Technical Information
EP Epoxy Resins
Bakelite EPR 04572
Three component epoxy resin system
Characteristics
Properties
Unit
EPR 04572
EPH 04572
Viscosity at 25 °C
mPa·s
15000 ± 1000
240 ± 40
Epoxy equivalent
Anhydride
equivalent
g/equiv.
g/equiv.
160 ± 3
Properties
Viscosity at 25 °C
Unit
mPa·s
EPC 04572
250 ± 20
178
EPC 865
260 ± 50
EPM 05288
1000 ± 250
Applications
Bakelite ® EPR 04572 with the anhydride hardener Bakelite ® EPH 04572 and the
accelerator Bakelite ® EPC 04572 is a low viscosity hot curing epoxy resin system
suited to the production of composite fibre components using the Filament Winding
technique and Pultrusion. The moulding materials made with the EPR 04572 matrix
possess good electrical and mechanical characteristics with good thermoforming
stability and thermal to ageing stability.
For Pultrusion we recommend to use between 2.0 and 3.0 % of an internal release
agent, for example Bakelite ® EPM 05288.
Instead of Bakelite ® EPC 04572 can be used as accelerator Bakelite ® EPC 865. As a
result the processing time will be longer by comparable reactivity.
The fracture mechanical properties of this standard epoxy resin system can be
significantly improved by adding the toughened epoxy resin EPR 05399.
Shelf Life
In sealed containers at 20 - 25 °C - 12 months.
page 1/ 5 ... area: ATE-E1 ... created: 04/97... edit date: 02/05
All information, recommendations and suggestions provided by Bakelite AG in the form of verbal or writ ten communication, or in pertinent data bases, represent our best
knowledge and experience. Such data are non-binding in character, and do not represent, either explicitly or implicitly, assurances or a gua rantee of specific properties.
The specified parameters merely represent typical data; they do not form a basis for either a guarantee or a specification. The information, recommendations and
suggestions we provide describe our products and possible applications in general or exemplary terms; they do not rela te to specific cases. The process of constant
continued development and improvement of our products can lead to changes in pertinent parameters, texts and illustrations; no s pecial mention is made of pos sible
alterations. Our technical advice does not free the customer of its responsibility to verify our current information, in particular our technical data sheets, safety data sheets
and technical information leaflets. The customer will conduct its own tests of our products to determine their suitability for the intended pro cesses and uses, as well as to
establish that their processing properties are appropriate in the pertinent situation, since our products may be used in a wide range of technical applications that involve
very dif ferent requirements according to the specific situation. Therefore, such specific cases are outside our control, and are the excIusive responsibility of the customer.
A pertinent agreement is necessary in case a binding assurance of specific parameters is required. Customers and users of our products must them selves observe
possible patent rights, existing legislation and regulations. This publication does not represent a license, nor does it authorize infringement of any type of patent. Note:
This version superse des and replaces all previous publications on this subject. Bakelite® is a registered trademark of Bakelite AG in Europe. Rütaphen ® is a registered
trademark of Bakelite AG in the United States and Canada.
Technical Information
EP Epoxy Resins
Bakelite EPR 04572
Impregnation
Depending on precise requirements the amount of EPC 04572 accelerator used can
vary between a minimum of 0.2 and maximum of 3.0 parts by weight in relation to the
amount of the resin. Resin, hardener and accelerator can be easily mixed at
temperatures between room temperature and 40 °C.
Mixing ratio:
100.0 parts
110.0 parts
1.5 parts
by weight
by weight
by weight
EPR (resin)
EPH (hardener)
EPC (accelerator)
Potlife: at 40°C app. 7h, at 60°C app. 4h
Temperature
[°C] / [° F]
25 / 77
1)
Initial
Time up to double viscosity1) [h]
viscosity on addition of accelerator EPC 04572
[mPa·s]
1200
0%
20 h
2.0 %
5.0 h
= 10 gram sample at 20 °C / 68 °F, viscosity at 25 °C / 77 °F
Viscosity behaviour of EPR 04572 against temperature
1600
1400
viscosity [mPas]
1200
1000
800
600
400
200
0
25
27,5
30
32,5
35
37,5
40
temperature [°C]
page 2/ 5 ... area: ATE-E1 ... created: 04/97... edit date: 02/05
All information, recommendations and suggestions provided by Bakelite AG in the form of verbal or writ ten communication, or in pertinent data bases, represent our best
knowledge and experience. Such data are non-binding in character, and do not represent, either explicitly or implicitly, assurances or a gua rantee of specific properties.
The specified parameters merely represent typical data; they do not form a basis for either a guarantee or a specification. The information, recommendations and
suggestions we provide describe our products and possible applications in general or exemplary terms; they do not rela te to specific cases. The process of constant
continued development and improvement of our products can lead to changes in pertinent parameters, texts and illustrations; no s pecial mention is made of pos sible
alterations. Our technical advice does not free the customer of its responsibility to verify our current information, in particular our technical data sheets, safety data sheets
and technical information leaflets. The customer will conduct its own tests of our products to determine their suitability for the intended pro cesses and uses, as well as to
establish that their processing properties are appropriate in the pertinent situation, since our products may be used in a wide range of technical applications that involve
very dif ferent requirements according to the specific situation. Therefore, such specific cases are outside our control, and are the excIusive responsibility of the customer.
A pertinent agreement is necessary in case a binding assurance of specific parameters is required. Customers and users of our products must them selves observe
possible patent rights, existing legislation and regulations. This publication does not represent a license, nor does it authorize infringement of any type of patent. Note:
This version superse des and replaces all previous publications on this subject. Bakelite® is a registered trademark of Bakelite AG in Europe. Rütaphen ® is a registered
trademark of Bakelite AG in the United States and Canada.
4.0 %
1.5 h
Technical Information
EP Epoxy Resins
Bakelite EPR 04572
Properties of the cured, non reinforced resin system:
Mixing ratio: 100.0 pbw EPR 04572 : 110.0 pbw EPH 04572 : 1.5 pbw EPC 04572
Curing: 6h at 110°C/175 °F, heating up to 230°C (20K/m), 10h at 230°C
Properties
Flexural strength, DIN 53452
Impact strength
Compressive strength
Heat deflection temperature Tg
Units
MPa
mJ/mm²
MPa
°C
EPR 04572
60 - 65
9 - 11
180 - 190
220
Bakelite® EPC 865 as comp. C:
For a long processing time we would recommend to add our accelerator EPC 865 as
component C.
Gel-time [seconds]
150 °C / 302 °F
Mixing ratio
hot plate
100,0 pbw EPR 04572
110,0 pbw EPH 04572
3,0 pbw EPC 865
180 ± 20
Gel-time [seconds]
180 °C / 356 °F
hot plate
TG [°C] 3)
TMA
60 ± 10
194
3) Curing conditions, 1 h 80 °C / 176 °F + 1 h 180 °C / 356 °F
viscosity increase at 25°C and 40°C
100 ppw EPR 04572 + 110 ppw EPH 04572 + 3 ppw EPC 865
viscosity [mPas]
2500
2000
25°C
1500
1000
40°C
500
0
0
100
200
300
time [min]
400
500
page 3/ 5 ... area: ATE-E1 ... created: 04/97... edit date: 02/05
All information, recommendations and suggestions provided by Bakelite AG in the form of verbal or writ ten communication, or in pertinent data bases, represent our best
knowledge and experience. Such data are non-binding in character, and do not represent, either explicitly or implicitly, assurances or a gua rantee of specific properties.
The specified parameters merely represent typical data; they do not form a basis for either a guarantee or a specification. The information, recommendations and
suggestions we provide describe our products and possible applications in general or exemplary terms; they do not rela te to specific cases. The process of constant
continued development and improvement of our products can lead to changes in pertinent parameters, texts and illustrations; no s pecial mention is made of pos sible
alterations. Our technical advice does not free the customer of its responsibility to verify our current information, in particular our technical data sheets, safety data sheets
and technical information leaflets. The customer will conduct its own tests of our products to determine their suitability for the intended pro cesses and uses, as well as to
establish that their processing properties are appropriate in the pertinent situation, since our products may be used in a wide range of technical applications that involve
very dif ferent requirements according to the specific situation. Therefore, such specific cases are outside our control, and are the excIusive responsibility of the customer.
A pertinent agreement is necessary in case a binding assurance of specific parameters is required. Customers and users of our products must them selves observe
possible patent rights, existing legislation and regulations. This publication does not represent a license, nor does it authorize infringement of any type of patent. Note:
This version superse des and replaces all previous publications on this subject. Bakelite® is a registered trademark of Bakelite AG in Europe. Rütaphen ® is a registered
trademark of Bakelite AG in the United States and Canada.
Technical Information
EP Epoxy Resins
Bakelite EPR 04572
Properties of the cured, non reinforced resin system
Mixing ratio: 100.0 pbw EPR 04572 : 110.0 pbw EPH 04572 : 3 pbw EPC 865
Curing: 2 h 80 °C / 176 °F + 3 h 180 °C / 356 °F
Properties
Flexural strength, DIN 53452 / ISO 178
Deflection, DIN 53452 / ISO 178
Modulus in flexure, DIN 53452 / ISO 178
TG (DMTA); Peak max
TG (DMTA); Peak max
Spec. Volume Resistivity, DIN VDE 0303 T3
Surface Resistance, DIN VDE 0303 T3
Dielectric breakdown voltage, DIN VDE 0303 T2
Dielectric Strength, DIN VDE 0303 T2
Dielectric dissipation factor at 23 °C (73 °F) / 1 MHz,
DIN VDE 0303 T4
Dielectric constant at 23 °C (73 °F) / 1 MHz, DIN
VDE 0303 T4
Tracking Resistance, DIN 53480
Unit
MPa
mm
MPa
°C / °F
°C / °F
Ohm cm
Ohm
KV
Volts /mils
Value
104
5.5
3480
204 / 399
188 / 370
1.7 ·1015
2.0 ·1015
40
965
0.023
3.34
CTI
250 M
Note: To improve the fracture mechanical properties we recommend to add the
toughened epoxy resin Bakelite® EPR 05399 !!
Properties of the reinforced resin
Curing: 2 h 80 °C / 176 °F + 3 h 180 °C / 356 °F + 2 h 200 °C / 392 °F
C-fibre reinforced material:
Properties
TG (DMTA); Peak max
TG (DMTA); Peak max
Flexural strength
DIN 53452 / ISO 178
ILSS (short beam)
2 mm (6 layer C-fibre / Kramer 445 T),
resin content: 29.6 %
Temperature
Room temperature
Unit
°C / °F
°C / °F
MPa
Value
192 / 378
178 / 352
1058
Room temperature
MPa
47.1
page 4/ 5 ... area: ATE-E1 ... created: 04/97... edit date: 02/05
All information, recommendations and suggestions provided by Bakelite AG in the form of verbal or writ ten communication, or in pertinent data bases, represent our best
knowledge and experience. Such data are non-binding in character, and do not represent, either explicitly or implicitly, assurances or a gua rantee of specific properties.
The specified parameters merely represent typical data; they do not form a basis for either a guarantee or a specification. The information, recommendations and
suggestions we provide describe our products and possible applications in general or exemplary terms; they do not rela te to specific cases. The process of constant
continued development and improvement of our products can lead to changes in pertinent parameters, texts and illustrations; no s pecial mention is made of pos sible
alterations. Our technical advice does not free the customer of its responsibility to verify our current information, in particular our technical data sheets, safety data sheets
and technical information leaflets. The customer will conduct its own tests of our products to determine their suitability for the intended pro cesses and uses, as well as to
establish that their processing properties are appropriate in the pertinent situation, since our products may be used in a wide range of technical applications that involve
very dif ferent requirements according to the specific situation. Therefore, such specific cases are outside our control, and are the excIusive responsibility of the customer.
A pertinent agreement is necessary in case a binding assurance of specific parameters is required. Customers and users of our products must them selves observe
possible patent rights, existing legislation and regulations. This publication does not represent a license, nor does it authorize infringement of any type of patent. Note:
This version superse des and replaces all previous publications on this subject. Bakelite® is a registered trademark of Bakelite AG in Europe. Rütaphen ® is a registered
trademark of Bakelite AG in the United States and Canada.
Technical Information
EP Epoxy Resins
Bakelite EPR 04572
Processing guide for Pultrusion:
Resin bath:
room temperature
Tool temperature:
180 °C – 200 °C / 356 – 392 °F
Speed:
approx. die length per minute
(die length = 36 inches; 36 inches / min. speed)
Note: We recommend to use between 2.0 and 3.0 % of an an internal release agent,
for example Bakelite ® EPM 05288. To improve the surface quality of the profile we
suggest to use typical fillers 10 – 20%, like ASP 400 P.
Precautions
When handling Bakelite epoxy resins and Bakelite hardeners, will you please
observe the APME documentation “epoxy resins and curing agents”.
page 5/ 5 ... area: ATE-E1 ... created: 04/97... edit date: 02/05
All information, recommendations and suggestions provided by Bakelite AG in the form of verbal or writ ten communication, or in pertinent data bases, represent our best
knowledge and experience. Such data are non-binding in character, and do not represent, either explicitly or implicitly, assurances or a gua rantee of specific properties.
The specified parameters merely represent typical data; they do not form a basis for either a guarantee or a specification. The information, recommendations and
suggestions we provide describe our products and possible applications in general or exemplary terms; they do not rela te to specific cases. The process of constant
continued development and improvement of our products can lead to changes in pertinent parameters, texts and illustrations; no s pecial mention is made of pos sible
alterations. Our technical advice does not free the customer of its responsibility to verify our current information, in particular our technical data sheets, safety data sheets
and technical information leaflets. The customer will conduct its own tests of our products to determine their suitability for the intended pro cesses and uses, as well as to
establish that their processing properties are appropriate in the pertinent situation, since our products may be used in a wide range of technical applications that involve
very dif ferent requirements according to the specific situation. Therefore, such specific cases are outside our control, and are the excIusive responsibility of the customer.
A pertinent agreement is necessary in case a binding assurance of specific parameters is required. Customers and users of our products must them selves observe
possible patent rights, existing legislation and regulations. This publication does not represent a license, nor does it authorize infringement of any type of patent. Note:
This version superse des and replaces all previous publications on this subject. Bakelite® is a registered trademark of Bakelite AG in Europe. Rütaphen ® is a registered
trademark of Bakelite AG in the United States and Canada.