Optimizing Wet-on-Wet Coating Process with 2K Epoxy Resin Systems: Techniques & Formulations

The "wet-on-wet" coating process involves applying a subsequent coat directly over the preceding layer before it has fully dried. This method is implemented to enhance production efficiency, reduce energy consumption, and strengthen inter-coat adhesion. Successful implementation requires coating compatibility, optimal application intervals, and controlled environmental conditions.

The two-component (2K) epoxy system combining WL-AD203 with curing agent WL-AC046 meets all wet-on-wet process requirements. This formulation exhibits:

lRapid drying characteristics

lSuperior application flowability

lExcellent thixotropic properties

lExtended effective open time

Notably, WL-AC046 curing agent features a comparatively low active hydrogen equivalent. This property significantly reduces the required curing agent dosage versus alternative systems, resulting in measurable cost savings while maintaining performance standards.

WL-AD203 waterborne 2K epoxy emulsion physical property

WL-AC046 Water based epoxy curing agent physical property

The active hydrogen equivalent of WL-AC046 is relatively low, and the overall cost of primer can be reduced by 20% compared with other similar products.

Surface drying can be achieved in 7-15 minutes above 5℃ and is suitable for "wet-on-wet" process

Salt spray resistance ≥ 500h

Pot-life at 35℃ > 5h

Comparison of anti-sagging performance with the same formula framework and viscosity

Xiamen WangQin Chemical Technology Co., Ltd. is a technology-based enterprise integrating research and development (R&D), production, and operations. Equipped with advanced modern production facilities and comprehensive testing equipment. Since its establishment,WangQin has built its brand and core competitiveness through "technological innovation". Specializing in the R&D, production, and applied research of polymer materials, the company has obtained numerous national invention patents and possesses continuous independent innovation and technological R&D capabilities.

Backed by a dedicated team of 50 professionals, WangQin operates state-of-the-art manufacturing infrastructure and comprehensive product testing systems to rigorously uphold ISO9001-certified Quality Management Systems. With an annual production capacity of 20,000 tons for both water-borne and oil-based resins, WangQin Provide multi-field industries application resin material products, from standard resin formulations to custom-tailored resin material solutions designed for diverse market needs.

Our Products‌:
Acrylic resins, alkyd resins, epoxy resins, polyester resins, amino resins, and other customizable products.

‌Service Fields‌:
Packaging printing, plastic products, metal products, glass products, construction machinery, construction, wood products, and new energy industries.

While pursuing technological innovation and business growth, WangQin also actively fulfills its corporate social responsibility (CSR). Specializing in the research and development (R&D), production, and applied research of polymer materials, WangQin drives green and sustainable development within the industry by providing high-quality, environmentally friendly polymer matrials products. WangQin strictly adheres to environmental management system certifications to minimize the environmental impact of the production processes. Additionally, WangQin proactively collaborates with industry peers to enhance its R&D capabilities and accelerate the translation and application of scientific achievements, contributing to societal progress. ‌Wangqin demonstrates its corporate social responsibility through tangible actions, exemplifying the accountability and leadership expected of an industry pioneer.

Guided by a philosophy of green and sustainable development, WangQin is dedicated to researching and developing eco-friendly, high-performance new material products. With a senior technical R&D team and deep expertise in polymer materials, coupled with extensive market experience, WangQin consistently introduces innovative products that meet both market demands and environmental standards. These products not only deliver exceptional performance but also significantly reduce environmental pollution, reflecting the company’s profound commitment to sustainability and its proactive implementation of sustainable practices.

WangQin leads the industry innovation, spearhead the digital transformation of production. By integrating intelligent sensing, big data analytics, and cloud computing technologies, we have achieved fully automated monitoring and management of production processes, significantly enhancing both efficiency and quality control precision. Within our digitalized workshops, every process is precisely controlled, ensuring that each step from raw materials to finished products—adheres to the highest standards. Empowered by digitalization, WangQin drives green intelligent manufacturing and sets a new benchmark for the industry.