антиоксидант 1010 против 1076 против 168: Choosing a Blend for PP and PE

For polypropylene (PP) and polyethylene (PE), антиоксидант 1010 или же 1076 can provide the primary phenolic component, в то время как антиоксидант 168 adds complementary processing protection. The useful comparison is usually 1010 + 168 versus 1076 + 168, rather than choosing one of the three in isolation. Select the package against your resin, processing history and finished-product requirements, then validate it in trials.

1. What each antioxidant does

Heat and oxygen can initiate oxidation during polymer processing and use. Radical reactions propagate degradation, while hydroperoxides formed along the way can decompose and generate more radicals. Depending on the material and exposure, the consequences can include discoloration, changing melt behavior and loss of mechanical properties.

Phenolic antioxidants interrupt the radical chain. Phosphites address hydroperoxides before they drive further degradation. These complementary mechanisms explain why a phenolic/phosphite package is a practical candidate for PP and PE. They do not make every combination equally effective.

антиоксидант 168 can help limit processing-related color and melt-flow changes, but those symptoms are not specific diagnoses. Resin variation, contamination, temperature and residence time also need investigation. Increasing an additive without finding the cause can leave the underlying problem unresolved.

2. Choosing between 1010 + 168 а также 1076 + 168

Consider 1010 + 168 when you need a phenolic/phosphite candidate for processing stability plus thermal-aging performance. The higher molecular weight of 1010 makes retention and low volatility relevant reasons to evaluate it. Those characteristics do not guarantee resistance to extraction or migration in every polymer, contact medium or service environment.

Consider 1076 + 168 when incorporation and compatibility are important formulation questions. The lower melting point of 1076 can be useful in some mixing and incorporation conditions. It does not prove faster or more uniform dispersion in every extruder, nor does it make 1076 a choice only for less demanding applications. Both phenolics merit assessment against the required performance.

For PP molding or extrusion, start with the approved resin grade and its existing stabilizer package. Record the melt-temperature profile, время пребывания, regrind content and expected heat exposure in service. For PE film, compare optical and surface requirements as well as processing stability. For PE pipe or other durable products, use the relevant product specification and aging requirements rather than transferring a film formulation unchanged.

Do not assume an unstabilized starting resin. Commercial resins and masterbatches may already contribute antioxidants, so the total formulation matters. Наполнители, pigments and other additives also belong in the trial record. When recycled material is involved, previous heat histories and variable feedstock make a controlled baseline especially important.

There is no universal loading or phenolic-to-phosphite ratio in this guide. Obtain a trial range appropriate to the resin and application, then compare candidates systematically. Replacing 1010 with the same mass of 1076, or adding more 168 to compensate for less phenolic, should be treated as a formulation change requiring validation.

These three antioxidants are not a complete answer to every exposure. Outdoor products need a separate assessment of light stabilization. Demanding heat-aging applications may justify evaluating additional co-stabilizers, including thioesters. Choose those additions against the complete application rather than assuming that more additive always improves performance. See the SUNCHEM antioxidant category guide for the available chemistry families.

3. Validate processing stability and service performance separately

A useful trial starts with a defined reference formulation and acceptance criteria. Keep resin lot, additive form, mixing procedure and machine settings comparable. If both the phenolic and phosphite levels change together, it becomes harder to identify which change affected the result.

1. Establish the baseline. Record the existing package, incoming resin properties, processing conditions and current failure mode. Keep samples and lot identification for comparison.
2. Check the processing result. Compare melt flow under the same specified test conditions, color and the application-relevant defects. Where repeat processing reflects production, compare the agreed number of passes rather than relying only on the first pass.
3. Check the finished article. Use relevant thermal-aging and mechanical-property retention tests. Add surface, odor, optical or contact-media assessments where the end use requires them.
4. Confirm the result beyond one sample. Set acceptance limits before supplier qualification and confirm that subsequent lots and production conditions remain within the agreed process window.

Oxidative-induction time (ОИТ) measured by differential scanning calorimetry can help compare stabilization under controlled conditions. ASTM D3895 describes an OIT method for stabilized polyolefins and cautions about interpreting accelerated results. Record the method and test conditions whenever comparing values.

A longer OIT result is not, by itself, a prediction of years in service. Температура, additive behavior and test conditions affect the result. Use OIT alongside the relevant product qualification tests; do not replace an application's aging or compliance assessment with one laboratory number.

4. What to include in an antioxidant RFQ

When sourcing from China, compare quotations against the same specification, физическая форма, packaging and delivery terms. A generic product name identifies the chemistry, not the full quality agreement. Ask who is responsible for supplying the grade and resolving a batch discrepancy; avoid assuming that a trading company and a manufacturer provide identical services.

• Приложение: PP or PE grade, film/fiber/molding/extrusion use, virgin or recycled content, current additive package and the problem to solve.
• Processing and service: melt conditions, время пребывания, repeated processing, expected exposure and the tests required for acceptance.
• Спецификация: product name and CAS number, физическая форма, applicable assay method and limits, диапазон плавления, volatile matter and relevant color measurements. Confirm which parameters apply to the quoted grade.
• Batch evidence: a lot-specific certificate of analysis (сертификат подлинности) with results, units and method references. Distinguish guaranteed limits from typical technical-data-sheet values.
• Документация: current technical data sheet (ТДС), safety data sheet (паспорт безопасности), and application- and market-specific declarations where needed. Confirm availability for the exact grade.
• Supply details: trial and commercial quantities, упаковка, место назначения, delivery terms, storage instructions and the stated shelf-life conditions.

For food-contact applications, do not treat a substance name, CAS number or generic declaration as approval for the finished article. Confirm the applicable market requirements, grade documentation, intended conditions of use and necessary finished-article assessment before adoption.

Keep unopened and part-used material under the supplier's specified storage conditions. Moisture protection remains relevant for phosphites; a hydrolysis-resistance description is not permission to leave packaging open. Confirm how storage time and handling will be controlled before qualifying a supply route.

For additional context, read how to evaluate an antioxidant supplier а также the different roles of 1010 а также 168. Use your agreed specification and application trials for the final decision.

This educational guide was prepared with AI assistance. It does not provide a validated formulation or replace application-specific testing.