CAS 68130-41-6 1,3-Propanediol, 2-ethyl-2-(hydroxymethyl)-, polymer with α-hydro-ω-hydroxypoly[ oxy(methyl-1,2-ethanediyl)] and 1,1'-methylenebis[4-isocyanatobenzene], Me Et ketone oxime-blocked (HCID 178573347)|化工社