Acrylic polymer waterproof and breathable material and preparation method thereof

Abstract

The invention relates to the technical field of waterproof materials, and proposes an acrylic polymer waterproof breathable material and a preparation method thereof. The acrylic polymer waterproof breathable material comprises component A and component B; component A comprises the following components in parts by weight: 50-80 parts of acrylic emulsion, 1-2 parts of defoamer, and 1-3 parts of dispersant; component B comprises the following components in parts by weight: 25-35 parts of cement, 10-40 parts of modified mesoporous silica, and 10-20 parts of quartz powder; the raw materials of the modified mesoporous silica include mesoporous silica and epoxy-modified silicone resin; the weight ratio of mesoporous silica to epoxy-modified silicone resin is 1-19:1. Through the above technical scheme, the problems of poor waterproofness, poor air permeability and poor mechanical properties of the acrylic polymer waterproof breathable material in the related art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of waterproof materials, and in particular to an acrylic polymer waterproof and breathable material and a preparation method thereof. Background Art

[0002] Acrylic polymer waterproofing material is an important waterproofing material that can maintain stable performance over a wide temperature range, thus ensuring the stability of the waterproofing effect of the waterproofing material. In addition, acrylic polymer waterproofing material has high elasticity and ductility, thereby reducing the damage to the waterproof layer caused by changes in the base layer, and can improve the durability and reliability of the waterproofing material. Due to its various excellent properties, acrylic polymer waterproofing materials occupy an important position in the field of building waterproofing, such as roofing, wall and other building waterproofing engineering fields, kitchen, bathroom and other home decoration waterproofing fields, as well as tunnels, bridges and other infrastructure waterproofing fields.

[0003] However, with the increasing demand for building waterproofing, the water resistance of waterproof materials needs to be improved, and the current acrylic polymer waterproof materials have poor air permeability. After being used for building exterior walls, if there is no air permeability, it will cause hidden dangers to the safety and durability of the exterior walls. At the same time, the waterproofness and mechanical properties of acrylic polymer waterproof materials are poor, thereby reducing the service life of acrylic polymer waterproof materials. Therefore, it is of great significance to develop an acrylic polymer waterproof material with good waterproofness, good air permeability, and excellent mechanical properties. Summary of the invention

[0004] The invention provides an acrylic polymer waterproof and breathable material and a preparation method thereof, which solves the problems of poor waterproofness, poor air permeability and poor mechanical properties of the acrylic polymer waterproof and breathable material in the related art.

[0005] The technical solution of the present invention is as follows:

[0006] The present invention provides an acrylic polymer waterproof and breathable material, comprising component A and component B;

[0007] The component A comprises the following components in parts by weight: 50-80 parts of acrylic emulsion, 1-2 parts of defoamer, and 1-3 parts of dispersant;

[0008] The component B comprises the following components in parts by weight: 25-35 parts of cement, 10-40 parts of modified mesoporous silica, and 10-20 parts of quartz powder;

[0009] The raw materials of the modified mesoporous silica include mesoporous silica and epoxy-modified organic silicone resin; the weight ratio of the mesoporous silica to the epoxy-modified organic silicone resin is 1-19:1.

[0010] As a further technical solution, the weight ratio of the mesoporous silica to the epoxy-modified silicone resin is 8-17:1.

[0011] When the weight ratio of mesoporous silica to epoxy-modified silicone resin is 8-17:1, the air permeability and mechanical properties of the acrylic polymer waterproof and breathable material can be further improved.

[0012] As a further technical solution, the preparation method of the modified mesoporous silica includes the following steps: dissolving epoxy-modified silicone resin in toluene to obtain an epoxy-modified silicone resin solution, adding mesoporous silica to the epoxy-modified silicone resin solution, dispersing evenly, concentrating, and drying to obtain modified mesoporous silica.

[0013] As a further technical solution, the mass fraction of the epoxy-modified silicone resin solution is 6% to 10%.

[0014] As a further technical solution, the raw material of the modified mesoporous silica also includes titanyl sulfate.

[0015] Mesoporous silica is modified by using titanyl sulfate and epoxy-modified silicone resin. The mechanical properties of acrylic polymer waterproof and breathable materials can be further improved by using mesoporous silica, titanyl sulfate and epoxy-modified silicone resin together.

[0016] As a further technical solution, the weight ratio of the mesoporous silica, epoxy-modified silicone resin and titanyl sulfate is 7-16:1.5:0.5.

[0017] When the weight ratio of mesoporous silica, epoxy-modified silicone resin and titanyl sulfate is 7-16:1.5:0.5, the mechanical properties of the acrylic polymer waterproof and breathable material can be further improved.

[0018] As a further technical solution, the preparation method of the modified mesoporous silica comprises the following steps:

[0019] A1, dissolving the epoxy-modified silicone resin in toluene to obtain an epoxy-modified silicone resin solution;

[0020] A2. The mesoporous silica and the titanyl sulfate are mixed, calcined, cooled, added into the epoxy-modified silicone resin solution, dispersed evenly, concentrated, and dried to obtain modified mesoporous silica.

[0021] As a further technical solution, in step A1, the mass fraction of the epoxy-modified silicone resin solution is 8% to 15%.

[0022] As a further technical solution, in step A2, the calcination is carried out at a temperature of 500-600° C. and a time of 1-2 hours.

[0023] As a further technical solution, the weight ratio of the acrylic emulsion to the modified mesoporous silica is 1.5~2:1.

[0024] When the weight ratio of acrylic emulsion and modified mesoporous silica is 1.5~2:1, the weight ratio of acrylic emulsion in component A and modified mesoporous silica in component B can be reasonably adjusted to optimize the synergistic effect of acrylic emulsion and modified mesoporous silica, thereby further improving the mechanical properties of acrylic polymer waterproof and breathable materials.

[0025] As a further technical solution, the defoaming agent is one or both of an organosilicon defoaming agent and a mineral oil defoaming agent; the dispersant is one or more of sodium hexametaphosphate, polyvinyl alcohol, and alkylphenol salt.

[0026] The present invention also provides a method for preparing an acrylic polymer waterproof and breathable material, comprising the following steps:

[0027] S1, mixing the components in the component A uniformly to obtain the component A;

[0028] S2, mixing the components in the component B uniformly to obtain the component B;

[0029] S3, mixing the component A and the component B to obtain an acrylic polymer waterproof and breathable material.

[0030] As a further technical solution, in step S3, during the mixing, the mass ratio of component A to component B is 1:1.

[0031] The working principle and beneficial effects of the present invention are:

[0032] In the present invention, component B of the acrylic polymer waterproof and breathable material includes modified mesoporous silica, and the mesoporous silica is modified by epoxy-modified organic silicone resin, which not only makes the acrylic polymer waterproof and breathable material have excellent air permeability, but also reduces the adsorption of water molecules on the surface of the mesoporous silica material, improves the waterproofness of the acrylic polymer waterproof and breathable material, and at the same time strengthens the effect with the acrylic emulsion in component A, enhances the overall compactness of the acrylic polymer waterproof and breathable material, thereby improving the mechanical properties of the acrylic polymer waterproof and breathable material. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the following examples and comparative examples, the model of acrylic emulsion is BIT-10; the model of cement is aluminate cement, model CA50-G6; the model of mesoporous silica is SBA-15, and the bulk density is 0.48 g / mL; the particle size of quartz powder is 80 μm; the model of epoxy-modified silicone resin is SMH-30; the model of silicone defoamer is SI2741; and the model of polyvinyl alcohol is PVA2099H.

[0035] Example 1

[0036] An acrylic polymer waterproof and breathable material, comprising component A and component B;

[0037] Component A includes the following components in parts by weight: 50 parts of acrylic emulsion, 1 part of silicone defoamer, and 1 part of polyvinyl alcohol;

[0038] Component B includes the following components in parts by weight: 25 parts of cement, 10 parts of modified mesoporous silica, and 10 parts of quartz powder;

[0039] The raw materials of modified mesoporous silica include 5 parts of mesoporous silica and 5 parts of epoxy-modified silicone resin;

[0040] The preparation method of modified mesoporous silica comprises the following steps: dissolving 5 parts of epoxy-modified silicone resin in toluene to obtain an epoxy-modified silicone resin solution with a mass fraction of 8%, adding 5 parts of mesoporous silica to the epoxy-modified silicone resin solution with a mass fraction of 8%, dispersing evenly, concentrating, and drying to obtain modified mesoporous silica;

[0041] The preparation method of acrylic polymer waterproof breathable material comprises the following steps:

[0042] S1. Mix the components in component A uniformly to obtain component A;

[0043] S2, mixing the components in component B uniformly to obtain component B;

[0044] S3. Component A and component B are mixed in a mass ratio of 1:1 to obtain an acrylic polymer waterproof and breathable material.

[0045] Example 2

[0046] An acrylic polymer waterproof and breathable material, comprising component A and component B;

[0047] Component A includes the following components in parts by weight: 52 parts of acrylic emulsion, 1.5 parts of silicone defoamer, and 2 parts of polyvinyl alcohol;

[0048] Component B includes the following components in parts by weight: 30 parts of cement, 36 parts of modified mesoporous silica, and 15 parts of quartz powder;

[0049] The raw materials of modified mesoporous silica include 30 parts of mesoporous silica and 6 parts of epoxy-modified silicone resin;

[0050] The preparation method of modified mesoporous silica comprises the following steps: dissolving 6 parts of epoxy-modified silicone resin in toluene to obtain an epoxy-modified silicone resin solution with a mass fraction of 8%, adding 30 parts of mesoporous silica to the epoxy-modified silicone resin solution with a mass fraction of 8%, dispersing evenly, concentrating, and drying to obtain modified mesoporous silica;

[0051] The preparation method of acrylic polymer waterproof breathable material comprises the following steps:

[0052] S1. Mix the components in component A uniformly to obtain component A;

[0053] S2, mixing the components in component B uniformly to obtain component B;

[0054] S3. Component A and component B are mixed in a mass ratio of 1:1 to obtain an acrylic polymer waterproof and breathable material.

[0055] Example 3

[0056] An acrylic polymer waterproof and breathable material, comprising component A and component B;

[0057] Component A includes the following components in parts by weight: 80 parts of acrylic emulsion, 2 parts of silicone defoamer, and 3 parts of polyvinyl alcohol;

[0058] Component B includes the following components in parts by weight: 35 parts of cement, 40 parts of modified mesoporous silica, and 20 parts of quartz powder;

[0059] The raw materials of modified mesoporous silica include 38 parts of mesoporous silica and 2 parts of epoxy-modified silicone resin;

[0060] The preparation method of modified mesoporous silica comprises the following steps: dissolving 2 parts of epoxy-modified silicone resin in toluene to obtain an epoxy-modified silicone resin solution with a mass fraction of 8%, adding 38 parts of mesoporous silica to the epoxy-modified silicone resin solution with a mass fraction of 8%, dispersing evenly, concentrating, and drying to obtain modified mesoporous silica;

[0061] The preparation method of acrylic polymer waterproof breathable material comprises the following steps:

[0062] S1. Mix the components in component A uniformly to obtain component A;

[0063] S2, mixing the components in component B uniformly to obtain component B;

[0064] S3. Component A and component B are mixed in a mass ratio of 1:1 to obtain an acrylic polymer waterproof and breathable material.

[0065] Example 4

[0066] The only difference between this embodiment and embodiment 2 is that in this embodiment, the raw materials of modified mesoporous silica include 35 parts of mesoporous silica and 1 part of epoxy-modified silicone resin.

[0067] Example 5

[0068] The only difference between this embodiment and embodiment 2 is that in this embodiment, the raw materials of modified mesoporous silica include 32 parts of mesoporous silica and 4 parts of epoxy-modified silicone resin.

[0069] Example 6

[0070] The only difference between this embodiment and embodiment 2 is that in this embodiment, the raw materials of modified mesoporous silica include 34 parts of mesoporous silica and 2 parts of epoxy-modified silicone resin.

[0071] Example 7

[0072] The only difference between this embodiment and embodiment 6 is that, in this embodiment, the raw materials of modified mesoporous silica include 34 parts of mesoporous silica and 2 parts of titanyl sulfate;

[0073] The preparation method of modified mesoporous silica comprises the following steps:

[0074] 34 parts of mesoporous silica and 2 parts of titanyl sulfate were mixed, calcined at 550° C. for 1.5 h, and cooled to obtain modified mesoporous silica.

[0075] Example 8

[0076] The only difference between this embodiment and embodiment 6 is that, in this embodiment, the raw materials of modified mesoporous silica include 26 parts of mesoporous silica, 7.5 parts of epoxy-modified silicone resin and 2.5 parts of titanyl sulfate;

[0077] The preparation method of modified mesoporous silica comprises the following steps:

[0078] A1. Dissolve 7.5 parts of epoxy-modified silicone resin in toluene to obtain an epoxy-modified silicone resin solution with a mass fraction of 8%;

[0079] A2. 26 parts of mesoporous silica and 2.5 parts of titanyl sulfate were mixed, calcined at 550°C for 1.5 hours, cooled, added to an 8% by mass epoxy modified silicone resin solution, dispersed evenly, concentrated, and dried to obtain modified mesoporous silica.

[0080] Example 9

[0081] The only difference between this embodiment and embodiment 8 is that in this embodiment, the raw materials of modified mesoporous silica include 34 parts of mesoporous silica, 1.5 parts of epoxy-modified silicone resin and 0.5 parts of titanyl sulfate.

[0082] Example 10

[0083] The only difference between this embodiment and embodiment 8 is that in this embodiment, the raw materials of modified mesoporous silica include 28 parts of mesoporous silica, 6 parts of epoxy-modified silicone resin and 2 parts of titanyl sulfate.

[0084] Embodiment 11

[0085] The only difference between this embodiment and embodiment 8 is that in this embodiment, the raw materials of modified mesoporous silica include 32 parts of mesoporous silica, 3 parts of epoxy-modified silicone resin and 1 part of titanyl sulfate.

[0086] Example 12

[0087] The only difference between this embodiment and embodiment 11 is that in this embodiment, 80 parts of acrylic emulsion are added.

[0088] Embodiment 13

[0089] The only difference between this embodiment and embodiment 11 is that in this embodiment, 54 parts of acrylic emulsion are added.

[0090] Embodiment 14

[0091] The only difference between this embodiment and embodiment 11 is that in this embodiment, 72 parts of acrylic emulsion are added.

[0092] Comparative Example 1

[0093] The only difference between this comparative example and Example 1 is that 10 parts of modified mesoporous silica are replaced by an equal amount of mesoporous silica.

[0094] Comparative Example 2

[0095] The only difference between this comparative example and Example 1 is that no modified mesoporous silica is added.

[0096] Experimental Example 1 Waterproofness and Breathability Test

[0097] ① Waterproof test: The acrylic polymer waterproof and breathable materials prepared in Examples 1 to 6 and Comparative Examples 1 to 2 were used to prepare coating samples according to the method in GB / T 23445-2009 "Polymer Cement Waterproof Coating". After curing, three specimens of 150 mm × 150 mm were cut and the three specimens were tested for impermeability, wherein the test pressure was 0.3 MPa and the pressure was maintained for 30 min;

[0098] ② Air permeability test: The acrylic polymer waterproof and breathable materials prepared in Examples 1 to 6 and Comparative Examples 1 to 2 were tested for water vapor permeability according to the desiccant method in GB / T 17146-2015 "Test method for water vapor permeability of building materials and their products", and the test result was the average value of 5 samples; wherein the test temperature was 25° C. and the relative humidity was 50%.

[0099] The test results are shown in Table 1 below:

[0100] Table 1 Test results

[0101]

[0102] In Table 1, compared with Comparative Examples 1 to 2, the acrylic polymer waterproof breathable material prepared in Example 1 is impermeable, and the water vapor permeability is significantly improved, indicating that the acrylic polymer waterproof breathable material includes modified mesoporous silica, and the mesoporous silica is modified by epoxy-modified silicone resin, which can improve the waterproofness and air permeability of the acrylic polymer waterproof breathable material. In addition, compared with Examples 2 and 4, the water vapor permeability of the acrylic polymer waterproof breathable material prepared in Examples 5 to 6 is improved, indicating that when the weight ratio of mesoporous silica to epoxy-modified silicone resin is 8 to 17:1, the air permeability of the acrylic polymer waterproof breathable material can be further improved.

[0103] Experimental Example 2 Mechanical Properties Test

[0104] The acrylic polymer waterproof and breathable materials prepared in Examples 1 to 14 and Comparative Examples 1 to 2 were tested for tensile strength according to the test method in GB / T 23445-2009 "Polymer cement waterproof coating", and the test results were the average value of 6 samples; wherein the tensile speed was 200 mm / min.

[0105] The test results are shown in Table 2 below:

[0106] Table 2 Test results

[0107]

[0108] In Table 2, compared with Comparative Examples 1-2, the tensile strength of the acrylic polymer waterproof and breathable material prepared in Example 1 is significantly improved, indicating that the acrylic polymer waterproof and breathable material includes modified mesoporous silica, and the mesoporous silica is modified by epoxy-modified silicone resin, which can improve the mechanical properties of the acrylic polymer waterproof and breathable material.

[0109] Compared with Examples 2 and 4, the tensile strength of the acrylic polymer waterproof breathable material prepared in Examples 5 to 6 is improved, indicating that when the weight ratio of mesoporous silica to epoxy-modified silicone resin is 8 to 17:1, the mechanical properties of the acrylic polymer waterproof breathable material can be further improved. Compared with Examples 6 to 7, the tensile strength of the acrylic polymer waterproof breathable material prepared in Examples 8 to 11 is improved, indicating that the mechanical properties of the acrylic polymer waterproof breathable material can be further improved by modifying mesoporous silica with titanyl sulfate and epoxy-modified silicone resin. In addition, compared with Examples 8 to 9, the tensile strength of the acrylic polymer waterproof breathable material prepared in Examples 10 to 11 is improved, indicating that when the weight ratio of mesoporous silica, epoxy-modified silicone resin and titanyl sulfate is 7 to 16:1.5:0.5, the mechanical properties of the acrylic polymer waterproof breathable material can be further improved. Compared with Examples 11 to 12, the tensile strength of the acrylic polymer waterproof and breathable materials prepared in Examples 13 to 14 is improved, indicating that the mechanical properties of the acrylic polymer waterproof and breathable materials can be further improved by using acrylic emulsion and modified mesoporous silica in combination, and when the weight ratio of acrylic emulsion and modified mesoporous silica is 1.5 to 2:1.

[0110] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An acrylic polymer waterproof and breathable material, characterized in that: Comprising component A and component B; The component A comprises the following components in parts by weight: 50-80 parts of acrylic emulsion, 1-2 parts of defoamer, and 1-3 parts of dispersant; The component B comprises the following components in parts by weight: 25-35 parts of cement, 10-40 parts of modified mesoporous silica, and 10-20 parts of quartz powder; The raw materials of the modified mesoporous silica include mesoporous silica and epoxy-modified silicone resin; the weight ratio of the mesoporous silica to the epoxy-modified silicone resin is 1 to 19:1; The raw materials of the modified mesoporous silica also include titanyl sulfate; The preparation method of the modified mesoporous silica comprises the following steps: A1, dissolving the epoxy-modified silicone resin in toluene to obtain an epoxy-modified silicone resin solution; A2. The mesoporous silica and the titanyl sulfate are mixed, calcined, cooled, added into the epoxy-modified silicone resin solution, dispersed evenly, concentrated, and dried to obtain modified mesoporous silica.

2. The acrylic polymer waterproof and breathable material according to claim 1, characterized in that: The weight ratio of the mesoporous silica to the epoxy-modified silicone resin is 8-17:

1.

3. The acrylic polymer waterproof and breathable material according to claim 1, characterized in that: The weight ratio of the mesoporous silica, epoxy-modified silicone resin and titanyl sulfate is 7-16:1.5:0.

5.

4. The acrylic polymer waterproof breathable material according to claim 1, characterized in that: In step A2, during the calcination, the temperature is 500-600° C. and the time is 1-2 hours.

5. The acrylic polymer waterproof and breathable material according to claim 1, characterized in that: The weight ratio of the acrylic emulsion to the modified mesoporous silica is 1.5-2:

1.

6. The acrylic polymer waterproof breathable material according to claim 1, characterized in that: The defoaming agent is one or both of an organosilicon defoaming agent and a mineral oil defoaming agent; the dispersant is one or more of sodium hexametaphosphate, polyvinyl alcohol, and alkylphenol salt.

7. The method for preparing an acrylic polymer waterproof and breathable material according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, mixing the components in the component A uniformly to obtain the component A; S2, mixing the components in the component B uniformly to obtain the component B; S3, mixing the component A and the component B to obtain an acrylic polymer waterproof and breathable material.

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