| 摘要 |
The invention relates to a copolymer comprising polyamide blocks and polyether blocks having general formula (I) -[PA - PE]<SUB>n</SUB>- , wherein: PA represents a polyamide block, PE represents a polyether block, and n represents the number of -PA-PE- units in said copolymer. The aforementioned blocks originate either entirely from polytrimethylene ether glycol (PO3G) or from a mixture or a copolymer of PO3G and at least one of the following: polyethylene ether glycol (PEG), polypropylene ether glycol (PPG), polytetramethylene ether glycol (PTMG), polyhexamethylene ether glycol and the copolymers of tetrahydrofurane (THF) and 3-alkyl tetrahydrofurane (3MeTHF). The invention relates to the use of said copolymer as: a breathable-waterproof product or an additive conferring breathable-waterproof properties on thermoplastic polymers in order to form a membrane with selective diffusion as a function of the type of gas; and an additive for polyamide 6, polyamide 6.6 or copolyamide 6/6.6, which is intended to be transformed into a film in order to improve the mechanical properties and/or the processability of the polyamide. |
