| 摘要 |
Copolymers comprising within the range of 40 to 89 wt. percent ethylene, 10 to 40 wt. percent of vinyl ester of C2 to C4 monocarboxylic acid, and 1 to 30 wt. percent of unsaturated ester having a C10 to C22 alkyl group and having number average molecular weights within the range of 1,000 to 50,000, are useful in oil, e.g., as pour point depressants in distillate petroleum fuels and as dewaxing aids.
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