Halogen-free flame-retardant thermoplastic elastomer

Abstract

The invention belongs to the field of plastic elastomers, and relates to a halogen-free flame-retardant thermoplastic elastomer. Silsesquioxane modified silicon dioxide aerogel is added in the process of preparing the plastic elastomer, so that pores of the silicon dioxide aerogel can be well reserved and the dielectric constant of the whole thermoplastic elastomer can be reduced under the condition that the original mechanical properties of the thermoplastic elastomer are not changed. Amino groups and epoxy groups react to enable silsesquioxane to cover silicon dioxide aerogel. On one hand, a base material can be prevented from entering the silicon dioxide aerogel to block pore channels and affect the dielectric constant; and on the other hand, an inorganic silicon cage core in silsesquioxane is heated and decomposed to form a compact ceramic barrier layer, release of combustible gas and entering of external heat into the interior are isolated, further decomposition of internal materials is delayed, and good flame retardant performance is achieved.

Description

technical field [0001] The invention belongs to the field of plastic elastomers and relates to a halogen-free flame-retardant thermoplastic elastomer. Background technique [0002] Thermoplastic elastomer has the elasticity of rubber at room temperature, and is a type of elastomer that can be plasticized at high temperature. It is a new type of polymer material between rubber and resin. It is often called the third generation of rubber. At present Market thermoplastic elastomers have been widely used in the automotive industry, communication equipment, building materials, electronic appliances, medical and health care and consumer goods and other fields. [0003] As we all know, communication components usually need a shell that protects against electromagnetic interference to prevent them from being damaged by external electromagnetic or radiation interference. There are certain restrictions on the dielectric constant and tangent loss value, and it is often required that t...

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Problems solved by technology

However, these often ignore that many communication materials are used outdoors, which require a certain degree of aging resistance, and when the heat in the system dissipates slowly, it is easy to burn. At the same time, the market is also in urgent need of outsourcing communication materials with better weather resistance and flame retardancy. Therefore, there are corresponding requirements for the flame retardancy of the product. The Chinese patent application document (publication number: CN 110283386 A) discloses a thermoplastic elastomer with low dielectric constant and flame retardancy and its preparation method, but the patent requires All materials are low-dielectric materials, and the requirements for material selection are relatively high.

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