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Application of quaternary ammonium salt with hydroxyethyl group in polyvinyl alcohol processing

A technology of polyvinyl alcohol and hydroxyethyl, which is applied in the chemical industry and can solve the problems of easy shrinkage of hydroxyl, easy yellowing, and easy yellowing of materials

Active Publication Date: 2021-07-20
HUAIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since polyvinyl alcohol contains hydroxyl groups and its melting point is low, the hydroxyl groups tend to shrink during processing, causing the material to turn yellow easily; Glycerin, pentaerythyl alcohol, mannitol and other additives, however, after a long time, the material is prone to the problem of small molecule dialysis

Method used

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  • Application of quaternary ammonium salt with hydroxyethyl group in polyvinyl alcohol processing
  • Application of quaternary ammonium salt with hydroxyethyl group in polyvinyl alcohol processing
  • Application of quaternary ammonium salt with hydroxyethyl group in polyvinyl alcohol processing

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preparation example Construction

[0048]The present invention also provides a terephthalate quaternary ammonium salt used as a nucleating agent for polyester PET or a polymer electrolyte material and a preparation method thereof in one embodiment. This preparation method comprises the steps:

[0049] Condensation reaction of any one of the above quaternary ammonium salts with hydroxyethyl group and phthaloyl chloride to obtain quaternary ammonium terephthalate.

[0050] The preparation method of the above-mentioned terephthalate quaternary ammonium salt is simple, and the prepared terephthalate quaternary ammonium salt has certain ion conductivity, which can be used for the solid electrolyte component of the battery and can also be used for PET nucleating agent.

[0051] Preferably, the amount of the quaternary ammonium salt with hydroxyethyl group and phthaloyl chloride is 1:(1.1˜1.2).

[0052] In one embodiment, when the number of hydroxyethyl groups in the quaternary ammonium salt with hydroxyethyl groups...

Embodiment 1

[0081] Example 1N, N-dimethylethanolamine (DMEA) and 2-bromoethanol synthesize two (hydroxyethyl) dimethyl quaternary ammonium bromide

[0082]

[0083] Add DMEA and 2-bromoethanol according to the ratio of the amount of substances at 1:1.2, dehydrate toluene (boiling point 110.6°C) as solvent, and use diethyl ether as precipitant.

[0084] When the reaction condition was 86°C for 5 hours, the product was a white powder with a yield of 62.2%.

[0085] When the reaction condition was 88°C for 2.5h, the product was a white powder with a yield of 96.26%.

[0086] When the reaction condition was 88°C for 9 hours, the product was a white powder with a yield of 40.6%.

[0087] Based on the above experiments, the more suitable reaction temperature for the synthesis of quaternary ammonium salts from N,N-dimethylethanolamine and 2-bromoethanol is 88°C, and the reaction time is about 2.5h.

Embodiment 2 3

[0088] Example 2 Triethylenediamine (TEDA) and 2-bromoethanol synthesize brominated N, N'-diethanoltriethylenediamine quaternary ammonium salt

[0089]

[0090] In a 100mL three-necked flask, put 50nL of dry toluene, then add 0.1 mole of triethylenediamine and 0.21 mole of 2-bromoethanol, heat up to 95°C under stirring, react for 12h, cool to room temperature, add ether, and obtain a white precipitate. The crude product was isolated. The crude product was dissolved in ethanol and then precipitated with ether to isolate the product with a yield of 36.2%.

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Abstract

The invention relates to the application of quaternary ammonium salt with hydroxyethyl group in polyvinyl alcohol processing. Research has found that quaternary ammonium salts with hydroxyethyl groups are used as additives for polyvinyl alcohol processing, and quaternary ammonium salts with hydroxyethyl groups are ionic compounds, which have good solubility with PVA, and quaternary ammonium salts with hydroxyethyl groups Ammonium salt can act as a small molecule between PVA macromolecules, reducing the van der Waals force between PVA macromolecules, thereby improving the fluidity of processing, lowering the melting point of PVA during processing, thereby reducing the processing temperature and avoiding the The problem that the hydroxyl group is easy to shrink during the processing process overcomes the problems that the material produced by polyvinyl alcohol is easy to turn yellow and small molecules are easy to dialysis, and at the same time reduces the processing energy consumption.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to the application of a quaternary ammonium salt with hydroxyethyl group in polyvinyl alcohol processing. Background technique [0002] Polyvinyl alcohol (PVA) is often used as raw materials for coatings, film-forming materials, and melt-extruded plastics. Its melting point is 230-240°C. Since polyvinyl alcohol contains hydroxyl groups and its melting point is low, the hydroxyl groups tend to shrink during processing, causing the material to turn yellow easily; Glycerin, pentaerythyl alcohol, mannitol and other additives, however, after a long period of time, the material is prone to the problem of small molecule dialysis. Contents of the invention [0003] Based on this, it is necessary to provide an additive that can avoid the yellowing and small molecule dialysis of polyvinyl alcohol processing materials in polyvinyl alcohol processing, that is, the quaternary ammoni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08K5/3445C08K5/19C08G63/685
CPCC08G63/6854C08G63/6856C08K5/19C08K5/3445C08L29/04
Inventor 胡扬剑刘竞文舒友陈迪钊罗琼林
Owner HUAIHUA UNIV
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