BASE ELAS­TO­MERS

ACM

Poly­acry­la­te rub­ber

ACM are co-poly­mers pro­du­ced from dif­fe­rent acry­lic esters with mono­mers necessa­ry for curing. Low elasti­ci­ty and poor cold fle­xi­bi­li­ty, unsui­ta­ble for elec­tri­cal app­li­ca­ti­ons. Dif­fi­cult to pro­cess.

Che­mi­cal resis­tan­ce:

  • Mine­ral oils (motor and gear oils, ATF oils), up to 150°C
  • Oxy­gen, ozone and gene­ral wea­the­ring
  • Low gas per­mea­bi­li­ty

Non-resistant:

  • Gly­col-based bra­ke fluids
  • Aro­ma­tics and chlo­ri­na­ted hydro­car­bons
  • Acids, alka­lis and ami­nes
  • Hot water and steam

CR

Chloro­bu­ta­di­e­ne rub­ber

Syn­the­tic rub­ber, gene­ral­ly metal oxi­de cured. Is self-extin­guis­hing, high alter­na­te ben­ding strength, medi­um oil resis­tan­ce.
Good mecha­ni­cal pro­per­ties and elasti­ci­ty. Low com­pres­si­on set.

Che­mi­cal resis­tan­ce:

  • Par­af­fin based mine­ral oils (e.g. ASTM oil No. 1)
  • Water and aque­ous solu­ti­ons (at medi­um tem­pe­ra­tures)
  • Ref­ri­ger­ants (ammo­nia, car­bon dioxi­de, fri­gen, fre­on, chlo­ri­ne, R12, R13, R21, R113, R114, R115)
  • Sili­co­ne based oils and grea­ses
  • Good resis­tan­ce to heat
  • Ozone, age­ing, gene­ral wea­the­ring

Non-resistant:

  • Aro­ma­tic hydro­car­bons
  • Chlo­ri­na­ted hydro­car­bons
  • Polar sol­vents (keto­nes, ethers, ace­to­ne)

EPDM

Ethy­le­ne-pro­py­len­e­die­ne rub­ber

Syn­the­tic rub­bers, per­oxi­de or sul­fur cured.
Low britt­leness tem­pe­ra­tu­re, flamm­a­ble.

Che­mi­cal resis­tan­ce:

  • Hot water, steam, con­den­sa­te
  • Gly­col-based bra­ke fluids
  • Anti-free­zes (wit­hout oil addi­ti­ve)
  • Hydrau­lic fluids based on aque­ous poly­mer solu­ti­ons and phos­pha­te esters
  • Many orga­nic and inor­ga­nic acids
  • Deter­gents and clea­ners, sodi­um and pot­as­si­um alka­lis
  • Phos­pha­te ester based hydrau­lic fluids (HFD‑R)
  • Sili­co­ne oils and grea­ses
  • Many polar sol­vents (alco­hols, keto­nes, esters)
  • Sky­drol 500 and 7000
  • Ozone, gene­ral wea­the­ring and age­ing (black com­pounds only)

Non-resistant:

  • Mine­ral oil pro­duc­ts (oils, grea­ses, fuels, emul­si­ons)
  • Tri­gly­ce­ri­des

EU

Poly­e­ther ure­tha­ne

Very high resis­tan­ce to tear and abra­si­on and notch strength, high elasti­ci­ty even on hard end pro­duc­ts, per­ma­nent defor­ma­ti­on at hig­her tem­pe­ra­tures, flamm­a­ble.

Che­mi­cal resis­tan­ce:

  • Mine­ral oils and grea­ses (addi­ti­ves can attack the mate­ri­al)
  • Mine­ral oil based lub­ri­cants
  • Sili­co­ne based oils and grea­ses
  • Water up to 50°C
  • Ozone and age­ing

Non-resistant:

  • Keto­nes, esters, ethers, alco­hols and gly­cols
  • Hot water, steam
  • Alka­lis, ami­nes and acids

FFKM

Per­fluo­ri­na­ted rub­ber

Out­stan­ding resis­tan­ce to extre­me­ly aggres­si­ve che­mi­cals, high tem­pe­ra­tu­re resistant, steam resistant.

Che­mi­cal resis­tan­ce:

  • Simi­lar to PTFE
  • Ali­pha­tic and aro­ma­tic hydro­car­bons
  • Chlo­ri­na­ted hydro­car­bons
  • Polar sol­vents (e.g. ace­to­ne, methyl ethyl keto­ne, ethyl ace­ta­te and dio­xa­ne)
  • Inor­ga­nic and orga­nic acids
  • Water, steam
  • High vacu­um: Very low loss in weight

Non-resistant:

  • Com­pounds con­tai­ning fluo­ri­ne (e.g. ref­ri­ger­ants R11, 12, 13, 113, 114 etc.)

FKM

Fluo­ri­na­ted rub­ber

Excel­lent oil and che­mi­cal resis­tan­ce, out­stan­ding resis­tan­ce at very high tem­pe­ra­tures, very good ozone resis­tan­ce, medi­um mecha­ni­cal strength. Accep­ta­ble volu­me swell in aro­ma­tics. Does not sustain com­bus­ti­on.

Che­mi­cal resis­tan­ce:

  • Mine­ral oils and grea­ses
  • Low swel­ling in ASTM oil Nos. 1 to 3
  • Phos­pha­te ester based hydrau­lic fluids
  • Fire-resistant hydrau­lic fluids in HFD group
  • Sili­co­ne oils and grea­ses
  • Vege­ta­ble and ani­mal oils and fats
  • Ali­pha­tic hydro­car­bons (petrol, buta­ne, pro­pa­ne and natu­ral gas)
  • Aro­ma­tic hydro­car­bons (ben­ze­ne, tolue­ne)
  • Chlo­ri­na­ted hydro­car­bons (tri­chlo­roethy­le­ne, car­bon tetra­chlo­ri­de)
  • Fuels (pre­mi­um gra­de fuels, die­sel fuel and fuel oil) and fuels con­tai­ning metha­nol
  • Con­cen­tra­ted inor­ga­nic and orga­nic acids and alka­lis
  • High vacu­um
  • Ozone, gene­ral wea­the­ring and age­ing

Non-resistant:

  • Polar sol­vents (ace­to­ne, methyl ethyl keto­ne, ethyl ace­ta­te, dio­xa­ne)
  • Sky­drol 500 and 7000 …
  • Gly­col based bra­ke fluids
  • Ammo­nia gas, ami­nes, alka­lis
  • Super­hea­ted steam
  • Low mole­cu­lar weight orga­nic acids (for­mic and ace­tic acid)

FVMQ

Fluo­ro­si­li­co­ne rub­ber

Syn­the­tic rub­ber cross-lin­ked by per­oxi­de. Good elec­tri­cal insu­la­ting pro­per­ties. Its phy­si­cal pro­per­ties are main­tai­ned over a wide tem­pe­ra­tu­re ran­ge. Medi­um mecha­ni­cal strength. Notch sen­si­ti­ve. Excel­lent high and low tem­pe­ra­tu­re resis­tan­ce in dry heat. Good oil and fuel resis­tan­ce, flamm­a­ble.

Che­mi­cal resis­tan­ce:

  • Ali­pha­tic motor and gear oils (e.g. ASTM oil No. 1)
  • Aro­ma­tic mine­ral oils (ASTM oil No. 3)
  • Fuels
  • Aro­ma­tic hydro­car­bons (ben­ze­ne, tolue­ne)
  • Ani­mal and vege­ta­ble oils and fats
  • Gly­col based bra­ke fluids
  • Fire-resistant hydrau­lic fluids HFD‑R and HFD‑S
  • High mole­cu­lar weight chlo­ri­na­ted aro­ma­tic hydro­car­bons (chlo­ro­di­phe­nyl; coo­l­ants for trans­for­mers)
  • Water up to 100°C
  • Dilu­te salt solu­ti­ons
  • Ozone, gene­ral wea­the­ring and age­ing

Non-resistant:

  • Super­hea­ted steam (> 120°C)
  • Acids and alka­lis
  • Sili­co­ne oils and grea­ses
  • Low mole­cu­lar weight chlo­ri­na­ted hydro­car­bons (tri­chlo­roethy­le­ne)

HNBR

Hydro­gena­ted acry­lo­ni­tri­le buta­di­e­ne rub­ber

Syn­the­tic elas­to­mer pro­du­ced by cata­ly­tic hydro­ge­na­ti­on from NBR, per­oxi­de cured. Excel­lent phy­si­cal pro­per­ties, even at high tem­pe­ra­tures. Very good abra­si­on resis­tan­ce. Low com­pres­si­on set, very good hot air resis­tan­ce, low vapour and gas per­mea­bi­li­ty. Flamm­a­ble.

Che­mi­cal resis­tan­ce:

  • Ali­pha­tic hydro­car­bons
  • Vege­ta­ble and ani­mal oils and fats
  • HFA, HFB and HFC fluids
  • Many dilu­te acids, bases and salt solu­ti­ons at low tem­pe­ra­tures
  • Water and steam up to 150°C
  • Ozone, gene­ral wea­the­ring and age­ing

Non-resistant:

  • Chlo­ri­na­ted hydro­car­bons
  • Polar sol­vents (e.g. keto­nes and esters)
  • Strong acids

NBR

Acry­lo­ni­tri­le-buta­di­e­ne rub­ber

Syn­the­tic elas­to­mer, sul­fur cured. Good mecha­ni­cal strength, low per­ma­nent defor­ma­ti­on under pres­su­re. Good age­ing pro­per­ties and low abra­si­on. Short elon­ga­ti­on. Flamm­a­ble.

Che­mi­cal resis­tan­ce:

  • Mine­ral oil based lub­ri­cants and hydrau­lic fluids inclu­ding their aque­ous emul­si­ons
  • Ali­pha­tic hydro­car­bons (pro­pa­ne, buta­ne, petrol, mine­ral oils and grea­ses, die­sel fuel, fuel oil)
  • Vege­ta­ble and ani­mal oils and fats
  • HFA, HFB and HFC fluids
  • Many dilu­te acids, bases and salt solu­ti­ons at low tem­pe­ra­tures
  • Water up to 80°C

Non-resistant:

  • Fuels with a high aro­ma­tic con­tent (e.g. pre­mi­um gra­de fuel)
  • Aro­ma­tic hydro­car­bons (ben­ze­ne)
  • Chlo­ri­na­ted hydro­car­bons (tri­chlo­roethy­le­ne)
  • Polar sol­vents (keto­nes, ace­to­ne, ace­tic acid ethy­le­ne ester)
  • Strong acids
  • Gly­col based bra­ke fluids
  • Ozone, gene­ral wea­the­ring and age­ing)

VMQ

Sili­co­ne rub­ber

Syn­the­tic elas­to­mer, per­oxi­de cured. Good elec­tri­cal insu­la­ti­on pro­per­ties. The phy­si­cal pro­per­ties are retai­ned over a wide tem­pe­ra­tu­re ran­ge. Phy­sio­lo­gi­cal­ly neu­tral. Medi­um mecha­ni­cal strength. Notch sen­si­ti­ve. Sen­si­ti­ve to the effec­ts of hot water and steam. Very high heat and cold resis­tan­ce in dry heat, flamm­a­ble.

Che­mi­cal resis­tan­ce:

  • Ali­pha­tic motor and gear oils (e.g. ASTM oil No. 1)
  • Ani­mal and vege­ta­ble oils and fats
  • Gly­col based bra­ke fluids
  • Fire-resistant hydrau­lic fluids HFD‑R and HFD‑S
  • High mole­cu­lar weight chlo­ri­na­ted aro­ma­tic hydro­car­bons (Chlo­phen and chlo­ri­na­ted diphe­nyl (coo­l­ants for trans­for­mers)
  • Water up to 95°C
  • Dilu­te salt solu­ti­ons
  • Ozone, gene­ral wea­the­ring and age­ing

Non-resistant:

  • Super­hea­ted steam (> 120°C)
  • Acids and alka­lis
  • Sili­co­ne oils and grea­ses
  • Low mole­cu­lar weight chlo­ri­na­ted hydro­car­bons (tri­chlo­roethy­le­ne)
  • Aro­ma­tic mine­ral oils
  • Fuels
  • Aro­ma­tic hydro­car­bons (ben­ze­ne, tolue­ne)