Hydroxyethyl methylcellulose can be used as hydroidal protective agent, emulsifying agent and dispersing agent due to the surface active function of aqueous solution.Examples of its application are as follows:（HEC）
1. Effect of hydroxyethylmethyl cellulose on cement properties.（HEC）
Hydroxyethylmethyl cellulose is a nonodorless, odorless, non-toxic white powder that dissolves in cold water to form a transparent, viscous solution.
It has the characteristics of thickening, adhesion, dispersion, emulsification, film formation, suspension, adsorption, cemelling, surface activity, maintaining water, and protecting colloids.（HEC）
Because the aqueous solution has a surfactant function, it can act as a colloidal protective agent, emulsifier and dispersant.Hydroxyethylmethyl cellulose solution is a high efficiency water retaining agent.
2. Prepare a relief paint with high flexibility, Made from the following weight parts of raw materials: （HEC）
deionized water 150-200g; Pure C emulsion 60-70g; Heavy calcium: 550-650g; Talc powder 70-90g; Hydroxyethyl methyl cellulose aqueous solution 30-40g; Lnocellulosic aqueous solution 10-20g; Membrane-forming additives: 4-6g; Antiseptic and fungicide 1.5-2.5g; Dispersant 1.8-2.2g; Moisture agent 1.8-2.2g; Thickener, 3.5-4.5g; Ethylene glycol 9-11g; The hydroxyethylmethylcellulose solution is made of 2-4% hydroxyethylmethyl cellulose dissolved in water; The aqueous lignocellulose solution is made of 1 – 3% lignocellulose dissolved in water.