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Preparation of aqueous epoxy resin

A technology of water-based epoxy resin and epoxy resin, which is applied in the field of preparation of water-based epoxy resin, can solve the problems of large solvent ratio and increased VOC value, and achieve small dispersed particle size, increased hydrophilic-lipophilic balance value, and good Effect of self-emulsifying function

Active Publication Date: 2009-08-05
CHINA PETROCHEMICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The proportion of solvent is too large, which increases the VOC value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: the condensation reaction of bisphenol A type epoxy resin and polyether glycol.

[0024] In the 500ml four-neck flask equipped with stirring device, condensing device, thermometer and dry nitrogen system, drop into 15.3g epoxy equivalent and be the bisphenol A type epoxy resin of 188g / eq and 237.1g polyethylene glycol (molecular weight is 2000 ~6000). Pass through dry nitrogen for 10 minutes to drive away the air in the system, heat to dissolve, add boron trifluoride ether in 3 times within 30 minutes, raise the temperature to 100°C, and react for 3 hours to obtain 252.4g of white to slightly yellow solid substance, namely reactive emulsification agent.

Embodiment 2

[0025] Embodiment 2: the condensation reaction of bisphenol A type epoxy resin and polyether glycol.

[0026] In the 500ml four-neck flask equipped with stirring device, condensing device, thermometer and dry nitrogen system, drop into 60.2g epoxy equivalent and be the bisphenol A type epoxy resin of 640g / eq and 282.2g polyethylene glycol (molecular weight is 2000 ~6000). Pass dry nitrogen for 10 minutes to drive away the air in the system, heat to dissolve, add SnCl in 3 times within 30 minutes 4 , heated up to 100°C, and reacted for 3.5h to obtain 342.4g of white to slightly yellow solid substance, namely reactive emulsifier.

Embodiment 3

[0027] Example 3: In a 500ml four-necked flask equipped with a stirring device, a condensing device, a thermometer and a dry nitrogen system, 230g of bisphenol A epoxy resin with an epoxy equivalent of 188g / eq was added, the temperature was raised to 150°C, and 32.5 g The reactive emulsifier obtained in Example 2 was reacted at 140-150° C. for 2 hours, 8 g of benzyl alcohol and 6 g of ethylene glycol butyl ether were added, mixed evenly, and emulsified with water in a 2 L emulsification kettle to obtain a water-based epoxy resin. Its solid content is 49.3%.

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PUM

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Abstract

The invention provides a preparation method of water-dilutable epoxide resin, comprising two steps as follows: epoxide resin and polyether dihydric alcohol react under the action of Lewis acid catalyst to prepare a reactivity emulsifier which is a polymerized substance with terminal groups of an epoxy group and a hydroxyl group; and then different epoxide resins react with the reactivity emulsifier prepared in the first step to obtain the water-dilutable epoxide resin. The water-dilutable epoxide resin can be applied to the fields of dope, cement enhancement, terrace, and the like through mixing with matched a firming agent and taking water as a diluting agent.

Description

technical field [0001] The invention relates to a preparation method of waterborne epoxy resin. Background technique [0002] Epoxy resin has excellent chemical stability, corrosion resistance, good bonding performance and high mechanical strength, so it is widely used in industry. In many fields of epoxy resin application, especially in the field of coatings, although epoxy resin has many excellent properties, its traditional application part must add organic solvents, so it is challenged by environmental pollution and construction safety. Especially with the development of world economy and science and technology, and the strengthening of the awareness of global environmental protection, governments of various countries pay more and more attention to the pollution of volatile organic compounds (VOC) and HAP in coatings to the environment. More and more people pay attention to the application and development of environmental protection epoxy resin. On July 1, 2004, my cou...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08J3/03C08G59/14
Inventor 唐光斌徐伟箭肖华夏新年李婧婧李霞
Owner CHINA PETROCHEMICAL CORP
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