A kind of preparation method of natural macromolecule-based photocurable resin

A natural polymer and curing resin technology, applied in the field of light-curing materials, can solve problems such as defects, and achieve the effects of improving comprehensive performance, improving strength and adhesion performance, and improving crack resistance

Active Publication Date: 2016-01-20
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nano-natural polymer materials such as nano-cellulose, chitin nano-crystals, nano-scale starch micro-crystals and konjac glucomannan are almost composed of units similar to glucose structures, each structural unit has a large number of hydroxyl groups and amino groups , this unique structure allows it to react with the half-capped prepolymer containing -NCO groups, thereby introducing it into the photocurable resin. The introduction of this material can improve some properties of the photocurable resin: such as hardness , Scratch resistance, wear resistance, adhesion, thermal stability, etc. However, the research based on nanometer natural polymer materials and resin modified synthetic photocuring is very lacking.

Method used

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  • A kind of preparation method of natural macromolecule-based photocurable resin
  • A kind of preparation method of natural macromolecule-based photocurable resin

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A preparation method of natural macromolecular-based photocurable resin, comprising the following steps:

[0035] 1) With butyl acetate as the reaction solvent and dibutyltin dilaurate as the catalyst, fully react isophorone diisocyanate (IPDI) and polyethylene glycol (PEG400), and then add hydroquinone (blocking polymerizer) and hydroxyethyl methacrylate (HEMA) to fully react to obtain a semi-blocked polyurethane prepolymer, the specific operation is as follows:

[0036] Add 0.2mol of isophorone diisocyanate (IPDI) and 15ml of butyl acetate into a 250ml four-necked flask equipped with a stirrer, a thermometer and a condensing reflux tube, add 0.1mol dropwise with a dropping funnel while stirring at room temperature and remove by molecular sieve Polyethylene glycol (PEG400) in water and 0.4229g dibutyltin dilaurate (accounting for 0.5% of the total mass of isophorone diisocyanate and PEG400), react at 80°C for 3h after the dropwise addition; 0.013g of hydroquinone (acc...

Embodiment 2

[0042] A preparation method of natural macromolecular-based photocurable resin, comprising the following steps:

[0043]1) Using ethyl acetate as the reaction solvent and stannous octoate as the catalyst, fully react dimethylene phenyl diisocyanate and polytetrahydrofuran diol 1400, and then add p-methoxyphenol (polymerization inhibitor) and formaldehyde Hydroxypropyl acrylate is fully reacted to obtain a semi-blocked polyurethane prepolymer, and the specific operations are as follows:

[0044] Add 0.2 mol of dimethylene phenyl diisocyanate and 15 ml of ethyl acetate into a 500 ml four-necked flask equipped with a stirrer, a thermometer and a condensing reflux tube, and add 0.1 mol of diisocyanate through a molecular sieve to remove water with a dropping funnel while stirring at room temperature. mol polytetrahydrofuran diol 1400 and 1.2432g stannous octoate (accounting for 0.7% of the total mass of dimethylene phenyl diisocyanate and polytetrahydrofuran diol), react at 40°C f...

Embodiment 3

[0053] A preparation method of natural macromolecular-based photocurable resin, comprising the following steps:

[0054] 1) With propyl acetate as the reaction solvent and dibutyltin dilaurate as the catalyst, fully react isophorone diisocyanate (IPDI) and polyethylene glycol (PEG600), and then add hydroquinone (blocking Polymerizing agent) and hydroxyethyl acrylate are fully reacted to obtain a semi-blocked polyurethane prepolymer, and the specific operations are as follows:

[0055] Add 0.2mol of isophorone diisocyanate (IPDI) and 15ml of propyl acetate into a 250ml four-necked flask equipped with a stirrer, a thermometer and a condensing reflux tube. Polyethylene glycol (PEG600) 0.1mol and 0.6275g dibutyltin dilaurate (accounting for 0.6% of the total mass of isophorone diisocyanate and PEG400.), react at 40°C after the dropwise addition; 0.0413g of hydroquinone (accounting for 0.15% of the mass of hydroxyethyl acrylate) and 0.17mol of hydroxyethyl acrylate (HEMA) were add...

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Abstract

The invention discloses a method for preparing a natural polymer matrix light-cured resin. The method comprises the following steps: (1) leading polyisocyanate, oligomer polyol and hydroxyl-containing acrylate to react according to a certain molar ratio to prepare a semi-end-blocked prepolymer; (2) dispersing a natural polymer nano-material in a solvent, and adding the semi-end-blocked prepolymer prepared in the step 1 to obtain a full-end-blocked prepolymer; (3) mixing the full-end-blocked prepolymer and a photo-initiator to prepare the natural polymer matrix resin with excellent performance under ultraviolet radiation. The method adopts the natural polymer material as a raw material, and has the advantages that: the prepared light-cured resin has high molecular weight and viscosity, the interaction and coagulation strength among resin molecules can be enhanced, the photo-crosslinking reaction efficiency can be improved, the strength and attachment performance of a curing film can be improved, the cost is low, the process is simple and controllable, and the product is more environment-friendly.

Description

technical field [0001] The invention belongs to the field of photocurable materials, and relates to a preparation method of photocurable resin, in particular to a preparation method of natural polymer-based photocurable resin. Background technique [0002] As a new and advanced material surface treatment technology, photocuring technology has achieved rapid development since its industrialization in the 1960s, especially its high efficiency, high quality, environmental protection, energy saving and other characteristics, making the application of photocuring products increasingly widely. At present, almost all photocurable resins are derived from chemical reagents related to petroleum resources. In order to improve the mechanical properties of the photocured coating surface, such as surface hardness, wear resistance, scratch resistance, etc., some researchers introduced some inorganic substances into it, such as talcum powder, glass microspheres, and silicon dioxide. Howev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F299/06C08F2/48C08G18/67C08G18/48C08G18/64C08G18/12C08G18/83
Inventor 刘石林李唯吴悦寒梁伟伟李斌
Owner HUAZHONG AGRI UNIV
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