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Dear <<First Name>> <<Last Name>>
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Product:
Bisphenol A-free formulation
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If you are looking to remove epoxy acrylates (EA) to achieve a Bisphenol A-free formulation, there is a wide range of options depending on the final properties that are most important to you. For an inexpensive, high gloss formulation, you can replace the EA with GENOMER* 2312, an epoxidized soy oil acrylate.
For higher performance, you can choose among aliphatic epoxy acrylates (e.g. GENOMER* 2235), Polyether Acrylates (e.g. GENOMER* 3497) or Polyester Acrylates (e.g. POLYESTER ACRYLATE 03-849). In many cases, these substitutions can deliver added benefits such as lower viscosity or faster cure speed. The data in the following table show how these different products perform in a simple overprint varnish formulation.
| Product |
A |
C-1 |
C-2 |
D-1 |
D-2 |
E-1 |
E-2 |
| GENOMER* 2252 |
45 |
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| TPGDA |
25 |
25 |
17.5 |
25 |
17.5 |
25 |
17.5 |
| TMPEOTA |
25 |
25 |
17.5 |
25 |
17.5 |
25 |
17.5 |
| GENOCURE* DMHA |
5 |
5 |
5 |
5 |
5 |
5 |
5 |
| GENOMER* 2235 |
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45 |
60 |
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| GENOMER* 3497 |
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45 |
60 |
| POLYESTER ACRYLATE 03-849 |
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45 |
60 |
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| TOTAL |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
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| Viscosity (mPas @ 25°C) |
630 |
296 |
1264 |
113 |
240 |
115 |
179 |
| #10 rod on a standard Leneta card |
| Required Dose (mJ/cm2)* |
78 |
195 |
<39 |
<39 |
<39 |
<39 |
<39 |
| Color (∆b)*** |
0.03 |
0.19 |
0.14 |
0.58 |
0.45 |
1.41 |
1.45 |
| Solvent Resistance (MEK)** |
>200 |
>200 |
>200 |
>200 |
>200 |
>200 |
>200 |
| Hardness (Shore D)** |
66 |
71 |
71 |
49 |
48 |
54 |
48 |
| Pencil Hardness** |
>4B |
>4B |
>4B |
>4B |
>4B |
>4B |
>4B |
| Gloss 60° ** |
97.2 |
94.5 |
94.7 |
92.4 |
93.4 |
93.4 |
93.6 |
* 200 W/in Hg bulb
** 30 ft/min
*** Standard = Leneta (2.92 b*), 30 ft/min
With careful product selection and, perhaps, some formulation adjustment, you can eliminate Bisphenol A and maintain your coating properties and performance. For help in choosing the right product for your specific application, visit our web site www.rahn-group.com or contact your local technical sales representative.
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Holiday Schedule:
Our US offices will be closed on the following dates:
- December 24, 25, 31
- January 1, 2020
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For more information or to order samples visit our web site or contact your local RAHN USA representative:
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