The application of silicone room temperature adhesive in the field of architecture began in the early 1960s. Silicone room temperature adhesive has excellent aging resistance, can be used for more than 50 years under natural conditions, has various colors, can match the colors of various building materials, and makes the building look beautiful, has good adhesion to building materials, and is easy to construct. The remarkable advantages in various applications make silicone room temperature adhesive successful in the construction industry.
Structural response in building construction. Silicone structural adhesive and silicone weatherproof sealant are used for bonding and sealing, which can reliably ensure the structural strength and stiffness of the building curtain wall under loads such as airflow, wind pressure, ice and snow, and self-weight. Silicone structural adhesive is used to firmly and permanently bond the curtain wall to the aluminum frame, and silicone weatherproof sealant is used to fill the expansion joints between curtain wall panels. Silicone structural adhesive for building is an elastomer, which can be stretched or compressed by 20% without being damaged when the building is severely shaken and deformed due to accidental factors such as earthquake, effectively reducing the vibration intensity and frequency of curtain wall. Silicone weatherproof sealant has good water resistance, high and low temperature resistance and aging resistance. Through its flexible connection, the stress concentration is eliminated, and the unbearable joint displacement of mechanical connection is compensated, so that the curtain wall bears the large deformation of 1% in the plane.
Application of sealing in building construction. For example, the joints between panels and interior walls of high-rise buildings, the joints between door and window frames and window panes, the joints between prefabricated panels and marble, the joints between ultra-clean workshops and cold storage, the gap filling around kitchens, and the sealing around shower rooms, bathtubs and urinals. It can also be used to repair cracks in walls and roofs.
Application in energy-saving glass processing of doors and windows. Thermal insulation and sealing technology of energy-saving doors and windows is one of the key energy-saving technologies encouraged by the state, and insulating glass is the representative of energy-saving materials for doors and windows. In the secondary sealing of insulating glass, the comprehensive performance of silicone room temperature adhesive is much better than polyurethane or polysulfide sealant in aging resistance, service life and environmental protection. Therefore, more and more insulating glass secondary sealants use silicone room temperature sealant.
(2) Application in major industrial fields
In the major industrial fields, such as automobile, electric power and electronics, silicone room temperature adhesive is welcoming broad development prospects. Application in automobile and other means of transport manufacturing. Mainly refers to the on-site molding of sealing gaskets and automobile engines, windshields, door and window frames, reflectors, exhaust pipes, lamps and lanterns, instruments, containers, trunk and other equipment susceptible to water shower. Silicone room temperature adhesive has excellent water resistance and lubricating oil resistance, and can be used in water-based systems such as pumps and water tanks, and lubricating oil-based systems such as engines, gear boxes, cam boxes, transformers and hydraulic systems.
Electric power application. Silicone room temperature adhesive has excellent insulation performance and low thermal expansion coefficient. Waterproof property enables the solidified colloid to effectively prevent condensed water from entering; Corrosion resistance can ensure long-term work in acid salt environment; Excellent aging resistance can make its service life as long as 50 years, so it is mainly used for insulation, moisture-proof sealing, environmental protection and corrosion protection, and packaging and bonding of cable accessories.
Applications in electronic and radio industries. Silicone room temperature adhesive is widely used in packaging, pouring, bonding, dipping and coating in this field. Silicone room temperature adhesive is used to package integrated circuits, micro-film components, thick-film components, electronic components or whole machines. The components in the adhesive layer are clearly visible, and the parameters of the components can be accurately detected. Silicone room temperature adhesive is used for bonding, fixing, caulking and sealing. It has good insulation, anti-leakage and impact resistance, and can be used for a long time under harsh conditions. In addition, silicone room temperature adhesive is also used for potting and coating various electronic components such as high-voltage transformers and high-voltage thick-mode resistors.
(3) Application in other industrial fields
Since its appearance, silicone room temperature adhesive has attracted the attention of various industries, not only in traditional architecture and major industrial fields, but also widely used in airport roads and bridges, aerospace, solar energy, medicine and health, food, mechanical processing, toy manufacturing and other fields. Moreover, with the improvement of manufacturing capacity and people's consumption level, the application field of room temperature glue in silica gel will be continuously discovered, and new products and new uses will emerge one after another.
Application of cement slab joints in highways, airports, roads and bridges. On the expressway, the expansion joints set at regular intervals are filled with elastic sealant (to prevent the expansion effect from changing with the seasons) to prevent rainwater and corrosive liquids from infiltrating. In the past, asphalt was generally used as joint filler in expressway, airports, roads and bridges, which was cheap and had a service life of less than one year. In recent years, polysulfide or modified polyurethane adhesives have been widely used. Due to its low aging resistance, its service life is generally two to three years. Although the cost of using silicone room temperature adhesive is slightly higher than the above materials, it has excellent aging resistance, low maintenance cost and long service life, generally more than ten years. It is an ideal material for roads, bridges and airports.
Application in aerospace. Silicone room temperature adhesive is used as sealant and putty in this field, which can withstand the harsh conditions such as alternating cold and hot, ablation and radiation in aerospace. The ablative thermal insulation coating based on silicone room temperature adhesive has low thermal conductivity and convenient construction. It can be used as thermal insulation material for rocket nozzles and recoverable spacecraft, and is also an important material for making spacecraft components.
The application of solar energy. Silicone room temperature adhesive is widely used for sealing components in the solar energy industry because of its ultraviolet aging resistance and high and low temperature aging resistance, which makes solar module maintain good sealing performance for decades.
Application in medicine. Silicone room temperature adhesive has been widely used in medicine because of its excellent comprehensive properties, especially non-toxic, tasteless, physiological inertia and stability to fungicides. Such as plastic and dental impression materials; Filling blood vessels with tumors leads to tumor death; Or used for manufacturing artificial corneas, contact lenses and the like.
Other applications. Silicone room-temperature adhesive can be used as backing paper in the production of foam plastics and artificial leather, and can also be used as backing paper for packaging adhesive materials, self-adhesive trademarks and labels, and pressure-sensitive adhesives. It can also be used as an impression material for artificial leather molding, with fine patterns and good simulation; It can also be used as a soft mold material for copying prototypes such as arts and crafts and ancient cultural relics; It can be used as injection materials for rigid or semi-rigid polyurethane, polyester, polyvinyl chloride, epoxy resin, paraffin, low melting point alloy, gypsum, etc.