Styrol/butadiene block copolymer mixtures for shrink films

US9090768B2 · kind B2 · utility

Assignee

• STYROLUTION EUROPE GMBH · DE

Inventors

• Konrad Knoll · Mannheim, DE
• Helmut Steininger · Neu-Anspach, DE
• Michael Schuster · Jacksonville, US
• Daniel Wagner · Bad Dürkheim, DE
• Peter Merkel · Long Valley, US

Key dates

• Filing date: Dec 31, 2005
• Grant date: Jul 28, 2015
• Expiry date: Dec 17, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L53/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A mixture which comprises from 5 to 50% by weight of a block copolymer A, which comprises one or more copolymer blocks (B/S)A each composed of from 65 to 95% by weight of vinylaromatic monomers and from 35 to 5% by weight of dienes and of a glass transition temperature TgA in the range from 40° to 90° C.; from 95 to 50% by weight of a block copolymer B, which comprises at least one hard block S composed of vinylaromatic monomers and comprises one or more copolymer blocks (B/S)B each composed of from 20 to 60% by weight of vinylaromatic monomers and from 80 to 40% by weight of dienes and of a glass transition temperature TgB in the range from −70° to 0° C.; from 0 to 45% by weight of polystyrene or of a block copolymer C other than A and B; and from 0 to 6% by weight of a plasticizer; and its use for production of shrink films.