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A kind of ultraviolet curing coating and preparation method thereof

A technology of curing coatings and ultraviolet light, which is applied in coatings and other directions, can solve the problems of decreased transparency of paint films, poor scratch resistance and poor wear resistance, and achieve excellent transparency, scratch resistance and wear resistance The effect of improving and increasing hardness

Active Publication Date: 2016-08-24
深圳市科汇泰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, the preparation of wear-resistant and scratch-resistant UV-curable coatings usually uses high-functionality UV-curable resins, and adds a small amount of wear-resistant powder, smooth powder or polyethylene wax to improve scratch resistance and wear resistance. However, with the addition of these fillers, the film transparency decreased
If no filler is added, the scratch resistance and wear resistance will be poor

Method used

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  • A kind of ultraviolet curing coating and preparation method thereof
  • A kind of ultraviolet curing coating and preparation method thereof
  • A kind of ultraviolet curing coating and preparation method thereof

Examples

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preparation example Construction

[0047] The invention also discloses a preparation method of the ultraviolet curing coating, which comprises the following steps:

[0048] 80 to 135 parts by weight of mercapto acrylate with a functionality of 3 to 64, 16 to 21 parts by weight of acrylate monomer with a functionality of 3 or more, 1 to 5 parts by weight of isobornyl acrylate, 0.29 to 0.82 parts by weight Leveling agent, 0.15-0.75 parts by weight of defoamer and 0.48-4.12 parts by weight of photoinitiator are mixed and stirred to obtain an ultraviolet curable coating;

[0049] The preparation method of the mercapto acrylate with a functionality of 3 to 64 is:

[0050] Under the protection of nitrogen, in toluene, after the esterification reaction of polyols with functionality greater than or equal to 3 and carboxylic acids containing mercapto groups under the action of a catalyst, supersaturated sodium bicarbonate is added, and the aqueous phase is extracted with dichloromethane and removed under reduced pressure. Org...

Embodiment 1

[0056] Under the protection of nitrogen, add 132g trimethylolpropane, 351g 2-mercaptobutyric acid and 160g toluene into a three-necked flask, raise the temperature to 115°C, add 0.35g p-toluenesulfonic acid, react for 5 hours, remove the toluene under reduced pressure 530g supersaturated sodium bicarbonate solution was added, the aqueous phase was extracted with 210ml dichloromethane, and the dichloromethane was removed under reduced pressure to obtain a trifunctional acrylate with a functionality of 3.

Embodiment 2

[0058] Under the protection of nitrogen, add 256g of dipentaerythritol, 798g of 3-mercaptoisobutyric acid and 358g of toluene into a three-necked flask, raise the temperature to 140℃, add 1.2g of p-toluenesulfonic acid, react for 7 hours, remove the toluene under reduced pressure, add 1260 g of supersaturated sodium bicarbonate solution, the aqueous phase was extracted with 360 ml of dichloromethane, and the dichloromethane was removed under reduced pressure to obtain a six-functional acrylate with a functionality of 6.

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Abstract

The invention provides an ultraviolet light-curing coating, comprising the following components in parts by weight: 80-135 parts by weight of mercapto acrylate with a functionality of 3-64; 6-21 parts by weight of an acrylate monomer with a functionality of 3 or more 1 to 5 parts by weight of isobornyl acrylate; 0.29 to 0.82 parts by weight of a leveling agent; 0.15 to 0.75 parts by weight of a defoaming agent; 0.48 to 4.12 parts by weight of a photoinitiator. The preparation method is as follows: mercapto acrylate with functionality of 3-64, acrylate monomer with functionality greater than or equal to 3, isobornyl acrylate, leveling agent, defoamer and photoinitiator are mixed and stirred. Since the mercaptoacrylate contains sulfur, it can generate sulfur free radicals under ultraviolet light irradiation, and then conduct free radical polymerization with acrylate monomers containing unsaturated double bonds to form a paint film and improve the hardness of the paint film, Scratch and abrasion resistance. In addition, no filler is used in the UV-curable coating of the present invention, so the obtained paint film has excellent transparency.

Description

Technical field [0001] The invention relates to the field of coatings, in particular to ultraviolet curing coatings and a preparation method thereof. Background technique [0002] UV-curable coatings are composed of oligomers, monomers, photoinitiators and auxiliary agents. The photoinitiators are decomposed by ultraviolet (UV) light radiation, and active free radicals are generated to initiate polymerization and crosslinking of monomers or oligomers to form coating. Ultraviolet curing coatings are environmentally friendly coatings. Generally, the energy consumption of UV curing is 1 / 5 of that of thermal curing, and UV curing coatings contain less volatile components and cause less pollution. In recent years, UV-curable coatings have developed rapidly in optical fiber coatings, medical devices, impurity covers, and the automotive industry. In particular, computer, communications, electronic products and PET sheet packaging materials have increasingly higher requirements for sur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/02
Inventor 张红明乔立军李冬威王献红李季王佛松
Owner 深圳市科汇泰科技有限公司