Stress-cracking-resistant halogen-free flame-retardant TPE (thermoplastic elastomer)
A stress-cracking-resistant and elastomer technology, applied in the field of plastic materials, can solve the problems of cracking and high residual stress of products, and achieve the effects of simple process steps, good adhesion and reasonable formula
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Embodiment 1
[0026] SEBS rubber resin 20%, softening plasticizer 15%, flame retardant 25%, polyphenylene ether 14%, carbon-forming plastic 4%, polypropylene resin 10%, polyethylene 3%, compatibilizer 5%, black Masterbatch 2.4%, silicone masterbatch 1%, antioxidant 0.3%, light stabilizer 0.3%;
[0027] The preparation steps are: (1) first fully absorb the softening plasticizer with SEBS rubber resin, and then absorb the SEBS rubber resin, flame retardant, polyphenylene ether resin, polypropylene, polyethylene, carbon-forming Plastics, silicone masterbatches, antioxidants, and light stabilizers are fully mixed in proportion to obtain a mixture; in this embodiment, the step (1) is carried out in a high-speed mixer.
[0028] (2) Add the mixture into a twin-screw extruder with an aspect ratio of 40:1 to 48:1, an extrusion temperature of 210 to 250°C, and a rotation speed of 300 to 500 rpm for melting and kneading, and then extrude in sequence Stress cracking-resistant, halogen-free, flame-reta...
Embodiment 2
[0031] A stress-cracking-resistant halogen-free flame-retardant TPE elastomer and its preparation method provided in this example are basically the same as in Example 1, the difference being that it consists of the following raw materials in mass percentage: SEBS rubber resin 20% , softening plasticizer 15%, flame retardant 25%, polyphenylene ether 14%, carbon-forming plastic (TPU) 4%, polypropylene resin 10%, polyethylene 3%, compatibilizer 5%, black masterbatch 2.4 %, silicone masterbatch 1%, antioxidant 0.3%, light stabilizer 0.3%.
Embodiment 3
[0032] Example 3, a stress-cracking-resistant halogen-free flame-retardant TPE elastomer and its preparation method provided in this example are basically the same as in Example 1, except that it consists of the following raw materials in mass percentage: SEBS Rubber resin 20%, softening plasticizer 15%, flame retardant 25%, polyphenylene ether 14%, carbon-forming plastic (TPU, PA6 half each) 4%, polypropylene resin 10%, polyethylene 3%, phase Compatibility agent 5%, black masterbatch 2.4%, silicone masterbatch 1%, antioxidant 0.3%, light stabilizer 0.3%
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