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Hyperbranched polymer and preparation method thereof and application of hyperbranched polymer in preparation of electropolarized color-changing film

A hyperbranched polymer, color-changing film technology, applied in chemical instruments and methods, color-changing fluorescent materials, etc., can solve the problems of unsatisfactory minimum transmittance, complex processing technology, and limited application scenarios of smart glass technology, and achieve excellent The effect of fluidity and film-forming properties, high process repeatability, and wide discoloration range

Active Publication Date: 2021-12-10
SHAOXING DIFEI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The minimum transmittance of PDLC smart glass technology is not ideal, the maximum / minimum transmittance ratio is small, and the application scenarios are limited
Although conductive polymer electrochromic technology can solve the problem of the minimum transmittance of PDLC, its processing technology is complicated, its discoloration speed is slow, its life is short, and its cost is high. use on

Method used

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  • Hyperbranched polymer and preparation method thereof and application of hyperbranched polymer in preparation of electropolarized color-changing film
  • Hyperbranched polymer and preparation method thereof and application of hyperbranched polymer in preparation of electropolarized color-changing film
  • Hyperbranched polymer and preparation method thereof and application of hyperbranched polymer in preparation of electropolarized color-changing film

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preparation example Construction

[0052] The preparation method of polyoctyl methacrylate: add 19.8g of isooctyl methacrylate (purchased from Hubei Nona Technology Co., Ltd.) and 100mL of ethyl acetate into a 250mL three-necked bottle, and after passing through nitrogen for 15min to remove the air, add 4mL of 1-hexanethiol, the temperature was raised rapidly to 75°C, and 328mg / 35mL of azobisisobutyronitrile (AIBN) in ethyl acetate was slowly added, and the reaction was stopped after 10h of reaction. After extraction, washing, rotary evaporation, and vacuum distillation to remove low-boiling fractions, polylauryl methacrylate is obtained. Its viscosity is 2100cps tested by rotational viscometer. 1 H-NMR (500MHz, CDCl 3 ,δ): 6.42-6.48(m,2H),3.99(m,2H),2.10(m,3H),0.90-1.60(m,15H).

[0053] The preparation method of polydecyl methacrylate is similar to that of polydecyl methacrylate. Finally, the viscosity of polydecyl methacrylate was 2300 cps. 1 H-NMR (500MHz, CDCl 3 ,δ): 6.40-6.50(m,2H),3.97(m,2H),2.01(m,3H)...

Embodiment 1

[0055] (1) Add 136.2g of methyltrimethoxysilane (purchased from Shanghai Macklin Biochemical Technology Co., Ltd.) and 18g of deionized water into a 500mL three-necked flask, stir well, then add glacial acetic acid dropwise into the three-necked flask solution until the pH value of the reaction system is 5.5. Then, the temperature was rapidly raised to 50° C., and after 4 hours of reaction, the temperature was lowered to end the reaction. The obtained crude product was extracted, rotated and evaporated, and the low-boiling point fraction was removed by vacuum distillation to obtain 105 g of P1 precursor. Its viscosity was measured with a rotational viscometer to be 4500cps.

[0056] (2) Add 100 g of P1 prepolymer and 300 mL of toluene into a 1 L three-necked flask, and blow nitrogen gas for 15 min. Then the temperature of the system was rapidly raised to 110° C., and 0.2 g of stannous octoate (purchased from Shanghai McLean Biochemical Technology Co., Ltd.) and 30 g of 3-met...

Embodiment 2

[0062] (1) Add 198g of phenyltrimethoxysilane (purchased from Jiande Zhiyou Silicon Materials Co., Ltd.) and 18g of deionized water into a 500mL three-necked flask, stir well, then add ice Acetic acid solution until the pH value of the reaction system is 5.5. Then, the temperature was rapidly raised to 50° C., and after 4 hours of reaction, the temperature was lowered to end the reaction. After the obtained crude product was extracted, rotated and evaporated, the low-boiling fraction was removed by vacuum distillation to obtain 150 g of P2 precursor. Its viscosity measured with a rotational viscometer is 5300cps.

[0063] (2) Add 100 g of P2 precursor and 300 mL of toluene into a 1 L three-necked flask, and blow nitrogen gas for 15 min. Then the temperature was raised rapidly to 110° C., 0.2 g of stannous octoate and 30 g of 3-methacryloxypropyldimethylmethoxysilane were added, and reacted for 4 hours, and then the reaction was stopped. After the reactant was cooled to room...

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Abstract

The invention discloses a hyperbranched polymer and a preparation method thereof and application of the hyperbranched polymer in preparation of an electric polarization color-changing film. According to the invention, the hyperbranched polymer disclosed by the invention is of a highly branched three-dimensional structure and has abundant ultraviolet-curable side chain groups; the electropolarized color-changing film prepared from the novel hyperbranched polymer has relatively high bonding strength; and the novel hyperbranched polymer can be prepared into an electropolarized color-changing film with various electric polarization particles, has the advantages of excellent performance, rapid processing, wide application range, good stability and the like, and is suitable for large-scale practical application in the future.

Description

technical field [0001] The invention relates to the field of preparation of novel hyperbranched polymers with topological structure, in particular to a hyperbranched polymer, its preparation method and its application in the preparation of electropolarized color-changing films. Background technique [0002] Because of its ability to provide heat insulation, temperature control, energy saving, privacy and many other functions, smart dimming film is widely used in construction, home furnishing, automobiles and other fields, and has high social and commercial significance. Smart dimming film technology has been developed for a long time and is extremely challenging. At present, there are two types of smart glass based on electrochromic technology on the market: smart glass technology based on polymer dispersed liquid crystal color (PDLC) and smart glass technology based on conductive polymer electrochromic (EC). Polymer dispersed liquid crystal technology is to disperse liquid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/20C08G77/14C08J5/18C08L83/07C08L33/10C08K3/22C09K9/00
CPCC08G77/20C08G77/14C09K9/00C08J5/18C08J2383/07C08J2433/10C08K2003/2241C08K2201/011C08K2003/2296
Inventor 罗威谢龙豪胡志诚王鹏飞
Owner SHAOXING DIFEI NEW MATERIAL CO LTD
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