Fast,curing two part anaerobic adhesive composition
View Patent ↗The present invention concerns improved polymerizable anaerobic compositions which contain (meth)acrylic ester monomers, peroxy polymerization initiators, saccharin a saccharin derivative or a related sulfimide derivative and an activator containing a ferrocene moiety.
1. A method for sealing or bonding at least two substrates comprising:
a. applying to at least one of said substrates a primer composition comprising an activator comprising a ferrocene moiety;
b. applying to at least one of said substrates a polymerizable composition comprising at least one polymerizable acrylate ester monomer, at least one peroxy polymerization initiator capable of polymerizing said monomer in the substantial absence of oxygen and saccharin, a saccharin derivative or a related sulfimide derivative; and
c. placing said substrates in an abutting relationship until the polymerizable composition has at least partially cured.
2. The method of claim 1 wherein the initiator is a hydroperoxide.
3. The method of claim 1 wherein the initiator is a peroxyester.
4. The method of claim 1 wherein the polymerizable acrylate ester monomer has a molecular weight of about 100 to about 30,000.
5. The method of claim 1 wherein the activator is selected from the group consisting of ferrocene, polymers incorporating ferrocene, derivatives of ferrocene, and mixtures thereof.
6. The method of claim 5 wherein the activator is ferrocene.
7. The method of claim 5 wherein the activator is a ferrocene polymer.
8. The method of claim 5 wherein the activator is present in the amount of about 0.1 to about 50 percent by weight, based upon the total weight of the composition.