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Dear <<First Name>> <<Last Name>>
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Feature:
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When formulating UV curable coatings, both resin selection and additive choice influence the final properties of a cured film. This is especially true when you are trying to obtain adhesion across a range of substrates. As illustrated by the data below, GENORAD* 40 by itself can be used with a variety of resin types to improve adhesion to aluminum substrates. Even here, resin choice had an effect on the loading level required to obtain optimal adhesion. On more difficult substrates such as steel and stainless steel (SS), we found a blend of both GENORAD* 40 and GENOMER* 7302 were necessary for good adhesion. Once again, we saw that different levels of addition yielded different results depending on the resin involved.
| Products |
Base formula |
E-1 |
E-2 |
E-3 |
E-4 |
E-5 |
U-2 |
U-4 |
U-5 |
P-2 |
P4 |
P-5 |
| GENOMER* 2252 |
35* |
34 |
33 |
31 |
32 |
31 |
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| GENOMER* 4312 |
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33 |
32 |
31 |
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POLYESTER
ACRYLATE 03-849 |
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33 |
32 |
31 |
| DPGDA |
61 |
60 |
58 |
55 |
56.5 |
55 |
58 |
56.5 |
55 |
58 |
56.5 |
55 |
| GENORAD* 40 |
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2 |
5 |
10 |
5 |
5 |
5 |
5 |
5 |
5 |
5 |
5 |
| GENOMER* 7302 |
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2.5 |
5 |
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2.5 |
5 |
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2.5 |
5 |
| GENOCURE* DMHA |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
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| ASTM Test Method D3359: |
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| Adhesion to Al |
0 |
100 |
100 |
100 |
100 |
100 |
95 |
100 |
100 |
100 |
100 |
100 |
| Adhesion to SS |
0 |
60 |
80 |
80 |
100 |
100 |
70 |
80 |
100 |
60 |
100 |
100 |
| Adhesion to Steel |
0 |
0 |
10 |
50 |
60 |
65 |
15/20 |
40 |
80 |
60/70 |
95 |
100 |
* The same adhesion was observed with GENOMER* 4312 and POLYESTER ACRYLATE 03-849
These formulas were not optimized for performance and are simply designed to illustrate the potential benefits |
As shown by these basic evaluations, achieving good adhesion is a complex goal involving many components in a final formulation. Whether you need to adjust your oligomer or to select the right additives, RAHN can help. We have a broad portfolio and can provide the technical expertise to help you find the right mix. For more information visit www.rahn-group.com or contact your local Sales Representative.
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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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