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Sulfhydryl castor oil-based deep photocuring material and preparation method and application thereof

A light-curing material, castor oil-based technology, applied in the field of bio-based UV curable materials, can solve the problem of low light-curing activity of vegetable oil double bonds, and achieve the effect of overcoming the phenomenon of oxygen inhibition, uniform polymerization network, and delayed gel point.

Active Publication Date: 2019-06-25
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molecular structure of vegetable oil contains unsaturated double bonds, many of which also contain active reactive groups such as hydroxyl groups, which have the structural basis for building UV-curable material systems, but the photocuring activity of vegetable oil double bonds is very low. Unable to cure and form a film under the action of an initiator

Method used

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  • Sulfhydryl castor oil-based deep photocuring material and preparation method and application thereof
  • Sulfhydryl castor oil-based deep photocuring material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Add castor oil, p-toluenesulfonic acid and cyclohexane in sequence in the reactor, then install the water separator, stir evenly, heat up to 120°C, add mercaptoacetic acid, react for 11 hours, pour the reaction solution into the separator In the liquid funnel, add water to wash to remove excess thioglycolic acid, add cyclohexane to static layer, take the upper layer in a three-necked flask, add anhydrous magnesium sulfate to dry, and finally distill at 70°C under reduced pressure to obtain mercapto castor oil. Wherein, the molar ratio of castor oil and thioglycolic acid is 1:5, the consumption of p-toluenesulfonic acid is 6% of castor oil quality, and the cyclohexane consumption is 1g castor oil needs cyclohexane to be 4ml.

[0029] (2) Mix the mercapto castor oil and the photoinitiator 1173 uniformly under the condition of completely avoiding light, and the obtained prepolymer solution is the required mercapto castor oil-based deep photocurable material. Wherein, p...

Embodiment 2

[0032] (1) Add castor oil, p-toluenesulfonic acid and cyclohexane in sequence in the reactor, then install the water separator, stir evenly, heat up to 110°C, add 3-mercaptopropionic acid, react for 10h, and dissolve the reaction solution Pour into a separatory funnel, add water to wash to remove excess 3-mercaptopropionic acid, add cyclohexane to static layer, take the upper layer in a three-necked flask, add anhydrous magnesium sulfate to dry, and finally distill under reduced pressure at 65°C to obtain Mercapto castor oil. Wherein, the molar ratio of castor oil and 3-mercaptopropionic acid is 1:6, the consumption of catalyst p-toluenesulfonic acid is 5% of castor oil quality, and the cyclohexane consumption is 1g castor oil needs cyclohexane to be 5ml.

[0033] (2) Mix castor oil, mercapto castor oil and photoinitiator 184 uniformly under the condition of completely avoiding light, and the obtained prepolymer solution is the required mercapto-containing castor oil-based dee...

Embodiment 3

[0036] (1) Add castor oil, p-toluenesulfonic acid and cyclohexane in sequence in the reactor, then install the water separator, stir evenly, heat up to 110°C, add 2-mercaptobutyric acid, react for 9 hours, and dissolve the reaction solution Pour into a separatory funnel, add water to wash to remove excess 2-mercaptobutyric acid, add cyclohexane to static layer, take the upper layer in a three-necked flask, add anhydrous magnesium sulfate to dry, and finally distill under reduced pressure at 60°C to obtain Mercapto castor oil. Wherein, the molar ratio of castor oil and 2-mercaptobutyric acid is 1:7, the consumption of catalyst p-toluenesulfonic acid is 3% of castor oil quality, and the cyclohexane consumption is 1g castor oil needs cyclohexane to be 6ml.

[0037] (2) Mix castor oil, mercapto castor oil and photoinitiator 907 uniformly under the condition of completely avoiding light, and the obtained prepolymer solution is the desired mercapto-containing castor oil-based deep-l...

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Abstract

The invention belongs to the technical field of bio-based UV curing materials, in particular to a sulfhydryl castor oil-based deep photocuring material and a preparation method and application thereof. The raw material components of the sulfhydryl castor oil-based deep photocuring material comprise castor oil, sulfhydryl castor oil and a photoinitiator. The preparation method has simple steps: thecastor oil, the sulfhydryl castor oil and the photoinitiator are uniformly mixed under the condition of completely avoiding light, and an obtained prepolymer solution can be stored away from light. According to the invention, sulfhydryl is introduced into a biomass UV curing material system to construct a sulfhydryl-alkene photopolymerization material system which replaces a traditional acrylic ester pure alkene photopolymerization material system; double bonds of the prepared UV curing material are all from the castor oil, completely no acrylate double bond is contained, and meanwhile, due to the unique step-by-step polymerization mechanism, the sulfhydryl-alkene photopolymerization system effectively delays gel points, overcomes the phenomenon of oxygen polymerization inhibition, reduces volume shrinkage, improves double bond conversion rate, and simultaneously makes the polymerization network more uniform.

Description

technical field [0001] The invention belongs to the technical field of bio-based UV curing materials, in particular to a mercapto-containing castor oil-based deep-layer photo-curing material and its preparation method and application. Background technique [0002] Traditional UV-curable polymers mainly rely on the double bonds in acrylate monomers from petrochemical resources to polymerize under the action of free radical photoinitiators to form high polymers. Because of their excellent performance, energy saving and environmental protection, they have been widely used in Coatings, inks, adhesives and 3D printing and other fields. The raw materials of traditional UV curing materials are mainly composed of UV curing prepolymers, reactive diluents and photoinitiators. At present, UV-curable prepolymers are mainly petrochemical-based prepolymers, and there are still many defects in their application, which limit their application scope to a certain extent. For example, the ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F216/02C08F218/02C08F222/24C08F222/20C08F2/48
Inventor 袁腾李仁普梁斌杨卓鸿冯业昌
Owner SOUTH CHINA AGRI UNIV
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