| 摘要 |
A polyolefinic molding composition comprises a thermoplastic polyolefin, and an organic polyoxy compound and/or an organic polyhydroxy compound. A polyolefinic molding composition comprises: a thermoplastic polyolefin, and an organic polyoxy compound of formula R-[(CH2)n-O]m-H and/or or an organic polyhydroxy compound of formula RO-CH2-C(CH2-OR)3 (0.01 - 1 wt.%). n : 1 - 10; m : 3 - 500; and R : H, OH or 1-10C alkyl (substituted by OH, COOH, COOR, OCH3 or -OC2H5). Independent claims are included for the following: (1) process for improving the resistance of pipes involving thermoplastic polyolefins which are in long-term contact with liquids comprising disinfectants having an oxidizing effect against thermo-oxidative degradation, where the pipes are produced by extrusion of a polyolefinic molding composition; and (2) use of polyoxy compounds or polyhydroxy compounds for improving the stability of pipes involving thermoplastic polyolefins which are in long-term contact with liquids comprising disinfectants having an oxidizing effect, where the polyoxy compounds or the polyhydroxy compounds are added as additive to the thermoplastic polyolefins prior to production of the pipes in an amount of 0.01 - 1 wt.% based on the total weight of polyolefin plus additive. |
