Matte thermoplastic polyurethane elastomer with high physical properties and preparation method thereof

Abstract

The invention discloses a high-physical-property matte thermoplastic polyurethane elastomer and a preparation method thereof. The high-physical-property matte thermoplastic polyurethane elastomer is prepared from the following ingredients in percentage by mass: 80 to 95 percent of thermoplastic polyurethane elastomer, 2.5 to 19 percent of high impact polystyrene, 0.5 to 2 percent of matte surfaceregulating agents, 0.1 to 0.5 percent of modified silicone master batch, 0.1 to 0.5 percent of antioxidant and 0.1 to 0.5 percent of lubricating agent. Compared with the prior art, the high-physical-property matte thermoplastic polyurethane elastomer has the advantages that the matte surface effect is good; the cost is lower; the defects of material physical property reduction due to the use of inorganic matte surface agent and poor matte surface effect are avoided; the defect of higher cost due to the use of other organic macromolecular material matte surface agents is avoided; in addition, the processing process can be regulated according to practical requirements to obtain the ideal matte effect.

Description

technical field [0001] The invention relates to a matte polyurethane elastomer and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) has good tear resistance, wear resistance and low temperature flexibility, and is being used in more and more fields and products, such as shoe materials, mobile phone cases, wires and cables, films, conveyor belts etc. Especially as people's requirements for environmental protection are getting higher and higher, TPU is gradually replacing polyvinyl chloride (PVC) and applied to various films, wires and cables and other products. [0003] However, the surface of wires and cables made of pure TPU is generally brighter, which affects the appearance, and some products will require matte materials. [0004] In order to make TPU achieve a matte effect, the methods currently used are: [0005] 1. Add inorganic matting agent powder, such as nano zinc oxide, aluminum oxide, magnesium oxide or fum...

AI Technical Summary

Problems solved by technology

However, the compatibility between the matting agent and TPU is poor, and the uneven dispersion will lead to a rough appearance, and there is severe shear in the ordinary twin-screw modification process, which will lead to excessive screw torque during the modification process and affect production capacity. , and severe shearing will also lead to a substantial degradation of TPU, thereby reducing the physical properties. From the examples, the maximum tensile strength does not exceed 31Mpa, which greatly limits the application in some products with high strength requirements

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