ANTI OXIDANTS
Antioxidants are essential stabilizing additives used to protect plastics and polymers against thermal and oxidative degradation during processing and throughout their service life. They help minimize polymer degradation, discoloration, loss of mechanical properties, and changes in melt viscosity caused by exposure to heat, oxygen, and repeated processing.
Polymer Add (Thailand) Co., Ltd. is introducing a selected range of primary and secondary antioxidants for polyolefins, engineering plastics, elastomers, and other polymer applications. In addition to conventional grades, we can develop micronised and customized powder forms with controlled particle size distributions to improve dispersion, handling, and incorporation into specific polymer systems.
Low-Melting, High-Volume Antioxidants
These general-purpose antioxidants are suitable for plastic resin producers, compounders, masterbatch manufacturers, recyclers and finished-product manufacturers. They are available in conventional powder, free-flowing or granular forms, depending on the individual product and application requirements.
| CHEMICAL NAME | CAS NO | MELTING RANGE (DEG C) | TDS | MSDS | REGULATORY |
|---|---|---|---|---|---|
| AO 168 - Tris(2,4-di-tert-butylphenyl) phosphite | 31570-04-4 | 183ā186Ā°C | |||
| AO 245 - Ethylenebis(oxyethylene) bis[3-(5-tert-butyl-4-hydroxy-m-tolyl)propionate] | 36443-68-2 | 76ā79Ā°C | |||
| AO 1010 - Pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] | 6683-19-8 | 110ā125Ā°C | |||
| AO 1076 - Octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate | 2082-79-3 | 50ā55Ā°C |
High-Melting Specialised Antioxidants
Certain antioxidants have melting or decomposition temperatures close to or above the normal processing temperature of the target polymer. Unlike lower-melting antioxidants, these products may not melt completely during compounding. Their performance can therefore depend on particle size, distribution and the quality of dispersion within the polymer.
Micronised forms provide a smaller and more controlled particle size, increased surface area and improved distribution throughout the polymer melt. This can be particularly important in fibres, nonwoven, thin films, tapes, masterbatch and other applications where coarse or incompletely dispersed particles may affect filtration, appearance or processing consistency.
| CHEMICAL NAME | CAS NO | MELTING RANGE (DEG C) | TDS | MSDS | PSA | SEM | REGULATORY | INQUIRY |
|---|---|---|---|---|---|---|---|---|
| AO 1024 - N,Nā²-Bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine | 32687-78-8 | 224ā229Ā°C | ||||||
| AO 1330/330 - 1,3,5-Trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene | 1709-70-2 | 248ā250Ā°C | ||||||
| AO 1425 - Calcium bis[monoethyl(3,5-di-tert-butyl-4-hydroxybenzyl)phosphonate] | 65140-91-2 | Above 260Ā°C | ||||||
| AO 3114 - 1,3,5-Tris(3,5-di-tert-butyl-4-hydroxybenzyl)-1,3,5-triazine-2,4,6-trione | 27676-62-6 | 218ā223Ā°C | ||||||
| AO 9228 - Bis(2,4-dicumylphenyl) pentaerythritol diphosphite | 154862-43-8 | Above 228Ā°C |
Micronised Antioxidant Solutions
Micronisation is particularly relevant when an antioxidant remains solid or only partially melts during polymer processing. Reducing the particle size can improve physical distribution, shorten the distance required for dissolution or diffusion and reduce the possibility of coarse, undispersed particles in the finished compound.
Product selection and dosage should be confirmed through processing trials and performance testing. Regulatory suitability, including food-contact requirements, must be evaluated for the specific antioxidant, polymer, concentration and intended end use.