Water-based crosslinker, a water-soluble polymer compound, is a polymer synthesized by various methods using water as the dispersion medium and adding the right amount of emulsifier. Water-based crosslinkers are generally water-soluble and are used in coatings, inks, adhesives and other products. Due to the use of water-based crosslinkers and production processes are more complex, less water-based crosslinkers are used in coatings, inks and adhesives. Water-based crosslinkers have low viscosity, easy dispersion, no foaming, no free formaldehyde and other characteristics. It has been widely used in coatings, inks and adhesives.
Water-based cross-linking agents have the following characteristics:
- Good stability to water and most solvents
Water-based cross-linking agent with water as the dispersion medium, so the stability of water and most solvents are very good. The stability of cross-linking agent in aqueous medium depends on its molecular weight and structure. As the cross-linking agent is water-soluble, it can be completely dissolved in water, so it will not precipitate. Water-based cross-linking agent contains carboxyl group, its molecules contain carboxyl group, which makes the water-based cross-linking agent has good stability. In general, the covalent interaction between the carboxyl group and the hydrophilic group occurs mainly between two hydrophilic groups. For example, acrylic emulsions contain carboxyl groups and hydroxyl groups, and there is hydrogen bonding between them. This hydrogen bonding makes acrylic emulsions have good stability and are not easily affected by moisture, alkali, heat, light, oxygen and other factors. And it can remain stable under the influence of various factors, such as temperature, light, etc.
- Non-toxic and harmless, will not cause environmental pollution
The use of water-based crosslinker is to use water as a dispersion medium, add emulsifier and initiator, and react at a certain temperature to generate a polymer. This polymer is non-toxic and non-hazardous, and will not cause environmental pollution.
(1) It can be used in a variety of adhesive species, such as: water-based polyurethane, water-based acrylic, water-based polyurethane, water-based epoxy, etc;
(2) It can be used at room temperature and also at high temperature, which can meet the application requirements in various environments;
(3) Wide range of application, not only for substrates of various materials, but also for materials such as wood and paper;
(4) Convenient construction, can be applied by spraying, brushing or roller coating;
(5) Can be used with a variety of additives;
(6) High crosslink density and strength;
(7) Easy to use, can be adjusted according to the needs of users.
Water-based crosslinkers are widely used in coatings, inks, and adhesives are widely used. As a modifier, water-based crosslinker can be used to improve the film-forming properties of water-based coatings, can be used to improve the fluidity of water-based inks, can also be used to improve the water resistance of water-based adhesives.
Water-based crosslinkers are generally produced with water as the dispersion medium, and the right amount of dispersant can be added at the time of use. There is no need to use organic solvents for dissolution, which has little impact on the production environment and is easy to use. Water-based crosslinker in the application of coatings: Water-based crosslinker is mainly used in coatings, can make the coating curing speed faster and lower curing temperature. At the same time, because water-based crosslinkers mainly use water as the dispersion medium, there is no need to add organic solvents during production, which greatly reduces the production cost and lowers the cost of the product. In addition, it can also reduce the emission of harmful substances such as VOC.
Water-based crosslinker can use water as solvent without any organic solvent, which reduces the pollution of the environment by organic solvent in the production process. Low viscosity is easy to disperse, and can obtain higher cross-linking efficiency with very low dosing concentration and little dosing rate. Can be prepared at lower temperature. Free of free formaldehyde, avoiding the problem of formaldehyde pollution.
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