Five antioxidant products across three chemistries — sourced, quality-verified, and export-managed by SUNCHEM for global polymer manufacturers.
Polymer oxidation follows a chain reaction: heat, UV radiation, mechanical shear, or metal contamination generates free radicals, which react with oxygen and continue the chain. Left unchecked, this leads to yellowing, embrittlement, melt-flow changes, and surface degradation.
Antioxidants interrupt this process in one of two ways — primary antioxidants scavenge free radicals directly, while secondary antioxidants decompose the hydroperoxide intermediates that would otherwise reinitiate the chain. Most real-world polymer systems use both, in combination. See the full explanation in How Antioxidants Improve Polymer Stability.
Note: thioesters (DSTDP, DLTDP) are mechanistically also secondary antioxidants — hydroperoxide decomposers, the same functional role as phosphites like Antioxidant 168. They are shown as a separate branch here because that is the more buyer-navigable grouping, not because the underlying chemistry differs from the secondary-antioxidant family.
| Product | CAS No. | Branch | Mechanism | Best For | |
|---|---|---|---|---|---|
| Antioxidant 1010 | 6683-19-8 | Primary | Radical scavenger | Default primary choice; broad polyolefin / engineering plastic use | View → |
| Antioxidant 1076 | 2082-79-3 | Primary | Radical scavenger | Lower melting point (50–52°C) — easier handling/dispersion in some processes | View → |
| Antioxidant 168 | 31570-04-4 | Secondary | Hydroperoxide decomposer | High-temperature processing stability | View → |
| DSTDP | 693-36-7 | Thioester | Hydroperoxide decomposer | Cost-effective long-term thermal aging | View → |
| DLTDP | 123-28-4 | Thioester | Hydroperoxide decomposer | Alternative to DSTDP, different chain length | View → |
Compare products directly:
Using only a primary antioxidant leaves hydroperoxides to accumulate. Using only a secondary antioxidant does not scavenge radicals during processing. Combining a primary with a secondary or thioester option addresses both degradation pathways — this is why paired systems, not single additives, are the industry-standard approach for polyolefins.
Antioxidant 1010 + 168 — the most widely used polyolefin system. Antioxidant 1010 + DSTDP — a cost-effective long-term stabilization option in PP/PE. Antioxidant 1010 + 168 + HALS — full stabilization for outdoor applications (HALS addresses UV exposure and is outside this hub’s current product scope).
Both are primary hindered-phenolic antioxidants. The verified difference between them is structural and physical: Antioxidant 1010 is a tetra-functional ester with a higher melting point, while Antioxidant 1076 is a mono-functional ester with a lower melting point (50–52°C), which can make it easier to handle or disperse in certain processes. Contact SUNCHEM’s technical team to discuss which fits your specific processing conditions.
Primary (1010 or 1076) combined with a secondary or thioester antioxidant for processing and long-term stability.
Primary antioxidant plus a thioester (DSTDP/DLTDP) for long-term buried or outdoor service.
Primary antioxidant plus Antioxidant 168 for high processing-temperature stability.
Primary + secondary combination for heat-cycling resistance across long service life.
Low-volatility primary antioxidant grade is typically preferred.
Primary hindered-phenolic antioxidants support long-term thermal and oxidative stability.
We evaluate and qualify manufacturers across phenolic, phosphite, and thioester antioxidant chemistries.
COA, SDS, TDS, and export-related documentation coordinated for whichever product or combination you need.
Direct discussion of cross-product questions — choosing between 1010 and 1076, or building a primary+secondary system.
Consistent export documentation and shipping coordination across the full antioxidant range.
Tell us your polymer system, processing conditions, and application — SUNCHEM will help you choose between primary, secondary, and thioester options, then manage sourcing from requirement to delivery.
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