| 摘要 |
1382062 Photodegradable polyethylene compositions IMPERIAL CHEMICAL INDUSTRIES Ltd 19 May 1972 [10 June 1971] 19890/71 Heading C3P Photodegradable compositions comprise (1) polyethylene, (2) 0À01 to 10 weight per cent of poly-4-methylpentene-1 and (3) 0À001 to 2 weight per cent of a photosensitizer. The sensitizer may be benzophenone, p-lauryl acetophenone, a transition metal halide, a C 8-18 alkyl benzoylacetate of manganese, cobalt, chromium, iron, nickel, zinc, copper or vanadium, iron stearate, ferrocene or dipivalyl ferrocene. The compositions may be made into films, containers and string. Examples describe compositions of polyethylene, poly 4-methylpentene-1 and (1) p-lauryl acetophenone, (2) benzophenone, and (3) iron stearate or dipivalyl ferrocene.
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