388726
Polybutenes
average Mn ~2,300 by VPO, isobutylene >90 %
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About This Item
Linear Formula:
[-CH2C(CH3)2-]x[-CH2CH(C2H5)-]y
CAS Number:
NACRES:
NA.23
PubChem Substance ID:
UNSPSC Code:
12162002
MDL number:
InChI
1S/2C4H8/c2*1-3-4-2/h3-4H,1-2H3;3H,1,4H2,2H3/b4-3+;
SMILES string
CCC=C.C\C=C\C
InChI key
WTOOLIQYCQJDBG-BJILWQEISA-N
form
liquid
mol wt
average Mn ~2,300 by VPO
composition
isobutylene, >90%
refractive index
n20/D 1.504
viscosity
4,000-4,400 cSt(99 °C)(lit.)
transition temp
Tg −64.9 °C, pour point (ASTM D 97) +18 °C
density
0.908 g/mL at 25 °C
Quality Level
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Application
Hydrophobic material is derivatized to make detergents and anti-rust additives. Adds tack, flexibility and water repellency to adhesives and coatings. Contributes ′cling′ to LLDPE films. Plasticizer for polymers, lubricants and metal-working fluids.
Features and Benefits
Tackiness increases with molecular weight. Some internal double bonds may be present.
Physical form
Terminal vinyl group.
Other Notes
remainder 1- and 2-butenes
signalword
Danger
hcodes
Hazard Classifications
Asp. Tox. 1 - Skin Irrit. 2
Storage Class
10 - Combustible liquids
wgk
WGK 1
flash_point_f
159.8 °F - closed cup
flash_point_c
71 °C - closed cup
ppe
Eyeshields, Gloves
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