Overview
Quinoline antioxidants, primarily represented by TMQ (Polymerized 2,2,4-Trimethyl-1,2-Dihydroquinoline) and RD, are high-performance heat-ageing inhibitors widely used in rubber and polymer industries. They offer excellent thermal stability and are particularly effective in applications requiring long-term resistance to heat and oxygen.
These antioxidants are non-staining (slight discoloration possible) and provide superior protection against thermo-oxidative degradation in natural rubber (NR), styrene-butadiene rubber (SBR), nitrile rubber (NBR), and butyl rubber (IIR).
Product Categories
| Product | CAS No. | Type | Key Feature |
|---|---|---|---|
| TMQ (Standard Grade) | 26780-96-1 | Polymerized quinoline | General purpose heat protection |
| TMQ (High Activity Grade) | 26780-96-1 | High molecular weight | Lower volatility, better long-term stability |
| RD (Antioxidant RD) | 26780-96-1 | Quinoline oligomer | Cost-effective, widely used in tires |
Selection Guide by Application
For Tires & Automotive Rubber
| Application | Recommended Product | Key Benefit |
|---|---|---|
| Tire sidewalls | TMQ (High Activity) | Prevents ozone cracking, heat aging |
| Tire treads | TMQ + 6PPD (combination) | Synergistic protection |
| Automotive seals & hoses | TMQ (Standard) | Heat resistance up to 120°C |
For Industrial Rubber Products
| Application | Recommended Product | Key Benefit |
|---|---|---|
| Conveyor belts | TMQ (High Activity) | Long-term heat stability |
| Rubber hoses | TMQ (Standard) | Cost-effective solution |
| Gaskets & seals | TMQ + Diphenylamine | Enhanced thermal protection |
For Wire & Cable
| Application | Recommended Product | Key Benefit |
|---|---|---|
| Insulation compounds | TMQ (Non-staining) | Low discoloration, good electrical properties |
| Sheathing compounds | TMQ (Standard) | Heat and oxidation protection |
Key Selection Factors
| Factor | Consideration |
|---|---|
| Service temperature | TMQ is effective up to 120-150°C; for higher temps, consider combined systems |
| Color requirements | TMQ may cause slight discoloration; not recommended for light-colored or transparent products |
| Regulatory compliance | Check REACH, RoHS, and food contact regulations for your region |
| Synergistic combinations | TMQ + PPD (e.g., 6PPD) for ozone + heat protection; TMQ + phenolic for wire & cable |
Product Comparison Table
| Product | CAS No. | Molecular Weight | Staining | Heat Protection | Recommended For |
|---|---|---|---|---|---|
| TMQ (Standard) | 26780-96-1 | 350-500 | Slight | Good | General industrial rubber |
| TMQ (High Activity) | 26780-96-1 | 500-800 | Slight | Excellent | High-temperature, long-term applications |
| FR (Antioxidant FR) | 26780-96-1 | 300-450 | Slight | Moderate | Cost-sensitive general use |
Recommended Starting Points
| If you need... | Recommended Product | Start with... |
|---|---|---|
| General heat protection | TMQ (Standard) | 1-3 phr in rubber compounds |
| Long-term thermal stability | TMQ (High Activity) | 1-2 phr for up to 150°C service |
| Cost-effective solution | TMQ (Standard) | 1-3 phr for industrial goods |
| Combined ozone + heat protection | TMQ + 6PPD | 1-2 phr each |
| Wire & cable application | TMQ (Non-staining) | 0.5-2 phr |
Typical Addition Levels
| Application | Recommended phr (parts per hundred rubber) |
|---|---|
| Tires (sidewalls & treads) | 1.0 – 3.0 |
| Conveyor belts | 1.0 – 2.5 |
| Automotive hoses & seals | 1.0 – 2.0 |
| Wire & cable insulation | 0.5 – 2.0 |
| General industrial rubber | 1.0 – 3.0 |
Quick CAS No. Reference
| Product | CAS No. | Synonyms |
|---|---|---|
| TMQ | 26780-96-1 | Polymerized 2,2,4-trimethyl-1,2-dihydroquinoline, Antioxidant RD |
| ETMQ | 26780-96-1 | Ethoxylated TMQ derivative |
| Antioxidant FR | 26780-96-1 | Low molecular weight TMQ |
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艳 李
