Conditioning By Cationic Polymers On Asian Hair-2

Experiments
Hair samples
Undamaged and bleached Asian hair tresses from International Hair Importers & Products, Inc. were washed twice with sodium laureth sulfate prior to the experiments. The washing process was as follows: the tress was combed to rid all knots and then wet with tap water. The excess water was removed by running a thumb and forefinger along the tress. Next, 0.2 g test sample/g hair tress was applied and massaged for 30 seconds. The tress was rinsed under running tap water (35°C -40°C) at a controlled flow rate of 2 L/min and air dried. The washing process was repeated multiple times when required.

Conditioning polymers and silicones

GHPTC and a mixture of GHPTC and polyAPTAC-ACM (Trade name: N-Hance 4572, commercially available from Ashland Specialty Ingredients, a commercial unit of Ashland Inc.) were used in the experiments. Polyquaternium-10 (PQ-10), available from the market, was also used. The above three polymers were formulated into 12 conditioning shampoos with SPS dimethicone emulsion (trade name: DC 1785, 60 w/w%, particle size <1 ìm); LPS dimethicone emulsion (trade name: DC 7137, 65 w/w%, particle size >30 ìm); a 50/50 mixture of both and amodimethicone (ADM, trade name: DC 949, 35 w/w%, particle size <1 ìm). All three silicone samples were provided by Dow Corning. Other ingredients and the amount in the formula are listed in Table 1. Four samples with silicone emulsions were prepared without cationic polymers and one commercial shampoo containing GHPTC and dimethicone was used as control.


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