New high-charge density hydrophobically modified cationic HEC polymers for improved co-deposition of benefit agents and serious conditioning for problem hair

摘要

A series of new high charge density Polyquaternium-67~1 (PQ-67) polymers have been prepared and evaluated in shampoo formulations. These new compositions represent an addition to the family of high-viscosity quaternized hydroxyethylcellulose (HEC) polymers with cationic substitution of trimethyl ammonium and dimethyldodecyl ammonium~2 (Figure 1A) described in (1) and (2). The evaluation protocol included objective lab methods and subjective panel studies on different hair types. Commercial conditioning polymers: PQ-67 (Polymers SoftCAT~(TM3)) and cationic guar~4 (Jaguar C-13S~(®5)) were used as performance benchmarks.rnIt was found that increasing the cationic charge density of the PQ-67 polymers above 1.45 meq/g (equivalent of 2 weight-percent (wt.%) nitrogen) resulted in a several-fold boost of their co-deposition ability. These experimental, high charge density PQ-67 polymers were shown to deliver silicones and other performance ingredients from shampoo formulations more efficiently than any other polymer currently available on the market for rinse-off hair cleansing/conditioning applications. The polymers also provided improved wet and/or dry conditioning, volume control, and could be instrumental in achieving sleek looking hair and improved control/manageability of unruly or frizzy hair. The high charge density PQ-67 polymers are also ideally suited for highly-fragranced surfactant-based formulas that are used in aromatherapy and spa products due to their superior ability to deliver fragrance.