Antidegradants

Description: In the early days of industrial use of rubber, products made from rubber would quickly become soft and sticky. Research identified that the degradation of rubber was due to reactions with oxygen in the atmosphere.

The oxidation process causes chain scission and cross-link breakage in rubbers, leading to adverse color changes, loss of flexibility, elongation loss, reduced impact resistance, cracking, and surface deterioration in rubber products. Nowadays, certain phenols, hydroxylamine derivatives, and secondary aromatic amine derivatives are used to delay the degrading effects of oxygen.

Market Names

Age retardants, oxidation retardants

Types

• IPPD (4010): Para-phenylenediamine antidegradants function as primary antioxidants and are considered the strongest class of antioxidants. They are widely used in vehicle tires, belts, and molded and extruded rubber products. Due to their high staining properties, they are not preferred for white or colored products. They provide long-term protection to rubber blends, with increasing effectiveness as the concentration in the blend increases.
• 6PPD (4020): Belongs to the same chemical group as IPPD and has similar properties. However, it is less volatile and leaches less into water compared to IPPD, offering better performance when used in equal dosages. Additionally, it does not have the skin irritation properties of IPPD, making it a preferred alternative.

• Function: Retardant, protective
• Appearance: Dark purple, brown, or black pastilles
• Applications: Rubber production, cosmetics, paints, agriculture, ceramics, cement
• Packaging: 25 kg bags
• Storage: Store in the original packaging, in a dry, cool, and well-ventilated area. Avoid exposure to high temperatures or direct sunlight. Shelf life is 2 years from the date of manufacture.