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Sigma-Aldrich

Polybutenes

average Mn ~460 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:

mol wt

average Mn ~460 by VPO

composition

isobutylene, >90%

viscosity

210-227 cSt(38 °C)(lit.)

transition temp

Tg −69.6 °C
pour point (ASTM D 97) −35 °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

Pictograms

Health hazardExclamation mark

Signal Word

Danger

Hazard 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

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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An innovative type of triblock copolymer that maintains and even increases the mechanical properties of poly(l-lactide) (PLLA) and poly(ε-caprolactone) (PCL) with a controlled, predictable, and rapid degradation profile has been synthesized. Elastic triblock copolymers were formed from the hydrophobic and
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