VTR-9217

Fluoroelastomers

Extrusion and HoseFKM Precompound

Technical Information
Introduction
Viton VTR-9217 is a developmental precompound
based on a recently developed 69% fluorine “B-type”
fluoroelastomer (FKM). This precompound incorporates abisphenol cure system that can be optionally compoundedwith peroxide and coagent for “dual curing.” Superior thin
extrusions for fuel and filler neck hose can be achieved.
VTR-9217 has a unique combination of processing andcure characteristics, including:™

• High quality, smooth extrudate surface, and appearance
at thickness below 0.040 in or 1.0 mm

Carnauba wax or VPA No. 2 at a 1–1.5 phr level are
the most common process aids used with VTR-9217
to create a smooth finish and good metal release.
Combinations of these process aids with Struktol®
WS280 can enhance release to some compounds.
Table 1 compares VTR-9217 to higher MooneyVTR-9209.

Product Description• Excellent “green” strength that helps maintainextrudate shape, as well as enables drawdown to a
thickness of 0.008” or 0.2 mm

Chemical Composition

Copolymer of hexafluoropropylene,
vinylidene fluoride, and tetrafluoro­
ethylene plus bisphenol curative
chemicals and process aid

Physical Form

Sheet

• Lower viscosity, lower hardness, and better
compression set than VTR-9209, the first generationprecompound based on the same gum polymer

Color

Off-whiteOdor

None

Specific Gravity

1.82• Good fuel permeation resistance for a “B-type” FKM

Storage Stability

Excellent• Compounds show good adhesion and physicalproperties

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

20Automotive and small engine applications utilizing lowpermeation fuel and filler neck hose and tubing areexpected to find this product most attractive as anaffordable material. Chemours has found this productto be superior in extrusion processability compared toViton™ B-202 and B-600 blends.

Viton™

Fluoroelastomers

Table 1. General Properties of Viton™ VTR-9217 Compared with VTR-9209
Viton™ VTR-9209/Control

Viton™ VTR-9217

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

32

19Viton VTR-9209

100—

Viton VTR-9217

—100™
™

Elastomag 170

33

MT Black (N990)

3030

Calcium Hydroxide HP-XL

66Total phr139139®

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

32272 Pt. Rise, min

>30

23.2

5 Pt. Rise, min—>30

10 Pt. Rise, min——ODR at 162 °C (324 °F), 3° Arc, 100 Range, 30 Min Clock
M-L, in-lb

1311ts-2, min

3.2

2.3t’50, min

5.5

3.7t’90, min

6.3

4.3

M-H, in-lb

63

69

M-L, in-lb

1.5

1.2ts-2, min

1.3

0.9t’50, min

1.7

1.2t’90, min

2.3

1.5

MDR2000 at 177 °C (350 °F), 0.5° Arc, 100 Range, 12 Min Clockt’95, min

2.7

1.8

M-H, in-lb

17.1

14.7

10% Modulus, MPa

1.20.8

100% Modulus, MPa

3.5

3.2

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

7.9

7.9

Elongation, %359

302Hardness, A, pts

7466

70 hr at 70 °C (158 °F)

3424

70 hr at 150 °C (302 °F)

80

69

Fuel C, %VS

3.0

3.0

CM-15 Fuel, %VS

13.7

13.0

Specific Gravity

1.875

1.84

33

40

Compression Set, Method B, Plied

Fuel Immersions—168 hr at 23 °C (73 °F) (NPC)

Fuel Permeation—ASTM E91 Thwing Albert Cup—672 hr at 40 °C (104 °F) (NPC)
CE-10, g-mm/m2/day

Viton™

Fluoroelastomers

Test Procedures
Property Measured

Test Procedure

Compression Set

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)

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 at Break (E-B)

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

Volume Change in Fluids

ASTM D471

Permeation

ASTM E96

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

For more information, visit Viton.com
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 presentno 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.
NO PART OF THIS MATERIAL MAY BE REPRODUCED, STORED IN A RETRIEVAL SYSTEM OR TRANSMITTED IN ANY FORM OR BY ANY MEANS ELECTRONIC, MECHANICAL, PHOTOCOPYING, RECORDING OR OTHERWISEWITHOUT THE PRIOR WRITTEN PERMISSION OF CHEMOURS.

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Replaces: VTE-A10361-00-C0710
C-10977 (10/16)