Flurine® M series is a relatively narrow molecular weight fluoroelastomer copolymerized with vinylidene fluoride (VF2) and hexafluoropropylene (HFP). It is commonly used in the automotive, hydraulic, electrical and chemical industries. It has outstanding mechanical properties, very low compression set rate and moderate scorch time. It has excellent resistance to oils, fuels, aliphatics, aromatic hydrocarbons, lubricants and most inorganic acids.

General

Features

Narrow molecular weight distribution

Uses

Shaft seals, gaskets, O-rings, extruded shapes

Forms

White or light-yellow flake

Items

Typical Value

Test Method

M228

M728

M928

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

ASTM D1646 ML 1+10 at 121°C

Water content（%）

<0.15

<0.15

<0.15

ASTM D 5668

Vulcanization Properties

T10（s）

<110

<90

<70

ASTM D5289

T90（s）

<240

<210

<180

ASTM D5289

Mechanical Properties

Tensile strength（MPa）

14.0

14.5

15.0

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）

21

22

22

ASTM D624

Hardness, Shore A

70～80

70～80

70～80

ASTM D2240, Type A

Compression Set

16

15

15

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（%）

-10

-8

-5

ASTM D412 Method A

Elongation at Break change rate(%)

-8

-6

-6

ASTM D412 Method A

Hardness change, Shore A

-1

-1

-1

ASTM D2240, Type A 

Thermal Properties

TR10（℃）

-17

-17

-17

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