With the worldwide support and promotion of prefabricated buildings, the construction industry has gradually entered the industrial age, so what exactly is a prefabricated building? Simply put, prefabricated buildings are like building blocks. The concrete components used in the building are prefabricated in the factory in advance, and then transported to the construction site for hoisting, splicing and assembly to form the building.
What is the relationship between prefabricated buildings and MS sealant?
Because prefabricated buildings are assembled from factory prefabricated components, there are inevitably some assembly gaps between components. Filling these assembly gaps is particularly important. Currently, there are three types of high-performance building sealants on the market: silicone, Polyurethane and polysulfide, MS sealant is different from any of these three sealants. It is a silicone-modified polyether sealant that structurally inherits the characteristics of the terminal silyl structure and the main chain polyether bond structure, which combines the advantages of polyurethane sealant and silicone sealant in terms of performance, is an important direction for the development of new sealants at home and abroad.
So what are the advantages of MS sealant compared with traditional prefabricated building sealants?
1. High elastic recovery rate and strong displacement capacity
Because the joints of concrete slabs will undergo expansion, contraction, deformation and displacement due to temperature changes, concrete shrinkage, slight vibration or settlement of the building, etc., in order to prevent the sealant from cracking and ensure safe and reliable bonding and sealing of the joints, the sealant used must It has a certain degree of elasticity and can freely expand and contract with the opening and closing deformation of the joint to maintain the sealing of the joint. The displacement capacity of the sealant must be greater than the relative displacement of the board seam. It will not tear and be durable during repeated cyclic deformation. Punctured, it can maintain and restore its original performance and shape. After testing, the elastic recovery rate, displacement capacity and tensile modulus of MS sealant all exceeded the national standard requirements, and it has good mechanical properties.
2. Excellent weather resistance
In JCJ1-2014 "Technical Regulations for Prefabricated Concrete Structures", it is clearly stated that the sealing materials selected for building joints shall not only meet the mechanical performance requirements other than shear resistance and expansion and contraction deformation capabilities, but also meet mildew resistance, waterproof, Building physical performance requirements such as weather resistance. If the material is not selected properly, the sealant will crack, fail to achieve the sealing effect, and even the sealant will fail, which will affect the safety of the building. The structure of MS sealant is polyether as the main chain, and it also contains silyl groups with curing functional groups. It gives full play to the advantages of polyurethane sealant and silicone sealant, and greatly improves the weather resistance of the sealant.
3. strong paintability, environmental protection and pollution-free
Because MS glue has the advantages of both polyurethane sealant and silicone sealant, it solves the shortcomings of polysulfide sealant such as slow low-temperature curing speed, easy aging and hardening, lack of durability, and strong pungent odor; at the same time, MS glue does not Like silicone sealants, the adhesive layer is prone to produce oily leachate that contaminates concrete, stone and other decorative materials. It has good paintability and environmental protection, which further promotes the development and progress of prefabricated building sealants.
In general, prefabricated buildings are the development trend of construction models. In the entire prefabricated building system, the choice of sealant will be one of the key joints that affect the safety of the entire prefabricated building. Silicone modified polyether sealant sealant——MS sealant has excellent comprehensive performance and will be your best choice.
SIWAY is committed to providing customers with stable and reliable high-quality raw materials and customized technical services. SIWAY's silane modification technology continues to provide professional solutions for prefabricated building sealing and bonding. We look forward to working with you. Together, we will help the vigorous development of prefabricated buildings in the world .
Post time: Sep-01-2023