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Fluorine-silicon modified multifunctional linseed oil-based alkyd resin UV curing coating and preparation and application thereof

A technology of fluorosilicon modification and alkyd resin, which is applied in the direction of polyester coatings and coatings, can solve the problems of low coating hardness, cumbersome synthesis process, and long curing time, and achieve high reactivity, wide sources, The effect of improving mechanical properties

Active Publication Date: 2021-07-16
SHANTOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the general self-drying alkyd coating has a long curing time and the coating hardness is not high
[0004] Existing vegetable oil-based alkyd resin coatings, such as the invention patent CN 201510516293.3 "a silicone epoxy acrylic modified water-based alkyd resin emulsion and its coating", Disclosed is a water-based alkyd resin coating obtained by esterifying hydroxylated vegetable oil and then modifying it with epoxy resin, acrylate, etc. The synthesis process is cumbersome and wastes resources

Method used

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  • Fluorine-silicon modified multifunctional linseed oil-based alkyd resin UV curing coating and preparation and application thereof
  • Fluorine-silicon modified multifunctional linseed oil-based alkyd resin UV curing coating and preparation and application thereof
  • Fluorine-silicon modified multifunctional linseed oil-based alkyd resin UV curing coating and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. A preparation method of fluorosilicon-modified multifunctional linseed oil-based UV-curable alkyd resin oligomer

[0036] Such as figure 1 As shown, it mainly includes the following steps:

[0037] (1) Add 20g of refined linseed oil to a 250mL three-necked flask, install a mechanical stirrer, a spherical condenser, and a nitrogen port, add 6.2g of pentaerythritol, stir and heat up to 120°C, add 4wt% lithium hydroxide as a catalyst, and Nitrogen, react at 210°C for 3 hours until the ethanol tolerance is 5, add an appropriate amount of phosphoric acid to neutralize lithium hydroxide, and lower the temperature to obtain linseed oil-based polyol (intermediate product I). The FT-TR spectra of linseed oil and linseed oil polyols are as follows figure 2 As shown, its infrared characteristic absorption peak data is as follows: IR: 2950cm -1:-CH 3 Existence; 2860cm -1 :-CH 2 Existence; 1740cm -1 : linseed oil-C=O exists; 3400cm -1 :-OH exists.

[0038] (2) Cool the ...

Embodiment 2

[0044] 1. A preparation method of fluorosilicon-modified multifunctional linseed oil-based UV-curable alkyd resin oligomer

[0045] Such as figure 1 As shown, it mainly includes the following steps:

[0046] (1) Add 20g of refined linseed oil to a 250mL three-necked flask, install a mechanical stirrer, a spherical condenser, and a nitrogen port, add 6.8g of pentaerythritol, stir and heat up to 120°C, add 5% wt of lithium hydroxide as a catalyst, Nitrogen, react at 220°C for 2 hours until the ethanol tolerance is 5, add an appropriate amount of phosphoric acid to neutralize lithium hydroxide, and cool down to obtain linseed oil-based polyol (intermediate product I);

[0047] (2) The linseed oil-based polyol obtained above is lowered to about 150°C, and 10wt% of the reflux solvent xylene is added as a water-carrying agent, and 6.4g of isophthalic acid is added, and the temperature is raised to 190°C for 1 hour, and then heated to React at 225°C for 4 hours, stop the reaction w...

Embodiment 3

[0053] 1. A preparation method of fluorosilicon-modified multifunctional linseed oil-based UV-curable alkyd resin oligomer

[0054] Such as figure 1 As shown, it mainly includes the following steps:

[0055] (1) Add 20g of refined linseed oil to a 250mL three-necked flask, install a mechanical stirrer, a spherical condenser, and a nitrogen port, add 6.5g of pentaerythritol, stir and heat up to 120°C, add 4wt% lithium hydroxide as a catalyst, and Nitrogen, react at 240°C for 1.5h until the ethanol tolerance is 5, add an appropriate amount of phosphoric acid to neutralize lithium hydroxide, and cool down to obtain linseed oil-based polyol (intermediate product I);

[0056] (2) Lower the linseed oil-based polyol prepared above to about 150°C, add 8wt% reflux solvent xylene as a water-carrying agent, add 5.4g of isophthalic acid, heat up to 180°C, keep warm for 1h, and continue to heat up To 235°C, maintain this temperature for 3 hours until the acid value is lower than 0.5mgKOH...

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Abstract

The invention relates to a fluorine-silicon modified multifunctional linseed oil-based alkyd resin UV curing coating which comprises a fluorine-silicon modified multifunctional linseed oil-based UV curing alkyd resin oligomer, a reactive diluent and a photoinitiator in a mass ratio of (40-55): (20-45): (3-10), and also comprises a flatting agent, a defoaming agent and the like. The preparation method of the fluorine-silicon modified multifunctional linseed oil-based UV-cured alkyd resin oligomer comprises the following steps: uniformly mixing linseed oil, pentaerythritol and an alcoholysis catalyst; then carrying out esterification reaction with dibasic acid or dibasic anhydride; then reacting with fluorosiloxane; and finally, uniformly mixing with acryloyl chloride, an acid-binding agent and a polymerization inhibitor at low temperature, and reacting at room temperature. The linseed oil is a rich natural resource, is wide in source, low in cost, easy to obtain, green, environment-friendly and biodegradable. The prepared coating film has good hardness, adhesive force, flexibility, hydrophobicity and chemical resistance, the light curing time is short, the coating efficiency is high, high efficiency, energy conservation and emission reduction are achieved, and the industrial application prospect is large.

Description

technical field [0001] The invention belongs to the technical field of UV curing coatings, and in particular relates to a fluorosilicon-modified multifunctional linseed oil-based alkyd resin UV curing coating as well as its preparation and application. Background technique [0002] UV-curable coating is a green and environmentally friendly coating, which conforms to the "5E" principle and has the advantages of environmental friendliness, economy, high efficiency, energy saving and wide adaptability. It is widely used in optical fiber coating, printing, wood, automotive industry, aerospace and other fields have huge market potential. Traditional UV-curable coatings are mainly petroleum-based products, which have problems such as resource crisis, environmental pollution, energy consumption and waste disposal difficulties. Therefore, combining bio-renewable resources with UV curing technology to develop vegetable oil-based UV curing resins and coatings is a "green+green" solut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91C08G63/49C09D167/08
CPCC08G63/914C08G63/48C09D167/08
Inventor 陈汉佳王艺思石旭华
Owner SHANTOU UNIV
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