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Isobutyl Isobutyrate (IBIB)
Aug 26, 2016

Isobutyl Isobutyrate (IBIB)

Low weight/gallon

IBIB has one of the lowest weight/gallon (7.13 pounds) of any ester solvent available. EPA guidelines limit the

maximum weight of a solvent for a given volume of coating; therefore, solvents with lower density contribute

to lower VOC.

Exempt under SARA III, Section 313, and HAPs regulations

In the Untied States, Xylene emissions are reportable under SARA, Title III, Section 313 (TRI list), and Title III of

the Clean Air Act Amendments of 1990 (HAPs). A blend of IBIB and VM&P ™ naphtha (56.4/43.6 weight) is an effective

xylene replacement in many coating formulations. Isobutyl acetate should be substituted for some or all of the

VM&P ™ naphtha when the aliphatic hydrocarbon tolerance of the coating is low or when additional solvent activity

is needed.

However, in electrostatically applied coatings, where xylene is used to adjust electrical resistance, a 60/20/20

blend of IBIB, isobutyl acetate, and VM&P ™ naphtha or an 80/20 blend of n-butyl acetate and IBIB may be more

effective as replacements.

Low water miscibility

With low water miscibility, IBIB is an excellent retarder solvent for moisture-sensitive coatings such as

polyurethanes. However, if a slower retarder solvent is required for a polyurethane coating, Eastman EEP

solvent affords an improved balance of properties while maintaining low moisture sensitivity.

Low surface tension

High-solids coatings tend to have higher surface tension than low-solids coatings. High surface tension can be a

contributing factor to poor coating atomization, poor wetting of the substrate, or film defects such as craters,

fish eyes, and edge pull. One way to reduce the surface tension of a high-solids coating is to use a low-surface-

tension solvent such as IBIB.

High resistivity

IBIB has high electrical resistance, which is helpful in adjusting the resistivity of a coating applied

electrostatically. Generally, alcohols and ketones (low resistivity) are used in high-solids coatings to maintain

package stability and lower viscosity. The addition of IBIB to high-solids coatings should enable formulators to adjust

electrical resistance without sacrificing package stability

and/or application viscosity.

Low solvent crazing of plastics

In coatings for plastic substrates, many retarder solvents with high activity have a tendency to craze the plastic

surface and lower its impact strength. Because of its balance of evaporation rate and good solvent activity,

IBIB is useful as a retarder solvent in coatings for plastic substrates that are sensitive to solvent attack.

If you want to purchase PA of for more information , pls contact Alex ( alex@gpcchem.com ) .