Tecnoflon® FKM Low Temperature grades are a wide portfolio including ionic and peroxide curable grades with TR10 range from -19°C to -40°C. They are specially designed for sealing solutions in oil drilling in cold environment as well as in the latest automotive engine technologies, like LPG, CNG and high-performance fuel injection systems.

The VPL Peroxide Curable grades are able to withstand the most stringent specifications for automotive and oil field applications, with TR10 down to -40°C and superior chemical resistance compared to standard low temperature FKM. 


Broad range of temperatures with no sacrifice in performance.

Tecnoflon® Low Temperature FKMs (VPL series) are designed for demanding sealing applications where they face temperatures as low as -40°C and aggressive chemicals found in Automotive, Oil & Gas and Aerospace environments.

Volume Swell in M15 [168H @23 °C]

Tecnoflon-volume-swell-in-M15

 

Processing

Readily processable: Tecnoflon® Low Temperature FKMs may be handled by traditional rubber processing methods.

Compression Molding: Compression molding is the oldest and most common form of molding of FKMs.

Transfer Molding: A medium viscosity polymer is recommended. A careful consideration of cure rate is important to ensure scorch safety.

Injection Molding: Injection molding is the most demanding molding process. The injection molding grade selected should have a molecular weight distribution to achieve the best flow and good scorch safety with a very steep cure rate. Molding fouling must be minimized by using formulations minimizing process aids and metal oxides.

Extrusion: Extrusion of FKMs is used to form extruded shapes, tubing, O-ring cord, and compression molding pre-forms.

Typical Properties

Low Temperature Bisphenol Curable
T 636 T 636/L L 636 FOR TF 636 FOR 5361
Flourine Content (weight %) 65.5 65.5 66 65.5 65.5
Specific Gravity (g/cm3) 
ASTM D792
1.81 1.81 1.83 1.81 1.81
Rubber Mooney Visc. ML(1+10) @ 121°C (Units) 
ASTM D1646
34 22 35 31 21
Tensile Strength (MPa) 
ASTM D412C
18.5 17.5 17.3 18.4 17.8
Elongation at Break (%) 
ASTM D412C
187 187 187 165 175
Hardness (Shore A) 
ASTM 2240
74 73 73 76 74
C.Set 70h @200°C on #214 O-Ring (%) 
ASTM D395 
Method B
13 15 16 13 17
TR10 (°C) 
ASTM D1329
-19 -19 -21 -19 -19
Post Cure (8+16)h @ 250°C (8+16)h @ 250°C (8+16)h @ 250°C (8+16)h @ 250°C (8+16)h @ 250°C
Notes       1) 1)

 1) Cure incorporated

Low Temperature Peroxide Curable
  PL 458 PL 958 PL 557 PL 455 PL 855
Flourine Content (weight %) 66 66 65.5 64 64
Specific Gravity (g/cm3) ASTM D792 1.83 1.83 1.81 1.78 1.78
Rubber Mooney Visc. ML(1+10) @ 121°C (Units) 
ASTM D1646
29 53 35 19 54
Tensile Strength (MPa) 
ASTM D412C
20.8 20.4 19.5 21.3 20.8
Elongation at Break (%) 
ASTM D412C
182 192 210 227 248
Hardness (Shore A) 
ASTM 2240
73 72 71 70 69
C.Set 70h @200°C on #214 O-Ring (%) 
ASTM D395 
Method B
18 18 21 23 23
TR10 (°C) 
ASTM D1329
-24 -24 -29 -30 -30
Post Cure 4h @ 230°C 4h @ 230°C 4h @ 230°C 4h @ 230°C 4h @ 230°C
Notes 2) 2) 2) 2) 2)

1) Cure incorporated 
2) Low post-cure

Peroxide-Curable Extreme Low-Temperature

Compound recipe: 1P

Property Unit VPL 45730 VPL 85730 VPL 45535 VPL 55540 VPL 85540 VPL 75545 Test Method
Flourine Content Weight % 67 67 65 65 65 65  
Specific Gravity g/cm3 1.87 1.87 1.85 1.83 1.83 1.83 ASTM D792
Mooney viscosity 
(1+10) at 121°C
MU 25 45 25 25 45 32 ASTM D1646
Tensile Strength MPa 19.3 18.8 14.6 15.0 15.8 14.0 ASTM D412C
Elongation at Break % 176 187 166 172 174 200 ASTM D412C
Hardness Shore A 74 72 68 68 67 62 ASTM 2240
Compression set, 
70h at 200°C on 
#214 O-ring
% 19 22 20 21 20 22 ASTM D395 
Method B
TR10 °C -30 -30 -35 -40 -40 -45 ASTM D1329