I want to know the chemical structure of Alkyd resin and how the fatty acid is attached with the alkyd resin.
Is it cross linking?
Attached is the structure of Alkyd resin (also called Glyptal resin) which results from condensation polymerization of phthalic anhydride with glycerol. Of course, the 5-membered ring opens up for the reaction & hence there will be acid versus alcohol reaction which gives ester linkages. In case a fatty acid is to be attached to it, then it will bond with the hydroxyl groups of glycerol. The structure of the alkyd resin is 3-dimensional network & when the fatty acid reacts with the resin it will have the same structure but more complicated with possible cross-linking .
How did the stearic acid get bonding with the Alkyd resin?
I added the Stearic acid coated CaCO3 nanoprticles apart to Alkyd resin.. Its clearly binded with resin. So I need to know how its happend.? Could anyone know whats going on in it?
In the formation of the alkyd resin & when a slight excess of glycerol is used, some hydroxyl groups of glycerol (one or two) remain unreacted. So these will form glycerol monostearate or glycerol distearate adding more complexity to the original alkyde structure. To illustrate, I am showing, in the attached file, the full reaction of stearic acid with glycerol but actually what happens is part of it unless there are unreacted glycerol molecules.
Hello everyone, right now i´m working with alkyd resins and i have to face a new challenge! I have to develop a Alkyd that dissolves in ethanol. So i had made some research regarding to this issue, but I didn´t found useful information! Can anyone help-me?
Regardind to the topic I have the same idea than Nizar, but don´t forget that you can produce Alkyd Resin by at least two different metods. The choose of the metod will depend if you are using vegetable oil or Fatty Acid!
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