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杜邦AEM牌号发展过程


Vamac? Ethylene Acrylic Elastomer UltraUltra-Series
Recent High Viscosity AEM Polymers with Improved Processability and Properties

Makio Mori* and Klaus Kammerer DuPont Perfor

mance Elastomers
* Speaker

Presented at IRCO2010 November 18th, 2010

What is Vamac? Ethylene Acrylic Elastomer? 2 Ethylene / Acrylic Elastomer
CH2 CH2 x CH CH2 C=O OCH3 y R C=O OH Z

Heat Resistance
Superior heat resistance compared to conventional ACM, H-NBR, etc. H-

Developed and launched in 1974 by DuPont. Made in USA Elastomer having good balance of high/low temp properties and oil resistance, mainly used in automotive parts
Oil Cooler Hose

Fluid Resistance
Better oil resistance than VMQ, CR, etc. Superior resistance to EGR condensate.

Ozone Resistance
Excellent ozone resistance due to absence of double bond on the backbone. Vamac?

Low Temperature

Damping

Outstanding vibration Better low temperature properties than H-NBR, damping properties in a Hwide temperature range. FKM, etc.

Turbo Charger Hose

Seal and Gasket

Damper

DuPont Confidential

Vamac? Structure
3

Ethylene

Alkylacrylate

Cure Site Monomer

High proportion of polym. backbone
Ideal elastomer

CH2 CH2

CH C=O

CH2

R C=O OH

No DoubleDoubleBond Heat and ozone resist.

Ethylene Units Mechanical prop Low temp flex Acid resistance

O R’
Ester Structure

Carboxyl Group Form stable amide and imide crosslinks Good Heat Stability

Alkyl Group (Non-polar) Balance low temp prop and oil resistance Vamac? : R’=methyl Most polar ester

(Polar)

Oil Resistance

DuPont Confidential

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Vamac? - Standard and High Viscosity Grades
High Viscosity Grades
Low Oil Swell Vamac? GLS
18.5 MU, -24 C

Moderate Oil Swell Standard Grade
ML (1+4) 100 C, Tg

Dynamic Flex Fatigue Vamac? GXF
17.5 MU, -31 ° C

Vamac? G
16.5 MU, -30 ° C

High Viscosity Grade Vamac? Ultra IP
ML (1+4) 100 C, Tg 29 MU, -31 ° C

Vamac? VMX-3110 Vamac? VMX-3038
30 MU, -25 ° C 30 MU, -32 ° C

Major Features;

Best Compression Set, Fast Cure

Best Compression Set, Fast Cure, Low Oil swell

Best Dynamic Fatigue Resistance;

Main Applications

Low Hardness Molded parts with Molded parts, Seals best fluid and & Gaskets, High lubricant resistance pressure hoses
DuPont Confidential

High Temperature Turbo Charger Hoses

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Vamac? G

Improved Processing & Compression set Higher Viscosity

Vamac? Ultra IP
DuPont Confidential

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Vamac? G vs. Ultra IP Mixing, Rheology
Formulations
Vamac? G Vamac? Ultra IP Naugard? 445 Armeen? 18 D Vanfre? VAM Stearic Acid Spheron? SOA SO N-550 Rhenosin? W 759 DIAKTM No.1 Vulcofac? ACT 55 2 0,5 1 1,5 60 10 1,5 2 100 100 2 0,5 1 1,5 60 10 1,2 2
160 150 140 130 120 110 100 90 80 70 60 B.I.T. Comp ML (1+4, 100°C) Ts5, 121°C tc90, 180°C MH

Vamac? G Ultra IP

- Shorter Carbon Black Incorporation Time (B.I.T.) Better dispersion and shorter mixing time (one-pass mix) - Significant increase in Compound Mooney Viscosity Lower tackiness of compound sheets and feeding strips - Increased Scorch Safety (15% longer Ts5) - Higher MH (+10%), shorter tc 90 (-5%), - Combination of high MH and tc90 DuPont Confidential demolding and shorter cycle time allows for faster

O-Ring Demolding Trials
? Specially designed, self deflashing 120 cavity compression mold ? Cavities arranged in 2 sets of 60 to permit side by side demolding evaluations ? O-ring cavities with high surface area to promote demolding difficulties ? Barwell extruder to make rod pre-form ? Loading frame to position pre-form ? Air line to blow parts off mold (no physical contact)

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Test Conditions: ? Mold is cleaned thoroughly before testing ? Mold pressure = 110 bars ? Mold temperature = 190 C ? Cure time = 90 seconds ? Mold is not cleaned during test No. of O-rings sticking to the mold is counted & reported
DuPont Confidential

O-Ring Demolding Trials
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O-Ring Compression Test

No. of O-rings Sticking rings

30 25 20 15 10 5

Vamac? G

Vamac? Ultra IP

Less mold fouling
0 0 5 10 15 20 25 30

Number of Shots

Ultra IP has enhanced demolding Confidential DuPont properties compared to Vamac? G.

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Vamac? G
Improved Oil Swell

Vamac? GLS

Improved Processing & Compression Set Higher Viscosity

DuPont 3110 VMX Confidential

Vamac? GLS vs. VMX-3110 – Physical

Properties
VMX-3110 34 70 75.3 8.2 18.3 232 28.2 21.1 38.8

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100 phr Polymer, Standard Process Aid and Antioxidant level, 60 phr FEF black, 10 phr Rhenosin? W759, 2 phr Vulcofac? ACT 55, 1.75 phr DIAKTM No.1

Polymer Mooney, ML1+4@100oC Compound Mooney, ML1+4@100oC Hardness (Sh.A, 1 sec) M100% (MPa) Tensile Strength (MPa) Elongation (%) Crescent Tear Die C (N/mm) CS ISO 815, 70 hrs at 150oC VW CS PV3307, 22 hrs at 150oC

Vamac GLS 18 40 76.6 7.8 16.6 200 24.6 26.6 55.2

+10 % +16 % +15 %

Cure 5 min at 180 oC and Post-Cure 4 hrs at 175 oC

- No significant impact on Compound Hardness - Significant Improvement of Stress-Strain Properties DuPont Confidential

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Vamac? G

AEM Polymers for Applications with Highest Requirements for Flex Fatigue

Vamac? GXF
Improved Processing – High temperature Higher Viscosity Grade

VMX 3038 DuPont Confidential

Comparison of Vamac? GXF and Vamac? VMX-3038
Formulations Vamac? GXF Vamac? VMX-3038 Naugard? 445 Vanfre? VAM Stearic Acid FEF black Alcaplast? PO 80 DiakTM No.1 Vulcofac? ACT-55 Mooney viscosity ML1+4@100oC(MU) ML5up@121oC(min) MDR at 180oC ML (dNm) MH (dNm) Ts2 (min) Tc90 (min) GXF 100 2 1 1 45 2 1.1 2 46 8.9 0.45 11.1 1.0 6.8 DuPont Confidential 100 2 1 1 45 2 1 2 66 8.1 0.78 12.9 0.9 6.1 VMX-3038

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GXF Tensile at 23oC Hardness (Sh. A) M100% (MPa) TB (MPa) EB (%) Tensile at 175oC M100% (MPa) TB (MPa) EB (%)

VMX-3038

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Cure 10 min at 180oC and Post cure 4 hrs at 175 oC 67 3.3 18.0 377 3.2 4.8 135 67 3.3 20.3 421 3.7 5.5 132 24 69 14.6 374

Compression Set, 70 hrs at 150oC, ISO-815 CS (%) 26 Heat aging, 94 hrs at 200oC Hardness (Sh. A) TB (MPa) EB (%) 70 13.2 324

- VMX-3038 has better initial properties - VMX-3038 exhibits very stable modulus and hardness after aging - VMX-3038 exhibits better retension of properties

DeMattia Cut Growth at 150oC(5 Hz) aft aging 94 hrs at 200oC 15 155 Med. of 5 samples Ave. of 5 samples 23 DuPont Confidential 325

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Resistance to EGR Condensate
Pressure vessel

EGR condensate of German OEM (pH=3.0) Component Ammonium acetate Ammonium nitrate Ammonium sulfate Formic acid Propionic acid Concentration weight (mg/L) 274 35 75 1135 791
Heated Gas contact EGR vapor Liquid contact EGR condensate

Formulations Polymer Naugard? 445 Vanfre? VAM Stearic Acid Armeen? 18D FEF black Rhenosin? W759 Bisoflex? T810T DiakTM No.1 Vulcofac? ACT-55 DPG

Vamac? G Ultra IP

VMX-3110 VMX-3038 HT-ACM

2 1 1.5 0.5 60 10 1.25 1

2 1 1.5 0.5 40 10 1.2 2

2 1 1.5 0.5 40 10 1.5 2

2 1 1.5 45

1.2 1 2.5

2 1 1.5 0.5 60 5 2 0.6 1

DuPont Confidential

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Resistance to EGR condensate
Vamac? G Ultra IP VMX-3110 VMX-3038 HT-ACM

Cure 10 min at 180oC and Post cure 4 hrs at 175 oC Hardness (Sh. A) 68 58 61 TB (MPa) 15.1 17.5 17.5 EB (%) 347 407 343

64 18.6 448

63 14.6 344

Properties at 23oC aft. aging in EGR solution for 168 hrs at 90oC in liquid contact HS change (pts) 1 0 -2 -5 -8 TB change (%) 5 12 14 13 -36 EB change (%) 4 0.8 0.8 0.8 -32 Vol. change (%) 8 7 7 10 15 Properties at 23oC aft. aging in EGR solution for 168 hrs at 90oC in gas contact HS change (pts) -5 -4 -6 -6 -11 TB change (%) -7 2 -7 13 -42 EB change (%) -1 -1 -2 12 -42 Vol. change (%) 11 11 10 9 14

Vamac? exhibits superior resistance to EGR condensate when contacted with either liquid or gas compared to HT-ACM.
DuPont Confidential

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Summary
Recently introduced, high viscosity AEM Ultra polymers offer significant advantages compared to standard Vamac? grades High compound viscosity and longer Scorch times allow for better dispersion and may cut mixing cycle one-pass mix Faster Cure and cleaner molding processes Higher viscosity and faster cure allow for more compounding possibilities Better physical properties open new opportunities
Tensile, Elongation, Tear, Heat Resistance Abrasion Resistance Faster cure Shaft Seals High T, high pressure hoses

Suitable for combinations with thermoplastic parts Seals and Gaskets

Bright/Colored Compounds with better processing and properties Better retention of sealing force (CSR)

Superior acid resistance with improved processability and physical properties may give solution to latest EGR-equiped TC engine system. Blending of Ultra Grades with standard grades may be possible at various ratios for optimum price/performance ratio.
DuPont Confidential

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The information set forth herein is furnished free of charge and is based on technical data that DuPont Performance Elastomers believes to be reliable. It is intended for use by persons having technical skill, at their own discretion and risk. Handling precaution information is given with the understanding that those using it will satisfy themselves that their particular conditions of use present no health or safety hazards. Since conditions of product use and disposal are outside our control, we make no warranties, express or implied, and assume no liability in connection with any use of this information. As with any material, evaluation of any compound under end-use conditions prior to specification is essential. Nothing herein is to be taken as a license to operate or a recommendation to infringe on patents. While the information presented here is accurate at the time of publication, specifications can change. Please check www.dupontelastomers.com for the most up-to-date information. Caution: Do not use in medical applications involving permanent implantation in the human body. For other medical applications, discuss with your DuPont Performance Elastomers customer service representative and read Medical Caution Statement H-69237. Dexron? is a registered trademark of General Motors. Vamac? is a registered trademark of DuPont and is brought to market by DuPont Performance Elastomers. DuPont? and Zytel? are trademarks and registered trademarks of DuPont and its affiliates. Spheron? is a registered tradmark of Cabot Corporation. Naugard? is a registered trademark of Uniroyal. Armeen? is a registered trademark of Akzo Nobel. Vanfre? is a registered trademark of R.T. Vanderbilt. Castrol? is a registered trademark of Castrol, Ltd. Lubrizol? is a registered trademark of Lubrizol Corporation. Di-Cup? is a registered trademark of Hercules Powder Company. Dexron? is a registered trademark of General Motors. Vulcofac? is a registered trademark of Safic-Alcan. Struktol? is a registered trademark of Schill & Seilacher. Rhenogran? and Rhenosin? are registered trademarks of Rheinchemie. DIAK? is a trademark of DuPont Performance Elastomers Copyright? 2009 DuPont Performance Elastomers L.L.C. All rights reserved.

DuPont Confidential


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