Weather-resistant, aging-resistant and high-elasticity organosilicon waterproof heat-insulating coating and preparation method thereof

Abstract

The invention discloses an exposed organic silicon waterproof heat-insulating coating for a concrete roof with excellent weather resistance, aging resistance and high elasticity and a preparation method thereof. According to the technical scheme, the organic silicon waterproof heat-insulating coating comprises the following raw materials in percentage by weight: 0-50% of hydroxyl-terminated polydimethyldiethylsiloxane with the viscosity of 5000-80000 centistokes; 0%-50% of hydroxyl-terminated polydimethylsiloxane with the viscosity of 5000 centistokes to 80000 centistokes; 0 to 20% of trimethyl-terminated methyl ethyl silicone oil with the viscosity of 100 to 1000 centistokes; 0 to 20% of trimethyl-terminated methyl silicone oil with the viscosity of 100 to 1000 centistokes; 10-20% of a reinforcing filler; 10-40% of a reflective thermal insulation filler; 3-8% of a cross-linking agent; and 0.01-0.1% of a catalyst. The organic silicon waterproof heat insulation coating can be exposed to the sun for use for a long time without aging, can resist high temperature of 150 DEG C or below and low temperature of-60 DEG C or above, has elastic elongation at room temperature of 800% or above, elastic elongation at-60 DEG C of 600% or above, and reflected sunlight energy of 80% or above, can be used as a roof exposed waterproof material, and can be used as a roof waterproof material. The number of waterproof layers, heat insulation layers and sealing layers can be reduced.

Description

Technical Field

[0001] This application relates to the technical field of coatings, and specifically relates to an organosilicon waterproof and heat-insulating coating with excellent weather resistance, aging resistance, and high elasticity, as well as a preparation method thereof. Background Art

[0002] In recent years, the newly promulgated building waterproofing technical specifications have clearly increased the warranty period of concrete roof waterproofing projects to twenty years. This mandatory clause poses dual technical challenges to the durability indicators of waterproofing materials: on the one hand, the materials are required to have more excellent weather resistance to withstand the test of photo-oxidative aging, and on the other hand, they need to maintain structural stability under extreme temperature differences from -60°C to 100°C. It is worth noting that against the backdrop of global warming, the frequent occurrence of extreme high-temperature weather and the extension of regional sweltering heat cycles are driving the development of building envelope systems towards ultra-low heat transfer coefficients, which puts forward more stringent technical standards for the innovation of the roof insulation system.

[0003] Currently, the following two types of material systems are mainly used in roof waterproofing projects: one is the waterproof coating system mainly based on polyurethane (including polyurethane waterproof coatings and polyurethane asphalt composite coatings) and polymer cement-based; the other is the roll material system represented by synthetic polymer rolls and SBS waterproof rolls based on rubber-modified asphalt. It is worth noting that the above materials generally have technical bottlenecks of insufficient thermal stability and poor anti-ultraviolet aging performance during long-term service, and problems such as material embrittlement and bond failure are likely to occur, directly affecting the durability of the waterproof system.

[0004] Although in current engineering practices, a multiple protection system can be constructed by setting 2 - 3 overlapping waterproof layers, or an insulation layer and a closed protection layer can be added above the waterproof structure layer to meet the dual requirements of the new "Building Waterproofing Technical Specification" for waterproof life and energy-saving indicators. However, this traditional solution has multiple limitations: First, the multi-layer structure system significantly increases the material consumption and construction cost. After calculation, the comprehensive cost increases by about 35% - 45%; second, the superimposed structure increases the roof load by 20% - 30%, posing higher requirements for structural safety; in addition, when the material undergoes thermal aging failure, the multi-layer interface effect will form complex seepage paths, making it difficult to locate leakage points, and the maintenance cost is 2 - 3 times higher than that of the single-layer system. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides an organosilicon waterproof and heat-insulating coating for exposed concrete roofs with excellent weather resistance, aging resistance, and high elasticity, and the technical solutions adopted include:

[0006] The raw materials of the organosilicon waterproof and heat-insulating coating include, by weight percentage:

[0007]

[0008] One embodiment of the present invention solves the technical problem by adopting the following technical solution: The raw materials of the terminal hydroxyl polydimethyldiethylsiloxane with a viscosity of 5000 to 80000 centistokes include, by weight percentage:

[0009]

[0010] One embodiment of the present invention solves the technical problem by adopting the following technical solution: The preparation method of the terminal hydroxyl polymethylethylsiloxane with a viscosity of 5000 to 80000 centistokes includes:

[0011] S1. Weigh the raw materials according to the formula;

[0012] S2. Put 2,2,4,4,6,6 - hexaethylcyclotrisiloxane, cyclic dimethylsiloxane mixture, water and an alkali catalyst into a polymerization kettle for ring - opening polymerization reaction to obtain a high - molecular polysiloxane;

[0013] S3. Add water into the polymerization kettle, carry out hydrolysis rearrangement reaction at 150 - 170 °C, degrade to generate a polymer with a viscosity of 5000 to 80000 centistokes, carry out neutralization, dehydration and removal of low - boilers, and then cool to room temperature to obtain the terminal hydroxyl polydimethyldiethylsiloxane with a viscosity of 5000 to 80000 centistokes.

[0014] One embodiment of the present invention solves the technical problem by adopting the following technical solution: The raw materials of the trimethyl - terminated polydimethyldiethylsiloxane (methylethyl silicone oil) with a viscosity of 100 to 1000 centistokes include, by weight percentage:

[0015] 2,2,4,4,6,6 - hexaethylcyclotrisiloxane 10 - 89.9%

[0016] Cyclic dimethylsiloxane 10 - 90%

[0017] Hexamethyldisiloxane 0.1 - 1%.

[0018] One embodiment of the present invention solves the technical problem by adopting the following technical solution: The preparation method of the trimethyl - terminated methylethylsiloxane (methylethyl silicone oil) with a viscosity of 100 to 1000 centistokes includes:

[0019] S1. Weigh the raw materials according to the formula;

[0020] S2. Mix 2,2,4,4,6,6 - hexaethylcyclotrisiloxane, cyclic dimethylsiloxane and hexamethyldisiloxane evenly, and pump them into a vertical reaction tower containing perfluorosulfonic acid type cation exchange resin and cation exchange resin from the lower part under normal temperature and pressure for ring - opening polymerization reaction. The residence time is 1 h. After removing low - boilers from the mixed product flowing out of the top of the vertical reaction tower and cooling it to room temperature, polydimethyldiethylsiloxane with trimethyl end - groups and a viscosity of 100 - 1000 centistokes is obtained.

[0021] This application also discloses a preparation method of a weather - resistant, aging - resistant and highly elastic silicone waterproof and heat - insulating coating, including:

[0022] S1. Weigh raw materials according to the formula;

[0023] S2. Mix hydroxy - terminated polydimethyldiethylsiloxane with different viscosities, hydroxy - terminated polydimethylsiloxane, trimethyl - terminated dimethyldiethylsilicone oil, trimethyl - terminated dimethylsilicone oil, either alone or respectively with various fillers and reinforcing agents in proportion, and then conduct high - temperature vacuum kneading. The temperature during kneading is 130 - 150 °C, the vacuum degree is above 0.95, and the time is 4 - 6 h to remove small molecules and moisture in the mixture;

[0024] S3. Put the kneaded material into a planetary stirring kettle, cool it to room temperature, lower the lid of the planetary stirring kettle, close it tightly, and degas under vacuum with a vacuum degree above 0.95 under planetary stirring;

[0025] S4. Add a cross - linker and a catalyst to the degassed kneaded material, stir evenly, and degas under vacuum with a vacuum degree above 0.95;

[0026] S5. After releasing the gas, raise the lid of the planetary mixer, pull out the stirring kettle, discharge the material with a pressing machine, and obtain a weather - resistant, aging - resistant and highly elastic silicone waterproof and heat - insulating coating by sealed packaging.

[0027] In the above step 2, the specific method of high - temperature vacuum kneading of hydroxy - terminated polydimethyldiethylsiloxane with different viscosities, hydroxy - terminated polydimethylsiloxane, trimethyl - terminated dimethyldiethylsilicone oil, trimethyl - terminated dimethylsilicone oil, either alone or respectively with various fillers and reinforcing agents in proportion is as follows: Mix hydroxy - terminated polydimethyldiethylsiloxane with different viscosities, hydroxy - terminated polydimethylsiloxane, trimethyl - terminated dimethyldiethylsilicone oil, trimethyl - terminated dimethylsilicone oil, conduct high - temperature vacuum kneading, and then mix with fillers and reinforcing agents; or mix with fillers and reinforcing agents in proportion according to the formula respectively, conduct high - temperature vacuum kneading, and then mix the kneaded materials.

[0028] The beneficial effects of the present invention:

[0029] Silicone materials have the characteristics of aging resistance, high elasticity, and resistance to high and low temperatures. The silicone waterproof and heat-insulating coating prepared in the present invention can be used for a long time under sunlight exposure without aging, can withstand high temperatures below 150°C and low temperatures above -60°C, the room temperature elastic elongation rate can reach more than 800%, and the elastic elongation rate at -60°C can still reach more than 600%. It is suitable for use as an exposed roof waterproof material;

[0030] The exposed silicone waterproof and heat-insulating coating is not only aging-resistant, resistant to high and low temperatures but also reflects heat insulation. It can reduce the number of waterproof layers, heat-insulating layers, and closed layers in the design, reduce the construction cost and maintenance cost, and reduce the floor load;

[0031] The silicone waterproof and heat-insulating coating prepared from hydroxy-terminated polydimethyldiethoxysiloxane and trimethyl-terminated polydimethyldiethoxysiloxane (methyl ethyl silicone oil) also has the performance of withstanding -70°C, which can meet the requirements of extreme low-temperature weather on waterproof materials on the earth;

[0032] Due to the characteristics of micron-sized titanium dioxide and nano-titanium dioxide in reflecting solar energy, the silicone waterproof and heat-insulating coating prepared in the present invention also has the function of reflecting heat insulation as an exposed waterproof and heat-insulating coating. It can reflect more than 80% of the solar energy into the air, thereby achieving the effect of reducing the roof temperature and environmental protection and energy conservation; Specific Embodiments

[0033] The terms used in the present invention generally have the meanings commonly understood by those of ordinary skill in the art unless otherwise specified.

[0034] The present invention will be further described in detail below with reference to specific examples and data. It should be understood that this example is only for illustrating the present invention and does not limit the scope of the present invention in any way.

[0035] In the following examples, various processes and methods not described in detail are conventional methods well known in the art. The materials, reagents, devices, instruments, equipment, etc. used in the following examples can be obtained from commercial sources unless otherwise specified.

[0036] Based on the weather-resistant, aging-resistant, and highly elastic silicone waterproof and heat-insulating coating and its preparation method proposed in this application, the embodiments of this application are as follows:

[0037] The raw materials of the hydroxy-terminated polydimethyldiethoxysiloxane with a viscosity of 5000 - 80000 centistokes in this embodiment include by weight percentage:

[0038]

[0039] Cyclic dimethylsiloxane, also known as DMC, is a mixture of cyclic siloxanes such as D3, D4, and D5. The base catalyst is potassium siloxanol or tetramethylammonium siloxane.

[0040] Examples 1 - 3 of the present application prepare hydroxy-terminated polydimethyldiethylsiloxane with a viscosity of 5000 - 80000 centistokes. The raw material compositions of the hydroxy-terminated polydimethyldiethylsiloxane in Examples 1 - 3 are shown in Table 1. The preparation methods of Examples 1 - 3 include:

[0041] S1. Weigh the raw materials according to the formula.

[0042] S2. Put 2,2,4,4,6,6 - hexaethylcyclotrisiloxane, cyclic dimethylsiloxane, water, and the base catalyst into a polymerization kettle for ring - opening polymerization reaction to obtain high - molecular polysiloxane.

[0043] S3. Add water to the polymerization kettle and carry out hydrolysis rearrangement reaction at 150 - 170 °C to degrade and generate a polymer with a viscosity of 5000 - 80000 centistokes.

[0044] S4. Put the hydroxy - terminated polydimethylethylsiloxane with a viscosity of 5000 - 80000 centistokes into a neutralization kettle, add a neutralizing agent (such as white carbon black or phosphoric acid - polysiloxane solution), and process until the material is neutral.

[0045] S5. Blow dry nitrogen through an inlet tube and connect to a vacuum system to remove low - molecular cyclic siloxanes and other volatile components in the product.

[0046] S6. After removing the volatile components, put the product into a cooling kettle, cool it to room temperature, and discharge to obtain hydroxy - terminated polydimethyldiethylsiloxane with a viscosity of 5000 - 80000.

[0047] Table 1

[0048]

[0049] In this example, the raw materials of trimethyl - terminated polydimethylethylsiloxane with a viscosity of 100 - 1000 centistokes include, by weight percentage:

[0050] 2,2,4,4,6,6 - hexaethylcyclotrisiloxane 10 - 89.9%

[0051] Cyclic dimethylsiloxane 10 - 90%

[0052] Hexamethyldisiloxane 0.1 - 1.0%

[0053] Examples 4 - 6 of the present application prepare trimethyl - terminated polydimethyldiethylsiloxane (methyl - ethyl silicone oil) with a viscosity of 100 - 1000 centistokes. The raw material compositions of the trimethyl - terminated polydimethyldiethylsiloxane (methyl - ethyl silicone oil) in Examples 4 - 6 are shown in Table 2. The preparation methods of Examples 4 - 6 include:

[0054] S1. Weigh the raw materials according to the formula;

[0055] S2. Mix 2,2,4,4,6,6 - hexaethylcyclotrisiloxane, cyclic dimethylsiloxane, and hexamethyldisiloxane evenly, and pump them into a vertical reaction tower containing perfluorosulfonic acid - type cation exchange resin and cation exchange resin from the lower part under normal temperature and pressure for ring - opening polymerization reaction. The residence time is 1 h, and the mixed product flowing out from the top of the vertical reaction tower is sent to an intermediate tank;

[0056] The catalytic speed of perfluorosulfonic acid - type cation exchange resin is thirty times that of ordinary cation exchange resin, but the cost is expensive. By using perfluorosulfonic acid - type cation exchange resin and cation exchange resin in combination, the reaction speed is increased and the catalyst cost is controlled. The hexamethyldisiloxane is a kind of chain - terminating agent or end - capping agent. The viscosity or molecular weight of trimethyl - terminated methyl - ethyl silicone oil is related to the dosage of the chain - terminating agent hexamethyldisiloxane. The larger the dosage of hexamethyldisiloxane, the smaller the viscosity or molecular weight.

[0057] S3. Pump the mixed product in the intermediate tank into a low - boiling - point substance removal tower, and remove the low - boiling - point substances in a vacuum environment of 220 °C and a vacuum degree higher than 0.95, and then put the tower bottom product of the low - boiling - point substance removal tower into a cooling tank;

[0058] S4. Cool the tower bottom product in the cooling pipe until it cools to room temperature, and then discharge to obtain trimethyl - terminated polydimethyldiethylsiloxane (methyl - ethyl silicone oil) with a viscosity of 100 - 1000 centistokes.

[0059] Table 2

[0060] Component Example 4 Example 5 Example 6 2,2,4,4,6,6-Hexaethylcyclotrisiloxane 20 50 80 Cyclodimethylsiloxane (DMC) 80 50 20 Hexamethyldisiloxane 0.1 0.5 1.0

[0061] Based on the hydroxy - terminated polydimethyldiethylsiloxane with a viscosity of 5000 - 80000 centistokes prepared in Examples 1 - 3 and the trimethyl - terminated polydimethyldiethylsiloxane (methyl - ethyl silicone oil) with a viscosity of 100 - 1000 centistokes prepared in Examples 4 - 6, Examples 7 - 12 of the present application are now proposed;

[0062] Examples 7 - 9 and Examples 10 - 12 of the present application are provided. Examples 7 - 9 are low - viscosity, easy - to - apply one - component condensation - type room - temperature moisture - cured silicone waterproof and heat - insulating coatings, and Examples 10 - 12 are high - viscosity thixotropic one - component condensation - type room - temperature moisture - cured silicone waterproof and heat - insulating coatings. The weight percentage of the diethylsiloxane linkages in the hydroxy - terminated polydimethyldiethylsiloxane and trimethyl - terminated methylethylsilicone oil involved is 50% in both cases.

[0063] The specific composition of each component of the raw materials of the low - viscosity, easy - to - apply one - component condensation - type room - temperature moisture - cured silicone waterproof and heat - insulating coatings in Examples 7 - 9 is shown in Table 3:

[0064] Table 3

[0065]

[0066]

[0067] The preparation method of the low - viscosity, easy - to - apply one - component condensation - type room - temperature moisture - cured silicone waterproof and heat - insulating coatings in Examples 7 - 9 includes:

[0068] Step 1: Weigh the raw materials according to the formula.

[0069] Step 2: Knead the hydroxy - terminated polydimethyldiethylsiloxane with different viscosities, hydroxy - terminated polydimethylsiloxane, and trimethyl - terminated methylethylsilicone oil with different viscosities, dimethyl - terminated dimethylsilicone oil alone or in proportion with various fillers and reinforcing agents by high - temperature vacuum kneading. The temperature during kneading is 130 - 150 °C, the vacuum degree is above 0.95, and the time is 4 - 6 h to remove small molecules and moisture in the mixture.

[0070] Step 3: Place the kneaded material in a planetary stirring kettle, cool it to room temperature, lower the lid of the planetary stirring kettle, close it tightly, and evacuate to below 666 Pa under planetary stirring for degassing.

[0071] Step 4: Add a cross - linker and a catalyst to the degassed kneaded material, stir evenly, and evacuate to below 666 Pa for degassing.

[0072] Step 5: After releasing the gas, raise the lid of the planetary mixer, pull out the stirring kettle, discharge the material with a pressing machine, and seal and package to obtain the low - viscosity, easy - to - apply one - component condensation - type room - temperature moisture - cured silicone waterproof and heat - insulating coating.

[0073] The specific composition of each component of the raw materials of the high - viscosity thixotropic one - component condensation - type room - temperature moisture - cured silicone waterproof and heat - insulating coatings in Examples 10 - 12 is shown in Table 4:

[0074] Table 4

[0075]

[0076]

[0077] Preparation method of high-viscosity thixotropic one-component condensation type room-temperature moisture-curing silicone waterproof and heat-insulating coating:

[0078] Step 1: Weigh raw materials according to the formula

[0079] Step 2: High-temperature vacuum kneading is carried out on terminal hydroxyl polydimethyldiethylsiloxane, terminal hydroxyl polydimethylsiloxane, trimethyl-terminated dimethyldiethylsilicone oil, and trimethyl-terminated dimethylsilicone oil with different viscosities alone or in proportion with various fillers and reinforcing agents. The temperature during kneading is 130-150°C, the vacuum degree is above 0.95, and the time is 4-6h to remove small molecules and moisture in the mixture.

[0080] Step 3: Place the kneaded material in a planetary stirring kettle, cool it to room temperature, lower the lid of the planetary stirring kettle, close it tightly, and evacuate to a vacuum degree above 0.95 under planetary stirring for degassing.

[0081] Step 4: Add a cross-linking agent and a catalyst to the degassed kneaded material, stir evenly, and evacuate to a vacuum degree above 0.95 for degassing.

[0082] Step 5: After deflation, raise the lid of the planetary stirrer, pull out the stirring kettle, discharge the material with a pressing machine, and seal and package to obtain a high-viscosity thixotropic one-component condensation type room-temperature moisture-curing silicone waterproof and heat-insulating coating.

[0083] The silicone waterproof and heat-insulating coating prepared in Examples 7-9 has the characteristics of low viscosity, easy coating construction, aging resistance, high and low temperature resistance, an elastic elongation rate of up to more than 800% at room temperature, and a solar energy reflectivity of up to more than 80%, and is suitable for large-area exposed use on the roof.

[0084] The high-viscosity thixotropic one-component condensation type room-temperature moisture-curing silicone waterproof and heat-insulating coating prepared in Examples 10-12 has the characteristics of high viscosity, good thixotropy, non-sagging, aging resistance, high and low temperature resistance, an elastic elongation rate of up to more than 800% at room temperature, and a solar energy reflectivity of up to more than 80%, and is suitable for vertical surface exposed use on parts such as roof parapets.

[0085] Certainly, the present invention is not limited to the above embodiments. Those skilled in the art can make equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations and substitutions are all included in the scope defined by the claims of this application.

Claims

1. Weather-resistant, aging-resistant, highly elastic silicone waterproof and heat-insulating coating, characterized in that: The raw materials include by weight percentage:

2. The weather-resistant, aging-resistant, highly elastic organic silicon waterproof and heat-insulating coating according to claim 1, characterized in that: The reflective heat-insulating filler comprises micron-grade titanium dioxide and nano titanium dioxide.

3. The weather-resistant, aging-resistant, highly elastic organic silicon waterproof and heat-insulating coating according to claim 1, characterized in that: The filler includes one, two or more of a reinforcing filler, a thermal conductive filler and a flame retardant filler.

4. The weather-resistant, aging-resistant, highly elastic organic silicon waterproof and heat-insulating coating according to claim 3, characterized in that: The reinforcing filler includes one, two or more of heavy calcium carbonate, light calcium carbonate, nano calcium carbonate, white carbon black and fumed silica.

5. The weather-resistant, aging-resistant, highly elastic organic silicon waterproof and heat-insulating coating according to claim 1, characterized in that: The raw materials of the terminal hydroxyl polydimethyl diethyl siloxane with a viscosity of 5000 to 80000 centistokes include, by weight percentage:

6. The weather-resistant, aging-resistant, highly elastic organic silicon waterproof and heat-insulating coating according to claim 5, characterized in that: The preparation method of terminal hydroxyl polymethylethylsiloxane with a viscosity of 5000 to 80000 centistokes comprises: S1. Weigh the raw materials according to the formula; S2, adding 2,2,4,4,6,6-hexaethylcyclotrisiloxane, a mixture of cyclodimethylsiloxane, water and an alkali catalyst into a polymerization kettle to carry out a ring-opening polymerization reaction to obtain a high molecular weight polysiloxane; S3. Add water into the polymerization kettle, carry out hydrolysis and rearrangement reaction at 150-170° C., degrade to generate a polymer with a viscosity of 5000-80000 centistokes, neutralize, dehydrate and decompose, and cool to room temperature to obtain a hydroxy-terminated polydimethyldiethylsiloxane with a viscosity of 5000-80000 centistokes.

7. The weather-resistant, aging-resistant, highly elastic organic silicon waterproof and heat-insulating coating according to claim 1, characterized in that: The raw materials of trimethyl end-capped polydimethyl diethyl siloxane with a viscosity of 100 to 1000 centistokes include, by weight percentage: 2,2,4,4,6,6-hexaethylcyclotrisiloxane 10~89.9% Cyclodimethicone 10~90% Hexamethyldisiloxane 0.1~1%.

8. The weather-resistant, aging-resistant, highly elastic organic silicon waterproof and heat-insulating coating according to claim 7, characterized in that: The preparation method of trimethyl terminated methylethyl siloxane with a viscosity of 100 to 1000 centistokes comprises: S1. Weigh the raw materials according to the formula; S2. Evenly mix 2,2,4,4,6,6-hexaethylcyclotrisiloxane, cyclodimethylsiloxane and hexamethyldisiloxane, and pump them into a vertical reaction tower containing perfluorosulfonic acid type cation exchange resin and cation exchange resin at room temperature and pressure to carry out ring-opening polymerization reaction with a residence time of 1 hour. Degassing the mixed product flowing out of the top of the vertical reaction tower and cooling it to room temperature to obtain trimethyl-terminated polydimethyldiethylsiloxane with a viscosity of 100 to 1000 centistokes.

9. A method for preparing a weather-resistant, aging-resistant, highly elastic organic silicon waterproof and heat-insulating coating as claimed in any one of claims 1 to 8, characterized in that: include: S1. Weigh the raw materials according to the formula; S2. Mix terminal hydroxyl polydimethyl diethyl siloxane, terminal hydroxyl polydimethyl siloxane, trimethyl-terminated dimethyl diethyl siloxane, and trimethyl-terminated dimethyl siloxane with different viscosities or mix them with various fillers and reinforcing agents in proportion, and then knead them under high temperature vacuum. The kneading temperature is 130-150° C., the vacuum degree is above 0.95, and the time is 4-6 hours to remove small molecules and moisture in the mixture; S3, put the kneaded material into a planetary stirring kettle, cool it to room temperature, lower the lid of the planetary stirring kettle, close it tightly, and evacuate it to a vacuum degree of 0.95 or above under planetary stirring for degassing; S4. Add the crosslinking agent and catalyst to the degassed kneaded material, stir evenly, and evacuate to a vacuum degree of more than 0.95 for degassing; S5. After venting, raise the planetary mixer cover, pull out the mixing kettle, use a press to discharge the material, and seal and package to obtain the weather-resistant, aging-resistant, and highly elastic organic silicone waterproof and heat-insulating coating.

Images