B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/34 (2006.01) C08G 69/40 (2006.01) C08G 69/44 (2006.01) D06N 3/12 (2006.01) D21H 19/30 (2006.01)
Patent
CA 2282675
The invention concerns a multilayer structure comprising a material coated with a block polyamide and block hydrophilic copolymer, said copolymer having a melting point less than 135 ·C and preferably between 90 and 135 ·C. Said structure is impermeable to liquid water and permeable to water vapour. The invention also concerns methods for preparing said block polyamide and block hydrophilic copolymers. It further concerns novel block polyamide and block polyether copolymers.
Structure multicouches comprenant un matériau recouvert par un copolymère à blocs polyamides et blocs hydrophiles, ledit copolymère ayant une température de fusion inférieure à 135 ~C et de préférence comprise entre 90 et 135 ~C. La structure de l'invention est barrière à l'eau liquide et perméable à la vapeur d'eau. L'invention concerne aussi des procédés de préparation de ces copolymères à blocs polyamides et blocs hydrophiles. Elle concerne aussi des nouveaux copolymères à blocs polyamides et blocs polyéther.
Aubert Yves
Briffaud Thierry
Faulhammer Heike
Hilgers Hermann Josef
Roumilhac Didier
Atofina
Elf Atochem S.a.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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