Chemical Name: 57% YD-168; 28% YD-1076; 15% HP-136
CAS Number: Preparation
Applications:
ANTIOXIDANT YD2921 provides outstanding processing stability in a variety of substrates and applications. The increased effectiveness over conventional stabilizers such as IRGANOX B 921 or IRGANOX B 900 is particularly pronounced in demanding processing Polyethylenes applications.
ANTIOXIDANT YD2921 can also be used in other polymers such as engineering plastics including aliphatic polyketone, styrene homo- and copolymers, polyurethanes, elastomers, adhesives, and other organic substrates.
Features/Benefits:
The relatively high phosphite content of ANTIOXIDANT YD2921 addresses applications with demanding processing conditions in the recommended applications ANTIOXIDANT YD2921 offers superior performance and increased productivity over conventional antioxidant systems in terms of:
• Improved melt flow control
• Low initial color and outstanding color maintenance
• Superior effectiveness at high processing temperature for demanding applications
• Lower use levels leading to improved additive compatibility.
The lactone HP-136 functions as a carbon-centered radical scavenger which inhibits processing induced oxidation as soon as it starts.
YD-168 - an organophosphite of low volatility and particularly resistant to hydrolysis-protects the polymer during processing by decomposing the hydroperoxides.
YD-1076 - a hindered phenolic antioxidant - contributes synergistically to the polymer's stabilization during processing and provides long-term thermal stability by preventing thermo-oxidative degradation during service life.
Additional performance improvements can be achieved in synergistic combinations with other Ciba additives (e.g. thioethers).
The lactone HP-136 present in the blend can also be beneficial for the reduction of the monomer level in the final polymer such as styrene homo- and copolymers.
Product Forms:
Code: FF
Appearance: white, free-flowing granules
Guidelines for Use:
In the recommended applications the concentration levels for ANTIOXIDANT YD2921 range typically between 0.05% and 0.15% depending on substrate and processing conditions.
The optimum level is application specific. Extensive performance data of ANTIOXIDANT YD2921 in various organic polymers and applications are available upon request.
Physical Properties: Bulk density FF 480-570g/l
Handing & Safety:
ANTIOXIDANT YD2921 requires no special safety measures, provided the usual precautions for handing chemicals are observed. Avoid dust formation and ignition sources.
For more detailed information please refer to the material safety data sheet.
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