Exact Brochure For Your Precise Needs

EXACT Plastomers HIGH PERFORMANCE SOLUTIONS FOR TPO APPLICATIONS EXACT Plastomers improve the ductility and enhance the overall performance of TPO compounds. They are tough, flexible, clear polymers that contribute these same properties to polymer blends. Whether you need toughening for automotive bumper fascias or low temperature flexibility for non-automotive applications such as sheeting, EXACT Plastomers are your solution. Our lowdensity grades have expanded our portfolio to offer improved TPO modifier performance. These products have an excellent balance of process and product properties, tailored to meet the needs of your application: • Low temperature flexibility and ductility to absorb high-energy impact without brittle failure • Excellent impact/stiffness/flow balance allowing the use of thinner, more complex parts • Excellent weatherability for many TPO applications

• Free-flowing pellet form for easy processing, storage, and handling •Production of soft, flexible TPEs via precrosslinked masterbatches for grain retention in automotive skins and heat resistance in under-the-hood applications • Recyclability consistent with polyolefin systems

ABOUT EXACT PLASTOMERS EXACT Plastomers are metallocene-catalyzed ethylene alpha olefin copolymers with densities in the range from 0.910 to 0.860 and properties in the range between linear low-density polyethylene (LLDPE) and ethylene-propylene rubber (EPR). Three families of EXACT Plastomers based on butene, hexene and octene as comonomers are offered by ExxonMobil and DEXPlastomers. Our EXACT ethylene octene grades are shown in Figure 1. The lower density grades (≤0.870g/cc) are the focus of this fact sheet. Our low-density grades have low levels of crystallinity and very low glass-transition temperatures, making them ideal for TPOs with severe low temperature requirements.

10

Melt Index (dg/min)

5371 5361

1 5062

5101

5181

5171 5061

0.1 0.860

0.870

0.880

0.890

0.900

Density (g/cc) Figure 1 Melt Index vs. Density of Ethylene Octene grades for TPO Applications

E X A C T TM P L A S T O M E R S – F O R Y O U R P R E C I S E N E E D S

TM

PEAK PERFORMANCE IN TPOS In Polypropylene Homopolymers:

In Polypropylene Impact Copolymers:

Our EXACT grades have a range of impact, stiffness, and flow performance characteristics designed to meet the needs of your application (Figure 2). Higher MI grades allow for the use of higher flow polypropylenes (PP) as base resins, which are critical for part designs with complex geometries. EXACT Plastomers afford this flexibility, while still imparting the required amount of toughening to the matrix.

Studies in model talc-filled TPO formulas show the high performance of our EXACT grades. The blend compositions used are listed below:

Compound MFR (dg/min) 1000 900 800 700 600 500 400 300 200 100 0

Multi-Axial Instrumented Impact (MAII) @ -40°C, Total Energy (J)

Notched Izod, TRoom (J/m)

0

5

10

15

20

25

30

EXACT 5062

No Break Complete Break

Composition-A: 35 MFR ICP 64 wt% Modifier 21 wt% Talc 15 wt%

Composition-B: 80 MFR ICP 64 wt% Modifier 26 wt% Talc 10 wt%

Based on Composition-A, key properties of our grades are shown in Figures 3a and 3b. High performance is achieved, as demonstrated by the high notched izod and instrumented impact values, even at higher flows. In the compound flow range defined by Composition-A, Ductile-Brittle-TransitionTemperature (DBTT) is strongly dependent on modifier density, and thus modifier crystallinity. Low DBTT translates to a more impact resistant compound, in addition to a broader application window.

EXACT 5361

EXACT 5171

EXACT 5371

EXACT 5061

Melt Flow Rate, dg/min 25

60 50

EXACT 5062

40

Brittle

1200

EXACT 5361

Ductile

30

Flex Mod, MPa

MAII @ -40°C, J (Total Energy) 45

EXACT 5061

EXACT 5171

20 700

10 EXACT 5371

0 1

6

11

16

21

Compound MFR (dg/min)

Notched Izod @ -18°C, J/m

EXACT 5061 EXACT 5062 EXACT 5361

800

Notched Izod @ 23°C, J/m

Figure 3a Key Property Profile of <0.870 g/cc density grades in 35 MFR ICP Formulation

Figure 2 Impact-Flow Balance of Exact grades in Homopolymer Polypropylenes (70:30/PP:Modifier)

Melt Flow Rate, dg/min 25

Flex Mod, MPa

MAII @ -40°C, J (Total Energy) 45

1200

160

Notched Izod @ -18°C, J/m

800

Notched Izod @ 23°C, J/m

EXACT 5181 EXACT 5171 EXACT 5371

Figure 3b Key Property Profile of ≥0.870 g/cc density grades in 35 MFR ICP Formulation

The performance of our EXACT grades was also evaluated in very high flow blends (Composition-B). Key properties are shown in Figure 4. Again, our grades expand the performance window of existing products. In a closer look at low temperature impact properties, it might be surprising that even at comparable densities, the higher melt index EXACT 5361 (3MI, 0.860 g/cc) imparts better instrumented impact and notched izod impact performance than EXACT 5062 (0.5MI, 0.860 g/cc). This is due to more favorable

matching of the polypropylene and modifier rheologies, which becomes more critical in high flow systems. This is further understood by Figure 5, which shows DBTT versus viscosity ratio p100 (viscosity of modifier/ viscosity of PP). As the ratio approaches unity, the DBTT improves. The AFM (Atomic Force Microscopy) micrographs show the more uniform dispersion of the higher flow modifier (EXACT 5361 vs. EXACT 5062) in the PP matrix, resulting in better impact properties.

Melt Flow Rate, dg/min

EXACT 5361 (0.860g/cc, 3.0MI) dn=0.58µm dw=0.74µm

40

40.0 30.0

1600

600

Notched Izod @ 0°C, J/m

EXACT 5061 EXACT 5062 EXACT 5371 EXACT 5361 EXACT 5181

700

Notched Izod @ 23°C, J/m

Density (g/cc)

20.0 10.0 0.0 dn = number average diameter dw = weight average diameter

-10.0 -20.0 3.2

5.2

7.2

9.2

11.2

13.2

15.2

EXACT 5062 (0.860g/cc, 0.5MI) dn=0.85µm dw=1.14µm

17.2

Viscosity Ratio (P100) @ 190°C

Figure 4 Key Property Profile in 80 MFR ICP Formulation

EXACT Ethylene Octene Grades

DBTT (°C)

Flex Mod, MPa

MAII @ -40°C, J (Total Energy) 45

Figure 5 Ductile-Brittle-Transition-Temperature vs. Viscosity Ratio in 80 MFR ICP Formulation

Melt Index (dg/min)

Compound MFR

1

5062

0.860

0.5

5061

0.868

0.5

5171

0.870

1

5371

0.870

5

5361

0.860

3

5181

0.882

1.1

Impact Resistance 25+

-40°C

25°C

HIGH PERFORMANCE SOLUTIONS FOR TPO APPLICATIONS ExxonMobil’s low density EXACT ethylene octene plastomers can help you achieve high performance in your TPO applications. Our broad product offering enables you to achieve the optimum balance of properties for your application. Choose EXACT Plastomers – for your precise needs.

Worldwide Sales Offices Americas ExxonMobil Chemical Company 13501 Katy Freeway Houston, Texas 77079-1398, USA Tel. 281.584.7614 Fax 281.588.2577 Europe ExxonMobil Chemical Hermeslaan 2 B-1831 Machelen, Belgium Tel. 32.02.722.4363 Fax 32.02.722.4369

E X A C T TM P L A S T O M E R S – F O R Y O U R P R E C I S E N E E D S

Asia Pacific ExxonMobil Chemical 1 HarbourFront Place #06-00 HarbourFront Tower One Singapore 098633 Tel. 65.6885.8477 Fax 65.6885.8488

©2005 Exxon Mobil Corporation. The user may forward, distribute, and/or photocopy this copyrighted document only if unaltered and complete, including all of its headers, footers, disclaimers, and other information. You may not copy this document to a Web site. ExxonMobil does not guarantee the typical (or other) values. Analysis may be performed on representative samples and not the actual product shipped. The information in this document relates only to the named product or materials when not in combination with any other product or materials. We based the information on data believed to be reliable on the date compiled, but we do not represent, warrant, or otherwise guarantee, expressly or impliedly, the merchantability, fitness for a particular purpose, suitability, accuracy, reliability, or completeness of this information or the products, materials, or processes described. The user is solely responsible for all determinations regarding any use of material or product and any process in its territories of interest. We expressly disclaim liability for any loss, damage, or injury directly or indirectly suffered or incurred as a result of or related to anyone using or relying on any of the information in this document. There is no warranty against patent infringement, nor any endorsement of any product or process, and we expressly disclaim any contrary implication. The terms, “we,” “our,” “ExxonMobil Chemical,” or “ExxonMobil” are used for convenience, and may include any one or more of ExxonMobil Chemical Company, Exxon Mobil Corporation, or any affiliates they directly or indirectly steward. ExxonMobil, the ExxonMobil Emblem, the “Interlocking X” Device, and Exact are trademarks of Exxon Mobil Corporation. Photos used on this application sheet may be representative of potential product applications only.

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Products with densities ≥0.880 may not be available in all regions.

Printed in the USA • May 2005 • 119-0405-100 • 2,000

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