Abstract
Two types of alkyl phenols having different alkyl chain lengths (ethyl phenol and dodecyl phenol) were mixed, for the purpose of obtaining a new acceleration reagent to replace nonyl phenol acknowledged as an endocrine disruptor. The mixing ratio was determined so that the carbon number of the alkyl chain in the mixed alkyl phenols was equal to that in nonyl phenol. The acceleration effect and property of the mixed alkyl phenol system were investigated comparing with that of the nonyl phenol system. As a result, it was clarified that the mixed alkyl phenol system showed almost the same accelerating and plasticizing effects as the nonyl phenol system. Moreover, when a diluted reagent was added to the mixed alkyl phenol system, an ultimate strain of the resin in the tensile test was shown to be larger than that of the nonyl phenol system.
