New Multifunctional Masterbatch For Use In Polyester Resins
Clariant Additive Masterbatches has introduced CESA®-extend masterbatches, a series of new multifunctional oligomeric masterbatches for use in the PET family of resins, that can aid in the retention or raising Intrinsic Viscosity (IV) of the resin during processing.
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| Key attributes of CESA®-extend are: | | Typical applications include, but not limited to: |
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| - Increased Intrinsic Viscosity | | - Extrusion of polyester sheet/strapping. |
| - Improved melt viscosity | | - Injection blow Molding of polyester bottles |
| - Increased melt strength | | - Up-grading of low IV polyester resin, for fiber & recycling applications |
| - Anti-block effects | | - Pelletizing undried recycle or scrap |
| - Low level usage | | - Foaming of PET sheet or film |
| - No need for pre-drying | | - Potential for extrusion blowmolding |
| - Good clarity | | |
| - No by-product generation | | |
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CESA®-extend masterbatches contain a multifunctional oligomeric reactant, designed to repair the damage that heat and moisture can cause to polyester resins. CESA®-extend 1597 is used where clarity is not an issue, and 1598 is for use where clarity is critical.
Optimum reactivity of CESA®-extend can be achieved with a recommended use level of between 0.5 and 2.0%, and within a process residence time of 1.5 to 2.0 minutes, depending on predrying, starting IV, end-group ratios, and target melt rheology (see chart below). It may be necessary to increase down stream process temperatures by 10-15oC when using CESA-extend at the higher use levels (> 1.0%). Typically, the feed zone temperatures used in extrusion or injection molding are reduced by 10-15oC to allow for better distribution, prior to any polymer reaction.
Additional information about technical specifications and product availability may be requested by calling (800) 891-3922 or (540) 665-1865. Fax inquiries may be sent to 540-665-2917. Customers can also work with Clariant Additive Masterbatches to develop custom formulations at its ISO 9001- Certified Winchester facility.