Read the Label: Lubriderm Advanced Therapy SPF 30 Lotion

Jul 1, 2010 | Contact Author | By: Ni'Kita Wilson, Cosmetech Labs
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Title: Read the Label: Lubriderm Advanced Therapy SPF 30 Lotion
emulsifiersx ceteareth 20/cetearyl alcoholx distearyldimonium chloridex hydroxypropyl starch phosphatex avobenzonex octocrylenex
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Lubriderm Advanced Therapy SPF 30 Lotion

Keywords: emulsifiers | ceteareth 20/cetearyl alcohol | distearyldimonium chloride | hydroxypropyl starch phosphate | avobenzone | octocrylene

Abstract: This formulation uses a mix of emulsifiers that are both nonionic and cationic; cationic emulsifiers are more substantive to skin, imparting a richer feel and requiring lower levels of preservatives.

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N Wilson, Read the label—Lubriderm Advanced Therapy SPF 30 Lotion, Cosm & Toil 125(7) 19 (Jul 2010)

This formulation uses a mix of emulsifiers that are both nonionic—i.e., ceteareth 20/cetearyl alcohol blend, and cationic—i.e., distearyldimonium chloride. Cationic emulsifiers benefit the formulation since they are more substantive to skin, imparting a richer feel and requiring lower levels of preservatives. However, cationic emulsifiers can be more irritating than their nonionic and anionic counterparts, so care must be taken when formulating these emulsions.

Hydroxypropyl starch phosphate is used to help stabilize the emulsion and increase viscosity; a combination of water phase thickeners may further optimize stability, specifically at elevated temperatures. Octocrylene has triplet quenching properties that stabilize avobenzone when exposed to UV.

Additional ingredients in combination with octocrylene could better stabilize the avobenzone; one such ingredient is polyester-8, a copolymer of adipic acid and neopentyl glycol, which also has triplet quenching properties.

 

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Active Ingredients: Lubriderm Advanced Therapy SPF 30 Lotion

Active Ingredients: Lubriderm Advanced Therapy SPF 30 Lotion

Octocrylene has triplet quenching properties that stabilize avobenzone when exposed to UV.

Other Ingredients: Lubriderm Advanced Therapy SPF 30 Lotion

Other Ingredients: Lubriderm Advanced Therapy SPF 30 Lotion

Cationic emulsifiers can be more irritating than their nonionic and anionic counterparts, so care must be taken when formulating these emulsions.

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