Hydroxyethyl cellulose is a white or slightly yellow, odorless and non-toxic fibrous or powdery solid. It is water-soluble cellulose ether belongs to non-ionic type. It can be widely used in suspension polystyrene, expandable polystyrene, latex and acrylic latex paint new, colorful paint, ion exchange resins, chemicals, oil drilling, construction materials, textile printing and dyeing, paper making machinery processing and other sectors.
As a non-ionic surface active agent, in addition to the functions of thickening, suspending, adhesive, floating of the film, film, dispersion, water and provide a protective colloid action, hydroxyethyl cellulose has the following uses:
1. Are added directly when grinding pigments: this method is the simplest one with the shortest time. Detailed steps are as follows: (1) adding appropriate purified water (under normal circumstances, glycols, wetting agents and film-forming agent are added at this time)to a high shear mixer vat (2) start slowly and continuous stir and slowing add hydroxyethyl cellulose (3) continue to stir until all particulate are thoroughly wetted (4) adding preservatives and PH adjusting agent (5) continue to stir and add other components in the formulation until hydroxyethyl cellulose is complete dissolute (solution viscosity increased significantly ), and ground to a paint so far.
2. Used when dubbed the standby purified porridge: as hydroxyethyl cellulose is a poor solvent to the organic solvent, so these organic solvents can be used to make porridge bar. The most common organic solvents such as ethylene glycol, propylene glycol, and a film-forming agent (such as hexylene glycol or diethylene glycol butyl acetate), ice is also a poor solvent, so the ice is often used to make porridge together with organic liquid. Porridge-like hydroxyethyl cellulose can be directly added to the paint. When in porridge shape, hydroxyethyl cellulose has fully been soaked up. When adding paint, they will immediately dissolve and start thickening effect. After adding hydroxyethyl cellulose still stirring constantly until completely dissolved, homogeneous. Porridge substance is generally six or ice water with an organic solvent mixture into hydroxyethyl cellulose, about 5-30 minutes later, hydroxyethyl cellulose hydrolysis and apparently they made up. General in summer water humidity is too high and it should not be used with porridge bar.
3. Used when making mother liquor: this method is first make the mother liquor with high concentration, then add latex paint, this method has the advantage of greater flexibility, the finished product can be directly added to paint, subject to proper storage. Method steps are similar with Method 1 (1) - (4) steps. The difference is not required to be a high shear mixer, with only some of the power sufficient to hold the fibers hydroxyethyl uniformly dispersed in the solution is Blenders available. Continue to stir until completely dissolved into a viscous solution. Things should be noted: fungicide must be added to mother liquor earlier.