How to improve the water resistance and chemical resistance of water-based coatings? Here's the answer!

Water resistance solutions
1. Chemical cross-linking modified technology: (modified resin functional modified monosome modified curing agent water-based silane coupled agent plasticizer), such as improving cross-link density, cross-link strength modified method, cross-linking water-based system coating can show good water resistance, alcohol, chemical resistance, solvent resistance.
2. Physical cross-linking modified technology: the use of inter-molecular forces and hydrogen bonds, hydrogen bonds are special inter-molecular forces, through chemical reactions in the polymer main chain or side chain to introduce certain functional groups, improve the coating water resistance, alcohol resistance, chemical resistance and other properties
Considering the relationship between hydrogen bonds, crystallization and performance of polyurethane acrylic cyclooxide groups, hydrogen bonds are a physical attraction compared with the bonding forces of chemical bonds in molecules, which is much smaller than the bond forces between atoms, but the presence of a large number of hydrogen bonds is one of the important factors affecting performance in polar polymers. The more hydrogen bonds there are, the stronger the inter-molecular forces, the higher the strength of the material

.
3. Polymer blending modified: two or more polymers in an appropriate proportion, by mixing, to obtain a single polymer can not achieve the performance of the material. Improve coating water resistance, alcohol, chemical resistance, and performance by introducing certain functional groups.
4. Copolytic modified technology such as: epoxy resin compound modified copolymer emulsion in the membrane process opened into a three-dimensional cross-linking structure, resulting in irreversible co-price crosslinking, significantly improve the tensile strength of the coating and water resistance, alcohol, chemical resistance and other properties.
5. Organic fluorine functional monosome modified technology: by adding fluorine-containing functional monosome for change, modified thick resin or coating water contact angle, adhesion and hardness gradually increased, water absorption rate gradually decreased, stretch strength, fracture elongation rate increased and then decreased. The surface of the resin or coating can be significantly reduced, with good stretch strength and water resistance, due to the introduction of fluorine, to solve the traditional water-based polyurethane water resistance, poor oil resistance, alcohol resistance, chemical resistance and other performance shortcomings.
6. Multi-modified technologies: e.g. poor performance of a single polyurethane, the compounding of epoxy resins increases the chemical resistance of polyurethane film, toughness, water resistance, alcohol resistance, chemical resistance and so on.
7. Hydrophobic compounds modified technology: the addition of hydrophobic compounds to the formulation can improve the hydrophobicity of the paint film, reduce or reduce the immersion of the paint film. Wax lotion and wax powder are commonly used to improve water repugnant, alcohol-resistant wipe chemical resistance additives, which with PE wax emulsion effect is good.
8. The addition of diplomatic association (post-crosslinker) modified technology can reduce the particle size of water-dependent system emulsions, while improving the water resistance and hydrophobicity of the coating surface and significantly improving adhesion and cross-linking density. Poor oil resistance, alcohol resistance, chemical resistance and other performance significantly improved.
9. Hydrophobic nano-correction technology: the introduction of hydrophobic nano-filler function monomer, enhance water resistance, such as: inormeric nanomaterial silicon sol composite co-mixing and correction method, can make poor oil resistance, alcohol resistance, chemical resistance and other performance significantly improved.
。