Hydroxypropyl Starch Ether (HPS) is a modified starch derivative widely used in building materials and has a variety of functions and uses.
Basic properties of hydroxypropyl starch ether
Hydroxypropyl starch ether is a non-ionic starch ether produced by the reaction of starch and propylene oxide. A hydroxypropyl group is introduced into its chemical structure, giving it better solubility and stability. Hydroxypropyl starch ether is usually in the form of white or off-white powder and has good water solubility, thickening, cohesiveness, emulsification and suspending properties.
The main role of hydroxypropyl starch ether in construction
Thickening and water retention
In building materials, hydroxypropyl starch ether is mainly used as a thickener and water-retaining agent. It can significantly increase the viscosity of mortar, putty and other materials and improve their construction performance. Hydroxypropyl starch ether can effectively increase the water retention rate and prevent water from evaporating too quickly, thereby extending the construction time and improving the material’s operability and plasticity.
Improve construction performance
Hydroxypropyl starch ether can significantly improve construction performance, including improving the material’s resistance to slipping and sagging, making it less likely to sag during construction on vertical surfaces. It can also improve the flow resistance and delamination resistance of the mortar, making the mixture more uniform and the construction smoother.
Enhance bond strength
As an excellent adhesive, hydroxypropyl starch ether can significantly improve the bonding strength between building materials and base materials. This is especially important for products that require high adhesion, such as tile adhesive, putty, and wall repair materials. It can improve the peeling resistance and shear strength of the material, thereby enhancing the stability of the overall structure.
Improve crack resistance
Hydroxypropyl starch ether can improve the crack resistance of building materials. It can effectively disperse stress and reduce shrinkage and cracking of materials, thereby improving the durability of buildings. This is especially important for materials that require high crack resistance, such as waterproof mortar and exterior wall putty.
Improve rheological properties
Hydroxypropyl starch ether has good rheological properties and can maintain appropriate fluidity and operability of building materials during construction. This is especially important for products that require good fluidity, such as self-leveling mortars and spray materials. It can improve the flatness and surface finish of the material, making the construction effect more beautiful.
Improved water resistance and weather resistance
Hydroxypropyl starch ether can improve the water resistance and weather resistance of building materials, allowing them to maintain good performance in humid environments and extreme climate conditions. This is particularly important for materials that require high weather resistance, such as exterior wall coatings and exterior insulation systems. It can improve the material’s resistance to water erosion and extend its service life.
Application examples of hydroxypropyl starch ether
Tile glue
In ceramic tile adhesives, hydroxypropyl starch ether can improve the bonding strength and water retention of the product, making the ceramic tiles adhere more firmly to the substrate. At the same time, it can also improve construction performance and prevent tiles from sliding during construction.
Putty powder
In putty powder, hydroxypropyl starch ether can improve the thickening and operability of the product, making the construction smoother. It can also improve the crack resistance of putty and reduce cracking.
Self-leveling mortar
In self-leveling mortar, hydroxypropyl starch ether can improve the fluidity and self-leveling performance of the product, making construction more convenient and faster. At the same time, it can also improve the crack resistance and durability of the mortar.
waterproof mortar
In waterproof mortars, hydroxypropyl starch ether can improve the water resistance and weather resistance of the product, allowing it to maintain good performance in humid environments. It can also improve the bonding strength and crack resistance of the mortar and enhance the overall waterproofing effect.
As a multifunctional building material additive, hydroxypropyl starch ether has broad application prospects. It can significantly improve the performance of building materials, including thickening and water retention, improving bonding strength, improving construction performance, improving crack resistance, improving water resistance and weather resistance, etc. Through the rational application of hydroxypropyl starch ether, the quality and durability of construction projects can be greatly improved to meet the needs of modern buildings for high-performance materials.
Post time: Jul-20-2024