.

Composition

Ter-polymer of VDF, HFP and TFE

Characters

Medium to high viscosity gumstock without incorporated curatives

Process Targets

Molded goods, e.g. shaft seals; calendared goods, e.g. flue duct expansion joint

Curatives

Bisphenol or diamine

Typical Properties (Data not for specification purposes)

Fluorine Content, %

68

Specific Gravity

1.86

Color

Silver gray, translucent

Solubility

Low molecular ketones and esters

Mooney Viscosity ML 1+10@121

78

Typical Properties of Vulcanizate (Data not for specification purposes)

Compound

phr

Compound

phr

Polymer

100

Polymer

100

MT Black(N990)

30

MT Black(N990)

20

MgO

3

MgO

12

Ca(OH)₂

6

Diamine curative

3

Phosphonium Accelerator

0.5

Dihydroxy Crosslinker

2.0

Curing

condition

Press

10min at 170

20min at 170

Oven

24h at 230

24h at 230

Typical Rheological Properties

Monsanto Moving Die Rheometer (MDR2000®)

100cpm, 0.5°Arc, 15 minutes, 177

ML, Minimum Torque, N m

0.45

0.94

ts2, Time to 2 inch-lb rise from minimum

110

151

t90, Time to 90% cure

230

1045

MH, Maximum Torque, N m

3.0

3.17

Typcial Physical Properties

Press Cure

Post Cur

Bishphenol

10minutes@170

24hour @230

Diamine

20minutes@170

24hours@230

Tensile, Mpa (ASTM D412)

14.5

22.3

Elongation at break, % (ASTM D412)

220

250

Hardness, Shore A (ASTM D 2240)

78

78

Compression Set, %, [ASTM D395 Method B (Disc)]

Aged 70 hours @ 230

22

36