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Ketimine and preparation method thereof

A technology of ketimine and modified amine, which is applied in the field of ketimine and its preparation, can solve the problems of decreased corrosion resistance, shortened pot life of coating film, and decreased adhesion, so as to improve leveling and reduce costs Effect

Active Publication Date: 2014-01-22
常熟耐素生物材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the curing reaction is too fast, the pot life of the coating film will be shortened. If the curing speed is too fast, part of the water will be wrapped under the cured coating film and it will be difficult to volatilize, which will bring a series of disadvantages to the coating film, such as decreased adhesion, The glossiness of the coating film decreases, the coating film becomes blurred, and the corrosion resistance decreases.

Method used

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  • Ketimine and preparation method thereof
  • Ketimine and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Add 302 grams of m-C15 plant phenol (partially hydrogenated, iodine value between 150-200) into a three-necked flask, then add 50 grams of hexamethylenetetramine, and add 50 grams of water after mechanical stirring. The reaction system was protected with ammonia gas, heated to 65°C, and the reaction temperature was raised to 85°C after holding the reaction for 2 hours. After the heat preservation reaction was continued for 2 hours, 380 g of the reaction product was obtained by dehydration under normal pressure at 130°C. The reaction product is a modified amine, and the modified amine has the following characteristics: a viscosity of 920 cps (25° C.), and an amine value of 145.

Embodiment 2

[0032] Add 302 grams of m-C15 plant phenol (partially hydrogenated, iodine value is 150-200) into a three-necked flask, then add 60 grams of hexamethylenetetramine, start mechanical stirring, and then add 60 grams of water. The reaction system was protected with ammonia gas, the reaction temperature was raised to 70°C, and the reaction temperature was raised to 85°C after holding the reaction for 2 hours. Continue the heat preservation reaction for 2 hours, and dehydrate under normal pressure at 130° C. to obtain 390 g of the reaction product. The reaction product is a modified amine, and the modified amine has the following characteristics: a viscosity of 1050 cps (25° C.), and an amine value of 185.

Embodiment 3

[0034] Add 302 grams of m-C15 plant phenol (partially hydrogenated, iodine value is 150-200) into a three-necked flask, then add 50 grams of hexamethylenetetramine, add 100 grams of water after mechanical stirring. The reaction system is protected by ammonia gas, heated to 65-67° C., and the reaction temperature is raised to 80-85° C. after holding the heat for 2 hours. After continuing the heat preservation reaction for 2 hours, dehydration under normal pressure at 130-135° C. to obtain 385 grams of the reaction product. The reaction product is a modified amine, and the modified amine has the following characteristics: a viscosity of 900 cps (25° C.), and an amine value of 155.

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Abstract

The invention relates to ketimine and a preparation method thereof. The ketimine is a compound as shown in a structural formula (I), wherein R3 is-C15H31-m', and m' is equal 0, 1, 2. The preparation method comprises the following steps: firstly carrying out catalytic hydrogenation or partial catalytic hydrogenation on meta-C15 plant phenol, then further reacting and synthesizing modified amine by using the meta-15 plant phenol as a raw material, finally reacting by using the modified amine so as to obtain the novel ketimine. Compared with like products, the novel ketimine has the advantages that the leveling property and the corrosion resistance are improved, the curing speed is accelerated while the operation period is prolonged, and meanwhile the cost is reduced.

Description

technical field [0001] The present invention relates to ketimine and its preparation method. Background technique [0002] At present, the curing agents that can be used for water-based epoxy resin coatings mainly include the following categories: 1. Epoxy adducts of aliphatic amines and alicyclic amines; 2. Salts of amino-terminated polyamides (amidoamines); 3. Amino-terminated polyamide (amidoamine)-epoxy adduct; 4. Modified amino-terminated amide compound. Early water-soluble curing agents were mostly salts of amino-terminated polyamides or aliphatic amine-epoxy adducts modified by salt formation, but their compatibility with epoxy resins was poor, and due to the use of salt-formation modification technology, which improves the sensitivity of the coating film to water and reduces the corrosion resistance of the coating film, and the volatilization of water during the curing process has always been a problem. Since water is a solvent with a high specific heat capacity, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/50C09D163/00C09D7/12C07C251/08C07C249/02
Inventor 戴志成
Owner 常熟耐素生物材料科技有限公司
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