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Wear-resistant hybrid polyester acrylate UV coating

A technology of polyester acrylate and hybridization, which is applied in the field of hybrid polyester acrylate UV coatings and wear-resistant hybrid polyester acrylate resin UV coatings, and can solve system instability, difficulty in dispersion, and increase in system viscosity And other issues

Active Publication Date: 2021-01-05
JIANGSU LITIAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, adding inorganic fillers to the photocurable resin system can improve the hardness and wear resistance of the coating, but the dispersion and settlement of inorganic fillers in the photocurable resin system are difficult to solve, and there are the following three problems: first, inorganic Fillers generally have a larger particle size, and their density is larger than that of photocurable resins, which leads to rapid sedimentation of inorganic particles in the resin system. If inorganic fillers are directly added, the hardness and wear resistance of photocurable coatings cannot be increased; second, in theory , the sedimentation rate of nano-inorganic fillers in the photocurable resin system is negligible, but due to the extremely high surface energy of nanoparticles, it is difficult to disperse in the resin system and form aggregates, which leads to system instability; third, Generally, it is necessary to add a large amount of inorganic components to the photocurable resin system to obtain photocurable coatings with better hardness and wear resistance, which usually leads to increased viscosity of the system, phase separation of inorganic fillers in the system, coating defects and The problem of reduced coating adhesion

Method used

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  • Wear-resistant hybrid polyester acrylate UV coating
  • Wear-resistant hybrid polyester acrylate UV coating
  • Wear-resistant hybrid polyester acrylate UV coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048]In this example, modified silica nanoparticles were prepared by the nano-dispersion method, and dispersed into the polyester acrylate system in the form of a dispersion liquid to obtain a hybrid polyester acrylate UV coating. The hybrid polyester acrylate UV coating was composed of The composition of the following weight percentages:

[0049]

[0050]Among them, the sum of polyester acrylate oligomer, modified silica particles and reactive diluent is 100%, and the amount of photoinitiator, leveling agent, and defoamer is based on polyester acrylate oligomer, modified silica particles, and The total amount of silica particles and reactive diluent is added as a basis.

[0051]The polyester acrylate oligomer described in this embodiment is an aliphatic polyester hexaacrylate, the structure is shown in the following formula, and the molecular weight is 710.

[0052]

[0053]Aliphatic polyester hexaacrylate is prepared by the following method:

[0054]Put 1360 grams of pentaerythritol, 730 grams of ...

Embodiment 2

[0062]On the basis of the hybrid polyester acrylate UV coating of Example 1, the content of modified silica was increased to 20 wt%. The formula is as follows:

[0063]

[0064]The polyester acrylate oligomer, modified silica, reactive diluent, photoinitiator, leveling agent and defoaming agent in this embodiment are all the same as those in Example 1.

Embodiment 3

[0066]In this embodiment, an in-situ sol-gel method is adopted to obtain a uniformly dispersed hybrid polyester acrylate oligomer, and then the hybrid polyester acrylate oligomer is mixed with a reactive diluent and auxiliary agent, before the UV light initiation Add photoinitiator to obtain hybrid polyester acrylate UV coating. Hybrid polyester acrylate UV coating is composed of the following components by weight percentage:

[0067]

[0068]The active diluent, photoinitiator, leveling agent and defoamer are the same as in Example 1.

[0069]The preparation method of hybrid polyester acrylate oligomer is as follows:

[0070]Disperse 60g of tetraethyl orthosilicate in 108g of isopropanol / tetrahydrofuran mixed solution (the volume ratio of isopropanol to tetrahydrofuran is 1:1), and then mix with 120g of polyester acrylate resin oligomer (same as Example 1) After mixing, the polyester acrylate resin oligomer is dissolved in the isopropanol / tetrahydrofuran mixed liquid to obtain a homogeneous mix...

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Abstract

The invention discloses a wear-resistant hybrid polyester acrylate UV coating, which comprises the following components: a polyester acrylate oligomer, modified silicon dioxide, a reactive diluent, aphotoinitiator, a leveling agent and an antifoaming agent or a hybrid polyester acrylate oligomer, a reactive diluent, a photoinitiator, a leveling agent and an antifoaming agent, wherein the hybrid polyester acrylate oligomer is an in-situ hydrolysis polymerization product prepared from a silicon dioxide precursor in a polyester acrylate oligomer system by adopting an in-situ sol-gel method. Thetransparent silicon dioxide nanoparticles are prepared and modified to be matched with an ultraviolet curing resin system, so that the compatibility of the silicon dioxide nanoparticles and the lightcuring resin system is improved; and the hybrid polyester acrylate UV coating has low viscosity and low inorganic component addition quantity, the prepared coating has excellent hardness and wear resistance, and the hybrid polyester acrylate UV coating has great value in the fields of furniture such as floors, 3C products and other wear-resistant fields.

Description

Technical field[0001]The invention belongs to the field of light-curable resins and coatings, and relates to a wear-resistant hybrid polyester acrylate UV coating, in particular to a high-surface hardness resistant coating prepared by using modified silica nanoparticles and light-curing polyester acrylate resin. Ground hybrid polyester acrylate resin UV coating.Background technique[0002]Ultraviolet curing coating has the characteristics of 5E, which is an environmentally friendly and efficient coating. In recent years, UV-curable coatings have been widely used in packaging, furniture, electronics and automotive coatings. Traditional light-curable resins are mainly obtained by the grafting reaction of light-curable acrylate groups with polyurethane, polyester and epoxy resin. Light-curing resins are mainly composed of organic components, resulting in lower hardness and wear resistance after coatings, which hinder the application of light-curing resins in some fields. For example, in ...

Claims

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Application Information

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IPC IPC(8): C09D4/02C09D7/62
CPCC09D4/00C09D7/62
Inventor 胡剑飞张丽丽孙冠卿张越炜
Owner JIANGSU LITIAN TECH