9003-27-4

Basic information

• Product Name: POLYISOBUTYLENE
• Synonyms: 1-Propene,2-methyl-,homopolymer;2-methyl-1-propenhomopolymer;2-methylpropenepolymer;2-methyl-propenpolymers;amoco600;hyvis200;kp5;maxvis2000
• CAS NO: 9003-27-4
• Molecular Weight: 56.10632
• EINECS: 204-066-3
• Product Categories: Polymers;Butene and Higher Organic Electronics and Photonics;Dielectric Materials;Hydrophobic Polymers;Olefins;Organic Conductors and Photovoltaics: OFET and OPV Materials;Butene and Higher;Poly(isobutylene);Alphabetic;Organic Soluble Polymers;P;POLB - POLYPolymer Standards;Butene and Higher;Dielectric Materials;Hydrophobic Polymers;Materials Science;Organic and Printed Electronics;Organic Field Effect Transistor (OFET) Materials;Polymer Science
• Mol File: 9003-27-4.mol

Chemical Properties

• Melting Point: 54-56 °C
• Boiling Point: 300 °C
• Appearance: /slab/chunk
• Density: 0.92 g/mL at 25 °C(lit.)
• Refractive Index: n20/D 1.51
• Stability: Stability Combustible. Incompatible with strong oxidizing agents.
• CAS DataBase Reference: POLYISOBUTYLENE(CAS DataBase Reference)
• NIST Chemistry Reference: POLYISOBUTYLENE(9003-27-4)
• EPA Substance Registry System: POLYISOBUTYLENE(9003-27-4)

Safety Data

• Safety Statements: 24/25
• WGK Germany: 3
• RTECS: UD1010000
• Hazardous Substances Data: 9003-27-4(Hazardous Substances Data)

Usage

Uses

Used in Tire Industry:
Polyisobutylene is used as an inner tube material for its gas impermeable properties, ensuring that air is retained within the tire for longer periods.
Used in Ball Sports Equipment:
Polyisobutylene is used as an inner liner in basketballs due to its ability to hold air, providing consistent performance and durability.
Used in Adhesives:
Polyisobutylene is used as an adhesive component, taking advantage of its tackiness and compatibility with various substrates.
Used in Fabric and Paper Coatings:
Polyisobutylene is used as a coating material for fabrics and paper, providing protection and enhancing the properties of the coated materials.
Used in Polymer Blends:
Polyisobutylene is used in blends with other polymers to modify their properties, such as improving adhesion or altering the rheology of the blend.
Used in Caulking Compounds:
Low molecular weight polyisobutylene is used in caulking compounds, providing a flexible and durable sealant for various applications.
Used in Chemical Industry:
Polyisobutylene is used as a high-consistency semi-solid polymer in the chemical industry, offering a transparent, non-noxious, and stable material for various applications.

Preparation

Silicone rubbers are prepared as follows: Other groups may replace the methyl groups. Silicone rubbers have excellent ozone and weathering resistance, good electrical properties, and good adhesion to metal.

Synthetic route

isobutene (115-11-7) → polyisobutene

Conditions	Yield
With 1,4-bis(o-chloroisopropyl)benzene; triethoxyphenylsilane; titanium tetrachloride In hexane; dichloromethane; isopropyl alcohol at -78 - 20℃; for 2h;
With cumenyl chloride; titanium tetrachloride In hexane; dichloromethane at -78 - 50℃; for 0.583333h; Cooling with acetone-dry ice;
With pyridine; α,α,α',α'-tetramethyl-1,4-benzene dimethylchloride; titanium tetrachloride In hexane; dichloromethane at -68℃; for 2h;

isobutene (115-11-7) → polyisobutene

Conditions	Yield
With 1,4-bis(o-chloroisopropyl)benzene; triethoxyphenylsilane; titanium tetrachloride In hexane; dichloromethane; isopropyl alcohol at -78 - 20℃; for 2h;
With cumenyl chloride; titanium tetrachloride In hexane; dichloromethane at -78 - 50℃; for 0.583333h; Cooling with acetone-dry ice;
With pyridine; α,α,α',α'-tetramethyl-1,4-benzene dimethylchloride; titanium tetrachloride In hexane; dichloromethane at -68℃; for 2h;

polyisobutene + diphenylamine (122-39-4) → Mussel Adhesive Protein

Conditions	Yield
Engelhard F-24 at 135 - 170℃; under 760.051 Torr; for 1.5 - 24h;
Engelhard F-24 sulphuric acid activated catalyst at 165 - 200℃; under 2585.81 Torr; for 0.5 - 24h;

Upstream product

• 115-11-7 isobutene 

Relevant articles and documents

Use Of Polyisobutenyl Succinic Anhydride-Based Block Copolymers In Cosmetic Preparations

The invention relates to novel cosmetic preparations comprising an O/W emulsion, where the O/W emulsion comprises at least one amphiphilic polymer comprising one or more hydrophobic units A and one or more hydrophilic units B, where the hydrophobic units A are formed from polyisobutenes modified with terminal, polar groups, at least one component with an HLB value in the range from 8 to 20, and at least one oil and/or fat phase and water.

SUBSTITUTED CYCLOALKANES, AND USE THEREOF AS CATIONIC POLYMERIZATION INITIATORS

Disclosed are substituted 7-membered to 12-membered cycloalkanes comprising terminal groups, especially chloride atoms, on tertiary ring carbon atoms, a method for the production thereof, and the use thereof as cationic polymerization initiators, particularly for cationically polymerizing isobutene. Preferred compounds are 1,4-dichloro-1,4-dimethylcyclooctane, 1,5-dichloro-1,5-dimethylcyclooctane, and mixtures thereof. Said compounds are produced by adding hydrocarbon to adequately substituted cycloalkapolyenes.

Method for producing polyisobutenes

Polyisobutenes in which at least 60 mol % of the polymer chains have at least one olefinically unsaturated terminal group are prepared by cationic polymerization of isobutene or isobutene-containing monomer mixtures in the condensed phase by a process in which the polymerization is carried out in the presence of an initiator system comprising i) a Lewis acid selected from covalent metal chlorides and semimetal chlorides and ii) at least one organic compound I having at least one functional group FG which forms a carbocation or a cationic complex with the Lewis acid under the polymerization conditions, where FG is selected from acyloxy, alkoxy and halogen, which are bonded to a secondary or tertiary carbon atom or to an allylic or a benzylic carbon atom, in a solvent inert toward the Lewis acid, the Lewis acid being used in less than the stoichiometric amount, based on the functional groups FG.