In the chemical resin industry, the dispersion and wetting properties of pigments are the core factors that determine the quality of products such as coatings and inks. Excellent pigment wettability can not only improve color uniformity, but also enhance the adhesion, durability and environmental friendliness of the coating. This article will deeply explore the key technologies of pigment wettability, and combine the cutting-edge cases in the industry to analyze how to achieve this performance breakthrough through innovative resin formulations.
1. Importance of Pigment Wettability and Technical Challenges
Material wettability refers to the affinity between the resin and the surface of the pigment particles, which directly affects the dispersion stability of the pigment and the final performance of the coating. If the wettability is insufficient, it will cause problems such as pigment agglomeration, floating color, and blooming, and even affect the weather resistance and glossiness of the coating.
Traditional resins often rely on additional wetting agents or dispersants to make up for this defect, but this may introduce problems such as high cost and poor environmental protection. For example, although water-based alkyd paint has a certain degree of wettability, it still needs to add additives to improve efficiency. Modern resin technology achieves the "self-wetting" function through molecular structure optimization, reduces dependence on additives, and meets environmental regulations.
2. How to improve pigment wettability with innovative resin technology
Epoxy-modified polyester resin: structural optimization enhances interfacial affinity
Carpoly's recently launched epoxy-modified polyester odorless color paste resin significantly improves the wettability and dispersibility of the resin on pigment powder by introducing epoxy structure. The environmentally friendly solvent system in its formula not only removes irritating residues, but also strengthens the binding force between the resin and the pigment through chemical bonding, making it suitable for high-solid and low-viscosity coating systems.
Water-based acrylic resin: molecular design achieves high compatibility
Tianlong ink's water-based acrylic resin uses a special process to control the molecular weight distribution, giving the resin excellent pigment wettability and dispersion stability. Its solid form can be directly dissolved in alkaline aqueous solution, compatible with various emulsions, suitable for water-based ink color paste and environmentally friendly coatings, and can achieve low foam and high gloss effects without additional additives.
UV prepolymer resin: functionalized functional groups improve performance
UV offset ink resin UVP305 exhibits excellent viscoelasticity and pigment wettability in UV monomer diluents by modifying the prepolymer structure. Its special functional groups not only optimize the ink transfer performance, but also ensure adhesion and grinding efficiency on a variety of substrates. It is widely used in the packaging printing field.
3. Industry Application Cases
Coatings: Epoxy-modified polyester resins are used in odorless color pastes to reduce VOCs emissions while improving coating efficiency. They are suitable for high-end markets such as furniture and automobiles.
Ink printing: Water-based acrylic resin and UV prepolymer resin, with their high wettability, help inks achieve fast drying and high color saturation, meeting environmental protection requirements such as food packaging.
Industrial anti-corrosion: Self-flame retardant modified resins have outstanding performance in steel structure anti-corrosion. Their high cross-linking density and permeability extend the coating life and reduce maintenance costs.
In the field of chemical resins, pigment wettability is not only the focus of technological competition, but also the core of product differentiation. Through molecular structure innovation and functional design, resin companies can provide customers with more efficient and environmentally friendly solutions. If you need to know more about the technical parameters of related resin products or customized services, please contact our technical team for professional support and sample testing.