DP-6337ib Airless Sprayer for Intumescent Fireproofing Paint Material

What are intumescent coatings?

Intumescent coatings provide an appearance similar to that of a paint finish. At ambient temperatures, they remain stable. However, in a fire situation, the increase in temperature causes a chemical reaction.

The intumescent coating expands to many times its original thickness. This provides an insulating foam-like coating or “char” which protects the substrate.

Protecting steelwork

The intumescent coating is designed to insulate the steel, and prevent the temperature of the steel from rising to a critical point at which structural failure becomes possible.

 

Protecting timber structures

Timber structures are more susceptible to the surface spread of flame and heat propagation. Intumescents are designed to reduce heat propagation, and reduce the spread of flame.

How do intumescents work?

The expansion process is caused by the interaction of three precisely formulated components:

Carbon supplier	Polyols as starch, pentaerythritol
Acid source	Ammonium polyphosphate
Expanding agent	Melamine
Note	These components are bound in a solvent or water-borne polymeric binder. Other components are added to improve the paint properties, enable easy application, enhance build and achieve faster drying.

 

Typical intumescent process

As heat is applied the chemical reaction begins:

 

The heat begins to soften the polymeric binder.

It also causes an organic acid to be released from the Ammonia Polyphosphate.

Carbonisation of the polyols begins.

As the blowing agent (melamine) decomposes, gas is produced which swells the molten mixture.

Finally, the foamed char solidifies, through a cross-linking reaction, to maintain the insulation.

In an ideal situation, intumescent can expand to around 100 times its original thickness. To achieve this requires careful selection of formulation components and precise matching of processes involved.

 

Storage and Handling:

Store the paint in proper conditions as per the local regulations. Keep the paint container in sealed condition under shed, away from direct sunlight and extreme temperatures. Don’t stock paint material near to any ignition sources. Don’t put back the half or unused material back in original container containing the supplies paint, to avoid contamination. Handle with care. Stir well before use.

 

Technical data:

Color, dry film	White or cool green
Finish, dry film	Smooth / Matt
Volume solids	54±2%
Solids (by weight)	66±2%
Specific gravity	1.35±0.05
Theoretical spreading	2.70M 2 / Ltr – 1.8M 2 / Ltr
Recommended DFT (dry film)	200-300Microns/Coat
Recommended WFT (wet film)	370-555 Microns/Coat
Fire resistance time	Up to 4hours
Note	An experienced applicator can apply up to 680 microns per coat using airless sprayer.

 

Drying time:

Temperature	Touch dry	Dry to recoat	Hard dry
10 ºC（50 ºF）	6hours	24hours	Unlimited
15 ºC（59 ºF）	5hours	24hours	Unlimited
25 ºC（77 ºF）	4hours	20hours	Unlimited
40 ºC（104 ºF）	3hours	18hours	Unlimited

 

Additional data:

Shelf life at 30ºC

6 months, in original sealed container, with proper storage conditions. Store in dry and cool place (5-35ºC)

 

 

Application data:

Application method	Airless sprayer, brush, roller
Cleaning / thinning	Water
Thinner (volume)	Ready to use, when applied by spray equipment, otherwise and if necessary, use up to 10% thinning with water.
CONV. Spray requirements	Possible
Airless spray requirements	Pressure: 120-150bar (1700-2125psi)
Nozzle size	0.019”-0.021”
Mixing ratio (by volume)	One pack

 

Our DP-6337ib professional electric airless sprayer piston pump could be used for water-based intumescent paint spraying, prefect finish.

 

Ideal for oil-based and water-based fireproofing materials painting (about 1mm thickness each layer).

Two guns spraying at the same time is available, high efficiency, save more working time.

Technical data:

Model No.	DP-6337ib with brushless motor
Voltage	220-240V/50-60HZ, 110V/60HZ
Pressure control	Electronical + digital
Max. flow rate	7L/min
Max. tip size (1 gun)	0.043”
Max. tip size (2 guns)	0.027”
Max. spraying pressure	120bar/1740psi(0.041”)
	140bar/2035psi(0.039”)

DP-6337iB Electric Airless Piston Pump 7.0L for intumescent paint spraying