 |
Non-staining Antioxidant |
Behaviour in vulcanization
NAFTONOX BHT is a high-grade, non-staining and non-spotting antioxidant with a wide range of application in natural and synthetic rubbers and their latices, in numerous thermoplastics, mineral and synthetic industrial lubricants and fats, motor fuels and petrol fractions, as well as in animal and vegetable oils.
Typical fields of application
Natural and synthetic rubbers and latices
NAFTONOX BHT is a multi-purpose antioxidant for natural rubber and all synthetic
rubbers and their latices. It does not discolour non cause spots or flecks on the
protected products even after prolonged exposure to light. Neither contact staining
non corona effects were to be observed in materials containing NAFTONOX BHT in contact
with other materials.
Due to a certain volatility it is not recommended for heat strained articles.
NAFTONOX BHT offers excellent protection against the crazing effect in light coloured
vulcanizates and against the harmful effects of overvulcanization. The product is equally
energetic against the harmful effect of rubber poisons like Cu and Mn. In combination
with e.g. mercaptobenzimidazole a synergistically increased protection is achieved.
At heat-compounding in the internal mixer, NAFTONOX BHT prevents the cyclization of
synthetic rubbers.
When used in latex compounds, NAFTONOX BHT has to be added in a dispersed form which we
supply under the name NAFTONOX BHT-E 50 %.
For solid rubber compounds and latices we recommend a concentration between 0.5 - 2.0
phr NAFTONOX BHT on 100 phr rubber or rubber dry substance.
Plastics
For the use in plastics like polyethylene, polypropylene, polystyrene a.o., NAFTONOX BHT is an important processing stabilizer against degradation due to heat or oxygen influenze. It will be advantageous to use still another synergist like e.g. thioalkyl acid esters to increase the protective effect. For stabilizíng plastics we recommend a concentration of 0. 1 - 0.5 parts by weight NAFTONOX BHT on 100 parts plastic.
Motor fuels, lubricating oils and fats
NAFTONOX BHT prevents in certain petrol fractions like crack and pyrolysis petrols, aircraft motor oils a.o. the resin-like separations (gum formation). The input of NAFTONOX BHT to lubricating oils like motor oils, hydraulic oils as well as to lubricating fats is equally very important to prevent autoxidative reactions. We recommend a concentration of 0.1 - 0.5 % NAFTONOX BHT.
Food contact applications
BGA: Empf. XXI, Cat. 1
FDA: Regulated in CFR 21, § 177.2600
Shelf life
2 Years minimum in the dark when avoiding extremely high temperatures and humidity. In any case the material shouid not be stored in the light.
Standard packing
Multi-ply paper bags with PE-lining, 25 kg.
Product information
| NAFTONOX BHT | Product form: powder | |
| Product Specification | ||
| Melting point (capillary method) (°C) min. | 69 | |
| Solidifying point (°C) min. | 69 | |
| Purity (GC) (%) min. | 99.8 | |
| Ash content (%) max. | 0.01 | |
| Colour | white crystals | |
| Appearance | free of hard parts and conglomerations | |
| Typical Properties | ||
| Density, 20 °C g/cm3 | approx. 1.03 |