BINARY AND TERNARY BLENDS COMPRISING MONOVINYLARENE/CONJUGATED DIENE BLOCK COPOLYEMERS 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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Bibliographische Detailangaben
Hauptverfasser:	STOUFFER, CARLETON, E, RHODES, VERGIL, H, KEANE, JAMES, A, HARTSOCK, DAVID, WILKEY, JOHN, D, CHAFFIN, JAY, M, BROWN, JOHN, M
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
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. L'invention concerne des compositions contenant (i) approximativement de 25 à 95 parties en poids d'un copolymère séquencé monovinylarène-diène conjugué comprenant au moins une séquence de forme générale conique qui contient une proportion de monovinylarène sous forme bloc, inférieure à 90 % en poids des motifs totaux de monovinylarène, et une séquence terminale monovinylarène présentant une masse moléculaire inférieure à 60 000 g/mol; et (ii) approximativement de 5 à 75 parties en poids d'un copolymère monovinylarène-alkyle-(méth)acrylate, contenant (ii-a) des motifs monovinylarène, et (ii-b) soit des motifs alkylacrylate, soit des motifs alkylméthacrylate, soit les deux. Ces compositions conviennent pour des applications comprenant les pellicules rétractables ou les emballages rigides.