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Modified waterborne polyester resin with high dicyclopentadiene content as well as preparation method and application thereof

A technology of water-based polyester resin and dicyclopentadiene, applied in polyester coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of low dicyclopentadiene content and no reports, and achieve good water release Effect

Active Publication Date: 2020-05-29
广东鲸鲨化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the amount of dicyclopentadiene that this work uses on the one hand is few (in the non-volatile matter, the highest consumption is 14.7%), on the other hand this work can not be the solution of the problem that exists about water-based paint in the technical background of the present invention, provides Effective methods for reference
[0007] In addition, dicyclopentadiene modified waterborne polyester resin has not yet been reported

Method used

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  • Modified waterborne polyester resin with high dicyclopentadiene content as well as preparation method and application thereof
  • Modified waterborne polyester resin with high dicyclopentadiene content as well as preparation method and application thereof
  • Modified waterborne polyester resin with high dicyclopentadiene content as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] S1: Put in dicyclopentadiene ①, p-methoxyphenol, maleic anhydride ①, feed nitrogen, stir and heat up to 115-120°C and keep it, start to add water ①, dropwise time 0.5h, the water dropwise addition is completed Afterwards, continue to insulate and react at 115~120 ℃ until the acid value of the material is equal to 197.4mgKOH / g (the half-esterification rate of maleic anhydride is 98.8%), and the temperature is lowered;

[0033] S2: Add trimellitic anhydride, dimethylol propionic acid, dimethylol butyric acid and maleic anhydride ②, and heat up to 160-165°C for 0.75h without reflux through a water separator;

[0034] S3: Drop in maleic acid ③, phthalic anhydride, glycerin, trimethylolpropane, pentaerythritol, use methyl isobutyl ketone as reflux solvent, raise the temperature to 165~195℃ and reflux dehydration reaction through water separator; The acid value of the obtained material is reduced to 63.5mgKOH / g, and the temperature is lowered;

[0035] S4: Add dicyclopentadi...

Embodiment 2

[0038] S1: Add dicyclopentadiene ①, p-methoxyphenol and maleic anhydride ①, feed nitrogen, stir and heat up to 105-110°C and keep it there, start to add water dropwise for 1.5 hours, after the addition of water dropwise, Continue the heat preservation reaction at 110-115°C until the measured acid value of the material is equal to 201.6mgKOH / g (half-esterification rate of maleic anhydride is 98.9%), then cool down;

[0039] S2: Throw in trimellitic anhydride, dimethylolpropionic acid and maleic anhydride ②, heat up to 155-160°C, reflux and keep warm for 1.5 hours without water separator;

[0040] S3: Drop in phthalic anhydride, diethylene glycol, glycerin, and trimethylolpropane, use methyl isobutyl ketone as the reflux solvent, and heat up to 165-195°C to reflux through the water separator for dehydration reaction; when the acid value of the material drops To 62.2mgKOH / g, lower the temperature;

[0041] S4: Add dicyclopentadiene② and p-toluenesulfonic acid, raise the temperat...

Embodiment 3

[0044] S1: Put in dicyclopentadiene ①, p-methoxyphenol and maleic anhydride ①, pass in nitrogen gas, stir and raise the temperature to 110-115°C and keep it, start to add water dropwise for 1 hour, after the addition of water dropwise, continue Insulate and react at 110-115°C until the measured acid value of the material is equal to 201.8mgKOH / g (half-esterification rate of maleic anhydride is 98.7%), then cool down;

[0045] S2: Throw in trimellitic anhydride, dimethylolpropionic acid and maleic anhydride ②, heat up to 155-160°C, reflux and keep warm for 1.5 hours without water separator;

[0046] S3: Drop in adipic acid, phthalic anhydride, maleic anhydride③, glycerol, trimethylolpropane, use methyl isobutyl ketone as a reflux solvent, heat up to 165-195°C and reflux through a water separator for dehydration; When the acid value of the material drops to 64.2mgKOH / g, lower the temperature;

[0047] S4: Add dicyclopentadiene ② and p-toluenesulfonic acid, raise the temperature...

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Abstract

The invention discloses a modified waterborne polyester resin with a high dicyclopentadiene content as well as a preparation method and application thereof. A dicyclopentadiene structure is introducedinto the resin through various ways such as hydrolysis semi-esterification, addition and end capping, so that the content of dicyclopentadiene in non-volatile components of the resin is more than orequal to 40wt% and is at a higher level than that of a reported dicyclopentadiene modified resin; trihydric alcohol and tetrahydric alcohol are used, thus the resin has a branched structure and a higher molecular weight; a structure similar to a gemini surfactant is introduced, the resin is endowed with good water dilutability and wettability. Due to a high dicyclopentadiene content, a high unsaturation degree, a high molecular weight, good water dilutability and good wettability, the resin can be used for preparing a waterborne paint that can be cured under the initiation of free radicals ornon free radicals, and the waterborne paint is endowed with a better water release property, a curing property, corrosion resistance and complex surface coating adaptability.

Description

technical field [0001] The invention belongs to the field of resins and coatings, and in particular relates to a modified water-based polyester resin with high dicyclopentadiene content for water-based coatings that are cured by free radicals or non-radicals and a preparation method thereof. The resin can improve the water release, curability, corrosion resistance and complex surface coating adaptability of water-based coatings during application, and can be used as the main film-forming substance to prepare free-radical-induced or non-free-radical-induced curing Air-drying or baking or photoinitiated curing, one-component or two-component or three-component water-based coatings. Background technique [0002] In response to social development and environmental protection requirements, the coatings industry has developed well, and water-based coatings have become one of the main directions of coating development today, and good progress has been made. However, due to the nee...

Claims

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Application Information

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IPC IPC(8): C08G63/60C08G63/87C09D175/14C09D167/06C09D5/08C08G18/42
CPCC08G63/60C08G63/87C09D175/14C09D167/06C09D5/08C08G18/4286
Inventor 张远召钟石祥
Owner 广东鲸鲨化工有限公司
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