ENB
Technical Data Sheet
ENB or ethylidenenorbornene is a bicyclic monomer and intermediate that contains two double bonds, each with quite different reactivity. Thus, it is possible to react one of the double bonds, and retain the other double bond for subsequent reaction.
ENB is used predominantly as a diene monomer in the manufacture of EPDM (Ethylene-Propylene-Diene-monomer) rubber.
ENB is registered in chemical abstracts under bicyclo(2.2.1)hept-2-ene,5-ethylidene. The CAS registry number is 16219-75-3.
Its EINICS number is 240-347-7 and the MITI number is D 44 602.
ENB is not listed in the EEC Annex One, but is listed in the TSCA (USA), in the AICS/NICNAS and in the DSL/NDSL
Properties
Typical properties
Ethylidenenorbornene (ENB)
99.0 area %
Vinylnorbornene (VNB)
0.2 area %
C8/C9 compounds eluting between VNB and ENB
0.6 area %
Heavies
0.2 area %
t-Butylcatechol (inhibitor)
150 ppm
Water
30 ppm
Colour
30 platinum-cobalt
Suspended matter
Substantially free
These above typical values are subject to change without notice.
INEOS Oxide
Technical Data Sheet • Ethylidenenorbornene
IOX TDENB 2004.01
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ENB
Physical Properties
Properties have been determined on purified samples
Molecular weight
120.2
Apparent specific gravity (H2O=1)
0.896 at 20/20°C
∆ Spec. grav./∆t, 20-30°C
0.00083/°C
True density at 20°C
0.894 g/ml
Boiling point at
760 mm.Hg
147.6 °C
500 mm.Hg
132 °C
200 mm.Hg
103 °C
50 mm.Hg
67 °C
10 mm.Hg
35 °C
∆ b.p./∆p, 740-760 mm.Hg
0.050 °C/mm.Hg
Freezing point
-80 °C
Vapour pressure at 20 °C
4.2 mm.Hg
Antoine equation
logp = A - B/(C + t)
p = pressure in mm. Hg
A = 6.9464
t = temperature °C
B = 1453.7
C = 210
Absolute viscosity at
Refractive index,
n20
D
20 °C
1.1 cP
30 °C
0.9 cP
40 °C
0.8 cP
°C
1.4909
∆ nD/∆t, 20 - 30 °C
Solubility at 20 °C
0.00049/°C
in water
0.01 % by wt.
water in
0.05 % by wt.
Heat of vaporisation at 1 atm
Specific heat at
72 kcal/kg
25 °C
0.43 cal/g/°C
50 °C
0.45 cal/g/°C
Flash point, Tag open cup (ASTM method D1310)
37 °C *
Evaporation rate (butylacetate = 1)
0.38
Vapour density (air = 1)
4.1
% volatiles by volume
nil
Autoignition temperature
272 °C
Flammable limits in air, % by volume
lower
0.9 (calculated)
upper
6.0 (estimated)
* Determined on commercial material
INEOS Oxide
Technical Data Sheet • Ethylidenenorbornene
IOX TDENB 2004.01
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ENB
Packaging
ENB is supplied in either bulk road tankers, ISO-containers or 200 litre mild steel drums.
Storage
ENB is a colourless liquid, capable of being stored in mild steel or stainless steel at atmospheric conditions. It may not be
stored in copper or its alloys and polyethylene. Use only PTFE or viton for gaskets and seals. Store under a nitrogen blanket
to prevent contact with oxygen. Storage vessels and transfer equipment should be adequately earthed and bonded to prevent
the accumulation of static electricity. Store away from sources of heat or ignition.
The waste disposal method is to incinerate in a suitable furnace under appropriate Federal, State and local regulations.
Regulations
The following international classifications apply on transportation :
UN
ADR/RID
IMDG
IATA
Number
Proper Shipping Name
Flammable liquid, N.O.S. (Ethylidenenorbornene)
Class
3
Packaging group
III
Substance Identification Number
1993
Name
Ethylidenenorbornene
Class
3
Item no
31c
Hazard Identifcation Number
30
Proper Shipping Name
Flammable liquid, N.O.S. (Ethylidenenorbornene)
Packaging Group
III
Class
3.3
Ems Number
3-07
MFAG Table Number
310
Proper Shipping Name
Flammable liquid, N.O.S. (Ethylidenenorbornene)
Packaging Group
III
Class
3
Tremcard No. TEC(R)
INEOS Oxide
1993
Technical Data Sheet • Ethylidenenorbornene
753
IOX TDENB 2004.01
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ENB
Applications
The primary application of ethylidenenorbornene is in the manufacturing of EPDM rubber. The norbornene double bond
copolymerises with ethylene and propylene to produce an ethylene-propylene-terpolymer that contains the ethylidene double
bond as residual unsaturation. The ethylidene double bond is subsequently used to cure (vulcanise) the raw EPDM with
sulphur in conventional vulcanising equipment.
ENB is conventionally incorporated at levels up to 10% of the monomer formulation; increased ENB concentration
enhances cure rate of the EPDM.
ENB also finds application in the production of other polymers requiring residual unsaturation for subsequent curing.
ENB has a specific odour and consequently may be utilised in niche fragrance compounds.
Health and Safety
ENB is a mobile hydrocarbon fluid which is classified as “flammable” and “harmful” under SI 1984/1244 and the corresponding EEC legislation. The “harmful” classification arises from its inhalation toxicity. Users must take steps to avoid
inhalation of vapours and to avoid skin and eye contact.
There are no unusual fire or explosion hazards or special firefighting procedures. Hazardous polymerisation may occur in
some conditions. Contact with mineral acids and alkalis, oxygen and polymerisation catalysts should be avoided at all times.
A Material Safety Data Sheet has been issued describing the health, safety and environmental properties of this product,
identifying the potential hazards and giving advice on handling precautions and emergency procedures. This must be consulted
and fully understood before handling, storage or use of this product.
Exclusion of Liability
Information contained in this publication is accurate to the best of the knowledge and belief of INEOS.
Any information or advice obtained from INEOS otherwise than by means of this publication, is given in good faith.
However, it remains at all times the responsibility of the customer to ensure that INEOS materials are suitable for the purpose
for which they are intended by the customer.
lnsofar as materials not manufactured by INEOS are used in conjunction with or instead of INEOS materials, the customer
should ensure that he has received from the manufacturer or supplier all technical data and other information relating to
such materials.
INEOS accepts no liability whatsoever (except as otherwise provided by law) arising out of the use of information supplied,
the application, adaptation, or processing of the products described herein, the use of materials in lieu of INEOS materials
or the use of INEOS materials in conjunction with third party materials.
Further information is available from:
INEOS Oxide • Nieuwe Weg 1 • 2070 Zwijndrecht • BELGIUM • Tel: +32 3 250 9111 • Fax: +32 3 252 845
INEOS Oxide
Technical Data Sheet • Ethylidenenorbornene
IOX TDENB 2004.01
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