How to Specify the Hydroxyl Level in Hydroxy Functional Acrylic Resin

Why the Hydroxyl Level Cannot Be Confirmed from the Supplied Data

The available product information does not state a hydroxyl value or hydroxyl content for a hydroxy functional acrylic resin. Instead, it identifies RU-13000 as a waterborne aliphatic polycarbonate self-matting polyurethane dispersion. Therefore, its published performance data cannot be used to establish the hydroxyl level required for an acrylic resin.

To set an appropriate specification, obtain the technical data sheet for the actual hydroxy functional acrylic resin and compare its properties with the formulation, curing system, and final coating performance requirements.

Key Points for Resin Specification

• No hydroxyl number or hydroxyl content is provided in the supplied record.
• RU-13000 is a polyurethane dispersion, not a product identified as a hydroxy functional acrylic resin.
• Gloss, adhesion, scratch resistance, and water resistance data describe RU-13000’s application performance rather than an acrylic resin hydroxyl specification.
• The required hydroxyl level must be selected from the target resin’s technical documentation and the requirements of the intended coating system.

What the RU-13000 Information Actually Describes

The product record refers to Water Based Self-matting Polyurethane Resin RU-13000. It reports properties such as air drying, adhesion to solvent-based polyurethane, scratch resistance, recoatability, cold and hot water resistance, and permeability. These characteristics may help evaluate the polyurethane dispersion for certain applications, but they do not indicate its hydroxyl level or define the hydroxyl requirement of an acrylic resin.

According to the available information, RU-13000 may be combined with a water-based isocyanate hardener to produce a soft-touch, transparent finish with gloss below 5 degrees. This recommendation applies specifically to the stated polyurethane dispersion and should not be transferred to a different acrylic resin without supporting technical data.

Application Context and Data Limitations

RU-13000 is listed for wood coatings, plastic coatings, and baking coatings. The product information also recommends limiting pigment content in colored paint to no more than 15% of the formulation. These details provide useful formulation context, but they still do not establish a hydroxyl value for a hydroxy functional acrylic resin.

Guangzhou Guanzhi New Material Technology Co., Ltd. describes research and application centers in Guangzhou and Shanghai, more than 50 invention patents, and a technical team that includes over 10 doctors. Its quality management certification covers the research and production of environmentally friendly multipurpose water-based polyurethane coating materials and high-performance water-based coating additives. None of these company-level details replaces the missing acrylic resin specification.

Information Comparison

Recommended Technical Review

Before specifying the resin, request the target acrylic product’s technical data sheet. Confirm the reported hydroxyl value or hydroxyl content, resin solids, viscosity, molecular characteristics, recommended crosslinker, and intended application. The selected value should then be evaluated through the complete coating formulation and performance targets rather than inferred from the properties of an unrelated polyurethane dispersion.

Frequently Asked Questions

What hydroxyl level should be specified for a hydroxy functional acrylic resin?

The supplied information does not support a numerical value. Request the hydroxyl specification for the particular acrylic resin and match it to the coating’s curing, hardness, flexibility, adhesion, and durability requirements.

Can RU-13000 be used to determine the acrylic resin hydroxyl level?

No. RU-13000 is described as a waterborne aliphatic polycarbonate self-matting polyurethane dispersion, and its product record does not provide a hydroxyl level.

What performance information is available for RU-13000?

The available data mentions air drying, adhesion on solvent-based polyurethane, scratch resistance, recoatability, cold and hot water resistance, permeability, and use in wood, plastic, and baking coatings.

Conclusion

Do not assign a numerical hydroxyl level based on the supplied product record alone. The record concerns polyurethane dispersion RU-13000 and contains no hydroxyl value for a hydroxy functional acrylic resin. Obtain the correct acrylic resin technical specification, then select and validate the requirement against the complete coating formulation and intended end use.

Guangzhou Guanzhi New Material Technology Co., Ltd. reports expertise in water-based materials, formulation support, and technical services. For detailed assistance, contact sophia@guanzhihg.com.

About Us

Guangzhou Guanzhi New Material Technology Co., Ltd. was established in 2014 and integrates research and development, production, sales, and technical services. Its product portfolio includes water-based resins, water-based crosslinkers, water-based additives, and bio-based special polyols. The company reports annual production capacity of 30,000 tons, holds a quality management system certificate covering specified water-based polyurethane coating materials and coating additives, and has cooperation cases with coating customers in China.