Hydroxylpropyl cellulose (HPC) is a nonionic water-soluble
cellulose ether with a versatile combination of properties: it
combines organic,solvent solubility, thermoplasticity, and surface
activity with the thickening and stabilizing properties of other
water-soluble cellulose polymers.
HPC is soluble in many polar organic solvents and in water below 38℃,but is insoluble in water above 45℃.HPC is highly surface-active, with low surface and interfacial
tensions of solutions. It has a wide range of viscosities of
varying concentrateions in water.
HPC is versatile: it is used in wide variety of applications,
cosmetics, pharmaceuticals, coatings, adhesives extrusions and
paper,paint removers,encapsulateions inks, and many other
requiring a film-former, stabilizer, suspending agent, film
or protective colloid.
Ⅳ.Grades and Types
Hydroxylpropyl cellulose (HPC) is produced in standard and premium
grades. The standard grades is for Industrial uses, the premium
grades, designated for manufacturing use only, are for foods,
pharmacyeutical, and cosmetic. All viscosity types are available in
each grade. Solution viscosities of the various types are shown in
Table Ⅰ. Typical properties of the polymer and its solutionsare given in
Table lviscosity of various solution types, mpa.s
Concentration in water, weight％
Viscosities determined 25℃ using a Brook field viscometer with spindle and speed combinations
depending on viscosity level. Ranges shown in this table are not
necessarily current specifications.
Appearanceoff-white, Tasteless powder
Particle size ％ min