Chain extended urethane diacrylate and dental impression formation

摘要: Disclosed is a new urethane polyacrylate having at least one terminal isocyanato acrylic pendent radical. Preferably the molecular chain within acrylate caps has been extended with polyhydroxy compound just before final end capping acrylic. The preferably ethyl methacrylate and diisocyanate capped polyether radical oxyalkylene. method for producing involves polyol yielding reaction product two reactive equivalents of isocyanate then less than all hydroxyacrylate, after which remaining reacted to provide extension. extending Also disclosed impression material application mammalian tissue curing in contact therewith; including free polymerizable resin, alkyl benzensulfonyl titanate, polymerization initiator, filler; use.