I. The role of silane coupling agents in coatings and inks. The role of silane coupling agents in coatings and inks.


(1) Improve the adhesion of the coating.


(2) Improving the durability of the coating.


(3) Improve the weatherability of the coating.


(4) Improving the toughness of the coating.


(5) Decrease the dispersive viscosity of fillers and pigments and improve the dispersibility of pigments.


2. Application of silane coupling agent in primer. The covalent bond of silicon atom has unique ability to combine organic and inorganic substances. The inherent stable structure of silicon oxygen makes it an important part of high performance primer. The application of silane coupling agent in primer can improve its adhesion, keep its humidity, chemistry, anti-ultraviolet ray and reinforcement, and improve the dispersion of fillers.


Alkoxysilane coupling agents can be compatible with many organic resins. In fact, silane coupling agents are very strong polar solvents, and the polymerization of silane coupling agents affects the compatibility and final properties of polymers.


On the surfaces of organic polymers and inorganic substances (e.g., pigments, fillers and glass, metal surfaces), inorganic alkoxy functional groups couple a large number of organic groups in the form of covalent bonds.


The organic functional groups of silane coupling agents can produce excellent results as long as the organic polymers matching them are found.


III. Silane Coupling Agent as Adhesion Promoter


When the coating contains a small amount of silane coupling solvent, after coating, the silane coupling agent will migrate to the interface between the coating and the substrate, react with water on the inorganic surface, hydrolyze to form silanol group, and then form hydrogen bond or condensation with hydroxyl groups on the substrate surface - Si-M (M is inorganic surface), at the same time, the silane coupling agent will be separated. The silanol groups of the substrates condense and oligomerize with each other to form a reticulated membrane covering the surface of the substrates.


Even under water immersion conditions, silane coupling agent modified coatings adhere well to various inorganic substrates. In the boundary layer between the paint base and the substrate, silane coupling agent interacts with the paint base, forming a network structure of silane coupling agent and the paint base penetrating each other, enhancing its cohesion and stability against water erosion, and transferring stress from the modulus of the substrate to the low modulus of the paint base, thus significantly improving the adhesion to the substrate.


792 acrylic acid, alkyd resin, epoxy resin, polyester, polyurethane, ethylene base coatings: diluted with isopropanol to 10% solid; additives: 0.5-3.0% for various paint systems to enhance the adhesion of glass, aluminum and steel surface


570 acrylic acid, alkyd resin, epoxy resin, polyester, polyurethane, vinyl, unsaturated polyester resin primer: diluted to 0.1%-0.5% in acidic (PH-4.0) water; additive: 0.5-3.0% to enhance the adhesion of free radical crosslinked resin to inorganic substrates, such as polyester resin:


560 acrylic acid, alkyd resin, epoxy resin, nitrocellulose, phenolic aldehyde, polyester, polyurethane, ethylene base coatings: diluted to 10% solid with isopropanol; additives: 0.5-3.0% for various coating systems to enhance the adhesion of glass, aluminium and steel surface


171 151, 172 acrylic acid, alkyd resin, epoxy resin, polyester, polyurethane, vinyl used in acrylic coatings and other coatings, as well as the surface treatment of pigments


Conversion from Ipax Coupling Agent