Polypropylene glycol PPG-600 is a non-ionic polypropylene oxide polymer with stable chemical properties and wide compatibility, rarely causing serious problems under normal use conditions. If anomalies occur during use, they are usually related to factors such as storage conditions, operating procedures, formulation compatibility, or contamination by impurities. It is recommended to follow the approach of "self-check first, then consult" for step-by-step troubleshooting. Most issues can be resolved by adjusting operating conditions.
Guoli Chemical provides Safety Data Sheets (SDS) and Technical Data Sheets (TDS) for all products, which contain detailed operating specifications, emergency response measures, and technical parameters. When users encounter issues during use, they can first refer to these documents for immediate guidance. If the problem remains unresolved, the technical team at Guoli Chemical can provide one-on-one technical consultation services.
| Common Issue | Possible Cause | Recommended Action |
|---|---|---|
| Turbidity, layering, or precipitation in the product | Long-term low-temperature storage leading to increased viscosity or partial solidification; or moisture absorption during storage | Heat the product to 20°C~40°C and stir thoroughly before use; check container sealing to avoid prolonged exposure to humid air |
| Abnormal increase in product viscosity | Storage temperature too low (below 5°C); or product exceeds recommended storage period | Allow natural temperature recovery in a room-temperature environment; if necessary, use a warm water bath (not exceeding 40°C) to heat and stir until uniform; confirm production date and shelf life of the product |
| Incompatibility or precipitation during compounding | Mixing with strong acids, strong oxidizers, or incompatible systems; pH conditions too extreme | PPG-600 is non-ionic and should be compatible with anionic, cationic, or amphoteric surfactants; check for strong oxidizers or strong acids in the formulation; adjust the formulation pH to neutral or slightly acidic/alkaline range |
| Abnormal polyurethane synthesis reaction (e.g., reaction too fast/slow, product performance not meeting standards) | Excessive moisture content in raw materials; improper isocyanate ratio; incorrect reaction temperature control | Dehydrate PPG-600 before use (vacuum heating dehydration); accurately calculate and control the isocyanate index; strictly control the reaction temperature according to process requirements |
| Poor defoaming performance | Insufficient dosage; pH or temperature of the system beyond applicable range; improper dispersion method | Optimize dosage and ensure thorough dispersion; PPG-600 is stable under a wide pH range, but extreme conditions require verification; adjust the timing of addition and stirring conditions |
| Product color darkening | Trace oxidation due to high temperature or long-term storage; incompatible container material | Check if storage temperature exceeds 40°C, avoid prolonged high temperatures; ensure use of stainless steel, carbon steel, or polypropylene containers, avoid incompatible materials |
If the problem remains unresolved after the above troubleshooting, you can contact Haian Guoli Chemical Co., Ltd. via the following methods for professional technical support:
To help technical personnel efficiently diagnose the issue, it is recommended to prepare the following information in advance: