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Preparation method of aldehyde-free water-based cardanol ketone amine epoxy hardener

A cardanol ketamine epoxy and curing agent technology, applied in the direction of epoxy resin coatings, coatings, etc., can solve the problems that are not conducive to the environment and increase the pressure of three wastes treatment

Active Publication Date: 2021-07-06
上海经天新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of formaldehyde and lye as raw materials to produce cardanol curing agent not only increases the pressure on the treatment of three wastes, but is also not conducive to the environment.

Method used

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  • Preparation method of aldehyde-free water-based cardanol ketone amine epoxy hardener
  • Preparation method of aldehyde-free water-based cardanol ketone amine epoxy hardener
  • Preparation method of aldehyde-free water-based cardanol ketone amine epoxy hardener

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of preparation method of aldehyde-free water-based cardanol ketamine epoxy curing agent comprises the steps:

[0036] 200g of cardanol was placed in a four-necked flask equipped with a thermometer, a stirrer, a reflux condenser and a dropping funnel, and the four-necked flask was filled with nitrogen, started to stir and was warmed up to 42°C, and 151.2g of tetraethylenepentamine was added, Control the temperature below 75°C, and within 70 minutes, use the dropping funnel to add 86.6g of methyl isobutyl ketone dropwise, keep the temperature at 75°C and keep it warm for 50 minutes, then raise the temperature to reflux temperature of 90°C, keep it for 1.5h, and put the above The reactants were placed in a distillation device, rectified at 100° C. to remove moisture, and then distilled under reduced pressure for 10 minutes to obtain an intermediate product of aqueous cardanol ketone amine epoxy curing agent with an AHEW (amine hydrogen equivalent) of 89.

[0037] 20...

Embodiment 2

[0041] A kind of preparation method of aldehyde-free water-based cardanol ketamine epoxy curing agent comprises the steps:

[0042] 133g of cardanol and 20.8g of phenol were placed in a four-necked flask equipped with a thermometer, a stirrer, a reflux condenser and a dropping funnel. Ethylenepentamine, control the temperature below 70°C, and within 70min, use the dropping funnel to add 86.6g of methyl isobutyl ketone dropwise, keep the temperature at 70°C and keep it warm for 50min, then raise the temperature to the reflux temperature of 90°C, keep 1.5 h, put the above-mentioned reactants in a distillation device, rectify at 100°C to remove moisture, and then carry out vacuum distillation for 10 minutes to obtain an intermediate product of aqueous cardanol ketone amine epoxy curing agent, whose AHEW (amine hydrogen equivalent) is 79.5 .

[0043]20g molecular weight is 5000 polyethylene glycol, 80g molecular weight is 10000 polypropylene glycol block graft polyether and 20g e...

Embodiment 3

[0047] A preparation method of aldehyde-free water-based cardanol ketamine epoxy curing agent, comprising the steps of:

[0048] 200g cardanol is placed in the four-necked flask equipped with thermometer, stirrer, reflux condenser and dropping funnel, this four-necked flask is filled with nitrogen, starts stirring and is warming up to 42 ℃, adds 100.8g tetraethylenepentamine and 30.9g of pentaethylenehexamine, control the temperature below 80°C, and within 70min, use the dropping funnel to add 86.6g of methyl isobutyl ketone dropwise, keep the temperature at 80°C and keep it warm for 50min, then raise the temperature to the reflux temperature of 90°C , kept for 1.5h, the above-mentioned reactant was placed in a distillation device, rectified at 100°C to remove moisture, and then subjected to vacuum distillation for 10min to obtain an intermediate product of aqueous cardanol ketoneamine epoxy curing agent, its AHEW (amine hydrogen equivalent ) is 103.

[0049] 20g molecular we...

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Abstract

The invention relates to the technical field of epoxy hardeners, and particularly discloses a preparation method of an aldehyde-free water-based cardanol ketone amine epoxy hardener. The preparation method comprises the following steps: mixing cardanol or a mixture of cardanol and other phenols with polybasic aliphatic amines or alicyclic amines, and then reacting with ketones to obtain a water-based cardanol ketone amine epoxy hardener intermediate product; mixing epoxy resin and block polyether polyol, heating and melting, and adding a catalyst at 50-100 DEG C for condensation reaction to obtain an emulsifier with an epoxy functional group and a hydroxyl functional group after the reaction is completed; and adding the obtained emulsifier into the water-based cardanol ketone amine epoxy hardener intermediate product, heating to 60-80 DEG C, and reacting to obtain the aldehyde-free water-based cardanol ketone amine epoxy hardener after the reaction is completed. The prepared epoxy hardener is low in VOC content and has excellent corrosion resistance, toughness and stability.

Description

technical field [0001] The application relates to the technical field of epoxy curing agents, more specifically, it relates to a preparation method of an aldehyde-free water-based cardanol ketamine epoxy curing agent. Background technique [0002] Two-component water-based epoxy coating is one of the most important and widely used main varieties in water-based industrial paint. It has excellent properties in terms of corrosion resistance, water resistance, and resistance to various mechanical, physical and chemical attacks. [0003] The two-component water-based epoxy coating is mainly composed of epoxy resin and curing agent, and the curing agent plays a decisive and crucial role in the performance of its coating film. Excellent varieties of curing agent can make epoxy coatings in the above-mentioned To achieve the desired best results in various industrial fields. [0004] At present, phenalkamine curing agent is recognized as one of the amine curing agents with excellen...

Claims

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Application Information

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IPC IPC(8): C08G59/62C08G81/00C09D163/00
CPCC08G59/623C08G81/00C09D163/00
Inventor 刘听单金凤
Owner 上海经天新材料科技有限公司