Defence Rubber Standards
ISCA is a highly experienced rubber seal manufacture and supplier, supported by a team of experienced industrial chemists and expert manufacturing technicians. Supplying a wide variety of o-rings and seals to Defence Standards.
ISCA has over 25 years experience producing and sourcing rubber compounds, developing seals and rubber products to suit the most challenging applications and working environments.
TABLE 1- RUBBER GROUP ‘A’ (ISO 2230:2002)
Rubbers with moderate susceptibility to deterioration by aging.
|
ABBREVIATION |
CHEMICAL NAME |
COMMON NAME |
|
BR |
Butadiene Rubber |
Polybutadiene |
|
NR |
Isoprene Rubber, Natural |
Natural Rubber |
|
IR |
Isoprene Rubber, Synthetic |
Polyisoprene |
|
SBR |
Styrene-Butadiene Rubber |
SBR |
|
AU |
Polyester Urethane Rubber |
Polyurethane |
|
EU |
Polyether Urethane Rubber |
Polyurethane |
TABLE 2-RUBBER GROUP ‘B’ (ISO 2230:2002)
Rubbers with low susceptibility to deterioration by aging.
|
ABBREVIATION |
CHEMICAL NAME |
COMMON NAME |
|
ACM |
Copolymer Ethylacrylate |
Arcylic |
|
BIIR |
Bromo-Isobutene-Isoprene |
Bromobutyl |
|
CIIR |
Chloro-Isobutene-Isoprene |
Chlorobutyl |
|
CO, ECO |
Polychloromethyloxiran |
Epichlorohydrin |
|
CR |
Chloroprene Rubber |
Neoprene |
|
HNBR |
Hydrogenated NBR |
Hydrogenated Nitrile |
|
IIR |
Isobutene-Isoprene |
Butyl |
|
NBR |
Acrylonitrile-Butadiene |
Nitrile |
|
NBR/PVC |
Acrylonitrile-Butadiene & Poly |
Nitrile/PVC |
|
XNBR |
Carboxylic-Acrylonitrile-Butadiene |
Carboxylated Rubber |
TABLE 3- RUBBER GROUP ‘C’ (ISO 2230:2002)
Rubbers which are highly resistant to deterioration by aging.
|
ABBREVIATION |
CHEMICAL NAME |
COMMON NAME |
|
CM |
Chloropolyethylene |
Chlorinated Polyethylene |
|
CSM |
Chlorosulfonylpolyethylene |
Chlorosulfon Polyethylene |
|
EPDM |
Ethylene Propylene |
EPDM |
|
FKM |
Fluoro, Perfluoroalkyl |
Fluorocarbon (Viton®) |
|
MQ |
Silicone |
|
|
PVQ |
Silicone |
|
|
PVMQ |
Silicone |
|
|
Q |
Silicone |
|
|
VQM |
Silicone |
TABLE 4 - STORAGE PERIOD (ISO 2230:2002)
|
CLASSIFICATION |
INITIAL STORAGE PERIOD |
EXTENSION PERIOD |
|
Group ‘A’ |
5 Years |
2 Years |
|
Group ‘B’ |
7 Years |
3 Years |
|
Group ‘C’ |
10 years |
5 Years |
(Note i: British & American Standards classify Group ‘C’ above as Group ‘X’ & should be refered to, for additional information on shelf life see ARP5316B. BS3574
Note ii: Storage at a 10ºC higher than normal tempurature will reduce the storage time by about 50%)
