2014 american coating conference reaxis presentation
DESCRIPTION
Development of New Water Soluble Catalysts for Polyurethane Coating ApplicationsTRANSCRIPT
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Development)of)Water<Soluble)Catalysts)for)Polyurethane))
Coa,ng)Applica,ons))
Brandon)Parks,)Reaxis)Inc.)April)8th,)2014)
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Overview)
! !Evalua'on!of!several!novel,!water1soluble,!hydroly'cally!stable,!Sn1,!Bi1,!and!Zn1based!catalysts!– !Curing!proper'es!in!several!2K!WB!PU!formula'ons!!– !Effect!of!rela've!humidity!on!curing!'mes!using!C333W50!!– !NCO/OH!vs!NCO/H2O!selec'vity!using!C333W50!!!– !Curing!proper'es!in!a!solventborne!formula'on!
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Why)Develop)Water<Soluble)Catalysts?)
! !Increasing!market!for!2K!WB!PU!coa'ngs!! !Reduced!VOC!content!of!materials!! !!Decreased!associated!hazards!– !Flammability!– !Insurance!costs!
! !Water!provides!a!non1toxic,!lower!cost,!abundant!solvent!system!
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
2K)WB)PU)Coa,ng)Deficiencies)
! !Elongated!drying!speed!under!humid!condi'ons!
!! !Diminished!film!performance!proper'es!!! !Inferior!appearance!vs.!standard!solventborne!systems!
!
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Kine,c)Curing)Profile)in))a)2K)WB)PU)Formula,on)
0"
0.5"
1"
1.5"
2"
2.5"
3"
0" 1" 2" 3" 4" 5" 6" 7"
Peak"Ra0
o"(2270"/"2935"cm
71)"
Time"(days)"
No Catalyst C333W50 C218 (DBTL) C739W50 C622W78
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Dry)Times)in)2K)WB))PU)Coa,ng)Formula,on)
0"
30"
60"
90"
120"
150"
180"
210"
240"
270"
300"
C739W50" C739E50" C333W50" C333E50" C622W78" C218"(DBTL)"No"Catalyst"
Time"(m
in)" SetAtoATouch"
TackAFree"
DryAHard"
DryAThrough"
PotAlife"
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Color,)Gloss,)and)Physical))Property)Development)
L* a* b* 20° 60°C739W50 90.85 -1.23 1.17 46.1 79.7C739E50 91.05 -1.10 1.41 59.1 82.4C333W50 90.54 -1.36 0.84 59.7 84.2C333E50 90.77 -1.23 1.19 60.3 84.4C622W78 90.94 -1.17 1.30 41.3 78.2
C218 (DBTL) 91.22 -1.12 1.35 64.1 80.3No Catalyst 90.68 -1.16 1.35 50.9 81.6
GlossColorCatalyst
C739W50 F 5B 68C739E50 3H 4B 68C333W50 B 3B 54C333E50 HB 3B 52C622W78 HB 4B 52
C218 (DBTL) HB 5B 48No Catalyst HB 5B 38
Catalyst Pencil Hardness
Cross-Cut Tape
Adhesion
MEK Double Rubs
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Effect)of)Catalyst)Loading)on)Dry)Times)in)a)2K)WB)PU)Formula,on)
0"
30"
60"
90"
120"
150"
180"
0.20%" 0.40%" 0.20%" 0.40%" 0.20%" 0.40%" 0.20%" 0.40%" 0.20%" 0.40%" 0.20%" 0.40%"
C218"(DBTL)" C333E50" C333W50" C739E50" C739W50" C622W78"
Dry"Time"(m
in)"
Set?to?Touch"
Tack"Free"
Dry"Hard"
Dry"Through"
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Effect)of)Rela,ve)Humidity)Using)C333W50)in)a)2K)WB)PU)Formula,on)
0"
50"
100"
150"
200"
250"
50" 75" 90" 50" 75" 90"
C333W50" C218"(DBTL)"
Time"(m
in)"
Rela9ve"Humidity"(%)"
SetBtoBTouch"
Dust"Free"
Dry"Hard"
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
NCO/OH)vs)NCO/H2O))Selec,vity)Using)C333W50)
2.5
2.7
2.9
3.1
3.3
3.5
3.7
3.9
4.1
0 50 100 150 200 250 300
-Ln(
Abs
) (22
70 c
m-1
)
Time (min)
C333W50 - Water
C333W50 - Butanol
Krel = 6.7
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Solventborne)Curing)Proper,es)
6.2$
4.8$ 7.8$ 75.94$
17.0$
8.1$
9.6$
406.88$
36.5$
9.6$
11.1$
526.25$
57.9%
17.0%
17.7%
0$
60$
120$
180$
240$
300$
360$
420$
480$
540$
600$
660$
720$
C739E50$ C333E50$ C218$(DBTL)$ No$Catalyst$
Dry$Times$(m
in)$
SetBtoBTouch$
TackBFree$
DryBHard$
DryBThrough$
>%720.0$
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Conclusions)
! !Several!water1soluble,!hydroly'cally!stable,!Sn1,!Bi1,!and!Zn1based!catalysts!have!been!developed!
! !Catalysts!demonstrate!excep'onal!rates!of!drying!and!good!color,!gloss,!and!physical!property!development!in!both!waterborne!and!solventborne!systems!
! !C333W50!shows!excellent!curing!'mes!under!high!humidity!condi'ons!and!high!levels!of!NCO/OH!selec'vity!
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Future)Studies)
! !Catalyst!stability!and!shelf1life!in!“Part1A”!– !Balancing!reac'vity!with!shelf1life!
! !Heat1ac'va'on!of!catalysts!(“ac'vated!cure”)!
! !Expansion!NCO/OH!vs.!NCO/H2O!!catalyst!selec'vity!
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Thanks)For)Your)A\en,on!)
! !!Visit!us!at!exhibit!booth!#1756!!!! !Want!more!informa'on?!Check!us!out!online!at!www.reaxis.com!!
! !Ques'ons?!
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Waterborne)Formula,on)A)
Material Weight (g)
Water Letdown 6.7
Catalyst 0.0375
Water-Dispersable,
Aliphatic Polyisocyanate
(HDI)
10.00
Urethane Modified
Polyester Polyol25.0
Weight % Solids NCO:OH
45.00 2.00
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Waterborne)Formula,on)B)–)Polyester)Polyol)Dispersion)
Material Weight (g) Weight Solids (g)
Rutile TiO2 Pigment 65.31 65.31
Rheological Modifier 0.86 2.15
Dispersant 2.3 1.04
Flow Modifier 3.4 0.10
Water 71.22 0
Catalyst 0.018-0.020 0.018-0.020
Total 361.36 154.39
82.2
Defoamer 3.8 3.59
Polyester Polyol Dispersion 205.5
3:1 Water-Dispersable, Aliphatic
Polyisocyanate (HDI) in EEP
8.97 -
Weight % Solids NCO:OH
42.72 1.10
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Waterborne)Formula,on)C)–)Water<Reducible)Polyester)Polyol)
Material Weight (g) Weight Solids (g)
Wetting Agent 4.4 3.16
Water Letdown 641.3 0
Catalyst 0.08 or 0.16 0.08 or 0.16
Total 1426.7 615.71
10% Aqueous Ammonia Solution 23.4 0
Water-Dispersable, Aliphatic
Polyisocyanate (HDI)462.0 346.53
Water-Reducible Polyester Polyol 295.6 266.02
Weight % Solids NCO:OH
43.16 1.4-1.15
American)Coa,ngs)Conference,)Atlanta)GA,)2014)
Waterborne)Formula,on)D)–)Urethane)Modified)Polyester)Polyol)
Material Weight (g) Weight Solids (g)
Wetting Agent 1.93 1.55
Water Letdown 23.47 0
Catalyst 0.17 0.08
Total 199.84 90.54
Water-Dispersable, Aliphatic
Polyisocyanate (HDI)42.95
Urethane Modified Polyester Polyol 131.32 45.96
42.95
Weight % Solids NCO:OH
45.31 2.00