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A kind of uv curing resin and its preparation method and the application in uv curing paint

A technology for curing resins and paints, applied in applications, household appliances, coatings, etc., can solve problems such as energy consumption, poor wetting of pigments and fillers, poor adhesion of coating films, etc., achieve good wettability, solve problems Difficult to cure, the effect of ensuring color uniformity

Active Publication Date: 2015-10-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pigments and fillers are added to the existing UV curing system to prepare colored paints. Due to the shielding effect of pigments and fillers on ultraviolet light, the coating system cannot be completely cured.
Therefore, most of the current UV-curable coatings are varnishes, and there are almost no pigments.
In addition, the existing UV curable resin does not wet the pigments and fillers well, and the adhesion of the coating film is not good, which limits the popularization and application of UV coatings.
Spray solvent-based polyurethane and other color paints first, and then apply UV varnish. This two-step construction process is used to prepare colored coatings. The construction is complicated, the cost is high, and the performance cannot meet the requirements.
There are also light and heat dual curing mechanisms to prepare UV curing paints, which require additional heating devices, consume energy, and the storage stability of the coatings is not good or requires two-component packaging

Method used

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  • A kind of uv curing resin and its preparation method and the application in uv curing paint
  • A kind of uv curing resin and its preparation method and the application in uv curing paint
  • A kind of uv curing resin and its preparation method and the application in uv curing paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. UV curable resin

[0031] (1) Preparation

[0032] (a) Add 70g of pentaerythritol, 74g of phthalic anhydride and 200g of linoleic acid into a reactor equipped with a thermometer, stirring paddle, reflux condenser and water separation device, add reflux solvent xylene, and react at 200°C for 6h , the acid value of the system was below 10mgKOH / g, and 282g alkyd resin was obtained by cooling down.

[0033](b) Mix 60g of hydroxyhexyl methacrylate and 110g of isophorone diisocyanate, add 0.3g of hydroquinone inhibitor and 0.5g of triethylamine to react at 80°C for 2 hours, and the mass fraction of hydroxyl groups is 0.3 %, make 170g acrylic modified polyurethane.

[0034] (c) React 170 g of the acrylic-modified polyurethane obtained above with 120 g of the alkyd resin prepared in step (a) at 80° C. for 3 hours to obtain 290 g of UV-curable resin.

[0035] (2) Performance, as shown in Table 1. The appearance is clear and transparent and the color is light, which is con...

Embodiment 2

[0052] 1. UV curable resin

[0053] (1) Preparation

[0054] (a) Add 90g of trimethylolpropane, 80g of isophthalic acid and 210g of oleic acid into a reactor equipped with a thermometer, a stirring paddle, a reflux condenser and a water separation device, add the reflux solvent xylene, and heat at 220°C After 5 hours of reaction, the acid value of the system was below 15 mgKOH / g, and 330 g of alkyd resin was obtained by cooling down.

[0055] (b) Mix 40g of hydroxyhexyl acrylate and 90g of isophorone diisocyanate, add 0.3g of hydroquinone inhibitor and 0.4g of dibutyltin dilaurate and react at 70°C for 2h, and the mass fraction of hydroxyl groups reaches 0.3 % or less, a semi-adduct containing an NCO group at one end is made.

[0056] (c) 130 g of the acrylic modified polyurethane prepared above was reacted with 120 g of the alkyd resin prepared in step (a) at 70° C. for 2.5 hours to obtain 250 g of the alkyd modified polyurethane acrylic resin.

[0057] (2) Performance, as...

Embodiment 3

[0082] 1. UV curable resin

[0083] (1) Preparation

[0084] (a) Add 30g of pentaerythritol, 20g of neopentyl glycol, 40g of phthalic anhydride and 130g of linolenic acid into a reactor equipped with a thermometer, stirring paddle, reflux condenser and water separator, and add the reflux solvent xylene, React at 210°C for 6 hours, the acid value of the system is below 15mgKOH / g, cool down and prepare 200g of alkyd resin for later use.

[0085] (b) Mix 20g of hydroxypropyl acrylate and 70g of isophorone diisocyanate, add 0.3g of hydroquinone polymerization inhibitor and 0.5g of triethylenediamine and react at 75°C for 2 hours, and the mass fraction of hydroxyl groups reaches 0.3%. Next, 90 g of a semi-adduct product containing an NCO group at one end was prepared.

[0086] (c) React 90 g of the acrylic-modified polyurethane semi-adduct obtained above with 110 g of the alkyd resin prepared in step (a) at 75° C. for 3 hours to obtain 200 g of UV curable resin.

[0087] (2) Per...

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Abstract

The invention discloses a UV curing resin, a preparation method thereof and the application of the UV curing resin in a UV curing colored paint. The preparation method comprises the following steps: mixing polyalcohol, polyacid and fatty acid at first, adding a reflow solvent to prepare alkyd resin, then mixing an ester compound and isophorone diisocyanate, adding a polymerization inhibitor and a catalyst, reacting to obtain acrylic acid modified polyurethane, reacting the acrylic acid modified polyurethane and the alkyd resin for 2-3 h at the temperature of 60-100 DEG C to obtain the YV curing resin, and performing reaction of the UV curing resin, an acrylic acid alkyl oxidation polyol ester active diluent, a pigment, thermoplastic acrylic resin, a photoinitiator, an alkyd resin drier, a dispersant, a foam agent and a flattening agent to obtain the UV curing colored paint. The invention solves the problems that as a pigment in a conventional ultraviolet light curing colored paint system shields ultraviolet light, the paint system can not be completely cured, and as the UV curing resin can not well moisten the pigment, and the coating adhesive force is poor.

Description

technical field [0001] The invention relates to a UV curable resin, in particular to a UV curable resin and its preparation method and application in UV curable color paint, belonging to the field of organic polymer compounds. Background technique [0002] UV-curable coatings have the advantages of fast curing, excellent coating performance, high efficiency, energy saving and environmental protection, and are suitable for assembly line operations. They are one of the main directions for the development of coatings in the world. UV curing technology is also widely used in inks, adhesives and electronic products. However, pigments and fillers are added to the existing UV curing system to prepare colored paints. Due to the shielding effect of pigments and fillers on ultraviolet light, the coating system cannot be completely cured. Therefore, most of the current UV-curable coatings are varnishes, with almost no pigments. In addition, the wetting of pigments and fillers by exis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/42C08G63/49C08G18/75C08G18/67C09D175/14C09D133/04C09D11/06
Inventor 瞿金清
Owner SOUTH CHINA UNIV OF TECH
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