what is Hydroxypropyl Starch Ether (HPS) in construction chemical

what is HPS 

Hydroxypropyl Starch Ether (HPS) is another type of modified starch commonly used in the construction industry. It serves various functions in construction applications, primarily as a binder, thickener, and water retention agent.

What HPS function in construction

Binder: HPS acts as a binder in construction materials, such as dry mix mortars, adhesives, and coatings. It helps to improve the cohesion and strength of the materials by binding the individual components together. This results in enhanced adhesion, better workability, and improved overall performance.

Thickener: HPS provides viscosity and thickening properties to construction formulations. It increases the consistency and stability of liquid or semi-liquid products, such as tile adhesives, joint compounds, and plasters. The thickening effect of HPSE improves the sag resistance, ease of application, and open time of the products.

Water Retention: HPS exhibits excellent water retention capabilities. It can absorb and retain water, thereby extending the workable time of construction materials. This is particularly beneficial in dry mix mortars, where HPSE helps to prevent premature drying and allows sufficient time for proper application, setting, and curing.

Rheology Modifier: HPS acts as a rheology modifier, influencing the flow and viscosity characteristics of construction materials. It helps to control the rheological properties, such as flowability, spreadability, and leveling, ensuring optimal application and performance of the products.

Improved Adhesion: HPS enhances the adhesion properties of construction materials. It improves the bond strength between the material and various substrates, such as concrete, masonry, or wood. This leads to better adhesion, reduced shrinkage, and improved durability of the finished construction elements.

Crack Resistance: The use of HPS in construction formulations contributes to improved crack resistance. It helps to distribute stress evenly, reduce shrinkage, and minimize the risk of cracks developing in the applied materials, such as tile adhesives, renderings, or joint compounds.

Environmentally Friendly: HPS is derived from renewable sources, as it is made from starch obtained from crops like corn, potato, or tapioca. It is considered an environmentally friendly additive compared to synthetic alternatives.