Additive for processing polyvinyl alcohol and preparation method thereof

A polyvinyl alcohol and additive technology, applied in the chemical industry, can solve the problems of easy yellowing of materials, easy shrinkage of hydroxyl groups, easy yellowing, etc.

Active Publication Date: 2019-03-19
HUAIHUA UNIV
View PDF4 Cites 0 Cited by
  • 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 yel

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Additive for processing polyvinyl alcohol and preparation method thereof
  • Additive for processing polyvinyl alcohol and preparation method thereof
  • Additive for processing polyvinyl alcohol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0050] 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:

[0051] Condensation reaction of any one of the above quaternary ammonium salts with hydroxyethyl group and phthaloyl chloride to obtain quaternary ammonium terephthalate.

[0052] 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.

[0053] Preferably, the amount of the quaternary ammonium salt with hydroxyethyl group and phthaloyl chloride is 1:(1.1˜1.2).

[0054] In one embodiment, when the number of hydroxyethyl groups in the quaternary ammonium salt with hydroxyethyl group...

Embodiment 1

[0083] Example 1N, N-dimethylethanolamine (DMEA) and 2-bromoethanol synthesize two (hydroxyethyl) dimethyl quaternary ammonium bromide

[0084]

[0085] 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.

[0086] When the reaction condition was 86°C for 5 hours, the product was a white powder with a yield of 62.2%.

[0087] When the reaction condition was 88°C for 2.5h, the product was a white powder with a yield of 96.26%.

[0088] When the reaction condition was 88°C for 9 hours, the product was a white powder with a yield of 40.6%.

[0089] 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

[0090] Example 2 Triethylenediamine (TEDA) and 2-bromoethanol synthesize brominated N, N'-diethanoltriethylenediamine quaternary ammonium salt

[0091]

[0092] 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%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to an additive for processing polyvinyl alcohol (PVA) and a preparation method thereof. The additive comprises at least one type of quaternary ammonium salt with hydroxyethyl. Aresearch finds that the quaternary ammonium salt with hydroxyethyl is used as the additive for processing the polyvinyl alcohol; the quaternary ammonium salt is an ion type compound and has relativelygood solubility with the PVA; the quaternary ammonium salt with hydroxyethyl can be used as a small molecule and acts between PVA macromolecules, and the Van der Waals acting force between the PVA macromolecules is reduced, so that the flowability of processing is improved and the melting point in a PVA processing process is reduced, and furthermore, the processing temperature can be reduced; theproblem that hydroxyl is likely to shrink in the processing process is avoided, so that the problem that a material obtained by processing the polyvinyl alcohol easily becomes yellow and the problemthat the small molecules are easy to dialyze are overcome; and meanwhile, the energy consumption of processing is also reduced.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to an additive for processing polyvinyl alcohol and a preparation method thereof. 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 capable of avoiding yellowing and small molecule dialysis of polyvinyl alcohol processed materials and a preparation method thereof. [0004] The technical scheme that the present inven...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08K5/19C08L29/04
CPCC08K5/19C08L29/04
Inventor 胡扬剑舒友陈迪钊欧阳跃军刘竞文
Owner HUAIHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap