Posted by Crazy Horse on February 12, 2018 at 07:22:01 from (75.159.240.214):
In Reply to: Re: Zinc Additives posted by dhermesc on February 12, 2018 at 06:11:08:
I agree and I think a lot of old tractor owners get in a knot about something that is not an issue. This Wiki info says sometime in the 40's when they showed up ......
"Zinc dialkyldithiophosphates (often referred to as ZDDP) are a family of coordination compounds developed in the 1940s that feature zinc bound to the anion of a dialkyldithiophosphoric acid (e.g. ammonium diethyl dithiophosphate).[1] These uncharged compounds are not salts. They are soluble in nonpolar solvents, and the longer chain derivatives easily dissolve in mineral and synthetic oils used as lubricants. They come under CAS number 68649-42-3. In aftermarket oil additives, the percentage of ZDDP ranges approximately between 2-15%.[2] Zinc dithiophosphates have many names including ZDDP, ZnDTP, and ZDP."
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