Product Description
Hydroxypropyl Starch Ether (HPS) is a functional additive used in cement- and gypsum-based dry-mix mortars to improve workability, consistency, thickening performance, and sag resistance. When combined with cellulose ether, HPS can complement its performance, helping optimize mortar application properties and improve adhesion to substrates.
HPS is typically manufactured from starch, such as corn starch, through chemical modification and hydroxypropyl etherification, followed by drying and other processing steps. Supplied as a fine white powder, it is designed for incorporation into dry-mix mortar formulations. Compared with native starch and other modified starches, HPS offers distinct functional properties that make it suitable for a range of construction material applications. Its performance depends on the product grade, dosage, and overall formulation.
Product Parameters
| English Name | Hydroxypropyl starch |
| English Synonyms | Starchhydroxypropylated;Starch 2-hydroxypropyl ether;Hydroxypropyl starch ether;5-[6-[[3,4-dihydroxy-6(hydroxymethyl)-5-methoxyoxan-2-yl]oxymethyl]-5-[3-(2,3-dihydroxy-2-methylpropoxy)-4-hydroxy-6-(hyd roxymethyl)-5-methoxyoxan-2-ylloxy-3,4-dihydroxyoxan-2-yl]oxy-6-(hydroxymethyl)-2-methyloxane-3,4-d iol;HYDROXYPROPYL STARCH;2-hydroxypropyl starch;Hydroxypropylstrke;Starch, hydroxypropyl ether |
| CAS Number | 9049-76-7 |
| Molecular Formula | C24H42021 |
| Molecular Weight | 666.57768 |
| solubility | Practically insoluble in cold water and in ethanol (96 per cent). |
| InChIKey | BYSGBSNPRWKUQH-XPGIZXPCNA-N |
| EPA Substance Registry System | Starch, 2-hydroxypropyl ether (9049-76-7) |
| Cosmetic Ingredient Efficacy | Viscosity control |
| Cosmetic Ingredient Evaluation | Hydroxypropyl starch (9049-76-7) |
Application Scenarios
Hydroxypropyl Starch Ether (HPS) is a modified starch-based additive typically derived from corn starch through hydroxypropyl etherification and subsequent processing, including drying. Supplied as a fine white powder, HPS offers functional properties distinct from those of native starch and other modified starches. It is used in construction material formulations, particularly cement- and gypsum-based dry-mix mortars, to help improve workability, thickening performance, and application characteristics. Its solubility and functional performance may vary depending on the product grade and formulation conditions.
