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Liquid Isoprene Rubber
LIR
- LIR is a viscous liquid rubber based on
isoprene
- LIR is colorless,
transparent and almost completely odorless
- LIR has a function as a "Plasticizer",
LIR is the rubber with the highest molecular weight among materials
which have the plasticizing function
- In terms of function as a "Reactive",
it is "vulcanizable"
- LIR is co-vulcanizable with solid rubber
such as NR, SBR, BR and EPDM using sulfur or peroxide
- LIR is crosslinkable by reaction of its
functional groups using metal compounds, epoxy compounds, isocyanate
compounds, amine compounds and is crosslinkable by UV radiation
Applications of LIR
When functioning as a "reactive plasticizer"
and as a "crosslinkable", LIR can be applied to the following
applications.
- Rubber goods
Tire, Roll, Belt, Hose, Footwear
- Adhesives
Solution, Hot melt, Crosslink, Latex
- Sealants
Automobile, Construction
- Polyurethane
Potting materials, Coatings, Foam
- Others
Asphalt modifiers, Lubricants, Binders
| Typical
Properties |
| Type |
Standard |
Copolymer |
Hydrogenated |
Carboxylated |
| Grade |
LIR
30
LIR-50 |
LIR-310
(Styrene/isoprene)
LIR-390
(Butadiene/Isoprene) |
LIR-290 |
LIR-403
LIR-410 |
| Structure |
*1 |
*2 |
*3 |
*4 |
| Number
of functionality in a molecule |
--
-- |
--
-- |
--
(Iodine value = 40g/100g) |
3
10 |
| Molecular
Weight |
29,000
47,000 |
30,000
30,000 |
25,000 |
25,000
25,000 |
| Melt
viscosity at 38°C (poise) |
740
4,800 |
9,500
3,000 |
10,000 |
980
1,800 |
| Specific
Gravity (g/cc) |
0.91
0.91 |
0.92
0.88 |
0.86 |
0.92
0.92 |
| Glass
Transition Temp (°C) |
-63
-63 |
-63
-95 |
-59 |
-60
-59 |
| Features |
•
Good compatibility
with NR and IR.
• Well-balanced
adhesive
properties. |
•
Good compatibility
with thermoplastic
elastomers.
• Superior in heat resistance and
migration to other
plasticizers.
• Superior in heat
resistance to other
liquid rubbers. |
•
90% of Isoprene
units are
hydrogentated.
• Good compatibility with the less
unsaturated
rubber, for
instance EPDM
or IIR.
• Superior in heat
and weather
resistance.
|
•
Crosslinkable by
metal compounds,
epoxy compounds,
isocyanate
compounds, amine
compounds.
• Good adhesion
with metals and
fibers. |
| Main
applications |
•
Reactive plasticizer
(NR, IR, SBR, BR) -
Tire, Roll, Belt,
Hose, Footwear
• Pressure sensitive
adhesives (NR, IR,
SBR, SIS, SBS)
• Hot Melt adhesives
(SIS, EVA)
• Sealants |
•
Hot melt adhesives
(SIS, SBS, EVA)
• Sealants
(automobile) |
•
Reactive plasticizer
(EPDM, IIR)
• Hot melt adhesives
(SIS, SBS, SEBS,
SEPS, EVA) |
•
Modifier of
adhesion between
rubber and metal,
fabric. -belts,
hose, footwear .
• Pressure sensitive
adhesives
(Crosslink Type)
• Sealants
(automobile)
|
|
| Type |
Hydroxylated |
Methacrylated |
OH-terminated |
Latex |
| Grade |
LIR-506 |
*UC-1 |
*TL-20
*TH-21 (Hydrogenated) |
LIR-700 |
| Structure |
*5 |
*6 |
*7 |
*8 |
| Number
of functionality in a molecule |
5.9 |
3 |
3.5
2.9 |
--- |
| Molecular
Weight |
25,000 |
25,000 |
3,200
3,200 |
29,000 |
| Melt
viscosity at 38 C (poise) |
1,300 |
1,290 |
200
(30°C)
1,300 (30°C) |
75
(Solid content = 60wt%) |
| Specific
Gravity (g/cc) |
0.92 |
0.90 |
0.92
0.86 |
--- |
| Glass
Transition Temp (°C) |
-60 |
-60 |
-50
-45 |
-63 |
| Features |
•
curable by
Isocyanate
compounds. |
•
Reactive at low
temperature.
• Non-solvent
|
•
Resistance to
hydrolysis,
electrical
properties.
• Good durability
and heat
resistance.
(TH-21) |
•
Good compatibility
with NR latex |
| Main
applications |
•
Polyurethane
• Pressure sensitive
adhesives
(Crosslink Type) |
•
Pressure sensitive
adhesives
(UV curable Type) |
•
Polyurethane
• Pressure sensitive
adhesives
(Crosslink Type)
• Potting materials |
•
Reactive plasticizer
(NR latex, SBR
latex)
• Pressure sensitive
adhesives
(NR latex, SBR
latex, Acrylic latex) |
| *
Under developing grade |
|
| MSDS |
| Product
Name |
Legal
Status |
Safety
Information |
| USA
|
EU |
Ames |
LD
50 (mg/kg) |
| TSCA
|
CAS
No. |
EINECS |
| LIR-30 |
9003-31-0 |
|
ip;201-143-3 |
(-) |
>2,000 |
| Lir-50 |
9003-31-0 |
|
IP;201-143-3 |
|
|
| LIR-403 |
139948-75-7 |
|
IP;201-143-3 |
|
|
| LIR-410 |
128000-08-8 |
|
IP;201-143-3
MAn;203-571-6 |
(-) |
>2,000 |
| LIR-290 |
Y-93-97 |
9003-31-0 |
IP;201-143 |
(-) |
>2,000 |
| LIR-390 |
25102-52-7 |
|
IP;201-143
BD;203-450-8 |
(-) |
>2,000 |
| LIR-310 |
25038-32-8 |
|
IP;201-143-3
ST;202-851-5 |
|
|
| LIR-506 |
* |
* |
|
|
|
| LIR-700 |
9003-31-0 |
|
IP;201-143-3 |
|
|
| UC-1 |
139948-75-7 |
|
LIR-403+
HEMA;212-782-2 |
|
|
| TL-20 |
9003-31-0 |
|
IP;201-143
3H2O2;231-865-0 |
(-) |
>2,000 |
| TH-21 |
146177-82-4 |
|
IP;201-143-3
H2O2231-865-0
H2;215-605-7 |
|
|
|
*Application
submitted to TSCA
|
|
| Handling
Information |
| Available
in both cans and film pouches. Film pouches are preferred
when dealing with a viscous polymer. |
| Can
Style |
| Drum |
150kg |
| 5 gallon can |
15kg |
| Pouches* |
| Weight
of One Pack |
Number
of Packs in One Carton |
Weight
of One Carton |
| 2kg |
8 packs |
16kg |
| 3kg |
5 packs |
15kg |
| 4kg |
4 packs |
16kg |
| 5kg |
3 packs |
15kg |
*1,2- polybutadiene
film / melting point: 80°C
Polyethylene film / melting point: 110°C |
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