Antioxidant products can prevent polymers from undergoing chemical reactions or degradation during processing due to heat, shear stress, or exposure to other harsh processing environments. These reactions or degradation can lead to changes in the chemical composition or molecular weight of the product. Additionally, it can result in the deterioration of mechanical properties and affect the appearance, causing changes in the color of the polymer or a reduction in glossiness.

Antioxidants are products added to polymers during processing to protect the polymer's structure and prevent discoloration.

Primary Phenol Antioxidants

Phenolic Antioxidants	Chemical structure	Type	Molecular Weight	Melting point ℃	TGA (°C, % weight loss)	Applications
Anox® 20		Powder	1178	110-125	352 5% 365 10% 415 50%	General-purpose heat stabilizer used in various organic compounds.
Anox® PP-18		Powder	531	50-55	263 5% 277 10% 325 50%	Widely used antioxidant with good stability and compatibility, can replace BHT.
Anox® 1315		liquid	485	–	232 5% 258 10% 314 50%	Low viscosity liquid antioxidant with good compatibility and solubility
Lowinox® 1790		Powder	700	159-162	202 1% 333 5% 349 10%	Excellent resistance to gas fading, high molecular weight, high extract resistance, suitable for use in fiber products.
Lowinox® 22M46		Powder	341	128-132	178 5% 180 10% 210 25%	Long-term stabilizer for synthetic rubber and latex, does not affect processing or vulcanization properties.
Lowinox® AH25		Powder	250	179	158 5% 177 10% 188 25%	Has excellent protective capabilities, preventing oxidation and cracking caused by sunlight. Recommended for use in adhesives and rubber products.
Lowinox® CA22		Powder	545	>183	278 5% 297 10% 307 25%	High-performance antioxidant, suitable for use as a stabilizer in polyolefins or soft PVC plasticizers.
Lowinox® CPL		Powder	600-700	>105	268 5% 290 10% 327 25%	Efficient, non-discoloring polymer antioxidant, highly recommended for isoprene and butadiene polymers.
Lowinox® TBM-6		Powder	358	160-164	214 5% 227 10% 267 50%	Used in HDPE and LDPE, also used as a stabilizer for polymerization and processing, suitable for food packaging materials.
Lowinox® GP45		Powder	587	76-79	297 5% 312 10% 332 50%	General hindered phenol antioxidant with good solubility and low volatility.
Naugawhite®		liquid	480	–	–	Non-staining, non-discoloring antioxidant for natural and synthetic rubber.

Metal Deactivators

Metal Deactivators	Chemical structure	Type	Molecular Weight	Melting point ℃	TGA (°C, % weight loss)	Applications
Lowinox®MD24		Powder	553	221-232	284 5% 295 10% 330 50%	Dual action of antioxidant and metal passivation, suitable for polyolefins and elastomer wire and cable applications.
Naugard® XL-1		Powder	531	170-180	343 5% 352 10% 373 50%	Reduces the interference and degradation caused by metal ions in products, suitable for most polymers.