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Preparation method and application of aqueous acrylic modified epoxy ester resin

A technology of epoxy ester resin and water-based acrylic, which is applied in the direction of coating, etc., can solve the problems of adhesion, water resistance, film-forming strength and other performance degradation, achieve the optimization of color matching and additive use, improve the degree of water-based, The effect of increasing carboxyl content

Inactive Publication Date: 2016-11-09
山东齐鲁漆业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the existing water-based resin cured coatings such as the decrease in adhesion, water resistance, and film-forming strength, and to provide a coating with high water solubility, excellent adhesion, high hydrolysis resistance, and high composition. High-performance water-based acrylic-modified epoxy ester resin with film strength and its water-based coatings enable water-based resins and coatings to exert excellent performance in more harsh application environments while reducing environmental pollution

Method used

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  • Preparation method and application of aqueous acrylic modified epoxy ester resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Put bisphenol A epoxy resin with a molar ratio of 1:1 and a monobasic acid or a dibasic acid in a three-necked flask, and add n-butanol and propylene glycol methyl ether with an equal mass ratio of 1:2 to 2:1 as Solvent, and dimethylethanolamine as catalyst, the amount of catalyst used is 1% to 2% of the mass of bisphenol A epoxy resin, the temperature is controlled by a constant temperature magnetic stirrer at 90 to 115°C, and the stirring speed is 600r / min for esterification When the acid value of the system drops to 5mgKOH / g, it is the end of the reaction. In addition, put a certain mass ratio of α-methacrylic acid, methyl methacrylate and n-butyl acrylate in another three-necked flask, and then add the same mass ratio of 1:1:1 to 2:2:1 n-butanol, propylene glycol methyl ether, butyl acetate as solvent, and azobisisobutyronitrile as initiator, n-dodecanethiol as chain transfer agent, the amount of initiator and chain transfer agent is α-methyl 1% to 2.5% of the mass...

Embodiment 2

[0023] A total of 30 parts of bisphenol A epoxy resin E-20 and n-octanoic acid with a molar ratio of 1:1 were placed in a three-necked flask, and an equal mass of n-butanol and propylene glycol methyl ether with a volume ratio of 1:2 was added as a solvent. And dimethylethanolamine is used as catalyzer, and the consumption of catalyzer is 1% of bisphenol A type epoxy resin quality, is 105 ℃ by constant temperature magnetic stirrer control temperature, and stirring speed is 600r / min to carry out esterification reaction, system acid value drops When reaching 5mgKOH / g, it is the end of the reaction. In addition, a total of 60 parts of α-methacrylic acid, methyl methacrylate and n-butyl acrylate with a mass ratio of 2:1:1 were placed in another three-necked flask, and the same amount of : 1 n-butanol, propylene glycol methyl ether, butyl acetate as solvent, and azobisisobutyronitrile as initiator, n-dodecanethiol as chain transfer agent, the consumption of initiator and chain tran...

Embodiment 3

[0026]Put 40 parts of bisphenol A epoxy resin E-20 and adipic acid with a molar ratio of 1:1 in a three-necked flask, and add the same mass of n-butanol and propylene glycol methyl ether with a volume ratio of 2:1 as a solvent , and dimethylethanolamine as a catalyst, the amount of the catalyst is 2% of the mass of bisphenol A type epoxy resin, the temperature is controlled by a constant temperature magnetic stirrer to be 90 ° C, and the stirring speed is 600r / min to carry out the esterification reaction, the acid value of the system When it drops to 5mgKOH / g, it is the end of the reaction. In addition, a total of 70 parts of α-methacrylic acid, methyl methacrylate and n-butyl acrylate with a mass ratio of 1:1:1 were placed in another three-necked flask, and the same mass ratio of 2:2 : 1 n-butanol, propylene glycol methyl ether, butyl acetate as solvent, and azobisisobutyronitrile as initiator, n-dodecanethiol as chain transfer agent, the consumption of initiator and chain tr...

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Abstract

The invention discloses a preparation method of aqueous acrylic modified epoxy ester resin, and an application of the prepared epoxy ester resin in the preparation of a coating. Epoxy resin is modified with acrylic acid through a double esterification technology, and the primary esterification reaction blocks one epoxy group of epoxy resin to prevent a cyclization gel reaction caused by the simultaneous opening reaction of two epoxy groups in the later acrylic modification process; and the second esterification reaction in the double esterification technology is the reaction of a pre-polymerized acrylic polymer and pre-esterified epoxy resin, so the carboxyl content after a grafting reaction is greatly increased, thereby the waterborne degree of the above product is improved.

Description

technical field [0001] The invention relates to the field of water-based epoxy ester resin, in particular to a preparation method of water-based acrylic modified epoxy ester resin and its application in coatings. technical background [0002] Due to the low amount of organic solvent used in water-based coatings, it can not only alleviate the consumption of petroleum resources, but also greatly reduce VOC emissions, and has become a research hotspot for various environmentally friendly coatings. The water-based resin is implemented by introducing polar groups into the system, which will correspondingly reduce the adhesion, water resistance, and film-forming strength of the cured coating. Therefore, how to improve the water solubility of the resin while ensuring the high-performance adhesion, water resistance, and film-forming strength of the cured coating is a key issue for the industrialization of water-based coatings. In recent years, the patent (CN1474838A) discloses a pr...

Claims

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Application Information

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IPC IPC(8): C08G81/02C08G59/14C08F220/06C08F220/14C08F220/18C09D187/00C09D129/04C09D7/12
CPCC08F220/06C08F220/14C08F220/18C08F220/1804C08G59/1438C08G59/1455C08G59/1494C08G81/024C08L2205/03C09D7/61C09D7/65C09D187/00C08L29/04C08L83/04
Inventor 孙光明孙文俊王庆军谢吉星武林华李丽段洪东
Owner 山东齐鲁漆业有限公司
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