Silicone rubber has been widely used, but there may be some people who do not understand and call it not fixed on the understanding and distinction between silicone rubber and silicone rubber. Today Xiaobian introduces the difference and classification of silica gel and silicone rubber in detail here. At present, the concept of "silica gel" is not standardized, because up to now, there is no national explicit term. When we hear the word "silica gel", we must understand whether it is silica or silicone containing synthetic rubber, or in the final analysis whether it is inorganic silica or organic silica gel.
“硅胶”叫法有几个相关的词：硅橡胶，矽胶，矽利康。硅橡胶和硅胶的关系，硅胶区别而又包含硅橡胶，硅橡胶是“硅胶” 里面的有机“硅胶”。“矽胶”是港台的说法，在中国大陆叫“硅胶”，矽胶和矽利康是英文silicone的音译， 我们通常说它也就是指“硅胶”。
"Silica gel" has several related words: silicone rubber, silicone rubber, silicon Likang. The relationship between silicone rubber and silica gel. Silica gel is different but contains silicone rubber. Silicone rubber is the organic "silica gel" in "silica gel". "Silica gel" is a Hong Kong and Taiwan term. It's called "silica gel" in mainland China. Silica gel and silicone are transliteration of silicone in English. We usually call it "silica gel".
Application of silica gel in medical treatment
In conclusion, silica gel can be divided into organic silica gel and inorganic silica gel according to its properties and components.
Let's talk about silicone rubber.
I. performance and technical parameters of silicone rubber
Silicone rubber is one of the largest and most widely used silicone products. After vulcanization, silicone rubber has excellent characteristics of high and low temperature resistance, weather resistance, hydrophobicity, electrical insulation, physiological inertia and so on.
Main properties and application of silicone rubber products: according to its curing temperature, silicone rubber can be divided into high temperature (heating) curing type and room temperature curing type. High temperature rubber is mainly used for manufacturing various silicone rubber products, while room temperature rubber is mainly used as adhesive, potting material or mold.
Hot vulcanized silicone rubber (HTV)
热硫化硅橡胶（HTV）是有机硅产品中最重要的一类，甲基乙烯基硅橡胶（VMQ）是HTV中主要的品种，俗称高温胶。 甲基乙烯基硅橡胶（生胶）是无色、无臭、无毒、无机械杂质的胶状物，生胶按需要加入适当的补强剂、结构控制剂、硫化剂等助剂一起混炼，然后升温模压成型或挤出成型，再经二段硫化做成各种制品。其制品具有优良的电缘性，抗电弧、电晕、电火花能力强，防水、防潮、抗冲击力、抗震性好，具有生理惰性，透气性等性能。 主要用于航空、仪表、电子电器、航海、冶金、机械、汽车、医疗卫生等部门，可做各种形状的密封圈、垫片、管、电缆，也可做人体器官、血管、透气膜以及橡胶模具，精密铸造的脱模剂等。
Hot vulcanized silicone rubber (HTV) is the most important type of silicone products, and methyl vinyl silicone rubber (VMQ) is the most important type of HTV, commonly known as high temperature rubber. Methyl vinyl silicone rubber (raw rubber) is a colourless, odorless, nontoxic, and mechanical impurity free rubber. Raw rubber is mixed with appropriate reinforcing agent, structural control agent, curing agent and other additives as required, and then heated, molded or extruded, and then made into various products through secondary vulcanization. Its products have excellent electrical insulation, arc resistance, corona, spark resistance, water-proof, moisture-proof, impact resistance, earthquake resistance, physiological inertia, air permeability and other properties. It is mainly used in aviation, instrument, electronic and electrical equipment, navigation, metallurgy, machinery, automobile, medical and health departments. It can be used as sealing ring, gasket, pipe, cable of various shapes, as well as human organ, blood vessel, ventilating film, rubber mold, mold release agent of precision casting, etc.
Room temperature vulcanized silicone rubber (RTV)
Room temperature vulcanized silicone rubber generally includes condensation type and addition type. The addition molding room temperature adhesive is based on the linear polysiloxane with vinyl group and the hydrosiloxane as the cross-linking agent. In the presence of catalyst, the cross-linking reaction takes place from room temperature to medium temperature and becomes the elastomer. It has good heat resistance, hydrophobicity and electrical insulation. At the same time, it has excellent physical and mechanical properties, especially in tensile strength, relative elongation and tear strength. It is suitable for many kinds of vulcanization methods, such as radiation vulcanization, peroxide vulcanization and addition molding vulcanization. It is widely used in heat-resistant, moisture-proof, electrical insulation, high-strength silicone rubber products, etc.
Condensation room temperature vulcanized silicone rubber is characterized by the condensation reaction between silicon hydroxyl and other active substances. It can be crosslinked into elastomer at room temperature. The products can be divided into two forms: single component packaging and two-component packaging. RTV-1 is one of the main products of condensed liquid silicone rubber. It is usually made up of basic polymer, cross-linking agent, catalyst, filler and additive. The product is packed in a sealed hose, extruded during use, and can be self vulcanized into an elastomer after contacting with air, which is extremely convenient for use. Vulcanizate can be used for a long time in the temperature range of (- 60 ~ + 200 ℃), with excellent electrical insulation performance and chemical stability, water resistance, ozone resistance, weather aging resistance, and good adhesion to a variety of metal and non-metal materials. It is mainly used for coating of various electronic components and electrical equipment, and the sealing material plays the role of insulation, moisture-proof and shockproof; it is used as the surface protection material of semiconductor devices; it can also be used as sealing filler and elastic adhesive, etc.
The two-component RTV-2 rubber is not as convenient as RTV-1 rubber in use, but its component proportion is variable. One product can obtain vulcanized products of various specifications and properties, and can be deeply vulcanized. Therefore, it is widely used in the industries of electronics, automobile, machinery, construction, textile, chemical industry, light industry, printing, etc. for insulation, encapsulation, caulking, sealing and prevention. Damp, seismic and roller materials. In addition, because RTV-2 has excellent demoulding performance, it is widely used as soft mold material in the reproduction and manufacturing of cultural relics, handicrafts, toys, electronic appliances, mechanical parts, etc.
One of the typical applications of silicone sealant is glass curtain wall. The glass and aluminum alloy frame are bonded with silicone structural adhesive as the exterior wall material, and the expansion joint is waterproof sealed with silicone weather resistant adhesive. Other applications include peripheral sealing for aluminum alloy doors and windows and plastic steel doors and windows, joint sealing for glass installation and moving trough, sealing for rivets and fixing screws, waterproof sealing between kitchen, bathroom and washroom sanitary ware and mesa, wall and furniture, aquarium and sky