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Aerospace
Technology Systems 1 Water Reducible Polyurethane Enamels
Boeing Aerospace & Electronics /I
Water Reducible Polyurethanes
Candidate Low VOC Topcoat Formulations -
David J. Swanberg [ 0 L) 7 7 '3 - 'f Ys Boeing Defense and Space Group Aerospace Systems Technology Materials and Processes Group
December 6, 1990
PAGE 2
5. OTHER PRECAUTIONS
A. WASH THOROUGHLY AFTER HANDLING AND BEFORE EATING OR SMOKING.
B. CLOSE CONTAINER AFTER EACH USE.
C. HYDROGEN GAS CAN EVOLVE WHEN WATER COMES IN CONTACT WITH ALUMINUM POWDER RESULTING IN A FIRE AND/OR EXPLOSION HAZARD. THIS SITUATION CAN OCCUR WHEN WATER-BORNE PAINT WASTE IS DISPOSED OF IN THE SAME WASTE CONTAINERS AS IS SOLVENT-BORNE PAINTS CONTAINING ALUMINUM PIGMENTS (SUCH AS METALLIC TOPCOATS). TO ELIMINATE ANY POSSIBILITY OF THIS HAZARD, IT IS RECOMMENDED THAT WASTE PRODUCTS FROM THIS WATER REDUCIBLE PRIMER BE KEPT SEPARATE FROM OTHER PAINT WASTE PRODUCTS.
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DEFT., INC.. 17451 VON KARMAN AVENUE, IRVINE. CALIFORNIA 92714 11714) 474.0400
SAFETY PRECAUTIONS
MATERIAL STORAGE
KEEP CONTAINERS TIGHTLY CLOSED AND UPRIGHT TO PREVENT LEAKAGE. DO NOT STORE OR USE NEAR HEAT, SPARKS OR FLAME. STORE ONLY IN WELL VENTILATED AREA.
MATERIAL SPIUGE
REMOVE ALL SOURCES OF IGNITION (FLAME, SPARK, HOT SURFACE, ELECTRICAL, ETC.) AVOID BREATHING VAPORS, VENTILATE AREA. CONTAIN AND REMOVE WITH INERT ABSORBENT AND NON-SPARKING TOOLS.
OPERATOR RESPIRATORY PROJECTION
A. NIOSH APPROVED RESPIRATOR FOR PAINT, LACQUER, ENAMEL MISTS AND ORGANIC VAPORS.
B. USE NEOPRENE (RUBBER, POLYETHYLENE, LEATHER, CANVAS, ETC.) GLOVES TO PREVENT SKIN CONTACT.
C. CLEAN, LONG SLEEVE AND LONG LEG CLOTHING.
D. USE SAFETY EYE WEAR WITH SIDE SHIELDS OR SPLASH GUARDS.
E. AVOID SKIN OR EYE CONTACT.
F.
EMEXGENCY AND FIRST AID PROCEDURES
A. VAPORS - REMOVE FROM EXPOSURE. RESTORE BREATHING. KEEP WARM. NOTIFY PHYSICIAN.
B. SPLASH (EYES) - FLUSH IMMEDIATELY WITH LARGE VOLUMES OF WATER FOR AT LEAST 15 MINUTES. GET MEDICAL ATTENTION.
C. SPLASH (SKIN) - WASH AFFECTED AREAS WITH WATER IMMEDIATELY. REMOVE CONTAMINATED CLOTHING. CONSULT A PHYSICIAN.
MAY - BE A SENSITIZING AGENT OVER A LONG PERIOD OF TIME.
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CONT'D. . . .
DEFT.. INC.. 17451 VON KARMAN AVENUE, IRVINE. CAL!FORNIA 92714 l ( 7 1 4 ) 474-0400
APPLICATION
DEFT'S WATER REDUCIBLE PRIMER CAN BE APPLIED USING CONVENTIONAL AIR, AIRLESS, AND ELECTROSTATIC SPRAY EQUIPMENT. IT CAN ALSO BE APPLIED USING AIR ELECTROSTATIC HANDGUNS WHICH ARE EQUIPPED TO HANDLE WATER BASED COATING SYSTEMS. EXAMPLES OF SUCH AIR ELECTROSTATIC HANDGUNS ARE RANDSBURG REA 111, NORDSON AN-8, AND GRACO AS 4000.
APPLICATION PROPERTIES (TYPICAL):
APPLICATION VISCOSITY INDUCTION TIME POT LIFE DRYING TIME
RECOMMENDED FILM THICKNESS RECOMMENDED AIR PRESSURE
19-21 SECONDS #2 ZAHN CUP NONE 6 H R S . MINIMUM AT 73+2"F SET TO TOUCH - 30 MIN. WITH GOOD AIR CIRCULATION. DRY HARD - 6 HRS. AT 73+2"F. WITH GOOD AIR CIRCULATION. 0.6 - 1.0 MILS DRY FILM 60-80 # ATOMIZATION, l0-12# IN POT 22 OZ PER MIN.
EQUIPNENT CLEANING:
ALL FLUID LINES AND EQUIPMENT SHOULD BE CLEANED WITH DEFT IS-219 REDUCER OR APPROVED EQUIVALENT. FLUID LINES SHOULD BE PURGED BEFORE INTRODUCING WATERBORNE PRIMER. DO NOT USE RECLAIMED SOLVENT WHEN CLEANING EQUIPMENT.
APPLICATION PRECAUTIONS:
1. THE SURFACE TO BE PRIMED MUST BE ABSOLUTELY CLEAN AND FREE OF OIL, DUST, ETC.
2. EQUIPMENT MUST BE ADEQUATELY GROUNDED. CLEAN SPRAY EQUIPMENT IMMEDIATELY AFTER USE.
3. MIX ONLY THAT AMOUNT TO BE USED IN SIX HOURS.
4 . AMINE CURED EPOXY PRIMER FROM ONE VENDOR SHALL NEVER BE MIXED WITH THAT OF ANOTHER VENDORS PRODUCT.
5 . APPLY OVER PRETREATED METAL OR CLEAN FIBERGLASS REINFORCED PLASTIC SURFACE.
Water Reducible Polyurethane Enamels
Boeing Aerospace & Electronics
Aerospace Systems Technology
Regulatory Requirements
Development Objective
Candidate Water-Borne Formulations
Water-Borne Performance
Performance Ratings and Comparisons
Summary
Aerospace
Technology Systems 1 Water Reducible Polyurethane E n a m e l s
/I - Boeing Aerospace & Electronics
Regulatory Requi rements
Driven by ozone forming potential of photochemically reactive organic compounds
The Clean Air Act - US EPA
Regional atmospheric ozone concentrations
Regulate processes (Le. paint booth stack emissions)
Regulate solvent content in coatings
Water Reducible Polyurethane Enamels
Boeing Aerospace & Electronics
Aerospace Systems Technology
Development Objective
Provide durable aerospace coatings with properties and performance equivalent to traditional solvent-borne polyurethane topcoats - esp . MI L-C-83286.
Ultra-low VOC, water-borne or 100% solids
Exterior durability
Exceptional chemical resistance flexibility
Conventional application characteristics
Appearance (gloss) and reasonable cost
Aerospace
Technology Systems 1 Water Reducible Polyurethane Enamels
/I - Boeing Aerospace & Electronics -
Candidate Water-Borne Formulations
Water-borne polyurethanes and polyesters
Water-borne crosslin kers
Carbodiimide Di-functional amine Aziridine
White topcoat formulations - with and without crosslinkers added
Controls
MIL-C-83286 and 1 -Coat
Water Reducible Polyurethane Enamels Boeing Aerospace & Electronics
Aerospace Systems Technology
Product Type Manufacturer
Water- Borne Res ins
. VOC (gmlL)
XW110 Polyurethane Mobay 360 - R-9000 Polyurethane IC1 3 5 72-7230 Polyester Carg i I I 85
Crosslinkers
XL25 S E
BAPP
cx-100
Carbodiimide Union Carbide 5 0 0 (self-emulsified)
Di-finctional Texaco 0 amine
polyaziridine IC1 0 (100% active)
Water Reducible Polyurethane Enamels
Boeing Aerospace & Electronics
Aerospace Systems Technology
Coating T y p e Color VOC (gm/L)
MIL-C-83286 Conventional Gloss Grey 2-comp. polyurethane
2-comp. Polyurethane 1 -Coat High-Solids Gloss White
590
4 1 8
Water Reducible Polyure thane Enamel s Boeing Aerospace & Electronics
Aerospace Systems Technology
Formula Resin voc (g mlL)
1
2
3
Note: All White Topcoat Formulations; PigmeWBinder ratios = .75
XW110 31 5
R-9000 225
72-7230 85
Aerospace Systems 1 Water Reducible PoIyureth.ane Enamels Technology
Formula Resin Crossli n k e r Percent *
// Boeing Aerospace & Electronics
VOC (gm/L)
Table V. Water-Borne Coating Formulations with Crosslinkers
on resin solids
Water Reducible Polyurethane Enamels
Boeing Aerospace & Electronics
Aerospace Systems Technology
T e s t
Low VOC Performance Requirements Low VOC CriterionlGoal
600 Specular Gloss Film Hardness (Pencil Scale)
Gloss - 90+ Camouflage - - 5 H - 2H
Wet Tape Adhesion < 5% loss
Low Temperature Flexibility I no crack, 1" mandrel @ -65 F 1
Impact Flexibility 96 in-lb direct & reverse
De-ionized Water Skydrol 500B
hardness - no change
7 days, no blistering 7 days, film intact,
MIL-H-83232
2 B - HB min. 24 hrs, 160 F, film intact, min. stain,
Aerospace Systems // Water Reducible Polyure thane Enamel s
Formula Thickness 600 Spec Pencil Wet Tape L o w Temperature Flexibil i ty mil Gloss Hardness Adhesion
Technology //
Impact Flexibility in-lb directlrev
/I - Boeing Aerospace & Electronics
I MIL-C- I 2.0 9 2 3H 5 B no cracking
Water-Borne Performance
9 2 83286 l -Coa t
0% removed 1 6 0 2.2 9 3 3H 5 B no cracking 1 6 0
0% removed 160
Formula De-ionized Water Skydrol 500B M I L - H - 8 3 2 8 2
MIL-C-83286 no blistering softening hardness: H-2H hardness: 4B
very light stain hardness: no
no blistering severe softening very light stain I I I '-Coat I hardness: F-H hardness:
Aerospace
Technology Systems 1 Water Reducible Polyurethane Enamels Formula T h i c k n e s s 60' S p e c Penc i l Wet Tape
mil Gloss Hardness Adhesion
Boeing Aerospace & Electronics /I
Low Temperature Impact Flexibility Flexibility in-lb directhev
Water- B orne Perform an ce
I XW110 1 2.3 70 H 5B no cracking 1 6 0 1 0% removed I 1 6 0
R-9000 I 1.8 64 B 4B I hairline cracks I 9 6 72-7230
4% removed 8 0 2.0 85 6B nia nla nla '
Water Reducible Polyurethane Enamels
Boeing Aerospace & Electronics
Aerospace Systems Technology
Formula De-ionized Water Skydrol 5008
Water-Borne Performance (Cont'd.)
MIL-H-83282 7 days, room temp. 7 days, room temp. 24 hours , 1500 F
severe softening
Water Reducible Polyure thane E n a m e l s Boeing Aerospace & Electronics
Aerospace Systems Technology
Water-Borne P e r f o r m a n c e (cont 'd.) General Properties and Flexibility of Water-Borne Coatngs with Crosslinkers Added
Formula T h i c k n e s s 6 O O S p e c Penc i l Wet Tape Low Temperature Impact Flexibility mil Gloss H a r d n e s s Adhesion Flexibility in-lb directlrev
XW11 o/ 2.6 63 H 58 XL25 0% removed XW11 o/ 2.7 70 2H 5B CX100 0% r emoved R-9000/
