Composition for preparing SEBS/PP blended grafted modification material and preparation method adopting same

Abstract

The invention discloses a composition for preparing an SEBS / PP blended grafted modification material and a preparation method adopting the same. The composition is prepared from, by mass, 90-100 parts of SEBS, 2-8 parts of MAH and 10-15 parts of PP. The preparation method comprises the steps that 1, all the components in the composition are weighed by mass of parts; 2, the weighed SEBS is subjected to forced air drying under the temperature of 55-65 DEG C for 24 h; 3, the dried SEBS is added into a feeder of a two-screw extruder; 4, the weighed MAH and PP are added into molten SEBS in the two-screw extruder for extrusion, and the two-screw rotating speed of the two-screw extruder is 60-150 rads / min; 5, extrudate is subjected to air cooling and grain-sized dicing to prepare granules; 6, the granules are subjected to radiation treatment by means of cobalt-60 radiation source under the limited oxygen phenomenon, the radiation dosage is 1-50 KGray, and the radiation time is 10-30 min. The SEBS / PP blended grafted modification material prepared through the formula and the preparation method ensures the bonding strength in the SEBS bonding process and also keeps the SEBS transparency.

Description

technical field [0001] The invention relates to the field of shoe materials, in particular to a composition for preparing SEBS / PP blended graft modified materials and a method for preparing SEBS / PP blended graft modified materials using the composition. Background technique [0002] Hydrogenated styrene-butadiene-styrene copolymer (SEBS) belongs to the field of thermoplastic elastomers. Because it does not contain unsaturated groups, it has better resistance than styrene-butadiene-styrene copolymer (SBS). UV performance and chemical stability. SEBS has the characteristics of outstanding toughness and good elasticity under low temperature conditions, and SEBS has the advantages of high transparency, so it has great potential application possibilities in shoe midsoles and outsoles. However, SEBS is a non-polar material, and its bonding strength is very low during the bonding process. It can only be used as an inner abdominal filling material in the use of shoe materials, and ...

AI Technical Summary

Problems solved by technology

However, SEBS is a non-polar material, and its bonding strength is very low during the bonding process. It can only be used as an internal filling material in the use of shoe materials, and its application is greatly limited.

In order to meet the application of SEBS in shoe materials, SEBS is generally chemically modified to increase the polarity of the material. The main method currently used is hydrogenated styrene-butadiene-styrene grafted maleic anhydride (SEBS-g- MAH), adding auxiliary auxiliary agents such as reaction aids, initiation aids, initiators, and antioxidants in the chemical method modification process, because more auxiliary agents are added, the transparency of SEBS after modification is greatly reduced, limiting the Application in shoe materials

In addition, chemical method modification is not easy to control the grafting rate more accurately through the process and formula, the grafting is not uniform, the quality of the material is not stable enough, and the bonding force of the material is not enough

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