For Specialty Plastics | OMNISTAB AN9128: Long-Lasting High-Temperature Resistance Antioxidant

In recent years, the demand for high-temperature resistance polymer additives has significantly increased, particularly in fields such as aerospace, automotive and electronics, where the need for high-temperature and aging-resistant specialty engineering plastics has grown substantially.

To optimize material performance, it is essential to select the appropriate additives that help polymers fully demonstrate their superior properties. Choosing the right high-temperature additives contributes to the development of high-value plastics with enhanced durability and plays a critical role in improving the performance of high-temperature resistant polymers.

Omnistab® AN9128 is a newly introduced high molecular weight hetero-spiro  phosphite ester antioxidant. The product is a free-flowing white powder with low volatility and a high phosphorus content (7.3%). Thanks to its large molecular size and structure, it exhibits excellent heat resistance.

1. Advantages of Omnistab® AN9128 Compared to Other Phosphite Ester Antioxidants:

· Excellent high-temperature stability and low volatility under high temperatures

· Outstanding stability in polymers under harsh conditions

· Exceptional anti-yellowing and high-temperature degradation protection during processing

· FDA-compliant for use in food-contact polymer materials

Molecular structure for Omnistab® AN9128

2. Enhanced Long-Term Heat Aging Performance with Omnistab® AN9128

Material type: HDPE

Modifier composition: 0.05% AN1076 + 0.05% phosphite ester auxiliary antioxidant

The comparative test data clearly show that under high-temperature conditions, Omnistab® AN9128 significantly improves the heat aging stability of materials. This is due to its higher molecular weight, which gives it a higher melting point and a higher thermal decomposition temperature, leading to more stable performance and better migration resistance.

3. Excellent Hydrolysis Resistance of Omnistab® AN9128

Latest hydrolysis resistance tests show that even when exposed to 85% relative humidity in a damp environment, Omnistab® AN9128 maintains excellent durability and hydrolysis resistance. Unlike other phosphite ester products, Omnistab® AN9128 does not cause coking, which can cause staining during polymer processing and clogging of extruder screen filters.

4. Main Applications of Omnistab® AN9128

In HDPE, Omnistab® AN9128 provides exceptional color and melt stability at low dosages, providing excellent protection.

Significantly enhances the high-temperature stability of polymers. For example, LLDPE with Omnistab® AN9128 effectively controls product color and melt index during multiple extrusion cycles.

Suitable for PC, PA, and other engineering plastics that require high-temperature processing. Unlike most phosphite ester products, which decompose or volatilize and are unsuitable for use as processing stabilizers, Omnistab® AN9128 maintains color and torque stability.

Due to its excellent hydrolysis resistance, it can also be used in biodegradable plastics such as PLA and PGA.

For more information on the usage and product details of Omnistab® AN9128, please consult our business and technical team or visit our website at www.deltachem.cn. Deltachem (Qingdao) Co. Ltd. looks forward to your inquiry!