Choosing an Outdoor-Stable Waterborne Aliphatic Polyurethane Dispersion

Assessing HPU-7660 for Exterior Coatings

When selecting a waterborne aliphatic polyurethane dispersion for outdoor applications, first check whether its UV and weathering performance has been measured under conditions similar to the intended exposure. The available product information for HPU-7660 does not report these results or make a confirmed long-term outdoor durability claim. Its stated water and chemical resistance may be useful, but should not be taken as proof of weather stability.

HPU-7660 is a water-based hydroxyl polyurethane dispersion intended for two-component waterborne polyurethane coatings used with a water-reducible polyisocyanate hardener. The product information lists high reactivity, rapid hardness development, high final hardness, high gloss, good water and chemical resistance, and low odor.

Formulation Guidance and Reported Benefits

The supplier recommends blending HPU-7660 with a water-based hydroxy acrylic resin at 10–50% of the total resin amount. According to the product description, this combination can support faster drying, greater final hardness and gloss, and improved resistance to after-tack. Test the complete formulation and application process before moving to production.

Outdoor Selection Checklist

Applications and Supplier Background

Rail transit, engineering machinery, steel structures, and outdoor wooden furniture are listed as application scenarios in the knowledge base. These examples do not establish that HPU-7660 has been tested or approved for each use. The available case descriptions mention two paint-industry clients in China but provide no formulation specifics or outdoor exposure results.

Guangzhou Guanzhi New Material Technology Co., Ltd. develops and manufactures water-based resins, crosslinkers, additives, and bio-based specialty polyols. Its research and application centers are located in Guangzhou and Shanghai, and the company reports more than 50 invention patents. It also holds a Quality Management System Certificate covering research and production of environmentally friendly multipurpose water-based polyurethane coating materials and high-performance water-based coating additives.

Frequently Asked Questions

Does the available data establish long-term outdoor suitability?

No. Good water and chemical resistance are reported, but UV testing, weathering results, and an outdoor service-life claim are not provided. Ask for data that matches the expected exposure.

How is HPU-7660 used in a coating?

It is intended for two-component waterborne polyurethane coatings with a water-reducible polyisocyanate hardener. The product description also recommends using HPU-7660 at 10–50% of total resin when blending with water-based hydroxy acrylic resin.

Which properties are stated by the supplier?

The listed properties include high reactivity, fast hardness development, high final hardness and gloss, good water and chemical resistance, and a solvent-free, low-odor profile.

Recommendation

HPU-7660 may be worth evaluating when its stated hardness, gloss, water resistance, and formulation role fit the coating specification. For exterior service, obtain UV and weathering evidence and test the finished coating under representative conditions before selection. The listed supply model includes research and development, manufacturing, direct sales, technical support, and formulation references. For technical assistance, contact Sophia Chao at sophia@guanzhihg.com.

About the Company

Guangzhou Guanzhi New Material Technology Co., Ltd. was established in 2014 and combines research and development, production, sales, and technical services for water-based materials. Its Guangzhou and Shanghai centers support development in water-based resins, crosslinkers, additives, and bio-based specialty polyols. The company holds a Quality Management System Certificate and an intellectual property management system certificate, and lists coating projects with two paint-industry clients in China.