The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 2023
Filed:
Dec. 07, 2018
Arkema France, Colombes, FR;
ARKEMA FRANCE, Colombes, FR;
Abstract
The invention relates to a block copolymer comprising at least one rigid polyamide block and at least one flexible block, characterized in that the flexible block has an NH/OH ratio of concentrations of amine chain ends to alcohol chain ends which is within the range from 30 to 150, said concentrations being measured byH NMR (TF/CDCl). The invention also relates to the use of a flexible block for manufacturing a copolymer containing polyamide blocks and flexible blocks that is both hydrolysis-resistant and CO-permeable, with a permeability to COof at least 10 000 cm/m/24 h/atm for a 25 μm film of said copolymer, characterized in that said flexible block has a ratio of amine chain ends to acid chain ends which is within the range from 30 to 150.