ChenGuang Fluoroelastomer Terpolymer Gum

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

Latest Update: Jan 2006.

Index:

Molecular formula
Properties
Applications
Technical Features

Specifications Data
Fluid Resistance Comparisons

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 275^oC.
Working for short period at 320^oC.
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 -35^oC ~-50^oC ,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)@121^oC	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 @ 200^oCX24hr	Weight Increasing Rate	4.6 %	4.4 %
RP-1 Kerosene @ 200^oCX24hr	Volume Increasing Rate	11.4 %	11.8 %
12# Red Oil @ 200^oCX24hr	Weight Increasing Rate	/	2.5 %
12# Red Oil @ 200^oCX24hr	Volume Increasing Rate	/	6.1 %
4109# Diester Oil @ 200^oCX24hr	Weight Increasing Rate	9.5 %	4.7 %
4109# Diester Oil @ 200^oCX24hr	Volume Increasing Rate	19.5 %	9.7 %
4104# Diester Oil @ 130^oCX24hr	Weight Increasing Rate	/	2.2 %
4104# Diester Oil @ 130^oCX24hr	Volume Increasing Rate	/	5.1%
10# Red Oil @ 150^oCX24hr	Weight Increasing Rate	1.1 %	/
10# Red Oil @ 150^oCX24hr	Volume Increasing Rate	2.5 %	/
8# Red Oil @ 175^oCX24hr	Weight Increasing Rate	/	1.1 %
8# Red Oil @ 175^oCX24hr	Volume Increasing Rate	/	5.1 %

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

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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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