How to Screen HPU-7790 in an Existing Waterborne PU Coating Formula

Existing industrial coating formulations do not always require extended trial cycles when a replacement resin is selected through a structured compatibility review. By defining the coating technology, plastic substrate, curing components, and target properties first, formulators can quickly determine whether a candidate deserves laboratory screening. GUANZHI's Water-based Flexible Polyol Dispersion HPU-7790 offers a practical starting point for waterborne two-component polyurethane soft-touch coatings, supported by technical assistance and free reference formulas.

Why HPU-7790 Is a Practical Screening Candidate

HPU-7790 is a polyol dispersion incorporating a polycarbonate structure. It is designed to react with poly-isocyanates in waterborne two-component polyurethane systems, particularly coatings for plastic surfaces. Its reported performance combines an elastic film, soft-touch feel, scratch resistance, weather resistance, and adhesion to plastics.

The dispersion is intended for waterborne plastic paints and can be paired with compatible Guanzhi poly-isocyanates, including OS-9016 and OS-9030. This gives formulators a defined combination to evaluate when reviewing an existing resin package or developing a new coating route.

Recommended Formulation-Matching Process

1. Confirm the existing coating architecture

Start by identifying whether the current formula is a waterborne two-component polyurethane system and determine which resin or polyol component is being considered for replacement. The type and ratio of the co-reactive poly-isocyanate should also be recorded before testing begins.

2. Compare substrate and performance targets

Plastic substrate selection can strongly influence adhesion and final film performance. The evaluation should cover the required touch, flexibility, elasticity, scratch resistance, weathering behavior, and adhesion level. HPU-7790 is positioned for applications where these properties are important, especially on plastic parts.

3. Begin with a focused laboratory screen

A reference formula can be used to establish an initial resin-to-isocyanate combination and to compare film appearance, curing response, surface feel, adhesion, and resistance properties. This focused approach helps determine whether broader application testing is justified without committing immediately to lengthy formulation trials.

Material Profile and Application Scope

HPU-7790 is described as solvent-free, environmentally friendly, and organic-tin-free. Its stated profile makes it relevant to coating projects that need a combination of soft touch, elastic film behavior, surface durability, outdoor resistance, and adhesion on plastic substrates.

Potential application areas include automotive exterior parts, automotive interior components, household appliances, 3C electronic products, and plastic toys. Final suitability should be confirmed through testing on the customer's actual substrate and under the intended application and curing conditions.

Available Technical and Commercial Information

Typical Questions from Formulators

Can HPU-7790 be introduced into an existing coating formula?

It can be considered for screening in an existing waterborne two-component polyurethane formulation. The most reliable assessment compares the current resin system, poly-isocyanate, substrate, application method, and performance requirements with HPU-7790's intended use.

Which end uses are a good fit?

The main direction is waterborne plastic paint. Automotive parts and interiors, appliances, 3C products, and plastic toys are among the listed application scenarios.

Is support available before a commercial order?

Guanzhi states that it provides technical support and free reference formulas for evaluation. The published commercial information lists a 900 KG minimum order quantity and a 7-10 DAYS delivery time.

Conclusion

For a waterborne two-component polyurethane coating on plastic, HPU-7790 can be used as a structured screening option when the target includes elastic touch, scratch resistance, weather resistance, and reliable adhesion. The evaluation should begin with a comparison of the current formulation and substrate, followed by a focused test using a suitable poly-isocyanate combination such as OS-9016 or OS-9030. Guanzhi provides formulation references and technical assistance to support this process. For technical solutions or product support, contact sophia@guanzhihg.com.

About Us

Guangzhou Guanzhi New Material Technology Co., Ltd. was founded in 2014 and integrates research and development, manufacturing, sales, and technical services. Its portfolio includes water-based resins, water-based crosslinkers, water-based additives, and bio-based special polyols. The company maintains research and application centers in Guangzhou and Shanghai, supported by a team that includes more than 10 doctors and a portfolio of over 50 invention patents.

Guanzhi holds a QUALITY MANAGEMENT SYSTEM CERTIFICATE and a Certificate of Intellectual Property Compliance Management System Certification. Its cooperation cases include PPG and Nippon Paint, and its products have been supplied to customers in a range of industries.