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Multifunctional epoxy vegetable oil-based UV curing prepolymer and its preparation method and application

A technology of multifunctional epoxy and epoxy vegetable oil, which is applied in application, epoxy resin coating, modified epoxy resin adhesive, etc., can solve the problems of application limitation, limited usage, low reactivity, etc., and achieve production The effect of low cost, reducing dependence and reducing consumption

Active Publication Date: 2021-03-26
SOUTH CHINA AGRI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, free radical photocurable materials are more widely used at present, and although vegetable oil also contains unsaturated double bonds, its reactivity is low, and its application in free radical photocurable material systems is limited.
Although there are many reports on the synthesis of vegetable oil-based UV-curable prepolymers, the molecular weight of the prepolymers synthesized by them is not large, and the general molecular weight does not exceed 1500. Regarding the vegetable oil-based UV with larger molecular weight and higher vegetable oil content The preparation of cured prepolymer has not been reported
Although the currently prepared vegetable oil-based UV-curable prepolymers with smaller molecular weights can also be cured into films, but because of the short molecular chains between double bonds, the cured coating films are relatively brittle and have poor flexibility. Add a certain amount of petroleum-based UV-curable prepolymer to modify it to obtain a coating film with better comprehensive properties, which limits the industrial use of vegetable oil-based UV-curable prepolymer to a certain extent

Method used

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  • Multifunctional epoxy vegetable oil-based UV curing prepolymer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of epoxidized soybean oil-ricinoleic acid-based UV-curable prepolymer:

[0036] (1) Add 5 parts of epoxidized soybean oil (purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.), triethylamine and acetone successively in a four-neck flask with a mechanical stirring device, a condensing reflux device and a thermometer (amounts of 0.5% and 1 times of the total mass of epoxy vegetable oil and vegetable oleic acid) after stirring evenly, the oil bath is heated to 120 ℃ for insulation, and 20 parts of ricinoleic acid (purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.) is added dropwise, and the flow rate of adding It is 1 drop per second. After the dropwise addition is completed, keep warm and continue to react for 5 hours. After the reaction is completed, filter while it is hot, transfer the liquid to a separatory funnel and dissolve it with petroleum ether. Wash three times respectively with saturated sodium bicarbonate solution and sa...

Embodiment 2

[0039] Preparation of epoxy soybean oil-soybean oleic acid based UV curing prepolymer:

[0040] (1) Add 10 parts of epoxidized soybean oil (purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.), N,N-dimethylethanolamine and Butanone (the amount is 1% and 3 times of the total mass of epoxy vegetable oil and vegetable oleic acid, respectively) was stirred evenly, the oil bath was heated to 110°C to keep warm, and 60 parts of soybean oleic acid (purchased from Shanghai Lisen Chemical Co., Ltd.) was added dropwise. , The dropping flow rate is 10 drops per second. After the dropping is completed, keep warm and continue to react for 5 hours. After the reaction is completed, filter while hot, transfer the liquid to a separatory funnel and dissolve it with petroleum ether. Wash three times respectively with saturated sodium bicarbonate solution and saturated sodium chloride solution, separate liquids to obtain the upper organic phase, then dry and filter the organic phase ...

Embodiment 3

[0043] Preparation of epoxidized soybean oil-tungoleic acid-based UV-curable prepolymer:

[0044] (1) Add 5 parts of epoxidized soybean oil (purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.), triethylamine and tetrahydrofuran (amounts of 0.7% and 2 times of the total mass of epoxy vegetable oil and vegetable oleic acid) after stirring evenly, the oil bath is heated to 130 ℃ of insulations, and 30 parts of tungoleic acid (purchased from Shandong Greentown Chemical Co., Ltd.) are added dropwise, and the dripping flow rate is 5 seconds per second. After the dropwise addition is completed, keep warm and continue to react for 5 hours. After the reaction is completed, filter while hot, transfer the liquid to a separatory funnel and dissolve it with petroleum ether. Wash three times respectively with saturated sodium bicarbonate solution and saturated sodium chloride solution, separate liquids to obtain the upper organic phase, then dry and filter the organic phase wi...

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Abstract

The invention discloses a multifunctional epoxy vegetable oil-based UV curing prepolymer as well as its preparation method and application. The preparation method comprises the following steps: uniformly mix epoxy vegetable oil, catalyst and reaction solvent, heat and keep warm, add vegetable oleic acid dropwise, after the dropwise addition, keep warm and continue to react to obtain an intermediate product; mix the intermediate product, double bond monomer, catalyst , a polymerization inhibitor and a reaction solvent are uniformly mixed, and reacted at 60-70° C. for 1-5 hours to obtain a multifunctional epoxy vegetable oil-based UV-curable prepolymer. The UV curing prepolymer prepared by the present invention has the advantages of high functionality, large molecular weight, fast curing speed, excellent mechanical properties after film formation, strong chemical resistance, good biodegradability, etc., and has high UV curing activity. The required UV curing energy is less than or equal to 1500mJ·cm ‑2 , The cured film has excellent performance and can meet the application requirements of UV curable materials.

Description

technical field [0001] The invention belongs to the technical field of UV curing materials, and in particular relates to a multifunctional epoxy vegetable oil-based UV curing prepolymer and its preparation method and application. Background technique [0002] As a renewable resource, natural vegetable oil has a wide range of sources, is easy to regenerate, is cheap, and has certain chemical reactivity. It fully has the structural basis to replace petrochemical-based raw materials and prepare polymer materials. At present, vegetable oil derivatives such as epoxidized soybean oil, epoxidized castor oil, and castor oil-based polyols have been industrialized and commercialized, and are gradually replacing petrochemical raw materials in the field of polymer materials. UV-curable coatings and water-based coatings are two types of environmentally friendly coatings that are currently being vigorously developed, and are gradually replacing solvent-based coatings. Castor oil-based po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/16C08G59/17C09D163/10C09D11/101C09D11/102C09J163/10
CPCC08G59/1433C08G59/1466C08G59/1472C08G59/1494C09D11/101C09D11/102C09D163/10C09J163/10
Inventor 袁腾尹鉴肖亚亮李小平杨卓鸿
Owner SOUTH CHINA AGRI UNIV
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