Coating classification: non-ionic polyurethane associated thickener

Core tip: Product Introduction: Polyurethane thickener, referred to as Heru, is a hydrophobic modified ethoxy polyurethane water-soluble polymer, which belongs to non-ionic Association thickener There is no doubt that this is the oldest synthetic associative thickener, which was used in leather processing and textile printing pastes in the early 1960s With the gradual substitution of water-based coatings for solvent-based coatings, HEUR is widely used in water-based decorative paint, industrial paint and two-component aqueous polyurethane system in recent years It is usually connected to the hydrophobic block by the hydrophilic polyethylene glycol through the ammonia ester or diamine ester group, and the hydrophobic group can be set Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Paint Home News: Product Introduction: polyurethane thickener, referred to as Heru, is a hydrophobic modified ethoxy polyurethane water-soluble polymer, which belongs to non-ionic Association thickener There is no doubt that this is the oldest synthetic associative thickener, which was used in leather processing and textile printing pastes in the early 1960s With the gradual substitution of water-based coatings for solvent-based coatings, HEUR is widely used in water-based decorative paint, industrial paint and two-component aqueous polyurethane system in recent years Generally, the hydrophilic polyethylene glycol is connected to the hydrophobic block through the urethane or diamine ester group, and the hydrophobic group can be placed on the two sealing ends of the molecule, or block on the main chain or side chain Classification of water-based thickeners: Structure: HEUR consists of hydrophobic group, hydrophilic chain and polyurethane agent Hydrophobic groups play an association role and are the decisive factors of thickening, usually oil-based, octadecyl, dodecyl phenyl, nonylphenol group, etc Hydrophilic chain can provide chemical stability and viscosity stability Polyether is commonly used HEUR molecular chain is extended by polyurethane, which includes IPDI, TDI, hmdi, etc The structure of associated thickener is hydrophobic end sealing Mechanism: HEUR thickening mechanism in latex paint water phase: 1) molecular hydrophobic end is associated with latex particles, surfactants, pigments and other hydrophobic structures to form a three-dimensional network structure, which is also the source of high shear viscosity; 2) like surfactant, when the current concentration is higher than the critical micelle concentration, micelle is formed, and the medium shear viscosity (1-100s-1) is mainly dominated by it; 3) The hydrophilic chain of the molecule acts on the hydrogen bond of the water molecule to achieve the thickening result Application: HEUR type thickeners are widely used in waterborne paints and coatings They can be used in lacquer or low gloss paint They can also be used in varnish or varnish, such as wood flooring, printing inks, wood adhesives, label adhesives, wallpaper adhesives and even latex protections Product performance: the home of project coatings focuses on the news information and coatings of coatings, diatom mud, paint coatings, coating technology, fire retardant coatings, diatom mud, paint coatings, coating technology, decoration knowledge and decoration effect map of fire retardant coatings,