Environment-friendly bidirectional three-dimensional waterproof moisture-permeable film spreading material and preparation method thereof

Abstract

The invention provides an environment-friendly bidirectional three-dimensional waterproof moisture-permeable film spreading material and a preparation method thereof. The environment-friendly bidirectional three-dimensional waterproof moisture-permeable film spreading material is prepared from the following raw materials: a modified 107 monomer, a nano composite material, an inorganic filler, a defoaming agent, a cross-linking agent, a coupling agent, an accelerant and a diluent. The environment-friendly two-way three-dimensional waterproof moisture-permeable film spreading material is good in overall film-forming property, a layer of continuous, uniform, complete and integrated rubber-like elastomer is formed, and the material has good ductility and good tensile strength; the formed waterproof layer has protruding waterproof capability, anti-pressure capability and high and low temperature resistance, can achieve the effects of moisture prevention, mildew prevention, moss prevention, heat insulation, heat preservation and rust prevention of a coating, can be mechanically sprayed, can also be brushed in a rolling manner and can be coated in a blade manner, and is convenient to construct.

Description

Technical Field

[0001] The invention relates to the field of building waterproof materials, and in particular to an environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material and a preparation method thereof. Background Art

[0002] In today's era of rapid technological development, innovations in the field of materials science continue to drive progress in various industries. As a functional material with special properties, waterproof and breathable membrane spreading materials play an important role in many fields such as clothing, construction, and medical treatment.

[0003] Silicone rubber is a kind of organic silicon polymer material with a unique molecular structure. Its main chain is composed of silicon oxygen bonds (-Si-O-), and the side chains are usually connected to organic groups. This structure gives silicone rubber many excellent properties. Silicone rubber can maintain its elasticity and physical properties in a wide temperature range, and can work normally from extremely cold low temperature to high temperature environment. For example, in the aerospace field, seals made of silicone rubber can ensure the sealing of components in an environment with extreme temperature changes. Silicone rubber can resist the erosion of environmental factors such as ultraviolet rays, ozone, and oxygen, and can still maintain good performance after long-term exposure to outdoor environments. This makes silicone rubber widely used in building exterior wall sealing, solar panel packaging, etc. Silicone rubber has low surface energy and exhibits excellent hydrophobicity, making it difficult for water to wet and penetrate its surface. This property provides a basis for the construction of waterproof and breathable membranes.

[0004] Early waterproof materials focused mainly on preventing water penetration, but often at the expense of breathability. For example, although traditional rubber and plastic coatings have good waterproof properties, they have very poor breathability, resulting in stuffiness and discomfort when worn or used. With the advancement of technology, people began to explore how to achieve moisture permeability while being waterproof. The first waterproof material with a certain degree of moisture permeability is a microporous membrane, which allows water vapor to pass through tiny pores while preventing water droplets from entering. However, the moisture permeability of this material is limited, and the pores are easily blocked by dirt, affecting its long-term performance. Subsequently, hydrophilic non-porous membranes gradually emerged. This type of membrane uses the material's affinity for water molecules to achieve water transfer, which improves the waterproof performance, but the pressure resistance and high and low temperature resistance are poor, and the waterproof performance still needs to be further improved.

[0005] In view of the problems existing in the prior art, how to provide an environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material to solve the problems of poor waterproof ability, pressure resistance and high and low temperature resistance of waterproof materials is an urgent problem to be solved by the present invention. Summary of the invention

[0006] The purpose of the present invention is to provide an environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material and a preparation method thereof, so as to solve the problems of poor waterproof ability, pressure resistance and high and low temperature resistance of the waterproof material proposed in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: On the one hand, the present invention provides an environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material. The raw materials for preparing the environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material include: modified 107 monomer, nano-composite material, inorganic filler, defoaming agent, cross-linking agent, coupling agent, promoter, and diluent.

[0008] Furthermore, the raw materials for preparing the environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material include, by weight: 50-70 parts of modified 107 monomer, 10-20 parts of nano-composite materials, 3-5 parts of inorganic fillers, 2-3 parts of defoaming agents, 3-5 parts of cross-linking agents, 0.05-1 parts of coupling agents, 0.5-2 parts of promoters, and 8-10 parts of diluents.

[0009] Furthermore, the modified 107 monomer is prepared by reacting the 107 monomer and 1-chloro-4-benzyloxybutane, wherein the 107 monomer is α,ω-dihydroxypolydimethylsiloxane; the CAS number of 1-chloro-4-benzyloxybutane is 125340-68-3.

[0010] Further, the preparation of the modified 107 monomer comprises the following steps: S1: weigh 107 monomer and 1-chloro-4-benzyloxybutane for later use; S2: In a three-necked flask equipped with a stirrer, a reflux condenser and a thermometer, add 107 monomers and toluene weighed in step S1; S3: heating the system of step S2 to 60-80° C., and slowly dropping the 1-chloro-4-benzyloxybutane weighed in step S1 under stirring, and after the dropping is complete, adding triethylamine, and continuing to stir for 4-6 hours to obtain a reaction mixture; S4: After the reaction is completed, the reaction mixture is cooled to room temperature, and the reaction mixture is subjected to reduced pressure distillation to obtain a modified 107 monomer.

[0011] Furthermore, the mass ratio of the 107 monomer to 1-chloro-4-benzyloxybutane is 6-8:1.

[0012] Furthermore, the weight average molecular weight of the 107 monomer is 65-75 kDa.

[0013] Furthermore, the nanocomposite material is two or more of nano silicon dioxide, nano titanium dioxide and nano aluminum oxide.

[0014] Furthermore, the inorganic filler is one or more of calcium carbonate, mica powder, and fumed silica.

[0015] On the other hand, the present invention also provides a method for preparing an environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material, comprising the following steps: Step 1: accurately weigh the required modified 107 monomer, nanocomposite material, inorganic filler, defoamer, crosslinking agent, coupling agent, accelerator and diluent for use; Step 2: Place the modified 107 monomer into a reaction kettle, start stirring, then add the nanocomposite material and the inorganic filler in sequence, and stir the reaction at a certain temperature to allow the nanocomposite material and the inorganic filler to be fully dispersed in the modified 107 monomer; Step 3: slowly add the defoamer in step 2, slowly stir to eliminate air, then add the crosslinking agent, coupling agent and accelerator in sequence, continue stirring to fully mix the ingredients; Step 4: adding a diluent, adjusting the viscosity of the system, and finally filtering to obtain an environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material.

[0016] Furthermore, in step 2, the stirring speed is 300-500 rpm, the reaction temperature is 100-120° C., and the reaction time is 1-2 hours; and in step 3, the stirring speed is 100-150 rpm.

[0017] Furthermore, the defoaming agent is Dow Corning AFE-1520.

[0018] Furthermore, the cross-linking agent is glycidyl methacrylate.

[0019] Furthermore, the coupling agent is silane coupling agent KH-560.

[0020] Furthermore, the accelerator is 2-mercaptobenzothiazole.

[0021] Furthermore, the diluent is water.

[0022] 1. The environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material prepared by the present invention breaks through the limitations of traditional materials and has outstanding deep penetration, which can penetrate deep into porous materials and form layers of continuous and solid waterproof barriers. Such a depth effect not only significantly improves the overall waterproof performance of the material, but also adds a solid protection dimension to the waterproof and moisture-proof capabilities of three-dimensional space.

[0023] 2. The environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material prepared by the present invention breaks through the limitations of traditional materials and exhibits excellent self-assembly bridging ability. When it penetrates into the porous material, under the synergistic effect of the additive, the nanocomposite material and the inorganic filler can effectively self-assemble and bridge, significantly shrinking the pore size of the porous material, thereby slowing down the amount and rate of liquid water adsorption in the material. This unique performance enhances the overall protective effect.

[0024] 3. The environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material prepared by the present invention can significantly modify the surface of the base porous material, thereby significantly improving its interaction performance with water. This characteristic greatly increases the contact angle of the material, allowing liquid water to form larger water droplets on the surface and effectively preventing water from further penetrating into the porous structure. This unique modification greatly enhances its three-dimensional waterproof and anti-penetration ability.

[0025] 4. The environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material prepared by the present invention can form a nano-bionic structure similar to the surface of a lotus leaf after a curing process before penetrating into the interior of the porous material. This surface structure has a significant water drop repelling property, making it difficult for liquid water to adhere to or stay on the surface of the material. This characteristic effectively improves the three-dimensional waterproof and moisture penetration resistance of the material.

[0026] Environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material characteristics: emulsion self-leveling, strong penetration, moisture absorption and rapid curing, good overall film-forming properties, forming a continuous, uniform, complete and integrated rubber-like elastic body with good elongation and good peel strength and tensile strength. The waterproof layer formed has excellent air permeability, strong adhesion, tear resistance, high and low temperature resistance (-60-200℃), UV resistance, salt spray resistance, ozone resistance, excellent weather resistance, long service life (≥10 years), no VOC and other harmful substances volatilization, in line with EU environmental protection requirements. It also has the functions of waterproofing and plugging, moisture-proof, mildew-proof and moss-proof, heat insulation, coating rust prevention, and color beautification. It can be sprayed mechanically, rolled and scraped, and is convenient to construct, labor-saving, efficient, and cost-effective.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides an environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material and a preparation method thereof, the environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material has good overall film-forming properties, forming a layer of continuous, uniform, complete and integrated rubber-like elastomer, with good elongation and good tensile strength; the formed waterproof layer has outstanding waterproof ability, pressure resistance and high and low temperature resistance, can play the role of moisture-proof, mildew-proof and moss-proof, heat-insulating and heat-preserving, and anti-rust coating, can be mechanically sprayed, and can also be rolled and scraped, and is easy to construct. DETAILED DESCRIPTION

[0028] The present invention will be described below in conjunction with specific embodiments. It should be noted that the following experimental examples are examples of the present invention and are only used to illustrate the present invention, but not to limit the present invention. Other combinations and various modifications within the concept of the present invention may be performed without departing from the spirit or scope of the present invention.

[0029] Unless otherwise specified, the chemical reagents used in the present invention are all commercially available analytically pure.

[0030] The 107 monomers of different molecular weights in the following experimental examples were purchased from Hubei Xinsihai Chemical Industry Co., Ltd., and the weight average molecular weights provided were 50 kDa, 65 kDa, 75 kDa, and 80 kDa.

[0031] Preparation of modified 107 monomer A: S1: weigh 8 kg of 107 monomer (weight average molecular weight 65 kDa) and 1 kg of 1-chloro-4-benzyloxybutane for later use; S2: In a three-necked flask equipped with a stirrer, a reflux condenser and a thermometer, 107 monomers weighed in step S1 and 4 L of toluene solvent were added; S3: The system of step S2 is heated to 75° C., and the 1-chloro-4-benzyloxybutane weighed in step S1 is slowly added dropwise under stirring. After the addition is complete, 0.2 kg of triethylamine is added, and stirring is continued for 4 hours to obtain a reaction mixture; S4: After the reaction is completed, the reaction mixture is cooled to room temperature, and the reaction mixture is subjected to reduced pressure distillation to obtain modified 107 monomer A.

[0032] Preparation of modified 107 monomer B: The difference between the present preparation and the modified 107 monomer A is that the 8 kg of 107 monomer (weight average molecular weight 65 kDa) weighed in step S1 is replaced with 6 kg of 107 monomer (weight average molecular weight 75 kDa).

[0033] Preparation of modified 107 monomer C: The difference between the present preparation and the modified 107 monomer A is that the 8 kg of 107 monomer (weight average molecular weight 65 kDa) weighed in step S1 is replaced with 10 kg of 107 monomer (weight average molecular weight 65 kDa).

[0034] Preparation of modified 107 monomer D: The difference between the present preparation and the modified 107 monomer A is that the 8 kg of 107 monomer (weight average molecular weight 65 kDa) weighed in step S1 is replaced with 4 kg of 107 monomer (weight average molecular weight 65 kDa).

[0035] Preparation of modified 107 monomer E: The difference between the present preparation and the modified 107 monomer A is that the 8 kg of 107 monomer (weight average molecular weight 65 kDa) weighed in step S1 is replaced with 8 kg of 107 monomer (weight average molecular weight 50 kDa).

[0036] Preparation of modified 107 monomer F: The difference between this preparation and the modified 107 monomer A is that the 8 kg of 107 monomer (weight average molecular weight 65 kDa) weighed in step S1 is replaced by 8 kg of 107 monomer (weight average molecular weight 80 kDa).

[0037] The preparation of the environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material of Examples 1-8 comprises the following steps: Step 1: accurately weigh the required modified 107 monomer, nanocomposite material, inorganic filler, defoamer, crosslinking agent, coupling agent, accelerator and diluent for use; Step 2: Place the modified 107 monomer into a reactor, start stirring at a speed of 400 rpm, then add the nanocomposite material and inorganic filler in sequence, and stir and react at 110° C. for 2 hours to fully disperse the nanocomposite material and inorganic filler in the modified 107 monomer; Step 3: slowly add the defoamer in step 2, slowly stir at a speed of 100 rpm to eliminate air, then add the crosslinking agent, coupling agent and accelerator in sequence, continue stirring to fully mix the ingredients; Step 4: Continue to add diluent in step 3 to adjust the viscosity of the system, and finally filter to obtain an environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material.

[0038] The preparation steps of the environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material of Comparative Example 1 are basically the same as the preparation steps of the environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading materials of Examples 1-8, except that the modified 107 monomer A in step 1 is replaced with 107 monomer (weight average molecular weight is 65kDa).

[0039] The preparation steps of the environment-friendly two-way three-dimensional waterproof and breathable membrane spreading material of Comparative Example 2 are basically the same as those of the environment-friendly two-way three-dimensional waterproof and breathable membrane spreading materials of Examples 1-8, except that: no nanocomposite material is added in step one.

[0040] The preparation steps of the environment-friendly two-way three-dimensional waterproof and breathable membrane spreading material of Comparative Example 3 are basically the same as the preparation steps of the environment-friendly two-way three-dimensional waterproof and breathable membrane spreading materials of Examples 1-8, except that: no inorganic filler is added in step one.

[0041] Embodiment 1~8: The environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material was prepared according to the preparation method. Table 1 is the ingredient list of Examples 1 to 8, calculated by weight.

[0042] Table 1

[0043] Comparative Examples 1 to 3: The materials were prepared according to the above-mentioned method for preparing the environment-friendly two-way three-dimensional waterproof and breathable membrane spreading material. Table 2 is the ingredient list of comparative examples 1 to 3, calculated by weight.

[0044] Table 2

[0045] Performance Test:

[0046] 1. Waterproof ability test: anti-seepage grade test, tested according to GB / T50082-2009 standard.

[0047] 2. Mechanical strength test: According to GB / T50081-2002 "Standard for Test Methods of Mechanical Properties of Concrete", the 28d compressive strength of the above-prepared concrete was tested respectively.

[0048] 3. High and low temperature resistance experiment: The materials obtained from the products of Examples 1-8 and Comparative Examples 1-3 were placed in a 200°C environment for 12 hours, naturally cooled for 12 hours, and then placed in a -40°C environment for 12 hours as a cycle. The cycle was repeated until the material showed obvious color changes, darkening or color spots, and the number of cycles was recorded.

[0049] Table 3: Performance test results

[0050] It can be seen from Table 3 that the environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material of the present invention has good waterproof ability, pressure resistance and high and low temperature resistance. Specifically, it can be seen from the comparison between Experimental Examples 5-6 and Experimental Example 2 that when preparing the modified 107 monomer, the mass ratio of 107 monomer to 1-chloro-4-benzyloxybutane is unreasonable, which will cause the waterproof ability, pressure resistance and high and low temperature resistance of the prepared environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material to deteriorate, and fail to meet the expected requirements; it can be seen from the comparison between Experimental Examples 7-8 and Experimental Example 2 that when preparing the modified 107 monomer, the weight-average molecular weight of 107 monomer is unreasonable, which will cause the waterproof ability, pressure resistance and high and low temperature resistance of the prepared environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material to deteriorate, and fail to meet the expected requirements; it can be seen from the comparison between Comparative Example 1 and Example 2 that when preparing the modified 107 monomer, the weight-average molecular weight of 107 monomer is unreasonable, which will cause the waterproof ability, pressure resistance and high and low temperature resistance of the prepared environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material to deteriorate, and fail to meet the expected requirements; It is known that when unmodified 107 monomer is used, the waterproof ability, pressure resistance and high and low temperature resistance of the prepared environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material will deteriorate, and the expected requirements will not be met; Comparative Example 2 is compared with Example 2, and it can be seen that when no nano-composite filler is added, the pressure resistance and high and low temperature resistance of the prepared environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material will deteriorate, and the expected requirements will not be met; Comparative Example 3 is compared with Example 2, and it can be seen that when no inorganic filler is added, the waterproof ability, pressure resistance and high and low temperature resistance of the prepared environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material will deteriorate, and the expected requirements will not be met.

[0051] The present invention can also be implemented by various other experimental examples. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material, characterized by: The raw materials for preparing the environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material include: modified 107 monomer, nanocomposite material, inorganic filler, defoamer, crosslinking agent, coupling agent, accelerator, and diluent; The modified 107 monomer is prepared by reacting 107 monomer and 1-chloro-4-benzyloxybutane; The 107 monomer is α,ω-dihydroxy polydimethylsiloxane; The mass ratio of the 107 monomer to 1-chloro-4-benzyloxybutane is 6-8:

1.

2. The environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material according to claim 1, characterized in that: The raw materials for preparing the environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material include, by weight: 50-70 parts of modified 107 monomer, 10-20 parts of nanocomposite materials, 3-5 parts of inorganic fillers, 2-3 parts of defoaming agents, 3-5 parts of crosslinking agents, 0.05-1 parts of coupling agents, 0.5-2 parts of accelerators, and 8-10 parts of diluents.

3. The environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material according to claim 1, characterized in that: The preparation of the modified 107 monomer comprises the following steps: S1: weigh 107 monomer and 1-chloro-4-benzyloxybutane for later use; S2: In a three-necked flask equipped with a stirrer, a reflux condenser and a thermometer, add 107 monomers and toluene weighed in step S1; S3: heating the system of step S2 to 60-80° C., and slowly dropping the 1-chloro-4-benzyloxybutane weighed in step S1 under stirring, and after the dropping is complete, adding triethylamine, and continuing to stir for 4-6 hours to obtain a reaction mixture; S4: After the reaction is completed, the reaction mixture is cooled to room temperature, and the reaction mixture is subjected to reduced pressure distillation to obtain a modified 107 monomer.

4. The environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material according to claim 1, characterized in that: The weight average molecular weight of the 107 monomer is 65-75 kDa.

5. The environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material according to claim 1, characterized in that: The nano-composite material is two or more of nano-silicon dioxide, nano-titanium dioxide and nano-aluminum oxide.

6. The environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material according to claim 1, characterized in that: The inorganic filler is one or more of calcium carbonate, mica powder and fumed silica.

7. A method for preparing an environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: accurately weigh the required modified 107 monomer, nanocomposite material, inorganic filler, defoamer, crosslinking agent, coupling agent, accelerator and diluent for use; Step 2: Place the modified 107 monomer into a reaction kettle, start stirring, then add the nanocomposite material and inorganic filler in sequence, and stir and react at a certain temperature; Step 3: slowly add the defoamer in step 2, slowly stir to eliminate air, then add the crosslinking agent, coupling agent and accelerator in sequence, continue stirring to fully mix the ingredients; Step 4: Continue to add diluent to step 3 to adjust the viscosity of the system, and finally filter to obtain an environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material.

8. The method for preparing an environmentally friendly two-way three-dimensional waterproof and breathable membrane spreading material according to claim 7, characterized in that: The stirring speed of step 2 is 300-500 rpm, the reaction temperature is 100-120° C., and the reaction time is 1-2 hours; the stirring speed of step 3 is 100-150 rpm.

Images