof backing board adhesive mortar as described in any one of claims 1-6.