Long-lasting antioxidant performance at low dosage
Stable in high-temperature processing conditions
Compatible with multiple polymer types
Global technical support and compliance assured
As the name suggests, an antioxidant masterbatch is a functional additive masterbatch specifically designed to slow down or inhibit the oxidative degradation of polymers. It is mainly composed of carrier resin, antioxidants, dispersing agents, and other auxiliary additives.
At STANDARD, we not only offer not only antioxidants but also master batch formulations, including combinations of antioxidants with colorants, fillers, or other functional additives.
Plastics belong to high-molecular-weight polymers. Their molecular chains are highly susceptible to oxidative degradation during processing and use. This inherent characteristic leads to:
➤Yellowing, discoloration, loss of gloss, and cracking;
➤Becoming brittle, with decreased tensile and impact strength, and powdering;
➤Degradation of electrical insulation and reduced protective properties.
Therefore, to ensure a reasonable service life, all plastic products must incorporate antioxidants. This represents the most fundamental market demand: “preventing premature aging of plastics.”
According to our experience, antioxidant masterbatches are generally divided into two categories:
🟢 Primary antioxidants, such as multifunctional hindered phenols, capture free radicals and block chain reactions.
🟢 Secondary antioxidants, such as thioethers or aryl phosphites, decompose peroxides and often exhibit a synergistic effect when combined with primary antioxidants.
Many may ask: since antioxidants are essential, why not use them in powder form directly? The answer is simple—masterbatches offer more stable performance and greater convenience.
✅ Better dispersion – During production, antioxidants are melt-compounded under high shear and evenly distributed within the resin. The pellet form blends more uniformly with base polymers.
✅ Good to workers’ health – Powdered additives tend to create dust during handling, affecting both the environment and operators. Pelletized masterbatches significantly reduce dust exposure.
✅ Easier for accurate dosing – With automated feeding systems, masterbatches can be precisely dosed with base resins, ensuring stable formulations and more consistent product quality.
Antioxidant masterbatches are widely used in:
| Areas | Typical Examples |
| Automotive | flocked surfaces, bumpers, door panels |
| Agricultural | mulch films, irrigation pipes, seedling trays |
| Electronics | insulation part of wire and cable, housing appliance , sockets |
| Food and medical | thin-wall PET bottles, film packaging |
| Construction materials | outdoor furniture, pipes, profiles, waterproof membranes |
Choosing the right antioxidant masterbatch is crucial for achieving optimal protection and cost-effectiveness. Here are a few key considerations:
| Consideration | Key Point |
| Polymer type | Select a carrier resin compatible with the base polymer |
| Service environment | Match antioxidant functionality to the main aging factors |
| Compatibility | Ensure synergy with other additives in the formulation |
| Dosage | Balance effective protection with cost efficiency |
| Regulatory compliance | Can pass the applicable standards for the end-use sector |
Since 2009, STANDARD has been dedicated to the R&D of antioxidant masterbatches. Originating from U.S. laboratory formulations, our systems have been continuously optimized for over a decade, resulting in distinctive advantages:
➤Long-lasting antioxidant performance – multi-component antioxidant systems deliver stable protection at low dosages
➤High-temperature processing stability – suitable for injection molding, extrusion, blow molding, fiber spinning, film, nonwoven, and rotational molding processes
➤Wide polymer compatibility – from PE, PP, and PET to TPU, we provide tailored solutions
➤Compliance with international standards – capable of meeting food, medical, and environmental regulations
➤Global technical support – trusted by customers in over 50 countries with hands-on application guidance and service
With its outstanding performance and proven reliability, STANDARD antioxidant masterbatch is a supplier worth considering. Contact us for free samples and one-on-one technical consultation.
