colo 22 parts by wt of a branched c 24 monovinyl ether i e the monovinyl ether of 2 decyl tetradecanol 4 parts by wt of a coupling agent e g 3 parts of a 186 i e b 3 4 epoxycyclohexyl ethyl trimethoxysilane and one part of a 174 i e g methacryloxypropyl trimethoxysilane both of which are available from osi specialities endicott n y and catalysts employed herein include perkadox 16s di 4 tert butylcyclohexyl peroxydicarbonate available from akzo nobel trigonox 141 2 5 dimethyl 2 5 di 2 ethylhexanoylperoxy hexane available from akzo nobel and witco usp90md 1 1 bis tert amylperoxy cyclohexane available from witco chemical each of these catalysts has a 10 hour decomposition half life of 70 u00b0 c or less and were added to the base formulation described above at levels of 1 3 or 5 parts by wt thus nine pastes were made for testing each filled with 77 wt silver flake a differential scanning calorimetr dsc and a void test was performed on each paste the void test was performed using a copper clad bt bismaleimide triazine resin with taiyo psr 4000 version aus5 solder mask the substrate was placed in an 85 85 chamber for 15 16 hours to insure that moisture absorption would be evident the nine plates were attached to the substrate using a glass cover slide 300 u00d7 300 mils the pastes were cured at 150 u00b0 c for 60 seconds on a hot plate apparatus the dsc was performed at a ramp rate of 10 u00b0 c min the sample size.