With the rapid development of the environmentally friendly chemical industry, the classification and application of resins as key raw materials have attracted much attention. Among them, the confusion between water-soluble resins and water-based resins has plagued many practitioners. Although both belong to the environmentally friendly resin system, they are essentially different in dissolution principle, product form and application scenarios. Clarifying their differences is of great significance to the development of the industry. The core characteristic of water-soluble resins is that their molecules can be directly dissolved in water without the aid of emulsifiers and other auxiliary components. The hydrophilic groups such as carboxyl and hydroxyl groups contained in their molecular structure can form stable hydrogen bonds with water molecules, ultimately forming a homogeneous and transparent aqueous solution. This feature endows them with advantages such as convenient construction and uniform film formation when applied in fields such as coatings and adhesives. Moreover, they have outstanding environmental protection properties without the release of volatile harmful substances, which is in line with the current green production concept.
     Water-based resins are a broader category, and water-soluble resins are only an important sub-category. In addition to water-soluble resins, water-based resins also include water-dispersible resins, such as acrylic emulsions and polyurethane dispersions. Such resins exist in water as tiny particles, and the system is mostly milky white or translucent. Emulsifiers are usually required to maintain the stability of the dispersion state. Thanks to the diversified product forms, water-based resins have a wider range of application scenarios, from architectural decoration to industrial coating, from daily necessities processing to high-end manufacturing.
     With the continuous tightening of environmental policies and the increasing market demand for green products, the water-based resin industry has ushered in a golden period of development. As a technically mature and environmentally friendly category, water-soluble resins have gradually increased their market share; while water-dispersible resins continue to expand new application fields with their application flexibility. Complementing each other, the two jointly promote the high-quality and sustainable development of the environmentally friendly chemical raw material industry.

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