Halogen-free flame-retardant SEBS thermoplastic elastomer composition and preparation method thereof

A thermoplastic elastomer and composition technology, applied in the field of polymer material modification, can solve the problems of reduced mechanical properties, large smoke generation, and only 2.9 MPa tensile strength of composite materials, so as to achieve good processing performance and improve mechanical properties Effect

Active Publication Date: 2012-10-03
广州市新兴电缆实业有限公司
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Problems solved by technology

Chinese invention patent (CN200810207538.4) discloses a halogen-free flame-retardant elastomer composite material and its preparation method. The patent uses SEBS and polypropylene as the matrix, and nitrogen-phosphorus ammonium polyphosphate as the main flame retardant. Magnesium is an auxiliary flame retardant. When the total amount of flame retardant added is 33wt%, it can reach UL94V-0 level, but the tensile strength of the obtained composite material is only 2.9MPa, and the flame retardant system has a great influence on the performance of SEBS matrix
Chinese invention patent (CN200710046721.6) discloses a halogen-free flame-retardant elastomer composite material and its preparation method. The patent uses ethylene-propylene block copolymer, SEBS, and eth

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  • Halogen-free flame-retardant SEBS thermoplastic elastomer composition and preparation method thereof
  • Halogen-free flame-retardant SEBS thermoplastic elastomer composition and preparation method thereof

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[0020] The present invention will be further described below in conjunction with embodiments, but the embodiments of the present invention are not limited thereto. The raw materials used in the examples of the present invention, SEBS, paraffin oil, and magnesium hydroxide were purchased from the market. The brands and manufacturers are shown in Table 1, and the antioxidants are brand names.

[0021] Table 1 Brands and manufacturers of main raw materials

[0022] Raw materials

[0023] The boron-containing phenylphosphonate flame retardant was prepared in accordance with Example 1 and Example 5 of the Chinese invention patent (CN201110249820.0). The number average molecular weights of the two flame retardants measured by gel chromatography were 1000 and 1400, respectively, which were recorded as BPP1 and BPP2.

[0024] The raw materials of the halogen-free flame-retardant SEBS thermoplastic elastomer composition of Examples 1 to 5 are as shown in Table 2. The preparation methods a...

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Abstract

The invention discloses a halogen-free flame-retardant SEBS (styrene-ethylene-butadiene-styrene block copolymer) thermoplastic elastomer composition and a preparation method thereof. The raw material formula of the composition is composed of the following components by mass percent: 19-30% of SEBS, 10-17% of paraffin oil, 50-60% of magnesium hydroxide, 4-10% of boron-containing phenyl phosphonate flame retardant and 0.2-0.4% of antioxidant. The composition is prepared by the steps: mixing the boron-containing phenyl phosphonate flame retardant with magnesium hydroxide in a high-speed mixer to obtain a halogen-free flame retardant complex; and sufficiently and uniformly mixing swelled SEBS, the halogen-free flame retardant complex and the antioxidant, melting, mixing and extruding by a twin-screw machine, cooling, pelleting and drying. According to the invention, the boron-containing phenyl phosphonate flame retardant not only has flame retardant synergistic action with magnesium hydroxide, but also has a effect, and can well improve the mechanical properties of the halogen-free flame-retardant SEBS thermoplastic elastomer composition, so that the processing performance of the composition is excellent.

Description

Technical field [0001] The invention relates to a halogen-free flame-retardant hydrogenated styrene-butadiene-styrene block copolymer (SEBS) thermoplastic elastomer composition and a preparation method thereof, and belongs to the technical field of polymer material modification. Background technique [0002] Thermoplastic elastomer is a kind of polymer material that exhibits rubber elasticity at room temperature and can be plasticized and formed at high temperature. It has the advantages of convenient processing and recyclability. Styrenic block copolymer type thermoplastic elastomer is one of the earliest researched thermoplastic elastomers. SEBS is a polystyrene type thermoplastic elastomer. Due to the high saturation of the main chain of the SEBS molecule, it has excellent stability, heat resistance, Oxidation resistance, weather resistance and solvent resistance, it has excellent application properties of rubber without vulcanization, and it can be thermoplastic processed lik...

Claims

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Application Information

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IPC IPC(8): C08L53/02C08L91/06C08K3/22C08K5/55
Inventor 赵建青邓娟刘述梅赵颖刘运春
Owner 广州市新兴电缆实业有限公司
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