Anaerobically curable compositions
View Patent ↗An anaerobically curable composition comprising an anaerobically curable component that is a combination of a solid resin component and a solid anaerobically curable monomer. A curing component for curing the anaerobically curable component is included. The composition is solid and has a melting point in the range from 30° C. to 100° C. The composition is dry to touch and can be used to form articles of manufacture such as a tape, an elongate filament, a gasket, a patch.
1. A threadlocking composition comprising:
(a) an anaerobically curable component comprising an anaerobically curable monomer and an anaerobically curable resin component, wherein the anaerobically curable monomer and the anaerobically curable resin component are each a solid, each having a melting point in the range from 30° C. to 100° C.; and
(b) an anaerobic curing component for curing the anaerobically curable component;
wherein the anaerobically curable component is present in the composition in an amount sufficient to render the composition in flowable particulate form and has a melting point in the range from 30° C. to 100° C.
2. The composition according to claim 1 wherein the composition has a melting point from 40° C. to 100° C.
3. The composition according to claim 1 wherein the composition has a melting point from 50° C. to 100° C.
4. The composition according to claim 1 wherein the composition is provided in an at least two-part form and a first part comprises the resin component and a second part comprises the anaerobically curable monomer.
5. The composition according claim 1 wherein the anaerobically curable component is provided in powder form.
6. The composition according to claim 1 wherein the resin component is provided in a flowable particulate form.
7. The composition according to claim 1 wherein the resin component is provided in powder form.
8. The composition according to claim 1 wherein the anaerobically curable monomer is provided in a flowable particulate form.
9. The composition according to claim 1 wherein the anaerobically curable monomer is provided in powder form.
10. The composition according to claim 1 wherein the anaerobically curable component includes the product formed by melting the resin component and the anaerobically curable monomer and blending them and forming a solid blended product.
11. The composition according to claim 10 wherein the composition includes the product formed by reducing the solid blended product into a flowable particulate form.
12. The composition according to claim 6 wherein the particulate form has an average particle size of less than about 500 μm.
13. The composition according to claim 1 wherein the anaerobically curable component is present in an amount of from 80% to 99% by weight of the total composition.
14. The composition according to claim 1 wherein the anaerobically curable component is present in an amount of from 93% to 97% by weight of the total composition.
15. The composition according to claim 1 wherein the anaerobically curable resin component is present in an amount of from 10% to 60% by weight based on the total weight of the composition.
16. The composition according to claim 1 wherein the anaerobically curable resin component is present in an amount of from 25% to 50% by weight based on the total weight of the composition.
17. The composition according to claim 1 wherein the anaerobically curable resin component is present in an amount of from 20% to 30% by weight based on the total weight of the composition.
18. The composition according to claim 1 wherein the anaerobically curable resin component is selected from: (meth) acrylated polyurethane resins with a molecular weight of about 2,000 g/mol or higher; novolac resins with a molecular weight of about 2,000 g/mol or higher (meth)acrylated polyester resins and combinations thereof.
19. The composition according to claim 1 wherein the anaerobically curable monomer is present in an amount of from 40% to 90% by weight based on the total weight of the composition.
20. The composition according to claim 1 wherein the anaerobically curable monomer is present in an amount of from 45% to 85% by weight based on the total weight of the composition.
21. The composition according to claim 1 wherein the anaerobically curable monomer is present in an amount from 45% to 70% by weight based on the total weight of the composition.
22. The composition according to claim 1 wherein the anaerobically curable monomer comprises at least one acrylate or methacrylate ester group.
23. The composition according to claim 1 wherein the anaerobically curable component includes at least one of: (meth)acrylated polyurethane resin with a molecular weight of less than about 1000 g/mol, (meth)acrylate monomers, including encapsulated (meth)acrylate monomers; and combinations thereof.
24. The composition according to claim 1 wherein the curing component is present in an amount of from 0.1% to 10% by weight based on the total weight of the composition.
25. The composition according to claim 1 wherein the curing component is present in an amount from 1% to 5% by weight based on the total weight of the composition.
26. The composition according to claim 1 wherein the curing component is present in an amount of about 5% by weight based on the total weight of the composition.
27. The composition according to claim 1 wherein the composition comprises less than 1% solvent by weight based on the total weight of composition.
28. The composition according to claim 27 wherein the solvent is organic solvent or water.
29. A method of providing a threadlocking composition on the threads of a threaded article to be thread locked comprising the steps of:
(i) providing in a solid tack-free form a composition according to claim 1 ;
(ii) applying the thread locking composition to the threads of an article so as to fuse it by melting to the threads.
30. The method according to claim 29 comprising the step of: heating the threads of an article to be thread locked to a temperature sufficient to melt the threadlocking composition.
31. The method according to claim 29 wherein the composition is provided in an at least two-part form and those two parts are separately applied.
32. A method of threadlocking two threaded articles together comprising:
a. providing a threadlocking composition according to claim 1 ;
b. applying the thread locking composition to the threads of at least one article so as to fuse it by melting to the threads;
c. subsequently threading the two articles together so as to initiate anaerobic cure of the threadlocking composition and thus anaerobically cure the composition so as to chemically bond the two articles together.
33. The method according to claim 32 wherein threading the two articles together is carried out after active cooling.
34. The method according to claim 32 wherein threading the two articles together is carried out after passive cooling.
35. An article to which a composition according to claim 1 has been applied.
36. The article according to claim 35 wherein the article is a bolt or nut.