Rapid curing anaerobic compositions

A method of increasing the cure speed of a (meth)acryl functionalized monomer composition comprising incorporating into said composition an additive comprising a metal salt and the reaction product of:

• (a) a polyfunctional isocyanate and a member selected from the group consisting of an hydroxy and an amine;
• or
• (b) a phosgene and a material selected from the group consisting of an amine, an amide, a thiol and an alcohol;
• or
• (c) a monohydroxy compound, a diisocyanate and a polyamine.

An anaerobically curable composition comprising:

• (a) a (meth)acrylate ester monomer, at least a portion of which includes an aromatic substituted phenoxy (meth)acrylate;
• (b) a peroxide;
• and
• (c) a cure speed accelerator comprising an alkali metal cation and the reaction product of:
• (i) a polyfunctional isocyanate and a member selected from the group consisting of an hydroxy and an amine;
• or
• (ii) a phosgene and a compound having 3 to 7 polyethylene ether units terminated at one end with an ether group and at the other end with a reactive functional group selected from the group consisting of an amine, an amide, a thiol and an alcohol;
• or
• (iii) a monohdyroxy compound, a diisocyanate and a polyamine, wherein said composition exhibits increased cure speed and strength as compared to the same composition without said cure speed accelerator.