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Combinations of photoinitiators and uses thereof

A photoinitiator and initiator technology, applied in the novel combination of acyl phosphine oxide and coumarin ketone, in the field of co-initiator combination, which can solve the problems of not being suitable for visible light LED lamps, etc.

Pending Publication Date: 2022-05-13
IGM RESINS ITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unfortunately, the examples mentioned in the book are not suitable for 395nm, 400nm, 405nm visible LED lights

Method used

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  • Combinations of photoinitiators and uses thereof
  • Combinations of photoinitiators and uses thereof
  • Combinations of photoinitiators and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0242] surface cure and full cure

[0243]Test formulations were prepared by dissolving 6% by weight of the blend in an industrial cyan offset ink based on a multifunctional acrylate containing 15-20% pentaerythritol [5EO] tetraacrylate; Trimethylolpropane tetraacrylate, 5-10% trimethylolpropane [3EO] triacrylate, 1-2% glycerol [4PO] triacrylate and 15-18% cyan pigment (15:3 phthalocyanine blue ), all percentages are by weight. The test formulations were homogenized with a mechanical stirrer for 1 hour at ambient temperature and then coated on Leneta paper at a thickness of 1.5 microns using an IGT repro-tester device.

[0244] The formulations were cured using a Phoseon Fire Power 395nm UV-LED lamp (4W / cm) at a distance of 5mm.

[0245] The evaluation of the surface cure is the number of passes at a speed of 100 m / min to obtain a dry surface (cotton test). The lower the number of passes, the better the surface cures.

[0246] In addition, by FT-IR spectroscopy at about ...

Embodiment 2

[0256] Synergy of LFC3644 and other coumarin ketones with acylphosphine oxides

[0257] To prepare LED curable ink, add 4.32 parts of acylphosphine oxide and 0.72 parts of Esacure to industrial cyan offset printing ink TM 3644, the mixture was stirred at ambient temperature for 1 hour until homogeneous. The ink was printed onto Leneta paper at a thickness of 1.5 microns using an IGT replica tester device and cured with a Phoseon Flare Power 395nm UV-LED lamp (4W / cm) at a distance of 5mm.

[0258] Surface cure and complete cure were checked as described in Example 1. The results are listed in Table 4.

[0259] Table 4: Acylphosphine oxides and coumarinones 3644 reactivity.

[0260]

[0261] These results demonstrate that, in the absence of co-initiators, a liquid blend such as compound 1+ The mixture of 3644 has good performance in both surface curing and full curing. Other coumarin ketones and compound 1 were tested under the same conditions, and the results are s...

Embodiment 3

[0266] co-initiator Synergistic effect of coumarinone on compound 1 in the presence of 4250

[0267] To prepare compound 1, a blend of different coumarin ketones and amine co-initiators, 4.32 parts of compound 1, 0.72 parts of coumarin ketone and 0.96 parts of co-initiator Photomer TM 4250 is added to industrial cyan offset printing inks. As a control, prepare no Photomer TM The same formulation of 4250. Testing was performed as reported in previous examples. The results are shown in Table 6.

[0268] Table 6: Compound 1 and coumarin ketone and 4250 Blends for Coordination

[0269]

[0270]

[0271] (*) Maximum speed of the belt

[0272] The results confirmed that the presence of amine co-initiators further improved the performance of the two-component combination blends.

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Abstract

The present invention relates to homogeneous liquid / fluid combinations of photoinitiators with improved formulability, reactivity and surface curing properties, more particularly to novel combinations of acylphosphine oxides and coumarin ketones, optionally further in combination with at least one co-initiator.

Description

[0001] field of invention [0002] The present invention relates to homogeneous liquid / fluid combinations of photoinitiators with improved formulatability, reactivity and surface cure properties, and more particularly to novel combinations of acylphosphine oxides and ketonecoumarins, optionally further combined with At least one co-initiator combination. Background technique [0003] Oxygen sensitivity is a major problem during free radical polymerization of acrylates, resulting in poor mechanical properties and surface tackiness of cured films. [0004] Methods to overcome oxygen inhibition are documented in Progress in Organic Coatings 77, (2014) 1789-1798 and can be grouped into different strategies: [0005] - Inert coating with gas inert equipment (nitrogen, carbon dioxide). This approach can solve the problem, but the cost is high. [0006] - Use high-beam radiant lamps that generate a higher concentration of free radicals. If the primary output of the lamp matches t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/48C08F2/50C08F4/32C08F122/10C08F222/10C09D11/101
CPCC08F2/48C08F2/50C08F4/32C08F222/104C08F122/1006C09D11/101C08F222/103C08K5/1545C08K5/5397
Inventor A·卡斯拉希G·诺切尼S·波斯特尔
Owner IGM RESINS ITAL
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