How to use hydroxyethyl cellulose in latex paint?

Shandong chuangyao Biotechnology Co., Ltd. specializes in the production and operation of hydroxyethyl cellulose. It is a large-scale domestic manufacturer of hydroxyethyl cellulose. The recommended brands of paint emulsion paint are hec-30000 MPa. S and hec-60000 MPa. S. other brands need to be specifically communicated with the technical personnel of the manufacturer.

Application of hydroxyethyl cellulose in emulsion paint

1. Add directly when grinding pigment: this method is the simplest and takes a short time. The detailed steps are as follows:

(1) Add proper purified water into the drum of high strain cutting agitator (in general, glycol, wetting agent and film-forming agent are added at this time)

(2) Start stirring at low speed and add HEC slowly

(3) Continue mixing until all particles are wet

(4) Add mildew inhibitor, pH regulator, etc

(5) Stir until all the hydroxyethyl cellulose is completely dissolved (the viscosity of the solution increases significantly), then add other components in the formula, and stir until the paint is finished.

2. Preparation of mother liquor for standby use: this method is to prepare mother liquor with high concentration first, and then add it to 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, except that there is no need for high strain cutting agitator and only some agitators with enough power to keep the hydroxyethyl fiber uniformly dispersed in the solution. Continue to stir until completely dissolved into a viscous solution. It should be noted that mould inhibitor must be added to mother liquor as early as possible.

3. Preparation of congee like phenology: because organic solvents are bad solvents for hydroxyethyl cellulose, these organic solvents can be used to prepare congee like substances. Ice water is also a bad solvent, so ice water is often used with organic liquid to prepare congee. The congee like hydroxyethyl cellulose can be directly added to the paint. Hydroxyethyl cellulose has been fully bubbled in congee. When the paint is added, it will dissolve immediately and play a thickening role. After adding, it must be stirred until the hydroxyethyl cellulose is completely dissolved and even. Generally, congee is composed of six parts of organic solvent or ice water and one part of hydroxyethyl cellulose. After about 5-30 minutes, hydroxyethyl cellulose will hydrolyze and swell obviously. In summer, the humidity of general water is too high, so it is not suitable to equip with congee.

1. Precautions when preparing hydroxyethyl cellulose mother liquor as hydroxyethyl cellulose is a treated powder particle, it is easy to operate and dissolve in water as long as the following precautions are taken.

2. As far as possible, add mildew inhibitor in advance.

3. Before and after adding hydroxyethyl cellulose, it must be stirred continuously until the solution is completely transparent and clear.

4. It must be sifted into the mixing drum slowly, and it is not allowed to add massive or spherical hydroxyethyl cellulose directly into the mixing drum.

5. It is necessary to pay special attention to the obvious relationship between water temperature and pH value of water on the dissolution of hydroxyethyl cellulose.

6. When using high viscosity hydroxyethyl cellulose, the concentration of mother liquor should not be higher than 2.5-3% (by weight), otherwise the mother liquor is difficult to operate.

7. Do not add some alkaline substances into the mixture before hydroxyethyl cellulose powder is soaked by water. It is helpful to increase the pH value after being soaked.

Factors affecting viscosity of emulsion paint

1. Whether the sequence of adding thickener is appropriate in the process of paint making.

The more air bubbles remained in the paint, the higher the viscosity.

3. Whether the amount of surfactant and water in the paint formulation is consistent.

4. The dosage of other natural thickeners in the paint formula and the dosage ratio with hydroxyethyl cellulose.

Because of over mixing, the humidity is too high when dispersing.

6 in the synthesis of latex, the amount of residual catalyst and other oxides.

The erosion of thickeners by microorganisms. Shandong chuangyao Biotechnology Co., Ltd

Please pay more attention to Shandong chuangyao Biotechnology Co., Ltd. which is the manufacturer of hydroxyethyl cellulose.


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