Polypropylene glycol PPG-600 (CAS: 25322-69-4) is a non-ionic propylene oxide polymer, appearing as a colorless to slightly yellow transparent viscous liquid. With its excellent emulsifying and dispersing properties, stability against acids, alkalis, and hard water, low volatility, and non-ionic characteristics, PPG-600 plays an irreplaceable functional role in multiple industries. Its core value lies in its ability to act both as a synthetic raw material in polymerization reactions and as a functional additive for direct use, offering high flexibility.
From the perspective of process adaptability, PPG-600's high flash point (>200°C closed cup) enables it to withstand high-temperature process conditions, while its broad compatibility with anionic, cationic, and amphoteric surfactants provides formulators with significant compounding freedom. In polyurethane prepolymer synthesis, PPG-600, as a core polyether polyol component, reacts with isocyanates, significantly enhancing the flexibility, resilience, and hydrolysis resistance of the final product.
In the field of industrial auxiliaries, PPG-600's low surface tension and good dispersibility make it an efficient active component in defoamers and mold release agents; in metalworking fluids, it serves a dual function of lubrication and cooling. Additionally, its mild skin compatibility and good biocompatibility make it important in cosmetic moisturizers and pharmaceutical preparation matrices.
| Application Field | Specific Process/Use | Function of PPG-600 |
|---|---|---|
| Polyurethane Industry | Polyurethane prepolymer and elastomer synthesis | As a core polyether polyol component, reacts with isocyanates to endow the product with flexibility, resilience, and hydrolysis resistance |
| Polyurethane foam plastics | Provides chain segment flexibility and reactivity adjustment | |
| Industrial Auxiliaries | Industrial defoamers (fermentation, papermaking, coatings) | Utilizes low surface tension and dispersibility to quickly break foam and inhibit its regeneration |
| Active component in mold release agents | Forms an effective release film, reducing adhesion for smooth demolding | |
| Plasticizers and softeners | Compatible with resin systems, increasing flexibility and soft feel of plastics, rubber, and textiles | |
| Intermediates for non-ionic surfactant synthesis | Preparation of detergents, emulsifiers, etc., through etherification or esterification reactions | |
| Lubricants and Metalworking Fluids | Components of synthetic lubricant base oils and hydraulic fluids | Provides lubricity, thermal oxidation stability, and high viscosity index |
| Water-glycol fire-resistant hydraulic fluids | As a thickener and lubricating component, enhances viscosity stability and load-bearing capacity | |
| Metalworking fluids (cutting fluids, quenching fluids) | Provides lubrication and cooling effects, reducing tool wear; regulates cooling rate in quenching fluids | |
| Daily Chemicals and Pharmaceuticals | Cosmetic solvents and moisturizers | Mild and skin-friendly, providing moisturizing properties and feel improvement |
| Pharmaceutical ointment and suppository bases | As a water-soluble base, offers good biocompatibility and drug release properties | |
| Detergents and personal care products | Enhances formulation uniformity and user experience | |
| Textile Industry | Textile softening finishing | As a softener component, improves fabric hand feel |
| Textile auxiliaries | Wetting agent function, improving efficiency in dyeing and finishing processes |
Polyurethane Synthesis Process: It is recommended to use PPG-600 as the soft segment component, compounded with other polyether polyols of different molecular weights based on the hardness and elasticity requirements of the target product. During prepolymer synthesis, strictly control moisture content (recommended below 0.05%) to avoid side reactions with isocyanates.
Defoamer Formulation: PPG-600 can serve as a base component in defoamers, used synergistically with hydrophobic silica, silicones, etc. The recommended dosage range is 0.1% to 2% depending on the foam level of the specific system.
Metalworking Fluid Formulation: In water-based cutting fluids and quenching fluids, the recommended addition amount of PPG-600 is 5% to 30%, depending on the required lubricity and cooling capacity. It can be compounded with rust inhibitors, extreme pressure additives, etc.
Daily Chemical Products: When used as a moisturizer or solvent in cosmetic formulations, the recommended addition amount is 1% to 10%. Its non-ionic nature ensures good compatibility with various surfactant systems.