| abstract |
Carboxamide compositions comprising N-substituted amides of polyisobutylcarboxylic acids, said acids consisting essentially of a mixture of (I) AT LEAST ABOUT 80%, BY WEIGHT, OF A POLYISOBUTYLCARBOXYLIC ACID COMPONENT CHARACTERIZED BY SUBSTANTIALLY ALL CARBOXYL GROUPS BEING ATTACHED TO TERTIARY CARBON ATOMS, AND BY LESS THAN ABOUT 20% OF SAID ACID COMPONENT BEING EXTRACTABLE BY SUCCESSIVE TREATMENTS AT 25 DEG C with aqueous alkali and with water, and (II) UP TO ABOUT 20%, BY WEIGHT, OF A NEUTRAL POLYISOBUTYL COMPONENT, THE POLYISOBUTYL PORTIONS OF COMPONENTS (I) AND (II) HAVING AN AVERAGE MOLECULAR WEIGHT OF ABOUT 750 TO 3000; THE N-substituted component of the carboxamide having the formula, -N(R)Z, where R is hydrogen or lower alkyl and Z is a particular heterocyclic or aliphatic polyamine. |