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Hydroxymethyl diamine compound and preparation method and application thereof

A technology of methyloldiamine and compounds, which is applied in the field of methyloldiamine compounds and their preparation, can solve problems such as poor curing effect, reduced activity, and reduced toxicity, and achieve enhanced tensile strength and compressive strength, and improved activity. Effect of H increase, high degree of polymerization and viscosity

Active Publication Date: 2014-04-23
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, although there are many kinds of diamine compounds as material additives, there are certain problems. People hope to obtain some new diamine compounds with higher activity that can have curing or chain extension effects, or can be used as Raw materials for the preparation of high-performance nylon
[0011] The mechanism of action of amine curing agent is mainly through the active H on N to catalyze the ring opening of epoxy resin and produce curing effect after polymerization. Bad smell, but poor curing effect, mainly due to COOH and NH of amino acids 2 Intramolecular hydrogen bonds are generated to reduce the activity of H, but if the carboxylic acid is reduced to hydroxymethyl, the activity of H increases, the bad smell of pentamethylenediamine is shielded, and the toxicity is also greatly reduced

Method used

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  • Hydroxymethyl diamine compound and preparation method and application thereof
  • Hydroxymethyl diamine compound and preparation method and application thereof
  • Hydroxymethyl diamine compound and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032]

[0033] Preparation of 2,3-diaminopropanol: Take 10.0g 2,3-diaminopropionic acid and 500mL water, put them in a pressurized autoclave, add 0.5g Pd, seal it and pass in H 2 , react at 120°C for 7 hours at a pressure of 8 MPa, and after cooling, remove the catalyst by filtration and concentrate water to obtain an oil, collect fractions under reduced pressure to obtain 6.0 g of a colorless transparent liquid. ESI-MS: 91.2 [M+H + ].

Embodiment 2

[0035]

[0036] Preparation of 2,3-diaminopropanol: Take 10.0g of methyl 2,3-diaminopropionate and 500mL of water, put them in an autoclave, add 1.0g of Raney Ni, seal it and inject H 2 , at a pressure of 6MPa, reacted at 60°C for 5h, after cooling, filtered to remove the catalyst, concentrated water to obtain an oil, collected fractions under reduced pressure to obtain 6.3g of a colorless transparent liquid. ESI-MS: 91.2 [M+H + ].

Embodiment 3

[0038]

[0039] According to the method of Example 2, 10.0 g of ethyl 2,3-diaminopropanoate was hydrogenated and reduced by Raney Ni to obtain 6.0 g.

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Abstract

The invention discloses a hydroxymethyl diamine compound which is shown as a general formula (I), wherein X is methyl-substituted or ethyl-substituted C1-C6 linear alkyl, and n is 0,1,2 or 3. The invention also discloses a preparation method for the compound and application of the compound. The compound has the curing and chain extension effects, and can be used as raw materials for synthesizing nylon.

Description

technical field [0001] The invention belongs to the technical fields of chemical engineering and material additives, and specifically relates to methyloldiamine compounds and their preparation methods and applications. Background technique [0002] Curing agent, also known as hardening agent, curing agent or stabilizer, is a kind of substance or mixture that promotes or controls the curing reaction. Resin curing is through chemical reactions such as condensation, ring closure, addition or catalysis, so that the thermosetting resin undergoes an irreversible change process, and curing is completed by adding a curing agent. [0003] According to the temperature required for curing, it can be divided into two types: heating curing agent and room temperature curing agent. According to different chemical structure types, it can be divided into amine curing agent, acid anhydride curing agent, imidazole curing agent, resin curing agent and latent curing agent. According to the dif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C215/18C07C213/00C08G59/64C08G18/32C08G69/26
Inventor 欧阳平凯郭凯仲蕙方正
Owner NANJING TECH UNIV