9003-18-3

Basic information

• Product Name: ACRYLONITRILE/BUTADIENE COPOLYMER
• Synonyms: Acrylonitrile/Butadiene copolymer (33/67);POLY(ACRYLONITRILE-CO-BUTADIENE) 30-35&;POLY(ACRYLONITRILE-CO-BUTADIENE), 37-39 WT. % ACRYLONITRILE;POLY(ACRYLONITRILE-CO-BUTADIENE) 19-22&;Acrylonitrile-1,3-butadiene copolymer;CeMedine 540;Poly(acrylonitrile-co-butadiene) acrylonitrile 37-39 wt. %;ACRYLONITRILE/BUTADIENE COPOLYMER
• CAS NO: 9003-18-3
• Molecular Formula: C21H27N3X2
• Molecular Weight: 321.46
• EINECS: 231-675-1
• Product Categories: Polymers;Dienes;Hydrophobic Polymers;Polymer Science;Hydrophobic Polymers;Materials Science;Polymer Science
• Mol File: 9003-18-3.mol
• Article Data: 0

Chemical Properties

• Appearance: /slab/chunk
• Density: 1 g/mL at 25 °C
• CAS DataBase Reference: ACRYLONITRILE/BUTADIENE COPOLYMER(CAS DataBase Reference)
• NIST Chemistry Reference: ACRYLONITRILE/BUTADIENE COPOLYMER(9003-18-3)
• EPA Substance Registry System: ACRYLONITRILE/BUTADIENE COPOLYMER(9003-18-3)

Safety Data

• Statements: 36/37/38
• Safety Statements: 26-36
• WGK Germany: 3
• Hazardous Substances Data: 9003-18-3(Hazardous Substances Data)

Usage

Description

ACRYLONITRILE/BUTADIENE COPOLYMER, also known as Nitrile-Butadiene Rubber (NBR), is a synthetic rubber copolymer that combines the properties of acrylonitrile and butadiene. It is known for its high oil and temperature resistance, flexibility at low temperatures, and resistance to heat, abrasion, water, and gas permeation.

Uses

Used in Automotive Industry:
ACRYLONITRILE/BUTADIENE COPOLYMER is used as fuel lines, hoses, and automobile parts for its oil and temperature resistance, as well as its flexibility at low temperatures.
Used in Manufacturing Industry:
ACRYLONITRILE/BUTADIENE COPOLYMER is used as structural adhesives for its strong bonding properties and resistance to various environmental factors.
Used in Protective Clothing:
ACRYLONITRILE/BUTADIENE COPOLYMER is used as oil-resistant clothing, gloves, and shoe soles and heels for its resistance to oil, heat, and abrasion.
Used in Protective Equipment:
Gloves made of nitrile rubber are used as an alternative to neoprene gloves for their comparable resistance to organic solvents, particularly in applications involving II-hexane and phenol.
Chemical Properties:
ACRYLONITRILE/BUTADIENE COPOLYMER's flexibility at very low temperatures can be obtained with lower acrylonitrile content, although this may sacrifice some oil resistance. Low-temperature flexibility for some applications can be modified by plasticizers or blends. NBR is frequently plasticized with organic phosphate, phthalic ester, or dibenzyl ether to enhance its properties.

Production Methods

NBR is produced by polymerization of acrylonitrile and butadiene in varying proportions. The basic steps are the emulsion polymerization techniques used for styrene– butadiene. The process yields both “hot” and “cold” rubber. Hot rubbers are branched and contain some cross-linked gel. The more linear cold rubbers are slightly cross-linked by incorporating divinyl benzene to improve processability and compression set resistance.