Hydroxypropyl Starch Ether

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Product overview

HPS Profile

Hydroxypropyl Starch Ether (HPS) is a fine white powder produced by the reaction of starch and propylene oxide under strong alkaline conditions. It has good fluidity and water solubility; its aqueous solution is transparent and colorless with good stability.


White powder, free-flowing

Solid content


Ph Value (2%, 25℃)

Alkaline, 8-11.5

Viscosity (5%, 20℃ aqueous solution)


Loss on drying


Hydroxypropyl Content


Bulk Density

0.45-0.61 g/cm3

MikaZone HPS

Typical Applications & Benefits

Hydroxypropyl starch ether (HPS) is suitable for various types of cement, gypsum, gray calcium-based) interior and exterior wall putty, and various types of finishing mortars and plastering mortars. It has good compatibility with other building materials and is especially suitable for construction dry mixes such as mortars, adhesives, plasters, and roller plasters.

MikaZone HPS in Tile Adhesives
MikaZone HPS in Wall Putty
MikaZone HPS in Plastering Mortars

Hydroxypropyl starch ether is mainly used as a thickener in mortar to improve the sag resistance of mortar, reduce the adhesion of wet mortar, extend the opening time, etc.
It is usually used in combination with hydroxypropyl methylcellulose. Hydroxypropyl starch ether is cost-effective and can partially replace more expensive additives. Low dosages can provide a good thickening effect, improve the workability of dry-mix mortars, prevent knife sticking, and improve adhesion to the substrate.

The recommended addition amount of HPS is 0.1%-0.2% (0.05-0.1), and the hydroxypropyl methylcellulose (HPMC) should be reduced by about 0.1%-0.2% (0.1) based on the original formula. That is, 20%-30% of hydroxypropyl methylcellulose (HPMC) in the original formula is replaced by HPS, which can improve the construction performance and reduce the production cost by about 10-20%.

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Jinan, Shandong, China.