Dendritic eosin B-iodonium salt light initiator and preparation method and application thereof

A dendritic, visible light technology, applied in epoxy resin coatings, coatings, polyester coatings, etc., can solve the problems of high volatility, single function, weak anti-migration ability, etc., and achieve high initiation efficiency and strong penetration ability , the effect of cheap light source

Active Publication Date: 2019-10-08
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there are many types of small molecule initiators and their development is relatively mature, small molecule visible light initiators have di

Method used

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  • Dendritic eosin B-iodonium salt light initiator and preparation method and application thereof
  • Dendritic eosin B-iodonium salt light initiator and preparation method and application thereof
  • Dendritic eosin B-iodonium salt light initiator and preparation method and application thereof

Examples

Experimental program
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Example Embodiment

[0032] The method for preparing the dendritic eosin B-iodonium salt visible light initiator of the above structure includes the following steps:

[0033] (1) The intermediate end group is a dendrimer with 8 acrylates (PAE(=) 8 ) Synthesis: Mix trimethylolpropane triacrylate, ethylenediamine, and anhydrous methanol, heat to 30°C, react for 4-8 hours, and wash with anhydrous methanol after the reaction to obtain a colorless and transparent viscous liquid , The reaction formula is as follows:

[0034]

[0035] (2) The intermediate end group is a dendrimer with 8 primary amino groups (PAE(NH 2 ) 8 ) Synthesis: PAE(=) 8 Mix with ethylenediamine, heat to 30°C, react for 24 hours, distill under reduced pressure, and wash with ethyl acetate to obtain a light yellow transparent viscous liquid. The reaction formula is as follows:

[0036]

[0037] (3) Synthesis of intermediate diphenyl iodonium chloride: mix benzene, acetic anhydride, and potassium iodate, react in a brine ice bath, drop aceti...

Example Embodiment

[0044] Example 1: Preparation of visible light initiator

[0045] (1) Synthesis of a dendrimer with 8 acrylate end groups (PAE(=)8):

[0046] Mix 60 g of trimethylolpropane triacrylate, 2.4 g of ethylenediamine, and 30 mL of anhydrous methanol, heat to 30° C., react for 6 hours, and wash with anhydrous methanol to obtain a colorless and transparent viscous liquid.

[0047] (2) Synthesis of a dendrimer (PAE(NH2)8) with 8 primary amino groups at the end of the intermediate:

[0048] Mix 4.665g PAE(=)8 and 108g ethylenediamine, heat to 30-50°C, react for 24 hours, distill under reduced pressure, and wash with ethyl acetate to obtain a light yellow transparent viscous liquid.

[0049] (3) Synthesis of intermediate diphenyl iodonium chloride:

[0050] Mix 9 mL of benzene, 10 mL of acetic anhydride, and 10.7 g of potassium iodate, and slowly drop 7 mL of concentrated sulfuric acid and 10 mL of acetic anhydride in a brine ice bath (about -5°C). After dripping, the mixture was placed at room te...

Example Embodiment

[0057] Example 2: PAE-EB (IPh 2 ) 2 Visible light induced unsaturated resin

[0058] PAE-EB(IPh 2 ) 2 Visible light triggers epoxy acrylate:

[0059] Take 1.3g epoxy acrylate and 0.7g reactive diluent TMPTA, stir and mix uniformly, and add various visible light initiators (PAE-EB (IPh) 2 ) 2 Photoinitiator, EB (IPh 2 ) 2 The combined photoinitiator composed of photoinitiator and EB+10% by weight of co-initiator vitamin C, namely EB+10%Vc), is mixed with a mixer, and a thin film about 0.1mm thick is coated on the glass slide and placed Cure under 500WLED lamp radiation and record the curing time. The results are shown in Table 1.

[0060] Table 1 The curing time of the initiator initiated epoxy acrylate

[0061]

[0062] PAE-EB(IPh 2 ) 2 Visible light induced hyperbranched polyester acrylate:

[0063] Take 1.3g of hyperbranched polyester acrylate and 0.7g of reactive diluent TMPTA, stir and mix uniformly, and add various visible light initiators (PAE-EB (IPh of the present invention) 2...

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Abstract

The invention discloses a dendritic eosin B-iodonium salt light initiator and a preparation method and application thereof. By combination of chromophore eosin B and iodonium salt, an electron transfer type visible light initiator system is obtained; by introduction of the electron transfer type visible light initiator system into a dendritic compound, visible light initiating efficiency is remarkably improved. The light initiator has advantages of environmental friendliness, high compatibility, low energy consumption and the like and used for initiating unsaturated polyester resin curing. A macromolecular light initiator is achieved, and by application of specific dendritic eosin B-iodonium salt to unsaturated polyester resin curing, appearance, hardness, glossiness and flexibility of obtained coatings are all excellent.

Description

technical field [0001] The invention belongs to the field of photoinitiator preparation, and in particular relates to a dendritic eosin B-iodonium salt visible light initiator and a preparation method and application thereof. Background technique [0002] Photocuring technology has become an integral part of the field of polymer science and technology. light guide [0003] Hair not only has low energy consumption, high polymerization efficiency, and is environmentally friendly, it has now become a key component of photocuring technology. [0004] Since the energy of ultraviolet light is much higher than that of visible light, the development of ultraviolet photoinitiators is more mature. However, there are many problems caused by ultraviolet light that cannot be ignored. When ultraviolet light acts on the human body, it will cause headaches, dizziness, eye irritation, dermatitis, and even skin cancer. Compared with ultraviolet light, visible light can directly use sunligh...

Claims

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Application Information

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IPC IPC(8): C08G83/00C08F2/48C08L67/06C08L63/10
CPCC08G83/003C08F2/48C08L67/06C08L63/10C09D167/06C09D163/10
Inventor 宁春花周弟张涵陈梦舟陈雨蒙
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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