Technical Data Sheet
Eastman™ n-Butyl Propionate
Applications
Architectural coatings
Auto OEM
Auto plastics
Auto refinish
Automotive
General industrial coatings
Marine
Paints & coatings
Wood coatings
Key Attributes
Good solvent activity
High electrical resistance
Low MIR value
Low surface tension
Low water solubility
Mild odor
Non-HAP
Non-SARA
REACH compliant
Readily biodegradable
Slow evaporation rate
Urethane grade
Product Description
Eastman™ n-Butyl Propionate is a non-HAP, slow evaporating, and urethane grade solvent with good solvent activity for most coating resins. In lacquers and ambient cure enamels, this solvent is used as a retarder solvent. Its slow evaporation rate allows for flow and leveling but does not prevent the quick rubbing and sanding of the lacquer. Many resins are letdown in a solvent thinning tank to make handling, storing, and shipping easier. Eastman™ n-Butyl Propionate is useful as a letdown solvent because of its low volatility, good solvent activity, and urethane grade quality.
Since n-Butyl Propionate is not on EPA's HAP list, it is a good choice for replacing xylene in coating applications such as high-solids thermoset enamels. It is also used as a processing solvent for high-solids acrylic resins, and for coatings applied via electrostatic spray equipment.
Typical Properties
Property
Typical Value, Units
General
Assay
99.5 wt % min.
Autoignition Temperature
427 °C
Boiling Point
@ 760 mm Hg
145-149 °C (293-300 °F)
Color
Pt-Co
10 max.
Dilution Ratio
Toluene
1.8
VMP Naphtha
1.1
Electrical Resistance
>20 Megohms
Empirical Formula
C
7
H
14
O
2
Evaporation Rate
(ether = 1)
24.2
(n-butyl acetate = 1)
0.5
Flash Point
Setaflash Closed Cup
36 °C (97 °F)
Form
Liquid
Freezing Point
-75 °C (-103 °F)
Hansen Solubility Parameters
Total
17.7 (MPa)
½
Nonpolar
15.7 (MPa)
½
Polar
5.5 (MPa)
½
Hydrogen Bonding
5.9 (MPa)
½
Molecular Weight
130.19
Odor
Ester
Refractive Index
@ 20°C
1.404
Solubility
in Water, @ 20°C
0.4 wt %
Water in, @ 20°C
0.7 wt %
Specific Gravity
@ 20°C/20°C
0.876
Surface Tension
@ 20°C
25.3 dynes/cm
Vapor Density
4.5
Vapor Pressure
@ 20°C
3.0 mm Hg
@ 55°C
3.3 kPa
Viscosity
@ 25°C, 8% CAB-381-0.5
30 cP
@ 25°C, 8% RS
1
/
2-
s NC
28 cP
Wt/Vol
@ 20°C
0.87 kg/L (7.30 lb/gal)
Comments
Properties reported here are typical of average lots. Eastman makes no representation that the material in any particular shipment will conform exactly to the values given.
Eastman and its marketing affiliates shall not be responsible for the use of this information, or of any product, method, or apparatus mentioned, and you must make your own determination of its suitability and completeness for your own use, for the protection of the environment, and for the health and safety of your employees and purchasers of your products. No warranty is made of the merchantability of fitness of any product, and nothing herein waives any of the Seller's conditions of sale.
3/20/2025 12:48:12 PM