Data Sheet

Technical Data Sheet
LOCTITE
®
4204™
March-2010
PRODUCT DESCRIPTION
LOCTITE
®
4204™ provides the following product
characteristics:
Technology Cyanoacrylate
Chemical Type Ethyl cyanoacrylate
Appearance (uncured) Colorless to slightly pale yellow
homogeneous liquid
LMS
Components One part - requires no mixing
Viscosity High
Cure Humidity
Application Bonding
Key Substrates Rubbers, Plastics and Metals
LOCTITE
®
4204™ is a general purpose adhesive suitable for
applications where heat resistance is required. LOCTITE
®
4204™ is toughened with elastomers for flexibility, impact
resistance and improved resistance to heat and humidity.
TYPICAL PROPERTIES OF UNCURED MATERIAL
Specific Gravity @ 25 °C 1.1
Viscosity, Brookfield - RVT, 25 °C, mPa·s (cP):
Spindle 5, speed 20 rpm, 2,000 to 6,000
LMS
Viscosity, Cone & Plate, 25 °C, mPa·s (cP):
Physica MC100, Cone MK 22, shear rate 100 s
-1
180 to 600
LMS
Flash Point - See SDS
TYPICAL CURING PERFORMANCE
Under normal conditions, the atmospheric moisture initiates the
curing process. Although full functional strength is developed
in a relatively short time, curing continues for at least 24 hours
before full chemical/solvent resistance is developed.
Cure Speed vs. Substrate
The rate of cure will depend on the substrate used. The table
below shows the fixture time achieved on different materials
at 22 °C / 50 % relative humidity. This is defined as the time to
develop a shear strength of 0.1 N/mm².
Fixture Time, seconds:
Steel (degreased) 120 to 150
Aluminum 5 to 10
ABS 30 to 45
SBR (smooth) 90 to 105
NBR 10 to 20
EPDM 150 to 180
Phenolic 20 to 30
Zinc dichromate 25 to 35
Neoprene 30 to 45
PVC 150 to 180
Polycarbonate 45 to 60
G-10 Epoxy 5 to 10
Wood (pine) 105 to 210
Rubber, nitrile 10 to 20
Cure Speed vs. Bond Gap
The rate of cure will depend on the bondline gap. Thin bond
lines result in high cure speeds, increasing the bond gap will
decrease the rate of cure.
Cure Speed vs. Activator
Where cure speed is unacceptably long due to large gaps,
applying activator to the surface will improve cure speed.
However, this can reduce ultimate strength of the bond and
therefore testing is recommended to confirm effect.
TYPICAL PERFORMANCE OF CURED MATERIAL
Adhesive Properties
Cured for 24 hours @ 22 °C
Lap Shear Strength, ISO 4587:
Steel (grit blasted) N/mm² 17.2 to 19.3
(psi) (2,490 to 2,800)
Aluminum N/mm² 14.3 to 15.9
(psi) (2,070 to 2,300)
SBR N/mm² 0.9 to 1.0
(psi) (130 to 145)
Nitrile N/mm² 0.8
(psi) (115)
Neoprene N/mm² 0.7
(psi) (110)
Block Shear Strength, ISO 13445:
ABS N/mm² 18 to 20
(psi) (2,610 to 2,900)
Phenolic N/mm² 16.8 to 17.4
(psi) (2,440 to 2,520)
G-10 Epoxy N/mm² 16 to 21
(psi) (2,320 to 3,045)
Polycarbonate N/mm² 3.1 to 3.4
(psi) (450 to 490)
PVC N/mm² 4.8 to 7.7
(psi) (700 to 1,120)
Cured for 24 hours @ 22 °C, followed by 24 hours @ 121 °C, tested
@ 121 °C
Lap Shear Strength, ISO 4587:
Steel (grit blasted) N/mm² ≥5.6
LMS
(psi) (≥810)
Cured for 24 hours @ 22 °C, followed by 24 hours @ 121 °C, tested
@ 22 °C
Lap Shear Strength, ISO 4587:
Steel (grit blasted) N/mm² ≥18.6
LMS
(psi) (≥2,700)