Waterproof sealant at joints of prefabricated external wall panels of prefabricated buildings and production process thereof

Abstract

The invention discloses a waterproof sealant at joints of prefabricated external wall panels of prefabricated buildings and a production process of the waterproof sealant. The waterproof sealant comprises an MS polymer, polyether polyol, nano calcium carbonate, polyamide wax, a coupling agent, a catalyst, fumed silica, dibutyltin dilaurate, nano diatomite, an antibacterial agent, a cross-linking agent, a flame retardant, an ultraviolet absorbent, a curing agent, a curing accelerator and absolute ethyl alcohol. The waterproof sealant at the joints of the prefabricated external wall panels of the prefabricated buildings has the advantages of high waterproof performance, good weather resistance, high cohesiveness, short surface drying time, high tensile strength, high elongation at break, high hardness, high corrosion resistance, high falling resistance, long service life, no toxicity, low cost and the like, and is suitable for large-scale popularization and application. The sealant is ahigh-performance waterproof sealant; the sealant has the advantages that the stress is mild, the sealant has stress and elasticity at the same time, and even if the sealant is in a stretched state fora long time, the influence caused by shrinkage of building base materials can be eliminated to the maximum extent under the action of stress relaxation.

Description

Technical field: [0001] The invention relates to the construction field, in particular to a waterproof sealant at the joints of prefabricated exterior wall panels of an assembled building and a production process thereof. Background technique: [0002] Traditional sealants contain solvents that release formaldehyde and volatile organic compounds, which are harmful to people's physical and mental health. Traditional silicone sealant will precipitate silicone oil, making it adhere to pollutants, especially when using porous materials such as stone and concrete, it will cause pollution that is difficult to remove. It is one of the main sources of pollution on the facade of buildings, which greatly reduces the aesthetics and image value of buildings. Silicone adhesives have relatively weak adhesion, while polyurethane adhesives have strong adhesion, but they need to be used with primers. Construction The substrate will shrink over time, resulting in a tendency for the seam to e...

AI Technical Summary

Problems solved by technology

Traditional silicone sealant will precipitate silicone oil, making it adhere to pollutants, especially when using porous materials such as stone and concrete, it will cause difficult-to-remove pollution to the surrounding area

It is one of the main sources of pollution on the facade of buildings, which greatly reduces the aesthetics and image value of buildings. Silicone adhesives have relatively weak adhesion, while polyurethane adhesives have strong adhesion, but they need to be used with primers. Construction The base material will shrink over time, resulting in the tendency of the joint to expand slowly. The bonding surface of ordinary sealant will bear a large mechanical effect, and problems such as sealant cracking and bonding surface damage will occur.

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