Doesn't AMP-Acrylates/Allyl Methacrylate Copolymer work in the formula?

hey, how are you?

I am trying to make a water-based pomade for  hair and I got it  using pvp as a hair fixative. But now I would like to give a strong hold to the formula. I am using AMP-Acrylates/Allyl Methacrylate Copolymer ( Fixate G-100 by Lubrizol ) as a hair fixative but at the time of gelling a layer was formed on the surface of white colour or pink as if it were cream or something like that and I do not know what could be generating this.

I'm thinking that maybe it's a phenomenon of coalescence or an incompatibility with some material but I do not know what it can be (the AMP is anionic). 
My procedure is to first mix all of the ingredients (except ceteareth 25, water, AMP and DMDM) in a beaker, then add it to the beaker with water, then add the fixative to this beaker and bring it to 85 ° C, then bring the ceteareth-25 to 85 ° C and mix these to then dim the temperature at 60 ° C and add the DMDM then pour and bring to cooling

Any comment to solve this would be of great help; This is my formulation and I attach photos of the final product (the white layer was broken by stirring after gelling and these are small lumps that can be observed)

Ingredients                                                       %
Water                                                           42,000
Propylen glycol                                              6,000
Polysorbate 20                                               2,500
PEG-7 Glyceryl cocoate                                  5,000
Vegetable Glycerin                                         3,000
PEG-40 Hidrogenated Castor Oil                    1,500
Polysorbate 80                                               1,000
AMP-Acrylates/Allyl Methacrylate Copolymer 3,000
Ceteareth 25                                                35,000
Fragance                                                        0,500
DMDM Hydantoin                                           0,500



Thanks so much

Comments

  • Bill_TogeBill_Toge Member, Professional Chemist
    if it's only a layer on the surface, that suggests water loss by evaporation as the most likely cause; if it were an inherent incompatibility within the formula, you'd see it throughout the whole product

    one thing that baffles me is why your product is so strongly coloured - have you added a dye to it?
    UK based formulation chemist. Strongest subjects: hair styling, hair bleaches, hair dyes (oxidative and non-oxidative) I know some stuff about: EU regulations, emulsions (O/W and W/O), toothpaste, mouthwash, shampoos, other toiletries
  • @Bill_Toge Yes, I use a dye but I didn't write the percentage in the formula because the amount that I use is too small to be determined by weight

    ok, if maybe the problem is the loss of water through evaporation, how could this be solved? increasing the percentage of humectants?
  • Chemist77Chemist77 Member, PCF student
    I have found ceteareth-20 @30% levels working great in such formulation, ceteareth-25 was a pain to work with. Though I never used so many solubilizers there, propylene glycol and glycerin worked fine @ combined level of 10-15%. 
  • @Chemist77

    What's the problem with Ceteareth-25?
  • Chemist77Chemist77 Member, PCF student
    Ah a little drop in temperature and it’s all lumped out. Not that I discourage it but I felt 20 ethoxylate worked out better and I never had to use solubilizers as well. Just 2.5% Polysorbate 20 did the job for me.
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