Stabilization of triphenylboron-pyridine
A method for stabilizing triphenylboron-pyridine (TPBP) in a solvent-based anti-fouling coating, such as a marine anti-fouling coating, by adding to the coating about 0.04 to about 0.40% wt., based on the total amount of the triphenylboron-pyridine, of 2,2,6,6-tetramethylpiperidinyl-1-oxy-radical (“TEMPO”). Also disclosed is a solvent-based anti-fouling coating, such as a marine anti-fouling coating, composition containing TPBP and TEMPO.
1. A method for the stabilization of triphenylboron-pyridine in a solvent-based anti-fouling coating which comprises adding to the coating from about 0.04 weight percent to about 0.40% wt., based on the total amount of the triphenylboron-pyridine, of a sterically hindered nitroxyl radical of formula 1
wherein each R is a methyl group.
2. A method of claim 1 , wherein from about 0.04 to about 0.35% wt., based on the total amount of the triphenylboron-pyridine, of the sterically hindered nitroxyl radical of formula 1, is added to the coating.
3. A method of claim 1 , wherein from about 0.04 to about 0.30% wt., based on the total amount of the triphenylboron-pyridine, of the sterically hindered nitroxyl radical of formula 1, is added to the coating.
4. A method of claim 1 , wherein from about 0.04 to about 0.20% wt., based on the total amount of the triphenylboron-pyridine, of the sterically hindered nitroxyl radical of formula 1, is added to the coating.
5. A method of claim 1 , wherein about 0.1% wt., based on the total amount of the triphenylboron-pyridine, of the sterically hindered nitroxyl radical of formula 1, is added to the coating.
6. A method of claim 1 wherein the coating comprises about 0.1 to about 60% wt. of the triphenylboron-pyridine.
7. A method of claim 1 , wherein the coating comprises about 1 to about 40% wt. of the triphenylboron-pyridine.
8. A method of claim 1 , wherein the coating comprises about 3 to about 10% wt. of the triphenylboron-pyridine
9. A method of claim 1 , wherein the coating comprises about 10% wt. of the triphenylboron-pyridine.
10. A method of claim 1 , wherein the coating is a solvent-based marine anti-fouling coating.
11. A solvent-based anti-fouling coating composition comprising triphenylboron-pyridine and about 0.04 wt % percent to about 0.40% wt., based on the total amount of the triphenylboron-pyridine, of a sterically hindered nitroxyl radical of formula 1
wherein each R is a methyl group.
12. A coating composition of claim 11 , which is stored in a container.
13. A coating composition of claim 12 , wherein the head space in the container comprises not more than about 0.1% by volume of benzene.
14. A coating composition of claims 11 , which comprises from about 0.04 to about 0.35% wt., based on the total amount of the triphenylboron-pyridine, of the sterically hindered nitroxyl radical of formula 1.
15. A coating composition of claim 11 , which comprises from about 0.04 to about 0.30% wt., based on the total amount of the triphenylboron-pyridine, of the sterically hindered nitroxyl radical of formula 1.
16. A coating composition of claim 11 , which comprises from about 0.04 to about 0.20% wt., based on the total amount of the triphenylboron-pyridine, of the sterically hindered nitroxyl radical of formula 1.
17. A coating composition of claims 11 , which comprises about 0.1% wt., based on the total amount of the triphenylboron-pyridine, of the sterically hindered nitroxyl radical of formula 1.
18. A coating composition of claim 11 which comprises about 0.1 to about 60% wt. of the triphenylboron-pyridine.
19. A coating composition of claim 11 which comprises about 1 to about 40% wt. of the triphenylboron-pyridine.
20. A coating composition of claim 11 which comprises about 3 to about 10% wt. of the triphenylboron-pyridine
21. A coating composition of claim 11 which comprises about 10% wt. of the triphenylboron-pyridine.
22. A coating composition of claim 11 , wherein the coating composition is a solvent-based marine anti-fouling coating.