Classification and characteristics of waterborne coatings - waterborne polyurethane coatings Polyurethane is a general term for a class of macromolecular compounds having a carbamate structure in a molecular structure, and is usually produced by a polyaddition reaction of a diisocyanate and a polyol. In view of the variety of isocyanates and polyols, the resulting polyurethanes can range from soft to hard, from brittle to tough, from highly elastic to rigid in a variety of forms. Polyurethane coatings also have a wide range of performance adjustments.Depending on the type of isocyanate used to prepare the polyurethane, the polyurethane emulsion and the corresponding lacquer can be classified into two major categories, aliphatic and aromatic.The aliphatic paint film has excellent weather resistance and yellowing resistance, and can be used as an outdoor decorative paint; aromatic waterborne polyurethane is mostly used for interior decoration paint.The polyol used is a polyether polyol, a polyester polyol, a polyolefin polyol, etc.,thus, the title of polyether polyurethane waterborne coating, polyester polyurethane waterborne coating, etc. A hydrophilic group or a hydrophilic segment must be introduced during the synthesis of the aqueous polyurethane.The most common hydrophilic groups are anionic carboxylic acid groups and sulfonic acid groups; macromolecular backbones and side chains may also have cationic groups such as quaternary ammonium ions; or nonionic polyoxyethylene long segments and The hydrophilic group hydroxymethyl group, the corresponding aqueous polyurethane is called anionic, cationic and nonionic.The particle size obtained by polymerization is polyurethane emulsion and polyurethane dispersion (PUD). The latter usually has a nanometer particle size, and the appearance is translucent or completely transparent. It is one of the best waterborne wood lacquer bases. It is specifically referred to as a nanoemulsion to distinguish it from a normal emulsion that is white in appearance. Waterborne polyurethane has excellent flexibility after film formation. It is often blended with a relatively rigid acrylic emulsion. The obtained waterborne wood lacquer has the advantages of both, especially in the film formation at lower temperatures. Better paint film hardness.A better method is to introduce an acrylic monomer in the process of preparing the polyurethane dispersion to form a core-shell structured particle in which the polyacrylate is a core and the polyurethane is a shell.This polyurethane-acrylic dispersion (PUA) is considered to be a fourth-generation polyurethane dispersion, specifically called a hybrid , which is better than a blend of acrylic emulsion and polyurethane dispersion, mainly in distribution. The paint is more stable, has better low-temperature film formation, no stickiness, high hardness, good flexibility, good adhesion, etc., and has been widely used. The aliphatic polyurethane dispersions represented by Sinograce Chemic...

Classification and characteristics of waterborne coatings - Waterborne acrylic coatings The emulsifier that USES when polymerization can be anionic, also can be nonionic or cationic, corresponding latex and the lacquer that make also can call anionic, nonionic or cationic. Acrylic waterborne wood lacquer is a variety of applications that have been used earlier and are still in large quantities. Since the beginning of the widespread introduction of acrylic architectural latex paints in the 1970s, waterborne acrylic wood lacquers have also appeared on the market. Acrylic emulsion is formed by polymerization of vinyl monomers with acrylate monomers as main monomers. Various additives such as an emulsifier, a stabilizer, and a pH adjuster are added during the polymerization, and the system is quite complicated. The distribution of hard and soft chain segments of polymer molecules in emulsion particles can be controlled by using different monomers, adjusting the dosage and changing the feeding method, so as to obtain emulsions with different vitrification temperature (Tg) or different minimum film-forming temperature (MFFT). The emulsifier used in the polymerization may be anionic or nonionic or cationic, and the corresponding emulsion and the resulting lacquer may also be referred to as anionic, nonionic or cationic. Acrylic emulsion is obtained by polymerization of acrylic monomer only, and the paint is called pure acrylic water paint. Other vinyl monomers can be added to modify the emulsion during polymerization. For example, styrene can be added to improve the hardness of paint film and reduce the cost. Fluorine-containing and silicon-containing monomers were introduced to improve the surface properties of the film, reduce the surface free energy of the film, and improve the hydrophobicity and stain resistance. Thus the production of benzene acrylic water based paint, fluorocarbon water based paint, silicon acrylic water based paint and other varieties. The paint film made of acrylic emulsion has good weather resistance, is not easy to yellow, has high hardness and good gloss. However, its main disadvantage is that the anti-blocking property is poor, and it is prone to hot sticky and brittle. When the hardness is too high, the low-temperature film forming property is not good, and it is difficult to carry out coating construction in winter. Further improving and improving the properties of the acrylic emulsion by self-cross linking polymerization, soap-free polymerization, core-shell polymerization, etc., especially using the core-shell technique, the emulsion particles are made into a hard core soft shell or a soft core hard shell structure, and even The multi-layer structure of soft and hard to meet the needs of different construction and use conditions. Sinograce Chemical produces water based coating,Water-based glue, polyurethane coating,Acrylic solution . visit us sinograce chemical: https://www.sinogracechem.com Get a Quote No...

Basic knowledge of water-based paint In order to provide product development support to a wide range of waterborne coating formulation technicians and waterborne coatings sales personnel, we hav collected and summarized a large number of domestic and international market trends and technical points. Visit our waterborne coatings knowledge base and you can see all of our formulation techniques and market analysis. Classification and characteristics of waterborne coatings: Waterborne coatings are called waterborne coatings or waterbased coatings.also known as water-based coatings. Aqueous coatings for wood finishing have a variety of classification methods, which are commonly classified by appearance, use, construction and curing methods, emulsion type, chemical structure, and equipmen methods. The most important ingredients of waterborne wood lacquers are the emulsions and the types of resins that make up the emulsion. The scientific method is to classify the chemical structure of the emulsion. According to the chemical structure, water-based wood lacquer can be divided into: water based acrylic paint, water-based polyurethane paint, waterborne alkyd paint, water-based epoxy paint, sol-gel paint, water-based light-curing paint. Sinograce Chemical produces water based coating,Water-based glue, polyurethane coating,Acrylic solution . visit us sinograce chemical: https://www.sinogracechem.com Get a Quote Now :sales@sinogracechem.com Telephone               :+86 0551 63459511

Future development of waterborne paint: In foreign countries, the application of waterborne paint is very wide, especially in the application of home decoration is very mature. In domestic already many enterprises are used at inside ark besmear, cane implement besmear is installed wait With the development of waterborne paint technology, waterborne paint will become a very important paint in furniture coating field. Conclusion: furniture manufacturing will face three trends in the future Environmental protection, environmental protection requirements will be increasingly high. Especially for export orders, merely meeting the requirements of national standards can no longer meet the requirements of customers. High efficiency, high efficiency of production, is one of the most stressed competitiveness of every enterprise. The shortage of labor force forces furniture manufacturing enterprises to improve the automation and assembly line operation of furniture manufacturing. Low cost, as the aggravate of competition, the profit of furniture manufacturing will be lower and lower, this asks manufacturing company should be good at using. New varieties and new technologies enable enterprises to effectively control the overall manufacturing cost.  Sinograce Chemical produces water based coating,Water-based glue, polyurethane coating , Acrylic solution .   visit us sinograce chemical: https://www.sinogracechem.com   Get a Quote Now :sales@sinogracechem.com   Telephone           :+86 0551 63459511