Viscosity Stability Issue in Shower Cream with Shea Butter Water
Question
I used [url=http://www.myskinrecipes.com/shop/%E0%B8%99%E0%B9%89%E0%B8%B3%E0%B8%AA%E0%B8%81%E0%B8%B1%E0%B8%94%E0%B8%98%E0%B8%A3%E0%B8%A3%E0%B8%A1%E0%B8%8A%E0%B8%B2%E0%B8%95%E0%B8%B4/737-shea-butter-water-soluble.html:3bfoa69y]shea butter water[/url:3bfoa69y] in a shower cream formulation. Previously, I used Lipex Shea [url=http://www.myskinrecipes.com/shop/%E0%B8%A1%E0%B8%AD%E0%B8%A2%E0%B8%8ซ์%E0%B9%80%E0%B8%8จ%E0%B8%AD%E0%B8%A3%E0%B9%8์/164-betaine-trimethylglycine-%E0%B8%9A%E0%B8%B5%E0%B9%80%E0%B8%97%E0%B8%99.html:3bfoa69y]Betaine[/url:3bfoa69y]. When I first mixed it, the cream was thick, but after 2-3 days, it became liquid. 1. I want to know if the structure of the [url=http://www.myskinrecipes.com/shop/%E0%B8%99%E0%B9%89%E0%B8%B3%E0%B8%AA%E0%B8%81%E0%B8%B1%E0%B8%94%E0%B8%98%E0%B8%A3%E0%B8%A3%E0%B8%A1%E0%B8%8ช%E0%B8%B2%E0%B8%95%E0%B8%B4/737-shea-butter-water-soluble.html:3bfoa69y]shea butter water[/url:3bfoa69y] from myskin is [url=http://www.myskinrecipes.com/shop/%E0%B8%A1%E0%B8%AD%E0%B8%A2%E0%B8%8ซ์%E0%B9%80%E0%B8%8จ%E0%B8%AD%E0%B8%A3%E0%B9%8์/164-betaine-trimethylglycine-%E0%B8%9A%E0%B8%B5%E0%B9%80%E0%B8%97%E0%B8%99.html:3bfoa69y]Betaine[/url:3bfoa69y] or what structure it has. 2. I would like advice on how to fix this issue so the cream remains thick and stable.
Answer
Shea Butter Water vs. Betaine and Viscosity Issues
Regarding your questions about using Shea Butter Water in your shower cream formulation:
Structure of Shea Butter Water: The Shea Butter Water product from MySkinRecipes has the INCI name PEG 50 Shea butter. This is a water-soluble derivative of Shea butter. It is chemically different from Betaine (Trimethylglycine), which is the structure of the Betaine product you mentioned.
Stabilizing Viscosity: The issue of your shower cream becoming liquid after a few days when using Shea Butter Water, compared to when you used Lipex Shea Betaine, is likely due to incompatibility between the Shea Butter Water (PEG 50 Shea butter) and the thickening agent you are currently using in your shower cream base. Different ingredients, even if water-soluble, can interact differently with thickeners.
To resolve this, you should consider trying alternative thickening agents that are known to provide stable viscosity in surfactant systems containing ingredients like PEG 50 Shea butter. Some types of thickeners that might offer better stability include:
- Acrylates copolymers
- Certain non-ionic thickeners
Experimenting with different thickeners or combinations of thickeners should help you achieve a stable viscosity for your shower cream formulation.
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