Visually Indicating Wipe Efficacy and Other Topics: Literature Findings

By: Charles Fox, Independent Consultant

Posted: December 30, 2009, from the January 2010 issue of Cosmetics & Toiletries.

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Treating dry hair: Lion Corp. has disclosed hair preparations that impart moisturized texture to hair and treat hair damage such as breakage or split ends with silicone-modified clay minerals, polyethylene glycol and cationic surfactants.¹² The disclosed preparations comprised silicone-modified clay minerals, 50–98% polyethylene glycol of molecular weight 200–600, cationic surfactants, C14-32 alcohols and optional polyether-modified silicones.

Specifically, bentonite^f was treated with dimethylpolysiloxane^g under stirring at RT for 1,202 min to create a silicone-modified clay mineral. A composition containing the modified clay mineral, polyethylene glycol, behenyltrimethylammonium chloride^h, polyether-silicone^j, stearyl alcohol, hydroxypropylcellulose and water was stored at 50°C for 90 days and showed no separation or creaming. The composition imparted moisturize to hair and prevented breakage and split ends when tested by repeated brushing.

Pre-coloring hair treatment: Ikeda Bussan Co., Ltd. has been issued a patent on pre-coloring hair treatment agents containing emulsified products of liquid higher alcohols.¹³ When applied prior to the application of oxidative hair dyes, the compositions prevent stickiness and non-uniformity in dyeing. The pretreatment was comprised of a mixture of hydrolyzed jojoba esters and waterk, EDTA trisodium salt, and water and was used to coat a white wool fabric. The fabric was then treated with an oxidative hair dye composition. According to the company, dyeability, dyeing uniformity and the texture of the dyed fabric were improved.

Sunscreens
Enhancing avobenzone stability: Schering-Plough Healthcare Products Inc. has patented phosphate-based emulsifiers to enhance the photostability of avobenzone in the presence of zinc oxide.¹⁴ The photostability of avobenzone after UV exposure was tested in three emulsions also containing zinc oxide. The test formulas differed from one another only in the type of emulsifier used. The addition of phosphate-based emulsifiers^m,n was found to significantly improve the photostability of avobenzone in emulsions, in comparison with a traditional nonionic emulsifierp using potassium cetyl phosphate (and) hydrogenated palm glycerides. The phosphate-based emulsifiers also maintained avobenzone’s protective power against long exposures to UV radiation.

Makeup
Anhydrous color composition: L’Oréal has disclosed anhydrous makeup or lip care compositions comprising macadamia oil and a wax.¹⁵ The composition contains at least one fatty phase of at least 0.5% w/w of macadamia oil or one of its derivatives, and at least one natural wax. The composition of a lipstick is shown in Formula 2.