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

• Main Authors: Handlin, Jr., Dale L, Bening, Robert C, Willis, Carl L, Dossett, Robert, Williamson, David T, Muyldermans, Xavier D. D. J, De Groot, Hendrik, Flood, John E
• Format: Patent
• Language: English
• Published: 28.04.2020
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

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.