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Applications for iso-butanol (iba)
 
Description:
 iso-Butanol is a clear, mobile, neutral liquid. It is miscible with all common solvents, e.g. alcohols, ketones, aldehydes, ethers, glycols and aromatic and aliphatic hydrocarbons. Its miscibility with water, however, is limited.
 
Physical Properties:
 
Boiling Point (760 torr) 106~108℃
Solidification Point (760 torr) -108℃
Specific Gravity (20℃/20℃) 0.802
Flash Point 28℃
Ignition Temperature 380℃
 
Applications:
 
iso-Butanol 
 is used as a solvent and as a feedstock for syntheses.
A major part of the production of pure iso-butanol is convert into derivatives (primarily esters) which are used as solvents in the coatings industry.
The advantage here is that iso-butanol prevents blushing of certain coatings when they dry under humid conditions. Thus it widely used as a diluent in cellulose nitrate lacquers and serves to improve their flow, gloss and resistance to blushing (blushing only occurs in the presence of volatile solvents and high humidities). For this purpose addition rates of 5-10% are generally sufficient.
iso-Butanol is an eminently suitable solvent for acid-curable lacquers and baking finishes derived from urea (plastopal), melamine (Luwipal), or phenolic resins. Here it is mainly used together with glycol ethers, ethanol or aromatic hydrocarbons.
Even when added in small proportions to alkyd resin paints, isobuanol reduce their viscosity and thus improves their brushability and flow. Low concentrations of iso-butanol prevent cobwebbing in lacquers formulated from spirit-soluble resin and exert a beneficial effect in water bases paints.
Di-isobutylphthalate (DIBP) has gained importance amongst the isobutyl ester of dicarboxylic acids as a plasticizer for plastics, dispersion and rubber mixes. Other isobutyl esters of dicarboxylic acids, e.g. adipic, azelaic and sebacic acids, display good properties in this application. Economic considerations, however, preclude their use at present.
Other application for iso-butanol are as follows:
-Solvent for printing inks.
-Extractant in the production of drugs and natural substances such as antibiotics, hormones, vitamins, alkaloids and camphor.
-Additive in polishes and cleaners, e.g. floor cleaner and stain removers.
-Solubilizer in the textile industry, e.g. additive in spinning baths or carrier for colouring plastics.
-Additive in de-icing fluids.
-Additive in gasoline for spark-ignition engines (prevents carburetter icing).
-Mobile phase in paper and thin-layer chromatography.
-Humectant for cellulose nitrate.
-Dehydrating agent (entrainer in azeotropic distillation).
-Feedstock in the production of glycol ethers (in reactions with ethylene or propylene oxide).
-Feedstock in the production of isobutyl acrylate, which is used in dispersions.
-Feedstock in the production of flotation aid (e.g. isobutyl xanthate).
-Starting material in the production of wear inhibitors and anticorrosion additives in engine oils, e.g. zinc diisobutyl dithiophosphate.
The isobutyl esters of various dicarboxylic acids, e.g. sebacic, adipic and stearic acids, are used as synthetic and semisynthetic lubricants and hydraulic fluids
 
Storage and handling:
  iso-Butanol can be stored in tanks of normal carbon steel. In this case, however, steps must be taken to exclude moisture from the atmosphere, as otherwise the product quality may be impaired (increase in moisture content; and discoloration by rust in steel tanks). iso-butanol can corrode aluminum at temperature above 60℃. Consequently, it should never be stored, except at low temperatures, in tanks constructed from aluminum and its alloys.
If severe demands are imposed on the quality of the iso-butanol, we recommend that it be stored in stainless tanks.
Drums containing the product should be kept tightly closed in a well-ventilated place