Nitrile rubber has excellent oil resistance. Nitrile rubber products are not easy to swell in oil medium, and can maintain good performance for a long time. But nitrile rubber is very unstable under the action of ozone, especially under dynamic conditions. Proper use of antioxidants can extend the service life of nitrile rubber products. So in actual production, which antioxidants have better protective effects in nitrile rubber? How much is appropriate?
1. Improve the commonly used antioxidants for nitrile heat and oxygen aging
Amine antioxidants in nitrile rubber can significantly delay the thermal oxygen aging time of the rubber, and the ketone-amine condensate has a better effect. Commonly used amine antioxidants to improve the heat and oxygen aging performance of nitrile rubber products include antioxidant RD, antioxidant BLE and antioxidant D. The dosage is controlled at about 1.5-2 parts, and the dosage can be appropriately increased according to actual needs.
2. Commonly used antioxidants to improve the ozone aging resistance of nitrile
Anti-aging agent NBC and anti-aging agent 4010NA can significantly improve the ozone resistance of nitrile rubber products, and the dosage is generally controlled between 1-2 parts; combined with 1-2 parts of paraffin wax can further improve the ozone resistance of nitrile rubber 2LLYY1223. In actual production, manufacturers of nitrile rubber products can also combine nitrile rubber and polyvinyl chloride in a ratio of 3:1 to significantly improve the ozone aging resistance of nitrile rubber products.
3. Improve the fatigue and aging resistance of nitrile commonly used antioxidants
When using nitrile rubber or nitrile reclaimed rubber to produce rubber products, antioxidant H and antioxidant 4010 have obvious effects on improving the fatigue and aging resistance of nitrile rubber, and the dosage is controlled between 1-2 parts.
4. Commonly used antioxidants to improve the light aging resistance of nitrile
Phenolic compounds can be used to improve the light aging resistance of nitrile rubber products, such as antioxidant DBHQ, antioxidant WSP, antioxidant NBC, etc. The amount is controlled between 1-2 parts. In actual production, manufacturers of nitrile rubber products can also directly use ultraviolet absorbers, such as UV-9, and use 0.1-0.5 parts to obtain good results.
5. Improve the resistance of nitrile to radiation aging commonly used antioxidants
Some nitrile rubber products need to deal with high-energy radiation and need to use anti-high-energy radiation antioxidants. In actual production, the mixture of antioxidant H and antioxidant A, the mixture of antioxidant H and antioxidant D, and antioxidant 4010 can significantly improve the high-energy radiation resistance of nitrile rubber products. The dosage is generally controlled at 2-4 parts. between.
When using nitrile rubber, nitrile reclaimed rubber or nitrile rubber/reclaimed rubber to produce rubber products, in order to improve the aging resistance of the product, the rubber product manufacturer needs to choose a suitable antioxidant. You can use a certain antioxidant alone, or you can Combine two or more antioxidants, chemical antioxidants and physical protective agents to improve the aging resistance of rubber products and avoid blooming. Later editors have the opportunity to continue discussing with you about the application of antioxidants in nitrile rubber products.
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