VTR-9209

Fluoroelastomers

Extrusion and HoseFKM Precompound

Technical Information
Introduction
Viton VTR-9209 is a precompound containing an
improved 69% fluorine ”B-type” fluoroelastomer. This
precompound incorporates a bisphenol cure systemthat can be optionally compounded with peroxide andcoagent for “dual curing.” Viton™ VTR-9209 offers a unique
combination of processing and cured characteristics
including:™

• High quality, smooth extrudate surface and appearance
at thickness less than 1.0 mm (0.040 in)• Excellent ”green” strength that helps maintain extrudate
shape, as well as enabling draw down to very thin veneer
thicknesses• Excellent fuel permeation resistance• Good tensile strength• Good adhesion to other elastomers in multilayer hoses
Viton™ VTR-9209 is especially attractive for use in themanufacture of low permeation fuel and filler neck hose
for automotive and small engine applications. It also works
well for any hose requiring a thin FKM layer. This productis superior in extrusion processability, compared to manyother types of Viton™, including Viton™ B-202 and B-600
blends.
When used at a 1–1.5 phr level, Carnauba wax and VPA 2process aids each create a smooth finish and result ingood metal release. Combinations of these process
aids with Struktol® WS280 can provide other desirable
characteristics to some compounds. Viton™ VTR-9209
is not suggested for use in applications above 250 °C(482 °F).

The heat resistance of VTR-9209 can be maximized by
the use of a dual cure system of VC-7 and peroxide in
conjunction with the incorporated bisphenol cure. See
compound three in Table 1 for a dual cure example.

Product Description
Chemical Composition

Copolymer of hexafluoropropylene,
vinylidene fluoride, and tetrafluoroethylene
plus bisphenol curative

Physical Form

SheetColorOff-whiteOdor

None

Specific Gravity

1.86

Storage Stability

Excellent

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

30

Viton™

Fluoroelastomers

Table 1. Properties of Viton™ VTR-9209
Viton™
VTR-9209

Viton™
VTR-9209

Viton™
VTR-9209

High MgO

Dual Cure

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

30

Viton VTR-9209

100100100

Elastomag® 170 (MgO)

366MT Black (N-990)30

30

30Ca(OH)2 HP-XL

633Viton Curative No. 7 (VC-7)

—

—

0.6™

™

®

Varox DBPH-50

—

—

0.6

Total phr Lab

139139140.2

Minimum

32

27

26

2 Pt. Rise, min>30

>30

>30

5 Pt. Rise, min

—

—

—

10 Pt. Rise, min———

M-L, dNm

1311

10

ts-2, min

3.2

3.3

3.0t’50, min

5.5

7.5

6.4

t’90, min

6.3

8.5

13.6

M-H, dNm

6363

85

M-L, dNm

1.5

1.3

1.3

ts-2, min

1.3

1.6

1.3

t’50, min

1.7

2.1

1.8t’90, min

2.3

3.0

2.8t’95, min

2.7

3.6

3.6

M-H, dNm

17.1

16.7

18.9

M-10, MPa

1.2

1.1

0.9

M-25, MPa

1.9

1.7

1.5

M-100, MPa

3.5

3.5

4.2

Tensile, MPa

7.9

8.3

8.8

Elongation, %359

368245

Mooney Scorch at 121 °C (250 °F)

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

MDR2000 at 177 °C (351 °F), 0.5° Arc, 100 Range, 12 Min Clock

Physical Properties at RT­—Original (Cured 30 min at 162 °C [324 °F]—No post-cure)

Hardness, A, pts

74

70

68

Spec. Gravity

1.875

1.886

1.835
continuedViton™

Fluoroelastomers

Table 1. Properties of Viton™ VTR-9209 (continued)
Viton™
VTR-9209
Gum Mooney, ML 1 + 10 at 121 °C (250 °F)

Viton™
VTR-9209

Viton™
VTR-9209

High MgO

Dual Cure30

Physical Properties at RT­—Original (Cured 30 min at 162 °C [324 °F]—16 hr post-cured at 232 °C [450 °F])
M-10, MPa

1.5

1.2

1.7

M-100, MPa

4.7

4.4

6.8

Tensile, MPa

11.0

11.8

12.1

Elongation, %

260

255

175

Hardness, A, pts

767379Adhesion to Tie Gum—180° Peel (1.4 N/mm minimum needed to pass std. hose specs) to NBR722C (40 min at 162 °C [324 °F ] cure)
Initial Peak, Median, N

138

14396

Median Bond, N/mm

5.4

5.3

3.1

Mean Bond, N/mm

4.9

5.6

3.1

M-100, MPa

2.5

2.6

2.9

Tensile, MPa

7.3

7.8

7.3

Elongation, %

403

421

296

Hardness, A, pts

6664

62% Change, M100

–28%

–24%

–30%% Change, T-B–8%–6%–17%% Change, E-B

12%

14%

21%

Pts Change–8–6–6

Volume Increase, %

6.1

6.7

8.1

70 hr at 70 °C (158 °F)

3430

1770 hr at 150 °C (302 °F)

807060Physical Properties at RT—Aged 168 hr at 23 °C (74 °F) in 90% Fuel C/10% Ethanol (CE-10)

Change in Physical Properties After 168 hr at 23 °C (74 °F) in 90% Fuel C/10% Ethanol (CE-10)

Compression Set, Method B, PliedNo Post-Cure

Post-Cured 16 hr at 232 °C (450 °F)
70 hr at 150 °C (302 °F)

25171870 hr at 200 °C (392 °F)

333135

Fuel C

3.0

3.4

3.7

CM-15 Fuel14141433

3344

Fuel Immersions, % Volume Swell — 168 hr at 23 °C (74 °F) (No post-cure)

Fuel Permeation — ASTM E96 Thwing Albert Cup — 672 hr at 40 °C (104 °F) (No post-cure)CE-10, g-mm/m2/day

Viton™

Fluoroelastomers

Test Procedures
Property Measured

Test Procedure

Compression Set

ASTM D3955, 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)

MDR

ASTM D5289

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)

Volume Change in Fluids

ASTM D471

Permeation

ASTM E96

Adhesion

ASTM D413

Note: 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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