Halogen-free fire-retardant thermoplastic elastomer material and preparation method thereof

Abstract

The invention provides a halogen-free fire-retardant thermoplastic elastomer and a preparation method thereof. The halogen-free fire-retardant thermoplastic elastomer material comprises the following raw materials in part by weight: 15 to 25 parts of styrene-ethylene-ethylene / propylene-styrene (SEEPS), 10 to 20 parts of polypropylene, 10 to 15 parts of polyolefin elastomer (POE), 30 to 40 parts of halogen-free fire retardant, 10 to 15 parts of compatilizer, 0.1 to 0.3 part of antioxidant and 15 to 25 parts of mineral oil. The SEEPS with larger cohesive energy is taken as a modification base material and is matched with low-hardness polypropylene and the compatilizer, the halogen-free fire-retardant thermoplastic elastomer material is low in hardness, is high in elastic resilience, tensile strength and elongation at break, and has a smooth surface.

Description

【Technical field】 [0001] The invention relates to the field of polymer materials, in particular to a halogen-free flame-retardant thermoplastic elastomer material and a preparation method thereof. 【Background technique】 [0002] Since the internal binding energy of the block copolymer SEEPS is quite high, it will neither dissociate automatically above the Tg of polystyrene nor dissociate under the action of external mechanical force, so the tensile strength and modulus of SEEPS Both are higher than general-purpose SBS, making SEEPS far superior to ordinary linear and star-shaped SBS in practical applications, and comparable to ethylene-propylene rubber in non-dynamic applications. In recent years, SEEPS thermoplastic elastomers have been widely used in automotive parts and tool handles, wires and cables, medical products and food containers, coatings, and polymer blending and modification. However, SEEPS thermoplastic elastomer is flammable and the flame spreads fast, which...

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Problems solved by technology

However, SEEPS thermoplastic elastomer is flammable and the flame spreads fast, which greatly limits its application range

[0003] In the past, the addition of organohalogen compounds was widely used, but organohalogen compounds produce toxic gases during combustion, which has been restricted in recent years

For halogen-free flame retardants, due to the molecular structure of SEEPS elastomers, it is necessary to add a large amount of flame retardants to achieve the flame retardant effect, and the plasticity and mechanical properties of the material are greatly reduced

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