Coating technology: active anchored block polymers are widely used in Waterborne Coatings

It is suggested that the application of active anchored block polymer in the aqueous dispersion of organic pigment is an environmentally friendly product with rapid development The dispersion stability of organic pigment directly affects the application performance of the product Due to the weak binding force of lipophilic groups on the surface of pigment particles with low polarity in small molecular surfactants, it is easy to desorb from the surface of pigment particles, resulting in the re flocculation of pigment particles; at the same time, the hydrophilic groups can not produce enough stable effect, so the pigment dispersion system can not exist stably In recent years, polymer dispersants have been developed Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Home of coatings: the application of active anchored block polymers in the aqueous dispersion of organic pigments waterborne coatings are rapidly developing environmentally friendly products The dispersion stability of organic pigments directly affects the application performance of products Due to the weak binding force of lipophilic groups on the surface of pigment particles with low polarity in small molecular surfactants, it is easy to desorb from the surface of pigment particles, resulting in the re flocculation of pigment particles; at the same time, the hydrophilic groups can not produce enough stable effect, so the pigment dispersion system can not exist stably In recent years, a polymer dispersant has been developed In the 1980s, DuPont company used group transfer polymerization to synthesize methacrylate hydrophilic oleophilic block polymer with good dispersing effect on organic pigments in water BASF company has synthesized efka 4585 by controlled free radical polymerization technology, and BYK has launched the third generation of wetting dispersant disperbyk 2010 and 2015 based on controlled polymerization technology The molecular chain of the water-based polymer dispersant of organic pigment should contain anchoring group and stabilizing part, and the anchoring group and stabilizing part should be organized reasonably The anchoring group part of dispersant is to provide enough strong binding force with organic pigment, and the dispersant molecules are not easy to fall off from the surface of pigment, which is the premise for the dispersant to play its role The action of anchoring group and organic pigment is as follows: 1 The action is to stabilize pigment particles dispersed by mechanical force through electrostatic repulsion and space stabilization The stable part should not only play a stable role, but also have good compatibility with film-forming materials If the compatibility is not good, the color paint may appear floating, blooming, flocculation, and defects on the surface of the paint film after drying 2 Anions and cations can stabilize pigment particles by electrostatic repulsion, but they are not compatible with hydrophobic film-forming substances It can be seen that ion stable groups are difficult to give consideration to excellent stability and good compatibility, and they are not suitable for multiple use in aqueous dispersants of organic pigments Long chain polyether, as a stable group, can maximize the compatibility with the film-forming resin, but the stability effect is not as good as the ion group 3 Compared with random copolymers, block or graft copolymers can play the role of anchoring group and stabilizing group in dispersants to the greatest extent Application of active anchored block polymer in aqueous dispersion of organic pigment Application of active anchored block polymer in aqueous dispersion of organic pigment the block polymer dispersant hta10 (structure as shown in Figure 1) was synthesized by using reversible activation deactivation free radical polymerization process of Hantai company, which can provide space electrostatic double stability for dispersed organic pigment particles in aqueous system The dispersing effect of dispersant HT A10 on organic pigments such as phthalocyanine blue (Pb 15:3), Pigment Red 254 and benzimidazolone yellow (py 154) was tested The test results showed that HT A10 was a high performance water dispersing agent Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,