Foam silicone rubber is a kind of spongy elastomer with pores, which is formed by condensation hydroxy-terminated silicone rubber as base material, hydroxy-hydrogen-containing silicone oil as blowing agent, and vinyl platinum complex as catalyst at room temperature. Foam silicone rubber prepared with room temperature vulcanized silicone rubber has a wide temperature range than other foam elastomers, and has high thermal stability, good insulation, heat insulation and moisture resistance, excellent shock resistance, especially at high frequency shock resistance is better, it is an ideal lightweight packaging material. It can be used for various electronic components, instruments, instruments, aircraft instrument wheels, insulation sandwich filling materials, floating materials in salt spray atmosphere and sealing materials, orthopaedic surgery filling, repair and filling materials.



  introduce:
  Silicone rubber is a linear polyorganosiloxane composed of silico-oxygen bonds (SI-O) alternately composed of its main chain, organic groups (such as methyl, ethyl, vinyl, phenyl, trifluoropropyl, etc.) composed of its side groups. Since the introduction of a small amount of vinyl into the macromolecular structure of silicone rubber can greatly improve the vulcanization and processing properties of silicone rubber, most of the silicone rubber used at present contains vinyl. Methyl vinyl silicone rubber is the most common kind of silicone rubber, which is dominant in silicone rubber products at home and abroad. Due to the particularity of the structure, silicone rubber has many other materials can not have excellent properties at the same time, such as excellent high temperature and low temperature resistance, excellent oil resistance, solvent resistance, UV resistance, radiation resistance, good aging resistance, excellent electrical insulation and chemical stability and physiological inertia.

  Silicone rubber foam material is a porous polymer elastic material prepared by silicone rubber after foaming, also known as sponge silicone rubber, microporous silicone rubber. According to the cell structure, it can be divided into closed cell, open cell and mixed cell foam silicone rubber. Generally speaking, the mechanical strength of open-cell foams is low, but it has better compressive stress relaxation performance, while the mechanical strength of closed-cell foams is good, but its compressive stress relaxation performance is poor. The properties of mixed cell foams are between the two.

  According to the preparation method, silicone rubber foam materials can be divided into room temperature vulcanized silicone rubber foam (RTV) and high temperature vulcanized silicone rubber foam (HTV). Room temperature vulcanized silicone rubber foam usually uses condensed hydroxy-terminated silicone rubber as the base material, and hydroxy-silicone oil as the blowing agent.

  The platinum complex is a kind of spongy elastomer with pores, which is vulcanized and foamed at room temperature as catalyst. Room temperature vulcanized silicone rubber foam is suitable for foam forming in place, which plays the role of filling, sealing and shock absorption. The traditional preparation method of high temperature vulcanized foam silicone rubber is to uniformly mix silicone rubber, foaming agent and vulcanizing agent containing particulate inorganic filler, and then vulcanize and foam through heating to produce silicone rubber foam. High temperature vulcanized foam silicone rubber can be molded into foam sheet, cut after use, can also be extruded and then vulcanized by continuous hot air to make silicone rubber foam strips of various shapes and sections.

 Characteristics and application:
 Foam silicone rubber because of its high thermal stability, good insulation, insulation, moisture resistance and shock resistance, especially at high frequency shock resistance is good, so it is an ideal lightweight packaging material, used in various electronic components, instruments, instruments, flying body instrument wheel can play a "moisture, shock, corrosion" of the "three prevention" protection. In addition, it can also be used as a filling material for adiabatic sandwich, floating material in salt spray atmosphere and sealing material. Foam silicone rubber can also be used as filling, repairing and filling material in orthopaedic surgery.