Method of applying silane coating to metal composition
View Patent ↗Organofunctional silanes are applied to metal surfaces using an oil bath. Metal is immersed in an oil bath containing approximately 2% silane. In a preferred embodiment, the metal is a tire cord. The silane can either be hydrolyzed or unhydrolyzed. The hydrolyzed silanes can be in combination with a water dispersible resin. When the tire cord is coated with silane using the present method, it allows a tire to be formulated with lower sulfur levels and without cobalt.
1. A method of applying a silane coating onto a metal tire cord comprising passing said metal tire cord through a bath containing an oil mixture, said oil mixture comprising a blend of oil and an organofunctional silane wherein said oil comprises at least about 80% by weight of said bath.
2. The method claimed in claim 1 wherein said metal tire cord is drawn through said bath.
3. The method claimed in claim 2 wherein said organofunctional silane is dispersed in a resin.
4. The method claimed in claim 2 wherein said metal tire cord is maintained in said bath for a period of at least about 1 second.
5. The method claimed in claim 1 wherein said silane includes an amino silane.
6. The method claimed in claim 1 wherein said organofunctional silane comprises at least about 2% by weight of said oil bath.
7. The method claimed in claim 1 wherein said organofunctional silane is a mixture amino silane and polysulfur silane.
8. The method claimed in claim 7 wherein said organofunctional silane mixture has a ratio by weight of amino silane:polysulfur silane of 1:3 to 3:1.
9. The method claimed in claim 1 wherein said organofunctional silane is unhydrolyzed.
10. The method claimed in claim 1 wherein said organofunctional silane is hydrolyzed and said solution further includes water.
11. The method claimed in claim 1 wherein said oil is a naphthenic lubricating oil.
12. The method claimed in claim 1 wherein said oil is a paraffinic lubricating oil.
13. The method claimed in claim 1 wherein said metal tire cord is cleaned with an alkaline cleaner before said silane is applied.