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Hyperbranched ultraviolet cured coating and preparation method thereof

A technology of curing coatings and ultraviolet light, which is applied in the field of coatings, can solve the problems of physical and chemical performance indicators such as paint film adhesion, pungent odor, high toxicity, and slow curing rate, etc., and achieve fast curing paint film physical and chemical properties and good compatibility. , the effect of improving fluidity

Active Publication Date: 2014-11-05
GUANGZHOU BAIYUN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, most photocurable polyurethanes in the prior art are linear polymers, and their viscosity increases continuously with the increase of molecular weight, so a large amount of active monomer diluent needs to be added to adjust the viscosity
Since the reactive monomer diluent has a special pungent smell and high toxicity, on the one hand, it brings a certain degree of pollution and adverse effects on the construction environment, on the other hand, it will cause the curing rate to decrease and the cured film to shrink, thus Lead to the decline of physical and chemical performance indicators such as paint film adhesion

Method used

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  • Hyperbranched ultraviolet cured coating and preparation method thereof
  • Hyperbranched ultraviolet cured coating and preparation method thereof
  • Hyperbranched ultraviolet cured coating and preparation method thereof

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Embodiment 1

[0027] 1. For the hyperbranched UV-curable coating of this embodiment, its raw material composition is as shown in Table 1 by weight percentage:

[0028] Table 1 The formula composition of embodiment one hyperbranched UV-curable coating

[0029]

[0030] 2. The preparation method of the hyperbranched UV-curable coating of the present embodiment is as follows:

[0031] (1) Synthesis of terminal acrylate hyperbranched polyurethane

[0032] (1-1) Preparation of hyperbranched polyester (HBPE)

[0033] Add neopentyl glycol, dimethylolpropionic acid and p-toluenesulfonic acid into the reaction flask, according to the molar ratio of neopentyl glycol: dimethylolpropionic acid=1:14, the amount of p-toluenesulfonic acid is by weight percentage It is 0.05% of the total amount of neopentyl glycol and dimethylolpropionic acid; after reacting at 140°C for 4 hours under the protection of nitrogen, stop the nitrogen flow, change the pressure and vacuum to continue the reaction for 4 hour...

Embodiment 2

[0042] The difference between the present embodiment and the first embodiment is that in the preparation method of the hyperbranched UV-curable coating, the preparation of the semi-blocked isocyanate MDI HPA monomer in the step (1-2) is as follows:

[0043] Add diphenylmethane diisocyanate MDI and p-hydroxyanisole (the amount of which is 0.08% of the mass of MDI) into the reaction flask, use DBTDL as a catalyst, and dropwise add a mixed solution formed by dissolving hydroxypropyl acrylate in acetone under stirring , where the molar weight of hydroxypropyl acrylate is equal to that of diphenylmethane diisocyanate MDI, react at a temperature of 55°C for 3h to obtain a half-blocked isocyanate MDI·HPA monomer.

Embodiment 3

[0045] The difference between this embodiment and the first embodiment is that in the formula composition of the hyperbranched UV-curable coating, the reactive monomer diluent is only monofunctional HEMA (hydroxypropyl methacrylate).

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Abstract

The invention discloses a hyperbranched ultraviolet cured coating, which comprises the following raw materials by weight: 65-80 percent of acrylic ester terminal hyperbranched polyurethane, 15-33.5 percent of an active monomer diluent, 0.5-2 percent of a photoinitiator, and 1-3 percent of a flatting agent. Moreover, the invention also discloses a preparation method of the hyperbranched ultraviolet cured coating. The hyperbranched ultraviolet cured coating has the characteristics of being low in viscosity, high in reactivity, high in solubility, good in intermiscibility and the like, can improve the construction environment, can be rapidly cured and is good in physical and chemical properties of a coating film, and is suitable for indoor and outdoor utilization.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a hyperbranched ultraviolet light curing coating and a preparation method thereof. Background technique [0002] UV-curable coatings use ultraviolet light as the radiation curing light source, and the photoinitiator in the coating absorbs the ultraviolet light energy to form free radicals, thereby initiating the polymerization and cross-linking reaction of the resin and active monomers, so that the liquid coating film can be cured. This UV-curable coating does not require heating, and can quickly cure and form a film on flammable substrates such as paper, plastic, leather and wood. Therefore, compared with other types of coatings, it has the advantages of no pollution, fast curing speed, low curing temperature Low energy consumption, high production efficiency, low volatile matter, environmental protection and energy saving, excellent coating performance, etc., good friction res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/16C08G18/42
Inventor 肖文清陈建军张健臻刘光华陈何国黄恒超
Owner GUANGZHOU BAIYUN CHEM IND
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