Quote:
Originally Posted by sailorboy1
The paint people spend time and research to make their paints. If these "things" people add to it later really helped don't you think the manufacturers would already know about it. Plus the active ingredient that is in these user additives might already be in the paint (anyone know the chemical name for red pepper?).
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The main
family of "hot" chemicals found in the chili peppers is well known. It's the capsaicinoid
family. Typified by capsaicin. And the chemical name for that is well known: 8-methyl-N-vanillyl-6-nonenamide. You can read it about it here:
https://en.wikipedia.org/wiki/Capsaicin
And for sure capsaicin is different from ivermectin, the active agent in dewormers such as horse dewormer. You can read about ivermectin here:
https://en.wikipedia.org/wiki/Ivermectin
Ivermectin is made to fit into the avermectin family of chemicals. First discovered by humans back in the 1970s, found as a chemical created by certain bacteria that use avermectins as part of the bacteria's chemical warfare strategy against things that try to kill it. Just like many of the antibiotics are used by bacteria and fungi to kill things that are trying to eat them.
So why might ivermectin be important and part of your future (aside from the
current off-label uses it has to stop acne rosaceae and work to see if avermectins have anti-virus functions and might even have a role in controlling non-alcoholic fatty liver disease)?
Ivermectin works right well against certain invertebrates, including several types of parasitic worms, mites, and some insects.
We know that fouling on hulls in the sea starts with bacteria growing as a slime layer. That seems to prepare the ways for wide range of other organisms, including certain worms and crustaceans (e.g. barnacles).
See anything relevant? Ivermectin works against certain worms and several groups of arthropods (the big group of jointed legged
animals that includes mites, ticks, spider, insects, and crustaceans).
Fancy that!
So my guess is that a veterinary physician who also boats saw the connection. And tried it out.
And probably the boffins in the chemical companies that make antifouling have not thought of ivermectin yet. Or been given the
funding to run experiments.
Sounds just like the big pharmaceutical companies and
medical researchers that are discovering new off-label uses for ivermectin, right?
As you correctly note, horse dewormer is not necessarily compatible with the chemistry of any particular antifouling. Adding anything to a complex coating such as an ablative antifouling has to have some threshold - over that threshold the paint for which you paid is just going to fall apart.
And even if ivermectin has some antifouling effect doesn't mean that whatever other agents in horse dewormer provide an optimum
delivery medium for any antifouling function that ivermectin might have. And without environmental impact tests, no one knows what ivermectin might do in the
marine environment.
So I'd vote against adding horse dewormer for now. But who knows if ivermectin might be in antifouling once day.