High Viscosity HPMC for Mortar – Sag Resistance Additive

QingQuan Cellulose offers a high viscosity grade of Hydroxypropyl Methyl Cellulose (HPMC) specifically designed for mortar applications. This specialized additive provides excellent sag resistance on vertical surfaces, improves water retention for proper cement hydration, and enhances overall workability. It is ideal for tile adhesives, renderings, and repair mortars.

Basic Information

• Model NO.: Y-23

• Function: Thickening Agent

• Grade: Industrial Grade

• Solubility: Soluble in Water

• Viscosity: Recommended according to application

• MOQ: 1000 kg

• Purity: 99.99%

• Other Names: HEMC

• Advantages: High Water Retention

• Usage: Construction Material

• Transport Package: Waterproof Packing

• Origin: China, Hebei

• Trademark: QingQuan

• Production Capacity: 100,000 kg

• HS Code: 3912390000

• Specification: 25 kg/bag

Packaging & Delivery

• Package Size: 110.00cm × 110.00cm × 120.00cm

• Package Gross Weight: 1020.000 kg

Product Description

What is HPMC?

Hydroxypropyl Methylcellulose (HPMC) is a nonionic cellulose alkyl hydroxyalkyl mixed ether. It is produced from cellulose through alkalization, etherification, neutralization, and washing processes.

Chemical Formula

HPMC is a partially methylated and partially polyhydroxypropylated ether of cellulose. The production process starts with alkalizing cellulose, then reacting it with two etherifying agents: chloromethane and propylene oxide.

HPMC in Cement Mortar

HPMC plays many important roles in construction materials. It can be added to masonry mortar, plastering mortar, stucco, and plastering paste. Even a small amount brings major improvements. In cement‑based and gypsum‑based plasters, HPMC's water retention leads to higher bond strength and better hardness after curing.

High water retention allows cement to fully hydrate. This significantly increases bond strength, improves the tensile and shear strength of hardened mortar, and enhances workability and lubricity. Construction becomes easier and more efficient.

When using cement mortar, good water retention is critical. Bricks and walls absorb water quickly, and mortar often contains a high proportion of sand. Without proper water retention, bricks pull water out of the mortar too fast, causing partial water loss and incomplete cement hydration. Mortar made with sand, lime, and cement has naturally low bond strength, but adding cellulose ether dramatically improves it. Even under heavy load or horizontal stress, bond strength remains high.

Application Areas

Water‑Resistant Putty

In water‑resistant putty, cellulose ether retains water, improves adhesion, and adds lubricity. It prevents cracking or powdering caused by rapid water loss. It also reduces sagging during application, making construction smoother, less labor‑intensive, and more controllable.

Plastering

In gypsum‑based products, cellulose ether provides water retention, thickening, and lubrication. It also has a slight retarding effect, which solves bulging and cracking problems during construction. It prevents issues where initial strength fails to develop and extends working time.

Interfacial Agents

HPMC acts mainly as a thickener. It improves tensile and shear bonding strength, enhances surface coating, and increases adhesion.

Tile Adhesives

HPMC has strong water retention. During installation, tiles do not need to be soaked or pre‑wetted. Bonding strength improves significantly. The slurry is fine and uniform, allowing long working periods and convenient application.

Slurry Spraying

Spray slurry containing cellulose is suitable for protective work on interior and exterior walls, roofs, floors, and tunnels. Cellulose creates a combing effect within the spray material, increasing cohesion and adhesion. This effectively overcomes cracking problems and improves the impermeability and durability of the sprayed layer.

Daily‑Use Chemicals

HPMC is commonly used in cosmetics, shampoos, shower gels, and other daily chemicals. It has good thickening properties, forming a colloid by combining with water molecules. HPMC increases product consistency, making it easier to apply and use. It also has excellent moisturizing properties, absorbing and retaining water molecules.

Latex Paints

In the paint industry, HPMC serves as a film‑forming agent, thickener, emulsifier, and stabilizer. It gives paint films better abrasion resistance, uniformity, and adhesion, while also improving surface tension and pH stability.

Gypsum Decorative Materials

Gypsum products are lightweight, heat‑insulating, fire‑resistant, and help regulate indoor temperature. Adding HPMC allows gypsum to fully hydrate, ensures sufficient bonding force, and prevents cracks.

Logistics

Shipping costs depend on the shipping method you choose. Express shipping is the fastest but also the most expensive. Sea freight is the best solution for large quantities. We can only give you an exact shipping cost once we know the quantity, weight, and method. Please contact our sales team for more information.

FAQ

What are your prices?
Our prices may vary due to availability and other market factors. We will send you an updated price list after you contact us.

Can you provide documentation?
Yes, we can provide most documents, including certificates of analysis, conformity certificates, and other required export documents. We also offer complete after‑sales service to ensure you are satisfied with our products.

How is shipping cost calculated?
Shipping cost depends on the pickup method you choose. Express shipping is fastest but most expensive. Sea freight is best for large volumes. We can only give you the exact cost once we know the quantity, weight, and shipping details. Please contact our sales team.

I would like to know more details about the product.
Please contact our sales team for one‑on‑one answers.