Benzoic acid, 4-hydroxy-, polymer with formaldehyde Benzoic acid, p-hydroxy-, polymer with formaldehyde Formaldehyde-4-hydroxybenzoic acid copolymer Formaldehyde-p-hydroxybenzoic acid copolymer Formaldehyde-p-hydroxybenzoic acid polymer Formaldehyde, polymer with 4-hydroxybenzoic acid p-Hydroxybenzoic acid-formaldehyde copolymer