Synthalen® W400 10 ml

Testing New Gel Formulas With a Small Batch of Acrylic Thickener

Synthalen® W400 is an acrylic acid based polymer used as a gelling agent and structure stabilizer across a wide range of water-based systems. The compact 10 ml size is a practical choice for formulators who want to test a new recipe or run laboratory trials before committing to larger production volumes. This product belongs to the category of Gelling Agents and Thickeners, which brings together materials for building clear gels, stable emulsions and viscous aqueous formulations. The strongest global demand for this type of polymer comes from personal care manufacturing - shower gels, styling gels, gel creams - along with pharmaceutical gel bases and certain technical formulations in household chemistry.

The thickening mechanism relies on neutralization: once an alkaline agent is added, the polymer chains unfold and form a three-dimensional network that traps water and builds viscosity. The powder is first dispersed into cool or slightly warm water under gentle, steady mixing, avoiding sudden temperature changes and vigorous whipping that could trap air bubbles inside the finished gel. After the polymer has fully hydrated, a neutralizer such as triethanolamine or sodium hydroxide is introduced gradually, and the mixture thickens almost instantly. It is best to add the neutralizer in small increments while watching the texture develop, since an excess can actually cause the viscosity to drop rather than increase.

Typical usage levels range from 0.2 to 1 percent of the total formula weight, depending on the desired thickness and end product. Lighter gels require only a small amount, while dense, glass-clear gels call for the upper end of the range. The polymer blends well with surfactants, glycerin, alcohols and water-soluble extracts, though it is sensitive to high electrolyte and salt concentrations, which can reduce final viscosity. For this reason, salts and mineral-rich active ingredients should be added only after the base gel has fully thickened.

When comparing thickening options, it helps to know how each material behaves: this acrylic polymer produces a classic clear, elastic gel, whereas Worlee Aqua Thix 150 25 g delivers a different rheology and is often chosen for stabilizing pigmented systems in color cosmetics. A natural alternative comes from Carrageenan 25 g, extracted from seaweed and widely used in food production as well as in naturally positioned cosmetic lines. For formulators who prefer to skip the neutralization step entirely, Polygel CA 20 g offers a simpler process with less risk of pH-related mistakes.

Store the polymer in a tightly sealed container, in a dry place at room temperature, away from moisture and direct sunlight, since exposure can affect how quickly it hydrates during future use. The small 10 ml size is particularly suited to formulators just beginning to work with acrylic thickeners who want to master neutralization technique before scaling up.

Clear Soothing Gel for Sensitive Skin

Distilled water 94 ml

Synthalen® W400 0.5 ml

Sodium hydroxide 10 percent solution 0.4 ml

Aloe vera extract 3 ml

Glycerin 2 ml

Allantoin 0.5 g

Disperse the polymer slowly into room-temperature water and allow it to hydrate undisturbed for about 10 minutes. Mix gently until smooth, then add the neutralizer in small increments while observing the gel form. Once the desired clarity and thickness are reached, blend in the aloe extract, glycerin and allantoin, stir until uniform, and transfer into a clean container.