Having worked as a formulating chemist for two fortune 500 paint companies and many years managing finishing operations for companies, two of which supplied components to Deere & CO, I’ll share what I know about the Ag Green & Yellow supplied by Valspar.
The last time I was in a Deere plant was in ‘97 (Des Moines Works) where this same alkyd was applied to small parts such as latches, pins, brackets, etc. Application was via dip tanks followed by touch up with conventional air spray guns and force dried in a convection oven @ 180F. Quite the contrast to what was done on the other side of the complex where entire cotton picker shells were being electrocoated in a cathodic acrylic e-coat tank the size of a swimming pool.
The Ag Yellow and Green, whether bought from Deere or Case/IH dealers are the same animal, a low end soya alkyd product . It does not contain an acrylic copolymer, whereas the better performing Case/IH “Gloss Red “ does. It has one distinct advantage, when applied over a less than perfect oil free / smut free surface, it will have greater adhesion properties than acrylic modified alkyds, acrylics, urethanes, polyesters and so forth. This class of medium to long chain alkyds will “wet out” over oil and smut laden surfaces where the other’s cannot due to surface tension and chemically reactive incompatibilities. The use of hardeners is apparently a moot point as there is really nothing for the isocyanate to react with that will result in a perceivable difference.
Currently I operate a modest shop and have had quite a few Deere tractors in the past year. We have used the Deere Green & Yellow from both Deere and Case/IH only to find them alike. We no longer use either due to quality and productivity concerns. In their place we use an industrial catalyzed urethane topcoat applied over a mil spec epoxy primer. The gloss retention is equivalent to the automotive version for half the cost.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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