According to the technical data of Guoli Chemical, if you encounter problems during the use of PEG-400 Distearate (PEG 400DS), we recommend that you first conduct a preliminary investigation based on common phenomena. If you need direct technical support, please contact the technical team of Guoli Chemical through the official sales channel where you purchased the product.
Although the current query did not directly return the company's contact information, based on the product technical data, we have compiled the following professional troubleshooting guide and general help-seeking path for you.
### 1. Usage Problem Troubleshooting Guide
As a nonionic surfactant, the emulsifying, dispersing, and thickening properties of PEG-400 Distearate (PEG 400DS) are affected by the system environment, process conditions, and other factors. The following table summarizes common problems and possible causes for your quick reference:
| Common Problem | Possible Cause | Troubleshooting and Solution Suggestion |
| :--- | :--- | :--- |
| **Insufficient emulsification power, lotion/cream separation** | 1. **Insufficient dosage**: Not reaching the critical micelle concentration.
2. **HLB value mismatch**: Large deviation between the required HLB value of the oil phase and the HLB value of PEG 400DS.
3. **Improper feeding order or process**: Unsuitable mixing speed or temperature for the oil and water phases.
4. **Effect of system pH/electrolyte**: Although the product is resistant to acid and alkali, extreme conditions may affect specific oil phases. | 1. It is recommended to start with an addition amount of **1.0% - 5.0%** of the total system weight, gradually optimizing.
2. Check the required HLB value of the oil phase. PEG 400DS is a lipophilic emulsifier. If insufficient hydrophilicity, a small amount of high HLB value emulsifier (e.g., PEG-400 monostearate) can be blended.
3. Ensure that the oil phase is slowly added to the water phase under high-speed homogenization (**5000 - 8000 rpm**) at **70°C - 80°C**.
4. Check and maintain the system pH within the neutral range of **5.0 - 8.0**. |
| **Poor dispersion effect, particle agglomeration** | 1. **Low dispersant dosage**.
2. **Excessively fine or high surface energy of the solid particles to be dispersed**.
3. **Low viscosity of the dispersion medium**. | 1. Gradually increase the dosage of PEG 400DS to **2% - 5%** of the particle weight.
2. Introduce a small amount of polymer stabilizer (e.g., xanthan gum) to work synergistically with PEG 400DS, increasing steric hindrance.
3. Appropriately increase system viscosity to delay particle sedimentation. |
| **Thickening effect not meeting expectations** | 1. **Dosage not reaching the effective thickening concentration**.
2. **Lack of thickening synergist in the system**.
3. **Temperature too high**, exceeding the cloud point leading to decreased solubility. | 1. In systems like shampoo and body wash, the effective thickening concentration is usually **1.5% - 3.0%**.
2. A small amount of **0.5% - 1.5%** cocamidopropyl betaine (CAB) or sodium chloride can be blended for synergistic thickening.
3. Ensure the preparation and storage temperature is below **40°C** to avoid product performance degradation. |
| **Slow dissolution rate, granular feeling** | 1. **Directly added to cold water**.
2. **Insufficient stirring speed**. | 1. PEG 400DS is a waxy solid and needs to be melted and dispersed in hot water above **70°C** or in the oil phase. It is recommended to heat to melt first, then stir into the water phase.
2. Maintain continuous stirring until a uniform system is formed. |
| **Product surface not smooth, with fine foam** | Excessive dosage or uneven mixing when used as an internal lubricant in plastic and rubber processing. | Strictly control the addition amount between **0.2% - 1.0%**, and ensure uniform dispersion in the polymer melt through equipment such as twin-screw extruders. |
### 2. Ways to Obtain Technical Support
If the above troubleshooting does not solve your problem, we recommend the following ways to seek official technical support:
1. **Contact the original supplier/distributor**:
This is the fastest and most effective path. Please contact the sales manager or authorized distributor from whom you purchased the Guoli Chemical product directly; they will connect you precisely with Guoli Chemical's technical application team.
2. **Check product accompanying documents**:
Product packaging or transaction documents usually include:
* **Certificate of Analysis (COA)**: Verify that key indicators (e.g., hydroxyl value, acid value) are within the standard range.
* **Safety Data Sheet (SDS)**: The document contains the supplier's emergency contact number and basic information, which can be used for initial contact.
3. **Query corporate information platforms**:
You can search for "Hai'an Guoli Chemical Co., Ltd." on public business information platforms such as "Tianyancha" or "Qichacha" to obtain the company's registered address, official contact number, and email for the latest contact information.
**Note**: When contacting technical support, please be sure to prepare the following information so that the technician can quickly locate the problem:
* **Product batch number** (found on packaging or COA).
* **Your complete basic formula** (core ingredients can be omitted, but the system overview and the stage at which PEG 400DS is added should be provided).
* **Detailed preparation process** (feeding order, temperature, stirring speed, and time).
* **Clear description of the problem phenomenon** (preferably with comparison photos of normal and abnormal conditions).
