Polycarbonate diol - Tecnologia de Materiais

Transcripción

Polycarbonate diol
Improving polyurethane durability
in adhesives, coatings and
pavements
Daniel Hernandes
Sales Executive
November 8th, 2012
1
OUTLINE
1.
Introduction: Polycarbonate diol
2.
High-performance of PUD due to polycarbonate diol: Adhesives
3.
High-performance of PUD due to polycarbonate diol: Coatings
4.
High-performance of polycarbonate diol-based pavements
5.
Conclusions
2
OUTLINE
1.
2.
3.
4.
5.
Conclusions
3
Polyols used in the synthesis of PU
Terminal – Backbone – Bridge – Backbone – Terminal
Polycarbonate diol
lower reactivity
Polyester diol
poor hydrolysis resistance
Polyether diol
low radical oxidation stability
Advantages of polycarbonate diol: Carbonate vs. ester & ether as bridge
 Excellent hydrolytic stability
 High thermal stability
 High chemical resistance
 Good properties at low temperature
 Improved durability
 High mechanical properties
4
Advantages provided by polycarbonate
 As PUD, Environmentally friendly
 As PUD, obey VOC regulations: Directive 2004/42/CE of the European Parliament and Council
 Similar
application procedure than for traditional polyols-based polyurethane coatings and
adhesives.
 Good elasticity under deformation
 Good durability and transparency
 Excellent scratch and abrasion resistance
 Uniform and free of defects coatings
 Good chemical resistance
5
Leather finishing
Artificial leather
Flooring
Wood coating & paints
Automotive
Automotive finishing
Main applications of polycarbonate diol-based PU as adhesives, coatings and
pavements
6
7
Waterproof membranes
Footwear
Pavements
Bioadhesives
Inks
Adhesives
Main applications of polycarbonate diol-based PU as adhesives, coatings and
pavements
Polyols used in this work
Polycarbonate diol
Grade
R:R’
Ratio
Homopolymer
UH
1,6-hexanediol
-
Copolymer
PH
1,5-pentanediol : 1,6-hexanediol
1:1
Copolymer
BH
1,4-butanediol : 1,6-hexanediol
7:3 & 9:1
Copolymer
UPH
1,3-propanediol : 1,6-hexanediol
1:1
Copolymer
UM
1,4-Cyclohexanedimethanol : 1,6-hexanediol
1:3, 1:1 & 3:1
Copolymer
UHC
e-caprolactone : 1,6-hexanediol
1:1
Copolymer
UT
Polyether : Polycarbonate
-
Polyester diol
R:R’
Ratio
1,4-butanediol adipate
1,4-butanediol : 1,6-hexanedioic acid
1:1
Polycaprolactone diol
e-caprolactone
-
Polyether diol
Polytetramethylene glycol
Polypropylene glycol
8
OUTLINE
1.
2.
3.
4.
5.
Conclusions
9
Solventborne PU solutions vs. waterborne PU dispersions
Solvent-borne coatings
VOC regulations
Environmentalfriendly
coatings??
Waterborne polyurethane
dispersions (PUDs)
10
Synthesis of PUD – Acetone method
Isocyanate
Diol
NCO
+
HO
Emulsifiers
OH
+
HO
POLIOL
Poliadipato de
1,4 butanodiol
OCN
IPDI
+
OH
COOH
HO
DEG
OH
DMPA
1.
1.SÍNTESIS
SÍNTESISDEL
DELPREPOLÍMERO
PREPOLÍMERO
T = 80°C, V agitación =450 rpm
T = 80ºC, Vagitación= 200 rpm
PREPOLÍMERO
NCO
2. DISOLUCIÓN DEL PREPOLÍMERO EN ACETONA
OCN
T = 45-50°C, V agitación =450 rpm
Chain extender
2. DISOLUCIÓN DEL PREPOLÍMERO EN ACETONA,
T = 45-50ºC, Vagitación= 600 rpm
3. NEUTRALIZACIÓN CON TEA
3. TNEUTRALIZACIÓN
CON
= 45-50°C, V agitación =450
rpmTEA,
T= 45-50ºC, Vagitación= 600 rpm
4.
HIDRACINA
4.EXTENSIÓN
EXTENSIÓNDE
DECADENA
CADENACON
CON
HIDRACINA,
1.
T = 45-50°C, V
T = 45-50°C, V
agitación
=450 rpm
=450 rpm
T ambiente, Vagitación
agitación= 600 rpm
5. ADICIÓN DE AGUA,
5. ADICIÓN
T
, DE
V AGUA
= 800 rpm
ambiente
agitación
T = 45-50°C,
V agitación
=900 rpm
DISPERSIÓN DE POLIURETANO EN AGUA/ACETONA
6.
DE LALA
ACETONA
6.TDESTILACIÓN
DESTILACIÓN
1.
= 45-50°C, V agitación DE
=450 rpmACETONA,
T=T
50°C,
P = 300mbar
= 50ºC,
P= 300 mbar
DISPERSIÓN ACUOSA DE POLIURETANO
11
Neutralizer
Waterborne PU dispersions: Curing process
12
Adhesives – T-peel test
PVC
PUD
PVC
CA: Cohesive failure in
the adhesive
A: Adhesion failure
13
Adhesives – T-peel test Comparative Polycarbonate/Polyether/Polyether
T- peel strength (kN/m)
A: Adhesion failure
A
CA: Cohesive failure in
the adhesive
CA
A
UH100-based
adhesive
PTMG-based
adhesive
14
1,4-BDL adipatebased adhesive
Adhesives – Ageing, as variation of cross-cutter adhesion test
PUD (fresh: 200 µm)
Stainless steel 304
Stainless steel 304
15
Code
Description
Damaged surface
0
No modification
-
1
Light loosening of
coating (< 5 %)
2
Light loosening of
the borders of the
coating
(5 to 10 %)
3
Partial loosening of
the coating
(15 to 35 %)
4
Strong loosening of
the coating
(35 to 65 %)
5
Very strong
loosening of the
coating
(> 65 %)
-
Trends:
i.
Molecular weight:
No dependence, but UH200 & UH300
ii.
Homopolymer vs. copolymer:
No dependence
16
Polycarbonate
diol PUD - based
No
modification
Polypropylene
Glycol PUD based
Light loosening
of the borders of
the coating
17
Polycaprolactone
PUD - based
Loosening of
the coating
OUTLINE
1.
2.
3.
4.
5.
Conclusions
18
Coatings – Chemical resistance
PUD (fresh: 200 µm)
Stainless steel 304
10 min
Ethanol
Stainless steel 304
19
Code
Damaged Surface
5
Intact coating
4
Slight change in gloss or
color
3
Light mark
2
Strong mark
1
Coating removal
Coatings – Chemical resistance of coatings based on Polycarbonatediol vs.
polyester diol vs. polyether diol
PTMG-based PUD
1,4-BDL adipate-based PUD
Code
Damaged Surface
5
Intact coating
4
Slight change in
gloss or color
3
Light mark
2
Strong mark
1
Coating removal
20
UH100-based PUD
Coatings – Yellowness index
Yellowish
Colourless
CIE 1931 color space chromaticity diagram
21
Coatings – Ageing, as increment of yellowness index and retention of thickness
Heat resistance: ISO 3248:1998 (15 days @ 120 ºC)
UH100-based
PUD
PPG-based
PUD
22
1,4-BDL adipatebased PUD
Coatings – Ageing, as increment of yellowness index
Increment (%)
Increment of yellowness index
1500
1250
1000
750
500
250
0
Polycarbonate diol grade
Increment of yellow index on oak wood (%)
35
30
25
UH100
20
UH200
15
Polyether
10
Polyester
5
0
0
5
10
15
23
20
Coatings – Ageing, as retention of thickness
Artificial weathering: ISO 11507:4892-3 (Cycle H)
Blistering
UH100-based
PUD
PPG-based
PUD
24
Loss of
thickness
1,4-BDL adipatebased PUD
OUTLINE
1.
2.
3.
4.
5.
Conclusions
25
Pavement – Chemical resistance
Polyester
based
pavement
Blistering
50%
Polycarbonate
diol + 50%
Polyester
based
pavement
Test conditions: Direct contact, 24h @ 23 ºC, 50% R.H.
26
Blistering
Blistering
Pavement – Improvement of mechanical properties
Pavement
Pencil hardness
(ISO 15184)
Persoz hardness
(ISO 1522)
Abrasion
resistance
(lost mg / 100
cycles, ISO 5470)
32
Polyester
6B
19
12
Polycarbonate
diol-based
4B
36
27
Pavement – Hydrolysis resistance
Variation of Tensile strenght (%)
0
0
-10
-20
Variation of Elongation at break (%)
Polyester
Polycarbonatodiol +
Polyester
-10
Polyester
-20
-30
-30
-40
-40
-50
-50
-60
-60
-70
-70
-80
-80
-90
-90
-100
-100
Test conditions: Water immersion, 80ºC for 32 days; ISO527
28
Polycarbonatodiol +
Polyester
OUTLINE
1.
2.
3.
4.
5.
Conclusions
29
Using polycarbonate diol, we can conclude about durability that …
Adhesives based on polycarbonate diol show:
 Enhanced retention of initial adhesion properties after ageing
Adhesives
 No losses of adhesion
Coatings based on polycarbonate diol show:
 Better retention of initial mechanical properties after ageing
 Lower yellowness increment
Coatings
 Less thickness losses
 Minor blistering
Pavements including polycarbonate diol show:
 Improved resistance to automotive chemicals
Pavements
 Enhanced abrasion resistance
 Better retention of initial mechanical properties after hydrolytic ageing
30
Acknowledgments
Laboratory of Adhesion and Adhesives (University of Alicante, Spain)
for synthesis and experimental characterization of the PUDs and polyurethane
adhesives.
31
Thanks for your attention !!
For more information:
Daniel Hernandes
[email protected]

Polycarbonate diol - Tecnologia de Materiais

Transcripción

Documentos relacionados

111024 CYTED-IBERQUIMIA_pptx

Rotor Gastronom GK900 - Rotor Lips International

8mm Twinwall - Brett Martin

5 PRESENTACIONES DE NEGOCIOS GRATUITAS DE LOS

Rotor Gastronom GT900 / GT600