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10/2010
2-component Construction Adhesives
DELO-AUTOMIX, DELO-DUOPOX, DELO-PUR
AIPI – Milano, 15 May 2014
DELO – Stefano Farina
10/2010
� Product description
� Application areas
� Reaction mechanism
� Processing
� Adhesive properties
� Dispensing
Contents
10/2010
Two-component construction adhesives
� DELO-DUOPOX Two-component, room-temperature-curing epoxy resinsas casting resins, adhesives or trowelling compounds
� DELO-PUR Two-component, room-temperature-curing polyurethanesas adhesives or casting resins
Properties:
� High-strength
� Flexible to tough-hard
� Can be used as construction adhesive in large layers
� Good resistance to many media
� Temperature of use up to 140 °C
10/2010
Processing and container types
� DELO-AUTOMIX DELO-DUOPOX or DELO-PUR adhesivesin 50 ml or 200 ml double chamber cartridges
� 1 kg tins / hobbocks of different sizesDELO-DUOPOX or DELO-PUR adhesives for manual or processing from 2C mixing systems
� 1 kg tins DELO-DUOPOX trowelling compounds for manual mixing
� Portion packagesDELO-DUOPOX 01 rapid; fast-curing epoxy resin formanual mixing in small quantities
10/2010
2C adhesives and casting resins in use
10/2010
Curing of epoxy resins
� Epoxy resins contain an epoxy ring as functional group
� When adding the hardener, the epoxy ring is opened while forming a hydroxyl group
� The reaction speed is mainly dependent on the hardener used
H H H Hl l l l
– C – C – H + H – X →→→→ – C – C – X\ / l lO HO H
Epoxy ring Hardener Hydroxyl group
10/2010
Hardeners for epoxy resins
Reaction partner Functionalgroup
Reactivity Application area DELOproducts
Thiol bond -SH fast reaction for fast-curing2C epoxy resins
01 rapid02 rapid03 rapid03 rapid thix
Aliphatic aminese. g., Triethylene tetramine
Diethylene triaminePolyaminoamide
-NH2 slow reaction for slow-curing2C epoxy resins
DUOPOX
10/2010
Curing of polyurethanes
For the formation of polymers for adhesives, urethanes with 2 functional groups are used.
H H H Hl l l l
–C–N–R1–N–C–O–R2–O–C–N–R1–N–C–O–R2–O– …ll ll ll llO O O O
O=C=N–R1–N=C=O + HO–R2–OH +
+ O=C=N–R1–N=C=O + HO–R2–OH + …
Polyurethane
Diisocyanates Diols
10/2010
Reaction with air humidity
Isocyanates react with water, e. g., with air humidity
� Special blister packages to protect the cartridges from humidity
R–N=C=O + H–OH � R–N–C–OHl ll
H O
Isocyanate
R–N–C–OH � R-NH2 + CO2l llH O
Substitutedcarbamine acid
Amine
10/2010
Significance of the mixing ratioB
on
d s
tren
gth
Mixing ratio acc. todata sheet
Mixingration
Goal:
Maintenance of the mixing ratio with an accuracy of ± 5 %
10/2010
Terms for the curing process
„Pot life“
Mixingof the
components
Processingtime /
Pot life /
Gel time
Time line
Str
engt
h
1 MPa
10 MPa
10/2010
Heat development / quantity prepared
DELO-DUOPOX 02 rapid
DELO-DUOPOX 6747 (casting resin)
10/2010
Curing – Acceleration by heat
0
2
4
6
8
10
12
14
16
18
15 min 30 min 45 min 60 min 24 h
Ten
sile
she
ar s
treng
th [M
Pa]
RT60 °C80 °C
DELO-PUR 9694
Determination of the tensile shear strength after storage at different temperatures
Tensile shear strength Al/Al, EN 1465, 0.2 mm distance, sand-blasted
10/2010
Temperature stability
Comparison of 1C and 2 C epoxy resin adhesives
0
5
10
15
20
25
30
35
40
0 20 40 60 80 100 120 140 160 180 200 220
Temperature T [°C]
Te
nsi
le s
he
ar
stre
ng
th [M
pa
]
DELO-MONOPOX 1196
DELO-DUOPOX 1895
DELO-DUOPOX 02 rapid
10/2010
Chemical resistance
DELO-DUOPOX AD895
Long-term resistance in dependence of different aging conditions
DIN EN 1465, curing for 72 h at rt, specimen material: aluminum, sand-blasted
0
5
10
15
20
25
30
72 h rt 6 monthsclimate
12 monthsclimate
1000 h 85/85
1000 h 100 °C
1000 h 150 °C
10000 h 140 °C
Te
nsi
le s
he
ar
stre
ngth
[MP
a]
10/2010
DELO-AUTOMIX System
This is how it is done:
� Insert the cartridge into the dispensing gun
� Remove the closure cap from the cartridge
� Attach the mixing tube
� Abandon the first content of the mixing tube to equalize possible fill level differences of the cartridge
� Leave the mixing tube on the cartridge
� after dispensing
� Attach a new mixing tube for dispensing after a longer break
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