THERMOPLASTIC ELASTOMER COMPOSITION
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United States of America Patent
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Issued Date -
May 23, 2024
app pub date -
Feb 24, 2022
filing date -
Mar 5, 2021
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Abstract
A thermoplastic elastomer composition including 100 parts by mass of a block copolymer containing a polymer block (X) having an aromatic vinyl compound as a main component and a polymer block (Y) having a conjugated diene compound as a main component, or a hydrogenated product thereof (A); 1 to 400 parts by mass of an ethylene/α-olefin copolymer (B) satisfying the following requirements (b-1) to (b-3); and 0 to 200 parts by mass of a polyolefin-based resin (C) satisfying the following requirement (c-1), (b-1) a kinematic viscosity at 100° C. is 5 to 5,000 mm2/s and a kinematic viscosity at 40° C. is 50 to 100,000 mm2/s, (b-2) a weight-average molecular weight (Mw) determined by gel permeation chromatography (GPC) is 1,000 to 30,000, (b-3) a content ratio of ethylene structural units is 15 to 85 mol %, and (c-1) MFR (230° C. and 2.16 kg) is 0.1 to 500 g/10 min.
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