Tiangang® AO-1010

What it is

Tiangang® AO-1010 is a antioxidant. Antioxidants come in two roles. Primary antioxidants (hindered phenols) trap radicals and stop the chain; secondary antioxidants (phosphites) decompose hydroperoxides. Used together they cover both processing and service life. Product identifiers: chemical name Pentaerythritol Tetrakis(3-(3,5-di-tert-butyl-4-hydroxypheny; CAS 6683-19-8; molecular weight 1178; melting point 100 – 125.

Technical data

Chemical name	Pentaerythritol Tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate)
CAS number	6683-19-8
Structure
Molecular Weight	1178 g/mol
Description	Tiangang® AO-1010 is a sterically hindered phenolic antioxidant, which is a highly effective, non-discoloring processing and long-term heat stabilizer for organic substrates such as plaqstics, synthetic fibers, elastomers, adhesives, waxes, oils and fats. It protects these substrates against thermo-oxidative degradation. This product can be applied a range of polymers, such as polyolefins, POM, PA, PU, PET, PBT, PVC, ABS, SBS, SEBS, EPDM, PS, synthetic rubbers, adhesives and so on. Tiangang® AO-1010 features good compatibility, high resistance to extraction and low volatility. Dosing level can be about 0.05% to 0.1%.

Molecular weight around 1178 — high-MW territory: little volatilisation or migration, which suits long-service outdoor or hot-processing systems, at the cost of slower dispersion.Melting point 100 – 125 °C — the processing window needs to reach above it for uniform dispersion.

Where it is used, and at what loading

Polyolefins are the main field, followed by polyacetal, polyamide, polyester, PVC, polystyrene and elastomers. The higher the melt temperature and the longer the residence time, the more the system needs.

Figures above are typical industry ranges, not guaranteed values. The actual loading depends on wall thickness, design life and the other additives in the system, and should be established by a loading ladder on the real formulation.

Choosing between similar grades

Three things decide the choice for AO-1010: molecular weight and volatility, basicity, and compatibility with the other components in the system. Grade 1010 is a tetrafunctional hindered phenol with good extraction resistance and low initial colour. It needs a phosphite such as 168 alongside it to cover both processing and service life.

Frequently asked questions

Do primary and secondary antioxidants have to be used together?

In most cases yes. The primary handles radicals, the secondary handles hydroperoxides; using only one leaves the other degradation path open. Blends such as B215, B225 and B277 pre-mix the two, which removes weighing error at the line.

Why does low initial colour matter?

Some phenolic antioxidants form quinoid structures during processing and yellow the part. Fibre, film and light-coloured articles are most sensitive. Low-colour grades suppress that side reaction at the source.

Can antioxidants and light stabilizers interfere?

Yes, mainly through acid-base conflict. Acidic components (some phosphites, halogenated flame retardants) deactivate highly basic HALS. We look at both sides of the balance and switch to a low-basicity HALS where needed.

The figures and guidance above follow Tiangang's published technical material and common industry practice. For a specific formulation, refer to the batch COA and the technical agreement between the parties.

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