31409856urea-formaldehyde resinPT2026-03-30 20:50:12UF31409857formaldehyde, ureaNDUF31409858resin, ureaNDUF31409859resin, urea-formaldehydeNDUF31409860ureaNDUF31409861urea formaldehydeNDUF31409862urea resinNDUF31409863urethane elastomersNDBT31370941amino resinPTNT31436388aminoaldehyde resinPTRT31373554ureaPT