(1)KH-550 silane coupling agent ①Alias: 3 triethoxysilylpropylamine; AMEO CAS : 919-30-2 Colorless or very pale yellow transparent liquid. It is soluble in organic solvents, but acetone and carbon tetrachloride are not suitable as diluents. It is soluble in water and hydrolyzes in water. The amino functional silane is basic, has high reactivity, and is highly versatile. The silicon portion of the molecule can provide a strong bond to the substrate. The main amine functional group can react with a variety of thermosetting resins, thermoplastic plastics, and synthetic rubber materials. ②Chemical formula or molecular formula and structural formula: C9H23NO3Si; NH2CH2CH2CH2Si (OC2H5) 3. Structural formula: ③Physical and chemical properties and quality indicators  Melting point: -70℃ Boiling point: 217℃ Flash point: 104℃ Density: 0.946g/cm3 Refractive index: 1.4205 Content: ≥97% Main application It is mainly used in the following aspects. a.Glass fiber reinforcement  can greatly improve the flexural strength, tensile strength and interlaminar shear strength under wet and dry conditions, and significantly improve the wet electrical performance. When this silane coupling agent is used in both dry and wet conditions, the flexural and tensile strength of glass fiber reinforced thermoplastics, polyamides, polyesters and polycarbonates increases before and after immersion in water. b.Adhesives and sealants It is an excellent adhesion accelerator, which can improve the dispersion of pigments and increase the adhesion to glass, aluminum and steel. c.Fiberglass and mineral insulation materials Adding phenolic resin adhesive can improve moisture resistance and resilience after compression d.Mineral fillers and resin systems It can greatly improve the physical, mechanical and electrical properties of thermoplastic and thermosetting resins such as phenolic resin, polyester resin, epoxy, polyurethane and polycarbonate filled with inorganic fillers, and improve the wettability and dispersion of fillers in polymers. e.Casting applications It can improve the adhesion of phenolic adhesive and casting sand. It is helpful to improve the adhesion and water resistance of wear-resistant self-hardening sand and phenolic adhesive. f.Metal surface treatment After pretreatment of aluminum surface with 5% KH-550 ethanol solution, the tensile shear strength of aluminum-aluminum bonding with epoxy adhesive can be increased by 19.5%. KH-550 solution is chemically bonded to aluminum substrate after coating, rather than simply physical adsorption. It can obviously improve the bonding strength of aluminum and adhesive bonding interface. g.Grafted neoprene adhesive A silane coupling agent γ-aminopropyl triethoxysilane (KH-550) was used to improve the properties of grafted neoprene adhesive. As the ratio of KH-550 to grafted neoprene increased, the solid content increased. Among them, when the concentration is 2% to 5%, the adhesion is better. In addition, the homemade hexame...

The method of using silane coupling agent mainly includes pretreatment method and integral blending method. When using silane coupling agent, it is necessary to choose the appropriate method and conditions according to the specific situation. At the same time, it is also necessary to pay attention to the amount and time of use of silane coupling agent to ensure that it can play the best effect. ①Pretreatment method The pretreatment approach entails initially conducting surface treatment of the inorganic fillers using a silane coupling agent and subsequently incorporating them into the polymer. Based on the distinct treatment modalities, it can be classified into dry processing and wet processing. In the dry treatment, the inorganic fillers are initially introduced into a high-speed mixer. Simultaneously during the stirring process, the pre-prepared solution of the silane coupling agent is gradually added and uniformly dispersed on the filler surface for processing. In the wet treatment, during the production of the fillers, either impregnation with the silane coupling agent treatment solution or addition of the silane coupling agent to the filler slurry is carried out, followed by drying. Regardless of whether it is dry or wet treatment, in order to ensure the uniform coating of the silane coupling agent on the surface of the inorganic fillers, great attention must be paid to the treatment procedures, with particular emphasis on the stirring and drying conditions. ②Integral blending method In the case that pretreatment cannot be used, or the pretreatment method alone is not sufficient, the integral blending method can be used, that is, the silane coupling agent is mixed into the inorganic filler and the polymer. The advantage of this method is that the amount of coupling agent can be adjusted at will, and a step to complete the ingredients, so it is often used in industry. However, compared with the pretreatment method, in order to obtain the same modification effect, the integral blending method must use more silane coupling agent. The amount of coupling agent It is unnecessary to add silane coupling agent too much because the single molecular layer formed by very few coupling agents really plays the role of coupling in practice. The amount of silane coupling agent used depends on the type and surface area of the raw material. When the filler area is uncertain, the amount of silane coupling agent can be determined as 1.0% of the filler amount. In addition, when the integral blending method is used, the dosage can also be selected as 1.0% of the polymer mass, and the appropriate amount can be increased or decreased to obtain the best dosage.

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.