Essential ingredients and aerosol formulation

The efficacy and safety of an aerosol product depend on a precise and balanced formulation. At Ilerspray, thanks to more than a decade of experience in developing aerosol solutions for various sectors such as home, automotive, and industry, we understand that each ingredient serves a specific function and its proportion determines the final performance of the product.

Fundamental components in aerosol formulation

An aerosol is not simply a liquid in a pressurized container. Behind every formulation lies meticulous work in raw material selection, chemical compatibility, and efficacy validation. The four essential components are:

• Active ingredients
• Solvents
• Additives
• Propellants

1. Active ingredients: the primary function

The active ingredient is the component responsible for the aerosol's main effect. In insecticide products, this would be the biocidal principle; in cosmetics, the deodorizing or moisturizing agent; in automotive products, it can be a cleaner or lubricant. Selection is based on efficacy, safety, compatibility with other components, and regulatory compliance.

Examples of active ingredients include:

• Pyrethrins in insecticides.
• Alcohols and hydrochlorides in deodorants.
• Silicones or waxes in automotive polishes.

European legislation, under the REACH regulation and Regulation (EC) No 1223/2009 for cosmetics, imposes strict controls on these compounds.

2. Solvents: facilitating application and stability

Solvents allow active ingredients to dissolve or disperse uniformly. They also help the product to be released homogeneously upon application. They can be organic (such as ethanol, isopropanol) or aqueous. The choice depends on the nature of the active ingredient and the application environment.

Solvent safety is key. Aspects such as volatility, toxicity, and flash point must be considered. For example, in industrial environments, fast-evaporating solvents that leave no residue are often chosen.

3. Additives: stability, aroma, and performance

Additives complement and improve the aerosol's action. They include:

• Stabilizers to prolong the product's shelf life.
• Preservatives (such as phenoxyethanol) in cosmetic products.
• Aromas, in the case of air fresheners or deodorants, formulated with essential oils or synthetic compounds.
• Colorants, to visually identify the product's function or provide appeal.

The proportion of these ingredients is usually minimal, but their presence makes a big difference in user perception and product efficacy.

4. Propellants: dispensing technology

The propellant is the gas or mixture of gases that allows the product to be expelled from the container when the valve is pressed. The most commonly used are:

• Hydrocarbons like butane, propane, and isobutane.
• Carbon dioxide (CO₂) and nitrogen (N₂), used in ecological or technical formulas.
• Hydrofluoroalkanes (HFA), mainly in pharmaceutical applications.

At Ilerspray, we opt for low environmental impact options, prioritizing recyclable and non-polluting propellants. Additionally, we conduct strict safety and leak tests using hot water baths and pressure control to ensure container integrity.

Importance of exact proportions

An unbalanced formulation can compromise the safety, efficacy, and stability of the aerosol. The proportion of each ingredient is determined in the laboratory phase through performance, compatibility, and stability tests. Subsequently, it is scaled to an industrial level with automated measurement systems.

At Ilerspray, we use mixers with numerical controllers that ensure precise dosing. Proportions must be adjusted according to the type of valve, the type of container (aluminum or tinplate), and the dispensing system (continuous spray, foam, gel, etc.).

For example, an industrial degreaser must contain a higher percentage of lipophilic solvents and a propellant that guarantees a targeted application. In contrast, an air freshener requires a greater presence of aromas and lower pressure for a gentle diffusion.

Innovation and sustainability at Ilerspray

At Ilerspray, formulation is not only based on performance but also on sustainability. We implement waste reduction systems, container recycling, and select ingredients with a lower environmental footprint.

Furthermore, our processes comply with regulations such as ISO 9001 and ISO 22716, guaranteeing quality from the raw material to the final product.

Conclusion

The success of an aerosol lies in the exact balance between its components. From the active ingredient to the type of propellant, every technical decision influences the safety, efficacy, and perception of the product. Ilerspray's experience, innovation, and commitment to sustainability make it possible to offer tailor-made aerosol solutions adapted to the needs of each sector.

At Ilerspray, we are specialists in the formulation and manufacture of aerosols for multiple applications. Whether you need an air freshener, an industrial degreaser, or a cosmetic deodorant, we can develop a solution adapted to your needs, meeting the highest standards of quality and sustainability.