C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 53/02 (2006.01) C08F 297/04 (2006.01) C08L 25/14 (2006.01)
Patent
CA 2556017
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.
Brown John M.
Chaffin Jay M.
Hartsock David
Keane James A.
Rhodes Vergil H.
Chevron Phillips Chemical Company Lp
Smart & Biggar
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