The invention provides a radically polymerizable compound wherein an acid group is joined via a spacer group to a polyethyleneimine group. The polyethyleneimine group has at least one radically polymerizable group in the side chain and/or terminally. The invention relates further to a process for preparing such compounds by cationic polymerization of oxazolines, to the use of such compounds as constituents of a dental material, and to a dental material comprising the compounds of the invention.

[bis[2-[bis(phosphonomethyl)amino]ethyl]amino]methylphosphonic acid metal salt may be used as a scale inhibitor in wellbore applications. Said scale inhibitors and related methods may incorporate controlled release characteristics. For example, a scale inhibition method may include introducing [bis[2-[bis(phosphonomethyl)amino]ethyl]amino]methylphosphonic acid metal salt (e.g., as a particulate thereof or adsorbed in a porous particle) into a wellbore penetrating a subterranean formation; heating the Compound I to a temperature of 150 F. or greater while in the wellbore and/or in the subterranean formation so as to release the Compound I; and inhibiting scale in a portion of the wellbore and/or the subterranean formation.