Kraton Polymers U.S. LLC

Kraton Polymers LLC

Xavier D D J Muyldermans

Carl Lesley Willis

Dale Lee Handlin, Jr

Robert Charles Bening

John E Flood

David Thomas Williamson

Hendrik De Groot

Martine Dupont

Marianne Stol

Koen Van Duin

Neil Riddle

Robert Dossett

Kato Hiroshi

A styrenic block copolymer having one or more polymer blocks A and one or more polymer blocks B is disclosed, where 'A' is a poly(vinylaromatic) block having a molecular weight of greater than 5 kg/mol. The 'B' block has a molecular weight of more than 15 kg/mol, and comprises polymerized 1,3-diene units and vinylaromatic units, wherein the polymerized vinylaromatic units represent 5-40 wt. % of the overall weight of the block &#x201c;B&#x201d;. The polymerized 1,3-diene units comprise more than 80 wt. % of polymerized isoprene units in which 45-80 mol % are 1,4-isoprene addition units. The blocks &#x201c;A&#x201d; and &#x201c;B&#x201d; represent from &#x3e;5 to &#x3c;40 wt. %, and &#x3e;33 to &#x3c;95 wt. %, respectively, relative to the overall weight of the block copolymer. The polymers have physical properties that make them valuable, e.g., as vibration damping materials.

Block copolymers and uses thereof

Selectively hydrogenated block copolymers having semi-crystalline blocks hard blocks and copolymer soft blocks having a combination of excellent physical properties and solvent resistance have been discovered. The block copolymer comprises at least one A block of hydrogenated, polymerized 1,3-butadiene and at least one B block which is a random copolymer or a controlled distribution copolymer of conjugated diene and mono vinyl aromatic monomers in which the conjugated diene monomer units are selectively hydrogenated. Polar functionalized block embodiments of the block copolymers are also disclosed. Compositions comprising the block copolymer and articles made from the block copolymer have also been discovered. A method is disclosed which provides highly isotropic, high strength melt cast films of block copolymers.

Block copolymers having semi-crystalline blocks and compositions and articles made therefrom

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Mont St. Guibert, Belgium

Xavier D D J Muyldermans