Hi!!! I've foung the following product from Kemira: Colloid 148. This product have a performance like polyacrylates but it is manufactured from other kind of material cheapest than acrylic acid. Could someone tell me more about this new raw material?? Thanks
Interesting question. This site discusses the 148 some:
(Poly vinyl alcohol is made by hydolysis of polyvinyl acetate since vinyl alcohol does not exist as a monomer - it undergoes an enol rearrangement to form formaldehyde.)
Maybe they are taking a polyacrylate and hydrolyzing it to the acid? You could try calling Kemira and see if they will tell you a little bit more.
John Aspen Research, -
Opinions expressed herein are my own and may not represent those of my employer.
A guess would be that it contains a polymerizable acid (with a double bond), such as maleic, instead of acrylic.
But would you expect maleic acid to be cheaper than acrylic?
John Aspen Research, -
Opinions expressed herein are my own and may not represent those of my employer.
But maleic acid doesn't polymerize with itself at acrylic acid conditions
acetaldehyde.
H2C=CHOH -> H3C-CHO
H O - H H O \ / | // C = C - > H - C - C / \ | \ H H H H
"vinyl alcohol" acetaldehyde
I googled and found quite a few other people who think the product is formaldehyde. I wonder where that idea came from?
By the way, using "enol rearrangement" as a term will make you appear as a rookie. Strictly speaking there is no such thing as an "enol rearrangment". "Keto-enol rearrangement" is the preferred term, even though acetaldehyde is not a ketone - the aldehydes can be considered as a subgroup of the ketones for this purpose, as both have C=O bonds. (Relax, ALL of us were rookies at one point in time!)
:)
Arrrgh! Caught again. At least I'm in good company. Linus Pauling can't say that he was always real careful with this rearrangement either.
Maybe the missing carbon is the unidentified sink in the global carbon cycle?
John Aspen Research, -
Opinions expressed herein are my own and may not represent those of my employer.
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