Radical polymerizable macrocyclic resin compositions with low polymerization stress

Abstract

A composition of macrocyclic oligomer with at least one (meth)acrylate polymerizable group. A method includes preparing an activated precursor of an oligomer at pseudo high-dilution conditions. A method also includes preparing an activated precursor of an oligomer by reacting the precursor with an activated coupling agent, wherein the precursor is condensable and polymerizable.

1 . A method of preparing a dental composition comprising a polymerizable macrocyclic oligomer, comprising the step of preparing an activated precursor of an oligomer and the step to form such macrocyclic resin at pseudo high-dilution conditions such that the polymerizable macrocyclic oligomer is present in solution at a final concentration of 0.02 M. 
     
     
         2 . A method claimed in  1 , wherein said activated precursor is liquid, crystalline solid or a combination of both. 
     
     
         3 . A method as in  claim 1 , wherein said precursor itself is either polymerizable or nonpolymerizable. 
     
     
         4 . A method as in  claim 1 , comprising the step of reacting said precursor with a coupling agent selected from the compounds or resins containing a group consisting of primary diols, secondary amines, diacids and combinations thereof. 
     
     
         5 . A method as in  claim 4 , wherein said coupling agent is aliphatic, aromatic or both.