Omnistab AN9128 is a new type of phosphite antioxidant with high molecular weight. Its appearance is free flowing white powder. AN9128 has low volatility, high phosphorus content (7.3%) and excellent heat resistance due to its large molecular weight and molecular structure.
vCompared with other types of phosphite antioxidants, Omnistab AN9128 has below advantages :
üExcellent high temperature stability and low volatility
üExcellent protection effect in polymers under harsh conditions
üIt gives the material protection against yellowing and degradation during high temperature processing
üApproved by FDA and can be applied to food contact polymer materials
Omnistab AN9128 molecular structure
vImprove the heat aging performance of materials
Material type: HDPE; Modifier components: 0.05%AN1076+0.05% phosphite antioxidant
According to above experimental data, it’s obviously that AN9128 can significantly improve the thermal aging stability of the material at high temperature. Thanks to its larger molecular weight, it has a higher melting point, higher Thermogravimetric temperature. So it could perform more stable and better migration resistance in system.
Contrast of yellowing index in long term thermal aging test
(After 850H at 130℃, the PP sheet with 0.2%AN9128 was added)
vExcellent hydrolysis resistance
Recent hydrolysis resistance tests have shown that AN9128 retains good durability and hydrolysis resistance even when exposed to condition at 85% relative humidity. AN9128 does not exhibit coking like other phosphite additives. This prevents stains from appearing on the polymer and clogging the filter in the extrusion system.
24 hours after exposure to moisture, AN9128maintains a dry flowing powder
vApplications of OMNISTAB AN9128:
²AN9128 is used in HDPE to provide excellent color and melt stability, and could get a better results at lower dosage.
²OMISTAB AN9128 is popular in LLDPE processing due to its exceptional high temperature stability, which effectively controls LLDPE’s color and melt index during multiple extrusions.
²AN9128 is suitable for PC and other engineering plastics that need to be processed at high temperature. Most phosphite additives will decompose or volatilize, so these are not suitable as processing stabilizers. But AN9128 can be used for temperature resistant polymers, such as PA (nylon), polyester and polyether, etc.
For more information of Omnistab AN9128, pls consult relevant business personnel and technical team of Deltachem, or you can visit official website www.deltachem.net . Qingdao Deltachem is committed and looking forward to your inquiry!
