DURETHANE® Polyurethane System Form P-138 (9/90 ... - BAPS

DURETHANE® Polyurethane System Form P-138 (9/90)
DU
IDENTITY
DURETHANE Polyurethane Color
Urethane Hardener
Urethane Hardener
DT Reducers
Cool Temperature
Normal Temperature
Warm Temperature
Hot Temperature
Retarder
BACKGROUND
CODE
DU
DU 5 (70 - 85°F) (21 - 29°C)
DU 6 (85°F & Above) (29°C & Above)
DT 860 (60 - 70°F) (16 - 21°C)
DT 870 (65 - 80°F) (18 - 27°C)
DT 885 (75 - 90°F) (24 - 32°C)
DT 95 (85°F & Above) (29°C & Above)
DT 8110 (85 - 110°F) (29 - 44°C)
⋅For use as a retarder above 85°F
(29°C)
⋅Do not use as a reducer, (may be
mixed with DT 95 Reducer up to 25%)
DURETHANE Polyurethane finishing systems provide coatings that are highly resistant to
many chemicals and fuels used in the aircraft and transportation industries.
These systems may also be used for maintaining airport ground & operation equipment,
fleet vehicles, and off the road equipment. Properties such as abrasion, impact chip
resistance, graffiti resistance, color and gloss retention on long term exposure are inherent
in DURETHANE finishes.
DIRECTIONS FOR USE
Preparation: Painting systems over various substrates:
A. Aluminum (Aircraft commercial and high performance) Scrub surface with abrasive
pad (i.e. Norton Co. "Bear Tex" or 3M Scotchbrite 7001 or equivalent) with water
until surface wets evenly with no beading of liquid. Apply DX 533 Aluminum
Cleaner. Rinse with water. Condition surface with DX 503 Aluminum Conditioner.
Rinse with water. Dry and apply Wash primer (DX 1791/DX 1792), DURETHANE
Primer (DPU 35/301) and DURETHANE topcoat color.
IMPORTANT: See separate section concerning Skydrol resistance.
1 Form P-138 (9/90)

B. Aluminum (General Aviation Aircraft, truck bodies and misc) Apply DX 533
Aluminum Cleaner. Rinse with water. Condition surface with DX 503 Aluminum
Conditioner. Rinse with water. Dry and apply DP Epoxy Primer/401 Catalyst and
DURETHANE® topcoat color.
C. Cold rolled steel or steel plate (with little or no rust or mil scale). Treat surface with
DX 579 Metal Cleaner. Rinse with water. Apply DX 520 Metal Conditioner. Rinse
with water. Dry and apply DP Epoxy Primer/401 Catalyst and DURETHANE
topcoat color.
D. Cold Rolled Steel or Steel Plate (with heavy rusting or mil scale). Sand blast
surface to gray metal. Blow off dust with clean compressed air. Clean with
ACRYLI-CLEAN® Wax and Grease Remover (DX 330). Apply DP Epoxy
Primer/401 Catalyst and DURETHANE topcoat color.
E. Old DURETHANE, Epoxy, or other catalyzed finishes. Wash with ACRYLI-CLEAN
Wax and Grease Remover (DX 330). Sand thoroughly with 220 grit or finer DA or
320-400 wet or dry. Reclean surfaces. Apply DURETHANE Primer (DPU 35/301)
or DP Epoxy Primer/401 Catalyst, then topcoat with DURETHANE color.
F. Fiberglass. New molded parts should be washed with a clean cloth liberally
soaked with alcohol. Dry with clean white cloths. Wash thoroughly with
ACRYLI-CLEAN Wax and Grease Remover (DX 330). Lightly sand to remove all
gloss with 320 grit or finer. Avoid sanding through gelcoat - make sure
fiberglass strands are not showing. Reclean surface. Apply DP Epoxy Primer/401
Catalyst and DURETHANE topcoat color.
Mixing: Mix DU Colors thoroughly with the appropriate DT Reducer and DU Hardener
best suited for shop conditions using the following ratios:
DU 5 or DU 6
DU Color DT Reducer Hardener
Solid Colors 1 gallon 2-3 quarts 1 gallon
Metallic Colors 1 gallon 3-4 quarts 1 gallon
Application and Dry Times:
×Set air pressure for 45 - 50 lbs. at the gun when using a siphon feed gun.
×Apply 2-3 full wet coats.
×Allow 15 to 20 minutes tack time between coats.
×Allow the final coat to air dry at normal temperature (75°F/24°C) for 16 hours or force dry
for 50 minutes @ 160°F (71°C).
2 Form P-138 (9/90)

Application of Second Color (Two-Toning):
If a second color is to be applied, allow the first color to air dry a minimum of 8 hours at
normal conditions (75°F/24°C) before taping. Tape time may be reduced to approximately
4 hours with the use of DXR 81 Accelerator additive in the first color at the rate of 1 fluid
ounce per gallon of ready to spray DURETHANE® Color. Caution! This will also reduce
the sprayable pot life to 4 hours at normal temperature of 75°F (24°C).
Clearcoating (DU 1000):
For an extra high gloss glamour appearance, DURETHANE colors may be clearcoated with
DU 1000 clear topcoat. Allow the DU solid color to dry a minimum of 20 minutes and DU
metallic colors to dry a minimum of 2 hours, but no longer than 1 week before applying DU
1000 Clearcoat.
Mix one part DU 1000 with ½ part of DT Reducer and 1 part DU 5 or DU 6 Hardener
(1:½:1). Apply two full wet coats using 50 PSI at the gun with approximately 30 minutes
tack time between coats but within 2 hours. If tack time exceeds two hours, allow the final
coat to dry overnight. Example:
Recoating:
DU 1000 DT Reducer DU 5 or DU 6
1 part ½ part 1 part
or or or
4 quarts 2 quarts 4 quarts
DURETHANE may be recoated with itself after curing for a minimum of 8 hours @ 75°F
(24°C) or a maximum of 1 week. After 1 week, scuff sand with 320 - 400 wet or dry, reclean
with DX 330, and reapply DU Color.
Flexible Substrates:
No flexible additive is necessary when applying DURETHANE Color over most flexible
substrates.
Additives:
DX 77 Fisheye Preventor: Surfaces to be painted must be thoroughly cleaned and
prepared. The use of DX 77 is not recommended unless absolutely necessary. Flowout is
decreased in direct proportion to the amount of preventor used. When necessary, DX 77
may be used in a ratio of 1 to 2 screw capfuls per sprayable quart of DU Color.
DXR 81 Accelerator: Accelerators are used to speed up the tape and dry times or to help
when two-toning. The dry time of DU Color may be accelerated with DXR 81 by using up to
½ ounce per sprayable quart or 2 ounces per sprayable gallon.
3 Form P-138 (9/90)

Caution: The use of DXR 81 Accelerator will result in shorter pot life and as the amount
of DXR 81 is increased, the degree of gloss is decreased.
Flattening Agent for Durethane:
Use Flattening Agent (DX 685) DURETHANE® Polyurethane as specified in the chart
below:
DU Color or Clear 60° Gloss Meter DX 685 DU Hardener
32 oz. Flat 0-5° 42 oz. 32 oz.
32 oz. Eggshell 20-30° 37 oz. 32 oz.
32 oz. Semi-gloss 50-60° 30 oz. 32 oz.
When DX 685 is added, no reducer is needed in this system.
Note: The amount of film build and application procedure can affect the gloss level.
Skydrol Resistance:
When resistance to Skydrol Hydraulic fluid and other extremely harsh chemicals is
required, such as commercial and high performance aircraft and certain chemical
haulers, the DXU 790 Activator used in the DURETHANE intermix color formulation
must be replaced on an equal weight basis with DXU 789 Activator. NOTE: This
applies only to solid colors. DXU 789 Activator should never be used in metallic
formulations.
SPRAY EQUIPMENT
Tests have shown these finishes to be versatile with pressure feed, airless, siphon
feed, and HVLP spray gun systems. Whatever application method is used, it is
recommended that a test panel be used to adjust the equipment to assure that proper
atomization of material is attained.
Suggested starting points for air pressure adjustments are:
Pressure Pot System:
Siphon System:
Airless System:
HVLP Systems:
8 lbs. at pot
45 lbs. at the gun
45 - 50 lbs. at the gun
30 - 40 lbs. on a 25 -1 pump pressure
gauge
0.013 orifice tip
15" fan
10 lbs. max atomizing air at tip
4 Form P-138 (9/90)

ACCUSPRAY,
Model 10 Series Fluid Tip #36; Air Cap #10
BINKS, HVLP Mach I
Fluid Tip #94 (.055") Air Cap #95 P
CSI, Softair Fluid Tip #4; Air Cap #4
DEVILBISS, JGHV 501
System 1151 Fluid Tip FY (.039"); Air Cap #14
HVLP, HVLP 5000 Fluid Tip 5100 - 12; Air Cap 5004 - 07
MATTSON, LP - 88 Fluid Tip #3 Cartridge N032 Blk. Ring; #3
Air Cap 3 - 5 PSI, cup pressure 5 - 7 PSI
High production #4 cartridge N040 Gld.Ring
Equipment Cleaning:
Use only DT Reducers, DTL Acrylic Lacquer Thinners or Methyl Ethyl Ketone (MEK) for
clean up of spray guns, lines, and equipment. Cleaning should be done immediately
after use to prevent the possibility of material gelling in the equipment. Keep
containers tightly closed when not in use. Hardeners, in particular, will react with
atmospheric moisture.
COMPATIBLE UNDERCOATS: DURETHANE® (DU) may be used over:
DP Epoxy Primers/401 Catalyst
DURETHANE (DPU 35/301) Primer/Hardener
DPE 1538 Zinc Chromate Primer
DPE 656, 1202, 1338 Synthetic Primers
DPX 844 Elastomeric Primer
ROADGUARD® (DX 54)
DX 1791/1792 Wash Primer
*K 200/K 201 Acrylic Urethane Primer Surfacer
*K 36/K 201 Acrylic Urethane Primer Surfacer
*NCT® NCP 250/NCX 255 Primer Surfacer
*Must be sealed with DP Epoxy reduced as a sealer, KTS 30 2K Sealer, or DPU
35/301.
INCOMPATIBLE UNDERCOATS: DURETHANE may not be used over:
SEALER 70 (DL 1970) Primer Sealer
DEL-SEAL® (DAS 1980 or DAS 1987) Acrylic Sealers
DZL 32, 34, 72 Lacquer Primer Surfacers
KONDAR® (DZ 3 or 7) Acrylic Primer Surfacers
DPX 800 Polypropylene Primer
DFL Putties
DSX 1900 Bonding Clear
5 Form P-138 (9/90)

Cautions:
DURETHANE® system products are designed to work best at temperatures between
70 - 85°F (21 - 29°C). Painted objects should be dried at no lower than 60°F (15°C) for
the first 24 hours. Do not return catalyzed material to partly full original containers,
since these products have a pot life.
Do not use DU 4 Hardener in Durethane Color systems.
TEST PROPERTIES
VOC (Unreduced Color)
3.9 to 4.4 #/U.S. gal
VOC (Ready to Spray) (1:½:1) 4.6 to 4.8 #/U.S. gal
Application Viscosity (#2 Zahn)
15 - 20 Seconds
Total Solids by Volume (Average) (1:1:1) 36%
Total Solids by Weight (Average) (1:3/4:1) 37%
Square Foot Coverage (1 mil @
575 sq. ft. #/U.S. gal.
100% transfer efficiency)
Recommended Dry Film Build
2.0 to 2.5 mils
Recommended Wet Film Build
4 to 5 mils
Recommended Wet Film Build Per Coat
2 to 2.5 mils
Sprayable Pot Life @ 75°F (24°C)
5 to 6 hours
Flash Point (PMCC)
70°F (21°C)
Tack Time Between Coats
15 to 20 minutes
Air Dry Recommendation
16 hours
Bake Schedule
40 - 50 minutes @ 160°F (71°C)
Dust Free Time
45 minutes
Tack Free Time
3 hours
Tape Free Time
8 hours
Recoat Time
8 hours
Gloss (20 degrees) 90 +
Pencil Hardness
2 H min.
Test Results
Test Result Comments
Specular Gloss
60 degrees 95
20 degrees 90
Accelerated Weathering
ASTM G-23, 500 hrs
Film Failure
None
Gloss Retention
60 degrees 90%
20 degrees 88%
6 Form P-138 (9/90)

Test Results Cont.
Test Result Comments
ASTM G-53, 500 hrs.
Film Failure
None
Gloss Retention
60 degrees 98%
20 degrees 98%
Solvent Resistance
25 Double Rubs No Effect
Pencil Hardness
Resistance to Cycles
of cold and heat
High Temp Resistance
3H
No cracking, etc.
No blisters, etc.
Impact Resistance 140 in/lbs Passed
60 in/lbs Passed
Corrosion Resistance

Test Results Cont.
Test Result Comments
GM Cycle Excellent No cracking at 24 cycles
Humidity Resistance Excellent 200 hrs.
(100°F/38°C, 100% R.H.)
Florida Exposure (1 yr.) Excellent Horizontal
Recoat Sensitivity
None
Toluene Resistance Excellent No softening, slight
marking after drop of
Toluene has evaporated.
***When DXR 81 Accelerator is used
Resistance Testing:
Panel Preparation Cold Rolled Steel cleaned and treated with DX 579 Metal
Cleaner and DX 520 Metal Conditioner after sanding with #220 grit. DP Epoxy Primer
was applied, followed by DU Color. All testing was performed by an independent lab for
use in mass transit repair applications.
See Material Safety Data Sheet and label for additional information and
handling instructions.
EMERGENCY MEDICAL OR SPILL CONTROL INFORMATION (304)843-1300.
IN CANADA (514) 645-1320.
PPG INDUSTRIES
PPG CANADA
19699 PROGRESS DRIVE 880 AVONHEAD ROAD
STRONGSVILLE, OH 44136
MISSISSAUGA, ONTARIO L5J 2Z5
Materials described are designed for application only by professional, trained personnel using proper equipment and are not intended for sale to the general public. Products mentioned may be hazardous
and should only be used according to label directions, while observing precautions and warning statements listed on label. Statements and methods described are based upon the best information and
practices known to PPG Industries. Procedures for applications mentioned are suggestions only and are not to be construed as representations or warranties as to performance, results, or fitness for any
intended use, nor does PPG Industries warrant freedom from patent infringement in the use of any formula or process set forth herein.
8 Form P-138 (9/90)