Antioxidant 1520: A New Benchmark of Liquid Antioxidant, Leading the Green Revolution in Rubber Industry
In the field of synthetic rubber and polymer materials, oxidative aging remains a persistent challenge, causing performance degradation, appearance deterioration, and shortened service life. Traditional antioxidants face bottlenecks in efficiency, poor dispersibility, and environmental limitations. As a new-generation high-molecular-weight liquid antioxidant, Antioxidant 1520 (4,6-bis(octylthiomethyl)o-cresol) redefines the value standard of antioxidants with its core advantages of "high-efficiency protection" and "green transformation," becoming the ideal partner for materials such as polybutadiene rubber (BR), styrene-butadiene rubber (SBR), ethylene-propylene-diene monomer (EPDM), nitrile butadiene rubber (NBR), and thermoplastic elastomers (TPE).
I. Molecular Design Innovation: Full-Scene Adaptability of Liquid Antioxidant
As a high-molecular-weight liquid hindered phenolic antioxidant, the molecular structure of 1520 integrates phenolic hydroxyl active groups and octylthio methyl side chains:
Liquid Property: Transparent oily liquid at room temperature, with a viscosity of only 80-120 mPa·s (25°C). It can be rapidly mixed with rubber matrix at low temperatures (50-80°C) without solvents, improving dispersion efficiency by 40% and significantly reducing energy consumption and processing time.
Dual Antioxidant Mechanism: Phenolic hydroxyl groups capture alkyl free radicals (RO·, R·) to interrupt the oxidative chain reaction; thioether groups decompose hydroperoxides (ROOH) to form stable thioesters, achieving synergistic protection of "free radical capture + hydroperoxide decomposition". The antioxidant efficiency is 30% higher than that of traditional single-function antioxidants.
High Molecular Weight Advantage: With a molecular weight of 382.6 g/mol and a volatility of only 0.05% (150°C/24h), it retains over 95% of its activity during high-temperature processing (above 180°C), avoiding migration loss and precipitation risks of low-molecular-weight antioxidants.
II. Exclusive Solutions for Rubber Industry: Full-Cycle Performance Protection
1Processing Stage: Stabilizing Manufacturing and Improving Yield
Gel Inhibition Expert: Adding 0.1%-0.3% of Antioxidant 1520 during the polymerization and post-treatment of polybutadiene rubber can inhibit the formation of gel particles, narrowing the Mooney viscosity fluctuation range from ±15% to ±5%. This solves problems such as screen blockage and surface defects caused by gels during mixing.
Empowerment for Hot-Melt Adhesives and Adhesives: In SBR-based hot-melt adhesives, liquid 1520 shows excellent compatibility with tackifying resins. After long-term storage at 120°C for 3 months, the peel strength retention rate reaches 98%, far exceeding 85% of traditional solid antioxidants.
2Storage and Transportation: Resisting Environmental Erosion and Locking Original Performance
Color Stability Guardian: For styrene-butadiene rubber products stored in warehouses (25°C/60% RH) or transported under high-temperature and high-humidity marine environments, 1520 effectively inhibits the oxidative discoloration of styrene units. The yellowing index (YI) increases by <3 within 6 months, while the YI of untreated samples can increase by more than 15.
Molecular Weight Protector: In the storage of EPDM raw rubber, it prevents molecular weight degradation caused by oxidation, with the retention rate of weight-average molecular weight (Mw) exceeding 90% after 1 year, significantly better than 75% of traditional antioxidants.
3Long-Term Use: Long-Acting Antioxidation and Prolonging Service Life
Dynamic Fatigue Resistance: In NBR seals, when used with 0.2% phosphite (such as TNPP), after hot air aging at 120°C for 1000 hours, the tensile strength retention rate reaches 82%, and the elongation at break retention rate is 75%, which is 15%-20% better than single-agent systems.
Weather Resistance Upgrade: Used in TPE toy materials, after 1000 hours of xenon lamp aging, the surface has no cracks and the color difference ΔE<2, meeting the strict migration requirements of the EN71-3 toy safety standard.
III. In-Depth Applications in Multiple Fields: Unlocking New Boundaries of Antioxidation
1Automotive Industry: Full-Scene Performance Assurance
Tire Manufacturing: Adding 0.5% of Antioxidant 1520 to the tread compound of high-performance radial tires, combined with a nano-silica reinforcing system, can control the tread hardness change within ±3 Shore A after 300,000 km of driving, effectively delaying rubber aging and improving safety performance.
Interior Materials: Used in TPO materials for automotive dashboards, 1520 is compounded with ultraviolet absorbers. After aging tests at 80°C high temperature + 90% humidity for 2000 hours, it still maintains good surface gloss and scratch resistance, preventing interior fading and embrittlement.
2Electronics and Electrical Appliances: Precision Protection Needs
Wire and Cable: In PVC insulation layers, Antioxidant 1520 significantly improves the thermal stability of materials. After aging at 150°C for 168 hours, the insulation resistance retention rate reaches 92%, while effectively inhibiting hydrogen chloride gas generated during processing, meeting the requirements of RoHS environmental protection directives.
Connector Sealant: Applied to EPDM-based sealants, 1520 ensures that the sealant maintains good elasticity and sealing performance within the wide temperature range of -40°C to 125°C, preventing sealing failure caused by oxidation and ensuring the reliability of electronic equipment.
3Construction and Building Materials: Enhancement of Durability
Waterproof Materials: Adding 0.3% of Antioxidant 1520 to SBS modified asphalt waterproof rolls can enhance the weather resistance of the rolls. After 500 hours of artificial climate aging, the tensile strength retention rate exceeds 80%, effectively resisting the damage of environmental factors such as ultraviolet rays and ozone to materials.
Door and Window Seals: Used in EPDM seals, 1520 enables the seals to maintain good elasticity and compression set resistance after 5 years of outdoor exposure, ensuring the sealing and energy-saving effects of doors and windows.
4Sports Goods: Enhancement of Athletic Performance
Sports Shoe Soles: In TPU sole materials, Antioxidant 1520 works synergistically with wear-resistant additives to improve the wear resistance of soles by 20%, while maintaining good flexibility and fatigue resistance under frequent bending, extending service life.
Fitness Equipment Grips: Used in TPE grip materials, 1520 prevents oxidative discoloration and surface hardening of materials caused by sweat, friction, and other factors during long-term use, maintaining a comfortable grip and aesthetic appearance.
IV. New Choice for Green Manufacturing: Dual Advancement from Compliance to Sustainability
1Worry-Free Regulatory Compliance
Food Contact Safety: Certified by EU 10/2011 (migration limit 0.05 mg/kg), US FDA 21 CFR 178.2010 (permitted dosage ≤0.1%), and China GB 9685-2016, it can be used in rubber gaskets, seals, and other materials for food packaging.
Environmental Attributes: Non-amine structure, free of banned substances such as APEO and PFAS, with LC50 (fish) >1000 mg/L, complying with REACH-SVHC 233 control requirements, helping enterprises respond to global green trade barriers.
2Support for Industrial Upgrading
Formulation Simplification and Efficiency Enhancement: It can achieve basic antioxidant effects without relying on phosphites, reducing formulation costs by 10%-15%; if used in combination, the synergistic effect can reduce the total addition amount by 20%, with significant cost-performance advantages.
Adaptability to Circular Economy: In the recycling and reprocessing of waste rubber, the thermal stability and low migration of 1520 make its retention rate in recycled rubber exceed 80%, effectively improving the secondary processing performance of recycled materials, in line with the sustainable development needs under the "double carbon" goal.
V. Experience the New Era of Antioxidation Now: From Sample Testing to Customized Services
Choosing Antioxidant 1520 means not only selecting a high-efficiency antioxidant but also a full-cycle performance protection solution covering "processing-storage-application":