Low-hardness, high-strength thermoplastic elastomer with good abrasion resistance and diaphragm including the same

摘要

A thermoplastic elastomer includes (A) a hydrogenated triblock copolymer, (B) a non-aromatic oil, (C) a polyolefin resin, (D) an inorganic filler, (E) a polyphenylene ether resin, and (F) a silicone resin. The thermoplastic elastomer can have good abrasion resistance and antimicrobial activity while possessing low hardness and high strength. Also provided is a molded article using the thermoplastic elastomer.

主权项

1. A thermoplastic elastomer comprising: (A) a hydrogenated triblock copolymer having a weight average molecular weight of about 230,000 to about 400,000 g/mol; (B) a non-aromatic oil; (C) a polyolefin resin; (D) an inorganic filler; (E) a polyphenylene ether resin; and (F) a blend of a silicone resin and a polyolefin, wherein the thermoplastic elastomer has a tensile strength of about 63 kgf/cm2 or more, as measured at 23° C. in accordance with ASTM D638, and an abrasion loss of about 0.2 g or less, as measured in accordance with ASTM D1175 (1000 cycles), having an elongation permanent set (%) of 1.3 to 1.5 at 23° C. measured is accordance with KS M 6518, wherein the thermoplastic elastomer comprises: about 25 to about 55% by weight of the hydrogenated triblock copolymer (A), about 20 to about 50% by weight of the non-aromatic oil (B), about 5 to about 15% by weight of the polyolefin resin (C), about 5 to about 20% by weight of the inorganic filler (D), and about 3 to about 15% by weight of the polyphenylene ether resin (E); and about 0.01 to 5 parts by weight of the blend of a silicone resin and a polyolefin (F), wherein the amounts are based on 100 parts by weight of (A), (B), (C), (D), (E), and (F).