Sodium carbomer is a pre-neutralized form of carbomer, a synthetic polymer used as a thickener and film-forming agent in skincare products. It is known for its easy handling, faster dispersion, and ability to provide lighter and fresher gel textures compared to conventional carbomers.
1. Easy handling and faster dispersion: Sodium carbomer's spherical particles flow more easily, making it easier to incorporate into formulations and reducing process time. 2. Lighter and fresher gel textures: Sodium carbomer imparts a lighter and smoother feel to gels due to its spherical particles and lower yield stress and strain. 3. Reduced pilling: Sodium carbomer reduces the deposition of the polymer or pilling that occurs when a product is rubbed onto the skin.
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Avoid high amounts of acid as it can negatively affect viscosity.
Sodium carbomer is a synthetic polymer.
Safe as used in cosmetics
Low concern
1. Sodium carbomer does not require any pre-dispersion as it thickens the formulation as soon as it is sprinkled into the water or a water/oil blend, giving a clear gel. 2. Sodium carbomer is suitable for use between pH 5 and 10, wherein its carboxylic acids are neutralized to carboxylates. 3. The viscosity of sodium carbomer gels increases with increasing concentration, and it exhibits shear-thinning behavior, making it easier to apply to the skin. 4. Sodium carbomer is commonly used in skincare products such as gels, creams, and lotions to provide a smooth and spreadable texture. 5. Polyacrylic acid is a weak anionic polyelectrolyte, whose degree of ionisation is dependent on solution pH. In its non-ionised form at low pHs, PAA may associate with various non-ionic polymers (such as polyethylene oxide, poly-N-vinyl pyrrolidone, polyacrylamide, and some cellulose ethers) and form hydrogen-bonded interpolymer complexes. 6. In aqueous solutions PAA can also form polycomplexes with oppositely charged polymers such as chitosan, surfactants, and drug molecules (for example, streptomycin). 7. The neutralized polyacrylic acid gels are suitable biocompatible matrices for medical applications such as gels for skin care products. 8. PAA films can be deposited on orthopaedic implants to protect them from corrosion. Crosslinked hydrogels of PAA and gelatin have also been used as medical glue. 9. Other applications involve paints and cosmetics. They stabilize suspended solid in liquids, prevent emulsions from separating, and control the consistency in flow of cosmetics. Carbomer codes (910, 934, 940, 941, and 934P) are an indication of molecular weight and the specific components of the polymer. For many applications PAAs are used in form of alkali metal or ammonium salts, e.g. sodium polyacrylate. 10. Hydrogels derived from PAA have attracted much study for use as bandages and aids for wound healing.
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