Diisobutyl phthalate

  • Phthalate
  • DIPB
  • 1,2- Benzoldicarbonsäurebis (2- methylpropyl ) ester

Colorless liquid with a faint odor

Liquid

1.04 g · cm -3

-64 ° C

327 ° C.

<1 Pa ( 20 ° C)

  • Insoluble in water (20 mg · l-1 at 20 ° C)
  • Soluble in most organic solvents or oils, miscible with other plasticizers and phthalic

1.49 at 20 ° C.

Risk

15,000 mg · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search available

Diisobutyl phthalate is an organic chemical compound consisting of the group of the phthalates is used mainly as plasticizers. It is a colorless liquid with a very faint odor.

Production and representation

The technical production of diisobutylphthalate is carried out in a two-step synthesis of phthalic anhydride, and isobutanol. The first step is a rapid alcoholysis to Phthalsäurehalbester. The second esterification proceeds as an equilibrium reaction and requires the use of slower, and acid catalysts for conversion completion, the distillative removal of the water formed.

Properties

Physical Properties

Diisobutyl phthalate has a viscosity of 40-43 mPa · s and its vapors are 9.59 times heavier than air.

Chemical Properties

Diisobutylphthalate is very stable to light and heat. It has a lower density compared to dibutyl phthalate, and melting point, but has similar properties, such that it can be used as a substitute for it.

Use

Diisobutyl phthalate is widely used. So it is

  • Odorless as plasticizers for plastics (PVC, polyvinyl acetate, polyvinyl butyral, cellulose acetate, cellulose nitrate, ethyl cellulose, polyurethane, acrylics, chlorinated rubber, and nitrile rubber ), and for paints and adhesives, water-based polyvinyl acetate
  • As additive ( with a content of 60 %) of a curing agent for unsaturated polyester resins Dibenzoylperoxidhaltigem
  • As marking additive ( mixed with nonyl phenols ) of fuel oils for tax purposes
  • For the preparation of titanium catalysts
  • As support material for odor
  • As an additive in hydraulic fluids and lubricants
  • Indirectly in the food industry as flexibilising component in printing inks for food packaging.
CAS registry number Vapor pressure Dangerous Substances Directive (67/548/EEC) Polyvinylbutyral Nitrocellulose Acryloyl group Digital Object Identifier
8915
de