Libraquat PQ7: Polyquaternium-7 Cationic Surfactant

Libraquat: Polyquaternium-7 Cationic Surfactant

Libraquat PQ7

INCI name: Polyquaterium-7

About Libraquat PQ7:

Libraquat PQ7 by Libra Speciality Chemicals, is a Polycationic copolymer of acrylamide and diallyldimethylammonium chloride. Polyquaterium is the International Nomenclature for Cosmetic Ingredients designation for several polycationic polymers that are used in the personal care industry.

The copolymer is the result of the polymerisation of the diallydimethylammonium chloride (DADMAC) and acrylamide (AAM) to produce polyquaternium-7 (PQ7). The use of these highly stable monomers gives a stable copolymer with a wide range of abilities. The structure of the repeating units, as shown below, and the distribution of these units throughout the copolymer are carefully controlled by the process used here at Libra.

Repeating units of DADMAC

PQ7 is formed of repeating units of DADMAC (1) and AAM (2)

The copolymer is carefully analysed by High Performance Liquid Chromatography (HPLC) here at Libra to ensure the highest quality of customer product. Below is a scheme showing a proposed mechanism used to produce PQ7, through careful control of the reagents and the conditions, e.g. temperature and catalysts levels used, the copolymer can be made with exact specifications.

Libraquat is a cationic water soluble copolymer with excellent cleaning abilities within personal (specifically, hair care). Polyquaternium-7 is perfect for use in spray on, leave in hair conditioners and is an excellent detangler and provides slip for easier wet-combing. In addition, it will add softness and shine to dry hair.
Due to the naturally anionic characteristics of hair the positive charges within PQ7 associate with this negative charge associate to the hair strands the result is smooth hair with a glossy finish by drying as a thin film over the hair strands. This thin invisible film allows hair to hold its shape for longer.


    • Hair conditioners
    • Shampoos
    • Hair-detangling products
    • Emollient skin cleansers
    • Shower gels
    • Liquid hand soaps

Why use Libraquat PQ7?

PQ7 is a very effective polymer within its applications and Libra’s technical department is able to ensure the highest quality of product that matches specifications. The relatively small amounts of PQ7 required within formulation make this a highly efficient and cost effective product.

Why choose Libra Speciality Chemicals to manufacture your Libraquat PQ7 products?

Libra Speciality Chemicals combines state of the art High Power Liquid Chromatography (HLPC) and Gas Chromatography (GC) analytical techniques. Libra Speciality Chemicals can guarantee market leading quality from a UK manufacturer you can trust, at competitive pricing and delivered globally.

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