GLT-200SFluoroelastomers

Technical Information
Introduction
Viton™ GLT-200S* fluoroelastomer is a 64% fluorine,
peroxide-cured, low temperature fluoroelastomer similar
to Viton™ GLT-600S, but with a significantly lower gum
polymer viscosity of ~25 (ML at 121 °C [250 °F]).
GLT-200S utilizes the latest technology from Chemours,
Advanced Polymer Architecture (APA), which includes anovel peroxide cure site along with an optimized molecularweight distribution.
Features• Cures exceptionally fast to a high state of cureisocyanurate) is NOT suggested, as it causes poormold release and high compression set. Viton™ Curative
No. 7 (VC-7) is the suggested coagent for all GLT-200S
compounds and usually used at a 2.5 phr level or lower,
unless high modulus is needed. High levels of VC-7 canbleed out and cause molding flaws.
Safety and Handling
Before handling or processing Viton™ GLT-200S, be sure
to read and be guided by the suggestions in the Chemours
technical bulletin, “Handling Precautions for Viton™ andRelated Chemicals.”• Is ideal for blending with Viton™ GLT-600S to reachintermediate viscosity ranges for injection molding

Product Description• Improved mold release/mold fouling properties

Chemical Composition• Improved mold flow and less shear sensitivity than
65 Mooney Viton™ GLT-600S

Copolymer of perfluoro­methylvinyl ether,vinylidene fluoride, and tetrafluoroethylene
with a cure site monomer

Physical Form

Sheet

• Excellent physical properties with high elongation, bothoriginal and aged

Appearance

White to tanOdor

None

Mooney Viscosity, ML 1 + 10
at 121 °C (250 °F)

25Specific Gravity

1.80

Storage Stability

Excellent

Fluorine, %~64

• Heat, fluids, and low temperature resistancecomparable to Viton™ GLT-600S• Improved water resistance/lower volume swell in water• Excellent compression set resistance with either low or
no post-cure
Processing
A load factor of 72%+ for internal mixing of GLT200S is recommended. The suggested process aids
for GLT-200S are 0.75 phr of Struktol® HT290, either
alone or in combination with 0.5 phr of PAT-777, orcombinations of 0.5 phr Armeen® 18D with carnauba
wax or Struktol® WS280. The use of TMAIC (trimethallyl*Viton™ GLT-200S was formerly named VTR-8505.

Viton™

FluoroelastomersTable 1. General Properties of Viton™ GLT-200S Compared with Viton™ GLT-600S
Viton™ GLT-200S50/50 Blend

Viton™ GLT-600S

ML-10 at 121 °C (250 °F) (gum polymer)

205166

Viton GLT-200S

10050—™

Viton GLT-600S—50100

Zinc Oxide

333N990303030Viton™ Curative No. 7 (VC-7)

333Varox DBPH-50

333Total

139

139

139

™

®

Mooney Scorch at 121 °C (250 °F)
Minimum

132745

2 Pt. Rise, min

28.9

26.3

21.7

5 Pt. Rise, min

>30

28.8

23.8

10 Pt. Rise, min—>30

25.8

ODR at 162 °C (324 °F), 3° Arc, 100 Range, 30 Min Clock
M-L, dNm

51325ts-2, min

1.4

1.3

1.2t’50, min

2.8

2.7

2.7t’90, min

4.4

4.3

5.1M-H, dNm

136138127

M-L, dNm

0.5

1.4

2.6ts-2, min

0.4

0.4

0.4t’50, min

0.6

0.6

0.7t’90, min

1.0

1.0

1.1

MDR 2000 at 177 °C (350 °F), 0.5° Arc, 100 Range, 6 Min Clockt’95, min

1.3

1.3

1.5

M-H, dNm

29.1

28.026.4

Rosand Capillary Rheometer at 100 °C (212 °F), 1.5 mm die—L/D = 0/1 and 10/1Shear Rate (sec–1)
113

3.1

4.7

5.3

452

5.0

6.1

6.9

1,129

6.5

7.7

8.3

2,221

7.9

9.3

10.0Spider Mold Flow Test—Sprue 0.8 mm (0.031 in)—Transfer Pressure 103 bar—(Cured 7 min at 177 °C [350 °F])
Total Shot Weight, g

31.7

32.0

31.8

Weight of Spider, g

24.8

14.5

9.8

Fill Factor, %784531
continued2

Viton™

Fluoroelastomers

Table 1. General Properties of Viton™ GLT-200S Compared with Viton™ GLT-600S (continued)
Viton™ GLT-200S50/50 Blend

Viton™ GLT-600S

Physical Properties at RT—Original (Cured 7 min at 177 °C [350 °F]—No post-cure)
M-10, MPa

0.63

0.72

0.7

M-100, MPa

3.1

3.4

3.2

Tensile, MPa

11.4

12.4

13.8

T-B, psi

1,656

1,795

2,001

Elongation, %

256

292

310

Hardness, A, pts

66

66

64

10.1

10.6

“Hot” Tear Strength at 150 °C (302 °F)—Original (Cured 7 min at 177 °C [350 °F]—No post-cure)
Tear Die B (nicked), N/mm

9.4

Physical Properties at RT—Original (Cured 7 min at 177 °C [350 °F]—Post-cured at 232 °C [302 °F] as noted)
2 hr2 hr2 hr

M-10, MPa

0.7

0.8

0.6

M-100, MPa

3.7

3.9

3.5

Tensile, MPa

16.2

18.2

18.4

T-B, psi

2,350

2,642

2,671

E-B, %

254

298

308

Hardness, A, pts

686767131113– No Post-cure

23

2625

– Post-cured at 232 °C (450 °F)

2020

20

–32.8

–32.9

–32.8

M-10, MPa

0.7

0.8

0.7

% Change, M10

0–1

7M-100, MPa

3.3

3.6

3.1% Change, M100

–9–9–11Tensile, MPa

19.5

19.2

18.2% Change, T-B

20

6–1Elongation, %

328

325

346% Change, E-B

29912Hardness, A, pts

676767Pts Change–100Compression Set, Method B, O-Rings
22 hr at 200 °C (392 °F)– Post-cured at 232 °C (450 °F)
70 hr at 200 °C (392 °F)

Low Temperature Testing
Tg by DSC, °C
Physical Properties at RT—Heat Aged 70 hr at 250 °C (482 °F) in Ovencontinued

3

Viton™

Fluoroelastomers

Table 1. General Properties of Viton™ GLT-200S Compared with Viton™ GLT-600S (continued)
Viton™ GLT-200S

50/50 Blend

Viton™ GLT-600S

Physical Properties at RT—Heat Aged 70 hr at 275 °C (527 °F) in Oven
M-10, MPa

0.7

0.8

0.7% Change, M10355M-100, MPa

3.8

3.7

3.2% Change, M100

4–5–10Tensile, MPa

13.6

13.8

13.7% Change, T-B–16–24–26

Elongation, %250

273

307

% Change, E-B–2–80Hardness, A, pts

676767

Pts Change–100

Physical Properties at RT—Aged 168 hr at 150 °C (302 °F) in ASTM #105 Oil (5W/30)
M-10, MPa

0.8

0.8

0.8% Change, M1015834M-100, MPa

3.9

4.1

4.3% Change, M100

7522Tensile, MPa

8.9

8.6

8.6% Change, T-B–45–53–53

Elongation, %165

156

158% Change, E-B–35–47–49

Hardness, A, pts

706969Pts Change

222

Volume Swell, %

0.7

0.8

0.7

Fluid Immersions—Volume Swell
Fuel C, 168 hr at 23 °C (73 °F)

8.6

8.3

8.6

CM15 Fuel, 168 hr at 23 °C (73 °F)

32.0

36.4

28.8

Distilled Water, 168 hr at 100 °C (212 °F)

3.9

3.8

3.2

4

Viton™

Fluoroelastomers

Test Procedures
Property Measured

Test Procedure

Compression Set

ASTM D395, Method B (25% deflection)

Compression Set, O-Rings

ASTM D395, Method B (25% deflection)

Hardness

ASTM D1414, durometer A

Mooney Scorch

ASTM D1646, small rotor at 121 °C (250 °F)

Mooney Viscosity

ASTM D1646, ten pass at 121 °C (250 °F)

ODR (oscillating disk rheometer)

ASTM D2084

Property Change After Heat Aging

ASTM D573

Stress/Strain Properties
100% Modulus
Tensile Strength (T-B)
Elongation (E-B)

ASTM D412, pulled at 8.5 mm/sec (20 in/min)

Temperature Retraction (TR-10)

ASTM D1329

Volume Change in Fluids

ASTM D471

Test temperature is 23 °C (73 °F), except where specified otherwise.

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The information set forth herein is furnished free of charge and based on technical data that Chemours believes to be reliable. It is intended for use by persons having technical skill, at their own
discretion and risk. The handling precaution information contained herein is given with the understanding that those using it will satisfy themselves that their particular conditions of use present
no health or safety hazards. Because conditions of product use are outside our control, Chemours makes no warranties, express or implied, and assumes no liability in connection with any useof 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 under or arecommendation to infringe any patents.
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