New monomers of the urethane-dimethylacrylate type were prepd. Their dicarbamate structures differed in diisocyanate-derived central units and in the length of the methacrylate group-terminated oligooxyethylene chains. Poly(urethane-dimethacrylates) prepd. thermally (benzoyl peroxide) or photochemically (camphorquinone-N,N-dimethylaminoethyl methacrylate) at room temp., ranged from hard and stiff to soft and elastic; their glass transition temps. varied with the no. of oxyethylenic units. Macromonomers were prepd. by NaH- or t-BuOK-catalyzed step-growth polyaddition of glycol monomethacrylates. Adhesive monomers were prepd. from oligoethylene glycol monomethacrylates and pyromellitic anhydride. The new materials are believed to be applicable in dentistry, medicine and technology.