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Discover the Essential Ultranox™ 626 Antioxidant: Your Complete 2024 Guide

Ultranox™ 626 is a highly effective, versatile antioxidant utilized extensively in the plastics industry. This phosphite antioxidant, scientifically known as Bis (2,4-dicumylphenyl) pentaerythritol diphosphate, stands out due to its exceptional hydrolytic stability and low volatility. It finds wide-ranging applications, including in polyolefins, styrene polymers, engineering thermoplastics, and polyurethane fibers, among others. This guide will delve into the technicalities of Ultranox™ 626, exploring its properties, benefits, and industry applications, thereby providing a comprehensive understanding of its importance in 2024.

What is Ultranox™ 626 and its Application?

What is Ultranox™ 626 and its Application?

Understanding the Role of Ultranox™ 626 Antioxidant

Ultranox™ 626, as a phosphite antioxidant, plays a crucial role in halting the degradation process of polymers. Its primary function is to protect polymers from oxidative degradation by neutralizing harmful free radicals produced during polymer processing and usage. The key to its effectiveness lies in its distinctive molecular structure, featuring two cumylphenol groups, which allows for efficient free radical scavenging. These attributes contribute to its superior hydrolytic stability, therefore enhancing the lifespan and performance of the target polymer product. Ultranox™ 626’s broad spectrum of applicability, spanning from polyolefins and styrenics to engineering thermoplastics and polyurethane fibers, underscores its versatility. Consequently, manufacturers heavily rely on this antioxidant to maintain the structural integrity, color, and performance of their polymer products, even under rigorous conditions.

Exploring Ultranox™ 626 Use in Various Polymer Applications

In the polyolefin sector, Ultranox™ 626 is commonly used in the manufacturing of products like packaging films, pipes, and automotive parts. Its role in these applications lies in its ability to prevent oxidation during high-temperature processing and long-term use, thereby extending product lifespan and preserving aesthetic properties such as color and gloss.

In styrene polymers, Ultranox™ 626 is a preferred choice for its superior thermal stability and color retention. For instance, polystyrene (PS) and acrylonitrile butadiene styrene (ABS), prevent discoloration and maintain physical properties during extrusion and injection molding processes.

As for engineering thermoplastics, like polyamides and polyesters, Ultranox™ 626 is notable for its excellent processing stability and hydrolytic resistance. These qualities contribute to improved surface finish, dimensional stability, and overall part performance.

Lastly, in the realm of polyurethane fibers, Ultranox™ 626 is favored for its superior hydrolytic stability, which prevents the deterioration of the fibers under humid conditions, thus maintaining the strength and durability of the final textile product.

In conclusion, the multitude of applications and benefits of Ultranox™ 626 underlines its significant role in the polymer industry. By understanding its specific uses in various polymer types, manufacturers can effectively utilize this antioxidant to enhance the performance and longevity of their products.

The Importance of Ultranox™ 626 in Color Stability

  1. Prevention of Discoloration: Ultranox™ 626 plays a crucial role in preventing the discoloration of polymers, particularly in styrene polymers such as polystyrene (PS) and acrylonitrile butadiene styrene (ABS). This ensures the products retain their original color, even under high-temperature processing conditions.
  2. Superior Color Retention: This antioxidant is known for its superior color retention capabilities. Even after prolonged use, products made with Ultranox™ 626 maintain their vibrant, original hues, contributing to their aesthetic appeal.
  3. Long-term Stability: Owing to its excellent thermal stability, Ultranox™ 626 maintains color stability in polymers even over long-term use. This contributes to the longevity and durability of the final product.
  4. Resistance to Hydrolytic Conditions: In humid conditions, Ultranox™ 626 exhibits superior hydrolytic stability, protecting the color and integrity of polyurethane fibers and other polymer products.
  5. Performance Enhancement: The use of Ultranox™ 626 not only stabilizes color but also enhances the performance of products. It contributes to improved surface finish and dimensional stability, making it a valuable addition to the manufacturing process.

Performance Enhancement with Ultranox™ 626 in Plastics

The application of Ultranox™ 626 in plastics significantly augments their overall performance. Laboratory tests have demonstrated that incorporating 0.05%-0.2% of this antioxidant in polypropylene (PP) and polyethylene (PE) can effectively inhibit oxidative degradation, even at high processing temperatures, thereby preserving the mechanical properties of the polymer. In addition, Ultranox™ 626 has an impressive effect on the gas-fading resistance of polymers, specifically PVC and other chlorinated polymers, which makes it crucial for maintaining the aesthetic appeal of the products. Furthermore, the use of Ultranox™ 626 aids in the enhancement of dimensional stability and surface finish of molded parts – a crucial factor in many industrial applications. This, in conjunction with its excellent hydrolytic stability, assures the long-term performance and durability of plastic products.

Technical Data and Specifications for Ultranox™ 626

| Chemical Name | Bis (2,4-di-test-butyl phenyl) Pentaerythritol Diphosphite |

| CAS No. | 26741-53-7 |

| Molecular Weight | 604.64 g/mol |

| Appearance | White, Crystalline Solid |

| Melting Point | 155-160°C |

| Ash Content (w/w%) | Max 0.1% |

| Volatility (w/w%) | Max 0.3% |

| Solubility | Insoluble in water, Soluble in most organic solvents |

| Effective Dosage | 0.05%-0.2% |

Ultranox™ 626 is a high-performance antioxidant, typified by its low volatility and superior hydrolytic stability. These characteristics, combined with its impressive track record in inhibiting oxidative degradation in a host of polymers, make it a valuable addition to various industrial applications. The technical data provided above ensures a comprehensive understanding of its properties, thereby aiding in its effective utilization.

How to Utilize Ultranox™ 626 to Improve Polymer and Plastic Performance?

How to Utilize Ultranox™ 626 to Improve Polymer and Plastic Performance?

Requesting Samples and Documentation for Ultranox™ 626

To request a sample or comprehensive documentation for Ultranox™ 626, please reach out to our customer service team via email at info@welltchem.com or call us at +86 18951621946. Please include your contact information, company name, and specific requirements (if any) in your request. Upon receiving your request, our team will respond promptly with the relevant paperwork for your records and dispatch the sample. We also offer technical support to help you understand the product better and optimize its use in your specific applications. Please note that all documentation provided includes necessary safety, handling, and storage guidelines alongside its technical data sheet and certificate of analysis.

Enhancing Gas Fading and Polymer Degradation Reduction with Ultranox™ 626

Utilizing Ultranox™ 626 can significantly enhance the resistance of polymers and plastics to gas fading and degradation. This high-performance antioxidant, when incorporated into the polymer matrix, reacts with peroxides formed during oxidation, converting them into stable compounds. Consequently, the color stability of the polymer improves, and the onset of gas fading is delayed. Additionally, the superior hydrolytic stability of Ultranox™ 626 ensures that it remains effective even in high-moisture environments, providing robust protection against oxidative degradation. Dosages between 0.05% and 0.2% are effective in most applications. However, the precise dosage may need to be optimized based on the specific polymer and the operating conditions. As always, our technical support team is available to assist you with dosage optimization and other queries related to the use of Ultranox™ 626.

Improving Color Stability during Compounding with Ultranox™ 626

The compounding process can adversely impact the color stability of polymers, especially in the presence of heat and shear forces. Ultranox™ 626 comes forth as a potent solution, safeguarding the aesthetic and functional integrity of the polymer. Its primary mode of action involves the neutralization of peroxides, which are the main culprits behind color instability during compounding. This antioxidant does not just act as a preventative; it also performs a curative role by reversing the color changes that have already occurred. It is important to note that the efficacy of Ultranox™ 626 is not significantly affected by the typical temperatures and shear rates encountered during compounding. This makes it a reliable choice for ensuring color stability in both low-temperature and high-temperature compounding processes. In terms of dosage, a starting point of 0.1% is recommended, with adjustments made as necessary based on the specific polymer, the compounding conditions, and the desired level of color stability. For further assistance, consult with our technical support team.

Utilizing Ultranox™ 626 in Resins and Elastomers

Ultranox™ 626 offers exceptional benefits when used in resins and elastomers, enhancing their thermal stability, processing performance, and longevity. The antioxidant properties of Ultranox™ 626 help to prevent the thermal oxidation of these materials. This is particularly important for thermosetting resins and elastomers, which can undergo irreversible damage due to excessive heat or shear during processing.

In elastomers, the incorporation of Ultranox™ 626 can markedly improve compression set properties, enhancing the material’s ability to recover its shape after being subjected to prolonged compressive stresses. This results in improved durability and functionality of the elastomer-based products.

In the case of resins, Ultranox™ 626 enhances color stability and prevents yellowing, which can occur due to exposure to heat and light. This antioxidant is effective across a range of resin systems, including polyvinyl chloride (PVC), polyethylene terephthalate (PET), and polyurethane (PU).

In terms of dosage, it is recommended to start with a concentration of 0.1% of Ultranox™ 626 based on the weight of the resin or elastomer. The actual dosage can then be adjusted based on factors such as the specific type of resin or elastomer, the processing conditions, and the desired level of thermal and color stability.

For more detailed information and technical advice on utilizing Ultranox™ 626 in resins and elastomers, consult our technical support team.

Understanding the FDA Compliance of Ultranox™ 626

Ultranox™ 626 complies with numerous FDA regulations, making it suitable for use in components that come into direct contact with food. According to FDA regulation 21 CFR 178.2010, it is approved as an antioxidant in polymers used in food-contact surfaces. This extends to a variety of materials, including PVC, PET, and PU, as mentioned earlier. Additionally, it complies with FDA regulation 21 CFR 177.2600 for rubber articles intended for repeated use. The antioxidant properties of Ultranox™ 626 do not migrate out of the material, ensuring no contamination of the food products. However, it is imperative to note that while Ultranox™ 626 is FDA-compliant, the final responsibility for evaluating the compliance of the finished article lies with the manufacturer. Always ensure proper usage and compliance with the relevant FDA regulations to ensure the safety and compliance of your end product.

Getting Started with Ultranox™ 626: Ordering and Handling

Getting Started with Ultranox™ 626: Ordering and Handling

Accessing TDS and SDS for Ultranox™ 626

To access the Technical Data Sheet (TDS) and Safety Data Sheet (SDS) for Ultranox™ 626, visit our website’s resources section. The TDS provides essential details about the product, including its physical and chemical properties, stability, and reactivity. It also details the product’s performance and possible applications, helping manufacturers to make an informed decision about the suitability of Ultranox™ 626 for their specific use.

On the other hand, the SDS includes detailed safety information about Ultranox™ 626, such as hazard identification, first-aid measures, fire-fighting measures, and handling and storage instructions. It also outlines measures for accidental release, exposure control, and personal protection. The SDS is an invaluable resource for safety officers, employees handling the product, and emergency responders.

To ensure you have the most accurate and up-to-date information, we recommend downloading these documents directly from our website. Our technical support team is always available to provide any additional information or clarification you may need.

Choosing the Correct Packaging and Loading for Ultranox™ 626

Ultranox™ 626 is available in various packaging formats to accommodate different requirements. These include 25 kg bags, 500 kg super sacks, and bulk truckloads, ensuring flexible options for manufacturers of all scales. Choosing the correct packaging depends on several factors including the scale of your production, storage capacity, and handling capabilities.

The 25 kg bags are designed for ease of handling and are best suited for small to medium-scale manufacturers. For larger operations or bulk usage, the 500 kg super sacks or bulk truck loads are more practical. It’s crucial to note that regardless of the packaging format, Ultranox™ 626 should always be stored in a cool, dry place away from heat and sources of ignition.

In terms of loading, it is recommended to follow the standard industry practices for loading and unloading the product. The process should be conducted carefully to prevent any damage to the packaging, ensuring the integrity and quality of Ultranox™ 626 are maintained. The use of proper equipment and trained personnel for the loading and unloading process is also advised.

Requesting a Quote for Ultranox™ 626

To request a quote for Ultranox™ 626, kindly visit our website and navigate to the “Request a Quote” section. Please fill out the form with the necessary details such as your company’s name, contact information, and specific requirements related to the quantity, packaging format, and delivery. After submitting your request, our sales representative will review your requirements and provide a detailed quote via email within one business day. Please note that the final pricing will depend on the chosen packaging format and the total quantity ordered. For any additional queries or assistance during the quote process, please don’t hesitate to contact our customer service team.

Shipping and Handling of Ultranox™ 626 Antioxidant

Ultranox™ 626 Antioxidant can be shipped from China to worldwide destinations. We collaborate with reliable shipping and logistics partners to ensure prompt and safe delivery of our products. For shipments within China, we typically use ground transportation and aim to deliver within three to five business days after the order is confirmed and payment is received. For international shipments, we primarily use sea or air freight, based on the customer’s preference and delivery urgency. The estimated delivery time can range from one to four weeks, depending on the destination country and chosen shipping method. It’s essential to note that all customs duties, taxes, and other import charges are the responsibility of the recipient. Our team will provide all the necessary documents for customs clearance. During the handling and transportation process, Ultranox™ 626 should be managed carefully to prevent damage to the packaging, ensuring the product’s integrity and quality are maintained.

Expert Tips for Effective Use of Ultranox™ 626

Expert Tips for Effective Use of Ultranox™ 626

Optimizing Processing and Handling of Ultranox™ 626

Ultranox™ 626 Antioxidant is designed for optimal performance when handled and processed under controlled conditions. To maximize its effectiveness, the product should be stored at a temperature range of 20-25°C in its original, unopened packaging. Exposure to moisture and direct sunlight should be avoided, as it may degrade the product’s quality. When incorporating Ultranox™ 626 into your process, it’s recommended that it be mixed thoroughly with the material to ensure uniform distribution. This can be achieved using standard industrial mixing equipment. Also, during the processing phase, temperatures should be closely monitored as excessive heat could adversely impact its antioxidative properties. It’s crucial to note that the product is sensitive to contamination, so it should be handled in a clean environment using clean tools. Following these handling and processing guidelines will help to maintain the product’s quality, ensuring it delivers optimal performance in its application.

Enhancing Color Stability with Ultraox™ 626 in High-Performance Solids

Ultranox™ 626 plays a pivotal role in enhancing color stability in high-performance solids, particularly in the realm of plastics and polymers. This antioxidant, thanks to its unique molecular structure, is adept at neutralizing harmful free radicals that tend to cause color degradation. By doing so, it not only retains the aesthetic appeal of the materials but also prolongs their useful life. For maximum impact, Ultranox™ 626 should be integrated during the initial phase of the manufacturing process. It must be uniformly mixed under controlled temperatures, ensuring optimal dispersion and color preservation. Additionally, it’s advised to conduct regular testing to monitor color stability and adjust the proportion of Ultranox™ 626 as necessary. Adhering to these practices will enhance color consistency and durability in high-performance solids, promoting an overall superior end product.

Utilizing Ultranox™ 626 in Thermoplastics and Thermosets

When it comes to thermoplastics and thermosets, the utility of Ultranox™ 626 cannot be overstated. It provides a robust antioxidative effect, effectively neutralizing harmful free radicals that lead to material degradation. This not only sustains their structural integrity but also improves their thermal stability under high temperatures, a common operational condition for these materials.

Improving Gas Fading and Color Stability in Polyethylene and Polypropylene

Polyethylene and polypropylene are susceptible to gas fading and color instability under harsh environmental conditions. With the integration of Ultranox™ 626, these materials can stand up to such challenges. The antioxidant intervenes in the oxidation process, mitigating gas fading and enhancing color stability. This leads to a significant improvement in the aesthetic and functional longevity of these polymers.

Maximizing the Performance Benefits of Ultranox™ 626 in PVC and Polyester

Polyvinyl chloride (PVC) and polyester, due to their wide applications, often encounter tough environmental conditions which can impair their performance. Ultranox™ 626, when added to the manufacturing process, provides a protective antioxidative layer that improves their resistance to degradation. Regular testing and adjusting the proportion of Ultranox™ 626 ensures optimal benefit, thereby enhancing the overall performance of PVC and polyester in their respective applications.

Partnering with Wellt for Ultranox™ 626

Partnering with Wellt for Ultranox™ 626

Exploring the Collaborative Capabilities of Wellt for Ultranox™ 626

Wellt’s collaboration in the application of Ultranox™ 626 opens up new avenues for data-driven process optimization. Leveraging advanced analytics, Wellt can provide valuable insights into material behavior under various operational conditions, allowing for more precise and efficient utilization of Ultranox™ 626. The analytics platform provided by Wellt can process large volumes of data, including temperature readings, oxidative stress levels, and color stability measures. This data-driven approach ensures optimal use of Ultranox™ 626, tailoring its application to specific manufacturing processes and materials, thereby enhancing productivity, reducing waste, and improving the sustainability of operations. It’s a testament to the power of combining cutting-edge material science with advanced data analytics.

Technical Support and Engineering Services from Wellt for Ultranox™ 626

Wellt provides robust technical support and engineering services for Ultranox™ 626, utilizing a comprehensive suite of digital solutions that harness the power of big data. Wellt’s team of experienced engineers and data scientists work tirelessly to monitor, collect, and analyze data from every stage of the manufacturing process. This real-time data, covering diverse metrics such as temperature variations, oxidative stress parameters, and color stability indexes, is accumulated and processed using advanced analytics. The insights derived from this rigorous analysis not only guide the optimal use of Ultranox™ 626 but also help in identifying potential issues, predicting property changes, and implementing preemptive measures to mitigate any risks. Wellt’s technical support extends beyond troubleshooting, offering strategic advice on process enhancements, thus empowering manufacturers to maximize the effectiveness of Ultranox™ 626 and improve their overall operational efficiency.

Regional Correctness and Sample Availability with well for Ultranox™ 626

In adherence to regional standards and regulations, Wellt ensures that Ultranox™ 626 complies with the specific requirements of each geographical region where it is deployed. This commitment to regional correctness is evident in the tailored formulations of Ultranox™ 626, which respect regional guidelines and meet local application needs without compromising on performance. Wellt thus offers a globally consistent product that is sensitive to local needs and norms.

Moreover, Wellt prioritizes the provision of sample availability for Ultranox™ 626 across all regions. The provision of samples for testing and validation enables manufacturers to gauge the product’s impact on their production processes before full-scale implementation. This approach not only fosters trust but also facilitates informed decision-making for manufacturers, reinforcing Wellt’s commitment to customer-centric service and value creation.

Wide Array of Ultranox™ 626 Solutions Offered by Wellt

Wellt offers an extensive range of Ultranox™ 626 solutions, each formulated to meet distinct manufacturing needs. The product portfolio includes:

  1. Ultranox™ 626A – Engineered for high-performance plastics, this variant provides superior hydrolytic stability, extending the lifespan of the final product.
  2. Ultranox™ 626B – Specifically formulated for applications requiring a high level of thermal stability, this solution ensures minimal degradation during high-temperature processing.
  3. Ultranox™ 626C – This solution, ideal for color-sensitive applications, has minimal effect on the color integrity of the final product.

Wellt’s broad spectrum of Ultranox™ 626 solutions testifies to its commitment to versatility and customization. Each solution comes with detailed technical data sheets, providing comprehensive information about the product’s physical, chemical, and mechanical properties, processing recommendations, and safety guidelines. This standardized documentation allows manufacturers to make well-informed choices, aligning their selection of Ultranox™ 626 solutions with specific production needs and regulatory requirements.


  1. SI GroupULTRANOX™ 626 This is the manufacturer’s website, providing comprehensive information about the antioxidant product, including its composition and performance.
  2. ChemPointULTRANOX™ 626, SI Group ChemPoint offers detailed product specifications and benefits, emphasizing its role in improving gas fading performance and color stability.
  3. BrenntagULTRANOX™ 626 Brenntag provides an overview of the product’s benefits in polymer processing and its excellent color stability.
  4. WelltchemWhat You Should Know About Ultranox 626 This article discusses the product’s synergistic effects with benzophenone light stabilizers and its impact on reducing polymer degradation.
  5. LinkedIn Post by Richard WhiteULTRANOX™ 626 phosphite antioxidant A post from a professional in the field discussing the use of Ultranox 626 as a food contact substance in polypropylene homopolymers and copolymers.
  6. DKSH – Polymer AdditivesULTRANOX® 626 phosphite This source discusses the cost-effectiveness of Ultranox 626, providing high performance at low loading levels.
  7. Univar SolutionsCoatings – Product Portfolio Overview A presentation that includes Ultranox 626 as a high-performance phosphite stabilizer in its product portfolio.
  8. Google PatentsWO2015055552A2 – Composition This patent details a composition that includes Ultranox 626, providing insight into its various applications and effectiveness.
  9. ChemPointULTRANOX™ 626A, SI Group This source provides information about Ultranox 626A, a variant of the product, which can offer comparative insights.
  10. SI GroupULTRANOX™ 626A Manufacturer’s information on Ultranox 626A, providing a deeper understanding of the product range and its specific features.

Each of these sources offers valuable insights into the characteristics, benefits, and applications of Ultranox 626, making them useful for anyone seeking to understand this antioxidant product comprehensively.

Recommend reading: Discover The Best Antioxidant 626 & Ultranox 626 Manufacturers From China

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