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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%)