What is Rubber Antioxidant TMQ?

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What is rubber antioxidant TMQ?

TMQ is a commonly used antioxidant in rubber that helps enhance the durability and longevity of rubber products by preventing oxidative degradation.

TMQ (2,2,4-Trimethyl-1,2-dihydroquinoline) is a widely used rubber antioxidant that prevents the oxidative degradation of rubber, which occurs when rubber products are exposed to oxygen, heat, and light. TMQ is crucial in extending the life of rubber products, including tires, seals, hoses, and other rubber goods.

Qualified Parameters of TMQ

Parameter Value
Chemical Name 2,2,4-Trimethyl-1,2-dihydroquinoline
Appearance Brown to red-brown powder
Melting Point 132°C-138°C
Purity ≥ 98%
Ash Content ≤ 0.5%
Solubility Soluble in benzene, toluene, chloroform
Specific Gravity 1.1-1.2 g/cm³

Scientists holding chemical structure drawings for rubber antioxidant TMQ```

What is TMQ in rubber?

TMQ is an antioxidant used in rubber formulations to prevent oxidative degradation. By stabilizing rubber compounds, it enhances their heat resistance, reduces cracking, and increases the longevity of the product. TMQ is used primarily in tire manufacturing, but also in other rubber products exposed to harsh environmental conditions.

Rubber tire and vulcanization process

What is the production method of rubber antioxidant TMQ?

TMQ is produced through a synthetic process that involves the reaction of aniline and isoprene in the presence of a suitable catalyst. The process typically requires careful control of temperature and pressure to achieve the desired molecular structure. The production of TMQ can be done via either batch or continuous methods, with batch methods being more common in large-scale industrial applications.

Laboratory Process

Which antioxidant is used in rubber?

Besides TMQ, other antioxidants such as IPPD (N-isopropyl-N'-phenyl-p-phenylenediamine) and 6PPD (N-phenyl-N'-cyclohexyl-p-phenylenediamine) are also used in rubber formulations. Each antioxidant has different characteristics, with TMQ being favored for its excellent heat resistance and durability, while IPPD and 6PPD are often chosen for their specific compatibility with certain rubber types.
TMQ Antioxidant Structure

What is the structure and solubility of TMQ antioxidant?

TMQ has a unique molecular structure with a quinoline backbone. It is highly soluble in organic solvents such as benzene, toluene, and chloroform but is insoluble in water. This solubility makes TMQ particularly effective in rubber compounding, allowing it to be evenly distributed within the rubber matrix.

TMQ Antioxidant Structure

What is the specific gravity of TMQ?

The specific gravity of TMQ ranges between 1.1 and 1.2 g/cm³, which is typical for solid compounds used in rubber processing. This density is important for determining the proper loading levels of TMQ in various rubber formulations.

Density of TMQ

Conclusion

TMQ is an essential antioxidant in rubber formulations, improving the heat resistance, durability, and longevity of rubber products by preventing oxidative degradation.

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