FILLING PROCESS FOR SILOXANE RUBBER AT THE (INSITU) HARDENING STAGE

The filling process mechanisms at the in situ hardening stage for SKTN -A liquid dimethylsiloxane rubber (K-18 hardener) have been examined. Rheological and IR spectroscopic techniques, both in the absence and t he presence of SKTN, have been used to study the hydrolytic condensati on reaction of ethyl silicate (filler formation reaction) catalyzed by tin diethyldicaprylate. Experimental data are presented concerning in situ filling acceleration at high K-1.8 concentrations with the diphe nyldichlorosilane (DPDCS) added as the rubber inhibitor.