Cure accelerators for anaerobic curable compositions

1. An anaerobic curable composition, comprising:

(a) a (meth)acrylate component;

(b) an anaerobic cure-inducing composition substantially free of saccharin; and

(c) an anaerobic cure accelerator compound within structure I

wherein Y is an aromatic ring, optionally substituted at up to five positions by C 1-6 alkyl or alkoxy, or halo groups; A is C═O, S═O or O═S═O; X is NH, O or S and Z is an aromatic ring, optionally substituted at up to five positions by C 1-6 alkyl or alkoxy, or halo groups, or Y and Z taken together may join to taken together may join to the same aromatic ring or aromatic ring system, provided that when X is NH, o-benzoic sulfimide is excluded from structure I.

2. The composition according to claim 1 , wherein the (meth)acrylate component is represented by H 2 C═CGCO 2 R 1 , wherein G is a member selected from the group consisting of H, halogen and alkyl having from 1 to about four carbon atoms, and R 1 is a member selected from the group consisting of alkyl, cycloalkyl, aklenyl, cycloalkenyl, alkaryl, and aryl groups having from 1 to about 16 carbon atoms, with or without substitution or interruption by a member selected from the group consisting of silane, silicon, oxygen, halogen, carbonyl, hydroxyl, ester, carboxylic acid, urea, urethane, carbamate, amine, amide, sulfur, sulonate and sulfone.

3. The composition according to claim 1 , wherein the (meth)acrylate component is a member selected from the group consisting of silicone (meth)acrylates, polyethylene glycol di(meth)acrylates, bisphenol-A-(meth)acrylates, ethoxylated bisphenol-A-(meth)acrylates, bisphenol-F-(meth)acrylates, ethoxylated bisphenol-F-(meth)acrylates, tetrahydrofuran (meth)acrylates and di(meth)acrylates, hydroxypropyl (meth)acrylate, hexanediol di(meth)acrylate, and trimethylol propane tri(meth)acrylate.

4. The composition according to claim 1 , wherein the anaerobic cure accelerator is a member selected from the group consisting of

.

5. The composition according to claim 1 , wherein the accelerator is a member selected from the group consisting of

6. The composition according to claim 1 , further comprising a peroxide compound.

7. Reaction products of the composition according to claim 1 .

8. A process for preparing a reaction product from an anaerobic curable composition, comprising the steps of:

apply an anaerobic curable composition according to claim 1 , to a desired substrate surface and

exposing the composition to an anaerobic environment for a time sufficient to cure the composition.

9. A method of preparing an anaerobic curable composition, comprising the step of:

mixing together:

a (meth)acrylate component,

an anaerobic cure inducing composition substantially free of saccharin and

an anaerobic cure accelerator compound in accordance with claim 1 .

10. The composition according to claim 1 , wherein the anaerobic cure-inducing composition comprises the combination of a free radical initiator and a free radical co-accelerator.

11. A method of using an anaerobic cure accelerator compound in accordance with claim 1 , comprising either:

(I) mixing the anaerobic cure accelerator compound in an anaerobic curable composition; or

(II) applying onto a surface of a substrate the anaerobic cure accelerator compound and applying thereover an anaerobic curable composition.

12. An anaerobic curable composition, consisting essentially of:

(a) a (meth)acrylate component;

(b) an anaerobic cure-inducing composition; and

(c) an anaerobic cure accelerator compound in accordance with claim 1 ; and

(d) optionally, one or more additives selected from the group consisting of free radical initiators, free radical co-accelerators, free radical inhibitors, metal catalysts, thickneners, non-reactive plasticizers, fillers, and toughening agents.

13. A bond formed between two mated substrates with the composition of claim 1 .