| 摘要 |
Polypropylene copolymer pipe molding materials are prepd. by melt- blending polypropylene-ethylene copolymer 75-95 wt.% (contg. ethylene 3-10 %, i.e. EPR, EPDM), ethylene-propylene elastomer (the mole ratio of ethylene; propylene; dien=62-82:13-17:1-5, vulcanized with peroxides or other vulcanizing agent before or during blending) 5-25 wt.%, small amts. of antioxidizing agent i.e. 2,6-di-t-butyl-4-methyl phenol, and additives.
|
