AnxinCel® HPMC in gypsum mortar

In construction, gypsum mortar is an important decorative and leveling material with good construction performance and environmental protection performance. However, pure gypsum mortar has problems such as poor adhesion, cracking, and low water retention, so it is necessary to optimize the performance through admixtures. Among them, AnxinCel® HPMC (hydroxypropyl methylcellulose) plays a key modification role in gypsum mortar as a high-performance cellulose ether additive.

1. Introduction to AnxinCel® HPMC

AnxinCel® HPMC is a non-ionic water-soluble polymer obtained by etherification modification of natural polymer cellulose. It has excellent solubility, viscosity adjustment and colloid protection ability. Its product models are rich in variety and can be applied to mortar systems under different construction conditions, especially in gypsum-based materials. It has a wide range of application value.

2. Performance and role in gypsum mortar

2.1. Improve water retention and prevent early water loss and cracking

Gypsum materials harden quickly, and during the construction process, it is easy to lose water too quickly due to water absorption by the base or evaporation from the environment, resulting in cracks and poor bonding. AnxinCel® HPMC can form a uniform and stable colloidal network structure in the mortar, effectively lock in moisture and improve water retention. The effects of improved water retention performance include:

Ensure the complete hydration reaction of gypsum and improve strength;

Reduce cracks caused by water loss and shrinkage;

Improve the bonding effect with the base.

2.2. Enhance construction performance and operation time

AnxinCel® HPMC adjusts the consistency and fluidity of the mortar to give the mortar a better construction feel and smooth operation. Specifically, it is manifested as:

Increase lubricity and reduce construction resistance;

Extend the operable time to facilitate adjustment by construction personnel;

Prevent sagging and dripping, especially suitable for wall or ceiling construction.

This performance is particularly important for large-scale construction and construction in high-temperature and dry environments, which can improve efficiency and reduce rework.

2.3. Adjust the consistency and thixotropy to improve the anti-sagging performance

AnxinCel® HPMC has significant thixotropy, that is, the viscosity decreases when stirring or pressurizing, and quickly returns to its original state after stopping stirring. This property makes the gypsum mortar fluid during construction, and it is not easy to flow or fall off after being attached to the wall, which greatly improves the convenience and quality of facade construction.

2.4. Promote uniform mixing and stability

HPMC has surface activity and can play a certain dispersing role during the stirring process, so that the various components in the dry mortar are more evenly mixed, effectively preventing the stratification and segregation of materials. Its stable molecular structure can also improve the storage stability of gypsum mortar and avoid water seepage and sedimentation problems.

2.5. Improve adhesion and surface quality

An appropriate amount of AnxinCel® HPMC can improve the bonding strength between gypsum mortar and the base or covering material, which helps the mortar to fit firmly after construction and not fall off easily. At the same time, its improvement of the rheological properties of the slurry also helps to make the surface flat and smooth after application, improving the quality of the finished product.

3. Recommended dosage and application suggestions

The recommended dosage of AnxinCel® HPMC in gypsum mortar is usually 0.1%~0.3% (in dry powder). The specific dosage should be adjusted according to the product model, construction environment, and mortar system structure. The addition method is dry mixing with other dry powder raw materials to ensure mixing uniformity.

The application of AnxinCel® HPMC in gypsum mortar can significantly improve its key properties such as water retention, workability, thixotropy, anti-sagging and adhesion. As modern construction puts higher demands on mortar performance, HPMC, as a green, environmentally friendly and efficient additive, is becoming an indispensable and important component in gypsum mortar formulas. Relying on advanced R&D technology and strict quality control, the AnxinCel® brand provides a stable and reliable solution for the performance optimization of gypsum mortar products.