Application of HPMC cellulose ether in waterproof putty

HPMC (hydroxypropyl methylcellulose), as an important cellulose ether, plays a key role in the formulation of waterproof putty. Waterproof putty is used on walls and ceilings of buildings and requires excellent waterproofing and construction performance to ensure the durability and aesthetics of the building in humid environments. HPMC greatly improves the overall performance of waterproof putty through its unique physical and chemical properties.

HPMC mainly acts as a thickener and water-retaining agent in waterproof putty. It can significantly increase the viscosity of the putty, making it smoother and easier to apply during construction and reducing sag.

At the same time, HPMC has a strong water retention capacity. During the drying process of putty, it can lock in moisture and prevent the putty layer from losing water too quickly, thus effectively avoiding the problems of cracking and shedding. This feature is particularly important for waterproof putty applied in alternating dry and humid environments. It can ensure the density and uniformity of the putty layer and enhance its waterproof effect.

HPMC cellulose ether also improves the construction performance of putty, making the application, leveling and sanding process of putty smoother. It gives the waterproof putty excellent construction lubricity and a long opening time, ensuring that construction workers can complete the operation within a reasonable time without affecting the construction quality due to the putty drying too quickly.

The use of HPMC in waterproof putty also improves the crack resistance and weather resistance of the putty. The uniform coating film formed by HPMC can effectively prevent the penetration of moisture, protect the wall from water vapor erosion, and at the same time improve the toughness of the coating to prevent cracking caused by temperature changes or structural stress.