BINARY AND TERNARY BLENDS COMPRISING MONOVINYLARENE/CONJUGATED DIENE BLOCK COPOLYMERS AND MONOVINYLARENE/ALKYL (METH)ACRYLATE COPOLYMERS

We disclose compositions, comprising (i) from about 25 parts by weight to about 95 parts by weight of a monovinylarene-conjugated diene coupled block copolymer comprising at least one tapered block, having a blocky monovinylarene content of less than 90 wt% of total monovinylarene units, and compris...

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Hauptverfasser: STOUFFER, CARLETON E, RHODES, VERGIL H, HARTSOCK, DAVID, WILKEY, JOHN D, CHAFFIN, JAY M, BROWN, JOHN M, KEANE, JAMES A
Format: Patent
Sprache:eng ; fre
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Zusammenfassung:We disclose compositions, comprising (i) from about 25 parts by weight to about 95 parts by weight of a monovinylarene-conjugated diene coupled block copolymer comprising at least one tapered block, having a blocky monovinylarene content of less than 90 wt% of total monovinylarene units, and comprising a terminal monovinylarene block having a molecular weight of less than 60,000 g/mol; and (ii) from about 5 parts by weight to about 75 parts by weight of a monovinylarene-alkyl (meth)acrylate copolymer, comprising (ii-a) monovinylarene units and (ii-b) either alkyl acrylate units, alkyl methacrylate units, or both. The compositions can be used in shrink film or rigid packaging applications.