Coupling agents have always been an amazing additive Coupling agents, also known as surface modifiers, are a special type of additive that Coupling agents, also referred to as surface modifiers, are a particular type of additive that is dedicated to optimizing the interfacial characteristics among the adhered substrate, fillers, and polymeric materials, significantly enhancing the binding force between inorganic substances and organic polymeric materials. In the application of adhesives, coupling agents exert a vital role, significantly improving the adhesion strength of the solid surface between the resin base of the adhesive, fillers, and the adhered substrate. Its core feature lies in the fact that its molecular structure contains two distinct functional groups: one tends to undergo chemical reactions with the surface of inorganic substances, while the other tends to undergo chemical reactions or form hydrogen bonds and be miscible with synthetic resins or other polymeric base materials. This unique molecular structure enables the coupling agent to act like a "molecular bridge", connecting the inorganic and organic worlds, improving the interfacial interaction between the two, enhancing the interfacial compatibility, and thereby significantly enhancing various properties of the bonding materials, such as physical and mechanical properties, electrical properties, thermal properties, optical properties, etc. Coupling agentsare also widely used in the rubber industry. It can not only improve the wear resistance and aging resistance of tires, rubber plates, rubber hoses, rubber shoes and other products, but also reduce the cost by reducing the amount of rubber. In the adhesive material, the role of the coupling agent is that it can form an interface layer between the reinforcement material and the resin base, the interface layer can not only transfer stress, enhance the bonding strength between the two, but also prevent other media from penetrating, further improve the interface state, which is conducive to the aging resistance, stress resistance and electrical insulation properties of the produc. Function overview of coupling agent The coupling agent can significantly improve the interface bonding force between the resin and the reinforcing material, whether it is at the interface between the resin matrix and the reinforcing material, or in a variety of other application scenarios, it can promote or establish a strong bond. Coupling agents can be applied in a variety of ways, can be applied to the reinforcement material, can be added to the resin, or a combination of both. In different fields, coupling agents play different roles: The coupling agent can significantly improve the interface bonding force between the resin and the reinforcing material, whether it is at the interface between the resin matrix and the reinforcing material, or in a variety of other application scenarios, it can promote or establish a strong bond. Coupling agents ca...

Polyurethane coating film bright and full, hard wear-resistant, oil, acid, chemical and industrial waste gas resistance, good electrical properties, and a variety of resin miscible, can be adjusted in a wide range of formulations to meet different needs. Widely used in wood, automobile, aircraft, machinery, electrical appliances, instruments, plastics, leather, paper, fabric, petrochemical and other aspects. First, the characteristics and applications of polyurethane coatings  Polyurethane coatings have high mechanical wear resistance and toughness. At the same time, polyurethane coatings are both protective and decorative, and can be used for high-end wood, piano, large passenger aircraft and other coating. Polyurethane, like epoxy, can be configured as an excellent adhesive. Therefore, the film has excellent adhesion to a variety of surfaces (metal, wood, rubber, concrete, some plastics, etc.). Second, polyurethane coating is non-toxic and environmentally friendly Polyurethane waterproof coating, a new polymer multifunctional material. The waterproof coating has good water resistance, impermeability, heat insulation, corrosion resistance, extensibility, bonding strength, black color, long service life, low price, cold construction, easy to use, small odor. Polyurethane waterproof coating is a new type of waterproof material which is non-toxic, odorless and has good decorative effect. Now the polyurethane waterproof coatings are upgraded, all environmentally friendly coatings. Polyurethane waterproof layer has good waterproof and impermeability, heat insulation and anti-corrosion effect, its high bonding strength, good extensibility, strong corrosion resistance, long service life, cold construction. The polyurethane coating has non-toxic and tasteless and good decorative effect, is a new generation of waterproof material varieties.

Fabric coating finishing is to evenly coat a layer of molecular film on the surface of the fabric to give the fabric with various functions and expand the use of the fabric. Compared with other coating materials, polyurethane coating has high tensile strength, large elongation, good elasticity, good wear resistance, heat resistance, low temperature resistance and aging resistance, and is a high-quality coating material. The main processing methods of polyurethane coated fabrics are dry and wet. Dry coating can be divided into direct coating and transfer coating, especially transfer coating. Direct coating is the coating agent directly coated on the surface of the fabric, mainly used to make thin waterproof clothing. Transfer coating is the preparation of the solution type polyurethane slurry on the release paper, after drying to form a film, and then the use of adhesive, extrusion, drying to make the base cloth and film closely together, and finally the release paper peel, can form a coated fabric with a pattern. There are three main wet coating methods: direct coating method, that is, the prepared polyurethane slurry is first coated on the substrate, and then wet solidified to form a porous cortical film; The second is the film method, that is, the polyurethane slurry is coated on the polyurethane film, the wet film is formed into a porous layer, and then it is fitted on the background cloth; The third is the impregnation method, that is, the base cloth is impregnated in the polyurethane slurry, and then the excess slurry is scraped away, and then the porous skin film is formed by wet solidification. Sinogracec Chemical is a service-oriented company with functional textile technical services as the core, which can provide customers with waterproof, antibacterial, flame retardant and other functional solutions such as clothing, leather, luggage, wall cloth wallpaper, yarn, ribbon, shoe materials.

Leather finishing is generally divided into three parts:Primer coat, middle coat, and topcoat.Primer requires strong adhesion, hiding power, good embossing formability and stereotyping, and the middle coating further covers and modifies the color, and finally achieves the visual and physical performance requirements through the topcoat.With a specific topcoat, 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,SinograceChemical 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. If you want to know more about Water-based polyurethane topcoat for leather information, or need samples, please contact us. Contact Us mailbox:sales@sinogracechem.com