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A latent polythioether-based polythiol, its synthesis method and application

A synthesis method and polysulfide technology, applied in the field of polysulfide-based polymers, can solve the problems affecting the efficient corrosion inhibition performance of corrosion inhibitors, storage conditions, etc., and achieve high yield, simple operation and mild reaction conditions. Effect

Active Publication Date: 2018-07-03
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because mercapto is easily oxidized in the air to form S-S chemical bonds, which affects its high-efficiency corrosion inhibition performance as a corrosion inhibitor, it must be stored in an air-isolated environment, so its application is limited by storage conditions.

Method used

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  • A latent polythioether-based polythiol, its synthesis method and application
  • A latent polythioether-based polythiol, its synthesis method and application
  • A latent polythioether-based polythiol, its synthesis method and application

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Experimental program
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Effect test

Embodiment 1

[0030] In this embodiment, the structural formula of latent polythioether-based polythiol is:

[0031]

[0032] The preparation method of above-mentioned latent polythioether-based polythiol comprises the steps:

[0033] (1) Add 1 molar portion of propynyl glycidyl ether and 1 molar portion of thioacetic acid successively in the reactor to react to generate alkynyl thioacetate;

[0034] (2) Add 1 mole part of propylene thiol, the alkynyl thioacetate obtained in step (1), and 0.01 mole part of azobisisobutyronitrile in the reactor, and carry out acetyl- Alkyne addition polymerization reaction for 1 hour;

[0035] (3) washing the product obtained in step (2) with dilute hydrochloric acid, evaporating to remove the solvent, and then precipitating and drying to obtain an acetyl compound containing a β-ester group, that is, a latent polythioether-based polythiol;

[0036] figure 1 is the product obtained in the above step (3) 1 H NMR spectrum.

[0037] Dissolve the product ob...

Embodiment 2

[0041] In this embodiment, the structural formula of latent polythioether-based polythiol is:

[0042]

[0043] The preparation method of above-mentioned latent polythioether-based polythiol comprises the steps:

[0044] (1) add 1-alkynyl-4-epoxy pentane of 1 mole part, the thioacetic acid of 1 mole part successively in reactor, react and generate alkynyl thioacetate;

[0045] (2) Add 1 mole part of propylene thiol, the alkynyl thioacetate obtained in step (1), and 0.1 mole part of azobisisobutyronitrile in the reactor, and carry out acetyl- Alkyne addition polymerization reaction for 1 hour;

[0046] (3) The product obtained in step (2) is washed with dilute hydrochloric acid, evaporated to remove the solvent, then precipitated and dried to obtain an acetyl compound containing a β-ester group, that is, a latent polythioether-based polythiol;

[0047] The product obtained in step (3) was dissolved in 10 mole parts of toluene, and 0.1 mole part of N,N-dimethylaniline was a...

Embodiment 3

[0049] In this embodiment, the structural formula of latent polythioether-based polythiol is:

[0050]

[0051] The preparation method of above-mentioned latent polythioether-based polythiol comprises the steps:

[0052] (1) Add 1 molar portion of 2-butyne-3-oxirane and 1 molar portion of thioacetic acid successively in the reactor to react to generate alkynyl thioacetate;

[0053] (2) Add 1 mole part of propylene thiol, the alkynyl thioacetate obtained in step (1), and 0.01 mole part of azobisisobutyronitrile in the reactor, and carry out acetyl- Alkyne addition polymerization reaction for 24 hours;

[0054] (3) The product obtained in step (2) is washed with dilute hydrochloric acid, evaporated to remove the solvent, then precipitated and dried to obtain an acetyl compound containing a β-ester group, that is, a latent polythioether-based polythiol;

[0055] Dissolve the product obtained in step (3) in 10 molar parts of tetrahydrofuran, add 0.5 molar parts of N,N-dipropy...

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Abstract

The invention provides a polythioether polythiol, which contains a large amount of thioacetate in its side chain structure, and the mercapto group is protected by an acetyl group, so that the polythiol is quite stable and forms a latent polythioether-based polythiol. Easy to store. Under the condition of tertiary amine catalyst, the latent polythioether-based polythiol can rapidly undergo acetyl transfer reaction at room temperature, exposing a large number of sulfhydryl groups, so that it can form sulfur-copper bonds with copper, and at the same time, the thiol bonds in the molecular chain pass through Self-condensation can be adsorbed on copper and cross-linked to form a corrosion-inhibiting film coating, so it can be used as a copper corrosion inhibitor to effectively protect the copper substrate from external corrosion.

Description

technical field [0001] The invention relates to a polythioether-based polymer, in particular to a latent polythioether-based polythiol, its synthesis method and application. Background technique [0002] Copper and its alloys have excellent strength, machinability, electrical conductivity, and thermal conductivity, so they are widely used in many fields such as electronics, communications, electrical engineering, light industry, machinery manufacturing, construction and defense industries, and metal ornaments. It is an indispensable and important metal material in the electronics, communication and electrical industries. However, copper corrodes in environments such as the atmosphere, oxygenated water, oxidizing acids, and electrolyte solutions. Therefore, the anti-corrosion protection of copper is one of the important factors to maintain its stable performance. [0003] At present, people have adopted many methods to protect copper from corrosion, the most important of wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G75/04C08G75/0268C23F11/173
Inventor 陈永悦韩金彭叔森乌学东曹慧军
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI