The difference of PEG4000/6000/8000 with different functions.
The company with many years experience produce high quality of PEG product.
Polyethylene glycol series is a general polymer additive for fine chemicals, PEG4000、 6000 and 8000 exhibit significant differentiation in dispersion, lubrication, film-forming, and solubility properties, and are widely matched with textile, daily chemical, rubber, and coating formula selection, becoming key reference categories for additive procurement and formula optimization.
1、 Basic physical and chemical comparison
* PEG4000: molecular weight 3200-4800, melting point 53-59 ℃
White particles, with the fastest water solubility, low viscosity, moderate hydrophilicity, and average salt resistance;
*PEG6000: molecular weight 5500-7000, melting point 58-63 ℃
Medium molecular weight, moderate viscosity, balanced dispersion and lubrication, with the highest market universality;
*PEG8000: molecular weight 7000-9000, melting point 60-65 ℃
The maximum molecular weight, highest melting point, high viscosity, optimal film-forming, dispersion, and anti caking properties, and the most difficult to dissolve in cold water.
Commonality: Neutral aqueous solution, resistant to weak acids and bases, can be combined with Pingpingjia O-20/O-25 to enhance efficiency.
2、 Characteristics of functional differentiation
PEG4000 (small molecular weight)
-Advantages: fast dissolution, good fluidity, outstanding moisturizing, low viscosity, weak thickening;
-Shortcomings: Dispersion, lubrication, and weak resistance to clumping.
Main products: daily moisturizing agents, tablet adhesives, low viscosity cleaning agents, small spinning oil agents
PEG6000 (mid-range universal version)
-Advantages: Lubrication, dispersion, balanced moisturizing, highest cost-effectiveness, and a universal mainstay in the entire industry;
-Shortcoming: The high-strength dispersed working condition is not as good as 8000.
Main products: Rubber and plastic universal lubrication, dye dispersion, printing paste, conventional cleaning and care products
PEG8000 (high molecular weight)
-Advantages: Super dispersed anti settling, excellent external lubrication, dense film formation, top-notch powder anti caking;
-Shortcomings: slow dissolution, high viscosity, and highest unit price of raw materials.
Main features: high concentration color paste grinding, high-end rubber demolding, feed anti caking, chemical fiber anti-static
3、 Selection Guide for Various Industries
*Textile printing and dyeing
-PEG4000: Fabric moisturizing and low concentration leveling agent, dosage 0.4-1g/L;
-PEG6000: Conventional dispersed dyes, printing anti sticking (slurry 2% to 5%);
-PEG8000: High concentration color powder grinding, high-temperature chemical fiber anti-static (slurry 2%~4%).
*Rubber processing
-PEG4000: Soft plastic internal lubrication, adding 0.5% to 2%;
-PEG6000: PVC universal internal and external lubrication (0.5%~3%);
-PEG8000: Hard rubber demolding, filler dispersion (0.3% to 2.5%).
*Daily chemical cleaning and care
-PEG4000: face cream, essence moisturizing (add 1%~7%);
-PEG6000: Toothpaste, regular cream setting (2% to 8%);
-PEG8000: Solid soap, high hardness paste (2%~10%).4. Coatings/Industrial Cleaning
-PEG4000: Light scale cleaning agent solubilizing aid;
-PEG6000: Conventional water-based coating dispersion;
-PEG8000: High solid color paste anti settling and heavy oil pollution additive.
*Summary of Usage and Cost
1. Difficulty of dissolution: 4000>6000>8000, all require hot water dissolution at 65-85 ℃;
2. Performance strength (dispersion/lubrication/film formation): 8000>6000>4000;
3. Unit price of raw materials: 8000>6000>4000.
5、 Market prospects
Under the trend of downstream formula refinement and upgrading, PEG4000 is selected for low formula cost,
PEG6000 is selected for general production,
PEG8000 is selectively purchased for high-end high-performance products.
The three products complement each other and remain in the essential category of additives for a long time.
