Special emulsifier for water-based solid epoxy resin emulsion and preparation method of emulsion

A solid epoxy resin and epoxy resin technology, applied in the field of polymers, can solve the problems of high epoxy value, high cross-linking density of paint film, affecting performance and other problems, and achieve short processing time, simple process and easy realization Effect

Active Publication Date: 2016-12-07
安徽艾珀希德化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the water-based epoxy resin emulsions currently used in the society are prepared from liquid epoxy. Due to the small molecular weight of liquid epoxy resin and high epoxy value, the final cured paint film has a high cross-linking density. High brittleness and poor corrosion resistance seriously affect its performance, making water-based epoxy coatings unable to be widely used

Method used

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  • Special emulsifier for water-based solid epoxy resin emulsion and preparation method of emulsion
  • Special emulsifier for water-based solid epoxy resin emulsion and preparation method of emulsion
  • Special emulsifier for water-based solid epoxy resin emulsion and preparation method of emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Synthesis of special emulsifier for waterborne solid epoxy resin emulsion

[0029] Put a 2L four-necked flask equipped with a stirrer, a condenser, and a thermometer into a water bath, add 300g of liquid epoxy resin E-35 to the four-necked flask, raise the temperature to 50°C, and then add 300g of polyetheramine D-400 , and stirred for 10 minutes to mix the two evenly.

[0030] Add 3g of aluminum trichloride catalyst to the above mixing system, keep the stirring rate of 300r / min, and react at 60°C for 0.5h.

[0031] Raise the temperature to 80°C, slowly add 300g of polyetheramine D-400 dropwise with a pipette, keep the stirring rate of 300r / min, and react at 80°C for 1 hour to obtain -A-B-A-B-A-B-embedded water-based solid epoxy resin emulsion segmented emulsifier.

[0032] 2. Preparation of aqueous nanoscale solid epoxy resin emulsion

[0033] Add 200g of solid epoxy resin E-20 into a 1L beaker, heat it to 80°C with a heating mantle, add 20g of the appealing wate...

Embodiment 2

[0038] 1. Synthesis of special emulsifier for waterborne solid epoxy resin emulsion

[0039] Put a 5L four-necked flask equipped with a stirrer, a condenser, and a thermometer into a water bath, add 100g of liquid epoxy resin E-44 to the four-necked flask, raise the temperature to 40°C, then add 1000g of polypropylene glycol 4000, and stir for 20 minutes , to mix the two evenly.

[0040] Add 30g of alkyl zinc catalyst to the above mixed system, keep the stirring rate of 300r / min, and react at 60°C for 2h

[0041] Raise the temperature to 90°C, slowly add 1000g of polypropylene glycol 4000 dropwise with a pipette, maintain a stirring rate of 300r / min, and react at 90°C for 2 hours to obtain -A-B-A-B-A-B-block emulsification for water-based solid epoxy resin emulsion agent.

[0042] 2. Preparation of aqueous nanoscale solid epoxy resin emulsion

[0043] Add 200g of solid epoxy resin E-20 into a 1L beaker, heat it to 90°C with a heating mantle, add 30g of the appealing water-b...

Embodiment 3

[0048] 1. Synthesis of special emulsifier for waterborne solid epoxy resin emulsion

[0049] Put a 2L four-necked flask equipped with a stirrer, a condenser, and a thermometer into a water bath. First add 200g of liquid epoxy resin E-31 to the four-necked flask and heat it up to 60°C, then add 500g of polyetheramine D-2000. Stir for 30min to make it evenly mixed.

[0050] Add 10g of alkylaluminum catalyst to the above mixed system, keep the stirring rate of 300r / min, and react at 50°C for 1h.

[0051] Raise the temperature to 90°C, slowly add 500g of polyethylene glycol 2000 dropwise with a pipette, keep the stirring rate of 300r / min, and react at 90°C for 1 hour to obtain the water-based solid epoxy resin emulsion-A-B-C-B-A-B-C-B-block type emulsifier.

[0052] 2. Preparation of aqueous nanoscale solid epoxy resin emulsion

[0053] Add 200g of solid epoxy resin E-20 into a 1L beaker, heat it to 85°C with a heating mantle, add 12g of the appealing water-based solid epoxy re...

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Abstract

The invention provides a special emulsifying agent of an aqueous solid epoxy resin emulsion and a preparation method of the emulsion. Solid epoxy resin is used as an emulsion base body, polyether amine and polyether alcohol are used as hydrophilic chain segments and liquid epoxy resin is used as an oleophylic chain segment to prepare the special blocked emulsifying agent of the aqueous solid epoxy resin emulsion. A high-speed dispersion machine and processing manners including a nano emulsifying machine and the like are combined to obtain a stable high-solid-content nano-grade solid epoxy resin emulsion within a short processing time. The nano-grade solid epoxy resin emulsion prepared according to the scheme has the characteristics of short emulsifying time, low energy consumption, high solid content (40%-60%), small grain diameter, low dispersion degree (200nm-500nm), moderate viscosity (300mPa*s-800mPa*s), excellent stability and the like. The problem that solid epoxy resin is difficult to emulsify is solved and the problem of coating fragility of an emulsion prepared by taking liquid epoxy resin as a base body is overcome.

Description

technical field [0001] The invention belongs to the technical field of macromolecules, and in particular relates to the preparation of a special emulsifier for solid epoxy resin and the preparation method of nanoscale solid epoxy resin emulsion. Background technique [0002] With the progress of social civilization, people have higher requirements for coating technology and products. Since the 1970s, in order to protect the environment and reduce pollution, people have invented high-performance and low-pollution coatings such as water-based coatings, powder coatings, and high-solid coatings. Water-based coatings use water as a solvent to disperse synthetic resins in it. Water-based coatings are environmentally friendly, non-toxic, harmless, odorless, resource-saving, low-cost, and have a wide range of sources, which can also reduce safety hazards during transportation. However, compared with solvent-based coatings, water-based coatings also have certain disadvantages. In o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/00C08J3/05C08L63/00
Inventor 刘晓非李俊霖吴晓乐李景龙李苑
Owner 安徽艾珀希德化工科技有限公司
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