Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Highly transparent flame-retardant polyvinyl alcohol film based on methyl hypophosphorous acid and preparation method thereof

A technology of polyvinyl alcohol film and methyl hypophosphorous acid, which is applied in the field of polymer chemistry, can solve the problems of reduced flame retardant efficiency, unstable film properties, easy changes in film properties, etc., and achieves high flame retardant efficiency and high retention rate. , the effect of high oxygen index

Active Publication Date: 2021-12-28
JIANGHAN UNIVERSITY
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flame-retardant PVA materials provided by the above-mentioned patent documents are all opaque, and the additives are inert. They are physically mixed with PVA and do not chemically react with PVA. They are easy to migrate out of the film after encountering water during use, reducing its resistance. fuel efficiency, the properties of the film become unstable
[0004] In the process of realizing the present invention, the inventors have found that there are at least the following problems in the prior art: it is difficult to realize the uniformity of high-efficiency flame-retardant and high transparency for flame-retardant PVA transparent films, and the combination of flame retardants and PVA is not stable enough, so that lead to changes in film properties

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
  • Highly transparent flame-retardant polyvinyl alcohol film based on methyl hypophosphorous acid and preparation method thereof
  • Highly transparent flame-retardant polyvinyl alcohol film based on methyl hypophosphorous acid and preparation method thereof
  • Highly transparent flame-retardant polyvinyl alcohol film based on methyl hypophosphorous acid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Synthesis of MeHP

[0044] Take 1 mol of methyl dichlorophosphine slowly dropwise into 2 mol of water, react at 50°C for 2 hours, and then remove the generated hydrogen chloride gas under reduced pressure to obtain colorless liquid methyl phosphinic acid MeHP.

[0045] The structure of MeHP is tested by phosphorus nuclear magnetic resonance analyzer, and the results are as follows: figure 1 shown. MeHP 31 Two P resonance shift peaks (25.68 and 22.83ppm) appeared in the P-NMR spectrum. This is because MeHP has two isomers.

[0046] Preparation of PVA aqueous solution

[0047] Polyvinyl alcohol is dissolved in water, and stirred at 95° C. for 5 hours until the PVA is completely dissolved in water to form a transparent aqueous solution with a mass percentage of PVA of 10%.

Embodiment 2

[0049]Take 95g of PVA transparent aqueous solution with a concentration of 10% by mass, add 0.5g of MeHP, and stir mechanically at room temperature for 20min. After mixing evenly, a mixed solution containing MEHP and PVA is obtained, based on the mass sum of MeHP and PVA in the mixed solution , the mass content of MEHP in the mixed solution is 5%. The mixed solution was coated on the substrate, and dried according to the temperature rise program of 50°C / 8hr+100°C / 4hr to obtain a highly transparent flame-retardant PVA film with a film thickness of 200μm.

Embodiment 3

[0051] Get 90g of the PVA transparent aqueous solution with a concentration of 10% by mass, add 1g of MeHP, and mechanically stir for 20min at normal temperature. After mixing evenly, a mixed solution containing MEHP and PVA is obtained. Based on the mass sum of MeHP and PVA in the mixed solution, The mass content of MEHP in the mixed solution is 10%. The mixed solution was coated on the substrate, and dried according to the temperature rise program of 50°C / 8hr+100°C / 4hr to obtain a highly transparent flame-retardant PVA film with a film thickness of 200μm.

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
limiting oxygen indexaaaaaaaaaa
limiting oxygen indexaaaaaaaaaa
Login to View More

Abstract

The invention discloses a highly transparent flame-retardant PVA film and a preparation method thereof. The PVA film has excellent flame-retardant performance, a flame retardant can be stably combined with the PVA, and the flame-retardant PVA film has high transparency. The preparation method is to form a film from a mixed solution containing methyl hypophosphorous acid and PVA to prepare the highly transparent flame-retardant PVA film, based on the sum of the quality of methyl hypophosphorous acid and PVA in the mixed solution, the mixed solution The mass content of methyl hypophosphorous acid in the solution is 1%-20%.

Description

technical field [0001] The invention relates to the technical field of polymer chemistry, in particular to a highly transparent flame-retardant polyvinyl alcohol film based on methyl hypophosphorous acid and a preparation method thereof. Background technique [0002] As people's research on composite materials continues to deepen, transparent polymers have shown important application value in the frontier fields of today's material research, such as organic light-emitting diodes, flexible solar cells, wearable smart devices, and aerospace. Polyvinyl alcohol (PVA) is one of the most widely used polymer materials at present. It has excellent light transmission, film-forming properties, gas barrier properties and biodegradability, making it have a good application prospect in electronic materials. However, the PVA material is extremely flammable and has a low oxygen index, which seriously affects its application in the above-mentioned fields. In addition, uncrosslinked PVA is e...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08K5/5313C08J5/18
CPCC08J5/18C08J2329/04C08K5/5313
Inventor 刘学清刘志宏高淑玉刘继延邹立勇石红尤庆亮陈佳
Owner JIANGHAN UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com