Ternary ethylene propylene terpolyer rubber/polypropylene thermoplastic elastomer

Abstract

The ethylene propylene terpolymer / polypropylene thermoplastic elastomer consists of ethylene propylene terpolymer, polypropylene, cross-linking agent, cross-linking catalyst, plasticizer and processing assistant. It is prepared with ethylene propylene terpolymer, polypropylene, polysiloxane as cross-linking agent chloroplatinic acid as cross-linking catalyst, plasticizer and processing assistant and through cross-linking, dispersing, extruding and pelletizing in a double screw extruder. The present invention has the advantages of controllable cross-linking degree and cross-linking rate, the processing performance of thermoplastic plastic, the elasticity of rubber, light color, etc; and may be applied in automobile inside ornament, medical utensil, etc.

Description

Technical field [0001] The invention relates to a thermoplastic elastomer material, in particular to an EPDM / polypropylene thermoplastic elastomer. The main feature of the material is that polysiloxane is used as a crosslinking agent, and chloroplatinic acid is used as a crosslinking catalyst. In the presence of oil, fillers and processing aids, the EPDM rubber is crosslinked and dispersed in polypropylene. Out granulation to obtain thermoplastic elastomer. Background technique [0002] Thermoplastic elastomer (TPE) combines the high elasticity of traditional rubber with the thermoplastic processing performance of resin, and can use existing resin processing equipment and processing methods (such as calendering, injection, blow molding, etc.) to manufacture rubber products. More importantly, it can be processed multiple times like resin and be recycled and reused, which can greatly meet the requirements of low-energy processing, diversified processing, precision processing, and r...

AI Technical Summary

Problems solved by technology

However, thermoplastic elastomers prepared with phenolic resin cross-linking systems also have obvious disadvantages: there is formaldehyde emission during production and processing, which is not friendly to the environment; the aldehyde in the product will absorb water, so it must be dried before processing; in addition, The product also tends to have an annoying odor and the product is often yellow or light yellow in color

The use of peroxide crosslinking systems can produce products with a lighter color than phenolic resin crosslinking systems, however, because peroxides can cause degradation of polypropylene, which has an adverse effect on the physical properties of thermoplastic elastomers