Hydroxypropyl Starch Ether (HPS) is the general term for a class of modified starches containing ether bonds in the molecule. It is also called etherified starch. HPS is mainly used in the mortar of construction, It can affect the consistency of mortar based on gypsum, cement and lime to improve the workability and sag resistance of mortar.Starch ether usually
Used in conjunction with unmodified and modified cellulose ethers.