According to Messi Biology, when you walk into a furniture store, the smooth, wear-resistant surfaces of furniture, the glossy coatings on car bodies, and the waterproof finishes on building exteriors all owe their quality to polyurethane (PU) coatings. Known for their strong adhesion and excellent weather resistance, these coatings have become a “coating star” in industrial and civil applications. However, what is less known is that polyurethane coatings subtly release carbon dioxide during the curing process. If these tiny bubbles are not promptly addressed, they can lead to pinholes and blistering in the coating, affecting not only aesthetics but also reducing wear resistance and service life. Magnesium oxide (MgO), however, acts as an “invisible guardian” to solve this problem. It actively absorbs carbon dioxide, enabling “bubble-free curing” for polyurethane coatings. Among these, Messi Biology Co., Ltd.’s magnesium oxide products stand out as an industry preferred choice due to their technological advantages.
Micro-World “Carbon Capture”: How Magnesium Oxide Saves Coating Quality
The curing of polyurethane coatings is essentially a chemical reaction between isocyanates and polyols, a process that generates carbon dioxide. If the carbon dioxide cannot be expelled in time, it forms tiny bubbles within the coating. The addition of magnesium oxide actively “captures” this carbon dioxide through “chemical adsorption.” The active oxygen atoms on the surface of magnesium oxide combine with carbon dioxide to form stable magnesium carbonate, while also releasing water. This released water further promotes the cross-linking reaction of the polyurethane, forming a denser coating structure.
This process is akin to equipping the coating with a “miniature carbon treatment station.” On one hand, it eliminates the risk of bubbles, resulting in a smooth, flat coating surface, and enhancing wear resistance and impact performance. On the other hand, the magnesium carbonate formed during the reaction strengthens the adhesion between the coating and the substrate, extending the coating’s service life. Crucially, this “magnesium-based carbon fixation” method eliminates the need for volatile chemical additives, aligning with the trend of green coatings and avoiding the environmental risks associated with traditional defoaming agents.
“Messi” Magnesium Oxide: Customizing Solutions for Coating Industry Pain Points
Among numerous magnesium oxide products, Messi Biology Co., Ltd.’s offerings have become a benchmark for replacing imported products in the industry, thanks to their precise ability to meet the demands of polyurethane coatings. Their core advantages manifest in three key dimensions:
Firstly, precise control over high purity and low impurities. Polyurethane coatings demand extremely high purity from magnesium oxide, as impurities can disrupt the stability of the curing reaction. Messi Biology Co., Ltd., utilizing imported intelligent purification equipment, consistently controls magnesium oxide purity at over 99.9%, with heavy metal (lead, mercury, cadmium, etc.) residues below 5ppm, significantly lower than the EU REACH regulation’s 15ppm limit. Tests by a major coatings enterprise showed that after using Messi Biology’s magnesium oxide, the bubble rate during the coating’s curing process decreased from 8% to below 0.5%, and the coating’s qualification rate increased to 99.8%.
Secondly, customized adaptation of activity and particle size. Different types of polyurethane coatings (e.g., furniture paints, automotive refinish paints, industrial anti-corrosion paints) have significantly different requirements for magnesium oxide’s activity and particle size. Activity that is too low cannot efficiently absorb carbon, while excessively high activity might lead to an overly rapid curing speed; uneven particle size can affect coating dispersibility. Messi Biology Co., Ltd. has established an industry application laboratory that can precisely adjust magnesium oxide activity (iodine adsorption value) to 60-180mg/g and control D50 particle size within the 0.8-5μm range, according to customer coating formulations. They also offer nano-grade modified products to solve dispersion challenges in high-gloss coatings. Compared to general-purpose magnesium oxide, these customized products can improve coating curing efficiency by 20% and enhance coating weather resistance by 30%.
Finally, there is full-process compliance and stable supply. Messi Biology Co., Ltd.’s magnesium oxide has passed 23 international certifications, including FDA, REACH, and ROHS, fully meeting the compliance requirements for high-end coating exports—an advantage often unattainable by smaller manufacturers. Concurrently, relying on two major production bases in Xingtai, Hebei, and Zangqing Industrial Park, Tibet, the company boasts an annual capacity of 100,000 tons, enabling “72-hour nationwide delivery and 7-day global delivery.” This completely resolves the issues of unstable supply and long delivery cycles associated with imported magnesium oxide. The head of an export-oriented coatings company stated: “After switching to Messi Biology products, not only did raw material costs decrease by 18%, but we also avoided order losses caused by import disruptions.”
From the delicate coatings on furniture surfaces to the lasting luster of car bodies, magnesium oxide is safeguarding the quality of polyurethane coatings through its microscopic “carbon capture” ability. Messi Biology Co., Ltd., through technological innovation and customized services, ensures this “eco-friendly additive” better meets industry needs, both promoting the green upgrading of the coatings industry and injecting “mag-nificent” power into the quality enhancement of “Made in China” products.