Dual cure reaction products of self-photoinitiating multifunctional acrylates with cycloaliphatic epoxy compounds
An epoxide, reaction product technology, applied in dentistry and other directions, can solve the problems of low adhesion and limitation of metal substrates
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Embodiment 1
[0066] Novel Michael addition polyacrylate resins were synthesized based on the Michael donor ethyl acetoacetate and 2,4-pentanedione according to the methods described in US Patent 5945489 and US Patent 6025410. The Michael polyacrylate resins were blended with various cycloaliphatic epoxies at varying levels. The resin / epoxide composition was applied to a phosphated steel substrate and cured at a UV dose of 1500 mJ / cm2. All tests were carried out on cured resin coatings 24 hours after UV radiation to ensure that the subsequent so-called dark cure of the epoxy component was complete. The results are shown in Table I, Table II and Table III.
[0067] 1
2
3
4
5
Michael plus polypropylene
100.00
50.00
0.00
50.00
0.00
UVR 6105
0.00
50.00
100.00
0.00
0.00
UVR 6128
0.00
0.00
0.00
50.00
100.00
Sarto...
Embodiment 2
[0075] According to the method described in US Patent 5945489 and US Patent 6025410, Michael addition polyacrylate resin was synthesized based on 75:25 HDDA and TMPTA and ethyl acetoacetate. The resin with Uvacure TM 1562 (UCB Chemicals) Blend, Uvacure TM 1562 (UCB Chemicals) is an acrylate-cycloaliphatic epoxy blend containing two acrylate and epoxy functionalities. The mixture was applied to a phosphate steel or aluminum substrate and cured at a UV dose of 1500 mJ / cm2. Adhesion, solvent resistance, pencil hardness, gloss, abrasion resistance are as given above in the preceding examples. As explained in Example 1, all tests were performed 24 hours after UV irradiation.
[0076] 1
2
3
4
5
resin
Example 2
Example 2
Example 2
Example 2
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1562
1562
1562
1562
weight % epoxy
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10
25
50
100
adhesiveness
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