How to Choose Correct Cellulose Ethers for Putty Powders?

1. What are wall putty and its functions

Cellulose ethers play a significant role in the formulation of wall putty, a versatile application of cellulose ethers. Wall putty, a finely powdered substance, serves to smoothen surfaces and establish a level base for subsequent paint coats by filling in minor cracks and pores on walls. Additionally, it aids in rectifying any unevenness present on the wall surface. In essence, it is an indispensable preparatory step before commencing painting. Ideally, a minimum of two coats of putty should be applied for optimal results.

Characterized by high plasticity akin to clay, wall putty is augmented by the addition of cellulose ether. This additive enhances the functionality of wall putty, imparting improved strength and a superior finish to the surface.

2. Functions of cellulose ethers for putty

Cellulose ether is a non-ionic semi-synthetic polymer derived from cellulose, available in two main types: water-soluble and solvent-soluble. It serves diverse functions and finds utility across various industries. In the chemical sector, cellulose ethers act as thickeners, leveling agents, water-retaining agents, binders, and film formers. They are also employed as suspension aids, surfactants, lubricants, protective colloids, emulsifiers, dispersing agents, and control release matrix materials, among others.

Due to its versatile properties, cellulose ethers are extensively utilized in a range of building materials and industries. In the realm of putty, cellulose ethers play crucial roles such as:

- Cellulose ether for wall putty improves the adhesion and mechanical properties of the putty

- Improves the solid force of the putty

- Gives Alkali resistance, wear-resistance, and improved flexural potency

- Improves the water and dispersion resistance of the putty

- Enhance the durability of the putty by improving impact resistance capacity

- Advance the water retention capacity of the putty

3. Effects of cellulose ethers with different viscosities on putty powders

Combining cellulose ether, organobentonite, and starch ether creates a specialized cellulose ether formulation for putty. Cellulose ether serves the dual purpose of water conservation and enhancing surface smoothness, particularly in batches where putty is applied for scraping purposes. The viscosity range, typically between 30,000 to 50,000 cps, plays a critical role in determining the structure and finish of the final product.

In both dry powder putty and putty paste formulations, modified methylcellulose and hydroxypropyl methylcellulose ether are utilized. Cellulose ether, specifically HPMC, contributes to water retention, lubrication, adhesion, and other essential functions in wall putty. A viscosity range of 30,000 to 60,000 cps is considered most suitable for achieving desired performance characteristics.

The viscosity requirements of cellulose ethers for putty vary depending on the specific formulation used, which can include ingredients such as light calcium, ash calcium, white cement, or gypsum powder. Different viscosity levels offer distinct effects:

- Low viscosity: Low viscosity cellulose ethers are characterized by poor water retention but are suitable for achieving smooth leveling of the putty surface.

- Medium viscosity: Cellulose ethers with a medium viscosity range of 75,000 to 100,000 cps are commonly employed in wall putty formulations to enhance water retention properties, resulting in improved performance.

- High viscosity: High viscosity cellulose ethers contribute to increased putty viscosity, helping to prevent sagging during application and facilitating easier wall scraping, thus saving time and effort.

4. Cellulose Ether Products for Putty Powders

4.1 Cement-based Putty Applications

In cement-based putty formulations, the incorporation of our cellulose ethers for putty products can enhance product performance in the following ways:

1. Enhanced water retention and consistency.

2. Improved adhesion and cohesion.

3. Enhanced workability and processability.

4. Increased hydrophobicity.

4.2 For Gray Calcium-based Putty

Incorporating our cellulose ethers for putty application can enhance several key properties:

- Enhanced water retention

- Improved sag resistance

- Enhanced workability

- Improved processability

- Enhanced adhesion and cohesion

4.3 For Gypsum-based Putty

Our cellulose ether products are specifically designed additives that enhance the performance and processing characteristics of gypsum-based products in the following ways:

- Enhanced water retention, providing extended working time

- Optimized product consistency and rheology

- Reduction in lump formation

- Improved adhesion and sag resistance

For further information or to request a sample of our cellulose ethers for putty, please don't hesitate to contact our team. We're here to help you improve your project!