Polyquaternium-55 is a multifunctional and hydrophobically modified polymer.
Used mainly in hair cosmetics.
- Provides a smooth and moisturized feel.
- Polyquaterniums find particular application in conditioners, shampoo, hair mousse, hair spray, hair dye, and contact lens solutions. Because they are positively charged, they neutralize the negative charges of most shampoos and hair proteins and help hair lie flat. Their positive charges also ionically bond them to hair and skin. Some have antimicrobial properties.
Source: Wikipedia, https://en.wikipedia.org/wiki/Polyquaternium