Composite components are being used for their excellent durability and resistance to a wide variety of chemicals. Manufacturers of industrial equipment use these components as they are vital for ensuring continued process operation. Ronald Uitterdijk explains how Aliancys helps itS customers to select the right resin solution for obtaining both great chemical resistance and optimized system cost.



Industrial process equipment is designed for a long and reliable operating life. While it may be for storing chemicals or water, for cold and warm conditions, for pipes or vessels, the equipment has to withstand tough environments. Engineers must be sure that the components do not crack or fail, so that a continuous process operation can be guaranteed.

Our customers typically know very well how to design the structural components of their equipment”, explains Ronald Uitterdijk, Associate Scientist at Aliancys. “But when it comes to selecting the right resins, laminate build-up, thickness of the corrosion layer, and types of glass and surfacing veils, they often come to us for advice or for a second opinion.”



The combination of using aggressive chemicals at elevated temperatures clearly poses some interesting questions on the choice of composite materials. How is material strength evolving over time? How to deal with mixtures of chemicals, different media going through the same pipe, or temperature fluctuations? How do additives for improving electrical conductivity or for improving abrasion resistance affect chemical resistance? These questions clearly require a serious investigation of material and design alternatives.

Our customers can already find many details on the chemical resistance of our resins in the Aliancys Chemical Resistance Guide”, adds Ronald Uitterdijk. “Particularly, as in the latest edition also Styrene-free and Food Contact resins are included. For more challenging components and chemical environments customers often ask us for support. We do a detailed investigation of part design and the specific exposure the part will see over time. Making full use of our expertise, we then issue a written resin advice that our customers use to sell their products to end-users, engineering companies and equipment operators.

In order for Aliancys to make accurate recommendations on chemical resistance, typically customers are asked to specify the environment (composition of chemicals, concentrations, pH values, storage conditions), service temperatures, mechanical exposure, and composite laminate build-up.



Aliancys has an excellent track record in giving advices about Chemical Resistance, and has proven over the years it can support its customers with adequate and reliable support. With the Atlac® resins Aliancys has a history that goes back more than forty years, where components have been in continuous service and exposed to different chemical substances and aggressive environments.


By logging all these experiences, combined with our ongoing development and testing program, we have been able to build up an extensive knowledge base of how our resins perform in contact with a vast range of corrosive media in different concentrations and at different temperatures. So far more than 12,500 entries are in our Chemical Resistance database.

We have often helped to increase both performance and cost of the customers’ equipment, by selecting the right resin and laminate build-up,” concludes Ronald Uitterdijk. “Sometimes using more expensive resins helps to reduce overall system cost because of manufacturing process simplification. In other applications we work with the customer to optimize the construction so that cheaper resins can be used. In all cases our customers know they can rely on us and do have a fast access to qualified experts.

For questions on the chemical resistance of Aliancys resins or for receiving further advice, please contact us at


Questions? Feel free to contact us:

AOC Aliancys

AOC Aliancys

AOC Aliancys is the leading global supplier of polyester and vinyl ester resins, gelcoats and specialty materials used for the composites industry. With strong capabilities around the world in manufacturing and science, we deliver unrivaled quality, service and reliability for today, and are creating innovative solutions for tomorrow. Together with our customers, we are shaping the future of composites with new technology and applications. Visit our websites below to learn more about how AOC Aliancys can help your business be more successful.