hydrocarbon tackifiers for propylene based elastomers
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1
April 29, 2014
2014 Adhesive and Sealant Conference
Orlando, FL
Ranjan Tripathy
Senior Research Chemist
Hydrocarbon tackifiers for
propylene-based elastomers
2
ExxonMobil Chemical is committed to
adhesives industry leadership
• Investing
in the world’s largest hydrogenated
hydrocarbon resin unit to supply
customers needs for Escorez™
tackifying resins
• Innovating
with new products like Vistamaxx™
performance polymers made with
proprietary metallocene catalysts
• Leveraging
our expertise in polymers and
tackifying resins to optimize
product synergies
2
Propylene
Crystallinity
Ethylene
Crystallinity
PE
Mo
lecu
lar
Weig
ht
Vistalon
EPDM
rubber Exact
Plastomers
PP Vistamaxx
performance
polymers
Lower Crystallinity/Density
Vistamaxx
polymers
In Adhesives
Achieve™ Exceed™
Enable™
mPE
VistamaxxTM polymers enable unique
approach for formulating HMAs
3
Hydrogenated resins and metallocene
polyolefins (mPO) drive market growth
• HMA demand growing at 4%
• Conventional HMA steady growth
• Wide market appeal
• Proven fit for use
• Premium packaging and nonwovens
rely on hydrogenated (H2) resin
• H2 resin and mPO drive growth
through value
• Improved stability
• Low color and odor
• Reduced usage
0
400
800
1,200
1,600
2,000
1996 2000 2004 2008 2012 2016 2020
kt Hot Melt Industry Growth (Adhesive Volumes)
Conventional C5/C9 or RE +
HEVA, APAO
Premium H2 resin +
mPO, SBC, HEVA
HMA Growth ‘13-’20: 4%
2%
Source: ExxonMobil estimates and publicly available data
4
Packaging HMA Polymer Tackifier Wax/
Other
Adhesion Freezer Adhesion Heat resistance Set time
Nonwovens HMA Polymer Tackifier Wax/
Other
Initial Peel Adhesion Aged Peel Adhesion Applicator
Product Assembly HMA Polymer Tackifier Wax/
Other
Open time Broad adhesion Heat Resistance
Polymer and tackifier define key HMA
performance attributes
5
5
Packaging formulations using VistamaxxTM
performance polymers
0%
20%
40%
60%
80%
100%
EVA mPE VistamaxxPolymers
Wei
ght
% o
f A
dh
esiv
e
Polymer
H2 Tackifier
Wax
Preferred tackifiers enhance adhesion
and heat resistance
• Low viscosity Vistamaxx polymers
enable high polymer loading
• Higher polymer level favors higher
efficacy additives
• Tackifying resin selection contributes
to final properties even at lower load
• Adhesion
• Heat resistance
Set time
Adhesion atRT
HeatResistance
Escorez™ tackifier 1
Escorez™ tackifier 2
Escorez™ tackifier 3
6
Preferred tackifiers for HMA having Vistamaxx™
performance polymer for packaging
• Moderate softening point and aromaticity
enhance adhesion when combined with
Vistamaxx polymers
• Liquid and polar tackifiers have limited
compatibility with Vistamaxx polymers
• Composition of preferred tackifiers for
Vistamaxx polymers
• Improves adhesion
• Improves heat resistance
Softening point (° C)
Aro
mat
ic m
ole
%
Adhesion Performance
RT Fiber Tear
80% < FT > 60%
FT> 80%
optim
ized
Escorez TM Tackifiers
0
15
30
45
60
75
E50
00
H2
1
E50
00
H2
2
E50
00
H2
3
E50
00
H2
4
E50
00
H2
5
EXP
4
EXP
3
EXP
2
EXP
5
EXP
5
PAFT
( °
C )
Experimental Tackifiers
7
Nonwovens formulations using VistamaxxTM
performance polymers
Preferred tackifiers improve stability over
the lifetime of the bond
0%
20%
40%
60%
80%
100%
SBC mPE VistamaxxPolymers
Wax
Wei
ght
% o
f A
dh
esiv
e
Polymer
H2 Tackifier
Oil
• Low viscosity Vistamaxx polymers
enable high polymer loading (50-80%)
• 2X polymer vs. alternatives
• Broad array of compatible tackifiers
• Composition influences adhesion
0
40
80
120
160
E50
00
H2
a
E50
00
H2
b
E50
00
H2
c
H2
C9
styr
en
e t
erp
en
e
H2
Alip
hat
ic/C
yclic
Pe
el a
dh
esi
on
(g)
Initial Peel
Aged Peel
ExxonMobil TM Tackifiers
8
0
20
40
60
80
100
120
140
160
0
20
40
60
80
100
120
140
160
Solubility parameter of tackifier
Escorez TM
tackifiers a
Preferred tackifiers for HMA having Vistamaxx™
performance polymer for nonwovens
Minimum Maximum
Init
ial P
eel a
dh
esio
n (
g)
Age
d P
eel a
dh
esio
n (
3 m
on
th, g
)
• Increased tackifier solubility decreases degree of freedom improving bond stability
• Lower tackifier solubility increases degree of freedom compromising bond stability
Escorez TM
tackifiers a
Escorez TM
tackifiers b
Escorez TM
tackifiers b
Escorez TM
tackifiers c
Escorez TM
tackifiers c
9
9
0%
20%
40%
60%
80%
100%
EVA APO VistamaxxPolymers
Wei
ght
% o
f A
dh
esiv
e
Polymer
Tackifier
Adhesion promoter
Typical Unfilled Assembly HMA Formulations
Wax
Assembly formulations using
VistamaxxTM performance polymers
Preferred tackifiers selected to
balance open time and heat
resistance
• Low viscosity Vistamaxx polymers
enable high polymer loading (70-90%)
• Tackifying resin influences open time
0
20
40
60
80
100
0
10
20
30
40
50
E50
00
H2
1
E50
00
H2
2
E50
00
H2
3
EXP
3
EXP
5
EXP
2
SAFT
(
C)
Op
en T
ime
(%
su
bst
rate
rem
ain
ing
at
20
s)
Experimental Tackifiers
Escorez TM Tackifiers
10
10
Preferred tackifiers for HMA having Vistamaxx™
performance polymer for assembly
Softening point (° C)
Aro
mat
icit
y %
Softening point (° C)
Aro
mat
icit
y %
• Moderate softening point and aromaticity
improve open time
• AP %: 4-9
• SP: 100-115 °C
• Composition of preferred tackifiers for
Vistamaxx polymers
• Slows crystallization
• Improves open time
• Improves broad adhesion performance
• Retain heat resistance
%
Escorez TM tackifiers Performance
RT Open time (10 s)
EXP H2 tackifiers Performance
RT Open time (20 s)
%
% Substrate Remaining
FT > 40%;
20% < FT> 40%
% Substrate Remaining
FT > 40%;
20% < FT> 40%
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Raising the standard
• ExxonMobil’s Adhesion business vision
• Leveraging our technology expertise
• Innovating for better customer solutions
• Investing to support customer growth
Be the preferred global supplier of polymers and tackifiers to
the hot-melt adhesive industry
12
Disclaimer
12
©2014 ExxonMobil. ExxonMobil, the ExxonMobil logo, the interlocking “X” device and other product or service names used herein are
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may not copy this document to or reproduce it in whole or in part on a website. ExxonMobil does not guarantee the typical (or other) values.
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12
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Adhesive Testing Methodology upon request
Property ExxonMobil Test Method* Unit
Softening Point ETM-LNX-02* °C/(°F)
Shear Adhesion Failure Temperature (SAFT) ETM-LNX-12* °C/°F)
Peel testing for initial and aged adhesion HMA-12* psi
Adhesion Dot Test (fiber tear) ETM-LNX-11* %
Aromaticity ETM E-50 (1) * %
Peel Adhesion Failure Temperature (PAFT) ASTM D-4498 °C/°F)
* ExxonMobil Test Methods, some of which were developed from ASTM text methods, are available upon request.
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