Stability Shield for PU - Everaox 501 Heat Stabilizer's Innovative Technology

Polyurethane materials play a crucial role in modern industrial and daily applications, yet thermal stability remains a persistent challenge for manufacturers. This article introduces how Everlight Chemical's breakthrough Everaox® 501 heat stabilizer addresses this industry pain point, delivering comprehensive thermal oxidation protection while maintaining production efficiency and product quality.

 

 

Polyurethane: The Paradigm of Elasticity and Durability

 

Polyurethane (PU) has become essential across numerous industries due to its excellent elasticity, strength, abrasion resistance, and processing flexibility. Applications span from sports shoe soles and automotive interiors to industrial conveyor belts and construction foams, covering both consumer and precision industrial markets. Polyurethane divides into two main categories:  thermoset polyurethane (traditional PU) and thermoplastic polyurethane (TPU). Thermoset PU cannot be remelted once formed, while TPU can be repeatedly processed, offering greater flexibility. By adjusting hard and soft segment ratios, PU exhibits diverse mechanical and physical properties to meet various precision and elasticity requirements.

 

The global polyurethane market continues steady growth with substantial momentum expected in coming years. As demand for high-performance materials increases across construction, automotive, packaging, and consumer goods industries, polyurethane has become indispensable due to its superior performance characteristics. In this rapidly developing market, product stability is now the decisive factor for quality differentiation and competitive advantage.

 

 

Polyurethane (PU) has become a key material across numerous industries due to its excellent elasticity, strength, abrasion resistance, and processing flexibility

 

 

The Dual Challenge of High Temperature and Oxidation

 

Despite excellent performance, polyurethane is susceptible to degradation and discoloration under heat and oxygen exposure. During injection molding or high-temperature processing, thermoplastic polyurethane (TPU) readily yellows due to high-temperature oxidation. In polyurethane foam manufacturing, excessive internal reaction heat can cause "core burning" ,leading to foam center carbonization and compromising product structure and quality stability.

 

Research shows untreated TPU under high-temperature processing readily exhibits significant yellowing with rapidly increasing yellowness index. During large-scale polyurethane foam production, if internal temperatures are excessive and heat cannot dissipate effectively, "core burning" severely impacts product quality, significantly increasing scrap rates and causing substantial production losses and resource waste. These high-temperature issues have become critical challenges requiring urgent industry solutions.

 

Furthermore, polyurethane products during storage and use are exposed long-term to air and nitrogen oxide (NOx) ,causing appearance yellowing that impacts market acceptance and brand image. NOx sources are widespread, including industrial emissions, vehicle exhaust, and environmental pollutants. These substances rapidly react with amino groups and ether bonds in polyurethane structures, accelerating photo-oxidative degradation processes. Even indoors, trace NOx from air conditioning and electronics accumulate over time, causing gradual uneven yellowing in polyurethane products—particularly noticeable in light-colored or transparent items, significantly reducing aesthetics and commercial value.

 

 

PU/TPU products are prone to yellowing due to high-temperature oxidation

 

 

Limitations of Traditional Solutions

 

To address these issues, traditional approaches commonly use basic antioxidants or anti-yellowing additives, combined with rapid packaging and light-protected storage to minimize oxygen and heat contact. However, these methods mostly "treat symptoms rather than root causes," making stability difficult to ensure for precision processes or long-term storage applications.

 

 

Everaox® 501 － Comprehensive Upgraded Heat Stabilization Solution

 

Targeting polyurethane thermal stability pain points, Everlight Chemical developed Everaox® 501 Heat Stabilizer, providing a liquid formulation that combines high performance with ease of use. Everaox® 501 Heat Stabilizer is specifically designed for thermal oxidation stability during processing stages and long-term durability of finished products, particularly suitable for injection TPU, PU foam, and applications with strict color stability requirements.

 

 

Everaox® 501 － The Key Step to Initiating Polyurethane Stability Upgrades

 

In pursuing high-quality and high-stability polyurethane product applications, Everaox® 501 Heat Stabilizer provides not just a heat stabilizer, but a complete stability solution. It not only assists manufacturers in overcoming challenges posed by high temperature and oxidation during processing, but also strengthens product stability and appearance performance during storage and final use stages.

 

Everlight Chemical, leveraging decades of specialty chemical R&D experience, possesses extensive patent portfolios and technical knowledge in polyurethane stability technology, dedicated to providing innovative solutions that balance performance, efficiency, and environmental protection. We not only provide high-quality products, but also simultaneously offer comprehensive technical consultation and formulation recommendations from molecular design to end applications, helping customers tailor optimal application strategies and jointly solve complex processing challenges.

 

If you have any requirements for Everaox® 501 Heat Stabilizer or other polyurethane application stability solutions, please feel free to contact Everlight Chemical's technical service team at any time. We look forward to becoming your trusted partner in advancing material upgrades, jointly creating more stable and competitive product value.

 

 

 

 

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