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Emulsifier and preparation method thereof, and water-based epoxy hardener emulsion

A water-based epoxy and emulsifier technology, applied in the field of chemical organic synthetic materials and chemical technology, can solve the problems of difficult emulsification of curing agent, affect curing uniformity, short construction period, etc., achieve complete curing, promote curing uniformity, The effect of low VOC content

Inactive Publication Date: 2015-06-10
HUNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Emulsifier and preparation method thereof, and water-based epoxy hardener emulsion
  • Emulsifier and preparation method thereof, and water-based epoxy hardener emulsion
  • Emulsifier and preparation method thereof, and water-based epoxy hardener emulsion

Examples

Experimental program
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Effect test

Embodiment 1

[0049] 1. Preparation of emulsifier:

[0050] 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.

[0051] The molecular formula of the emulsifier is: where R is

[0052] 2. Preparation of water-based epoxy curing agent emulsion:

[0053] Add the mixture of 3.5g diethylenetriamine and 4.5g m-xylylenediamine in the reactor equipped with stirrer, condenser and thermometer. 2.4g ethylene glycol monobutyl ether and 1.2g n-butanol are dissolved epoxy resin 14.5g E-44, with Add the dissolved epoxy resin E-44 into the polyamine mixture, stir and heat up to 65°C, and keep it...

Embodiment 2

[0060] 1. Preparation of emulsifier:

[0061] 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.

[0062] The molecular formula of the emulsifier is: where R is

[0063] 2. Preparation of water-based epoxy curing agent emulsion:

[0064] Add the mixture of 3.5g diethylenetriamine and 4.5g m-xylylenediamine in the reactor equipped with stirrer, condenser and thermometer. 2.1g ethylene glycol monobutyl ether and 1.1g n-butanol are dissolved epoxy resin 12.6g E-51, with Add the dissolved epoxy resin to the polyamine mixture, stir and heat up to...

Embodiment 3

[0067] 1. Preparation of emulsifier:

[0068] 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.

[0069] The molecular formula of the emulsifier is: where R is

[0070] 2. Preparation of water-based epoxy curing agent emulsion:

[0071] Add the mixture of 5.0g triethylenetetramine and 4.5g m-xylylenediamine in the reaction kettle equipped with stirrer, condenser and thermometer. 2.4g ethylene glycol monobutyl ether and 1.2g n-butanol were dissolved in 14.5g epoxy epoxy resin E-44 to Add the dissolved epoxy resin to the polyamin...

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Abstract

The invention belongs to the technical fields of chemical organic synthetic materials and chemical processes, and relates to an emulsifier and a preparation method thereof, and a water-based epoxy hardener emulsion. The emulsifier is formed by reacting epoxy resin with polyethylene glycol and octadecylamine, and is good in compatibility. According to the emulsifier and the preparation method thereof, and the water-based epoxy hardener emulsion disclosed by the invention, polyamine is modified into an epoxy resin-philic epoxy-polyamine mixture, and then the epoxy-polyamine mixture is prepared into a hardener emulsion by a phase inversion method; as an epoxy resin chain segment is introduced, which is good in compatibility with the epoxy emulsion and thus capable of promoting even hardening, a hardened film is even and compact and the comprehensive mechanical properties of the hardened film are improved.

Description

technical field [0001] The invention belongs to the technical field of chemical organic synthetic materials and chemical technology, and relates to an emulsifier, a preparation method thereof, and a water-based epoxy curing agent emulsion prepared therefrom. 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 curin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/62C08G59/50C08G65/48C08G59/14C08J3/03C08L63/00
Inventor 李素芳李桃凡田承宇黄娟萍刘婷婷何德强王聪聪
Owner HUNAN UNIV
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