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Unsaturated polyester gel coat resin capable of being subjected to UV-LED photocuring and paint preparation method thereof

A technology of gel coat resin and polyester coating, which is applied in the field of unsaturated polyester coating and its preparation, can solve the problems of poor acid and alkali resistance, large shrinkage rate, and easy orange peel of unsaturated polyester, so as to increase the turnover Link density, reduce volume shrinkage, improve the effect of coating rigidity

Active Publication Date: 2016-04-20
GUANGDONG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the unsaturated polyester gel coat resin has the problem of large shrinkage, especially when it is prepared into a thick film, which will easily cause orange peel and other phenomena when the paint film is formed, and the unsaturated polyester prepared by the conventional method is resistant to acid and alkali poor

Method used

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  • Unsaturated polyester gel coat resin capable of being subjected to UV-LED photocuring and paint preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]Add 5.0g of triphenyl phosphite, 2.0g of sodium hypophosphite, 424.0g of diethylene glycol, 27.2g of pentaerythritol, and 355.6g of phthalic anhydride in sequence, and then add the electric stirring, water separator, thermometer, In the reaction vessel heated by the electric heating mantle, after heating to 100-110°C, start to stir slowly for half an hour, then raise the temperature to 160°C, react for 2 hours, cool down to 100°C and add 156.9g of maleic anhydride, the molar ratio of phthalic anhydride to maleic anhydride 3:2, react at constant temperature for 1 hour, raise the temperature to 195±2°C and react until the acid value is below 40mgKOH / g, add 0.5g hydroquinone, cool down to 95±1°C, slowly drop in 98.1g and mix in 0.6g Triphenyl phosphite, glycidyl methacrylate of 1.2g N,N'-dimethyl benzylamine is capped, and after the drop-in is completed, the temperature is slowly raised to 104±0.5°C, and the reaction is when the acid value is below 10mgKOH / g When the temper...

Embodiment 2

[0041] Put 5.0g of triphenyl phosphite, 2.0g of sodium hypophosphite, 381.6g of diethylene glycol, 36.8g of glycerol, and 370.0g of phthalic anhydride into the equipment equipped with electric stirring and water separator in sequence. , thermometer, electric heating mantle heating reaction vessel, after heating to 100-110°C, start to stir slowly for half an hour, then raise the temperature to 160°C, react for 2 hours, cool down to 100°C, add 98.0g maleic anhydride, phthalic anhydride and maleic anhydride The molar ratio is 2.5:1, react at constant temperature for 1 hour, raise the temperature to 195±2°C and react until the acid value is below 30mgKOH / g, add hydroquinone, cool down to 95±1°C, slowly drop in 74.3g and mix with 0.34 g triphenyl phosphite, 0.6g N, N-dimethyl phenylamine glycidyl methacrylate for end-capping, slowly heat up to 104±0.5°C after the drop-in is completed, and react until the acid value is below 10mgKOH / g When the temperature drops below 85°C, add 286.0...

Embodiment 3

[0044] Add 5.0g of triphenyl phosphite, 2.0g of sodium hypophosphite, 296.8g of diethylene glycol, 27.2g of pentaerythritol, and 370g of phthalic anhydride, and add them in sequence with electric stirring, water separator, thermometer, In the reaction vessel heated by the electric heating mantle, after heating to 100-110°C, start to stir slowly for half an hour, then raise the temperature to 160°C, react for 2 hours, cool down to 100°C and add 98g of maleic anhydride, the molar ratio of phthalic anhydride to maleic anhydride is 1:1, constant temperature reaction for 1 hour, heat up to 195±2°C and react until the acid value is below 90mgKOH / g, add hydroquinone, cool down to 95±1°C, slowly drop in 223.4g and mix with 0.6g triphosphite Phenyl ester, 1.2g N,N'-dimethyl benyl amine glycidyl methacrylate for end-capping, after the drop-in is completed, the temperature is slowly raised to 104±0.5°C, and when the acid value is below 10mgKOH / g, the temperature is lowered to When the te...

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Abstract

The invention discloses unsaturated polyester gel coat resin capable of being subjected to UV-LED photocuring and a paint preparation method thereof. The unsaturated polyester paint is prepared from 90-100 parts of unsaturated polyester gel coat resin, 10-30 parts of activated thinner, 1-5 parts of photoinitiator, 1-3 parts of coinitiator, 0-20 parts of talcum powder, 0-0.5 part of dispersing auxiliary and 0.5-3 parts of other auxiliaries. The weight ratio of photoinitiator to coinitiator is (1-5):(1-3), and unsaturated polyester gel coat resin is a mixture of acrylate-terminated unsaturated polyester and activated thinner. A coating can be prepared from the paint through the UV-LED photocuring technology, deep solidification of a film 200 micrometers thick on a woodware base material can be achieved, and the coating is low in shrinkage rate, good in acid resistance and alkaline resistance, high in luster and good in adhesive force.

Description

technical field [0001] The invention relates to photocurable coatings, more specifically to an unsaturated polyester coating that can be cured by UV-LED light and a preparation method thereof. Background technique [0002] UV-curing (UV-curing) is the use of medium and short-wave ultraviolet light under UV radiation, and the photoinitiator in the liquid UV material is converted into free radicals or cations by irradiation, thereby initiating the polymerization and crosslinking of resins containing active functional groups. Insoluble and infusible solid coating process, UV curing technology is widely used in coatings, inks, adhesives and other fields due to its advantages of high efficiency, economy, energy saving, wide applicability, and environmental friendliness. However, the existing UV curing methods using mercury lamps and halogen lamps still have many defects, and a better curing method needs to be sought. UV-LED (UVlight emitting diode) curing refers to the use of LE...

Claims

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Application Information

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IPC IPC(8): C08G63/20C08G63/54C08G63/47C09D167/07
CPCC08G63/20C08G63/47C08G63/54C09D167/07
Inventor 刘晓暄苏嘉辉陈富强余桐柏卫福海
Owner GUANGDONG UNIV OF TECH
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