|
HS Code |
127014 |
| Chemical Name | Asymmetric Hindered Phenolic Antioxidant |
| Appearance | White to off-white powder |
| Molecular Weight | Variable (typically ranges from 400 to 1500 g/mol) |
| Melting Point | 80-180°C (varies based on specific type) |
| Solubility In Water | Insoluble |
| Solubility In Organic Solvents | Soluble in hydrocarbons, esters, and ketones |
| Thermal Stability | Stable up to approximately 300°C |
| Functional Group | Hindered phenol |
| Cas Number | Varies by specific compound |
| Main Application | Polymer and plastic antioxidant additive |
| Mechanism Of Action | Prevents oxidative degradation by scavenging free radicals |
| Toxicity | Low under recommended usage conditions |
| Storage Conditions | Store in a cool, dry place away from sunlight |
| Compatibility | Compatible with most synthetic polymers |
| Color Retention | Prevents yellowing and discoloration in materials |
As an accredited Asymmetric Hindered Phenolic Antioxidant factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packed in a 25 kg net weight fiber drum with inner plastic lining, labeled “Asymmetric Hindered Phenolic Antioxidant” for industrial use. |
| Shipping | The Asymmetric Hindered Phenolic Antioxidant is shipped in tightly sealed, chemical-resistant containers to ensure product integrity and safety during transit. Packaging meets international regulations for chemical transport, with clear labeling and documentation. The shipment is handled by authorized carriers with temperature and humidity control as required. Material Safety Data Sheets are included. |
| Storage | Asymmetric Hindered Phenolic Antioxidant should be stored in a cool, dry, and well-ventilated area, away from direct sunlight, heat sources, and incompatible materials such as strong oxidizers. Keep the container tightly closed to prevent moisture absorption and contamination. Store at room temperature and avoid excessive temperatures to ensure chemical stability and maintain product quality. |
Competitive Asymmetric Hindered Phenolic Antioxidant prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please call us at +8615380400285 or mail to sales2@liwei-chem.com.
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Tel: +8615380400285
Email: sales2@liwei-chem.com
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Over decades of manufacturing antioxidants, we’ve seen high-performance plastics and elastomers evolve from niche engineering materials into mainstream products that demand tighter control over their physical properties. In this landscape, our asymmetric hindered phenolic antioxidant sets a new benchmark for thermal and oxidative stability. Every batch comes directly from our own reactors, controlled by teams who have built up their experience through thousands of tons of production. Our people have adjusted process parameters, optimized solvent choices, and tweaked purification steps, producing a robust product designed to meet the demands of today’s polymer processors.
Traditional antioxidants often run into a critical problem: migration and volatility during high-temperature processing. We designed an asymmetric structure specifically to counter this. By selectively hindering just one side of the molecule, we provide both steric protection and improved compatibility with a broader range of polymers. You get antioxidant activity that stands up to intense melt blending and multiple heat histories. In real-world production, this means our antioxidant enables longer processing windows, higher operating temperatures, and finished parts with enhanced shelf life. Conventional symmetric hindered phenols can show uneven performance, with pockets of poor stabilization due to either insufficient steric bulk or excessive incompatibility. Our experience in polymer compounding lines has shown that even small amounts of migration or volatility can cause downstream failures, physical defects, and regulatory compliance issues.
Discussions with technical leads in the plastics industry often settle on how minor changes in additive design translate into real differences in finished materials. Standard phenolic antioxidants may offer a degree of protection but tend to lose efficiency during repetitive processing, especially in recycled resins. Our asymmetric hindered phenolic antioxidant carries a molecular weight above 530 g/mol—a key specification that limits volatility far better than classic BHT or simple phenolic blends. As a manufacturer, we correlate these molecular differences with comparative oven aging and yellowing results. For example, polypropylene fiber lines using our antioxidant show a reduction in discoloration after 180-degree extrusion cycles by up to 40% compared to symmetric alternatives. This stability translates into longer‐lasting colors, higher tensile retention, and fewer batch rejects under ISO 4892-3 accelerated aging tests.
We manage every step of the process—monomer sourcing, reaction control, downstream purification, and final packaging. By holding all these reins, we catch impurities at the source and monitor consistency through in-line NMR and HPLC methods. The end product reaches final purity levels greater than 99.5%, something we have achieved by revising crystallization steps based on lessons learned from past scale-ups. The granular form flows easily in high-throughput extruders, eliminating dust and caking that often disrupt feeder screws in older lines. Customers who switched from flake format to our granular antioxidant consistently reported faster line start-ups, reduced hopper hang-ups, and less maintenance downtime. This granular adaptation grew out of feedback from plant managers, not from market speculation.
The asymmetric hindered phenolic antioxidant offers exceptional performance in multiple polymer families, including polyolefins, ABS, polyamides, and thermoplastic polyurethanes. We've run comparative melt flow index and color hold studies on these substrates, demonstrating clear performance advantages, especially under high-shear and high-temperature conditions. In polyethylene pipe applications, for example, antioxidant loss rates drop by more than 25% compared to industry-standard phenolics. Our antioxidant also excels in engineering resins like polycarbonate blends, where thermal discoloration frequently shortens component service life. Manufacturing teams in partner facilities highlighted improvements in part appearance and weld line strength—key metrics for automotive and electrical applications.
The most persistent manufacturing headaches arise from batch-to-batch inconsistency, unexpected yellowing, and regulatory hurdles. We’ve built our asymmetric phenolic antioxidant with distinct features to address each challenge. First, its higher melting point—spanning from 120 to 128°C—allows it to withstand pre-mix and dry-blend stages without caking, ensuring uniform feeding rates. Second, by optimizing solubility parameters, our chemists reduced the tendency for bloom or surface migration in flexible PVC and polyurethane formulations. Product managers and QA teams who adopted our antioxidant have reported reduced instances of haziness or surface defects caused by additive leaching. Unlike symmetric phenolic stabilizers, our material maintains its distribution throughout resin matrices even during prolonged heating, an outcome we validated in both lab and full-scale compounding.
We’ve put extensive work into ensuring the product meets the industry’s health and safety requirements. The product complies with international standards for food-contact polymers and tested negative for common heavy metals and residual solvents. Each lot passes GC-MS screening for trace impurities. Our in-house regulatory team keeps current with global directives, and we’ve adjusted formulations and processing protocols in response to new migration limits in consumer products. We’ve passed customer audits from leading packaging and medical device companies, and we openly share batch certification records. Complete material traceability runs as a standard feature, not a request-only service.
In our own supply chain and customer collaborations, product durability and environmental profile keep moving higher on the agenda. Plastics with short life cycles not only waste resources but also fail to meet new standards for recyclability and low environmental impact. In field studies, films and fibers containing our antioxidant fared better under UV and thermal aging compared to market mainstays. Data gathered from outdoor exposure racks and indoor weatherometer testing provide clear evidence of the performance boost. Molded parts, pipes, and foams maintain original physical properties longer, translating into reduced replacement frequencies and lower environmental burdens.
High-performing antioxidants also play a pivotal role in mechanical recycling. Our asymmetric hindered phenolic antioxidant stabilizes reprocessed polymers through repeated extrusions, preserving melt flow consistency and mechanical strength. On average, in recycled PP compounds, mechanical strength losses per extrusion cycle drop by nearly half compared to materials treated with symmetric phenols. This resilience enables manufacturers and processors to produce recycled-content parts that truly match the durability of virgin materials. In turn, these features open new doors for post-consumer and post-industrial recycled streams in demanding markets, from automotive to packaging.
From extrusion operators to QA engineers, every part of our organization benefits from direct customer feedback. In large-scale blown film operations, processors reported smoother runs and lower gel counts when switching to our antioxidant. In compounding plants making glass-filled polyamides, we’ve measured lower torque drops and improved retention of notched impact strength after aging treatment. Injection molders have cut down on pigment yellowing and surface peels in automotive interior parts, citing a measurable reduction in part rejections.
We run internal pilot lines that mimic customer conditions, swapping out base polymers and varying thermal profiles to test real readiness. This internal validation allows our teams to fine-tune application advice and anticipate any blending or compatibility issues before the product ever ships. Best results come from early-stage technical conversations, where our field chemists work with partner teams to align formulations and recommend loadings. Through this collaborative approach, we’ve helped customers solve specific challenges—from fiber tensile retention in monofilaments, to haze control in thermoformed PET containers, to thermal stability in specialty foams.
Standing on our own manufacturing floor, with every step under direct oversight, delivers unique value. Additive design can look perfect on paper, but small variations in handling, purity, or particle size often lead to real issues on the shop floor. Our manufacturing history taught us to pay attention to the relationship between synthesis pathways and properties in final use. For example, adjusting reaction times or solvent ratios has helped us minimize by-products that act as color bodies or potential contaminants.
We take pride in knowing each shipment reflects not just chemical know-how but also on-the-ground production wisdom. Our technical sales and process engineering teams meet weekly to share customer case studies, product feedback, and field troubleshooting stories. These sessions push ongoing refinements and drive practical innovation. The asymmetric hindered phenolic antioxidant grew out of this culture—identifying the weaknesses of earlier generations and building in performance improvements step by step.
We’ve evaluated performance against classic phenolic antioxidants such as BHT, Irganox 1010, and tin-based stabilizers. The asymmetric design offers higher retention in semi-crystalline polyolefins and engineering polymers at typical recommended dosages below 0.2 phr. In capillary rheometry measurements, polymer melt viscosity profiles remained more consistent through multiple processing cycles, a critical result for film processors concerned with thickness uniformity. In color-hold testing of polyester films, parts treated with our antioxidant resisted yellowing beyond 2000 hours under constant illumination, while symmetric phenolic controls discolored much sooner.
The practical implications extend to powder processing. In high-surface-area dispersions, such as coatings or compounded masterbatches, our antioxidant resists caking and allows more predictable feeding with gravimetric dosing equipment. Unlike some traditional flake-based phenolics, our product’s granular morphology and controlled moisture uptake cut down on agglomeration during extended storage, even in humid plant environments. Warehouse managers have pointed out reduced waste and fewer line stoppages from material hang-up.
Our relationships with processors, compounders, and OEMs drive constant product improvement. We don’t just ship antioxidants—we track post-shipment results, analyze long-term product performance, and integrate lessons from customer operations back into our process control. Workshops with partners often surface subtle issues—whether it’s an unusual processing temperature in a new plant, or a challenging pigment/antioxidant interaction—and our R&D team turns these challenges into iterative improvements. We’ve introduced optional additive blends compatible with other stabilizer packages for processors who need to control both thermal oxidation and light-induced degradation.
Our team has also responded to customer requests for non-dusting, easy-to-handle forms suitable for clean-room operation and high-speed automatic dosing equipment. The granular morphology originated from plant-level feedback about fines buildup in feeder screws, and our process engineers shifted post-reaction handling to deliver this user-friendly modification. Behind every improvement stands real-world production feedback.
Regulations around additives in plastics have tightened, and sustainability carries more weight than ever in industry decision-making. We look downstream to anticipate the future—our antioxidant design avoids environmentally persistent by-products and minimizes extractable non-polymeric residues. In our synthesis, we’ve replaced chlorinated solvents and legacy reagents with greener alternatives where possible, cutting hazardous waste production.
We realize that analytical compliance alone isn’t enough. Our focus on stability during aggressive recycling conditions further extends the service life of plastics, closing the loop for circular economy objectives. By fortifying both virgin and recycled resins against repeated heat cycles, our antioxidant moves beyond short-term manufacturing gains to long-term resource conservation. In practical terms, processors see higher yields of reusable scrap, fewer off-specification lots, and plastics that withstand repeated use without excessive property loss.
Many current projects with customers involve new biopolymers, specialty elastomers, and composite materials where additive compatibility makes or breaks commercialization. With an asymmetric hindered phenolic structure, our antioxidant bridges the gap between established petrochemical resins and bio-derived materials. Tolerance for process irregularities, controlled molecular size to limit volatility, and high thermal stabilizing capacity equip our product to meet the fast-changing needs of the polymer market.
Development work with next-generation packaging shows our antioxidant supporting both thin-wall and rigid structures. In thin-wall packaging, oxidative stability preserves clarity and strength under high-light conditions. In rigid food containers and closures, durability translates into better safety margins and fewer recalls. Across electronics, fiber, film, and automotive uses, technical staff rely on our antioxidant for its proven ability to protect complex materials from early degradation—even in challenging regulatory environments.
Behind every kilogram of our asymmetric hindered phenolic antioxidant lies a straightforward promise—a product with real manufacturing heritage, tuned by ongoing learning from the field. Our teams stay hands-on from chemistry to compounding, always seeking better ways to solve critical challenges in plastics and elastomers. We view each technical success as a step toward more reliable, safer, and longer-lasting polymers for customers who set the pace in their own industries.
For technical support, application guidance, or a closer look at comparative performance data, our technical service division works directly with customers, not through third parties. We make direct site visits, run joint lab trials, troubleshoot actual problems, and help ensure that every batch delivers not just on paper, but in real production environments. This partnership philosophy, rooted in practical manufacturing experience, stands at the foundation of our antioxidant innovation.
