Oxirane, 2-methyl-, polymer with oxirane, bis[N-[[5-[[9-methoxy-2,5-bis(3-methoxy-3-oxopropyl)-9-methyl-1-oxo-10-oxa-2,5-diaza-9-silaundec-1-yl]amino]-1,3,3-trimethylcyclohexyl]methyl]carbamate]