TECHNICAL DATA SHEET
AL 2020
February 19, Version 02 /2019
1
TECHNICAL DATA SHEET
AL 2020
February 19, Version 02 /2019
1
TECHNICAL DATA SHEET
AL 2020 with AL 2021, AL 2022, or AL 2023 Hardeners
HIGH PERFORMANCE LAMINATING SYSTEM
FLAME RETARDANT, VARIABLE HARDENERS
DESCRIPTION
AL 2020 resin with AL 2021, AL 2022, or AL 2023 hardeners is a specially formulated flame-retardant
system for laminated parts. It is suitable for use with glass, carbon and aramid fabrics, and parts can be
heated immediately for faster process times.
APPLICATIONS
High performance automotive body panels used in NASCAR flame-retardancy applications
Suitable for vacuum-bagging and RTM
No need to wait for a room temperature gel, can be put directly into the oven
PROPERTIES
Low viscosity for good wet-out
R.T. and post-cured options
Three hardener choices
Non-Halogen flame retardancy
Self-extinguishing
RoHS and REACH compliant
Epoxy (non-styrene system)
Excelllent bond to all fabrics
Suitable for aramid fiber
laminates
TECHNICAL DATA SHEET
AL 2020
February 19, Version 02 /2019
2
Physical Properties Handling
Property Units AL 2020
Resin
AL 2021
Hardener
AL 2022
Hardener
AL 2023
Hardener
Composition Epoxy Amine Amine Amine
Mix Ratio, by weight 100 22 24 30
Appearance Clear Liquid Clear Liquid Clear Liquid Clear Liquid
Color Light Amber Light Amber Light Amber Light Amber
Viscosity @ 77 F (25 C)
Cps & mPa.s
Brookfiefd LVT 3,500 35 62 70
Viscosity, mixed @ 77 F
(25 C) Cps & mPa.s
Brookfiefd LVT 1,000 1,375 1,300
Density @ 77 F (25 C)
lbs./gal. (g/cc)
ASTM D 1480 9.74 (1.17) 7.99 (.96) 7.91 (.95) 7.97 (.96)
Gel time, 130g at 77 F
(25 C)
Minutes 61 222 480
Neat Cured Properties tested at 74 F (23 C)
Test Method Unit(s)
With AL 2021
Hardener
With AL 2022
Hardener
With AL 2023
Hardener
Glass Transition
Temperature (Tg)
* R.T Cure
**150 F Post-Cure
ASTM E1545
F ( C)
126 (52)
131 (55)
103 (39)
154 (68)
124 (51)
140 (60)
Glass Transition
Temperature (Tg)
(Ultimate Tg via
DSC test method)
ASTM D-3418
F ( C)
226 (108)
203 (95)
199 (93)
Hardness
* R.T Cure
**150 F Post-Cure
ASTM D-
2240
Shore D
85
87
83
87
79
87
Flexural Strength
* R.T. Cure
** 150 F Post-Cure
ASTM D790
psi (MPa)
10,128 (70)
15,500 (107)
11,303 (78)
18,800 (130)
11,390 (79)
12,500 (86)
Flexural Modulus
* R.T. Cure
** 150 F Post-Cure
ASTM D790
psi (MPa)
490,440 (3,384)
495,000 (3,410)
338,972 (2,339)
490,000 (3,380)
352,537 (2,433)
380,000 (2,620)
Tensile Strength
* R.T. Cure
** 150 F Post-Cure
ASTM D638
psi (MPa)
5,875 (41)
11,500 (79)
4,475 (31)
8,500 (59)
8,373 (58)
7,500 (52)
Tensile Modulus
* R.T. Cure
** 150 F Post-Cure
ASTM D638
psi (MPa)
311,990 (2,153)
315,000 (2,170)
253,857 (1,752)
275,000 (1,900)
245,785 (1,696)
245,000 (1,690)
Tensile Elongation
* R.T. Cure
** 150 F Post-Cure
ASTM-D638
%
2.2
5.1
2.0
4.0
6.0
3.7
*cured-7 days at 77 F (25 C) **cured 3 hours at 150 F (66 C)
– Systems cured 3 hours at 170 F (77 C)
Results are average values on laboratory prepared test samples
TECHNICAL DATA SHEET
AL 2020
February 19, Version 02 /2019
3
PROCESSING
After mixing according to the indicated ratio impregnate the reinforcement
according to the selected process. Accelerated cure schedule: The laminate
can be immediately placed into up to 150 F (66 C) oven for three hours.
Normal cure schedule: Allow to set 24 hours at room temperature,
then post cure up to 200 F if needed.
HANDLING PRECAUTIONS
Normal health and safety precautions should be observed when handling these products :
Ensure good ventilation.
Wear gloves, glasses and protective clothes.
For further information, please consult the Safety Data Sheets.
STORAGE CONDITIONS
Product shelf life of resin and hardener is 12 months when stored in original unopened
containers between 65 77 F (15 25 C). Any opened can must be tightly closed. Any
opened can must be tightly closed.
PACKAGING
Packaging information on request, please contact your local sales representative or find your
local contact on www.sikaadvancedresins.us
LEGAL NOTICE
The information, and, in particular, the recommendations relating to the application and end-use
of Sika products, are given in good faith based on Sika s current knowledge and experience of the
products when properly stored, handled and applied under normal conditions in accordance with
Sika s recommendations. In practice, the differences in materials, substrates and actual site
conditions are such that no warranty in respect of merchantability or of fitness for a particular
purpose, nor any liability arising out of any legal relationship whatsoever, can be inferred either
from this information, or from any written recommendations, or from any other advice offered.
The user of the product must test the product s suitability for the intended application and
purpose. Sika reserves the right to change the properties of its products. The proprietary rights of
third parties must be observed. All orders are accepted subject to our current terms of sale and
delivery. Users must always refer to the most recent issue of the local Product Data Sheet for the
product concerned, copies of which will be supplied on request.
TECHNICAL DATA SHEET
AL 2020
February 19, Version 02 /2019
4
CONTACT
UNITED STATES
Sika Corporation
30800 Stephenson Highway
Madison Heights, Michigan 48071 USA
Tel.: (+1) 248 588-2270
Fax: (+1) 248 577-0810
E-mail: advanced.resins@us.sika.com
Website: www.sikaadvancedresins.us