C series FKM

Features

               Medium molecular weight distribution

Uses

Shaft seals, gaskets,O ring, extruded shapes, molded tubing

Forms

White or light-yellow flake

Items

Typical Value

Test Method

C227

C727

C927

Physical Properties

Fluorine Content（mass%）

66

66

66

Density（g/cc）

1.78~1.84

1.78~1.84

1.78~1.84

ASTM D297

Mooney Viscosity

20~45

60~80

≥100

79

ASTM D1646 ML 1+10 at 121°C

Water content

0.15

0.15

0.15

ASTM D 5668

Solubility

Soluble in lower ketones and esters

Vulcanization Properties

T10（s）

<70

<70

<70

ASTM D5289

T90（s）

<140

<140

<140

ASTM D5289

Mechanical Properties

Tensile strength（MPa）

14.0

14.0

14.5

ASTM D412 Method A

100% Modulus

5.0

5.2

5.4

ASTM D412 Method A

Elongation at Break（%）

190

180

170

ASTM D412 Method A

Tearing Strength（KN/m）

20

20

20

ASTM D624

Hardness, Shore A

76

76

76

ASTM D2240, Type A

Compression Set

17

17

17

ASTM D395, Test B 70 hours at 200℃

Air-oven aging

ISO 188 After Dry Heat Aging;70 hours at 230℃

Tensile strength change rate（%）

-12

-10

-8

ASTM D412 Method A

Elongation at Break change rate（%）

-8

-6

-5

ASTM D412 Method A

Hardness change, Shore A

-2

-2

-1

ASTM D2240, Type A 

Thermal Properties

Glass Transition Temp, Tg（℃）

-20

-20

-20

ASTM D1329

Brittleness Temperature（℃）

-30

-30

-30

ASTM D2137

Chemical resistance Properties

Resistance to liquids

3 # standard oil

Volume change rate（%）

+2

+2

+1

ASTM D471 72 hours at 150℃

Mass change rate（%）

+1

+1

+1

ASTM D471 72 hours at 150℃

Formulation

Curing condition

Polymer            100      MT carbon black，N990   30

Calcium hydroxide    6        Magnesium oxide         3

Fluorocure-5#        2.5

Press

Oven

6min at 177°C

24h at 230°C