Check patentability & draft patents in minutes with Patsnap Eureka AI!

Macromolecular photoinitiator for gradient polymerization and synthesis method and application thereof

A photoinitiator and macromolecular technology, applied in the field of polymer material synthesis, can solve the problems of photocuring surface oxygen inhibition and other problems

Inactive Publication Date: 2011-09-07
BEIJING UNIV OF CHEM TECH
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Gradient polymerization is achieved by introducing organic silicon segments into the photoinitiator molecule, and at the same time, it effectively solves the problem of oxygen inhibition on the photocuring surface

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
  • Macromolecular photoinitiator for gradient polymerization and synthesis method and application thereof
  • Macromolecular photoinitiator for gradient polymerization and synthesis method and application thereof
  • Macromolecular photoinitiator for gradient polymerization and synthesis method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Synthesis of 184-Tego2342 Silicone Macromolecular Photoinitiator

[0053] 7g (2.5mmol) of Tegomer 2342 (DEGUSSA company) whose molecular formula is Formula 1 and 1.133g (5.5mmol) of DCC (dicyclohexylcarbodiimide) were dissolved in 150mL of ethyl acetate, and stirred at room temperature for 30 Minutes, 1.02 g (5 mmol) Irgacure 184 (1-hydroxycyclohexyl phenyl ketone) was added dropwise, and the reaction was carried out at room temperature for 24 hours after the addition. After filtering, the filtrate was washed three times with 5% NaOH solution and deionized water, and finally the solvent was distilled under vacuum to obtain a liquid product with a molecular formula of Formula 2. The number-average molecular mass was determined to be 3001 by gel chromatography (GPC). In the infrared spectrum, 3300cm -1 The nearby hydroxyl absorption peak disappears at 1752cm -1 The characteristic absorption peak of ester group appeared.

[0054]

[0055] From the product informatio...

Embodiment 2

[0058] Synthesis of HBP-Tego2342 Silicone Macromolecular Photoinitiator

[0059] 7g (2.5mmol) of Tegomer 2342 (DEGUSSA company) whose molecular formula is Formula 1 and 1.133g (5.5mmol) of DCC (dicyclohexylcarbodiimide) were dissolved in 150mL of ethyl acetate, and stirred at room temperature for 30 Minutes, 0.99g (5mmol) of HBP (4-hydroxybenzophenone) was added dropwise, and the reaction was completed at room temperature for 24 hours. After filtering, the filtrate was washed three times with 5% NaOH solution and deionized water, and finally the solvent was distilled under vacuum to obtain a liquid product with a molecular formula of Formula 3. The number-average molecular mass was determined to be 2993 by gel chromatography (GPC). In the infrared spectrum, 3145cm -1 The nearby hydroxyl absorption peak disappears at 1704cm -1 The characteristic absorption peak of ester group appeared.

[0060]

Embodiment 3

[0062] Synthesis of 1173-Tego2342 Silicone Macromolecular Photoinitiator

[0063] 7g (2.5mmol) of Tegomer 2342 (DEGUSSA company) whose molecular formula is Formula 1 and 1.133g (5.5mmol) of DCC (dicyclohexylcarbodiimide) were dissolved in 150mL of ethyl acetate, and stirred at room temperature for 30 Minutes, 0.821g (5mmol) 1173 (2-hydroxy-2-methyl-1-phenyl-1-propanone) was added dropwise, and the reaction was completed at room temperature for 24 hours. After filtering, the filtrate was washed three times with 5% NaOH solution and deionized water, and finally the solvent was distilled under vacuum to obtain a liquid product with a molecular formula of Formula 4. The number-average molecular mass was determined to be 2956 by gel chromatography (GPC). In the infrared spectrum, 3300cm -1 The nearby hydroxyl absorption peak disappears at 1750cm -1 The characteristic absorption peak of ester group appeared.

[0064]

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 discloses a macromolecular photoinitiator for gradient polymerization and performance research thereof. The photoinitiator is characterized in that: an organic silicon macromolecular photoinitiator is prepared by reacting organic silicon polymer with a micromolecular photoinitiator. The photoinitiator is applied to the gradient polymerization, polymer with molecular weight in gradient change can be obtained by one-time polymerization, the gradient change of the molecular weight is uniform along the vertical direction, and an obvious component interface does not exist; in addition, the photoinitiator overcomes the defects that the micromolecular photoinitiator is easy to yellow, volatilize and migrate, has high toxicity and low heat resistance, and the like, has a spontaneous floating capability due to the characteristics of low surface energy and surface tension of organic silicon, and effectively prevents oxygen polymerization inhibition.

Description

[0001] This application is a division of application number 2009100885362. technical field [0002] The invention relates to a macromolecular photoinitiator for gradient polymerization and a preparation method thereof, belonging to the field of polymer material synthesis. Background technique [0003] Gradient polymer refers to a new type of material in which the elements (composition, structure) that make up the polymer change continuously from one side to the other in a certain direction, and the properties and functions of the material also change in a gradient. Molecular weight is a basic element of polymers, which has a great influence on the performance and processing properties of polymers. When the molecular weight of the polymer changes, the properties of the polymer such as mechanical properties (strength, etc.), optical properties (refractive index, etc.), thermal properties (glass transition temperature, etc.), electrical properties (electrical conductivity, etc....

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 Applications(China)
IPC IPC(8): C08F2/48
Inventor 孙芳聂俊
Owner BEIJING UNIV OF CHEM TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com