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A kind of modified waterborne polyester resin with high dicyclopentadiene content and its preparation method and application

A technology of water-based polyester resin and dicyclopentadiene, which is applied in the field of resins and coatings, and can solve the problems of low dicyclopentadiene content and no reports, etc.

Active Publication Date: 2022-05-24
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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  • A kind of modified waterborne polyester resin with high dicyclopentadiene content and its preparation method and application
  • A kind of modified waterborne polyester resin with high dicyclopentadiene content and its preparation method and application
  • A kind of modified waterborne polyester resin with high dicyclopentadiene content and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] S1: put in dicyclopentadiene①, p-methoxyphenol, maleic anhydride①, introduce nitrogen, stir and heat up to 115~120℃ and keep it, start to drip water①, the dripping time is 0.5h, and the water dropwise addition is completed Then, continue to keep the reaction at 115~120℃ until the acid value of the material is measured to be equal to 197.4mgKOH / g (the half-esterification rate of maleic anhydride is 98.8%), and then the temperature is lowered;

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

[0034] S3: Cool down and put in maleic acid ③, phthalic anhydride, glycerol, trimethylolpropane, pentaerythritol, use methyl isobutyl ketone as a reflux solvent, heat up to 165~195 ℃ and conduct a reflux dehydration reaction through a water separator; The acid value of the obtained material was reduced to 63.5mgKOH / g, and the temperature ...

Embodiment 2

[0038] S1: Throw in dicyclopentadiene①, p-methoxyphenol and maleic anhydride①, introduce nitrogen, stir and heat up to 105-110°C and keep it, start dripping water for 1.5h, after the water is added dropwise, Continue to keep the reaction at 110~115°C until the acid value of the material is measured to be equal to 201.6 mgKOH / g (the half-esterification rate of maleic anhydride is 98.9%), and cool down;

[0039] S2: Throw in trimellitic anhydride, dimethylolpropionic acid and maleic anhydride ②, heat up to 155-160°C, and react for 1.5h without refluxing through a water separator;

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

[0041] S4: add dicyclopentadiene ② and p-toluenesulfonic acid, heat up to 130~135...

Embodiment 3

[0044] S1: put in dicyclopentadiene①, p-methoxyphenol and maleic anhydride①, introduce nitrogen, stir and heat up to 110-115°C and keep it, start dripping water for 1h, after the water is added dropwise, continue Incubate the reaction at 110~115°C until the acid value of the material is measured to be equal to 201.8 mgKOH / g (the half-esterification rate of maleic anhydride is 98.7%), and then cool down;

[0045] S2: Throw in trimellitic anhydride, dimethylolpropionic acid and maleic anhydride ②, heat up to 155-160°C, and react for 1.5h without refluxing through a water separator;

[0046] S3: drop in adipic acid, phthalic anhydride, maleic anhydride ③, glycerol, trimethylolpropane, use methyl isobutyl ketone as a reflux solvent, be warming up to 165~195 ℃ through a water separator reflux dehydration reaction; When the measured acid value of the material drops to 64.2mgKOH / g, the temperature is lowered;

[0047] S4: add dicyclopentadiene ② and p-toluenesulfonic acid, heat up t...

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Abstract

The invention discloses a modified water-based polyester resin with high dicyclopentadiene content, a preparation method and application thereof. The dicyclopentadiene structure has been inserted into the dicyclopentadiene structure through hydrolysis, half-esterification, addition, and end-capping, so that the content of dicyclopentadiene in the non-volatile matter of the resin is ≥ 40wt%, which is different from that of dicyclopentadiene in existing reports. It is at a higher level compared with vinyl modified resins; trihydric alcohols and tetrahydric alcohols are used to make the resin have branched structure and higher molecular weight; Dilution, wettability. High dicyclopentadiene content and unsaturation, high molecular weight and good water dilutability and wettability, so that the resin can be used to formulate water-based coatings cured by radical initiation or non-radical initiation curing, and impart water-based Better water release, curing, anti-corrosion and complex surface coating adaptability of coatings.

Description

technical field [0001] The invention belongs to the field of resins and coatings, and particularly relates to a modified water-based polyester resin with high dicyclopentadiene content for water-based paints that can be cured by free radicals or cured by non-radicals, and a preparation method thereof. The resin can improve the water release, curing, anti-corrosion and complex surface coating adaptability of water-based coatings during application. Air-dry or bake or light-initiated curing, one- or two- or three-pack waterborne coatings. Background technique [0002] In response to social development and requirements for environmental protection, the coatings industry has developed well, and water-based coatings have become one of the main directions of today's coatings development, and good progress has been made. However, due to the need of water-based, on the one hand, the organic resin as one of the core materials of the coating must introduce a certain amount of hydroph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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