1. Main Application Areas

(1) Polymer Material Processing and Stabilization

Polyurethane (PU): Widely used in polyether polyols, polyurethane foams, elastomers, etc., effectively inhibiting thermal oxidative degradation during high-temperature processing or use, extending product lifespan.

Rubber Industry: Used for anti-aging of natural rubber and synthetic rubber (such as SBR, BR, NBR, etc.), preventing hardening and cracking caused by oxygen, heat, and light.

Plastics Industry: Suitable for antioxidant protection of general-purpose plastics such as polyethylene (PE), polypropylene (PP), and polystyrene (PS), as well as engineering plastics (such as ABS, POM).

Adhesives and Sealants: Provides long-term stability in polyurethane adhesives, silicone sealants, etc.

(2) Lubricating Oils and Greases
Used as an auxiliary antioxidant in industrial lubricating oils, greases, transformer oils, etc., slowing down viscosity changes or acid value increases caused by oil oxidation.

(3) Other Chemical Products
Can be used in polymer coatings such as coatings and inks to prevent yellowing or performance degradation due to oxidation.

Partially used in fuel oil to inhibit precipitate formation.

2. Characteristics
Highly effective antioxidant: Delays material aging by capturing free radicals and interrupting chain oxidation reactions.

Good compatibility: Compatible with most polymers and additives, and does not easily precipitate or migrate.

Processing stability: Provides protection during high-temperature processing (such as injection molding and extrusion), reducing yellowing and degradation.

Low toxicity: Meets the requirements of most industrial regulations and is suitable for various civilian and industrial products.

3. Precautions
Complementary use: Often used in combination with phosphorus and sulfur-based auxiliary antioxidants (such as 168 and DLTDP) to produce a synergistic effect and improve long-term stability.

Regulatory compliance: Local regulations regarding additive restrictions need to be confirmed based on the specific industry (e.g., food contact materials, medical devices).

Storage and processing: Avoid high temperature and humid environments to prevent clumping or deterioration.

4. Market Positioning

Antioxidant 4500 is an economical and practical general-purpose antioxidant that is stable under medium and high temperature conditions. It is especially suitable for polyurethane and rubber products and is a common choice in anti-aging formulations.