| 摘要 |
What is disclosed are polyolefin compounds, e.g., polyethylene and polypropylene, and articles therefrom made in by conventional solid, melt-phase compounding with oxidized, non-cationized, non-silylated sulfur black pigment, a phenolic antioxidant and a sulfur-containing secondary stabililzer, each in stabilizing amount, specified below, which provide a synergistic improvement in the long term heat aging of polyolefins. Preferably the sulfur black comppund is treated by washing, and reduction in the soluble sodium salts. Also disclosed is melt-phase compounded polyolefin and molded articles made there-from comprising incorporating of carbon black, oxidized, non-cationized, non-silylated sulfur black pigment, a phenolic antioxidant and sulfur-containing secondary stabilizer. |
