Thermoplastic elastomer, preparation method and use thereof

Abstract

The invention relates to a thermoplastic elastomer, which comprises the following compositions by gross weight percentage: A. 5 to 85 percent of polypropylene; B. 5 to 90 percent of vinylated styrene hydrogen / conjugated diolefine segmented copolymer; and C. 5 to 90 percent of polyolefin thermoplastic elastomer. The preparation method is to physically mix mixture of various compositions for manufacturing transparent coating materials and so on. The thermoplastic elastomer has the advantages that the thermoplastic elastomer has good transparency, does not contain plasticizer such as processing oil and so on, so that emigration of the thermoplastic elastomer during the use process is avoided, thereby guaranteeing the absolute safety of the thermoplastic elastomer when applied to products such as foodpack, medical appliances and so on; the product is soft; the shore A rigidity is between 0 and 95; the flow rate of fused masses is between 0.1 and 100 grams per 10 minutes; and the thermoplastic elastomer has good weathering resistance, chemical resistance and solvent resistance.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a thermoplastic elastomer and its preparation method and application. Background technique [0002] Traditional thermoplastic elastomers include materials such as PVC blends, TPU, etc., and their safety in use is increasingly the main focus of attention, especially for food packaging, wire and cable coating materials, electronic devices, toys, etc. even more so. PVC blends, due to the need to add plasticizers in the processing process, such as plasticizer DOP, which has adverse effects on the human body and the environment, are easy to move out during the use of PVC products, and their applications have been gradually restricted; by TPU The transparent material products made by etc., their chemical corrosion resistance, weather resistance and other properties are generally poor. [0003] Adding plasticizers, such as processing oil, to thermoplastic elastomers is a commonly used...

AI Technical Summary

Problems solved by technology

PVC blends, due to the need to add plasticizers in the processing process, such as plasticizer DOP, which has adverse effects on the human body and the environment, are easy to move out during the use of PVC products, and their applications have been gradually restricted; by TPU The transparent material products made by etc., their chemical corrosion resistance, weather resistance and other properties are generally poor

[0003] Adding plasticizers, such as processing oil, to thermoplastic elastomers is a commonly used preparation process. Traditional techniques are used to blend plasticizers, hydrogenated styrene thermoplastic elastomers and polyolefins. Disadvantages such as poor heat resistance, poor weather resistance, easy migration of processing oil, volatile and opaque products

Publication number CN1966560 discloses a thermoplastic elastomer, using SEBS, PP, rubber filler oil as the base material, adding POE and modifiers, although the heat resistance is improved, but still using processing oil

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