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EXXELOR™

Modifiers for Technical Polymers

Exxelor VA 1850 Maleic anhydride functionalized polymer Product description ExxelorTM VA1850 polymer is a low flow, amorphous ethylene copolymer functionalized with maleic anhydride produced by reactive extrusion. Its fully saturated backbone results in outstanding thermal and oxidative stability leading to enhanced weatherability. Moreover, its elastomeric nature provides high impact resistance at room and low temperature when blended with engineering polymers such as polyamide. Typical properties Property

ExxonMobil Test Method (based on)

Unit

Exxelor VA 1850

Maleic anhydride graft level FTIR EPK-04 QT-02 High (*)

Melt flow index (21.6kg/230ºC) ASTM D1238 g/10min 6.5

Density DIN 53479 g/cm³ 0.87

Glass Transition Temperature (Tg) DSC ºC 53

Volatiles AM-S350.03 % 0.15 max

Color ASTM E 313-96 Yellowness Index Pellet 50 max

*MA level is typically in the range of 0.5 to 1.0 wt% The values indicated in the table describe typical properties but do not constitute specification limits. Applications Exxelor VA 1850 is designed to: • Modify the impact characteristics of the full

range of polyamides for temperatures as low as -25°C (a unction of the modifier treat level in the blend)

• Modify the impact characteristics of other

engineering thermoplastics and technical polymers (with or without glass fibers, fillers, etc.)

• Achieve compatibility between polyolefins

and more polar polymers that are capable of interacting with maleic anhydride

Medium Mw PA6 Blends with Different Levels

of VA 1850

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Performance enhancement in polyamide:

• For blow molding application due to high molecular weight • Improved toughness performance • Easy dispersion due to backbone with Long Chain Branching (LCB)

Processing Exxelor VA1850 can be added to polyamide to achieve optimum dispersion with the polymer matrix (average particle size below 1µm) in order to obtain the best performance. This can be achieved because of the high viscosity LCB product. Compounding parameters that can lead to a optimized performance include extruder type, screw design, barrel temperature, screw speed, throughput, residence time and material sequence. Our experience technical service engineers and chemists are always on hand to help you to achieve the best performance from your processing and compounding operations.

VA1850 Rheology - Die 30/1

1.00E+01

1.00E+02

1.00E+03

1.00E+04

1.00E+01 1.00E+02 1.00E+03 1.00E+04 1.00E+05

Apparent Shear rate γ (sec-1)

App

aren

t Vis

cosi

ty η

(Pa.

s)

VA1850 @ 235°C

VA1850 @ 260°C

VA1850 @ 285°C

Storage and handling Comprehensive material safety data sheets are provided to recommend safe practices during usage. For easy handling and storage, Exxelor VA1850 is supplied as free-flowing pellets normally packed in 25kg bags (50 bags per pallet) or 1 ton supersacks. Regulatory food-contact status This product, including the product name, shall not be used or tested in any medical, healthcare or personal care application without the prior written acknowledgement of ExxonMobil Chemical as to the intended use. Please contact your ExxonMobil Chemical representative for detailed regulatory food-contact status information and/or actual compliance certification