Transcript Addolink TT Isocyanate Crosslinker - Tri

Addolink® TT
Isocyanate Crosslinker
Rhein Chemie
Engineering Plastics Additives
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Addolink® TT
Chemistry
NCO
O
H3C
N
OCN
N
CH3
NCO
ΔT
2 NCO
O
Addolink TT
NCO content
Melting Point
CH3
2,4-TDI
24 %
140 °C (285 °F)
48 %
13 °C (55 °F)
TT provides two isocyanate functions
ready for encapsulating or other reactions
At elevated temperature (> 140°C) TT splits up in two molecules of TDI
two more isocyanate groups for strong bonding to substrate
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Eiben
Engineering Plastics
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Addolink TT
Splitting Up TGA
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Engineering Plastics
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Addolink TT
Applications
Tire Dip: Adhesion Promoter for Rubber Bonding to Polyester Fabric
Urepan® and Millathane® Millable Polyurethane: Crosslinker for TDI systems
Polyurethane (usually without TT split up)
Coating and Adhesives
Dispersions
One component systems
One Component Elastomers
PVC: Adhesion Promoter for PVC Bonding to Fabric
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Eiben
Engineering Plastics
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Addolink TT
PVC Adhesion Primer
Application: PVC coating on fabric
Adhesion primer formulation
pbw
PVC Plastisol
100
plus
TT paste 50% in Plastiziser
3-6
Bonding Agent TN/N
3-5
or plus
TT paste 50% in Plastiziser
2,9-5,7
Bonding Agent TN/S 50
4-8
Bonding Agent TN: Lanxess
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Eiben
Engineering Plastics
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Addolink TT
PVC Coating Process
1. Primer coating
Peeling Strenght
about 120 grams per square
meter
180
Primer pre-gelling @ 120 °C
140
160
120
N/5cm
2. Top coating
without adhesion promoter
80
60
one or two passes with
pregelling each pass
40
20
0
3. Curing @ about 180 °C
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100
without adhesion primer
Eiben
Engineering Plastics
with TT/TN primer
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Addolink TT
Tire Dip
Application: Rubber to Polyester (PET) Cord Bonding
Tires, conveyor belts, driving belts
Adhesion Promoter: RFL Dip
Resorcinol Formaldehyde Latex Dispersion
Single Dip with RFL / Addolink TT dip or
Pre Dip with Addolink TT solution
Processing
wet cord thoroughly
squeeze off
dry
coated cord is shipped to tire maker
PET plus Rayon / PA plus steel cord reinforces tires, vulcanization utilizes TT split
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Engineering Plastics
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Addolink TT
PU One Component Systems
Common PU Cold Cast Elastomers but
with Long Potlife or One Component Processing
Formulation
Long chain polyether or aminopolyether
amine crosslinker like DETDA or glycolic crosslinker
encapsulating aliphatic amine
Addolink TT
catalyst, anti precipitation agents etc.
Storage stable for months
Cures @ 100 to 140 °C
[ April 2007 ]
Eiben
Engineering Plastics
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