Formaldehyde·phenol·urea polycondensate Urea, polymer with formaldehyde and phenol UREA-PHENOL-FORMALDEHYDERESIN PHENOLFORMALDEHYDEUREARESIN phenol, polymer with formaldehyde and urea sodium bisulfite, sodium sulfite, phenol, formaldehyde, urea resin urea condensation products, with formaldehyde and phenol urea formaldehyde phenol copolymer