Hydroxypropyl methylcellulose for construction

 Properties of hydroxypropyl methylcellulose for construction

is soluble in water and some organic solvents. It can be dissolved in cold water. Its highest concentration is only determined by the viscosity. The solubility changes with the viscosity. The lower the viscosity, the greater the solubility.

Hydroxypropyl methyl cellulose for salt-resistant construction is a non-ionic cellulose ether and not a polyelectrolyte. Therefore, it is relatively stable in aqueous solutions when metal salts or organic electrolytes are present, but excessive addition of electrolytes can cause gel And precipitation.

Surface activity As the aqueous solution has surface activity, it can be used as a colloidal protective agent, emulsifier and dispersant.

When heated to a certain temperature, the hydroxypropyl methylcellulose aqueous solution for thermal gel construction becomes opaque, gels, and precipitates, but when it is continuously cooled, it returns to the original solution state, and this condensation occurs. The temperature of glue and precipitation mainly depends on their lubricants, suspending aids, protective colloids, emulsifiers and so on.

Mildew resistance It has good anti-mold ability and good viscosity stability during long-term storage.

PH stability The viscosity of the hydroxypropyl methylcellulose aqueous solution for construction is almost not affected by acid or alkali, and the PH value is relatively stable in the range of 3.0 to 11.0.

Shape retention Since the highly concentrated aqueous solution of hydroxypropyl methylcellulose for construction has special viscoelastic properties compared with the aqueous solutions of other polymers, its addition has the ability to improve the shape of extruded ceramic products.

Water retention The hydrophilicity of hydroxypropyl methylcellulose for construction and the high viscosity of its aqueous solution make it a highly effective water retention agent.

Other characteristics Thickener, film-forming agent, adhesive, lubricant, suspending agent, protective colloid, emulsifier, etc.

The advantages of building hydroxypropyl methylcellulose in the field of construction

performance:

1. It is easy to mix with dry powder formula.

2. It has the characteristics of cold water dispersion.

3. Effectively suspend solid particles and make the mixture more smooth and uniform.

mix:

1. The dry blend formula containing hydroxypropyl methylcellulose for construction can be easily mixed with water.

2. Get the desired consistency quickly.

3. The dissolution of cellulose ether is faster and without clumps.

Construction:

1. Improve lubricity and plasticity to enhance workability and make product construction more convenient and faster.

2. Enhance water retention characteristics and extend working time.

3. It helps prevent the sag of mortar, mortar and tiles. Extend the cooling time and improve work efficiency.

4. Improve the bonding strength of tile adhesives.

5. Enhance the anti-cracking shrinkage and anti-cracking strength of mortar and board joint filler.

6. ​​Improve the air content in the mortar to greatly reduce the possibility of cracks.

7. It can enhance the sag resistance of the tile adhesive.

8. The effect is better when used together with the starch ether of Boyi Chemical!

Application of hydroxypropyl methylcellulose for construction in the field of construction

Water-resistant putty for internal and external walls:

1. Excellent water retention, which can prolong construction time and improve work efficiency. High lubricity, making construction easier and smoother. Provides a smooth and uniform texture, making the putty surface smoother.

2. The high viscosity, generally 100,000~150,000, makes the putty more adhesive to the wall.

3. Improve shrinkage resistance and crack resistance, and improve surface quality.

Reference dosage: 0.3~0.4% for internal walls; 0.4~0.5% for external walls;

External wall insulation mortar

1. Enhance the adhesion to the wall surface, and enhance the water retention, so that the strength of the mortar can be improved.

2. Improve lubricity and plasticity to improve construction performance. The combination of Shenglu starch ether can strengthen the mortar, which is easier to construct, save time and improve cost efficiency.

3. Control the infiltration of air, thereby eliminating the micro-cracks of the coating and forming an ideal smooth surface.

Reference dosage: general mortar 0.1~0.3%; insulation mortar 0.3~0.6%; interface agent: 0.3~0.6%;

 Gypsum plaster and plaster products

1. Improve the uniformity, make the plaster easier to coat, and at the same time improve the anti-sagging ability and enhance the fluidity and pumpability. Thereby improving work efficiency.

2. High water retention, prolong the working time of the mortar, and produce high mechanical strength during solidification.

3. By controlling the uniformity of the mortar, a high-quality surface coating is formed.

Reference dosage: gypsum plaster 0.1~0.3%; gypsum product 0.1~0.2%;

Cement-based plaster and masonry mortar

1. Improve the uniformity, make the insulation mortar easier to coat, and improve the anti-sagging ability.

2. High water retention, extending the working time of the mortar, improving work efficiency, and helping the mortar to form high mechanical strength during the solidification period.

3. With special water retention, it is more suitable for high water absorption bricks.

Reference dosage: about 0.2%

 Panel joint filler

1. Excellent water retention, which can extend the cooling time and improve work efficiency. High lubricity, making construction easier and smoother.

2. Improve shrinkage resistance and crack resistance, and improve surface quality.

3, provide a smooth and uniform texture, and make the bonding surface stronger.

Reference dosage: about 0.2%

Tile adhesive

1. Make the dry mix ingredients easy to mix without causing clumps, thus saving working time. And make the construction faster and more effective, which can improve the workability and reduce the cost.

2. Improve the efficiency of tiling by extending the cooling time.

3. Provides excellent adhesion and high slip resistance.

Reference dosage: about 0.2%

Self-leveling floor material

1. Provide viscosity and can be used as anti-settling aid.

2. Enhance fluidity and pumpability, thereby improving the efficiency of floor paving.

3. Control water retention, thereby greatly reducing cracks and shrinkage.

Reference dosage: about 0.5%

Water-based paint and paint remover

1. Extend the shelf life by preventing solid precipitation. It has excellent compatibility with other components and high biological stability.

2. Dissolves quickly without clumps, which helps simplify the mixing process.

3. Produce favorable fluidity, including low spatter and good leveling, which can ensure excellent surface finish and prevent paint from running down.

4. Enhance the viscosity of water-based paint remover and organic solvent paint remover so that the paint remover will not flow out of the surface of the workpiece.

Reference dosage: about 0.05%

Extrusion of concrete sheet

1. Enhance the workability of extruded products, with high bonding strength and lubricity.

2. Improve the wet strength and adhesion of the sheet after extrusion.

Reference dosage: about 0.05%