Kraton Polymers LLC

Kraton Corporation

Kraton Polymers Research B.v.

Aparajita Bhattacharya

Donn Anthony Dubois

Koen Van Duin

Huixian Yang

Xavier D D J Muyldermans

Xavier DDJ Muyldermans

A hydrogenated block copolymer is disclosed comprising a polymer block A and a polymer block B. Prior to hydrogenation, the polymer block A has a first vinyl aromatic compound, and the polymer block B contains monomers a) a styrene compound having a radical reactive group and b) at least one conjugated diene, and optionally (c) a second vinyl aromatic compound that is same or different from the first vinyl aromatic compound. The repeat units of monomer a) forms 10-80 wt. % of the total block copolymer, and 10-70 wt. % of the total weight of block B. After hydrogenation, the polymerized units derived from the monomer b) has a RU of 0-1.5 meq per gram of the hydrogenated block copolymer. The hydrogenated block copolymer exhibits reactivity and higher flow properties before curing, after curing, shows excellent mechanical properties, improved flame resistance, and good solvent resistance.

Block copolymers and uses thereof

Disclosed herein in is a medical tube comprising a hydrogenated styrenic block copolymer having a formula A-B-A, (A-B-A)X or (A-B)X is disclosed, where n is an integer from 2 to 30, and X is residue of a coupling agent. Prior to hydrogenation, each A block is a monoalkenyl arene homopolymer block having a true peak molecular weight of 5 kg/mol to 15 kg/mol. Each B block is a controlled distribution copolymer block having a true peak molecular weight of 30 kg/mol to 200 kg/mol. The hydrogenated styrenic block copolymer has a midblock poly(monoalkenyl arene) content of 35 wt. % to 50 wt. % based on the total weight of the midblock, and physical properties that makes it useful for producing medical tubes having kink resistance.

Medical tubing and compositions and methods for making therefor

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Houston, TX, United States of America

Aparajita Bhattacharya