Dominik Kohlhoff, Technical Development Transportation ... · BASF Polyurethanes GmbH BBG...
Transcript of Dominik Kohlhoff, Technical Development Transportation ... · BASF Polyurethanes GmbH BBG...
“New Generation PU Material in Window Encapasulation”
Dominik Kohlhoff,Technical Development TransportationBASF Polyurethanes GmbH
BBG Innovation Day 2019
Outline of Presentation
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Short Introduction
Kinetics of PU- Reaction
Material Properties
Material Approval of OEMs
Improved Testing of Material
Conclusion
Short Introduction
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History:
• The actual aromatic systems have been developed already mid 90’s
ELASTOLIT R8919/101/OA48
ELASTOLIT R8919/100/WE35
ELASTOLIT R8919/102/WE45
• At that moment, they were fully fulfilling the requirements, as most
sunroofs had a limited weight of PU
• More recently, more and more large parts (in weight of PU) are
coming into production
This requires longer shot times. Thus, improved flowability/ kinetics
required
Challenge:
• Development of systems having improved flowability for bigger molds,
global recipes, lower emissions, being REACH conform,
and keeping machine parameters at customers` constant
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Kinetics of PU- Reaction
• Tests were conducted using ViskoPakt
by HiTec Zang GmbH
Kinetics of PU- Reaction
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• Flowability of serial material
is limited by increasing
viscosity even before hardening
of material
• Early increase of viscosity
makes higher shot weights and
filling of complex molds difficult
Determined under laboratory conditions
Kinetics of PU- Reaction
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Determined under laboratory conditions
Completely new formulation
with novel raw materials led to
delayed reaction onset
→ viscosity is kept low and
flowability could be improved
Kinetics of PU- Reaction
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ELASTOLIT R 8919/107
ELASTOLIT R 8919/108
ELASTOLIT R 8919/109
ELASTOLIT R 8919/101/OA48
ELASTOLIT R 8919/100/WE35
ELASTOLIT R 8919/102/WE45
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Property Test
method
unit Serial
Material
New
Generation
Moulded
density
ISO 1183-1 Kg/m³ 1060 1060
Shore A ISO 7619-1 - 87 88
Tensile
strength
DIN 53504 MPa 12 13
Elongation DIN 53504 % 215 200
Tensile
modulus
DIN 53504 MPa 28 26
Tear
resistance
ISO 34-1,B
(b)
N/mm 28 27
shrinkage - % 1,25 1,2
Material Properties
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Material Properties
Property unit Serial Material New
Generation
Peel test 7
days
N/cm 88 90
Peel test
after
cataplasm
ageing
N/cm 81 80
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Serial Material
(averaged values):
New Generation
(averaged values):
VOC 200 ppm
FOG 830 ppm
Nonylphenol is detected
VOC 120 ppm
FOG 370 ppm
no Nonylphenol
Material Properties
→ lower emissions and absence of Nonylphenol are nowadays OEM
requirements for new encapsulation projects
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Material Properties
72 144
Wate
rcon
tentin
wt%
96 120
Absorption [h] in Water at 2 °C
Watercontent after absorption in Water (2°C) for Serial Material (dark grey) and New Generation (light grey)
4,5
4
3,5
3
2,5
2
1,51
0,5
0
Material Approval of OEMs
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→ Further OEMs made specific project approvals, evaluate material,
or purchase aliphatic material
Improved Testing of Material
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• Manual testing of start and rise time is conducted
• Precise results for one operator
• Reproducibility for more operators
is lower than in case of automatized testing
• Automatized QM apparatus for outgoing
PU material needed
• Requirement: automatized in-situ stirring and
kinetic testing
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Improved Testing of Material
• Torque meter for kinetic testing already
built up at BASF`s Lemförde site
• Implementation will be done
in 2nd half of 2019
New Generation PU Material
→ global PU systems with improved flowability, reduced emissions,
and REACH conformity were successfully developed
→ OEMs with interest in aromatic material already approved New
Generation material
→ BASF supports customers in questions of material approval at OEMs`
Improved QC Material Testing
→ Novel testing method for quality control was developed
→ Implementation as criterion for outgoing inspection is ongoing
→ BASF supports customers in questions of material testing
Conclusion
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Thank you for your attention!
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