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Diethylenetriamine amido low molecular weight 650 epoxy hardener used for epoxy polyamide coating and preparation method and application thereof

A diethylenetriamine-based, epoxy polyamide technology, applied in epoxy resin coatings, coatings and other directions, can solve problems such as increasing costs, and achieve the effects of high production efficiency, smooth and bright board surface, and strong controllability

Active Publication Date: 2014-11-19
江苏三木化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the prior art adopts the diethylenetriamine method to prepare low-molecular-weight polyamide epoxy curing agents, the improvement of the activity of polyamide epoxy curing agents must make the reactive amine excessive, thereby increasing the cost, and the improvement of miscibility in the preparation process is usually At the expense of activity, so how to balance cost, activity and miscibility, and maximize the use of diethylenetriamine, thereby reducing costs and maintaining high activity and high miscibility, is a key problem in the prior art

Method used

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  • Diethylenetriamine amido low molecular weight 650 epoxy hardener used for epoxy polyamide coating and preparation method and application thereof

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Experimental program
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Embodiment 1

[0025] 1. Diethylenetriamine-based low molecular weight 650 epoxy curing agent for epoxy polyamide paint, which is made of the following raw materials in parts by weight:

[0026] Diethylenetriamine 160g, dimer acid 280g, fatty acid 141g, bisphenol A epoxy resin 60g, phenol 20g, benzyl alcohol 20g, xylene 20g.

[0027] 2, the preparation method of diethylenetriamine-based low molecular weight 650 epoxy curing agent for epoxy polyamide coating, it comprises the following steps:

[0028] Such as figure 1 As shown, put 160g of diethylenetriamine, 280g of dimer acid and 141g of fatty monoacid into a 1000mL four-necked bottle, stir and heat, keep at 140oC for 2 hours, continue to heat to 160oC for 2 hours, continue to heat to 180oC to keep 2 hours, finally heat to 200oC and hold for 2 hours, then cool down to 160oC and put in 60g of liquid low-viscosity bisphenol A epoxy resin, then raise the temperature to 200oC and keep it for 1 hour, after vacuuming for 2 hours, cool down to 16...

Embodiment 2

[0031] 1. Diethylenetriamine-based low molecular weight 650 epoxy curing agent for epoxy polyamide paint, which is made of the following raw materials in parts by weight:

[0032] Diethylenetriamine 200g, dimer acid 340g, fatty monoacid 180g, bisphenol A epoxy resin 80g, phenol 20g, benzyl alcohol 20g, xylene 20g.

[0033] 2, the preparation method of diethylenetriamine-based low molecular weight 650 epoxy curing agent for epoxy polyamide coating, it comprises the following steps:

[0034] Put 200g of diethylenetriamine, 340g of dimer acid and 180g of fatty monoacid into a 1000 mL reactor in turn, stir and heat, keep at 140oC for 3 hours, continue heating to 165oC for 3 hours, continue heating to 185oC for 3 hours, Finally, after heating to 195oC and keeping it for 3 hours, cool down to 160oC and put 80g of liquid low-viscosity bisphenol A type epoxy resin into it, then raise the temperature to 200oC and keep it for 2 hours. Benzyl alcohol and 20g of xylene are obtained after...

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Abstract

The invention discloses a diethylenetriamine amido low molecular weight 650 epoxy hardener used for epoxy polyamide coating. The Diethylenetriamine amido low molecular weight 650 epoxy hardener used for the epoxy polyamide coating comprises, by weight, 6-10 parts of diethylenetriamine, 10-17 parts of dimer acid, 4-9 parts of fat single acid, 2-4 parts of epoxy resin, 1-4 parts of phenol, 1-4 parts of benzyl alcohol, and 1-4 parts of dimethylbenzene. According to the Diethylenetriamine amido low molecular weight 650 epoxy hardener used for the epoxy polyamide coating, the best raw material composition and ratio are preferably chosen by a large amount of tests. The Diethylenetriamine amido low molecular weight 650 epoxy hardener used for the epoxy polyamide coating has the advantages of being excellent in flexibility and antiseptic property, good in adhesion, good bisphenol A epoxy resin cure activity and compatibility, and wide in application range. According to a preparation method of the low molecular weight 650 epoxy hardener, reaction steps and reaction conditions are chosen through a large amount of technology, so the whole preparation technology is scientific and reasonable in design. Work efficiency is high and controllability is strong. Uniformity of epoxy hardener high-activity and high-phase is ensured, meanwhile, cost can be greatly reduced, industrialisieren mass production can be achieved, and convenience in popularization and application is achieved.

Description

technical field [0001] The invention relates to an epoxy curing agent, in particular to a diethylenetriamine-based low molecular weight 650 epoxy curing agent for epoxy polyamide coatings. Background technique [0002] Low molecular weight polyamide epoxy curing agent has the advantages of good adhesion, flexibility, yellowing resistance and anti-corrosion performance, and is widely used in many fields such as coatings and adhesives. Low molecular weight polyamide epoxy curing agent can be divided into 650 of 200, 300 of 300, 651 of 400, etc. according to the amine value. The preparation method is divided into diethylenetriamine method, triethylenetetramine method, tetraethylene Pentaamine method, pentaethylene hexamine method, hexaethylene heptamine method and polyethylene polyamine method, etc. When the prior art adopts diethylenetriamine method to prepare low-molecular-weight polyamide epoxy curing agent, the improvement of the activity of polyamide epoxy curing agent mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/62C08G59/58C09D163/00C09D7/12
Inventor 樊丰文惠正权
Owner 江苏三木化工股份有限公司
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