pH Adjustment of Acrylates/Hydroxyesters Acrylates Copolymer

I received a new fixative to sample for a hair grooming product I am developing.
If anyone is familiar with Acrylates/Hydroxyesters Acrylates Copolymer I could use some assistance on adjusting to the correct pH for proper neautralization. The literature states 60-80%  neutralization would be ideal for the curl retention/humidity resistance I am looking for and 1-2% solids for use level.

It is supplied as a white acrylic and upon neutralization, will turn clear. Now, either my pH test strips are inaccurate as the pH is showing roughly 9 on the scale upon it turning clear.

Never having worked with this particular copolymer, is it normal to get such a high pH reading in order for neutralization/clear formulation to occure?

Now if I was to adjust the pH of final formulation back closer to 7 would this copolymer return to a milky consistancy as I am hoping to get the final formulation closer to neutral.

Using Triethanolamine to neutralize.


  • What test strips are you using? I have only found one that is reasonably accurate - the four-pad type. I use them when I am doing development for rough pH measurements, for speed and convenience. They are reasonably accurate. Most pH strips are almost useless.
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  • Thanks, Belassi. I have a pH meter, but I am out of calibration solution. So I was using test trips as you stated for rough measurements. I will have to order some camlab and solution. Figured my strips were most likely inaccurate as I never tested against my meter.
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