| 摘要 |
The invention relates to a copolymer comprising polyamide blocks PA alternated with polyether blocks PE, said PA blocks being formed by homopolyamide blocks PA X.Y obtained by polycondensation of: a linear aliphatic diamine having X carbon atoms, and a carboxylic diacid having Y carbon atoms. Said copolymer is characterised in that it has improved optical properties (transmission at 460nm, 560nm and 700nm) compared with the values obtained for a PA12/PTMG copolymer with the same block size or the same stiffness characterised by bending modulus (Mpa), tensile modulus (Mpa) or Shore hardness D parameters, all measured under the same conditions. |
