4223F Technical Data Sheet
Premium Polyurethane Conformal Coating
ISO 9001:2008 Registered Quality System. Burlington, Ontario, CANADA
SAI Global File: 004008
4223F-Liquid
Description
The 4223F
Premium Polyurethane Conformal Coating
is an easy-to-use product that is UL recognized to
the 746E standard for conformal coatings. This one-part product heat cures to form a protective coating
that resists abrasion and chemical attacks. It is, therefore, ideal for chemically or mechanically aggressive
environments. In addition, the 4223F is without isocyanates, xylenes, or other hazardous air pollutants.
And lastly, the coating is easily repairable. All these characteristics make for a versatile conformal coating
of premium quality.
The 4223F coating protects electronic circuits from physical, electrical, and corrosion damages. It resists
dirt, dust, humidity, and chemically aggressive products. It also resists abrasion, scratches, and thermal
shocks. It protects against short circuits, static discharges, and high-voltage arcing, which allows for the
miniaturization of circuits by reducing the minimal spacing between traces. In summary, it efficiently
protects your electronic components from several common failure modes.
Applications & Usages
The 4223F coating improves reliability, operational range, and lengthens the life of electronic components
and electrical assemblies. This protection coating is especially useful in corrosive environments such as
those found in the farming, mining, smelting, oil exploration, and marine industries. Other common uses
of the urethane conformal coatings are with electric relays, motors, transformers, and generators. The
coating also can be found in commercial products such as sensors, automotive electronics, fire alarms
components, and air bag controllers.
Features and Benefits
•
•
•
•
•
•
•
•
UL certified as a conformal coating
according to
UL 746E
(file #
E203094)
Externally qualified
to the August 2002
IPC-CC-830B-class
A standard, by Pacific Testing
Laboratories
Excellent finish—smooth,
flexible, mar resistant
High chemical resistance—resists
water, solvents, and most household chemicals
Durable—abrasion
resistant
Protects electronics from
moisture, corrosion, fungus, and static discharges
Easy to inspect—fluoresces
under black light (UV-A)
Easy rework and repairs
o
o
•
Can solder through the coating
Removable with MG 8312 Conformal Coating Stripper
Free of isocyanate, xylene, and other hazardous air pollutants
A
TTENTION
!
Heat curable product.
The 4223F is not suitable for room temperature cure.
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Date: 10 April 2018 / Ver. 2.05
4223F Technical Data Sheet
Premium Polyurethane Conformal Coating
ISO 9001:2008 Registered Quality System. Burlington, Ontario, CANADA
SAI Global File: 004008
4223F-Liquid
Usage Parameters
Properties
Tack Free
a)
Recoat time
a)
Drying Time @80 °C [176 °F]
Shelf Life
Theoretical HVLP Spray
Coverage
a)
Value
15 min
3 min
16 h
3y
≤90
000 cm
2
/L
≤9
m
2
/L
≤52
900 in
2
/gal
≤367
ft
2
/gal
Temperature Ranges
Properties
Constant Service
Temperature
Storage Temperature
Limits
Value
-65 to 125 °C
[-85 to 257 °F]
-5 to 40 °C
[23 to 104 °F]
a) Assumes a 2:1 dilution ratio with MG 4354
Thinner
b) Idealized coverage based on a coat thickness
of 24.5
m
[1.0 mil] and 65% transfer
efficiency.
Properties of Cured 4223F
Physical Properties
Color
Solderability
Chemical Resistance
Weather Resistance
Fungus Resistance
Flexibility
Flammability
Glass Transition Temperature (Tg)
Coefficient of Thermal Expansion
Before Tg
After Tg
UV Inspection Absorption Max
UV inspection
Fluorescence max
Electrical Properties
Breakdown Voltage @1.2 mil
Dielectric Strength @1.2 mil
Dielectric Withstand Voltage
Insulation Resistance (after 24 hours)
Method
Visual
—
—
—
IPC-TM-650 2.6.1.1
IPC-TM-650 2.4.5.1
UL 94V-0
Optical Dilatometer
"
"
"
"
"
"
Absorption spectrum
Emission spectrum
Method
ASTM D 149
"
IPC-TM-650 Test 2.5.7.2
IPC-TM-650 Test 2.6.3.4
Value
Clear, amber tint
Good
Excellent
Excellent
Passed
Passed
Passed
57.1 °C
130
190
375
437
ppm/°C
ppm/°C
nm (near UV)
nm (blue)
Value
1 200 V
1 000 V/mil
>1 500 V
9 × 10
12
Ω
1.2 kV
0.04 kV/mm
Note:
See Appendix A for UL 746E and IPC-CC-830B standards test results.
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Date: 10 April 2018 / Ver. 2.05
4223F Technical Data Sheet
Premium Polyurethane Conformal Coating
ISO 9001:2008 Registered Quality System. Burlington, Ontario, CANADA
SAI Global File: 004008
4223F-Liquid
Properties of Uncured 4223F
Physical Properties
Odor
Viscosity @25 °C [77 °F]
Percent Solids
Density
Flash Point
Boiling Point
Method
—
Brookfield SP1
Calculated
ASTM D 1475
Closed Cup
Value
Mild petroleum
330 cP [0.330 Pa·s]
45% (weight)
0.89 g/mL
-104 °C [-155 °F]
80 °C [176 °F]
Compatibility
The 4223F coating is compatible with most materials found on printed circuit assemblies; however, in an
uncured state it is incompatible with water, oil, and greasy flux residues. Therefore, it is extremely
important to clean the printed circuit assembly thoroughly with a suitable electronic cleaner before
applying the coating.
The chosen electronic cleaner must remove moisture, wax, greases, oils, and all other contaminants that
are known to cause defects for this type of conformal coating (see recommended cleaners on page 5).
Health, Safety, and Environmental Awareness
Please see the 4223F-Liquid
Safety Data Sheet
(SDS) for more details on transportation, storage,
handling and other security guidelines.
Hazardous Chemical Components
Name
CAS Number
N-heptane
142-82-5
Stoddard solvent
8052-41-3
Methyl Ethyl Ketone (MEK)
78-93-3
Environmental Impact:
The volatile organic compound percentage is 55% (489 g/L) by the US EPA and
the Canadian Environmental Protection Act, 1999.
This product meets the European Directive
2011/65/EU Annex II (ROHS);
recasting 2002/95/EC.
Health and Safety:
The liquid and spray is flammable and should be kept away from flames and other
ignition sources. As with most paint materials, avoid breathing in fumes or direct contact. Solvents therein
can cause irritation and other symptoms like headaches, pain, as well as having long term exposure
effects.
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Date: 10 April 2018 / Ver. 2.05
4223F Technical Data Sheet
Premium Polyurethane Conformal Coating
ISO 9001:2008 Registered Quality System. Burlington, Ontario, CANADA
SAI Global File: 004008
4223F-Liquid
NFPA® 704 CODES
HMIS® RATING
HEALTH:
FLAMMABILITY:
PHYSICAL HAZARD:
PERSONAL PROTECTION:
Approximate HMIS and NFPA Risk Ratings Legend:
0 (Low or none); 1 (Slight); 2 (Moderate); 3 (Serious); 4 (Severe)
* 2
3
0
3
2
0
Wear protective gloves and eye protection. Wash hands thoroughly after handling. Use only in open air or
in a well-ventilated area.
The cured coating presents no known hazard.
Application Instructions
The 4223F can be easily applied by the paintbrush, spray gun, or dip method. We recommend a final dry
film thickness of at least 1.0 mil [25
m]
for most applications.
Material & Equipment
•
•
•
•
Mixing spatula
Clean paint brush
OR
HVLP spray gun
OR
dip tank system
Thinner/Solvent
Personal protection equipment (See 4233F-Liquid SDS)
Paint Dilution Ratios
For brush or dip applications, the MG 4223F conformal coating is ready-to-use without dilution. You may
however dilute it to improve coat leveling, to facilitate brush application, to prevent brush marks, or to
control the dry film thickness.
For spray application, we recommend a 2:1 paint-to-thinner ratio as a starting point. Then, adjust this
dilution ratio based on the equipment, viscosity, or other operational parameters. The recommended
thinner is the MG 4352 Thinner 2.
Surface Preparation
Clean oil, dust, water, solvents, and other contaminants. Let dry fully.
Page
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Date: 10 April 2018 / Ver. 2.05
4223F Technical Data Sheet
Premium Polyurethane Conformal Coating
ISO 9001:2008 Registered Quality System. Burlington, Ontario, CANADA
SAI Global File: 004008
4223F-Liquid
Spray Gun Application Instructions
Read the procedure fully and make necessary adjustments to get the required coat thickness for your
needs. For a 2:1 dilution, one spray coat typically results in a dry film thickness of roughly 1 mil [25
m].
Spray Equipment
Use a HVLP (high-volume, low pressure) spray gun using the initial settings described in the following
table. Adjust these settings and recommendations as required.
Initial Setting Recommendations
Air Cap
Pressure
Fluid Tip
#3 HVLP
Inlet
23 psi
1.3 mm [0.051"]
Air flow
b)
13.5
1.5 mm [0.059"]
a)
Air cap
10 psi
Note:
These recommendations are based on a generic paint gun and may differ by brands. Please consult
your spray gun manufacturer’s guide.
a) If no or reduced let down is performed, this may be a better tip choice.
b) SCFM = standard cubic foot per minute
To apply the required coating thickness
1. Mix the paint thoroughly with a paint shaker, mixer, or spatula.
2. Dilute by a ratio of
2:1
(Paint:Thinner) or another ratio of your choice.
3. Make a test spray. Adjust the spray settings for best flow and spray quality, and establish an
appropriate distance to avoid paint runs. A distance between 23 to 30 cm (9 to 12 in) is
recommended.
4. Spray a thin and even coat onto the vertical surface to be coated. For best results, start your
movement off-surface, press the trigger, and only release off-surface at the end of the stroke. Use
a uniform movement of the spray gun parallel to the surface.
5. Wait at least 5 minutes and spray another coat. This delay avoids trapping solvent between coats.
6. Rotate the board 90° to ensure good coverage.
7. Apply additional coats until desired thickness is achieved. (Go to Step 3.)
8. Let dry for 15 minutes (flash off time) at room temperature.
A
TTENTION
!
Spraying overly thick coats may cause paint runs and hamper solvent evaporation.
Prefer the application of many thin wet coats rather than fewer heavy coats.
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Date: 10 April 2018 / Ver. 2.05
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