Antioxidant

Polymer and its related products such as plastics, rubber and synthetic fiber, during the process of usage and storage, due to the environmental impact, under the combined effects of heat, oxygen, water, chemical medium, light, and microorganisms, will undergo series changes in their chemical composition and structure. There will be also corresponding deterioration in the physical properties of becoming sticky, hard, brittle, and stiff, being cracked, or having color as well as losing intensity. All these changes are collectively called aging. Antioxidant refers to substance that can delay the aging process of polymer compound with most of these substances being able to inhibit oxidation, and some can inhibit the action of heat and light, thereby extending the life of the product.

There are various kinds of reasons that can lead to the aging of the polymer with various kinds of corresponding Antioxidants. General antioxidants, anti-ozone agents, radical inhibitors, inhibitors of harmful metals, UV stabilizers, preservatives, stabilizers, light stabilizers, retarders and a polymerization inhibitor can all be used as an antioxidant. Moreover, for different polymers, in different environmental conditions, the choice of antioxidant also varies. According to their chemical properties, it can be divided into the following five categories.
1. Ketone amine condensate: this kind of condensate is effective in preventing the aging caused air and ozone. For example, the cryogenic condensate of acetone and diphenylamine has good anti-aging effect on the polymer. The condensate of acetone and phenylacetate naphthylamine appears as a light brown, non-toxic powder, being able to be dissolved in acetone and dichloroethane. It is applicable to natural rubber adhesives, neoprene adhesives and nitrile adhesives.
2. Aldehyde amine condensate: condensate of aldehyde amine has moderate efficacy on the aging caused by air. It is applicable to natural rubber adhesives and synthetic rubber adhesive. With the increased usage amount, it can improve the heat resistance of the adhesive. For example, the condensate of aldehydes and naphthylamine is a non-toxic orange or dark red resinous solid.
3. The aromatic amine: the aromatic amine a kind of Antioxidants of specific efficacy with different Antioxidants having different special effects. For diene type of adhesive (natural rubber or some synthetic rubber adhesive), people mostly use phenyl-2-naphthylamine and phenyl -β-naphthylamine. Another example is the meta-toluenediamine which has moderate efficacy against aging caused by air and heating. However, it has relative high anti-aging performance in the uncured rubber adhesive.
4. Aromatic diamine: diphenylamine derivative is an excellent kind of air Antioxidant with its performance being related to the nature of the substituents.
5. Quinoline derivative: quinoline derivative is effective in anti-air, anti-ozone aging. Antiozonants are mostly the p-phenylenediamine derivatives.

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Structure Chemical Name CAS MF
N-Oleoylethanolamine N-Oleoylethanolamine 111-58-0 C20H39NO2
1,3,5-Tri-2-propenyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione 1,3,5-Tri-2-propenyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione 1025-15-6 C12H15N3O3
N-(1,3-Dimethylbutyl)-N'-phenyl-p-phenylenediamine N-(1,3-Dimethylbutyl)-N'-phenyl-p-phenylenediamine 793-24-8 C18H24N2
N-Isopropyl-N'-phenyl-1,4-phenylenediamine N-Isopropyl-N'-phenyl-1,4-phenylenediamine 101-72-4 C15H18N2
4,4'-Methylenedianiline 4,4'-Methylenedianiline 101-77-9 C13H14N2
Methyl-2-mercaptobenzimidazole Methyl-2-mercaptobenzimidazole 53988-10-6 C8H8N2S
Diisooctyl sebacate Diisooctyl sebacate 27214-90-0 C26H50O4
Dioctyldiphenylamine Dioctyldiphenylamine 101-67-7 C28H43N
4,4'-Dithiodimorpholine 4,4'-Dithiodimorpholine 103-34-4 C8H16N2O2S2
H-GLU-LYS-OH H-GLU-LYS-OH 5891-53-2 C11H21N3O5
4,4`-di(a-methylbenzyl)diphenylamine 4,4`-di(a-methylbenzyl)diphenylamine 75422-59-2 C28H27N
1,3-Bis((3-methyl-2,5-dioxopyrrol-1-yl)methyl)benzol 1,3-Bis((3-methyl-2,5-dioxopyrrol-1-yl)methyl)benzol 119462-56-5 C18H16N2O4
1,4-Benzenediamine N,N'-mixed phenyl and tolyl derivs 1,4-Benzenediamine N,N'-mixed phenyl and tolyl derivs 68953-84-4
N,N'-Bis(methylphenyl)-1,4-benzenediamine N,N'-Bis(methylphenyl)-1,4-benzenediamine 27417-40-9 C20H20N2
Sulfur powder Sulfur powder
Sodium hexamethylene-1,6-bisthiosulfate dihydrate Sodium hexamethylene-1,6-bisthiosulfate dihydrate 5719-73-3 C6H12Na2O6S4
Tetrabenzylthiuramdisulfide Tetrabenzylthiuramdisulfide 10591-85-2 C30H28N2S4
4-[(4-Morpholinylthio)thioxomethyl]-morpholine 4-[(4-Morpholinylthio)thioxomethyl]-morpholine 13752-51-7 C9H16N2O2S2
Antioxidant BLE-C Antioxidant BLE-C
N-ISOPROPYL-N-PHENYL-P-PHENYLENEDIAMINE N-ISOPROPYL-N-PHENYL-P-PHENYLENEDIAMINE C15H18N2
Antioxidant 688 Antioxidant 688 C20H28N2
RUBBER ANTIAGER KY405, MIN96% RUBBER ANTIAGER KY405, MIN96% 10881-67-1
Antioxidant 8 PPD Antioxidant 8 PPD
Antioxidant MB-A Antioxidant MB-A C14H10N4S2Zn
CAPROLACTAMDISULFIDE CAPROLACTAMDISULFIDE 23847-08-7 C6H9NOS2-2
Antioxidant SP-C Antioxidant SP-C
N,N'-Di-2-napthyl-p-phenylene-diamine N,N'-Di-2-napthyl-p-phenylene-diamine C26H20N2
Antioxidant SP-P Antioxidant SP-P
Antioxidant 2246-A Antioxidant 2246-A
Antioxidant HS-911 Antioxidant HS-911
N,N,N',N'-Tetraphenyl diaminomethane N,N,N',N'-Tetraphenyl diaminomethane C25H22N2
Antioxidant AM Antioxidant AM (C15H15N)n
Antioxidant 2088 Antioxidant 2088 C25H44OS2
OCTYLATED DIPHENYLAMINE OCTYLATED DIPHENYLAMINE C20H27N
Antioxidant BLE Antioxidant BLE C15H15N
Antioxidant 998 Antioxidant 998
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