Application of carboxymethyl cellulose as a water-preserving agent In coatings

2020-03-21 13:19


Carboxymethyl Celluloseis known for its extensive performance advantages, making it a widely used itemin various industries, in which the product is widely used as a water retentionagent in coatings, not   only to improve the quality of the paint products, butalso to facilitate our use, so we need to have a detailed understanding of itsspecific applications for subsequent operations.

As a water- preserving agent of coating, imethyl cellulose cancontrol and regulate the degeneration of the coating, improve the waterretention value of the coating to prevent the migration of water-solubleadhesive, and its excellent film-forming properties, making the coatingparticularly suitable for the coating of the membrane transfer and scrapercoating when applying glue pressing, is more conducive to overcoming thescratchcause of measuring rods or scrapers, Make the coating surface appearuniform and smooth, avoiding the phenomenon of "orange peel", givingthe coating good optical properties, opacity, adequate surface strength andgood K-N values.

Carboxymethyl Cellulose is also used as an auxiliary adhesive anda large number of coating operations in the paper industry, it has a betterbonding force, each serving of Carboxymethyl Cellulose can replace 3-4 copiesof degenerative starch or soy casein, 1.5-2.0 servings of latex, can reduce thetotal amount of glue, is conducive to improve the solid content of coating.

Because Carboxymethyl Cellulose has a rigid cellulose main chain,in colloidal coatinghas has a large hydracy volume, so it is rightly consideredas the thickener of the coating. As thickeners, cellulose polymers can affectthe flocculation state of pigment particles, which affects coating structureand coating flow variability. The concentration between pigment particlesdepends on the interaction behavior of each component of the coating, such aspigments and adhesives, that is, the phenomenon of the bonding betweenparticles. Importantly, the adsorption of sodium methyl cellulose in thecoating greatly affects the structure of the coating and the binding force ofthe coating colloid.

Tosum up, as a water- preserving agent in the coating can increase the product'sfinish, flatness, opacity, thereby improving the use of the paint performanceand construction quality, not only that, Carboxymethyl Cellulose in differentcoatings can also be used as thickeners and adhesives, and thus widely used.