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:
form
liquid
Quality Level
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
SMILES string
CCC=C.C\C=C\C
InChI
1S/2C4H8/c2*1-3-4-2/h3-4H,1-2H3;3H,1,4H2,2H3/b4-3+;
InChI key
WTOOLIQYCQJDBG-BJILWQEISA-N
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
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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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Ibrahim Bulent Buttanri et al.
Ophthalmic plastic and reconstructive surgery, 29(2), 98-100 (2012-12-14)
To evaluate the effect of suturing the silicone rod to the tarsal plate and the suture material used in suturing on surgical success of frontalis suspension for congenital ptosis. Eighty eyes of 56 consecutive patients who underwent frontalis suspension surgery
Anders Höglund et al.
Macromolecular bioscience, 12(2), 260-268 (2011-11-19)
The pre-polymer poly(but-2-ene-1,4-diyl malonate) (PBM) and a series of PBM-based materials are shown to be degradable under physiological conditions in vitro and they are therefore presented as potential materials for biomedical applications. Four different PBM-based materials are synthesized: a PBM
Xi-xiao Yang et al.
Di 1 jun yi da xue xue bao = Academic journal of the first medical college of PLA, 25(10), 1261-1263 (2005-10-20)
To evaluate the biocompatibility of polybutylcyanoacrylate nanoparticles (PBCA-NP) manufactured by emulsion polymerization technique. MTT assay was performed for evaluation of the cytotoxicity of PBCA-NP (e.g. cell proliferation and hemolytic test) experiments of long-term subcutaneous implantation and implantation in the muscular