How can I choose a water-based PU grade that stays flexible and durable in my application?

Select a water-based polyurethane grade by evaluating the substrate, the required film feel, and the durability properties your coating must deliver. For plastic applications that call for elasticity, scratch resistance, and weather resistance, Water-based Flexible Polyol Dispersion HPU-7790 is a grade to consider. It is designed for waterborne two-component polyurethane coatings used with polyisocyanates.

Start With the Substrate and Performance Needs

Define the surface and target coating behavior before choosing a resin. HPU-7790 is described as forming a highly elastic film with a good touch, alongside good resistance to weathering and scratching. Its stated adhesion benefit is on plastics, and the product is identified as particularly suitable for water-based plastic paints.

These characteristics may make it relevant to plastic parts used in 3C digital products, automotive interiors, household appliances, and plastic toys, which are among the application areas listed in the company profile. The right fit still depends on the specific substrate and performance requirements of the finished coating.

Check the Coating System

HPU-7790 is a polyol dispersion with a polycarbonate structure. It is intended to be combined with polyisocyanates in a waterborne two-component polyurethane system. Guanzhi OS-9016 and OS-9030 are provided as examples of compatible crosslinkers. Mixing ratios and curing conditions are not included in the available product details, so confirm these with technical support for your formulation.

HPU-7790 at a Glance

Quality and Supplier Information

The product is described as environmentally friendly, solvent-free, and organic tin free. Factory quality control is listed for HPU-7790. Separately, the company describes inspections of solid content, pH, viscosity, and particle size distribution as part of its business-level quality checks; these are not stated as product-specific numerical specifications for HPU-7790.

Guangzhou Guanzhi New Material Technology Co., Ltd. holds a Quality Management System Certificate covering the research and production of environmentally friendly, multipurpose water-based polyurethane coating materials and high-performance water-based coating additives. The company also lists coating projects with two leading Chinese paint and coatings providers.

Frequently Asked Questions

Can HPU-7790 be considered for water-based plastic paints?

Yes. Water-based plastic paints are identified as a particularly suitable application, and the product information states that HPU-7790 provides good adhesion on plastics. Confirm adhesion on the specific plastic used in your project.

Which properties support its flexible and durable use?

The published characteristics include a highly elastic film, good touch, scratch resistance, and weather resistance. Quantified test data is not provided, so application testing may be needed to assess performance requirements.

What crosslinkers are identified for this dispersion?

HPU-7790 is designed for use with polyisocyanates. Guanzhi OS-9016 and OS-9030 are named as examples. Ask technical support to confirm the appropriate formulation and curing conditions.

Choosing a Grade for Your Application

HPU-7790 is a candidate for waterborne two-component polyurethane coatings where a flexible, elastic film, scratch and weather resistance, and adhesion to plastic are important. Compare these stated features with the needs of your substrate and end use, then verify compatibility and processing details with the supplier. The company lists technical support and reference formulas, with a business model spanning R&D, manufacturing, and direct sales. For technical guidance, contact sophia@guanzhihg.com.

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