Starch ether is produced through chemical modification, including HPS, CMS and etc.
Hydroxypropyl starch ether is an non-ionic water-soluble starch ether, it can change rheology of dry-mixed mortar and is very popular in construction filed for thickening and improving the workability.
Production process:
Reaction equation:
Side reaction:
Application recommendation：
- Wall putty
- Plaster
- Render
- Tile adhesive
- Tile grouts
- EIFS / ETICS
- Water-proofing mortar
- Stucco
- Joint filler
Function of HPS
The most important function of HPS is to adjust the rheology of mortar. When it is sheared, its consistency will decrease, and it will restore its original consistency once the shear is lost.
And it also shows a synergy with other additives like cellulose ether.
Performance in mortar:
- Extend open time;
- Improve anti-sagging;
- Improve workability;
- Thickening ability;
- Improve anti-slip ability;
- Increase yield value。
Products recommendation：
| Grade | Feature | Recommendation |
| STARGEL®ST300 | Good workability | Plaster,putty |
| STARGEL®ST500 | Balance between workability and anti-slip | Plaster,putty,tile adhesive |
| STARGEL®ST600 | Good anti-slip | Tile adhesive |
Stargel ST serise is high-quality and cost-effective HPS. It plays an important role in construction field. Starch ether appears in most formulas of high quality products like C2TES1. Celotech can supply the most suitable products for you to choose.
Hydroxypropyl Starch Ether (HPS) is a versatile and essential additive in the construction industry, offering significant improvements in the performance of dry-mixed mortars. Its ability to adjust rheology, enhance workability, extend open time, and improve anti-sagging and anti-slip properties makes it an indispensable component in products like wall putty, plaster, tile adhesives, and more. With a range of grades such as STARGEL® ST300, ST500, and ST600, HPS delivers tailored solutions to meet specific performance requirements. Whether you’re working on plastering, tiling, or waterproofing, incorporating HPS ensures higher quality, better consistency, and increased efficiency in construction applications. Celotech provides a reliable source of high-quality HPS products, making it easier for you to select the right solution for your needs.
