Chemical Nomenclature: Dipropylene Glycol n-Butyl Ether
Cas No. : 29911-28-2
Structural Formula: C4H9O[CH2CH(CH3)O]2H
DOWANOL DPnB is dipropylene glycol n-butyl ether.
DOWANOL DPnB acts as an active solvent for solvent-based coatings, effective coalescent for for lowering minimum forming film temperature in water-borne latex coatings.
DOWANOL DPnB possesses good coupling ability.
DOWANOL DPnB offers very good solvency and good oil solubility.
DOWANOL DPnB exhibits good evaporation rate control and low viscosity.
DOWANOL DPnB is used in latex coatings.
DOWANOL DPnB glycol ether is a slow-evaporating, hydrophobic glycol ether with excellent surface tension-lowering ability and coalescing properties.
DOWANOL DPnB is a relatively slow-evaporating solvent which is one of our most efficient coalescents in water-borne latex systems.
DOWANOL DPnB is a colorless liquid with a mild odor and low volatility.
DOWANOL DPnB has low water solubility, good coupling and demonstrates good solvency for coating resins.
The properties of DPNB support its use in agricultural, coating, cleaning, ink, textile, and adhesive products.
Applications of DOWANOL DPnB:
-Coupling agent and solvent in household and industrial cleaners, grease and paint removers, metal cleaners, and hard surface cleaners.
-Effective coalescent for lowering minimum film formation temperature MFFT) in water-borne latex coatings.
-Active solvent for solvent-based coatings.
-Chemical intermediate for the production of epoxides, acid ester derivatives, solvents, and plasticizers.
-Effective solvent for water-reducible coatings.
Uses of DOWANOL DPnB:
-Cleaners
-Textiles
-Cosmetics
-Resins
-Coating formulation and application
-Industrial, automotive and architectural coatings
DOWANOL DPnB is a slow-evaporating, hydrophobic glycol ether with excellent surface tension-lowering ability and coalescing properties.
DOWANOL DPnB has a near mid-range balance of hydrophobic and hydrophilic characteristics, and it offers significant water solubility.
DOWANOL DPnB also provides excellent surface tension lowering ability, and is useful in cleaning products by itself or when blended with other products.
DOWANOL DPnB is used alone in cold metal cleaning, it is a good solvent for removing oils and greases.
DOWANOL DPnB is an excellent choice for coatings applications
Typical applications of DOWANOL DPnB include;
-Cleaners
-Textils
-Resins
-Coating formulation and application
-Industrial, automotive and architectural coatings
Benefits of DOWANOL DPnB:
-Favorable environmental profile, superior performance for end use applications, formulations may require less Performance solvent than P or E Series
-Active and effective ether for solvent-based coatings and water-reducible coatings
-High polymer plasticizing efficiency
-A larger molecular size that allows for a greater polymer mobility contribution
-Strong partitioning to the polymer phase
-Relatively slow evaporation rate
-Good for the removal of soap scums and greasy soils in cleaning formulations
-Excellent surface tension-lowering ability and coalescing properties
Suggested Applications of DOWANOL DPnB:
Coalescent for water-borne latex coatings.
Active solvent for solvent-borne coatings.
Features of DOWANOL DPnB:
-Colorless
-Low odor
-Moderately soluble in water (19 ml/100 ml)
-Good chemical stability
-Excellent solvent properties
-Very efficient surface tension reduction
-Low toxicity
-Wide range of applications
DOWANOL DPnB glycol ether is a slow-evaporating, hydrophobic glycol ether with excellent surface tension-lowering ability and coalescing properties.
KEYWORDS:
29911-28-2, Dipropylene Glycol n-Butyl Ether, DOWANOL, Cleaners, Textils, Resins, Cosmetics, C4H9O[CH2CH(CH3)O]2H, Dowanol DPM, Dowanol PNB
Coatings: DOWANOL DPnBB shows excellent coalescing performance in various resins including Acrylics, Styrene-Acrylics and Polyvinyl Acetates.
DOWANOL DPnB also offers superior film forming characteristics.
These features, coupled with mild odor, make DOWANOL DPnB a preferred solvent for interior water-based paints.
Cleaners: DOWANOL DPnB has a mild odor and can be used in a variety of cleaners.
DOWANOL DPnB is particularly suited for use in cleaner formulations which require a slow evaporation rate, such as wax strippers and floor cleaners.
DOWANOL DPnB is an effective coupling agent for many greases and oils.
DOWANOL DPnB has low water solubility which is increased by the addition of low molecular weight alcohols and other propylene glycol ethers.
Other Applications: The properties listed in the previous section also support the use of DOWANOL DPnB in agriculture, cosmetics, electronics, ink, textile and adhesive products.
Specific end user may require approval by appropriate regulatory agencies.
Storage of DOWANOL DPnB:
General industry practice is to store DOWANOL DPnB in carbon steel vessels.
Avoid contact with air when storing for long periods of time.
DOWANOL DPnB should never be stored or handled in copper or copper alloys.
DOWANOL DPnB may absorb water if exposed to air.
Store DOWANOL DPnB only in tightly closed, properly vented containers away from heat, sparks, open flame or strong oxidizing agents.
Use DOWANOL DPnP only non-sparking tools.
Ground containers before transfer.
Electrical equipment should conform to national electric code.
Typical Properties of DOWANOL DPnB:
Density (pounds per gallon at 25oC): 7.6
Evaporation Rate (BuAc = 100): 1.0
Flash Point (SETA) oC (o F): 101 (214)
Solubility by weight in water at 20oC: 5%
Solubility Parameter (Total Hansen): 9.4
Surface Tension (Dynes/cm) @ 25oC (77o F): 29
Refractive Index @ 25oC (77o F): 42
Viscosity (centistokes) @ 25oC (77o F): 4.8
Vapor Pressure@ 25oC (77o F) (mmHg): 0.03
A slow-evaporating, hydrophobic glycol ether with excellent surface tension-lowering ability and coalescing properties.
DOWANOL DPnB has a near mid-range balance of hydrophobic and hydrophilic characteristics, and it offers significant water solubility.
DOWANOL DPnB is one of our most efficient coalescents in water-borne latex systems.
DOWANOL DPnB combines a number of properties that contribute to very high latex film quality:
1) high polymer plasticizing efficiency,
2) large molecular size and therefore greater polymer mobility contribution,
3) strong partitioning to the polymer phase, and
4) relatively slow evaporation rate.
DOWANOL DPnB is compatible with many different resin types.
DOWANOL DPnB also provides excellent surface tension lowering ability, and is useful in cleaning products by itself or when blended with other products.
DOWANOL DPnB is used alone in cold metal cleaning, it is a good solvent for removing oils and greases.
DOWANOL DPnB is an excellent choice for coatings applications, this product provides outstanding coalescing and film properties.
INCI Name: Dipropylene glycol n-butyl ether
Molecular Weight: 190.3 g/mol
Empirical Formula: C10H22O3
Appearance: Colorless
Freezing Point: <-75°C
(<-103°F)
Flash Point – Closed Cup: 100°C (212°F)
Boiling Point @ 760mmHg: 230°C (446°F)
Autoignition Temperature: 189°C (372°F)
Density @ 20°C: 0.91 kg/l
7.59 lb/gal
Vapor Pressure @ 20°C: <0.04 mmHg
Evaporation Rate (nBuAc = 1): 0.006
Solubility @ 20°C (in Water): 4.5 wt%
Refractive Index @ 25°C: 42
Viscosity @ 25°C: 4.9 cP
Surface Tension @ 25°C: 28.4 mN/m
Lower Flammability in Air: 0.6% v/v
Upper Flammability in Air: 20% v/v
Specific Heat @ 25°C: 1.79 J/g/°C
Heat of Vaporization @ normal boiling point: 252 J/g
Heat of Combustion @ 25°C: 30.8 kJ/g
Description of DOWANOL DPnP:
A slow-evaporating glycol ether with an excellent balance of hydrophilic and hydrophobic character; provides outstanding coalescing and film properties.
Introduction:
DOWANOL DPnP glycol ether has a slower evaporation rate than DOWANOL PnP glycol ether, and it is slightly more hydrophobic.
Yet overall, DOWANOL DPnP glycol ether has a near-midrange balance between hydrophobic and hydrophilic character, and it offers significant water solubility.
DOWANOL DPnP is a good choice in coatings; it offers very good coalescing performance in blends with more hydrophobic materials such as DOWANOL PPh or PnB glycol ethers.
DOWANOL DPnP glycol ether can also be blended with other materials to replace Butyl CELLOSOLVE™ glycol ether (formerly known as DOWANOL EB glycol ether).
Dowanols being chemically ethers of n-alkanols with bis(isopropylene glycol) represent characteristic properties of hydrotropic molecules or “solvo-surfactants”, i.e. they have some surfactant properties in addition to typical solvent properties.
The dynamic surface tension behaviour of aqueous Dowanol solutions (c ≤ 10–1 M) is a consequence of different surface-active components owing to the presence of different isomers and surface-active contaminants.
By applying a special purification method (“flounder technique”) we removed additional (non-Dowanol) surface-active trace impurities by aspirating them from the highly compressed adsorption layers.
The various sucked off fractions reveal peculiar surface properties that are quite different from those of the original and of the “surface-chemically” pure solutions.
Whereas the former show only short-time foam stability of a few seconds, the sucked-off fractions formed (meta)stabile foams lasting for a few hours.
DOWANOL is concluded that the Dowanol’s solvo-surfactant characteristic is caused by the synergistic effect of various surface-active species rather than by the special structure of an individual component.