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Expoxy resin polyamine curing agent and waterborne epoxy curing agent emulsion

A technology of epoxy resin and water-based epoxy resin, applied in the field of epoxy resin polyamine curing agent and water-based epoxy curing agent emulsion, can solve the problems of affecting curing uniformity, difficult to emulsify the curing agent, and short construction period. Good curing effect, improved compatibility, low VOC content

Active Publication Date: 2014-01-08
SINOHYDRO BUREAU 8 CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Epoxy resins are mostly dispersed in water in the form of emulsions. Traditional water-based epoxy curing agents have limited compatibility with epoxy emulsions, which will affect the uniformity of curing. short question

Method used

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  • Expoxy resin polyamine curing agent and waterborne epoxy curing agent emulsion
  • Expoxy resin polyamine curing agent and waterborne epoxy curing agent emulsion
  • Expoxy resin polyamine curing agent and waterborne epoxy curing agent emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Preparation of emulsifier:

[0047]Add 39g polyethylene glycol 6000 (PEG6000) and 3g epoxy resin E-44 into the reaction kettle, heat to 85°C under nitrogen atmosphere, stir to mix the two evenly, add 0.2g N,N-dimethyl Benzylamine catalyst, constant temperature reaction at 135°C. After 480 minutes of constant temperature reaction, the temperature was lowered to 90°C, 1.8 g of octadecylamine was added, and the reaction was carried out for 240 minutes to obtain a white waxy product emulsifier.

[0048] The molecular formula of the emulsifier is: in

[0049] R is

[0050] 2. Preparation of polyamine curing agent for epoxy resin:

[0051] Add the mixture of 3.5g diethylenetriamine and 4.5g m-xylylenediamine in the reactor equipped with stirrer, condenser and thermometer. Dissolve epoxy resin 14.5g E-44 with 2.4g ethylene glycol monobutyl ether and 1.2g n-butanol in 30dm 3 h -1 Add the dissolved epoxy resin to the polyamine mixture, stir and heat up to 65°C, and ...

Embodiment 2

[0061] 1. Preparation of emulsifier:

[0062] Add 26g polyethylene glycol 4000 and 2.6g epoxy resin E-51 to 250cm 3 In a reaction kettle, under a nitrogen atmosphere, heat to 85°C, stir to mix the two evenly, add 0.2g of N,N-dimethylbenzylamine as a catalyst, and carry out a constant temperature reaction at 135°C. After 480 minutes of constant temperature reaction, the temperature was lowered to 90°C, 1.8 g of octadecylamine was added, and the reaction was carried out for 240 minutes to obtain a white waxy product emulsifier.

[0063] The molecular formula of the emulsifier is: in

[0064] R is

[0065] 2. Preparation of polyamine curing agent for epoxy resin:

[0066] Add the mixture of 3.5g diethylenetriamine and 4.5g m-xylylenediamine in the reactor equipped with stirrer, condenser and thermometer. Dissolve epoxy resin 12.6g E-51 with 2.1g ethylene glycol monobutyl ether and 1.1g n-butanol at 30dm 3 h -1 Add the dissolved epoxy resin to the polyamine mixture, stir...

Embodiment 3

[0072] 1. Preparation of emulsifier:

[0073] Add 65g of polyethylene glycol 10000 and 3.0g of epoxy resin E-44 into the reaction kettle, then heat to 85°C under nitrogen atmosphere, stir to mix the two evenly, add 0.2g of N,N-dimethyl Benzylamine was used as a catalyst, and the constant temperature reaction was carried out at 135°C. After constant temperature reaction for 480 minutes, the temperature was lowered to 90°C, 1.8 g of octadecylamine was added, and the reaction was carried out for 240 minutes to obtain a white waxy emulsifier.

[0074] The molecular formula of the emulsifier is: in

[0075] R is

[0076] 2. Preparation of polyamine curing agent for epoxy resin:

[0077] Add the mixture of 5.0g triethylenetetramine and 4.5g m-xylylenediamine in the reaction kettle equipped with stirrer, condenser and thermometer. Dissolve 14.5g of epoxy resin E-44 in 2.4g of ethylene glycol monobutyl ether and 1.2g of n-butanol in 30dm 3 h -1 Add the dissolved epoxy resin ...

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Abstract

The invention belongs to the technical fields of chemical organic synthetic materials and chemical process, and relates to an expoxy resin polyamine curing agent and a waterborne epoxy curing agent emulsion. The expoxy resin polyamine curing agent with hydrophilic epoxy resin is obtained by modifying polyamine; the expoxy resin polyamine curing agent is prepared into the curing agent emulsion through a reverse inversion method, wherein. According to the invention, an expoxy resin chain segment is introduced to the curing agent emulsion, so that the curing agent emulsion has good compatibility with an expoxy emulsion, thus the solidification uniformity curing is promoted, a solidifying cured membrane is uniform and compact, and the comprehensive mechanical property of the solidifying cured membrane is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical organic synthetic materials and chemical technology, and relates to an epoxy resin polyamine curing agent and a water-based epoxy curing agent emulsion. Background technique [0002] Epoxy resins are widely used in the bonding of various metals and non-metals, coatings, electrical insulation materials, glass fiber reinforced plastics / composites, and casting potting materials. However, epoxy resin is a thermoplastic linear resin, which cannot undergo crosslinking reaction itself. Epoxy resins can be practically applied only after adding a curing agent to form a cured product with a three-dimensional network structure (body-shaped network structure). To make the epoxy resin and curing agent fully mixed and fully cured to form a dense and uniform cured film, it is the key to ensure good compatibility between the epoxy resin and curing agent. [0003] Epoxy-polyamine curing agent is currently the m...

Claims

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Application Information

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IPC IPC(8): C08G59/62C08G59/50C08G59/14C08J3/03C08L63/00C08G65/48
Inventor 李桃凡李素芳田承宇黄娟萍王聪聪何德强刘婷婷
Owner SINOHYDRO BUREAU 8 CO LTD
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