SEBS-based eco-friendly TPO automobile internal decorating material and preparation method thereof

Abstract

The invention discloses a SEBS-based eco-friendly TPO automobile internal decorating material. A TPO surface layer comprises 50-80 parts of SEBS, 10-20 parts of polypropylene, 10-20 parts of tackifying resin, 5-20 parts of homo-polypropylene, 1-5 parts of an auxiliary agent, 0-15 parts an inorganic filling material and 2-5 parts of color master batches. A sponge layer comprises 35-60 parts of polypropylene, 40-55 parts of a toughening material, 15-25 parts of rubber and 20-30 parts of a foaming agent. SEBS is a linear three-block copolymer composed of polystyrene as a tail end segment and an ethene-butylene copolymer prepared through polybutadiene hydrogenation as a middle elastic block, has thermoplasticity, can be re-processed, is environmentally friendly, does not contain nonsaturated double bonds, has excellent aging resistance, contains polybutadiene, has a good handle and appropriate hardness, does not contain rubber and has a small smell and low VOC content.

Description

technical field [0001] The invention relates to the field of automotive interior materials, in particular to an SEBS-based environment-friendly TPO automotive interior material and a preparation method. Background technique [0002] In the interior design of automobiles, in order to achieve a certain feel and aesthetic effect on the instrument panel and door panels, some treatments are usually done on the skeleton. At present, the mainstream methods are: slush molding, polyurethane spraying or direct use of ABS skin. [0003] Taking the interior material of the instrument panel as an example, the soft material can be slush-molded polyvinyl chloride, polyolefin elastomer material, etc. In terms of texture and appearance, polypropylene injection molded parts are far from soft materials. On the other hand, the mold life of slush-molded PVC is generally short, and the interior materials contain halogens and plasticizers, which are not environmentally friendly; polyolefin elasto...

AI Technical Summary

Problems solved by technology

On the other hand, the mold life of slush-molded PVC is generally short, and the interior materials contain halogens and plasticizers, which are not environmentally friendly; polyolefin elastomer materials are recyclable, lightweight and environmentally friendly, and have become a new type of automotive interior. Decorative materials, providing domestic automakers with new solutions for automotive interior materials, but compared with slush-molded PVC products, its feel is harder and the hardness is higher

[0004] ABS is a commonly used hard plastic. Although the PVC-based slush molding process is cheap, it can also bring a good feel to the door panel and instrument panel, but the process control is poor and the odor is large, and high VOC is also difficult to solve. question

Polyurethane spraying also tends to cause uneven thickness; the ABS surface is used as the interior skin, which has the problem of poor hand feeling

[0005] Polyolefin elastomer material has the characteristics of recyclability, light weight and environmental protection. It has become a new type of automotive interior material and provides a new solution for domestic automakers. However, its formula contains rubber components. Obvious rubber smell

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