Premium Polyurethane Conformal Coating
4223D Technical Data Sheet
4223D-Liquid
Description
Our 4223D Polyurethane Conformal Coating is an IPC-CC-830B and UL 94-V0 certified, heat curing, one
part product that provides an excellent scratch and chemical resistant finish. This one part coating is easy
to use and repair: it does not require special or costly equipment or materials. It is ideal for chemically
challenging environments.
The 4223D urethane protects electric circuits against aggressive chemicals, moisture, dirt, dust, thermal
shocks, and scratches. This avoids corrosion and physical damages to electric components. It insulates
against high-voltage arcing, shorts, and static discharges, allowing for traces to be put closer to one
another.
Applications & Usages
The 4223D coating improves reliability, operational range, and lengthens the life of electrical and
electronic components and assemblies. It finds application especially for corrosive environments such as
those found in the farming, mining, smelting, oil exploration, and marine industries.
Common urethane conformal coatings uses are with electric generators, motors, transformers, relays, and
air bag controllers. Commercial applications include fire alarms components, sensors, automotive
electronics, electrical connectors, and porcelains.
Benefits
•
•
•
•
•
•
•
•
•
Certified
UL 94V-0
(File #
E203094)
Externally Qualified
to
IPC-CC-830B-class
A, 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 light)
Easy rework and repairs—can
solder through coat
● removable
with MG 8312 Urethane
Conformal Coating Stripper
Free of isocyanate
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Premium Polyurethane Conformal Coating
4223D Technical Data Sheet
4223D-Liquid
Usage Parameters
Properties
Tack Free
Recoat time
Full Cure @80 °C [176 °F]
Shelf Life
Maximum coverage
per liter
b)
Maximum coverage
per US gallon
b)
Value
10 to 15 min
2 to 3 min
18 h
3y
≤114
000 cm
2
[≤123
ft
2
]
≤435
000 cm
2
[≤468
ft
2
]
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 let 1:1 let down with MG 4354
Thinner solvent
b) Idealized estimate based on a coat thickness
of 25
m
[1.0 mil] and 65% transfer efficiency.
Chemical Components
Name
Polyurethane Resin
Xylene (mixture)
Ethylbenzene
Methyl Ethyl Ketone (MEK)
CAS Number
proprietary
1330-20-7
100-41-4
78-93-3
Properties of Cured 4223D
Physical Properties
Color
Solderability
Chemical Resistance
Weather Resistance
Fungus Resistance
Flexibility
Flammability
Electric Properties
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 registered
E203094
Method
per IPC-TM-650
IPC-TM-650 Test 2.6.3.4
Value
Clear, amber tint
Good
Excellent
Excellent
Pending
Pending
94V-0
Value
>1500 V
9 × 10
12
Ω
Note:
See Appendix A for UL 94V-0 and IPC-CC-830B standards test results.
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Premium Polyurethane Conformal Coating
4223D Technical Data Sheet
4223D-Liquid
Properties of Uncured 4223D
Physical Properties
Odor
Viscosity @25 °C [77 °F]
Density
Flash Point
Boiling Point
Solids Content (w/w)
Method
—
Brookfield SP1
ASTM D 1475
Closed Cup
Value
Mild, pungent
330 cP [0.330 Pa·s]
0.97 g/ml
-3 °C [26 °F]
≥80
°C
[≥176
°F]
44.8%
Compatibility
The 4223D polyurethane coating is compatible with most materials found on printed circuit assemblies;
however, in an uncured state it is not compatible with contaminants like 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 should remove moisture, wax, greases, oils, and all other contaminants that
are known to cause defects in this type of conformal coating. (See recommended cleaners on page 3.)
Health, Safety, and Environmental Awareness
Please see the 4223D-Liquid
Material Safety Data Sheet
(MSDS) for more details on transportation,
storage, handling and other security guidelines.
Environmental Impact:
The volatile organic content is 55.2% (534 g/L) by EPA and WHMIS standards.
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 with the
material. Solvents therein can cause irritation and other symptoms like headaches, pain, as well as having
long term exposure effects.
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)
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NFPA® 704 CODES
2
3
0
3
2
0
Premium Polyurethane Conformal Coating
4223D Technical Data Sheet
4223D-Liquid
Wear safety glasses and disposable gloves. Wash hands thoroughly after use. Use in the open air, in fume
hoods, or in well ventilated area. For short or long term (8 hours) at levels of exposures exceeding of
100 ppm of xylene or ethylbenzene, use NIOSH approved respirator with organic vapor cartridges rated
for this order of concentrations.
The cured coating presents no known hazard.
Spray Gun Application Instructions
Follow the procedure below for best results.
To apply the required thickness by weight
1. Mix thoroughly, and spray a test pattern.
This step ensures good flow quality and helps establish appropriate distance to avoid runs.
2. At a distance of 20 to 25 cm (8 to 10 inches), hold the gun at around 45°, and spray a thin and
even coat onto the horizontal board. For best results, use spray-and-release strokes with an even
motion to avoid excess paint in one spot.
3. Before the next coat, rotate the board 90° to ensure good coverage.
4. Wait at least 2 minutes, and spray another coat. The delay avoids
trapping solvent between coats.
5. Apply other coats until desired thickness is achieved. (Go to Step 3)
6. Let dry for 3-5 minutes (flash off time) at room temperature.
To accelerate cure by heat
•
After flash off, put in oven or under heat lamp at ≤80
°C for 18 hours.
Packaging and Supporting Products
Cat. No.
4223D-1L
4223D-4L
4223D-20L
Packaging
Can
Can
Pail
Net Volume
0.90 L
32.0 fl oz
3.80 L
1.00 gal
20.0 L
5.00 gal
Net Weight
0.92 kg
3.69 kg
18.4 kg
2.00 lb
8.10 lb
40.6 lb
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Premium Polyurethane Conformal Coating
4223D Technical Data Sheet
4223D-Liquid
Technical Support
Contact us regarding any questions, improvement suggestions, or problems with this product. Application
notes, instructions, and FAQs are located at
www.mgchemicals.com.
Email:
support@mgchemicals.com
Phone: 1-800-340-0772 Ext. 1030 (Canada, Mexico & USA)
1-905-331-1396 Ext. 1030 (International)
Fax: 1-905-331-2862 or 1-800-340-0773
Mailing address:
Manufacturing & Support
1210 Corporate Drive
Burlington, Ontario, Canada
L7L 5R6
Head Office
9347–193rd Street
Surrey, British Columbia, Canada
V4N 4E7
Disclaimer
This information is believed to be accurate. It is intended for professional end users having the skills to
evaluate and use the data properly.
M.G. Chemicals Ltd.
does not guarantee the accuracy of the data and
assumes no liability in connection with damages incurred while using it.
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