| 摘要 |
A copolyether ester composition which includes a blend of at least one copolyether ester, having polyester hard segments and aliphatic polyether soft segments and a hardness lower than 46 Shore D, and at least one polyester with hardness higher than 60 Shore D, which is compatible with the polyester hard segments. The components are present in a mass ratio of 9/1 to 1/9. The composition has a modulus at -40° C. lower than 500 MPa and at 190° C. higher than 10 MPa, and a melt viscosity of at least 1 kPa.s. An air bag cover moulded thereof, optionally painted, passes an air bag deployment test at -35±2° C. A process for preparing such a copolyether ester composition and to a process for making an air bag cover are disclosed.
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