Polyester-5 is a complex chemical compound, a synthetic polymer.

The name defines the structure of the molecule:

• Polyester: Polyesters are a type of polymer consisting of ester functional groups in their main chain. They are often used in the production of fabrics, resins and films for their durability, chemical resistance and ability to absorb dyes.
• 5: The following number "Polyester" indicates the length of the polymer chain. In this case, "Polyester-5" refers to a polyester with a relatively short chain.

The synthesis process takes place in several stages:

• Preparation of the monomer: The process begins with the preparation of the monomers, which are the constituents of the polymer. For polyesters, it is typically a diacid and a diol.
• Polymerization: Monomers are reacted together in a process called polymerization. This involves the formation of an ester bond between the acid and alcohol groups of the monomers, with the elimination of a water molecule.
• Processing of the polymer: The resulting polymer is transformed into the desired shape. This may involve melting and extrusion into fibres for use in fabrics, or melting into sheets for use in packaging.

Significant substances used in the production method:

isophthalic acid, sulfoisophthalic acid, 1,4-cyclohexanedimethanol, diethylene glycol.

What it is used for and where

Polyesters are synthetic polycondensation polymers that are generally derived from dicarboxylic organic acids and diols and contain an ester functional group on the main polymer chain.

Cosmetics

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

Surfactant - Suspending agent. Cosmetic or pharmaceutical suspensions are known to be thermodynamically unstable and it is therefore essential to include in the formulation a suspending agent capable of dispersing any sedimented particulates and reducing the rate of sedimentation. The presence of this agent increases the consistency of the suspension medium and exerts a protective colloidal action with a surfactant action.

Viscosity control agent. It controls and adapts, Increasing or decreasing, viscosity to the required level for optimal chemical and physical stability of the product and dosage in gels, suspensions, emulsions, solutions.