SUNNYJOINT ANTIOXIDANT IPPD(4010NA)
Antioxidant Chemical Name
|Storage Life||12 months|
Light Red to Purple Granule
Melting Point ℃≥
Loss on Drying %≤
The synergistic effects of rubber anti-aging agents include intermolecular synergism and intramolecular synergism.Intramolecular synergy, also known as self-synergism, refers to the fact that an anti-aging agent contains multiple antioxidant functional groups, which have synergistic effects on each other.
1. Intermolecular synergies intermolecular synergies can be divided into the following two types :(1) all synergies refer to the synergies generated by the combination of antioxidant agents with the same antioxidant mechanism;(2) hetersynergistic effect refers to the synergistic effect between antioxidant agents with different antioxidant mechanisms.
(1) are synergy when two different space steric hindrance of hindered phenol, or two kinds of structure and activity of different amine stabilizer, or an aromatic amine and 1 kind of hindered phenolic antioxidant compound, when using highly active stabilizer can effectively capture the oxidation of free radicals or oxygen free radicals, low activity of the stabilizer can provide hydrogen atoms, that highly active stabilizer regeneration, generate synergy, to maintain the lasting antioxidant ability.
(2)the typical example of heterogeneous synergistic effect is the combination of main anti-aging agent and auxiliary anti-aging agent.There is synergistic effect between phenolic antioxidant and phosphite.Phenolic anti-aging agent as a kind of main antioxidant, there is a lively hydrogen atom (o-h) in the molecule, this hydrogen atom is more active than the hydrogen atom on the rubber carbon chain (including the hydrogen double bond on the carbon chain), the hydrogen atom first with the macromolecular chain free radical R?Or ROO?Combine to form hydroperoxides and stable phenolic oxygen radicals (ArO?)..Due to the ArO?The increase of the ortho-substitution cardinal number or its branches, namely, the increase of its spatial hindrance effect, can make it protected by the larger adjacent volume groups and improve the stability.Also, because ArO?In the same large conjugated system with benzene ring, it is relatively stable and has low activity, so it cannot initiate the chain reaction, but can only combine with another active free radical, terminate one free radical again, and generate a more stable compound, so as to terminate the chain reaction.ArO?This stability can prevent the rapid consumption of anti-aging agents due to direct oxidation, and can also reduce chain transfer reaction, thus improving its antioxidant performance.Hydroperoxides are harmful intermediates that catalyze thermal oxidation.However, phenolic antioxidant cannot decompose hydroperoxide by itself, so when phenolic antioxidant is used alone, it is difficult to achieve the ideal effect of aging prevention.Although phosphite does not have the ability to capture free radicals of peroxide, it can decompose hydroperoxide, thus inhibiting the degradation of rubber caused by autocatalytic reaction.However, the hydrolysis stability of phosphorous esters is poor, which leads to the decrease of their antioxidant stability.The hydrolytic stability of phosphite anti-aging agents is related to the steric hindrance around the phosphorus atoms in the structure.Through theoretical research and practice, it has been proved that the compound use of chain terminator and hydrogen peroxide decomposition agent can achieve complementary effects and can play a good synergistic role.Therefore, many complex anti-aging agents are composed of blocked phenol and phosphorous acid.
2. Self-synergism: with the deepening understanding of composite anti-aging agents, we have developed an intramolecular composite anti-aging agent.The combination of two or more functional groups with antioxidant properties into a single molecule provides synergies of its own.It may also improve the heat resistance, light resistance, extraction resistance and so on.In particular, the synergistic effect of the main anti-aging agent and the auxiliary anti-aging agent can be used to improve the efficiency of the anti-aging agent through intramolecular compound.