I'm having a little trouble finding what exactly "peanut butter" is made of. Could someone please tell me.
Okay this question does come up from time to time. And here is just one recipe for peanut butter.
First thing is to get as fresh peanuts as you can find. And then roast them for about 1/2 hour at 275 degrees.....oh...wait...this is not what you were asking about. :facepalm:
Okay seriously now. Peanut butter is a name we use on here to talk about polyester, MEKP and Cabosil mixture. And that is because most mix their peanut butter to the consistency to a peanut butter thickness.
I use about the same amounts of Polyester 435 laminating resin to equal amounts of Cabosil. Then I mix those up well and if the mixture is too runny yet, I add in more Cabosil. If it is too thick, I add in more polyester resin. When you get the right consistency you want, then mix in the MEKP. The amount of MEKP can be adjusted as well, but a good start is a 1% to 2 % mixture of MEKP. But then you have to mix it well. I usually mix for a true two minutes myself (watching a wall clock in my shop) and never had any issues.
If you are mixing 500ml of polyester for peanut butter;
500 ml of polyester
500 ml of Cabosil (fumed silica)
5 to 10 ml of MEKP
Mix well and use.
Just remember there is no set mixture and you can adjust the ingredients to suit your application. Just make sure you get at least a 1% to 2% MEKP so it will harden and cure. The higher teh MEKP percentages, the quicker it cures. But your open work time decreases as well.
