New Vamac Ultra - BER-PA Vamac Ultra.pdf · New Vamac ® Ultra DuPont Performance ... 11.6 6.1 0.5...
Transcript of New Vamac Ultra - BER-PA Vamac Ultra.pdf · New Vamac ® Ultra DuPont Performance ... 11.6 6.1 0.5...
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
168 Hr 504 Hr Lubrizol168 Hr
IRM-90370 Hr
Dexron VI168 Hr
Dexron V1008 Hr
Dry heat 175 °C Oil resistance 150 °C
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
168 Hr 504 Hr Lubrizol168 Hr
IRM-90370 Hr
Dexron VI168 Hr
Dexron V1008 Hr
Dry heat 175 °C Oil resistance 150 °C
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
Vamac® Ultra IP vs. ACM
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
Vamac® Ultra IP vs. ACM
HT ACMHT ACM VMX 3110Ultra IP Ultra IP
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)
2 phr Naugard 445, 1 phr stearic acid, 0.5 phr Armeen 18 D, 1 phr Vanfre Vam
2323
Vamac® Ultra IP vs. ACM
HT ACMHT ACM VMX 3110Ultra IP Ultra IP
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)
2 phr Naugard 445, 1 phr stearic acid, 0.5 phr Armeen 18 D, 1 phr Vanfre Vam
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
with 1.5 phr Diak® 1
Vamac® G
with 1.5 phr Diak® 1
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
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- 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
Vamac® G Vamac®Ultra LT,
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
Vamac® G Vamac®Ultra LT,
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.
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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