Cure accelerators for anaerobic curable compositions
View Patent ↗The present invention relates to new cure accelerators for anaerobic curable compositions. These anaerobic cure accelerators are generally sulfonimide derivatives and sulfonamide derivatives.
1. An anaerobic curable composition, comprising:
(a) a (meth)acrylate component; and
(b) an anaerobic cure-inducing composition comprising an anaerobic cure accelerator compound within structure I
wherein R and R 1 may or may not be present, but when at least one is present it is ═O; X is N or S; and R 2 is hydroxyl or alkoxy.
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, alkenyl, 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, sulfonate 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 in the anaerobic cure accelerator R and R 1 are each ═O and R 2 is hydroxyl or an alkoxy.
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. 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 .
8. 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.
9. 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, thickeners, non-reactive plasticizers, fillers, and toughening agents.