How to Select a Flexible, Durable Water-Based PU Grade

Choosing a water-based polyurethane grade starts with the coating’s intended substrate and the film properties the finished application requires. For plastic coatings that need flexibility, a pleasant feel, and resistance to weathering and scratches, Water-based Flexible Polyol Dispersion HPU-7790 is a grade to consider. It is designed for waterborne two-component polyurethane systems used with polyisocyanates.

Start with the Substrate and Performance Needs

Define the required film behavior before selecting a resin. HPU-7790 is described as forming a highly elastic film with good touch, weather resistance, and scratch resistance. Its stated adhesion benefit is on plastics, and the product is especially suited to water-based plastic paints.

The product is a polyol dispersion with a polycarbonate structure. In a coating formulation, it is used with a polyisocyanate to create a waterborne two-component polyurethane system. Guanzhi OS-9016 and OS-9030 are listed as compatible crosslinker examples. Mixing ratios and curing conditions are not specified in the available product information, so confirm the appropriate formulation with the supplier.

HPU-7790 at a Glance

Formulation and Quality Considerations

HPU-7790 is described as solvent-free, organic tin free, and environmentally friendly. The product information lists factory quality control. Separately, the company describes inspection practices that include solid content, pH, viscosity, and particle size distribution; these are company-level checks, not published numerical specifications for HPU-7790.

When evaluating the grade, test it in the intended coating system and on the actual substrate. This helps establish whether the film properties, adhesion, and crosslinker compatibility suit the application. The company identifies 3C digital products, automotive interiors, household appliances, and plastic toys among its application areas.

Frequently Asked Questions

Can HPU-7790 be used in water-based plastic paints?

Yes. Water-based plastic paints are identified as a particularly suitable application, and the product information states that it has good adhesion on plastics.

Which properties support its flexible and durable positioning?

The stated features are a highly elastic film, good touch, scratch resistance, and weather resistance. Quantified test results are not provided in the available information.

What crosslinkers are listed for this dispersion?

HPU-7790 is intended for use with polyisocyanates. Guanzhi OS-9016 and OS-9030 are listed examples. Ask technical support to confirm the crosslinker and conditions for your formulation.

Supplier Background and Next Steps

Guangzhou Guanzhi New Material Technology Co., Ltd. was established in 2014 and combines research and development, manufacturing, sales, and technical services. Its product divisions cover water-based resins, crosslinkers, additives, and bio-based special polyols, with R&D and application centers in Guangzhou and Shanghai. The company reports more than 50 invention patents and annual production capacity of 30,000 tons. It also holds a Quality Management System Certificate covering research and production of environmentally friendly multi-purpose water-based polyurethane coating materials and high-performance water-based coating additives, as well as an Intellectual Property Compliance Management System Certification. Its listed cooperation cases involve coating applications, including work with two leading Chinese paint and coatings providers.

For plastic coatings requiring elasticity, weather resistance, scratch resistance, and adhesion, HPU-7790 is a grade to evaluate in a waterborne two-component polyurethane system. Confirm substrate performance, formulation conditions, and supply details directly with the supplier. Technical support and reference formulas are available at sophia@guanzhihg.com.

About Guanzhi

Guangzhou Guanzhi New Material Technology Co., Ltd. develops and supplies water-based coating materials and related products.