Rubber compounds: silicone, fluoro, synthetic and natural rubber compounds

Guida degli elastomeri principali

INTERNATIONAL
CLASSIFICATION 		CHEMICAL TERMINOLOGY PROPERTIES RANGE
TEMPERATURE 		CHEMICAL RESISTANCE
NR Natural rubber Excellent mechanical properties
Very good elastic properties
Extremely good abrasion resistance		 -50°C
+80°C		 Medium resistance to sea water,
acids and bases of medium concentration
IR Polyisoprene rubber Good mechanical properties
Good elastic properties
Blend with SBR and NR are allowed		 -50°C
+90°C		 Medium resistance to sea water,
acids and bases of medium concentration
BR Butadiene rubber Excellent elastic properties
Extremely good abrasion resistance
Blend with SBR , NR , IR and NBR are allowed		 -45°C
+90°C		 Medium resistance to sea water,
acids and bases of medium concentration
SBR Styrene butadiene rubber Good mechanical properties
Good abrasion resistance
Good resistance to permanent deformation		 -40°C
+100°C		 Good resistance to several Freon,
glycols and brake fluids
EPM Ethylene propylene copolymer Very good heat, high temperatures and ozone resistance
Very good resistance to permanent deformation
Only peroxide curing		 -45°C
+150°C		 Good resistance to water and glycols,
chemical and oxidation resistance,
very good steam resistance up to 150°C
EPDM Ethilene propylene terpolymer Very good heat, higt temperatures and ozone resistance
High resistance to permanent deformation
Very good water and steam resistance up to 150°C		 -45°C
+150°C		 Good resistance to water and glycols,
chemical and oxidation resistance,
very good steam resistance up to 150°C
CR Chloroprene rubber Good ozone and sea water resistance
Good flame resistance. Self-extinguish is possible
Good resistance to animal and vegetable fats		 -40°C
+110°C		 Good resistance to fats, ozone,
atmospheric agents and light fastness,
good flame and several Freon resistance
NBR Acrylonitrile butadiene rubber Good resistance to oils
Good mechanical properties
From good to excellent gas and air impermeability		 -40°C
+130°C		 Good resistance to oils
Good mechanical properties
From good to excellent gas and air impermeability
HNBR Hydrogenat
acrylonitrile butadiene
rubber		 Very good mechanical properties
Very good heat resistance up to 150°C
Excellent abrasion resistance and permanent deformation		 -40°C
+150°C		 Very good resistance to oils, mineral animal
and vegetable fats, hydrocarbons and gas,
very good resistance to several Freon
CSM Clorosolfonated polyethylene Excellent mechanical properties
Very good flame ,heat,ozone and atmospheric agents resistance
Excellent air and gas impermeability		 -35°C
+120°C		 Very good resistance to strong oxidant,
very good resistance to strong bases and acids,
very good resistance to sea water, saline solutions,
alcohols and hypochlorite
ACM Acrylic acid ester copolymer Excellent air and gas impermeability
Very good oils resistance up to 150°C
Very good ozone, atmospheric agents and UV rays resistance		 -30°C
+150°C		 Very good resistance to aliphatic oils, heat, oxygen,
ozone and weathering resistance,
good resistance at high temperatures oils
AEM Ethylene acrylic Excellent air and gas impermeability; low rebound resilience
Very good heat and oils resistance up to 170°C
Good permanent deformation at high temperature		 -30°C
+170°C		 Very good resistance to aliphatic oils,
weathering resistance, oxygen and ozone,
good resistance at high temperatures oils
EU Polyuretane polyether Excellent abrasion and tear resistance
Very good mechanical properties(tensile strength and elongation at break)
Good air and several gas impermeability .Good hydrolysis resistance		 -30°C
+100°C		 Good hydrolysis, sea water and
saline solutions resistance
AU Polyuretane polyether Excellent abrasion and tear resistance
Very good mechanical properties(tensile strength and elongation at break)
Good air and several gas impermeability. Good oils resistance		 -30°C
+100°C		 Good resistance to oils, mineral animal fats and
aliphatic hydrocarbons
ECO Polyepichlorohydrin Good flame resistance. Good mechanical properties
Good elastic characteristics at low and high temperatures
Excellent air and gas impermeability. Very good ozone resistance		 -40°C
+135°C		 Good resistance to oils, mineral, animal
and vegetable fats and glycols
VMQ Polymethyl-vinyl-siloxanes Very good heat resistance
Very good elastic characteristics at very low temperatures
Non toxic in contact with food stuff
Very good electric insulation characteristics		 -40°C
+200°C		 Good saline solutions and water resistance up to 100°C,
good weathering resistance, ozone, mineral, animal and
vegetable fats, alcohols and glycols resistance
PVMQ Polymethyl-phenyl-vinyl-siloxanes Excellent elastic characteristics at very low temperatures -90°C
+200°C		 Same chemical resistance as VMQ
FVMQ Polytrifluormethyl-vinyl-siloxanes Very good chemical resistance
Very good mechanical properties at low and high temperatures
High resistance to permanent deformation		 -55°C
+200°C		 Good resistance to oils from -60° to 200°C,
good chemical resistance to several fluids,
very good resistance to oils, fuels and solvents
FPM/FKM Co-ter-tetra fluorocarbon polymer
TFE+VDF+HFP+PFVE		 Excellent thermal and chemical resistance to oils and solvents
Very high resistance to permanent deformation		 -40°C
+250°C		 Very good resistance in oils, mineral, animal and
vegetable fats,aromatic, aliphatic, chlorinated solvents
and fuels
FFKM Copolymer tetrafluoroethylen
perfluoroalkil vinyl ether
TFE+PFVE		 Excellent chemical inertia
Utilization in extreme conditions
Very good heat resistance up to 320°C		 -15°C
+315°C		 Excellent chemical resistance practically inert,
able to withstand temperature peak of 350°C
only for limited time


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