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Hydrophilic UV photocuring monomer, aqueous emulsion and preparation methods of hydrophilic UV photocuring monomer and aqueous emulsion

A photocurable monomer, hydrophilic technology, applied in ether preparation, alkylene oxide preparation ether, organic chemistry, etc., can solve the problems of poor curing effect, damage of epoxy group of photocurable monomer, weak strength, etc.

Pending Publication Date: 2021-09-10
ZHEJIANG HUANGMA TECH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the applicant found that: the photocurable monomer obtained by this method is destroyed on the one hand, and the curing effect is not good; Light curing resin is weak

Method used

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  • Hydrophilic UV photocuring monomer, aqueous emulsion and preparation methods of hydrophilic UV photocuring monomer and aqueous emulsion

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preparation example Construction

[0034] Such as figure 1 As shown, the present invention provides a kind of preparation method of above-mentioned hydrophilic UV photocurable monomer, comprises the following steps:

[0035] Step S100. Feeding and deoxygenation: Add bisphenol A polyoxyethylene ether and potassium hydroxide into the reactor, and cycle the reactor for several times to vacuumize and set nitrogen to complete deoxygenation; wherein, the reactor The number of times of carrying out cyclical vacuuming and putting nitrogen is preferably 3 times.

[0036] Step S200. Pre-reaction: under the protection of nitrogen, heat up and add epichlorohydrin to the reaction kettle for reaction. When a certain amount of epichlorohydrin is added, start stirring, and continue to add epichlorohydrin to mature Reaction; wherein, the heating temperature is 60°C to 80°C, and epichlorohydrin is added to the reactor by slow dripping, the rate of addition is 4g / min and when half of the epichlorohydrin is added slowly Turn on ...

Embodiment 1

[0051] The preparation steps of the hydrophilic UV photocurable monomer emulsion of Example 1 of the present invention are as follows:

[0052] 1. 1000g bisphenol A polyoxyethylene ether and 3g KOH are added in the reactor, and the reactor is circulated 3 times to vacuumize and put nitrogen to remove oxygen; the number of the ethoxy group of the bisphenol A polyoxyethylene ether is 2, that is, bisphenol A polyoxyethylene (2) ether.

[0053] 2. Under nitrogen protection, at 60°C, slowly drop 644g of epichlorohydrin (ECH) for pre-reaction, and continue the reaction for 3h after the dropwise addition.

[0054] 3. Distill the pre-reaction product under reduced pressure at 80° C. to remove unreacted epichlorohydrin.

[0055] 4. After the distillation under reduced pressure, 316g of NaOH was added to the reaction system at 30°C, and the reaction was stirred for 3h.

[0056] 5. Add a certain amount of distilled water, stir for 1 hour, let stand for 2 hours, and use a separatory fun...

Embodiment 2

[0062] The preparation steps of the hydrophilic UV photocurable monomer emulsion of Example 2 of the present invention are as follows:

[0063] 1. 1000g bisphenol A polyoxyethylene ether and 3g KOH are added in the reactor, and the reactor is circulated 3 times to vacuumize and put nitrogen to remove oxygen; the number of the ethoxy group of the bisphenol A polyoxyethylene ether is 2, that is, bisphenol A polyoxyethylene (2) ether.

[0064] 2. Under nitrogen protection, at 60°C, slowly drop 644g of epichlorohydrin (ECH) for pre-reaction, and continue the reaction for 4h after the dropwise addition.

[0065] 3. Distill the pre-reaction product under reduced pressure at 80° C. to remove unreacted epichlorohydrin.

[0066] 4. After vacuum distillation, 316g NaOH was added to the reaction system at 30°C, and the reaction was stirred for 4h.

[0067] 5. Add a certain amount of distilled water, stir for 1 hour, let stand for 2 hours, and use a separatory funnel to separate the wat...

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Abstract

The invention relates to preparation methods for a hydrophilic UV photocuring monomer and an aqueous emulsion thereof. The hydrophilic UV photocuring monomer is prepared from bisphenol A polyoxyethylene ether, epoxy chloropropane, ethylene glycol monovinyl ether, potassium hydroxide, sodium hydroxide, a polymerization inhibitor and a catalyst. The structural formula of the hydrophilic UV photocuring monomer is shown in the specification. In the structural formula, n is in a range of 2-4. Thus, on the basis of keeping the original strength of bisphenol A type photocuring resin, an ethyoxyl group is introduced, so toughness is enhanced, and the resin is not easy to break and fall off; and hydrophilic ether bonds and hydroxyl groups are introduced, so the hydrophilicity of the photocuring monomer is enhanced, a low-VOC aqueous emulsion is easy to prepare, and the prepared aqueous emulsion is good in stability.

Description

technical field [0001] The invention belongs to the technical field of polymer resin modification, and in particular relates to a hydrophilic UV photocurable monomer, an aqueous emulsion and a preparation method thereof. Background technique [0002] Bisphenol A type photocurable monomer can undergo photopolymerization or photocrosslinking reaction under ultraviolet light irradiation to form bisphenol A type resin. Bisphenol A photocurable resin has the advantages of chemical corrosion resistance, wear resistance, high hardness, and low price. However, the applicant found that: the existing bisphenol A type photocurable monomers have high viscosity and poor hydrophilicity, and often need a large amount of organic solvents or reactive diluents to be used together in the application process, so that the monomers in the application It will lead to relatively high VOC and serious environmental pollution. As the world's environmental protection requirements become stricter, VOC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/23C07C41/03C08J3/03C08F116/12
CPCC07C43/23C08J3/03C08F116/12
Inventor 刘凯金一丰寇然王新荣周扬贺丽丹
Owner ZHEJIANG HUANGMA TECH
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