4-methylene-1,3-dioxolanes as cross-linking agents
4-nitrosodiphenylamine derivatives and their use as coupling...
4-Peroxyester derivatives of trimellitic anhydride
4-valerolactone copolymers
4-Vinyl-2-methylene butanedioic acid compounds
4-[(meth)acrylamidomethyl]-pyrazoles and -isoxazoles, their prep
4.6/4.I copolyamide and a process for the preparation thereof