Modified asphalt-based weather-resistant waterproof coating and production process thereof

Abstract

This invention relates to the field of waterproof coating technology, and discloses a modified bitumen-based weather-resistant waterproof coating and its production process. This waterproof coating is composed of water, bactericide, diluent, emulsifier, petroleum asphalt, stone powder, aromatics, defoamer, thickener, and film-forming aid. The production process involves sequentially adding and mixing various raw materials in a mixing device. First, a portion of the raw materials is stirred until completely dissolved. Then, the speed of the disperser is adjusted in stages according to different processes, and each subsequently added raw material is continuously stirred. Finally, the film-forming aid is added and stirred until the material is homogeneous before discharging, thus obtaining the modified bitumen-based weather-resistant waterproof coating. The product of this invention can be single-component or applied cold, is simple to operate, and forms a seamless and elastic film after formation. It also possesses good flexibility, crack resistance, adhesion, acid and alkali resistance, and aging resistance. It is suitable for waterproofing needs in various building scenarios, with good waterproofing and seepage prevention effects and a long service life.

Description

Technical Field

[0001] This invention relates to the field of waterproof coating technology, specifically to a modified bitumen-based weather-resistant waterproof coating and its production process. Background Technology

[0002] In the field of building waterproofing, modified bitumen-based waterproof coatings are commonly used waterproofing materials. However, the bitumen-based waterproof coatings currently in use have problems with weather resistance. When faced with various impacts from the natural environment, their function is easily weakened. At the same time, some products are difficult to apply and have poor environmental performance.

[0003] Moreover, the performance of these waterproof materials in terms of elasticity and adhesion is not suitable for waterproofing needs in various scenarios such as roofs and underground buildings. They are prone to technical problems such as flowing, brittleness, and cracking in high and low temperature environments, and cannot meet the higher requirements of projects for waterproof coatings in terms of aging resistance, ease of construction, and waterproof performance. Therefore, the market needs a weather-resistant modified bitumen-based waterproof coating to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a safe and reliable waterproof material with good flexibility, crack resistance, adhesion, acid and alkali resistance, anti-aging properties, and is non-toxic, odorless, and non-flammable.

[0005] The specific technical solution of this invention is as follows:

[0006] A modified bitumen-based weather-resistant waterproof coating is composed of the following raw material components by weight percentage: water 10-15%, bactericide 1-3%, diluent 10-15%, emulsifier 15-20%, petroleum bitumen 20-30%, stone powder 5-10%, aromatic hydrocarbons 8-10%, defoamer 3-5%, thickener 2-5%, and film-forming aid 2-3%.

[0007] A production process for a modified bitumen-based weather-resistant waterproof coating includes the following steps:

[0008] S1. Add water to the mixing equipment and start the mixing. Then add the bactericide and diluent, and continue mixing for 10 minutes until the raw materials are completely dissolved.

[0009] S2. Add emulsifier and petroleum asphalt, adjust the disperser speed to 600 r / min, and stir for 20 minutes;

[0010] S3. Add stone powder, adjust the disperser speed to 800 r / min, and stir for 15 minutes;

[0011] S4. Add defoamer and stir continuously for 15 minutes while adjusting the disperser speed to 800 r / min;

[0012] S5. Add aromatics and stir continuously for 30 minutes while adjusting the disperser speed to 800 r / min;

[0013] S6. Add thickener and stir continuously for 10 minutes while adjusting the disperser speed to 800 r / min;

[0014] S7. Add film-forming aid, and stir until the material is uniform while adjusting the disperser speed to 800 r / min. Then discharge the material to obtain a modified asphalt-based weather-resistant waterproof coating, which is a single component.

[0015] The beneficial effects of this invention are as follows:

[0016] This invention exhibits good weather resistance and is characterized by being non-toxic, odorless, non-flammable, safe, and environmentally friendly. The product can be a single-component product or applied cold-apply, is simple to use, and forms a seamless and elastic film after formation. It also possesses good flexibility, crack resistance, adhesion, acid and alkali resistance, and aging resistance. It is suitable for waterproofing needs in various building scenarios, offering excellent waterproofing and seepage prevention effects and a long service life.

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to specific embodiments. These embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. The scope of protection of the present invention is not limited to the following embodiments.

[0019] Example 1:

[0020] A modified bitumen-based weather-resistant waterproof coating is composed of the following raw material components by weight percentage: water 15%, bactericide 2%, diluent 15%, emulsifier 18%, petroleum bitumen 25%, stone powder 7%, aromatic hydrocarbon 9%, defoamer 4%, thickener 3%, and film-forming aid 2%.

[0021] Its production process includes the following steps:

[0022] S1. Add water to the high-speed dispersion and mixing equipment and start the mixing. Then add the bactericide and diluent, and continue mixing for 10 minutes until the raw materials are completely dissolved.

[0023] S2. Add emulsifier and petroleum asphalt to the above mixture, adjust the speed of the disperser to 600 r / min, and stir for 20 minutes until the material is fully dispersed;

[0024] S3. Add stone powder, adjust the speed of the disperser to 800 r / min, and stir for 15 minutes until the stone powder is evenly mixed with the system;

[0025] S4. Add defoamer and maintain the disperser speed at 800r / min for 15 minutes.

[0026] S5. Add aromatics and maintain the disperser speed at 800 r / min for 30 minutes.

[0027] S6. Add thickener, maintain the speed of the disperser at 800r / min, and continue stirring for 10 minutes until the system consistency is uniform;

[0028] S7. Add film-forming aid, maintain the disperser speed at 800 r / min, and stir until the material is uniform and free of particles before discharging to obtain modified asphalt-based weather-resistant waterproof coating.

[0029] Example 2:

[0030] A modified bitumen-based weather-resistant waterproof coating is composed of the following raw material components by weight percentage: water 10%, bactericide 1%, diluent 15%, emulsifier 20%, petroleum bitumen 30%, stone powder 5%, aromatic hydrocarbon 8%, defoamer 3%, thickener 5%, and film-forming aid 3%.

[0031] The production process is exactly the same as the steps in Example 1, and the modified bitumen-based weather-resistant waterproof coating is prepared using the same process.

[0032] Example 3:

[0033] A modified bitumen-based weather-resistant waterproof coating is composed of the following raw material components by weight percentage: water 10%, bactericide 3%, diluent 15%, emulsifier 15%, petroleum bitumen 25%, stone powder 10%, aromatic hydrocarbon 10%, defoamer 5%, thickener 5%, and film-forming aid 2%.

[0034] The production process is exactly the same as the steps in Example 1, and the modified bitumen-based weather-resistant waterproof coating is prepared using the same process.

[0035] National Standard:

[0036] The modified bitumen-based weather-resistant waterproof coatings prepared in Examples 1-3 above meet the requirements of JC / T864-2023 "Polymer Emulsion Waterproof Coatings for Buildings", namely, they are flexible and crack-free at -15℃, have a performance retention rate of ≥80% after UV and heat aging resistance, can be applied to damp substrates, and have good adhesion stability.

[0037] It also meets the mandatory requirements of GB45671-2025 "Safety Technical Specification for Building Waterproof Coatings" implemented on November 1, 2025, namely, for single-component water-based products, VOC ≤200g / L, formaldehyde ≤50mg / kg, benzene ≤20mg / kg, combustion grade ≥B2, and all environmental and safety indicators are controlled within the national mandatory limits. At the same time, the product has a solid content ≥45%, elongation at break ≥600%, tensile strength ≥0.5MPa, heat resistance up to 130℃ without flow or bubbling, water impermeability up to 0.3MPa for 30 minutes without water seepage, dry substrate adhesion strength ≥0.6MPa, and environmental indicators such as VOC, formaldehyde, and heavy metals all meet the requirements.

[0038] Furthermore, it meets all the mandatory requirements of GB55030-2022 "General Specification for Waterproofing of Building and Municipal Engineering", namely, the minimum thickness of the film after construction on the roof and exterior walls is ≥1.5mm, and the bonding strength after immersion in water is ≥80%. All indicators fully meet the acceptance and use standards for waterproofing projects in building and municipal engineering.

[0039] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A modified bitumen-based weather-resistant waterproof coating, characterized in that, It is composed of the following raw material components by weight percentage: water 10-15%, bactericide 1-3%, diluent 10-15%, emulsifier 15-20%, petroleum asphalt 20-30%, stone powder 5-10%, aromatics 8-10%, defoamer 3-5%, thickener 2-5%, and film-forming aid 2-3%.

2. A production process for a modified bitumen-based weather-resistant waterproof coating as described in any one of claims 1-2, characterized in that, Includes the following steps: S1. Add water to the mixing equipment and start the mixing. Then add the bactericide and diluent, and continue mixing for 10 minutes until the raw materials are completely dissolved. S2. Add emulsifier and petroleum asphalt, adjust the disperser speed to 600 r / min, and stir for 20 minutes; S3. Add stone powder, adjust the disperser speed to 800 r / min, and stir for 15 minutes; S4. Add defoamer and stir continuously for 15 minutes while adjusting the disperser speed to 800 r / min; S5. Add aromatics and stir continuously for 30 minutes while adjusting the disperser speed to 800 r / min; S6. Add thickener and stir continuously for 10 minutes while adjusting the disperser speed to 800 r / min; S7. Add film-forming aid, and stir until the material is uniform while adjusting the disperser speed to 800 r / min. Then discharge the material to obtain modified asphalt-based weather-resistant waterproof coating.