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Polyfunctionality hybrid cured resin and preparation method thereof

A hybrid curing and multi-functionality technology, applied in coatings, polyurea/polyurethane coatings, etc., to achieve the effects of reducing usage, enhancing adhesive performance, and reducing volume shrinkage

Active Publication Date: 2019-07-16
SHENZHEN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the two curing groups (acrylate double bond and epoxy group) exist in the same resin molecular structure, it can solve the problems caused by the compounding of two different resins in the existing hybrid curing system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The first step, in 500mL there-necked flask, add 30g solvent propylene glycol methyl ether acetate, 30g methyl methacrylate, 30g methyl acrylate, 30g glycidyl methacrylate, 80g hydroxyethyl methacrylate, 30g styrene, Stir evenly, add catalyst azobisisobutyronitrile accounting for 0.8% of the total mass of the monomer, heat to 68°C while stirring, and react for 3 hours to obtain a polyacrylate segment with hydroxyl and epoxy groups in the side chain ①, In the polyacrylate segment, the mass percentage of hydroxyethyl methacrylate (the source of the hydroxyl group) is 40%, and the mass percentage of the glycidyl methacrylate (the source of the epoxy group) is 15%.

[0039] In the second step, add 1mol of toluene diisocyanate (TDI) to a 1000mL three-necked flask, heat it to 63°C, and add 0.5% of dibutyltin dilaurate to 0.5mol of polyethylene glycol (molecular weight: 600) , dropwise into toluene diisocyanate (TDI) solution, continue to react for 2.5h after dropping, add 0.3...

Embodiment 2

[0043] In the first step, add 30g solvent ethylene glycol butyl ether acetate, 40g butyl acrylate, 60g methyl methacrylate, 40g glycidyl methacrylate, 40g hydroxyethyl acrylate, 20g acrylonitrile in a 500mL three-necked flask, Stir evenly, add 1.0% of the catalyst benzoyl peroxide tert-butyl peroxide, and heat to 65°C while stirring, and react for 3 hours to obtain a polyacrylate chain with hydroxyl and epoxy groups in the side chain Section ①; in the polyacrylate segment, the mass percentage of hydroxyethyl acrylate (the source of the hydroxyl group) is 20%, and the mass percentage of the glycidyl methacrylate (the source of the epoxy group) is 20%.

[0044] In the second step, add 1mol of isophorone diisocyanate (IPDI) to a 1000mL three-necked flask, heat to 70°C, and add 0.4% of dibutyltin dilaurate to 0.5mol of polyethylene glycol ( Molecular weight 1000), add dropwise to isophorone diisocyanate (IPDI) solution, continue to react for 2 hours after dropping, add 0.6% p-hydr...

Embodiment 3

[0048] The first step, add 30g solvent propylene glycol diacetate, 30g butyl methacrylate, 40g methyl acrylate, 50g glycidyl acrylate, 20g hydroxyethyl acrylate, 10g hydroxypropyl methacrylate, 30g Styrene, 20g of acrylamide, stir evenly, add 0.6% catalyst benzoyl peroxide, which accounts for 0.6% of the total mass of the monomer, heat to 73°C while stirring, and react for 2.5h to obtain a compound with hydroxyl and epoxy groups in the side chain Polyacrylate segment ①; in the polyacrylate segment, the mass percentage content of hydroxy acrylate (source of hydroxyl group) is 15%, and the mass percentage content of glycidyl acrylate (source of epoxy group) is 25%.

[0049] In the second step, add 1mol of phenylmethane diisocyanate (MDI) to a 1000mL three-necked flask, heat it to 68°C, add 0.6% of dibutyltin dilaurate to 0.5mol of 1,6-hexanedi Alcohol, dropwise into the phenylmethane diisocyanate (MDI) solution, continue to react for 2 h after dropping, add 0.8% p-hydroxyanisole...

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Abstract

The invention provides polyfunctionality hybrid cured resin and a preparation method thereof. The molecular chain of the polyfunctionality hybrid cured resin is of a comb-type structure, and includesa polyacrylate main chain and urethane acrylate side chains, wherein a plurality of acrylate double bonds and epoxy groups are contained in the side chains of the polyfunctionality hybrid cured resinseparately. The resin of the technical scheme has low viscosity and multiple functionality, the use amount of a diluent can be reduced in subsequent use, and the polyacrylate main chain and the urethane acrylate side chains are contained in the structure of the resin; and since a plurality of acrylate double bonds and epoxy groups are contained in the side chains, ultraviolet light-radical-heat hybrid curing or ultraviolet light-radical-cation hybrid curing can be achieved, and the degree of cross-linking of the resin obtained after hybrid curing is performed is improved greatly, so that thehardness, adhesion, wear resistance, solvent resistance, salt spray resistance and other properties of a cured film are improved effectively.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a multi-functionality hybrid cured resin and a preparation method thereof. Background technique [0002] Ultraviolet (UV) curing technology is a green and environmentally friendly curing technology. It has the advantages of fast curing speed, less environmental pollution, automatic production, and is suitable for use on heat-sensitive substrates. It is expected to replace traditional solvent-based coatings, adhesives, inks, etc. in industry, and has good application prospects in most fields. According to the photocuring mechanism, there are two types of free radical curing and cationic curing. Free radical curing is the generation of free radicals under photoinitiation, which initiates the polymerization reaction of unsaturated double bonds on prepolymers and monomers; cationic curing is the protonic acid or Lewis acid produced by cationic initiators after ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C08G18/62C08G18/67C08G18/48C08G18/32C08F220/20C08F220/14C08F220/32C08F212/08C08F220/44C08F220/18C08F220/56C09D187/00C09D175/14
CPCC08F220/14C08F220/20C08F220/32C08G18/3206C08G18/4833C08G18/6229C08G18/6237C08G18/672C08G81/024C09D175/14C09D187/005C08F220/325C08G18/48C08F212/08C08F220/1804C08F220/44C08F220/56
Inventor 刘红波张霞张武英林峰
Owner SHENZHEN POLYTECHNIC
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