68002-18-6 68988-08-9 Isobutylated urea formaldehyde Paraformaldehyde, urea resin, isobutylated Poly(formaldehyde-isobutyl alcohol-urea) Urea, formaldehyde polymer, isobutylated Urea, isobutyl alcohol, formaldehyde polymer Urea, paraformaldehyde, isobutyl alcohol, formaldehyde polymer Urea, polymer with formaldehyde, isobutylated