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Dow DOWANOL TPNB (DALPAD C) is a low-volatile glycol ether solvent in Dow's DOWANOL™ series. Designed for water-based coating film formation, high-end ink formulation, industrial cleaning and other systems, it is a colorless and low-odor high-efficiency functional solvent with excellent coalescent performance and high organic solubility
Excellent Film-Forming Enhancement - Outstanding coalescent efficiency, reducing coating film formation temperature and improving film integrity
Ultra-Low Volatility & Odor - Extremely slow evaporation rate and low odor, suitable for indoor environmental protection scenarios
Efficient Solvency & Compatibility - Strong organic solubility, compatible with various resins, excellent formulation adaptability
Low Viscosity & Processability - Low viscosity and good fluidity, easy to add and formulate, improving processing efficiency
Water-Based Coating Field - Used as coalescent aid in water-based wood coatings and interior wall coatings to improve film texture and scrub resistance
High-End Ink Field - Used as solvent for ballpoint pen oil and textile printing inks to optimize writing fluency and color development effect
Industrial Cleaning Field - Applied in high-end household cleaners and metal hard surface cleaners to efficiently remove oil stains
Floor Treatment Field - Suitable for floor coatings and floor wax strippers to improve cleaning and construction effects
| Chemical Name | Tripropylene Glycol Monobutyl Ether |
| English Alias | TPNB |
| CAS No. | 55934-93-5 |
| Molecular Formula | C₁₃H₂₈O₄ |
| Molecular Weight | 248.4 g/mol |
| Physical Form | Colorless transparent liquid, practically odorless |
| Boiling Point (760 mmHg, 1.01 bar) | 275 ℃ (527 ℉) |
| Flash Point (Closed Cup) | 126 ℃ |
| Freezing Point | -75 ℃ |
Q1: What is the primary function of DOWANOL TPNB in industrial coatings and inks?
A: DOWANOL TPNB functions primarily as an active coalescing agent and solvent carrier, helping to promote film formation in water-based acrylic and vinyl dispersions while improving flow, leveling, and substrate wetting.
Q2: How does DOWANOL TPNB compare to other glycol ether solvents in terms of evaporation rate and odor profile?
A: DOWANOL TPNB exhibits a slower evaporation rate than ethylene glycol ethers like EGBE or DPnB, supporting extended open time in high-solids formulations; it also features a significantly milder odor compared to many traditional butyl ether solvents, contributing to improved workplace handling characteristics.
Q3: Is DOWANOL TPNB compatible with common water-based polymer systems used in architectural and industrial maintenance coatings?
A: Yes — DOWANOL TPNB demonstrates broad compatibility with acrylic, styrene-acrylic, vinyl acetate copolymer, and polyurethane dispersions, and is widely used in both interior and exterior water-based coating systems without causing destabilization or haze.
Q4: What safety and handling considerations should be observed when using DOWANOL TPNB?
A: As with all organic solvents, appropriate engineering controls (e.g., ventilation) and personal protective equipment (e.g., nitrile gloves, eye protection) are recommended during handling; DOWANOL TPNB has low acute toxicity and is not classified as a skin sensitizer, but prolonged or repeated skin contact should be avoided.
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