Dibutyl maleate

CAS Number
105-76-0
EC Number
203-328-4
Abbreviation
DBM

What is Dibutyl maleate?

Dibutyl maleate (CAS 105-76-0), commonly abbreviated as DBM, is a reactive diester monomer used in polymer chemistry and surface coating formulations. Also marketed as Staflex DBM and RC Comonomer DBM.

Where is Dibutyl maleate used?

  • Acrylic and vinyl polymer production: comonomer that modifies flexibility, adhesion and film-forming properties in emulsion polymerization
  • Printing inks and packaging coatings: improves substrate adhesion and controls mechanical properties of the cured film
  • PVC and synthetic rubber compounding: reactive plasticizer that bonds into the polymer matrix
  • Personal care: emollient ester component in skin-conditioning systems
  • It functions primarily as a reactive plasticizer and copolymerizable building block in resin systems.

Good to know: Bonding into the polymer matrix prevents migration out over time, an advantage for long-life flexible articles.

Commercial specifications

  • Technical grade, purity typically 99% or above
  • Standard industrial packaging including drums and IBCs
  • Bulk quantities and smaller pack sizes for laboratory and formulation development

Other Names (Synonyms)

Staflex DBM|Butyl maleate|RC Comonomer DBM|Maleic acid, dibutyl ester|2-Butenedioic acid (Z)-, dibutyl ester|2-Butenedioic acid (2Z)-, dibutyl ester|4X371TMK9K|2-Butenedioic acid (2Z)-, 1,4-dibutyl ester|DBM

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What are the physical properties of Dibutyl maleate?

Melting Point -85 °C
Boiling Point 140-145 °C @ Press: 2-3 Torr
Density 0.9900 g/cm³ @ Temp: 20 °C; Press: 759.8 Torr
Flash Point >230 °F
Appearance CLEAR COLOURLESS TO SLIGHTLY YELLOWISH LIQUID
Color Clear colorless to light yellow
Form Liquid
Water Solubility insoluble
Vapor Pressure 0.0027 hPa (20 °C)
Refractive Index n 20/D 1.445(lit.)
Log P 3.39 at 25℃

How is Dibutyl maleate classified and handled safely? Learn More

Warning
GHS07· Irritant GHS08· Health Hazard

Hazard Statements

H315 Causes skin irritation
H317 May cause an allergic skin reaction
H319 Causes serious eye irritation
H335 May cause respiratory irritation
H373 May causes damage to organs through prolonged or repeated exposure
H402 Harmful to aquatic life

Precautionary Statements

P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P271 Use only outdoors or in a well-ventilated area.

Which trade and regulatory codes apply to Dibutyl maleate?

HS Code 29171990
Storage Class 10 - Combustible liquids
WGK (Germany) 1
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