Silicone resin adhesives, also known as organic silicone adhesives, are a leader in the field of adhesives, especially in heat-resistant adhesives, which have shown excellent performance.It is mainly composed of polysiloxanes. According to the different sources of raw materials, it can be divided into two categories: silicone resin-based adhesives and silicone rubber-based adhesives.These two types of adhesives have their own characteristics and are widely used in different bonding scenarios.
Silicone resin-based adhesives are mainly used for bonding metal and heat-resistant non-metallic materials.It can maintain stable bonding performance in a wide temperature range of -60℃ to 200℃, which makes it an ideal choice for high temperature environments such as aerospace, electronic appliances, and automobile manufacturing.Silicone resin has good adhesion to metals such as iron, aluminum, tin, and non-metallic materials such as glass and ceramics, but its adhesion to copper is relatively weak.This characteristic makes silicone resin-based adhesives need to consider the matching of materials when choosing bonding objects.
In the preparation process of pure silicone resin-based organic silicone adhesive, inorganic fillers and solvents need to be added to make it.When curing, it releases small molecules of gas, a process that usually requires heating and pressurization.However, the curing temperature of pure silicone resin-based adhesives is higher, which limits its application range to a certain extent.In order to reduce the curing temperature, the researchers successfully reduced the curing temperature to 220~200℃ by adding a small amount of ethyl orthosilicate, potassium acetate, silicate glass and other substances, while maintaining the high strength at high temperatures, the strength value can reach 392-490MPa.
Although the mechanical strength of pure silicone resin is relatively low, its high temperature resistance and mechanical properties can be significantly improved by copolymer modification with organic resins such as polyester, epoxy or phenolic.This modified silicone resin-based adhesive not only has excellent heat resistance, but also has good toughness, impact resistance and chemical resistance, so it is widely used in the manufacture of high temperature resistant structural adhesives.
Silicone resin adhesives occupy an important position in the field of adhesives because of their unique heat resistance and wide applicability.Whether it is the bonding of metal and non-metallic materials, or the structural bonding in a high temperature environment, silicone resin adhesives can provide reliable solutions.With the progress of science and technology and the continuous expansion of applications, the performance of silicone resin adhesives will be further improved and the application fields will be more extensive.
For more information, please click：Silicone resin for domestic electrical appliances - IOTA CORPORATION LTD.
