Chapter 3 107 conditioning properties, especially to mitigate the effects of extreme processing that are experienced during hair-straightening. Cationic polymeric conditioners can improve wet combability and ameliorate electrostatic charging of the hair (manifested by flyaway). Many cationic polymers have been developed for the purpose of conferring conditioning properties on hair. In fact, there are now more than one hundred polyquaternium ingredients listed in the INCI dictionary and this list is still expanding. The primary purpose of polyquaternium polymers is to confer good conditioning benefits. A non-exhaustive list of conditioning polymers is shown in Table 1. Table 1. Examples of Cationic Conditioning Polymers Chitosan Cocodimonium Hydroxypropyl Hydrolyzed Collagen Cocodimonium Hydroxypropyl Hydrolyzed Hair Keratin Cocodimonium Hydroxypropyl Hydrolyzed Keratin Cocodimonium Hydroxypropyl Hydrolyzed Wheat Protein Cocodimonium Hydroxypropyl Oxyethyl Cellulose Steardimonium Hydroxyethyl Cellulose Stearyldimonium Hydroxypropyl Hydrolyzed Oxyethyl Cellulose Guar Hydroxypropyltrimonium Chloride Starch Hydroxypropyltrimonium Chloride Lauryldimonium Hydroxypropyl Hydrolyzed Collagen Lauryldimonium Hydroxypropyl Hydrolyzed Wheat protein Stearyldimonium Hydroxypropyl Hydrolyzed Wheat Protein Polyquaternium-4 Polyquaternium-10 Cationic hydroxyethylcellulose Polyquaternium-24 Hydrophobically modified cationic hydroxyethylcellulose Poly(methacryloxyethyltrimethylammonium methosulfate) Poly(N-methylvinylpyridinium chloride) Onamer M (Polyquaternium-1), PEI-1500 (Poly(ethylenimine) Polyquaternium-2