FLUOROELASTOMER FKM246 ( VDF+TFE+HFP)

1)The VDF+TFE +HFP , 2)Equivalent to DuPont Dow Viton B Elastomer. 3)High qanlity and competitive price

FKM246 technical data

Items		Data
		FKM2461	FKM2462	FKM2463
Gum	Density	1.841.88
	ML,121            1+10	2040	4170	71110
	Pyrolysis temperature,		320	340
Vulcanized rubber	Tensile strength		9	10
	Elongation at break		250	250
	Solvent Resistance (1#aviation kerosene, weight increment at 200,  24hr)            %		6	6

Note: vulcanization system used in FKM2461 and FKM2462 is bisphenol AF, while in FKM2463 is 3# vulcanizer. The vulcanizing temperature recommended is 170±5.

Main applications:

Ø        Widely used in aviation, automobile, petroleum and chemical industries, instrument and apparatus, architecture, etc.

Ø       Mainly used for sealing materials requiring good resistance to high temperature, oil and corrosion, e.g. O" rings, "V" rings, gasket, sealing bowl with metal bone, tube/hose, etc.

Properties:

Gum

Ø        Non-toxic, odorless, non-flammable, self-extinct and very stable in stock;

Ø        Good solubility in low-molecular ketones (acetone, butanone) and ethers (acetic ether, butyl acetate).

Ø        Gum is useless untill it becomes vulcanized rubber articles by adding certain additives

Vulcanized rubber

Physical and Mechanical properties

Ø        Good physical and mechanical properties, depending on the different formulations and vulcanization processes;

Ø        Excellent wear resistance, with only a mass loss of 0.198g after 1000 turns in the Shore abrader under 1kg loads;

Ø        Far smaller permanent compression set when using Bisphenol AF vulcanization system instead of general vulcanization system.

Ø         

 Heat-resistance

Ø        Little changes in the tensile strength as the temperature increases, after aging at 275 for 24hs;

Ø        Service for long period under 275, service  for short period at 320. 

Ø         

 Low temperature resistance

Ø        The elasticity of FKM246 keeps down to -15;

Ø        Sealing capability even keeps at -49 by using low-compression deformation formula.

Ø         

Resistance to oils, solvents and chemicals

Ø        Good stability against inorganic acids (HF, H2­­SO4, HNO3 etc.), high-concentrated H2O2 and other oxidants;

Ø        Eexceptional resistance to nonpolar oils, fuels, organic solvents;

Ø        Extremely little volume increment in mixed methanol-fuels.

Ø        For comparison, FKM2311Q has a better resistance to acid, FKM26 has better oil-resistence, and FKM246 has excellent resistance in both oil and acid

The comparison of the oil-resistance of FKM246 and Du Pont Viton B:

Brand	RP-1 kerosene 200×24hw/v	4109#di-esters oil 200×24hw/v	10#oil of camphor 200×24hw/v	8# oil of camphor 200×24hw/v
FKM246	4.1/11.8	4.7/9.7	/	1.1/5.1
vitonB	4.3/11.2	5.0/9.4	/	1.1/1.8

Ø         

Ø         

Ø        Electro-insulating property and fire resistance

Ø        Insulation properties of fluoroelastomers are mainly depending on the fillers kinds and quantities used in formula;

Ø         

Ø        FKM26 is able to burn when approaching fire, but immediately selfextinct when leaving flame.

Weather and ozone resistance

Ø        Best ozone resistance than any other rubbers;

Ø        No change in the physical and mechanical properties when exposed in open air for several years;

Ø        No chap occurring when put in atmosphere with a ozone concentration of 0.01% for 1000hs;

Ø        Good stability against microbe;

Ø        Moderate resistance to radiation. An increase in radiation dose results in higher hardness, larger permanent compression set, lower tensile strength and elongation.

Permeability and vacuum resistance

Ø        Very slow gas diffusion speed and little permeability;

Ø        Excellent sealing property, works well even at such high vacuum of 1.333×10-71.333×10-8pa

FLUOROELASTOMER FKM246 ( VDF+TFE+HFP)