What is the difference in the application range of acrylic resins with different structures?

Acrylic resin has excellent light resistance, weather resistance, non-yellowing, long-term high gloss performance, and has grafting, copolymerization and blending modification with other monomers and polymers to obtain excellent water resistance and chemical resistance. Antifouling and corrosion resistance, etc., are widely used in many fields such as coatings, adhesives, inks, textiles and leather auxiliaries. But what is the difference in the application range of acrylic resins with different structures?






At present, some vague concepts have appeared in the society, and water-based resins are generally referred to as water-soluble resins. In fact, water-based resins are classified according to their appearance, which can be divided into water-emulsion type, water-dispersible type and water-soluble type. Water-emulsion resin is prepared by adding emulsifier. Water-soluble resin is realized by the self-emulsification produced by the hydrophilic group on the polymer chain. Water-dispersible resin is somewhere in between the two. The amount of emulsifier added is small and the hydrophilic group is insufficient. It depends on external forced power, such as high-speed stirring and dispersion, or ultrasonic waves to achieve water dispersibility. Therefore, its particle size and transparency are also between the former two. Water-emulsion type is heavy and oily, generally milky white. The water-soluble resin is transparent, a true solution of molecular-level dispersion, and is in a nano-dispersed state.

Water-emulsion acrylic resins and water-soluble (including water-dispersible) acrylic resins have different structures and different properties, so naturally they have different uses. Water-emulsion resins are oily, and they must be wrapped by surfactants, that is, emulsifiers, before they can be dispersed in water. Therefore, when they are used in combination with other resins and additives, be careful not to demulsify and flocculate the outer coat by temperature, stirring power, or adsorption or reaction of additives. Water-soluble resin, because it contains many polar groups in the molecular chain, such as: hydroxyl, carboxyl, sulfonic acid, amino, amide, methylol, oxyethylene, etc. Therefore, water dispersions and water-soluble resins have certain polymer surface activity. According to the ratio and distribution of hydrophilic group and hydrophobic group, the surface activity is different, such as: wetting and dispersing, emulsifying and defoaming, osmotic adsorption, etc. are all different. According to the structural properties of these water-soluble resins to select additives and matching conditions, they can find ideal applications in coatings, adhesives, textile and leather additives. The water-emulsifiable resin has a narrow application range (5-40 degrees), and it may demulsify if it exceeds this range. The water-soluble resin has a wide use temperature, can withstand the test of freezing and thawing and heat resistance, and can obtain better performance and larger application fields than water emulsion.