The key to using Peregal O-50/100 lies in controlling the dissolution temperature and dosage: it is recommended to dissolve in hot water at 40–60°C and then add to the formulation system. The specific dosage should be determined through small-scale trials.
Detailed Explanation
Peregal O-50 and O-100 are both high-polymerization-degree fatty alcohol polyoxyethylene ether (AEO) nonionic surfactants. Their dissolution methods are slightly different: Peregal O-50 is a white to slightly yellow waxy solid, easily soluble in hot water but dispersible in cold water, so it must be dissolved in hot water at 40–60°C; Peregal O-100 is a white to slightly yellow flake or granular solid with better solubility, capable of dispersing and dissolving directly in normal-temperature aqueous solutions, or in heated water for faster dissolution. The general principle is: Slowly add the product to hot water at 40–60°C, stirring continuously until completely dissolved, forming a clear or uniformly dispersed liquid, then add to the formulation system and mix evenly.
Regarding dosage, recommended amounts vary widely depending on the application: when used as a leveling agent in textile dyeing and finishing, typically 0.5%–3% by weight of fabric; as an O/W emulsifier, generally 2%–10% by weight of the oil phase; as a nonionic emulsifier component in pesticide EC formulations, approximately 5%–15% of the total formulation; in industrial cleaning formulations, the recommended dosage is 2%–8%. All the above are reference ranges. It is strongly recommended to conduct small-scale trials to determine the optimal dosage and dissolution conditions for your specific process to achieve ideal results.
In compound formulations, Peregal O-50/100 can be well combined with anionic, cationic, and other nonionic surfactants, forming mixed micelles that produce synergistic effects. They can also be blended with each other — Peregal O-50 has relatively stronger lipophilicity, while Peregal O-100 is more hydrophilic. A proper combination can flexibly adjust the HLB value to meet the emulsification needs of different oil-phase systems.
Application Suggestions
Select the product and usage method according to the specific process scenario as follows:
- High-temperature and high-pressure leveling (polyester dyeing): Preferably use Peregal O-100, whose high HLB value and high cloud point impart excellent high-temperature leveling properties, effectively preventing uneven dyeing. Peregal O-50 is more suitable for dyeing blended fabrics at medium temperature.
- O/W emulsion preparation (cosmetics, emulsion polymerization): Peregal O-50 is the first choice as the primary emulsifier, while Peregal O-100 can serve as a co-stabilizer. Their combination yields finer emulsion particle size and better long-term storage stability.
- Pesticide EC/EW formulations: Peregal O-50 and O-100 are used in combination; Peregal O-50 promotes emulsification, while Peregal O-100 provides steric stabilization. They self-emulsify upon addition to water, ensuring uniform spray application of the pesticide liquid.
- Metalworking fluids (semi-synthetic cutting fluids, rolling oils): Peregal O-50 provides emulsification and wetting, while Peregal O-100 enhances electrolyte resistance and anti-rust protection.
- Heavy-duty industrial cleaning: Peregal O-100 efficiently emulsifies and removes heavy oil soils in high-temperature, strong-alkali cleaning systems; a blend of Peregal O-50 and O-100 used for hard surface cleaning of vehicles and ships offers excellent alkali resistance and synergistic detergency.
- Leather degreasing and soaking: Peregal O-50 is used as a soaking auxiliary to accelerate re-softening, and Peregal O-100 is used for degreasing and emulsifying to remove natural fats.
Precautions
- Avoid excessively high dissolution temperatures: Operating temperature should not be too high to prevent thermal decomposition that may generate irritating fumes.
- Avoid dust inhalation: Work in a well-ventilated area. If dust is generated, wear a particulate filtering mask (e.g., N95).
- Personal protection: It is recommended to wear nitrile rubber gloves and chemical safety goggles during operation. Wash hands thoroughly after handling.
- Storage conditions: Recommended storage temperature not exceeding 40°C; keep containers tightly closed, avoid direct sunlight, and keep away from strong oxidizers, strong acids, and strong alkalis.
- Compatibility test: When combining with anionic or cationic surfactants for the first time, conduct a small-scale compatibility test beforehand to avoid precipitation or failure caused by ionic incompatibility.
