Leather finishing is generally divided into bottom coating, middle coating and top coating three parts. The bottom coating requires strong adhesion, hiding power, good embossing formability and stereotyping, and the middle coating further covers and corrects the color, and finally achieves the visual and physical performance requirements through the top coating. With a specific top coat, the effect of extinction or light can be created. Waterborne polyurethane resin is the main material commonly used in leather coating. Its film forming performance is good, the bond is firm, and the coating has the characteristics of high wear resistance, high elasticity, water resistance, weather resistance, cold resistance, chemical resistance and so on. After finishing, the finished leather feels full and comfortable, which improves the grade of the finished leather and plays a role in protecting the leather. In order to meet customers' pursuit of quality and meet the most stringent environmental requirements, Sinograce Chemical launched two single-component waterborne polyurethanes, which are polymerized from aliphatic isocyanates. Excellent adhesion, good adhesion resistance, comfortable feel, no yellowing, good weather resistance. The products are widely used in leather shoes, belts, sofas and luggage leather and other leather products. For leather top finish to provide excellent gloss and permeability, excellent wear resistance and weather resistance. Product features and applications PU-403 PU-404 Very high gloss and excellent transparency Natural light, high penetration High hardness, high temperature and high humidity resistance High hardness, good flexibility Feel smooth, excellent water resistance Feel smooth, good weather resistance, solvent resistance Low odor, low VOC, no APEO, NMP and tin substances Low odor, low VOC, no APEO, NMP and tin substances If you want to know more about the product information, or need samples, please contact us.

1. Molecular structure The basic structure of acrylic resin contains a large number of carboxylic acid groups, and it is copolymerized with other monomers. This structure determines that the acrylic resin has a high cross-linking density and strength, which can effectively prevent the penetration and corrosion of chemical substances. 2. Physical properties Acrylic resin has excellent weather resistance, heat resistance and chemical resistance, and is not easy to be eroded by water, acid, alkali and other chemical substances. In addition, acrylic resin also has good wear resistance and UV resistance, which can effectively extend its service life and protect the surface of objects. 3. Application fields Acrylic resin is widely used in industry, construction, coatings, electronics and other fields. For example, acrylic resin can be used in the manufacture of anti-corrosion coatings, pipes, plastic products and other industrial supplies; In the field of electronics, acrylic resins are widely used in semiconductor packaging, optical devices and other aspects. In summary, acrylic resin has high crosslinking density and strength, excellent physical properties such as weather resistance, heat resistance and chemical resistance, which together make acrylic resin have excellent anti-corrosion ability. Sinograce Chemical production of a variety of water-based acrylic resin and polyurethane resin, welcome to consult

This is a modified acrylic copolymer emulsion without solid resin, specially designed for gravure and flexographic printing inks. It has a low viscosity and excellent pigment wetting and color development capabilities. It is highly compatible with the vast majority of resins on the market. Recommended application fields: surface printing of high-end paper and paper products, water-based ink for cigarette packaging, water-based varnish and clear lacquer, printing of flexible packaging, paper boxes, beverage packaging, etc. Product Feature ①Good resolubility, easy to wash, good cleaning, no blocking plate, no fog plate ②can be directly grinding color paste; Any proportion dilution with ethanol and methanol; Good wetting dispersion and grinding effect with various pigments ③Low odor, low VOC, suitable for a variety of printing applications with high environmental protection requirements. ④Good film formation, excellent temperature resistance, printing products do not backstick, heat resistance excellent ⑤Excellent compatibility with most water-based resins, no thickening, no reaction.

Coating industry: Strippable coating is a kind of functional coating for short-term protection of matrix surface, with good constructability, corrosion resistance and anti-friction properties, and is widely used in furniture, construction, machinery, Marine engineering and other fields. Solvent-based strippable coatings currently occupy a large market, with simple coating, good mechanical properties, short curing time and other characteristics, but the large use of organic solvents is undoubtedly one of its big shortcomings. In contrast, water-based peeling coatings are free of volatile solvents, which has great advantages in health and environmental protection requirements, and its research and development and application heat are increasingly prominent. 1.The function and mechanism ofwater-based peelable coating For strippable coatings, strippability and cohesiveness are two important indicators. The adhesion of the peel coating film should be moderate, too high adhesion will affect the peel of the film, too low adhesion will affect the corrosion resistance of the film, can be used to measure the substrate adhesion of the peel coating by 180° peel strength test to verify its strippability. At the same time, the coating film should have strong cohesion, the coating film will be stretched away from the substrate when it is stripped, and the film layer should remain continuous without fracture; If the strength of the film is not enough, the film layer may fracture or break into small pieces during peeling, which can not achieve the purpose of peeling. Tensile strength and elongation at break are usually used as indicators to measure the cohesion of the film. The main function of water-based peeling coatings is protection and decontamination. The use of water-based peeling paint as a protective film on the surface of furniture, mechanical parts, etc., can avoid direct contact between the medium such as microorganisms in the air and the surface of the protected object, slow down the corrosion failure rate of the surface, and thus play a protective role; At the same time, this protective film has a certain elasticity, and can play a buffering and protective role in the impact and grinding of the outside world. In addition, during the film forming process, the water-based strippable coating transfers the pollutants on the surface of the object to the film through adsorption; Or through the viscosity of the film-forming substance itself, the residue or pollutant on the surface of the protected object is adhered to; Both of these methods can transfer residues or pollutants to the film, and finally tear off the protective film on the surface of the object, thereby removing residues or pollutants. 2.Classification of water-based peelable coating According to the different film forming substances, water-based peeling coatings can usually be divided into vinyl, acrylic resin, polyurethane and other different types. Vinyl water-based strippable coatings...