|What is it?||Ammonium Acryloyldimethyltaurate/VP Copolymer (Aristoflex® AVC) is a gelling agent and oil-in-water pseudo-emulsifier (according to the manufacturer it can stabilize up to 15% hydrophobic ingredients). It can be used to quickly create lightweight gel-creams. It is a synthetic polymer. Unlike some other gelling agents, it is pre-neutralized and does not need to be pH adjusted.
Clariant (the manufacturer) productes an entire line of Aristoflex® products; the “AVC” distinction is important! The AVC variety is marketed as the most versatile of the line.
|INCI||Ammonium Acryloyldimethyltaurate/VP Copolymer|
|Appearance||Fine white powder|
|Texture||Creates silky smooth gels.|
|pH||4–6 (1% in distilled water)|
|Why do we use it in formulations?||I primarily use it to create lightweight gels with small amounts of pseudo-emulsified oils.
It can also be used as a co-thickener/emulsion stabilizer in products containing other primary emulsifying/thickening ingredients, and to gel concoctions that contain high concentrations (upwards of 50%) of ethanol.
|Do you need it?||No, but it is wonderfully fun and very useful for certain types of projects.|
|Refined or unrefined?||Ammonium Acryloyldimethyltaurate/VP Copolymer (Aristoflex® AVC) only exists as a refined product.|
|Strengths||Ammonium Acryloyldimethyltaurate/VP Copolymer (Aristoflex® AVC) quickly creates beautiful gels. It can also create “pseduo-emulsions” by stabilizing non-water-soluble ingredients (oils, silicones) into an otherwise aqueous formula. Clariant (the manufacturer) says “the stabilizing effect of Aristoflex® AVC is explained by the cross-linked structure of the polymer, providing a yield value and thus ‘trapping’ the oil droplets or solids (e.g. pigments) in the water/polymer matrix.”|
|Weaknesses||Ammonium Acryloyldimethyltaurate/VP Copolymer (Aristoflex® AVC) does not play well with electrolytes—you’ll notice an immediate loss of viscosity as soon as electrolytes are added. Avoid ingredients including electrolytes like aloe vera, sodium lactate, salt, and urea. If your end product is significantly thinner than expected, double-check the ingredients for anything containing electrolytes.|
|Alternatives & Substitutions||At this time I can’t suggest anything terribly suitable. You could try using a different gelling agent like hydroxyethylcellulose for the gelling job, and then incorporating a solubilizer like Cromollient SCE for the emulsifying/stabilizing part. This sort of two-part alternative will require you to at least partially re-develop and re-test the formula.|
|How to Work with It||Ammonium Acryloyldimethyltaurate/VP Copolymer (Aristoflex® AVC) can be hot or cold processed. It can be pre-dispersed in the oil phase (as you would a gum) before blending in the water phase with a high shear mixer. I’ve also had good results mixing together all the other ingredients in the recipe before sprinkling the Aristoflex® AVC over the surface of the mixture and blending that together with a high shear mixer.
Keep the pH of the final product in the 4–9 range. A pH above 9 will release ammonia.
|Storage & Shelf Life||Stored somewhere cool, dark, and dry, Aristoflex® AVC should last up to three years.|
|Tips, Tricks, and Quirks||For clear gels, use at least 1% Aristoflex® AVC, or include ~5% glycerin or other solvent. Distilled or de-ionized water will give the best results.|
|Recommended starter amount||30g/1 ounce|
|Where to Buy it||Buy it from an online DIY ingredient supplier. So far I’ve found it at Windy Point Soap Making Supplies (Canada) and LotionCrafter (USA).|