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New Vamac ® Ultra

DuPont Performance Polymers ConferenceDuPont Performance Polymers Conference

May 20May 20th,th, 20102010

AlbergoAlbergo CoccaCocca HotelHotel

SarnicoSarnico ((BgBg))

Patrick Patrick PagliaPaglia

High Viscosity AEM Polymers With Extended Application Possibilities

22

Agenda

1. Vamac® product line

2. Vamac® Ultra IP & VMX-3110

• Properties & processing characteristics

3. Vamac® Ultra LT

33

Why Vamac Ultra IP ?

• Address the Market of Low Hardness Moulded Parts (50 – 60 Shore A) Requiring Compounds Made from Acrylic Rubbers With a Renewed Product Line that Delivers :

- High mechanical properties- Excellent abrasion resistance- Good to excellent low temperature properties- Good compression set- Good long term sealing performance (CSR)- Excellent chemical resistance to new automotive fluids (EGR, BbG)- Improved dry heat resistance

• While Erasing The Original Limited Processing Mould ingPerformances As Known As :

- Mould stickiness- Mould fouling- Low hot tear resistance- Blisters

44

Vamac® Product Line and Developments

Lower oil swell

Best Low T properties

Better properties,faster cure

Higher viscosity

Best Dynamic Flex

Fatigue (Turbo Hoses)

Peroxide Cure

Limited Post-Cure

Vamac® DP

Vamac® D, DLS

Vamac® G Vamac® GLS

Vamac® GXF

Vamac® HVG

VMX-3038 (developmental)

Vamac® Ultra LT (VMX-4017)

Vamac® Ultra IP (VMX-3040)

VMX-3110 (experimental)

Best Processing and Compression Set

Properties

High ViscosityGrades

VMX-3121(low swell version,

experimental)

55

Vamac® VMX-312131-33 MU, -26 °C

High MA version of VMX-3038

High Viscosity Grades

Best Compression Set, Fast Cure, Low

Oil swell

Molded parts with best fluid and

lubricant resistance

Best Dynamic Fatigue Resistance;

High Temperature Turbo Charger

Hoses

Best Compression Set, Fast Cure

Low HardnessMolded parts, Seals

& Gaskets, High pressure hoses

Major Features;

Main Application(s)

Vamac® VMX-3110

30 MU, -25 °C

Vamac® VMX-3038

30 MU, -32 °C

Vamac® Ultra IP

29 MU, -31 °C

High Viscosity GradeML (1+4) 100°C, Tg

Vamac® GLS

18.5 MU, -24 °C

Vamac® GXF17.5 MU, -31 °C

Vamac® G

16.5 MU, -30 °CStandard GradeML (1+4) 100°C, Tg

Very low Tg

Boots with -40°C resistance in

bench test

Vamac® VMX-4017

12 MU, -42 °C

66

Formulations

22Vulcofac® ACT 55

1.21.5DIAKTM No.1

1010Rhenosin® W 759

6060Spheron® SOA SO N-550

1.51.5Stearic Acid

11Vanfre® VAM

0,50,5Armeen® 18 D

22Naugard® 445

100Vamac® Ultra IP

100Vamac® G

- Shorter Carbon Black Incorporation Time (B.I.T.) �� better dispersion and shorter mixingtime (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 allows for faster demold ing and shorter cycle time

Vamac® G vs. Ultra IP Mixing, Rheology

60

70

80

90

100

110

120

130

140

150

160

B.I.T. Comp ML(1+4, 100 °C)

Ts5, 121°C

tc90, 180°C

MH

Vamac® GUltra IP

77

Vamac GUltra IPUltra IP / low Diak No. 1

Variations of M100, Tensile, Elongation

-60

-40

-20

0

20

40

175 °C504 Hr

190 °C168 Hr

%

Heat Ageing Vamac® G vs. Ultra IP

Variation of Shore A

-4

-2

0

2

4

6

175 °C / 504 Hr 190 °C / 168 Hr

Pts

175 °C504 Hr

190 °C168 Hr

175 °C504 Hr

190 °C168 Hr

- Better property retention for Vamac®Ultra IP

- Little to no Hardness and ModulusChange

- Compounds with tighter crosslinkdensity maintain properties better

M100

Tensile Elongation

Compounds without plasticizer

88

Comp Set vs Post Cure Time

Comp Set vs post cure time

0

10

20

30

40

50

60

70

80

90

100

0 50 100 150 200 250Total post cure time, min

Com

p S

et -

-1

wk

at 1

50C

Vamac G control with DOTG and plast

Vamac G control with ACT 55

Vamac G control with DOTG

Vamac Ultra IP and ACT 55

Vamac Ultra IP and ACT 55 and flex cure

Samples press cured for five minutes at 175°C

99

Vamac® Ultra grades offer significant improvement for part producers and end users

Comparison Vamac® G – Vamac® Ultra IP

0

20

40

60

80

100

120

140

160Mixing Time

Shear Stress (IM)

Mould Fouling

Hot Tear

Physicals at 23°CPhysicals at 150°C

CSR

Oil Ageing

Abrasion

Vamac® GVamac® Ultra IP

1010

3418Polymer Mooney ML (1+4) @ 100 °C

7040Compound ML (1+4) @ 100 °C

Original Properties at 150°C

+6 %8277Elongation (%)

+15 %28.224.6Crescent Tear Die C, Fmax (N/mm)

+27%5.74.5Tear Die C (N/mm)

+11 %5.24.7Tensile Strength (MPa)

+16 %232200Elongation (%)

+10 %18.316.6Tensile Strength (MPa)

8.27.8M 100% (MPa)

7577Hardness (Sh. A, 1 sec.), 6 mm plied

ChangeCure 5 min. at 180 °C & Post-Cure 4 h @ 175°COriginal properties @ 23 °C

VMX-3110Vamac® GLS

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

Vamac® GLS vs. VMX-3110 – Physical Properties

100 phr Polymer, standard Process Aid and Antioxidan t level, 60 phr FEF black, 10 phr Rhenosin® W759, 2 phr Vulcofac ® ACT 55, 1.75 phr DIAK TM No.1

1111

24.630.128.2Tear Strength Die C (N/mm)

200279232Elongation (%)

16.618.018.3Tensile Strength (MPa)

777475Hardness (Sh. A, 1 sec.), 6 mm plied

Cure 5 min. at 180 °C, Post-Cure 4 h @ 175°C

6.75.66.9tc90 (min)

MDR 180 °C / 0.5deg / 12 min

Vamac® GLS1.751.251.75DIAKTM No.1

Reduction of Curative Level

VMX-3110

100 phr VMX-3110, standard process aid level, 60 phr F EF black, 10 phr W759, 2 phr ACT 55

- Higher Crosslink density, shorter cure time- Hardness reduction �� addition of Carbon Black Possible ��

Savings- Tensile Strength Improvement ~ 10%- Elongation Improvement ~40%- Tear Strength Improvement ~ 20%

1212

-Similar CSet resistance at ~30% Curative reduction �� Compound cost reduction

-Vamac® Ultra IP and VMX-3038: ~20% Curative reduction p ossible

0

10

20

30

40

50

60

Vamac® GLS, 1.75 phrDIAK 1

VMX-3110, 1.75 phrDIAK 1

VMX-3110, 1.25 phrDIAK 1

CS

etin

%

Cset, ISO 815 (6mm plied), 70h@150°C

VW PV3307, 22h@150°C

Cset Daimler (VDA67521B), 22h@150°C

Vamac® GLS vs. VMX-3110 - Compression Set

1313

-Strain-Stress properties and Tear Strength at 150°C sig nificantly improved

� Advantages in Processing (Demoulding)�� Better stability of finished parts in the application its elf

Variation of Curative Level

Physical Properties measured at 150°C

0

20

40

60

80

100

120

140

Tensile Elongation Tear Die C

Vamac® GLS

VMX-3110, 1.75 DIAK No.1

VMX-3110, 1.25 DIAK No.1

%

1414

- No major impact on propertiesafter 1 week at 175 °C

- Elongation above 100 % after aging at 175 °C

- VMX-3110 maintains higherlevel of absolute values- Elongation st Variation of Elongation

-70

-50

-30

-10

0

10

%

Vamac GLS

VMX-3110

0

50

100

150

200

250

300

%

168 Hr 504 Hr Lubrizol168 Hr

IRM-90370 Hr

Dexron VI168 Hr

Dexron V1008 Hr

Dry heat 175 °C Oil resistance 150 °C


IRM-90370 Hr

Dexron VI168 Hr

Dexron V1008 Hr


Vamac® GLS vs. VMX-3110 – Aging of Elongation at Brea k

Elongation at break

Initial

1515

- Slightly higher absolute values than GLS

- No major differences in retention of properties

0

5

10

15

20

25

MPa


IRM-90370 Hr

Dexron VI168 Hr

Dexron V1008 Hr


Vamac GLS

VMX-3110

Variation of Tensile

-30

-20

-10

0

10

20

%

Dry heat 175 °C Oil resistance 150 °C168 Hr 504 Hr Lubrizol

168 HrIRM-903

70 HrDexron VI

168 HrDexron V1008 Hr

Vamac® GLS vs. VMX-3110 – Aging of Tensile Strength

Tensile Strength

1616

- Slightly higher volume change for VMX-3110 (can beimproved as VMX-3110 allows higher plasticiser levels)

Volume swell, engine oil, 150 °C

0

5

10

15

20

25

30

35

Lubrizol168 Hr

IRM-90370 Hr

Dexron VI168 Hr

Dexron VI1008 Hr

%

Vamac® GLS vs. VMX-3110 – Volume Swell

Vamac GLS

VMX-3110

1717

Hardness maintained by increasing Carbon Black100 phr VMX-3110, standard process aid level, 1.75 p hr DIAK TM No.1, 2 phr ACT 55

26.325.822.3Tear Die C (N/mm)

0.56.111.6Volume Change after 504 h @ 160 in Lubrizol OS204306 (%)

4.53.6-1.0Hardness Change (pts) after heat ageing 168h @ 175°C

282015Compression set ISO 815 (6mm plied pips), 70h @ 150 °C

262269273Elongation (%)

15.818.121.1Tensile Strength (MPa)

5.96.17.8M 100% (MPa)717070Hardness (Sh. A, 1 sec.), 6 mm plied

Cure 5 min. at 180 °C & PC 4h @ 175 °C

6.96.87.4tc90 (min)

MDR 180 °C / 0.5deg / 12 min

485887Mooney ML (1+4) @ 100 °C on compound

20100Rhenosin® W 759615143Spheron® SOA SO N-550

VMX-3110 - Variation of Plasticizer level

1818

Vamac® Ultra grades offer significant improvement for part producers and end users

Comparison Vamac® GLS vs. VMX-3110

Comparison of identical formulations Formulation Adjusted to Cure Site Level

020406080

100120140160

180Polymer Mooney

Scorch Time

MH

tc90

Mould Fouling

Hot Tear

Elongation

Physicalsat 150°C

Cset

Oil Ageing

Vamac® GLSVamac® VMX-3110

020406080

100120140160

180Polymer Mooney

Scorch Time

MH

tc90

Mould Fouling

Hot Tear

Elongation

Physicalsat 150°C

Cset

Oil Ageing

1919

Vamac® Ultra IP vs. ACM

-4

49

142

-26

0.2

-2

23

177

-39

10.3

CASTROL SLX III, AGING 504h at 160°C

Hardness Change (pts)

M50% change (%)

Eb (%)

Eb change (%)

Volume change (%)

79

2.5

8.1

191

13.9

16

19.4

286

78

3

17.6

290

26.7

19

43.6

133

ORIGINAL PROPERTIES

Hardness (Shore A)

M50%

Tb (MPa)

Eb%

Delft Tear, Fmax (N/mm)

CS (168h @ 150C), 12mm buttons

Resilience (ISO 4662)

Sandpaper Abrasion (mm^3)

12

59

-17

9

43

-32

HEAT AGING, 168h at 190°C

Hardness Change (pts)

M50% change (%)

Eb change (%)

HT-ACMUltra IP

After ageing :Better hardness and modulus retention than ‘HT ACM’.

Original properties :Vamac® Ultra IP shows significant higher Elongation (+54%), Tear resistance (+48%) and Abrasion resistance vs. ‘HT-ACM’ at similar CSet.Ultra IP with best Abrasion Resistance of all AEM grades.

2Vulcofac® ACT 55

0.61.2DIAKTM No.1

2Ekaland® DOTG/C

1010Rhenosin® W 759

8565Spheron® SO N550

11Vanfre® VAM

1.51.5Stearic acid

0.50.5Armeen® 18D

22Naugard® 445

100HT-ACM No. 12

100Vamac® Ultra IP

2020

Ranking: Vamac® Ultra IP>Vamac® G>> HT ACM

CSR in Transmission Fluid Dexron VI

Acc. To ISO 3384

Shawbury Wallace Test Equipment

Cylindrical Specimen, 6 mm high, 13 mm diameter

OIL AGING (Dexron® VI / 150°C)

0

20

40

60

80

100

0 100 200 300 400 500 600 700 800 900

Time (h)

For

ce R

eten

tion

(%)

Vamac® G (78 Shore A)

Ultra IP (79 Shore A)Ultra IP (61 Shore A)HT-ACM (79 Shore A)

2121


HT ACM 100 100Vamac Ultra IP 100 100Vamac VMX 3110 100 100

Spheron SO A N 550 75 55Regal SRF N 772 75 50 50 30MT Thermax Floform N 990 30 20 20 20Nycoflex ADB 30 20 20 20

Rubber chem Diak no 1 0.6 1.3 0.6 1.3 1.3 1.3Vulcofac ACT 55 1 3 1 3 3 3

ML 1+4 at 100°C 74 39 50 27 28 57

MDR cure rate 15 minutes at 180°C, arc 0.5°ML [dNm] 2.78 0.59 1.77 0.28 0.29 0.55T90 [min] 7.7 6.4 7.8 6.1 6.2 5.5

Compression moulding 10 minutes at 180°C, post cure 4 hr at 175 °C

Hardness Shore A (1 second) 73 75 61 60 61 63

HT ACMHT ACM VMX 3110Ultra IP Ultra IP

TS [MPa] 10.1 15.0 10.4 16.0 16.0 18.5EB [%] 184 246 235 363 346 356M100 [MPa] 6.1 5.6 4.0 2.7 2.9 3.2

2 phr Naugard 445, 1 phr stearic acid, 0.5 phr Armeen 18 D, 1 phr Vanfre Vam

Tear Strength [kN/m] 20.5 27.4 16.6 24.1 22.6 16.7

2222



70 – 75 Shore A 60 – 65 Shore A

Compression set VW, 5 seconds readingVW PV 3307:2004-08, 50 % compression on 2 mm disks

22 hr / 150 °C - [%] 71 62 46 52 43 3894 hr / 23 °C - [%] 28 31 16 29 27 26

Compression set at 150°C - Type A 12 mm molded pips70 hr- [%] 15 19 12 16 15 12168 hr- [%] 21 23 17 20 20 14504 hr- [%] 32 32 26 28 28 231008 hr - [%] 29 37 27 34 34 30

Compression set 168 hours at 150°C in Castrol SLX L ong life IV, 0W30 - 12 mm molded pipsCompression set [%] 24 31 19 28 27 16

Compression Stress Relaxation (CSR) - ISO 3384 metho d B Hot air @ 150 C - Type B, 6 mm thickness molded pips , 25% compressionForce retention (t-168 hours) [%] 18 38 37 49 49 61Force retention (t-504 hours) [%] 0 18 18 29 32 48

(No plasticizer)


2323



70 – 75 Shore A 60 – 65 Shore A

Fluid ageing 168 hours at 150°C in IRM 903

Hardness Shore A (1 second) 59 57 50 47 57 53

Tensile Strength [MPa] 9.0 13.0 8.7 11.1 14.4 14.8Elongation at break [%] 156 197 179 240 300 243

Volume change [%] 28 40 31 47 20 34

Fluid ageing 168 hours at 150°C in Castrol SLX LL04 0W 30

Hardness Shore A (1 second) 74 79 60 63 71 61Tensile Strength [MPa] 10.2 14.4 9.3 15.2 15.1 16.2

Elongation at break [%] 152 202 190 328 309 301

Volume change [%] 3 -1 3 -1 -7 5

(No plasticizer)


2424

O-Ring Compression Test

0

5

10

15

20

25

30

35

0 5 10 15 20 25 30 35

Number of Shots

No.

of O

-rin

gs S

ticki

ng

Vamac® G

Vamac® Ultra IP

Less mold fouling

O-Ring Demolding Trials

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 & r eported

2525

REP MI 36 injection press (70 tons )vertical rubber injection press with an injection head “unit V “ (shared in 2 parts: extruder screw + injection chamber)

Mold design : “Spider mold” with 6 disk shaped cavities:diameter: 30 mm (All)thickness: 6 mm (2 disks)2 mm (4 disks)

Injection Molding Trial Processing Trials

2626

60-7075-8570-80Cure time @ 180°C

(seconds)

50-55

(abt. 15% reduction)

60-6560-65Cure time @ 190°C

(seconds)

Vamac® Ultra IP

with 1.2 phr Diak® 1

Vamac® Ultra IP


Vamac® G


Compound #

Cure time was determined as minimum time to obtain blister-free vulcanisate & no deformation of parts demoulded

Injection Molding Trial Processing Trials

2727

Injection Molding Trial Processing TrialsCOMPOUNDS - 100 phr Vamac Ultra IP, 10 phr Rhenosin W 759 , 2 phr Naugard 445, 1.5 phr Vanfre Vam, 1.5 phr Stearic acid

AEM 610 AEM 612 AEM 613

Crodamide ER powder 1 1 1 1

Ultrasil VN 3 20 20Mistrobond R10C 50 50 50Calofort U

50Spheron SO A N550Dynasylan AMEO 0.5 0.5 0.5 0.5

Diak No 1Vulcofac ACT 55 2Luvomaxx safecure CACromophtal red BT 1.5Ferroxide 214 M 1.5

3 3 3 3

Compound ML (1+ 4) @ 100 °C 38 48 51 39 39

MDR - 180 °C, 0.5 °arcMH - ML - dNm 12.9 14.6 12.5 13.6 13.1ts2 - min 0.7 0.6 0.6 0.6 0.7t50 - min 2.1 1.8 1.9 2.1 2.1t90 -min 6.4 5.4 6.2 6.4 6.6

AEM 739 AEM 740

20 20

50

1.5 1.5 1.2 1.5 1.5

2828

Injection Molding Trial Processing TrialsCOMPOUNDS - 100 phr Vamac Ultra IP, 10 phr Rhenosin W 759 , 2 phr Naugard 445, 1.5 phr Vanfre Vam, 1.5 phr Stearic acid

AEM 610 AEM 612 AEM 613

Ultrasil VN 3 20 20 20Mistrobond R10C 50 50 50Calofort U

50Spheron SO A N550Dynasylan AMEO 0.5 0.5 0.5 0.5

Cure 5 min. at 180 °C, Post-Cure 4 h @ 175°CHardness, Shore A (1 sec.) 65 58 65 65 65M 100% (MPa) 5.9 2.7 4.2 5.4 5.6Tensile Strength (MPa) 15.2 12.5 19.2 13.2 13.6Elongation (%) 312 312 343 390 327

AEM 739 AEM 740

20 20

50

Compression set 70 hr / 150 °C - plied discs% 24 22 26 27 26

Compression set 24 hr / 150 °C – post cured injection moulded o-ring (94.62 mm x 5.33 mm)% 15 NA 21 14 13

Compression set VW PV-3307 22 hr / 150 °C5 seconds 56 43 63 NA NA30 minutes 41 27 40 NA NA

2929

Injection Molding Trial Processing TrialsInjection moulding parameters & results

Maplan 300 tons - barrel temperature 85 °C - mould tem perature 190 °CMould : Cr plated, diaphragm (31 cm -3) mould & o-rings (24 cm -1& 18 cm -3)

Injection time –sec (diaphragm) 3.6 3.4 3.7Cure time - sec 50 45 50

Total cycle time - sec 75 70 75

Demoulding (30 shots) automaticmanual & hot tear issues automatic

Mould fouling none sticking none

Main set of mouldings

(t90 –min) (6.4) (5.4) (6.2)

Good injectabilityGood demouldingLow fouling tendency

AEM 610 AEM 612 AEM 613

3.5 3.550/55 50/55

80 80

auto /manual automatic

slightly slightly

(6.4) (6.6)

AEM 612 AEM 613

Flow lines yes none none none none

3030

Moulding Vamac – General

• Introduction of high Mooney Vamac grades allowed to overcome processing limitations of low Mooney Vamac G & Vamac GLS (mould fouling, mould release, blisters, etc.)

• The standard recommendations for moulding Vamac compounds are still valid for the high Mooney :

• Typical shrinkage values for Vamac® Compounds

• 2.5% after press cure

• 3.5 - 4% after post cure

• Shrinkage can be reduced by

• Increasing filler

• Decreasing plasticizer

• Reducing mold temperatures

• Reducing time and temperature of post cure

3131

Moulding Vamac – General

• Mould finishes : hardened steel (P-20), Chromium plated, stainless steel

• For technical parts, ‘sophisticated’ finishes were shown to provide superior release performance, e.g Vickersil

• Balance of the end use properties & processing performances dictate the temperature settings

• Optimised compounds deliver superior overall properties

• Injection Molding Vamac ® guide available

3232

Vamac Ultra® LT

3333

• Polychloroprene (CR) has been material of choice for many years.

• CR has good oil resistance, good dynamic properties, good overall

physicals and passes functional bench tests at –40°C.

• Heat resistance of CR is not sufficient for applications close to hotter

engine parts. Temperature increase is a continued trend in automotive

applications.

-> Need for new polymer(s)

3434

• Vamac® G has been used for many years in CVJ Boots that require superior

temperature resistance compared to CR

• Glass Transition Temperature (Tg) of polymer AEM G is -30°C. To pass low

temperature bench test at –40°C, a compound Tg of - 50°C is required.

• Lowering Tg by addition of plasticizer has limits in terms of

•Heat Stability

•Processability (low Mooney Viscosity)

•Dynamic Resistance

• � Vamac® Ultra LT

3535

Vamac® Ultra LT – Improving Physical Propertiesand Flex Fatigue

Vamac® G cpd 100Vamac® Ultra LT cpd 100

Cure : 10 min @ 180 °C + Post-cure : 4 h @ 175 °C

Hardness (Sh.A, 1 sec) 68 64M100% (MPa) 3.4 3.0Tensile Strength (MPa) 13.0 10.7Elongation (%)

365 335Crescent Tear Die C ISO 34, Fmax (Nmm) 28.3 23

Tg by D.S.C ( °C) - 40 - 53

DeMattia Dynamic Fatigue @ 150 °C, ASTM D410 (frequency =5 Hz)Cycles to reach a total failure (median of 6 sample s) 495 655

3636

Vamac® Ultra LT – Low-Temperature Properties

-30

-26

-33

-24

-46

-36

-54 -55

-42

-39

-47

-43

-55

-50

-45

-40

-35

-30

-25

-20

Tg by D.S.C TR-10 Brittleness point Gehman M10

Tem

pera

ture

(°C

)

Vamac® G, w/o plast

Vamac® Ultra LT, w/o plasticizer

Vamac® Ultra LT, 17.5 phr plasticizer

3737

Vamac® Ultra LT – Low-Temperature Compression Set

ISO 815, 6 mm molded pips

44

85

95

47

73

8288

78

99 99 100

76

0

20

40

60

80

100

C.S 22 h @ -20°CC.S 22 h @ -30°C

C.S 22 h @ -35°C

C.S 22 h @ -40°C

Com

pres

sion

set

(%

)

Vamac® G, w/o plast

Vamac® Ultra LT, w/o plasticizer

Vamac® Ultra LT, 17.5 phr plasticizer

3838

ISO 37 T2 specimens used

Vamac® Ultra LT – Low-Temperature Modulus

18.2

32.4

21.4

6.8

2.11.8

2.95.3

18.9

2.3

3.9

2.1

0

5

10

15

20

25

30

35

-40 -30 -20 -10 0 10 20 30Temperature (°C)

M50

% (

Mpa

)

Vamac® Ultra LT, w/oplastVamac® Ultra LT, 10 phrplastVamac® G , w/o plast

3939

Tg after Heat Aging at 150 °C (compounds without pla sticizer)

-50

-45

-40

-35

-30

-25

-20

-13

-10

-5

0

G/Ultra LT : 100/0 75/25 50/50 25/75 0/100

Original( No Plasticizer )

1 Week @ 150 C

3 Weeks @ 150 C

6 Weeks @ 150 C

4040

Best low-temperature properties of all polymers for LT-Vamac® Ultra LT

Comparison to other low Temp polymers –Original properties

Cure 10 min. at 180 °CPostcure 4h / 175 °C

Original properties @ 23 °C

Vamac® G Vamac®Ultra LT,

plasticised

Vamac®Ultra LT

LT ACM LT HNBR

Hardness (Sh. A, 1 sec.) 68 66 65 59 70M 100% (MPa) 4.4 3.3 3.5 4.7 5.0

Tensile Strength (MPa) 16.7 10.5 12.9 10.7 20.3Elongation % 393 328 345 194 372Trouser Tear ISO-34 (N/mm) 12.4 5.9 6.2 3.6 8.4

Compression set 70h @ 50 °C, 6mm plied

22 31 26 20 50

Tg by DSC (°C) -29.5 -52.7 -43 -41 -35.7

4141

- HNBR does not meet 3 weeks heat ageing requirement s at 150°C- LT Vamac® Ultra LT provides excellent heat stabilit y

Aging 504 h @ 150 °C


plasticised

Vamac®Ultra LT

LT ACM LT HNBR

Hardness (Sh. A, 1 sec.), 6 mm plied 72 72 66 65 87Hardness Change (pts) 4 7 2 6 17M 100% (MPa) 4.6 3.7 3.3 4.0 17.1M 100% Change (%) 4 15 -5 -15 239

Tensile Strength (MPa) 15.1 9.1 11.6 8.8 21.3Tensile Strength Change (%) -9 -13 -10 -18 5Elongation % 376 329 378 204 147Elongation Change (%) -4 0 10 5 -60Trouser Tear ISO-34 (N/mm) 11.4 8.9 9.2 3.1 3.4Trouser Tear ISO-34 Change (%) -8 51 47 -14 -60

Comparison to other low Temp polymers –Heat aging 3 weeks at 150 °C

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LT ACM fails in dynamic fatigue tests


plasticised

Vamac®Ultra LT

LT ACM LT HNBR

DeMattia Crack Growth at 23 °C (frequency = 2.5 Hz)cycles to 4.5 mm Cut length 1100 720 625 27 62cycles to 8.5 mm Cut length 9200 2900 3100 110 6300cycles to 12.5 mm Cut length 30000 6800 7200 280 24000

DeMattia at 150 °C (frequency = 5 Hz)Average of 6 samples 298 2045 298 20 232Median of 6 samples 325 1925 325 5 245

Low temp polymers – Dynamic flex resistance

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� Vamac® Ultra IP & MX-3110 provide higher Viscosity c ompared to Vamac®

G & GLS for improved mixing

� Increased Scorch Safety

� Shorter Cure Cycles vs. Vamac® G & GLS

� Improved physical properties compared to Vamac® G & GLS

� Compounds at lower curative level (-20%) provide si milar CS to Vamac® G

compounds

� Better compressive stress relaxation than Vamac® G & GLS and HT-ACM

� Significant improvement of compression Set

�Superior processing performances

� Vamac® Ultra LT for better low temperature flexibility & dynamic properties

at low temp

Summary

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The information set forth herein is furnished free of charge and is based on technical data that DuPont believes to be reliable and falls within the normal range of properties. It is intended for use by persons having technical skill, at their own discretion and risk. This data should not be used to establish specification limits nor used alone as the basis of design. 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 product, evaluation 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.

Caution: Do not use in medical applications involving permanent implantation in the human body. For other medical applications, discuss with your DuPont customer service representative and read Medical Caution Statement H-50103-3.

Copyright© 2010 DuPont™. The DuPont Oval logo, DuPont™, The miracles of science™, DuPont™ Viton® are registered trademarks of E.I. du Pont de Nemours or its affiliates. All rights reserved.

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COMPOUNDS VM 3680 VM3681 VM 3682 VM 3685 VM 3686

Vamac® G 100Vamac® Ultra LT 100 100Low T ACM 100Low T HNBR 100

Naugard® 445 2 2 2 2 1Armeen® 18 D 0.5 0.5 0.5 0.5Vanfre® VAM 1 1 1 1Stearic Acid 1.5 1.5 1.5 1.5

Spheron® SOA N-550 50 65 50 6 40Rhenosin W 759 17.5

Rubber Chem Diak™ No.1 1.25 1.25 1.25 0.6Ekaland DOTG/C 2 2 2 1Rhenogran DPG 80 2.5 2.5 2.5 1Di-Cup® 40 C 6Sartomer 350 2Zinc Oxide active 3.5MMBI 0.5

Comparison to other low Temp polymers Compounds

new vamac ultra - ber-pa vamac ultra.pdf · new vamac ® ultra dupont performance ... 11.6 6.1 0.5...

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