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What is the difference between hydroxypropylmethylcellulose and hydroxyethylcellulose?

What is the difference between hydroxypropylmethylcellulose and hydroxyethylcellulose?

2023-07-10 17:30:42

The difference between hydroxypropylmethylcellulose and hydroxyethylcellulose: different properties; different uses; different solubility.

1. Different traits

Hydroxypropylmethylcellulose: white or off-white fibrous or granular powder, belonging to a variety of nonionic cellulose mixed ethers.It is a semi-synthetic, inactive, viscoelastic polymer.

Hydroxyethyl cellulose: (HEC) is a white or light yellow, odorless, non-toxic fibrous or powdered solid prepared by the etherization reaction of alkaline cellulose and ethylene oxide (or chloroethanol). It is a nonionic soluble cellulose ether.

2. Different uses

Hydroxypropylmethylcellulose: Used as a thickener, dispersant and stabilizer in the coating industry, it has good compatibility in water or organic solvents.As a paint remover; used as a dispersant in the production of polyvinyl chloride, it is the main additive for the preparation of PVC by suspension polymerization; it is also widely used in the leather, paper products industry, fruit and vegetable preservation and textile industry.

Hydroxyethyl cellulose: used as adhesives, surfactants, colloidal protectants, dispersants, emulsifiers and dispersion stabilizers.It has a wide range of applications in the fields of coatings, inks, fibers, dyeing, papermaking, cosmetics, pesticides, mineral processing, oil production and medicine.

3. Different solubility

Hydroxypropylmethylcellulose: It is almost insoluble in absolute ethanol, diethyl ether, and acetone; it swells into a clear or slightly turbid colloidal solution in cold water.

Hydroxyethyl cellulose: It has the properties of thickening, suspending, bonding, emulsifying, dispersing, and retaining moisture.Solutions of different viscosity ranges can be prepared.It has unusually good salt solubility in electrolytes.

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