Fluoroelastomer Terpolymer Gum (VdF - TFE - HFP)
(Equivalent to DuPont Dow Viton B  Elastomer)


Latest Update: Jan  2006.

Index:
  1. Molecular formula
  2. Properties
  3. Applications
  4. Technical Features
  1. Storage and Transportation

1. Molecular formula:

      -{-(CF2-CH2)65-(CF2-CF2)20-[CF2-CF(CF3)]15-}n-

2.Properties:

  • Excellent resistance to high temperature:
  • Working for long period under 275oC.
  • Working for short period at 320oC.
  • Excellent resistance to chemical mediums.Good stability against organic liquid(oils,fuels,solvents,hydraulic oils,etc.),inorganic acids,highly-concentrated H2O2 and other oxidants.Much better than other rubbers;
  • Not good resistance to M.W. ketones,esters,some ethers,NH3,NH4+,HF;
  • Good mechanical properties,insulating properties,corrosion resistance;
  • Common cold resistance;
  • Brittle point -35oC ~-50oC ,various with formulation and thickness of the products;the thicker,the brittle point higher.

3.Application:

Wildly used in aviation,automobile,petroleum,and chemical industries,etc. as sealing material,to resist high temperature,corrosion,oils(especially di-ester oils,silicate ester,etc.).Usually be made into sealing rings,sealing bowls,sealing tubes,and so on.Besides,used in fabric coating to resist heat and /or corrosion.
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4.Technical features: 

        Table 1. Specifications Data

SPECIFICATION

DATA

FPM 2461 FPM 2462 FPM2463
GUM
Appearance white or yellowish slabs
Fluorine Content 68.2% ~ 69.0%
Moisture Content < 0.5%
Density, g/cm3 1.84 ~ 1.88

Nominal Mooney Viscosity,

ML(1+10)@121oC

20 ~ 40 50 ~ 70 80 ~ 110
Grade Classification by viscosity A B c A B C A B C D
20 +/- 6 30 +/- 6 40 +/- 6 50 +/- 8 60 +/- 8 70 +/- 8 80 +/- 10 90 +/- 10 100 +/- 10 110 +/-10
Thermolysis temperature min.   320 oC min. 340 oC
VULCANIZED ELASTOEMR
Tensile Strength min. 8 MPa min.   9 MPa min. 10 MPa
Elongation at Break min.   230% min.   250%
Fluid Resistance (1# jet fuel), wt. 6% 6% 6%

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    Table 2. Fluid Resistance Comparisons                       (Note: Red oil i.e. campyhor oil)

    Chemical Environment

    2# Fluoroelastomer

    (copolymer)

    3# Fluoroelastomer

    (terpolymer)

    RP-1 Kerosene
    @ 200oCX24hr
    Weight Increasing Rate 4.6 % 4.4 %
    Volume Increasing Rate 11.4 % 11.8 %
    12# Red Oil
    @ 200oCX24hr
    Weight Increasing Rate / 2.5 %
    Volume Increasing Rate / 6.1 %
    4109# Diester Oil
    @ 200oCX24hr
    Weight Increasing Rate 9.5 % 4.7 %
    Volume Increasing Rate 19.5 % 9.7 %
    4104# Diester Oil
    @ 130oCX24hr
    Weight Increasing Rate / 2.2 %
    Volume Increasing Rate / 5.1%
    10# Red Oil
    @ 150oCX24hr
    Weight Increasing Rate 1.1 % /
    Volume Increasing Rate 2.5 % /
    8# Red Oil
    @ 175oCX24hr
    Weight Increasing Rate / 1.1 %
    Volume Increasing Rate / 5.1 %

           Viton(R) is a registered trademark of DuPont Dow Elastomers.

    Back to Specification Data Table
  • 5.Storage and Transportation notes:

    Store it In shady,cool and dry place. Avoiding heating, moistening and exposing to the sun in transportation. on-hazardous chemicals

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