What is hydroxyethylcellulose?
Hydroxyethylcellulose HEC Powder CAS No. 9004-62-0
Hydroxyethyl cellulose is a non-ionic ether prepared from natural polymer cellulose through chemical processes. It is an odorless, tasteless, non-toxic white powder or particle that can be dissolved in cold water to form a transparent viscous solution, which is not affected by pH. It has the properties of thickening, bonding, dispersion, emulsification, film formation, suspension, adsorption, surface activity, water retention, and salt resistance.
Product Speclficatlons of Hydroxyethyl cellulose
| Type | TRE-3W | TRE-5W | TRE-10W |
| Loss on Drying | 6.00% | 6.00% | 6.00% |
| Ash content | ≤ 6.0% | ≤6.00% | ≤ 6.0% |
| PHvalue(1% solution) | 6.0-8.5 | 6.0-8.5 | 6.0-8.5 |
| Viscosity(1%, 25℃)mpa.s | 1501-2600 | 2601-3400 | 3401-6000 |
Physical and chemical properties of Hydroxyethyl Cellulose HEC Powder
1. HEC powder is soluble in hot water or cold water, and high temperature or boiling does not precipitate, so HEC powders have solubility and viscosity properties and are non-thermal gelatinizing;
2. Hydroxyethyl cellulose is non-ionic and can co-exist with other water-soluble polymers, surfactants and salts over a wide range.
It is an excellent colloidal thickener for solutions containing high concentrations of dielectrics;
3. HEC has twice the water-holding capacity of methylcellulose, providing better flow regulation;
4. HEC has the least dispersing ability but the most colloid-protecting ability compared to the recognized methylcellulose and hydroxypropylmethylcellulose.
hydroxyethylcellulose
Hydroxyethyl Cellulose Application
1. For waterborne emulsion paints: HEC powder can be used in vinyl acetate emulsion polymerization to improve the stability of the polymerized system over a wide pH range.
Additives such as pigments and fillers are uniformly dispersed, stabilized and provide thickening in the production of the finished product.
HEC powders are also used as dispersants for suspension polymers such as styrene, acrylates and acrylics.
Its use in emulsion paints greatly improves their thickening and leveling properties.
2. In oil drilling: HEC is used as a thickener in a variety of muds required for drilling, cementing, cementing, and fracturing operations to give the mud good fluidity and stability.
It improves mud-carrying capacity during drilling, prevents a large amount of water from entering the oil reservoir from the mud, and stabilizes the oil reservoir production capacity.
3. Construction building materials: Hydroxyethyl cellulose HEC powder has strong water retention capacity and is an effective thickener and binder for cement paste.
Mixed into mortar, it can improve the fluidity and construction performance, prolong the water evaporation time, improve the initial strength of concrete, avoid cracks.
When used in plastering, bonding and plastering putty, HEC can significantly improve its water retention and bonding strength.
4. Application in toothpaste: As HEC has strong salt resistance and acid resistance, it can ensure the stability of toothpaste.
In addition, toothpaste has strong water retention and emulsification, not easy to dry.
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5. For water-based ink, HEC powder can make the ink dry quickly and impervious to water.
Precautions for Using HEC Powder
Hygroscopicity: All types of hydroxyethyl cellulose HEC have hygroscopicity. The water content is generally below 5% when leaving the factory, but due to the different transportation and storage environments, the water content will be higher than when leaving the factory. When using it, just measure the water content and deduct the weight of the water when calculating. Do not Expose it to the atmosphere.
Dust powder is explosive: if all organic powders and hydroxyethyl cellulose dust powder are in a certain proportion in the air, they will also explode when they meet a fire point. Proper operation should be done to avoid generating dust powder in the atmosphere as much as possible.
Packaging and storage of Hydroxyethyl Cellulose HEC Powder
Hydroxyethyl cellulose is packed in film coated plastic bags with net weight of 25 kg.
Avoid rain during storage and transportation.
Fireproof and moisture proof.
packages
FAQs of hydroxyethylcellulose:
Q: What is hydroxyethylcellulose?
A: HEC polymers are largely used as water-binder and thickening agent in many industry applications, that is, personal care products, pharmaceutical formulations, building materials, adhesives, etc., and as stabilizer for liquid soaps.
Q: What are the different types of HEC?
A: HEC is available in two types: normal type and improved solubility type. The normal type has a high dissolution rate and can be added to water with stirring to quickly prepare an aqueous solution. The improved solubility type has a lower dissolution rate and improved dispersibility in water by surface treatment.
Q: Is hydroxyethylcellulose safe?
A: It is currently used in concentrations as low as 0.0002%, and as high as 39%. The independent Cosmetic Ingredient Review panel has ruled hydroxyethylcellulose safe as used in cosmetics, even in amounts much higher than what would occur from normal human exposure.
Q:Is hydroxyethylcellulose natural or synthetic?
A: Hydroxyethylcellulose is a natural gum derived from pine and spruce tree trunks (debarked logs) grown and harvested from plantations in the United States, France, Norway, and Canada. Hydroxyethylcellulose is an excellent thickening agent and a non-ionic rheology modifier.
