III International Conference

PP-II-4[(C 6 H 5 ) 2 (CH 2 =CHSi] 2 O >(CH 3 ) 4 (CH 2 =CH) 4 Si 4 O 4 >[CH 3 (CH 2 =CH) 2Si] 2 O> [(CH 2 =CH) 3 Si] 2 O.Besides a series of complex Pt catalysts on the basis of quaternary salts of tetra andbivalent Pt are investigated. Due to nitrogen atom presence they are able simultaneouslydemonstrate both catalytic and inhibiting features, i.e. serve as catalyst-auto inhibitor. Thisallowed to develop single-component polyaddition compositions with high viability understandard conditions and readily vulcanized at elevated temperatures.For obtaining of silicon materials with optimal properties it is necessary to regulate the Ptcontent within well-defined limits. Method of X-ray fluorescence spectrometry as universalanalysis has been employed to calculate quantity of Pt in different catalyst independently onits structure. In order to decrease the influence of ligands and solvents on composition anddensity of silicon matrix it was offered to add catalyst on the basis of 10-100 ppm Pt. As theresult there were achieved limits of detecting for Pt 4 ppm and concentration sensitivity upto-dateconcentration 50 ppm ∆C Pt =2 ppm in silicon matrix.167