| 摘要 |
It has been found that substituted hydroquinones function as a shortstop agent in the polymerization of vinyl monomers. The substituted hydroquinones have the formula: <IMAGE> wherein <IMAGE> wherein p is 1 or 2 and q is 0 or 1; provided that p+q=1 or 2. The groups R1, R2, R3, R4, Z and W are defined hereafter. The compounds 2,5-di-t-amylhydroquinone and 2,5-di-t-butylhydroquinone are particularly desirable as shortstop agents in the polymerization of vinyl chloride.
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