What is HPMC?

Hydroxypropyl Methylcellulose (HPMC) is a non-ionic cellulose ether derived from natural polymer cellulose. It is widely used in construction materials, including tile adhesive formulations, due to its excellent water retention, thickening, and bonding properties.

Why is HPMC Used in Tile Adhesive?

HPMC plays a crucial role in enhancing the performance of tile adhesives. Here are the primary benefits:

Water Retention:

HPMC ensures adequate moisture retention, properly hydrating cement and enhancing adhesive strength. This is especially important for extended open time and better workability.

Improved Workability:

It provides a smooth and uniform consistency, making the adhesive easier to spread and apply.

Enhanced Adhesion:

HPMC improves the bond between tiles and substrates, ensuring long-term durability.

Extended Open Time:

With HPMC, tile adhesives offer more time to adjust tiles after application, particularly useful in larger projects.

Sag Resistance:

It prevents tiles from slipping or sagging, even on vertical surfaces, ensuring precise placement.

Improved Flexibility and Crack Resistance:

The polymer modifies the adhesive’s flexibility and prevents cracks due to shrinkage or thermal stress.

Typical Application Areas:

Ceramic tiles

Porcelain tiles

Mosaic tiles

Stone materials

How to Use HPMC in Tile Adhesive?

HPMC is typically added during the dry-mixing stage of the tile adhesive manufacturing process. The dosage varies based on the specific formulation but usually ranges between 0.2% to 0.5% by weight.

Selecting the Right HPMC Grade:

When choosing HPMC for tile adhesive, consider the following parameters:

Viscosity: Higher viscosity grades improve sag resistance and water retention.

Particle Size: Finer particles dissolve more quickly and evenly in the mix.

Purity: High-purity HPMC ensures consistent performance and better stability.

Storage and Handling:

Store HPMC in a dry, cool place away from moisture.

Avoid exposure to direct sunlight and high temperatures.

Seal the packaging tightly after use to prevent contamination.

Conclusion

HPMC is an essential additive for tile adhesives, significantly improving their performance and application properties. Choosing the appropriate grade and dosage ensures optimal results, enhancing the durability and reliability of tiling projects.

Honglai is one of the major high-performance cellulose ether suppliers in China, with products including hydroxypropyl methylcellulose (HPMC), hydroxyethyl methylcellulose (MHEC), hydroxyethyl cellulose (HEC), and carboxymethyl cellulose (CMC). We supply various grades, degrees of substitution, and viscosities to the global market, suitable for different applications such as dry-mix mortar, paints and coatings, food, and skin care products.