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E.P.D.M.

Excellent resistance to ozone and oxygen. The EPDM rubber based products are immune to oxidizing agents in both static and dynamic conditions, without adding antioxidant and antioxone agents.

Excellent resistance to degradation caused by the atmosphere.

Good resistance to high temperature (up to 150 °C) both in dry and damp rooms (preserved mixtures).

Good resistance to low temperature: the flexibility mantains down to -55 °C.

Excellent dielectric properties.

Very good hardness to permanent deformations.

Very good mechanical and elastic characteristics and preservation of this property.

Good resistence to various chemical materials (organic and inorganic acids, alkali, amines, phosphoric esters, hydraulic liquids, antifreeze liquids, pickles, bleaching agents, biodegradable and un biodegradable detergents, vegetal oils and fats) and polar solvents with short molecular weight (alkali, eters, ketones, glycols). The resistance to the hydrocarbon solvents and to mineral oils is low.


Low resistance to the propagation of a fuel if their formula is not right.

Very high impermeability to water.

Resistence to the chemical agents of vulcanizated based EPDM
Chemical agents
 EPDM
Inorganic and organic acids
 G - E
Inorganical bases
 G - E
Oxone
 E
Oxigen
 E
Water steam
E
Water
 E
Oxidant agents (H 2 O 2 , HClO,
 
Sodium perborate agents )
E
Synthetic detergents
E
Vegetal fats and oils
 G
Mineral olis
 L
Aliphatic solvents
 L
Aromatic solvents
 L
Chlorinated solvents
 L
Solvents rich in oxygen (alcohols, ketones )
G

G = GOOD - E = EXCELLENT - L = LOW

Principal charcteristics of the EPDM elastomers
Properties
 measures EPDM Rules used for the measure
Specific weight
g/cm^2
0.865
ASTM D 792-66
Tensile stress
Kg/cm^2 50-220 ASTM D 412-66
Elongation to breakage
 % 150-700 ASTM D 412-66
Compression set
    ASTM D 395-67/B
22 hours at 70 °C
% 1-15 ASTM D 412-66
70 hours at 100 °C
% 14-70 ASTM D 464-54
Tear strenght
 Kg/cm 25-60 ASTM D 464-54
Hardness Shore A
points 30-90 ASTM D 676
Elastic efficiency
% 15-60 BS 903 part A8
Resistence to flame
 – RSF ASTM D 470-67T
Electric properties
– E ASTM D 150-65T
Abrasion resistence
cm 3 /1000 cycles G BS 903 part A9 (1967)
Water absorption
mg/cm 2 Low ASTM D 470-67T

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