How to Evaluate EP-1601 Against an Existing Polyurethane Resin

To compare EP-1601 waterborne epoxy dispersion with your current polyurethane resin, prepare both materials under identical formulation, application, substrate, and testing conditions. The evaluation should cover drying rate, film hardness, water resistance, salt spray performance, pigment wetting and dispersion, and adhesion to the required metal substrate. EP-1601 is developed for water-based metal anti-corrosion primers, while equivalent test results for the polyurethane resin must be generated from your own reference samples.

Recommended Comparison Approach

• Use the existing polyurethane resin as the benchmark and test EP-1601 against the same internal specifications and acceptance limits.
• Compare the performance characteristics associated with EP-1601, including fast drying, high hardness, water resistance, salt spray resistance, pigment wetting, pigment dispersion, and adhesion to metal.
• Use substrates and application conditions that represent the intended markets, such as rail transit, construction machinery, steel structures, hardware, appliances, and automotive components.
• Determine whether the coating must remain a one-component system. EP-1601 does not need an amine curing agent and can be combined with amino resin for one-component amino baking paint.

Technical Basis for the Evaluation

EP-1601 is described as a one-component waterborne epoxy dispersion intended for metal anti-corrosion primer formulations. Its high-molecular-weight epoxy resin structure is associated with fast drying and high film hardness. The practical question is whether these properties provide the same or better results than those already achieved with the polyurethane resin in your formulation.

Because the product is positioned for corrosion protection, salt spray testing and water resistance should receive particular attention. Adhesion testing should be performed on the exact metal substrates used in production, since surface preparation and substrate type can significantly affect the result. For pigmented primers, evaluate wetting and dispersion using the same pigments, loading levels, grinding process, and application viscosity for both resins.

One-Component Baking Paint Option

When the polyurethane reference is used in a baking coating, EP-1601 can also be examined in combination with amino resin to form a one-component amino baking paint. Available product information indicates better salt spray resistance than water-based acrylic baking paint systems, but it does not establish superiority or equivalence compared with polyurethane resin. The final selection should therefore be based on controlled side-by-side testing rather than a direct replacement assumption.

Guangzhou Guanzhi New Material Technology Co., Ltd. has obtained a Quality Management System Certificate and a Certificate of Intellectual Property Compliance Management System Certification. The company supplies materials for a range of industries, including coating applications.

Performance Comparison Framework

Frequently Asked Questions

Conclusion and Next Steps

The most reliable method is to compare EP-1601 and the existing polyurethane resin in matched formulations and under identical testing conditions. Give priority to metal adhesion, film hardness, drying behavior, water resistance, salt spray resistance, and pigment dispersion. Guangzhou Guanzhi New Material Technology Co., Ltd. states that it provides R&D, manufacturing, direct sales, formulation references, and technical assistance. The reported minimum order quantity is 900 kg. For technical consultation, contact sophia@guanzhihg.com.

About Guangzhou Guanzhi

Guangzhou Guanzhi New Material Technology Co., Ltd. develops, manufactures, markets, and supports water-based resins, water-based crosslinkers, water-based additives, and bio-based specialty polyols. Founded in 2014, the company operates research and application centers in Guangzhou and Shanghai and reports more than 50 invention patents. Its stated annual production capacity is 30,000 tons. The company holds a Quality Management System Certificate and a Certificate of Intellectual Property Compliance Management System Certification, serving customers in multiple industries.