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Daiamid epoxy curing agent and preparation method thereof

A polyamide epoxy and curing agent technology, applied in electrophoretic coatings and other directions, to achieve the effects of scientific and reasonable preparation method, good performance, and stable effective performance

Inactive Publication Date: 2009-12-30
FUZHOU BAISHENG FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the difference in formulation and manufacturing process of existing products, there are many problems in the control of color, viscosity, curing speed, volatility, toxicity, toughness of cured products, electrical properties and effective activity in the production process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The components of the raw materials are expressed in parts by weight: 20 parts of dimer fatty acid, 8 parts of ricinoleic acid, 12 parts of ethylenediamine or diethylenetriamine, 15 parts of acetone or butanone, and 0.01 part of quinone.

[0016] The preparation method process is as follows:

[0017] According to the ratio of raw materials, in the pass N 2 Add dimer fatty acid, ricinoleic acid and ethylenediamine or diethylenetriamine into the reaction kettle, then stir the mixture for 30 minutes; then heat up to dehydration, continue heating to 180°C, keep the reaction for 1 hour, cool to 100°C and add Acetone or methyl ethyl ketone, heat up and reflux for 1 hour; after the reflux, heat to recover free acetone or methyl ethyl ketone, keep at 150°C for 1 hour, cool to 180°C and add terminator, then vacuumize, the vacuum degree reaches -0.08MPa (vacuum Figures on the table), keep 0.5 hours; finally cool to 120 ° C, discharge, to obtain ketimidized polyamide epoxy curing...

Embodiment 2

[0019] The components of the raw materials are expressed in parts by weight: 65 parts of dimer fatty acid or trimer fatty acid, 30 parts of cotton oleic acid, 35 parts of triethylenetetramine or tetraethylenepentamine, 32 parts of cyclohexanone or methyl isobutyl ketone part, 0.02 part of boric acid.

[0020] The preparation method process is as follows:

[0021] According to the ratio of raw materials, in the pass N 2 Add dimer fatty acid, cottonoleic acid and triethylenetetramine or tetraethylenepentamine to the reaction kettle, then stir the mixture for 90 minutes; then heat up to dehydration, continue heating to 300°C, keep the reaction for 5 hours, and cool to 135°C Add ketones, heat up and reflux for 10 hours; after reflux, heat to recover free ketones, keep at 250°C for 2 hours, cool to 200°C, add terminator, and then vacuum, the vacuum degree reaches -0.1MPa (the number on the vacuum gauge Shown), kept for 3 hours; finally cooled to 120 ° C, discharged, to obtain ket...

Embodiment 3

[0023] The components of the raw materials are expressed in parts by weight: 40 parts of dimer fatty acid or other poly fatty acid, 10 parts of rapeseed acid, 15 parts of polyethylene polyamine, 20 parts of methyl ethyl ketone, and 0.01 part of aryl polyhydroxy compound terminator.

[0024] The preparation method process is as follows:

[0025] According to the ratio of raw materials, in the pass N 2 Add dimer fatty acid, rapeseed oleic acid and polyethylene polyamine into the reaction kettle, then stir the mixture for 45 minutes; then raise the temperature to dehydration, continue heating to 220°C, keep the reaction for 3 hours, cool to 110°C and add ketones, Heat up and reflux for 4 hours; reheat to recover free ketones after reflux, keep at 170°C for 1.5 hours, cool to 190°C and add terminator, then vacuumize, the vacuum degree reaches -0.09MPa (digital display on the vacuum gauge), keep 1.5 hours; finally cooled to 120°C and discharged to obtain a ketimidated polyamide ep...

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PUM

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Abstract

The invention provides a daiamid epoxy curing agent and a preparation method thereof, which belong to the technical field of chemical products. The daiamid epoxy curing agent comprises the following raw material components: polyfatty acid, vegetable oil acid, fatty amine, ketones, and a terminator. The preparation process of the curing agent comprises the steps of: performing a polymerization reaction of the polyfatty acid, the vegetable oil acid, the fatty amine and the ketones; cooling; adding the terminator; performing vacuum pumping and then cooling to obtain a product. The invention aims at the problems in the prior art, has scientific and reasonable raw material component proportioning and preparation method, and can effectively control the temperature and time of an amidation reaction during the preparation; the moisture and free ketone residual volume are effectively removed; and the product has steady effective property, is used for cathode electrophoretic paint, and ensures that single and double components have good performance.

Description

technical field [0001] The invention belongs to the technical field of chemical products, and more specifically relates to a polyamide epoxy curing agent and a preparation method thereof. Background technique [0002] Cathodic electrophoretic coatings have excellent corrosion resistance and high throwing power, and are the main raw materials for electrophoretic primers for automobiles and other parts. Commonly used cathodic electrophoretic coatings are epoxy cathodic electrophoretic coatings, acrylic cathodic electrophoretic coatings, and polyurethane cathodic electrophoretic coatings. Compared with other curing agents, polyamide epoxy curing agent has good physical and chemical properties and mechanical structure properties, so it has ideal uses for machinery, electrical appliances, petrochemical, aviation, shipbuilding, construction and other industries. Communication equipment also has a wide range of applications. However, due to differences in formulations and manufac...

Claims

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Application Information

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IPC IPC(8): C08G69/26C08G59/44C08G69/28C09D5/44
Inventor 石孟泽
Owner FUZHOU BAISHENG FINE CHEM
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