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Water-based and aqueous phase are two distinct concepts.
Release Date:
2025-09-29
Water-based and aqueous phases have different meanings in the environment: ① For resin products, only the term “water-based” applies—meaning the resin is soluble in water, thus qualifying as a water-based resin. As for coating systems prepared using resins, both “water-based” and “aqueous phase” can be used to describe them; however, in either case, the primary solvent component of the coating system is water.
The terms "water-based" and "aqueous phase" have different meanings in environmental contexts: ① For resin products, only the term "water-based" is used—meaning the resin can dissolve in water, thus qualifying as a water-based resin. As for coating systems prepared from resins, either "water-based" or "aqueous phase" can be used to describe them; however, both terms refer to coating systems whose primary solvent component is water. ② In the context of resin production processes, there is no such thing as "water-based"—only the term "aqueous phase" is used. This refers to a production process in which water serves as the main process medium in a critical step. Resins produced via the aqueous-phase method are not water-free resins—for example, chlorinated rubber and polyvinyl chloride produced via the aqueous-phase method must be used in solvent-based systems for applications in coatings, adhesives, and inks. Thus, "water-based" and "aqueous phase" are two distinct concepts that are neither comparable nor interchangeable. ③ The aqueous-phase process is a traditional manufacturing technique: a) In the inorganic salts industry, most products—including their production processes—are based on water as a solvent. This includes a type of aqueous-phase suspension process used for solid materials, a technique with a history spanning hundreds of years. b) In organic synthesis, processes using water as a solvent—such as the suspension polymerization and emulsion polymerization methods employed in resin synthesis—have been maturely applied for over half a century. c) In the chlorinated polymer industry, the production of material-grade CPVC and CPE has also relied on the aqueous-phase suspension process for nearly 50 years.
Therefore, resins produced via the aqueous-phase process are non-aqueous resins—for example, aqueous-phase chlorinated rubber and aqueous-phase chlorinated polyvinyl chloride—which can only be dissolved in oil-based solvent systems. Hence, “water-based resin” does not necessarily refer to resins produced via the aqueous-phase process. Today, some companies employing aqueous-phase production processes take advantage of the vagueness in public understanding, using “water” as a gimmick to attract attention and gain popularity. They heavily emphasize the word “water,” thereby blurring the distinction between “water-based” and “aqueous-phase”—two fundamentally different concepts. This is a form of pseudoscience that deliberately confuses black with white.
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