Description

Polyacrylamide-2 Crosspolymer is a crosslinked copolymer composed of Isopropyl Methacrylamide, Ethylhexyl Acrylate, Dodecyl Acrylate, and Isopropylacrylamide, with a crosslinked structure achieved through PEG-4 Diacrylate. This polymer combines hydrophobic and hydrophilic properties, making it useful in cosmetic applications, particularly as a film-forming agent and thickener.

Chemical Composition and Structure

Polyacrylamide-2 Crosspolymer is composed of the following monomers:

Isopropyl Methacrylamide: Provides stability and hydrophobic properties to the polymer.
Ethylhexyl Acrylate: An acrylate monomer that enhances the flexibility and durability of the polymer.
Dodecyl Acrylate: A long-chain monomer that adds hydrophobic properties and improves the polymer's film-forming ability.
Isopropylacrylamide: A hydrophilic monomer that balances the hydrophobic and hydrophilic properties of the polymer.

The polymer is crosslinked using PEG-4 Diacrylate, which creates crosslinks between the polymer chains, resulting in a stable three-dimensional structure and increasing the polymer's viscosity and strength.

Physical Properties

Polyacrylamide-2 Crosspolymer is a crosslinked polymer with a gel-like consistency and high viscosity. It is insoluble in water but can swell and form gels, making it useful as a thickener and stabilizer in cosmetic formulations. Due to its crosslinked structure, the polymer is heat-resistant and mechanically robust, and it exhibits excellent film-forming properties, creating a protective barrier when applied to the skin or hair.

Production Process

The production of Polyacrylamide-2 Crosspolymer involves free radical polymerization in the presence of a crosslinking agent, PEG-4 Diacrylate. The monomers Isopropyl Methacrylamide, Ethylhexyl Acrylate, Dodecyl Acrylate, and Isopropylacrylamide are dissolved in a suitable medium, and the polymerization is initiated by adding an initiator, such as ammonium persulfate. During polymerization, the PEG-4 Diacrylate forms crosslinks between the polymer chains, creating a three-dimensional structure. After the reaction, the polymer is purified to remove unreacted monomers and other byproducts.

Applications

Polyacrylamide-2 Crosspolymer is primarily used in the following areas:

Cosmetics and Personal Care Products: Functions as a thickener, stabilizer, and emulsifier in creams, lotions, and gels for skin and hair care. Due to its film-forming properties, it is used in products to improve skin texture and create a protective barrier.
Sunscreen Products: Used in sunscreen formulations to stabilize the product and enhance water resistance.
Makeup and Hair Styling Products: Enhances product consistency and hold, providing long-lasting effects and optimal aesthetic results.

Environmental and Safety Considerations

Polyacrylamide-2 Crosspolymer is generally considered safe for use in cosmetics and personal care products when used at appropriate concentrations. However, like many synthetic polymers, it may present environmental challenges if not disposed of properly. Its degradation in the environment is slow, potentially leading to accumulation in water systems and soil, with possible negative effects on aquatic life. Additionally, during production and handling, precautions should be taken to avoid exposure to unreacted monomers, which may be irritants or toxic. Following safety regulations is essential to minimize health and environmental risks.

INCI


Film-forming agent. It produces, upon application, a very thin continuous film with an optimal balance of cohesion, adhesion and stickiness on skin, hair or nails to counteract or limit damage from external phenomena such as chemicals, UV rays and pollution.
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