Methyloctadecylsiloxane; Poly[oxy(methyloctadecylsilylene)],.alpha.-trimethylsilyl-.omega.-trimethylsiloxy-; SiloxanesandSilicones,Mestearyl; SiloxanesandSilicones,methyloctadecyl,methyl-terminated; Siloxanes and silicones, Me octadecyl; POLYOCTADECYLMETHYLSILOXANE