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Surfactant Phase Seperation
I have a formula which combines bleach processor (hydrogen peroxide stabilizer) and degreaser.And one component of this formulation is no longer available, I have tried most things i could imagine but didnt helpFormulation is: 10% magnesium salts(chloride,sulfate( 10% chelating agents (as DTMPA, NA Gluconate, 30% nonionic surfactants (with C11-C13 5/6 EO) %5 of K55R %45 water.The mixture exhibits total phase seperation ,but the liquor becomes totally homogenous with the addition of K55R.As far as I know, this is a mixture of ethoxylated isotridecyl alcohol and sodium polyacrylate. ( maybe non neutralized polyacrylic acid?)Do you have any suggestion what this K55R might contain that prevents phase seperation in this formula?Thanks a lot
Murat -
6 Replies
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Here is FTIR result of K55-R
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Wannabee, I cannot imagine any acrylate thickener holding up to that much divalent electrolyte. I never heard of K55R, can you elaborate? Your IR scan does show a strong carbonyl stretch at 1700, so there is that to ponder: e.g. acrylate it is, or polyacrylic acid or polyester?? Yeesh, might need to call up the manufacturer on that one! Plan B may to try a nonionic alkyl modified thickener like the Natrasol line has. This needs to be peroxide stable though, right?
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chemicalmatt said:Wannabee, I cannot imagine any acrylate thickener holding up to that much divalent electrolyte. I never heard of K55R, can you elaborate? Your IR scan does show a strong carbonyl stretch at 1700, so there is that to ponder: e.g. acrylate it is, or polyacrylic acid or polyester?? Yeesh, might need to call up the manufacturer on that one! Plan B may to try a nonionic alkyl modified thickener like the Natrasol line has. This needs to be peroxide stable though, right?
Hello Matt,
Yes it needs to be peroxide stable at a pH around 11.
I guess isotridecanol with high degree of ethoxylation helps to solubilise other surfactants but its not enough, whatever is happening there to make a totally homogenous emulsion, it is the poly acrylate working the magic. Btw, viscosity of this K55R is around 2000 mpas at 25 Celcius. -
IDK but you can find a lab with GC-MS or better yet LC-MS/MS equipment to test it for you.
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Gunther said:IDK but you can find a lab with GC-MS or better yet LC-MS/MS equipment to test it for you.
I did but they asked ridiculous amounts of money…
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