GBL-200S

Fluoroelastomers

Technical Information
Introduction
Viton™ GBL-200S* fluoroelastomer is a next generation,easy processing, low viscosity, peroxide cured 68%
fluorine fluoroelastomer based on new Advanced
Polymer Architecture technology. Compared with theoriginal Viton™ GBL-200, Viton™ GBL-200S shows better
processability coupled with similar or improved fluids
resistance in aromatic hydrocarbons, alcohols, water,steam, and acids.
Featurescarnauba wax, or Struktol® WS 280. Viton™ CurativeNo. 7 (VC-7) co-agent is recommended for all Viton™
GBL-200S compounds. Used at a level of 2.5 phr or lessis satisfactory, unless high modulus is needed. At higherlevels, VC-7 can bleed out and cause molding flaws.
Safety and Handling
Before handling or processing Viton™ GBL-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™ GBL-600S to reachintermediate viscosity ranges

Product Description• Cures exceptionally fast to a high state of cureChemical Composition• Exhibits improved mold release/mold fouling properties
compared with Viton™ GBL-900 and Viton™ GBL-200

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

Physical Form

SheetAppearance

Off-white to tanOdorNone

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

25Specific Gravity

1.84

Storage Stability

Excellent

Fluorine, %~68

• Exhibits improved mold flow and less shear sensitivity
than 65 Mooney Viton™ GBL-600S• Exhibits excellent physical properties with highelongation, both original and aged compounds• Exhibits similar heat, fluids, and low temperature
resistance compared with Viton™ GBL-200• Exhibits excellent compression set resistance withlittle (2 hr) or no post-cure
Processing
A load factor of >70% for internal mixing of Viton™
GBL-200S is recommended. The recommended process
aids for Viton™ GBL-200S are 1 phr of Struktol® HT290, combinations of 0.5 phr Armeen® 18D with

*Viton™ GBL-200S was formerly named VTR-8655.

Viton™

Fluoroelastomers

Table 1. General Properties of Viton™ GBL-200S Compared with Viton™ GBL-200 and Viton™ GBL-600S
Viton™
GBL-200

Viton™
GBL-200S

50/50 Blend

Viton™
GBL-600S

Viton™ GBL-200

100———Viton™ GBL-200S—10050—™

Viton GBL-600S——50100

Zinc Oxide

3333N990 (MT Black)30303030

Viton™ Curative No. 7 (VC-7)

3333Varox® DBPH-50

3222Total phr

139

138

138

138

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

18192735

2 pt rise, min

26.2>30>30>30

5 pt rise, min29.0———

10 pt rise, min>30———ODR at 162 °C (324 °F), 3° arc, 100 range, 30 min clock
ML, dN.m

871014ts2, min

1.4

1.7

1.7

1.6t’50, min

3.0

3.1

3.1

3.1

t’90, min

9.8

4.7

4.6

4.8MH, dN.m

114150141132

MDR 2000 at 177 °C (351 °F), 0.5° arc, 100 range, 6 min clock
ML, dN.m

0.7

0.6

1.0

1.5

ts2, min

0.5

0.5

0.5

0.5t’50, min

0.7

0.7

0.7

0.7t’90, min

1.9

1.1

1.1

1.1

t’95, min

2.7

1.4

1.4

1.4MH, dN.m

18.3

30.4

29.3

27.9

Rosand Capillary Rheometer at 100 °C (212 °F), 1.5 mm die, L/D = 0/1 and 10/1Piston Speed, mm/min

Shear Rate, sec–1

12.7

113.1

Pressure (L/D = 0/1 die), MPa
4.2

4.0

4.7

4.1

50.8

451.7

6.2

5.7

5.7

6.0

127

1,128.7

7.9

7.2

7.4

7.7

250

2,222.1

10.0

8.6

8.9

9.4

0.7

0.7

0.7

Physical Properties at RT—Original (Cured 5 min at 177 °C [351 °F]—No post-cure)
M10, MPa

0.7

M100, MPa

3.4

3.2

3.4

3.1

Tb, MPa

12.6

13.2

13.4

13.0

Eb, %

291

319337314Hardness, A, pts

66676766

10.7

10.8

Hot Tear Die B at 150 °C (302 °F)—Original (Cured 7 min at 177 °C [351 °F]—No post-cure)
Die B, nicked, N/mm

9.1

10.3

continued2

Viton™

Fluoroelastomers

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

Viton™
GBL-200S

50/50 Blend

Viton™
GBL-600S

Physical Properties at RT—Original (Cured 5 min at 177 °C [351 °F]—Post-cured at 232 °C [450 °F])
16 hr

4 hr

4 hr

4 hr

M10, MPa

0.8

0.7

0.8

0.7

M100, MPa

5.4

4.2

4.4

3.7

Tb, MPa

20.6

19.6

20.1

17.6

Eb, %247

289317

278

Hardness, A, pts

70707069

Physical Properties at RT—Heat aged 70 hr at 250 °C (482 °F) in oven (slabs post-cured)M10, MPa

0.8

0.8

0.7

0.8

M100, MPa

4.5

3.8

3.7

3.7

Tb, MPa

18.7

19.7

18.9

18.8

Eb, %322

360

366

372

Hardness, A, pts

70707070

Pts change000

1% change, M10810–4

10% change, M100

–16–10–16

0% change, Tb–91–6

7% change, Eb

30241634

Physical Properties at RT—Heat aged 70 hr at 275 °C (527 °F) in oven
M10, MPa

0.7

0.7

0.8

0.6

M100, MPa

3.3

3.3

3.2

3.0Tb, MPa

12.1

14.4

13.3

12.3

Eb, %327

343

373

423

Hardness, A, pts

69

69

7069

Pts change–1–100% change, M10

–8

–4

–1

–10

% change, M100

–38

–23

–27

–20

% change, Tb

–41

–27

–34

–30

% change, Eb

32

1918

52

4.2

4.1

4.0

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

4.0

M15 Fuel, 168 hr at 23 °C (73 °F)

23222221Methanol, 168 hr at 23 °C (73 °F)

57535147Water, 168 hr at 100 °C (212 °F)

8.2

4.4

4.9

4.6

Compound Specific Gravity

1.860

1.861

1.861

1.863

Compression Set, Method B, O-Rings, 22 hr at 200 °C (392 °F)
No post-cure

37141416

Post-cured at 232 °C (450 °F)

29111414

–17.4

–18.8

–18.1

–17.2

Low Temperature Testing
Tg by MDSC, post-cured, °C

3Viton™

Fluoroelastomers

Test Procedures
Property Measured

Test ProcedureCompression Set

ASTM D3955, Method B (25% deflection)

Compression Set—Low Temperature

ASTM D1299, Method B (25% deflection)

Compression Set, O-Rings

ASTM D1414

Hardness

ASTM D2240, durometer A

Mooney Scorch

ASTM D1646, using the small rotor. Minimum viscosity and time to a1-, 5-, or a 10-unit rise are reported.

Mooney Viscosity

ASTM D1646, ten pass 100 °C (212 °F) and 121 °C (250 °F)

ODR (vulcanization characteristics measured with an oscillating disk cure meter)

ASTM D2084

Property Change After Oven Heat-Aging

ASTM D573

Stress/Strain Properties
100% Modulus
Tensile Strength
Elongation at BreakASTM D412, pulled at 8.5 mm/sec (20 in/min)

Stiffness, Torsional, Clash-Berg

ASTM D1043

Temperature Retraction

ASTM D1329

Volume Change in Fluids

ASTM D471

Test temperature is 24 °C (75 °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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Replaces: VTE-A10165-00-C0710
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