Acronymes Matériaux

S.I.

Chemical Terminology

Features

Min. operating temperature °C

Max. operating temperature °C

Chemical Resistance

NR

Natural Rubber

Excellent physical-mechanical property.

Very good elastic resilience and high abrasion resistance.

-50

+80

Quite good resistance to seawater and acid with average concentration.

IR

Synthetic Polyisoprene

Good mechanical property. Good elastic resilience.

Can be used with SBR-NR.

-50

+90

Quite good resistance to seawater and acid with average concentration.

BR

Polybutadiene

Excellent elastic resilience.

Excellent resistance to abrasion. Can be used with SBR, NR,IR,NBR.

-45

+90

Quite Good resistance to seawater and acid with average concentration.

SBR

Butadiene-Styrene Copolymer

Great physical and mechanical property. Good resistance to abrasion and to permanent deflection.

-40

+100

Great resistance to some kind of Freon , glycols and hydraulic fluids.

EPM

Propylene-Ethylene Copolymer

Excellent resistance to heat , ozone and high temperature. High resistance to permanent deflection. Can be vulcanized just with peroxide.

-45

+150

Good resistance to water and glycols, to aggressive chemical substances and oxidation. Excellent resistance to steam up to 150°C.

EPDM

Ethylene-Propylene Terpolymer

Excellent resistance to heat , ozone and high temperature. High resistance to permanent deflection. Excellent resistance to water and steam up to 150°C

-45

+150

Good resistance to water and glycols, to aggressive chemical substances and oxidation. Excellent resistance to steam up to 150°C.

CR

Polychloroprene

Great resistance to ozone and seawater. Good Flame resistance and self-extinguishing property is possible.  Good resistance to animal and vegetable fats.

-45

+110

Good resistance to fats ,ozone and solar light ,weather conditions, flame and several kind of Freon.

NBR

Butadiene-acrylonitrile copolymer

Great resistance to oil. Good physical-mechanical property. From good to excellent impermeability to air and gas.

-40

+130

Great resistance to oil , mineral vegetable and animal fats , Hydrocarbons and gas.

HNBR

Hydrogenated Nitrile Butadiene Rubber

Excellent physical-mechanical property. Excellent resistance to temperature of 150°C . Very high resistance to permanent deflection and abrasion.

-40

+150

Great resistance to oil , mineral vegetable and animal fats , hydrocarbons and gas and several kind of Freon.

CSM

Chlorosulphonated  Polyethylene

Excellent physical-mechanical property. Excellent resistance to flame, ozone ,weather conditions and Heat . Excellent impermeability to air and gas.

-35

+120

Excellent resistance to aggressive and very oxidant chemical substances, to acids and strong mineral basis, seawater,

saline solutions , hypochlorites and alcohol.

ACM

Acrylate - Ethylene  Copolymer

Excellent impermeability to air and gas.

Excellent resistance to oil up to 150°C. Very good resistance to ozone , weather conditions and UV radiation.

-30

+150

Excellent resistance to

aliphatic oil, oxygen , ozone, weather conditions, heat and to high temperature.

AEM

Ethylene Acrylic Rubber

Excellent impermeability to air and gas. Low elastic resilience.

Excellent resistance to oil up to 170°C and to heat. Low values of permanent deflection also at high temperature.

-30

+170

Excellent resistance to

aliphatic oil, oxygen , ozone, weather conditions,

heat  and to high temperature.

EU

Urethane Polyether Rubber

Excellent resistance to abrasion and tear strength . Excellent mechanical property ( tensile strength and elongation).

Good impermeability to air , several gas and to hydrolysis.

-30

+100

Excellent resistance to

hydrolysis , saline solutions and seawater.

AU

Urethane Polyester Rubber

Excellent resistance to abrasion and tear strength . Excellent mechanical property ( tensile strength and elongation).

Good impermeability to air , several gas and oil.

-30

+100

Excellent resistance to oil, mineral and animal fats and aliphatic hydrocarbons.

ECO

Poli-epichlorhydrin 

Good flame resistance and good mechanical property .Good flexibility at low and high temperature. Excellent impermeability to air and gas. Excellent resistance to ozone.

-40

+135

Great resistance to oil, mineral vegetable and animal fats and to glycols.

VMQ

Silicone

Insensitivity to thermal excursion. Excellent electrical insulation, with appropriate productive process : non-toxicity and possible thermal grades and of electrical conductivity.

-65

+200

Great resistance to water and water solutions, to weather conditions, ozone and UV radiation, animal and vegetable oil and glycols.

PVMQ

Polifenilvinilmetilsilossano

Excellent resistance to very low temperature.

-110

-

Great resistance to water and water solutions, to weather conditions, ozone and UV light, animal and vegetable oil and glycols.

FVMQ

Fluorosilicone

Very similar features to the silicone ones , but with higher chemical resistance to oil , M15, etc.

-55

+200

Great resistance to aliphatic and aromatic hydrocarbons, mineral oil , ozone and UV lights. Fair resistance to gasoline.

FPM/FKM

Fluoroelastomer

Excellent resistance to chemical agents ,lubricants , heat and flame , ozone and UV lights. Great behavior to permanent deflection (compression set).

-25/-30/-40

+280

Special chemical agents , for which is ensured an excellent resistance in a wide range of temperature , are :

Aliphatic ,chlorinated and aromatic hydrocarbons, fluel, oil and vegetable mineral fats , hydraulic fluid in general.

FFKM

PerFluoroelastomer

Very high chemical inertia in aggressive applications, including aldehydes and ketones with low molecular weight.

-125

+310

Excellent with aldehydes and ketones with low molecular weight.

TFE/P

AFLAS® Tetrafluoroethylene

Propylene Copolymer

Very similar features as the fluorinate ones , but with higher chemical resistance in special applications. Steam and base oil resistance.

-20

+280

Chemical resistance as the fluorinate ones. Great resistance to saturated steam at 180/200°C , strong mineral acids and bases  and their solutions.

TFE/P/VDF

AFLAS®  Tetrafluoroethylene

Propylene Terpolyme

Great resistance to steam and basic substances

-20

+280

Excellent resistance to basic oil and amins.