Hydroxypropyl Starch Ether (HPS) is a chemically modified natural plant-based polymer designed to optimize the performance of dry-mix mortars and gypsum products. As a high-performance rheology modifier, it works synergistically with cellulose ethers (like HPMC or HEMC) to significantly improve the construction properties of building materials.

In the formulation of tile adhesives, wall putties, and masonry mortars, HPS is primarily used to provide instant thickening and superior anti-sagging properties. Its unique molecular structure allows it to modify the yield stress of the mortar, ensuring that heavy materials remain in place on vertical surfaces without slipping. Additionally, HPS imparts a distinct “lubricating” effect, which reduces the friction between the tool and the material, making the application process much smoother and less labor-intensive.

Beyond workability, HPS contributes to the overall stability of the system by preventing layering and bleeding of the mixture. Because it is highly compatible with other chemical additives and mineral binders, it allows for a more cost-effective formulation while maintaining high standards of crack resistance and surface quality.

Key Performance Attributes:

• Superior Anti-Sagging: Effectively prevents the sliding of tiles and sagging of thick-layer plasters.

• Enhanced Lubricity: Improves the “hand-feel” during construction, making spreading and leveling effortless.

• Synergistic Effect: Works in tandem with cellulose ethers to reach required viscosity at lower dosages.

• Reduced Water Demand: Helps maintain a stable consistency without needing excessive water, which can lead to higher final strength.

• Starch-Based Sustainability: Derived from renewable resources, providing an eco-friendly additive solution.