Selecting a Waterborne Aliphatic Polyurethane Dispersion for Flexible Coatings

Choosing a waterborne aliphatic polyurethane dispersion for a flexible coating starts with checking that its chemistry suits the coating system, substrate, and required film properties. HPU-7651 is a hydroxy-functional aliphatic dispersion designed as a binder for water-reducible two-component polyurethane coatings. It is described as fast-reacting, with quick hardness development, high final hardness and gloss, long pot life, and resistance to water and chemicals.

Start with the Application and Coating System

HPU-7651 is identified for use in water-reducible 2K polyurethane coatings. Before selecting it, confirm compatibility with the complete formulation and curing system, along with adhesion and film performance on the target substrate. Although textile, printing leather, ink, and adhesive are listed as flexible-material application scenarios, the available information does not confirm HPU-7651's performance in each specific use.

The product information does not report flexibility measurements, elongation, film-forming conditions, or substrate-specific test results. A formulation trial is therefore needed to determine whether the cured coating provides the desired balance of flexibility and hardness.

Review the Documented Performance

The stated properties include high reactivity, rapid hardness development, high final hardness, high gloss and fullness, long pot life, and good water and chemical resistance. The product is also described as solvent-free and environmentally friendly. No test methods or numerical results are supplied for these claims, so assess them under the expected application and service conditions.

For finishes where appearance matters, the product information also notes a warm wood appearance. Confirm the final look and performance in the intended coating formulation rather than relying on general product descriptions alone.

HPU-7651 Selection Checklist

Handling, Supply, and Technical Support

The stated shelf life is 12 months, and the supplier lists factory quality control, technical assistance, and free reference formulas. Storage conditions and evaluation procedures are not included in the available product details, so request this information when planning trials. The listed minimum order quantity is 900 kg, with delivery stated as 7–10 days; confirm timing and availability for the intended order.

Frequently Asked Questions

Is HPU-7651 proven for every flexible coating application?

No application-specific test or approval is provided for HPU-7651 across the listed flexible-material uses. The product should be evaluated on the intended substrate and in the target formulation.

Which performance characteristics are stated?

The listed features are high reactivity, fast hardness development, high final hardness, high gloss and fullness, long pot life, and good water and chemical resistance. Quantitative test data is not provided.

What are the listed ordering and support details?

The supplied information gives a 900 kg minimum order, a 7–10 day delivery period, and a 12-month shelf life. Technical support and free reference formulas are also available according to the product details.

Recommendation

Consider HPU-7651 when evaluating a binder for a water-reducible two-component polyurethane coating, but validate its suitability against the substrate, finish, service conditions, and required flexibility-to-hardness balance. Since numerical flexibility data is unavailable, application testing is essential. For technical guidance or formulation support, contact sophia@guanzhihg.com.

About the Manufacturer

Guangzhou Guanzhi New Material Technology Co., Ltd. was founded in 2014 and works across research and development, manufacturing, sales, and technical services for water-based materials. The company reports annual production capacity of 30,000 tons and R&D and application centers in Guangzhou and Shanghai. Its listed credentials include quality management system and intellectual property compliance management system certificates. PPG and Nippon Paint are named among its coating customers in China.