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A kind of preparation method based on acetoacetate modified castor oil cured coating

A technology of acetoacetate and tert-butyl acetoacetate is applied in the field of new curing systems to achieve the effects of good sustainability, simple coating curing and mild conditions

Active Publication Date: 2022-03-11
JIANGXI SCI & TECH NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Castor oil and tert-butyl acetoacetate are transesterified to prepare acetoacetified castor oil, which can undergo Michael addition reaction with double bonds to prepare coatings. According to literature reports, no modified plant-based and double bonds have been seen so far. Preparation of coating by Michael addition reaction

Method used

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  • A kind of preparation method based on acetoacetate modified castor oil cured coating
  • A kind of preparation method based on acetoacetate modified castor oil cured coating
  • A kind of preparation method based on acetoacetate modified castor oil cured coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Take a 30*50 weighing bottle and fill it with acylated castor oil (1.5g, 1.265mmol), add a stir bar and 10ml of tetrahydrofuran, put it on an oil bath and stir to completely dissolve the acylated castor oil, then add Bismale imide (0.68g, 1.8975mmol), add triethylamine (60ul, 0.431mmol) with a pipette gun, cover the lid, stir until the solids are all dissolved, pour the system into the mold, seal it with a plastic bag, Place in a fume hood to cure. (Wherein the functional ratio of acylated castor oil and bismaleimide is 1:1, and the quality of catalyst triethylamine is 2% of the total mass of acylated castor oil and bismaleimide).

Embodiment 2

[0039] Take a 30*50 weighing bottle and fill it with acylated castor oil (1.5g, 1.265mmol), add a stir bar and 10ml of tetrahydrofuran, put it on an oil bath and stir to completely dissolve the acylated castor oil, then add Bismale Imide (0.68g, 1.8975mmol), add triethylenediamine (43.37mg, 0.387mmol) with a pipette gun, cover the lid, stir until the solid is completely dissolved, pour the system into a mold, seal it with a plastic bag Live and cure in a fume hood. (wherein the functional ratio of acylated castor oil and bismaleimide is 1:1, and the mass of the catalyst triethylenediamine is 2% of the total mass of acylated castor oil and bismaleimide).

Embodiment 3

[0041] Take a 30*50 weighing bottle and fill it with acylated castor oil (1.5g, 1.265mmol), add a stir bar and 10ml of tetrahydrofuran, put it on an oil bath and stir to completely dissolve the acylated castor oil, then add Bismale Imide (0.68g, 1.8975mmol), add DBU (40.21ul, 0.285mmol) with a pipette gun, cover the lid, stir until the solid is completely dissolved, pour the system into the mold, seal it with a plastic bag, and put Cured in a fume hood. (wherein the functional ratio of acylated castor oil and bismaleimide is 1:1, and the mass of catalyst DBU is 2% of the total mass of acylated castor oil and bismaleimide).

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PUM

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Abstract

The invention discloses a method for preparing a cured coating based on acetoacetate modified castor oil. The method uses castor oil and tert-butyl acetoacetate as raw materials, and toluene as a solvent. Under the protection of nitrogen flow, reflux reaction ( 130° C.) for 6 h to obtain acetoacetate-modified castor oil. Then, acetoacetate modified castor oil and N,N-(4,4-methylenediphenyl)bismaleimide undergoes Michael addition reaction at room temperature, and solidifies to form a film. The invention introduces a novel room-temperature curing system based on vegetable oil, which can be used for the preparation of coatings, and has mild reaction conditions. The castor oil in the raw material is renewable vegetable oil, which is cheap and meets the requirements of sustainable development.

Description

technical field [0001] The invention discloses a method for preparing a cured coating based on acetoacetate modified castor oil, relates to a novel cured system of a modifiable plant base, and belongs to the field of polymer coatings. Background technique [0002] At this stage, coatings have penetrated into almost all aspects of production and life. It can be said that coatings exist wherever materials are used. With the improvement of people's living standards and the increasing concern and demand for environmentally friendly coatings, the development of renewable coating resins has become a hot spot in the field of coating research. At present, most of the starting materials for the production of coating resins are petrochemical products. Although the product sources are extensive and the supply is stable, they are not sustainable. In the case of depletion of petroleum resources and rising prices, the use of renewable It is of great significance to develop new curing res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D191/00C11C3/10
CPCC09D191/00C11C3/10
Inventor 高飞申亮徐冬冬付长清刘旭刘崇文
Owner JIANGXI SCI & TECH NORMAL UNIV