Aryl-substituted biguanides are rubber vulcanization accelerators of moderate activity. The relation between the chemical constitution of the substituted radicals and the activity of the biguanides is, in general, about the same as found by other investigators for other types of accelerators. α-o-Tolylbiguanide has a fairly great activity in certain commercial rubber stocks.

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Rubber Division, American Chemical Society, Inc.
1928
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