(CHLOROMETHYL)PHENYLETHYL-POSS;PSS-[2-[(4-Chloromethyl)phenyl]ethyl]-Heptacyclopentyl substituted;1-[2-[(CHLOROMETHYL)PHENYL]ETHYL]-3,5,7,9,11,13,15-HEPTACYCLOPENTYLPENTACYCLO[9.5.1.13,9.15,15.17,13]OCTASILOXANE;1-[2-[(Chloromethyl)phenyl]ethyl]-3,5,7,9,11,13,15-heptacyclopentylpentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, mixture of isomers;(Chloromethyl)phenylethyl-POSS(R), 1-[2-[(Chloromethyl)phenyl]ethyl]-3,5,7,9,11,13,15-heptacyclopentylpentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, mixture of isomers