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:
MDL number:
UNSPSC Code:
12162002
PubChem Substance ID:
NACRES:
NA.23
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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
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
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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
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Asp. Tox. 1 - Skin Irrit. 2
Storage Class Code
10 - Combustible liquids
WGK
WGK 1
Flash Point(F)
159.8 °F - closed cup
Flash Point(C)
71 °C - closed cup
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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Syutaro Yamamoto et al.
Journal of oleo science, 56(9), 463-469 (2007-09-28)
Water-soluble metal working fluids are used for processing of aluminum alloy materials. This short article describes properties of new additives in water-soluble metal working fluids for aluminum alloy materials. Many half esters or diesters were prepared from the reactions of
Lin Jia et al.
Macromolecular bioscience, 5(6), 526-538 (2005-06-11)
In situ self-assemblies of new biodegradable triblock PLLA-b-PBS-b-PLLA and PDLA-b-PBS-b-PDLA have been investigated in acetonitrile solution. At first, two series of PLLA-b-PBS-b-PLLA and PDLA-b-PBS-b-PDLA, respectively denoted as the P and Q triblock copolyester series, were prepared with fixed PBS block
Colin Booth et al.
Physical chemistry chemical physics : PCCP, 8(31), 3612-3622 (2006-08-03)
The article deals with the association behaviour in dilute aqueous solution of block copoly(oxyalkylene)s in which hydrophilic poly(ethylene oxide) is combined with hydrophobic poly(propylene oxide), poly(1,2-butylene oxide) or poly(styrene oxide). Polymers with three simple architectures are considered, i.e. copolymers of
Kazuo Masaki et al.
Applied and environmental microbiology, 71(11), 7548-7550 (2005-11-05)
A purified lipase from the yeast Cryptococcus sp. strain S-2 exhibited remote homology to proteins belonging to the cutinase family rather than to lipases. This enzyme could effectively degrade the high-molecular-weight compound polylactic acid, as well as other biodegradable plastics
X Y Wu et al.
The British journal of ophthalmology, 82(5), 569-576 (1998-08-26)
The goal was to compare the biological response of the corneal stroma with three porous materials: a melt blown microfibre web of polybutylene:polypropylene (80:20); a polyester spun laced fabric (polyethylene terephthalate), and an expanded polytetrafluoroethylene. Fifty per cent of each
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