Preparation method of polyurethane epoxy resin acrylate ternary polymerization resin nano aqueous dispersion

A technology of acrylate ternary copolymerization resin and epoxy resin, which is applied in the chemical industry, can solve the problems of no chemical connection, complex process, and low degree, and achieve good compatibility between components, rich functional groups, and high conversion rate. Effect

Inactive Publication Date: 2014-12-17
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Among the above three methods, the first method has more steps, complex process, unstable product, and the three components are not chemically connected, the compatibility is poor, and the overall performance of the obtained coating is poor; the second method, although there are certain chemical connection, but the degree is not high, and the obtained emulsion has large particle size, wide particle size distribution, and poor storage stability; in the emulsion prepared by the third method, polyurethane, epoxy resin and acrylate are connected by chemical bonds, which can reach The mixing at the molecular level is achieved, but due to solvent interference, the functionality is not easy to precisely control, resulting in high gel content in the product, low yield, and large performance fluctuations

Method used

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  • Preparation method of polyurethane epoxy resin acrylate ternary polymerization resin nano aqueous dispersion
  • Preparation method of polyurethane epoxy resin acrylate ternary polymerization resin nano aqueous dispersion
  • Preparation method of polyurethane epoxy resin acrylate ternary polymerization resin nano aqueous dispersion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 90 g of polyester diol (polybutylene adipate diol, PBA) with a molecular weight of 2000 into a reaction kettle equipped with a stirrer and a reflux condenser, vacuum dehydration for 1 hour, and then add dimethylol Propionic acid 3g, replace nitrogen for 10 minutes, heat up to 75°C, add toluene diisocyanate 12g, catalyst dibutyltin dilaurate 0.1g, react for 3 hours, then cool down to 65°C, add 1.2g hydroxyethyl acrylate to react for 1 hour , to prepare polyurethane macromonomer.

[0042] Add n-butanol 100g, propylene glycol butyl ether 100g and epoxy resin E4466g in the flask again, replace nitrogen for 10 minutes, heat up while stirring, make material temperature reach 100 ℃. At the same time, mix and dissolve 30g of methacrylic acid, 30g of hydroxyethyl methacrylate, 50g of ethyl acrylate, 20g of butyl acrylate and 7g of benzoyl peroxide, and gradually drop them into the reaction kettle as a mixed dropping solution, and drop The time is 3.5 hours, and then keep wa...

Embodiment 2

[0044] Add 90 g of polyether diol (polyoxypropylene diol, N220) with a molecular weight of 2000 into a reaction kettle equipped with a stirrer and a reflux condenser, vacuum dehydration for 1 hour, then add 3 g of dimethylol propionic acid to replace Nitrogen for 10 minutes, heat up to 80°C, add 15.3g of isophorone diisocyanate, 0.1g of catalyst dibutyltin dilaurate, react for 3 hours, then cool down to 65°C, add 1.2g of hydroxyethyl acrylate to react for 1 hour, A polyurethane macromonomer is prepared.

[0045] Add n-butanol 100g, propylene glycol butyl ether 100g and epoxy resin E12 62g in the flask again, replace nitrogen for 10 minutes, heat up while stirring, make material temperature reach 115 ℃. At the same time, mix and dissolve 35g of methacrylic acid, 45g of hydroxyethyl methacrylate, 20g of ethyl acrylate, 30g of butyl acrylate and 10g of benzoyl peroxide, and gradually drop them into the reaction kettle as a mixed dropping solution, and dropwise add The time is 3.5 ...

Embodiment 3

[0047] Add 100 g of polyether diol (polyoxypropylene diol, N210) with a molecular weight of 1000 into a reaction kettle equipped with a stirrer and a reflux condenser, vacuum dehydration for 1 hour, then add 4 g of dimethylol propionic acid to replace Nitrogen for 10 minutes, heat up to 75°C, add 40g of isophorone diisocyanate, 0.15g of dibutyltin dilaurate as a catalyst, react for 3 hours, then cool down to 65°C and add 6g of hydroxypropyl acrylate to react for 1 hour to prepare Polyurethane macromonomer.

[0048] Add n-butanol 100g, propylene glycol butyl ether 100g and epoxy resin E44 30g in the flask again, replace nitrogen for 10 minutes, heat up while stirring, make the material temperature reach 115 ℃. Simultaneously, 15g of acrylic acid, 25g of hydroxyethyl acrylate, 40g of methyl methacrylate, 40g of butyl acrylate and 10g of benzoyl peroxide are mixed and dissolved, and as a mixed dripping solution, they are gradually dropped into the reactor, and the dropping time i...

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Abstract

The invention discloses a preparation method of a polyurethane epoxy resin acrylate ternary polymerization resin nano aqueous dispersion. The method is characterized by comprising, firstly, preparing macromolecular polyurethane monomers; secondly, adding epoxy resin and solvent into the macromolecular polyurethane monomers, mixing and heating the mixture to 90-120 DEG C, adding the mixture of acrylic acid monomers, acrylate monomers and peroxide radical initiators into the mixture above drop by drop for 2-5 hours, and then performing heat preservation to continue reaction for 1-5 hours to obtain polyurethane epoxy resin acrylate ternary polymerization resin; adding neutralizer into the polyurethane epoxy resin acrylate ternary polymerization resin for at a temperature of 40-60 DEG C for neutral reaction for 0.5-1 hour, adding water for dispersion and then performing discharging. According to the method, the components of the copolymers of the polyurethane epoxy resin acrylate ternary polymerization resin nano aqueous dispersion are connected through chemical bonds and accordingly are good in compatibility, rich in function groups, small in grain diameter and good in permeability. Therefore, the preparation method of the polyurethane epoxy resin acrylate ternary polymerization resin nano aqueous dispersion can be applied to the fields such as industrial coating, floor coating, wood coating and leather finishing.

Description

technical field [0001] The invention relates to a new method for grafting and copolymerizing polyurethane macromolecular monomers, epoxy resins and acrylate monomers to prepare polyurethane epoxy resin acrylate terpolymer resin nanometer aqueous dispersion, and belongs to the technical field of chemical industry. Background technique [0002] Waterborne polyurethane has been widely used in adhesives, coatings and other fields due to its excellent cold resistance, elasticity, abrasion resistance, high gloss, environmental protection and safety. However, the deficiencies of waterborne polyurethane coatings in terms of film formation, mechanical properties, water resistance and corrosion resistance also limit its application in more fields. Epoxy resin and polyacrylic resin have advantages in terms of mechanical properties, film-forming properties and corrosion resistance. The three have certain complementary effects in nature. If the three are combined, they will be able to ov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F291/12C08G18/83C08J3/03
Inventor 方华高丁运生杨善中徐佩魏海兵
Owner HEFEI UNIV OF TECH
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