Polyquaternium-6, -7, and -10 are three widely used cationic polymers in personal care products, primarily applied in shampoos, body washes, conditioners, hand soaps, leave-in products, and more. They all improve combability, reduce static, and enhance hair smoothness. However, due to differences in their structure, molecular weight, and charge density, their characteristics and suitable application scenarios are distinctly different.

Performance Comparison (Core Differences)

  1. Conditioning and Smoothing Performance

    • PQ-6: Medium to Strong

      • High charge density → Good adsorption

      • Suitable for general smoothing shampoos.

    • PQ-7: Moderate and Gentle

      • Light conditioning, not heavy → Strong consumer acceptability.

      • Suitable for daily shampoos and body washes.

    • PQ-10: Strong and Noticeable

      • Because it is a high molecular weight cellulose derivative → Strong film-forming sensation.

      • Suitable for repairing damaged hair, intensive conditioners, and silicone-free shampoos.

  2. Freshness/Feel vs. Heaviness/Richness

    • High Freshness/Light Feel → PQ-7

    • Moderate → PQ-6

    • Richer/Heavier Feel → PQ-10

    • Note: Excessive use of PQ-10 can lead to an "over-conditioned" feeling, which can be an advantage for damaged hair.

  3. Anti-Static Ability

    • PQ-6 = Strong (due to high charge density)

    • PQ-7 = Moderate, with good lasting effect

    • PQ-10 = Relatively Strong

Application Scenario Comparison (Selection Guide)

  1. Polyquaternium-6 (PQ-6) is suitable for:

    • Anti-dandruff shampoos (no interference with cationic anti-dandruff agents)

    • Refreshing smoothing shampoos

    • Hand soaps, body washes (non-sticky feel)

    • Industrial cleansing products (lower cost, stable effect)

    • Key Features: Strong adsorption, strong anti-static, medium conditioning ability.

  2. Polyquaternium-7 (PQ-7) is suitable for:

    • Mass-market shampoos (for daily use)

    • Body washes (improves skin feel and slip)

    • Shaving creams, shaving gels

    • Clear shampoos, colorless systems

    • Key Features: Refreshing and lightweight, very broad compatibility. A commonly used PQ by formulators.

  3. Polyquaternium-10 (PQ-10) is suitable for:

    • Shampoos for repairing permed/color-damaged hair

    • Intensive conditioners

    • Silicone-free smoothing products

    • Leave-in hair sprays, hair masks

    • Key Features: Strong moisturizing, strong film-forming, strong repairing ability.