Silica powder is one of the important raw materials in the production of silicone rubber. The main characteristics of silica powder for silicone rubber:
1. Silica powder is a neutral inorganic filler which is very stable in chemical and physical properties. It does not contain crystal water and does not participate in the curing reaction, and does not affect the reaction mechanism.
2, improve the shape of the powder, increase the specific surface area, increase the contact surface with the adhesive, improve the mechanical strength
3. The filling rate can be increased, the linear expansion coefficient of the cured product and the shrinkage rate during curing can be reduced.
4. It can reduce the heat release during curing and prolong the construction time.
5. The filling amount is increased, the density of the cured product is increased, the hardness is increased, the mechanical strength such as compression resistance, tensile strength and impact resistance is increased and the wear resistance is improved.
6, the increase in filling amount reduces the production cost of the adhesive
1. Overview of silica powder for silicone glue:
Silicone sealant uses ultra-fine silica powder to select a white powder inorganic mineral raw material which is refined by natural quartz ore by pulverization, pickling, grinding, drying and grading. It has high whiteness, high transparency, good dispersion and leveling, low oil absorption and uniform particles. And it has the characteristics of compression resistance, tensile strength, impact resistance, wear resistance, corrosion resistance, chemical and physical properties and stability.
Silicone rubber has strong bonding strength and high tensile strength, and at the same time has weather resistance, vibration resistance, moisture resistance, odor resistance and large changes in cold and heat. In addition to its wide applicability, it can achieve the bonding between most building materials, so the application value is very large. Silicone glass glue can not be used for its own weight, so it can be used for seams of the top or side walls without sagging, slumping or running away. Therefore, the application range of silicone glue is more and more extensive.
First, the application of silicone rubber in the construction industry:
Silicone building sealants play an important role in the materials used in high-rise buildings. It has occupied a solid position, its use is expanding, the number of bottles is increasing, and the amount is increasing. It has become the main variety of major silicone manufacturers. Silicone sealant is a high-grade sealing material with good durability and reliability. It is mainly used for sealing and bonding of cabinet glass slot of window glass. Bonding and sealing of glass curtain wall, glass joint, bathroom Sealing of countertop washrooms, sanitary ware seals, siding, railings, etc., filling seals for roads, bridges, airport concrete pavement expansion joints, etc.
Second, the application of the automotive industry:
Silicone sealing materials are also used in engine systems, exhaust systems, and fuel systems due to their unique heat and cold resistance. It is mainly used for in situ forming. In order to meet the requirements of various sealing parts, various performance products have been developed. Mainly used in engine oil pan and gearbox seal, axle housing joint sealing, engine bonnet seal, car mat screen printing micro-sealing, car headlights and taillights package, windshield seals, etc.
Third, the application in the electronic and electrical industry:
Silicone sealant is also widely used in electronic appliances, and is an indispensable material for household appliances, electronic equipment, and communication equipment. Mainly used for fixing and caulking of various electronic components such as color TV assembly line and printing circuit, bonding and sealing of lighting equipment, joint sealing of cable, potting and coating of electronic components such as high voltage transformer and high voltage thick film resistor. Wait.