Description

Butene, Polymer With 2-Methyl-1-Propene CAS NO 9044-17-1 is a synthetic copolymer derived from butene and isobutylene (2-methyl-1-propene). This polymer is valued for its unique combination of flexibility, chemical resistance, and impermeability to gases. It is primarily utilized in the production of specialized elastomers, sealants, and as a key modifier in polymer blends for the automotive, construction, and packaging industries.

Application

• Elastomer and Rubber Manufacturing: A primary component in butyl rubber and other synthetic elastomers for inner tubes, seals, and vibration dampers.
• Adhesive and Sealant Formulations: Used as a tackifier and base polymer to enhance adhesion, flexibility, and moisture resistance.
• Polymer Modification: Acts as an impact modifier and compatibilizer in blends with polyolefins (e.g., PP, PE) to improve toughness and processability.
• Lubricant and Fuel Additives: Serves as a viscosity index improver and dispersant in high-performance lubricating oils and fuel systems.
• Packaging Films and Coatings: Imparts excellent barrier properties against moisture and gases in flexible packaging and protective coatings.
• Caulks and Insulating Materials: Provides durable, airtight seals in construction applications for windows, glazing, and insulation.
• Pharmaceutical Stoppers: Used in the formulation of specialty rubbers for medical closures and septa due to its purity and inertness.
• Wire and Cable Insulation: Enhances the dielectric properties and environmental resistance of insulating materials.

Basic Information

Product Name	Butene, Polymer With 2-Methyl-1-Propene
CAS No.	9044-17-1
Molecular Formula	(C4H8)x·(C4H8)y
Molecular Weight	Variable (Polymer)
Synonyms	Isobutylene-Butene Copolymer; Poly(isobutylene-co-butene); Butyl Rubber (low molecular weight grades); Isobutylene/Butene Copolymer; 2-Methyl-1-propene polymer with 1-butene; PIB-co-PB; Butene-isobutylene polymer; Low molecular weight butyl rubber
EINECS	Contact for details

Quality Control

Our Butene, Polymer With 2-Methyl-1-Propene is manufactured under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure consistent molecular weight distribution, viscosity, and compositional purity. Certificates of Analysis (COA) detailing key parameters are provided with every shipment. We adhere to relevant industry standards and can support compliance requirements for specific applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from heat sources, open flames, and strong oxidizing agents. For long-term storage, consider under an inert atmosphere to prevent oxidation.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid or solid
Identification (IR)	Conforms to structure
Assay (Monomer Composition)	Contact for details
Viscosity (Brookfield)	Grade-dependent (cP)
Molecular Weight (GPC)	Grade-dependent (Mn, Mw)
Volatile Matter	< 1.0%
Ash Content	< 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.