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How to add hydroxyethyl cellulose to paint latex paint and what role can it play?

Update:How to prepare the hydroxyethyl cellulose mother liquor should pay attention, then ZHEJIANG RUICO ADVANCED MATERIALS CO....
Summary:06-05-2022
How to prepare the hydroxyethyl cellulose mother liquor should pay attention, then ZHEJIANG RUICO ADVANCED MATERIALS CO., LTD. will discuss with you, because hydroxyethyl cellulose is a processed powder, just pay attention to the following matter, it is easy to handle and dissolve in water. Before and after adding hydroxyethyl cellulose, it must be kept stirring until the solution is completely transparent and clear. It must be sieved into the mixing barrel slowly, and do not directly add the hydroxyethyl cellulose that has been formed into lumps and balls into the mixing barrel. Water temperature and pH value in water have a significant relationship to the dissolution of hydroxyethyl cellulose, and special attention should be paid. Do not add some alkaline substance to the mixture before the hydroxyethyl cellulose powder is soaked with water. Raising the pH only after wetting will aid in dissolution. As far as possible, add antifungal agents as early as possible. When using high-viscosity hydroxyethyl cellulose, the concentration of the mother liquor should not be higher than 2.5-3% (by weight), otherwise the mother liquor is difficult to handle.




How to use hydroxyethyl cellulose in latex paint:
One. Add directly when grinding the pigment: This method is the easiest and takes less time. The detailed steps are as follows:
1. Add appropriate purified water to the large bucket of the high-cut mixer (generally, ethylene glycol, wetting agent and film-forming agent are added at this time)
2. Start stirring continuously at low speed and slowly add hydroxyethyl cellulose
3. Continue stirring until all particles are soaked through
4. Add antifungal agent, PH adjuster, etc.
5. Stir until all the hydroxyethyl cellulose is completely dissolved (the viscosity of the solution increases significantly) before adding other components in the formula, and grind until it becomes a paint.

Two. Equipped with mother liquor for use: This method is to first prepare a mother liquor with a higher concentration, and then add it to the latex paint. The advantage of this method is that it has greater flexibility and can be directly added to the finished paint, but it must be properly stored. The steps and methods are similar to the steps (1)-(4) in Method 1, the difference is that there is no need for a high-shear agitator, and only some agitators with sufficient power to keep the hydroxyethyl fibers uniformly dispersed in the solution are used. Can. Continue constant stirring until completely dissolved into a viscous solution. It should be noted that the antifungal agent must be added to the mother liquor as soon as possible.

Three. Preparation for porridge phenology: Since organic solvents are poor solvents for hydroxyethyl cellulose, these organic solvents can be used to prepare porridge. The most commonly used organic solvents such as ethylene glycol, propylene glycol, and film-forming agents (such as hexylene glycol or diethylene glycol butyl acetate), ice water is also a poor solvent, so ice water is often used together with organic liquids. To prepare porridge. The porridge-like hydroxyethyl cellulose can be directly added to the paint. The hydroxyethyl cellulose has been fully swollen in the porridge. When added to the paint, it immediately dissolves and thickens. After adding, it must be stirred continuously until the hydroxyethyl cellulose is completely dissolved and uniform. Generally, the porridge is mixed with six parts of organic solvent or ice water and one part of hydroxyethyl cellulose. After about 5-30 minutes, the hydroxyethyl cellulose will be hydrolyzed and swelled obviously. In summer, the humidity of the general water is too high, and it is not suitable to be used for porridge.

Four. Matters needing attention when preparing hydroxyethyl cellulose mother liquor Since hydroxyethyl cellulose is a processed powder and granular material, as long as the following matters are noted, it is easy to operate and dissolve in water.
1. Before and after adding hydroxyethyl cellulose, it must be stirred continuously until the solution is completely transparent and clear.
2. It must be sieved into the mixing barrel slowly, and do not directly add the hydroxyethyl cellulose that has been formed into lumps and balls into the mixing barrel in large quantities or directly.
3. The pH value of water temperature and water has a significant relationship with the dissolution of hydroxyethyl cellulose, so special attention should be paid to it.
4. Do not add some alkaline substances to the mixture before the hydroxyethyl cellulose powder is soaked with water. Raising the pH only after wetting will aid in dissolution.
5. As far as possible, add antifungal agent as early as possible.
6. When using high-viscosity hydroxyethyl cellulose, the concentration of the mother liquor should not be higher than 2.5-3% (by weight), otherwise the mother liquor is difficult to operate.