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

Bismaleimide polymer allowing long-term storage and preparation method thereof

A bismaleimide, maleimide phenoxy technology, applied in the field of bismaleamide polymer and its preparation, can solve the change of product chemical structure, limit storage time and application field, polymerization reaction or Curing reaction and other problems, to achieve the effect of expanding application methods and application fields, prolonging storage period, and improving chemical structure

Inactive Publication Date: 2016-04-06
CHINA AUTOMOTIVE BATTERY RES INST CO LTD
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to long-term storage at room temperature, the chemical properties of bismaleimide polymers in the form of solutions or colloids are far less stable than those in solid forms, and further polymerization or curing reactions are prone to occur, resulting in changes in the chemical structure of the product, which greatly limits Its preservation time and application field

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
  • Bismaleimide polymer allowing long-term storage and preparation method thereof
  • Bismaleimide polymer allowing long-term storage and preparation method thereof
  • Bismaleimide polymer allowing long-term storage and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Bismaleimide polymers were prepared as follows:

[0041] (1) Put 20g of N,N'-(methylenediphenyl)bismaleimide into a 250mL three-necked flask, add 80g of γ-butyrolactone solvent, heat to 120°C, and stir until completely dissolved to obtain Solution A, standby;

[0042] (2) Put 3.572g of barbituric acid and 0.011g of azobisisobutyronitrile into another 250mL three-necked flask, add 14.29g of γ-butyrolactone solvent, and stir at room temperature for 30 minutes to obtain solution B for later use;

[0043] (3) adding the solution B to the solution A at one time, incubating and stirring at 120°C for 6 hours, and cooling to room temperature to obtain a wine red reaction solution;

[0044] (4) Add the reaction solution to 1300 g of ethanol, stir well until the product is completely precipitated, and obtain a light yellow suspension. After the solid is separated by centrifugation, the solid product is washed with ethanol, and then baked and dried at 80° C. for 24 hours , 19.34...

Embodiment 2

[0048] Bismaleimide polymers were prepared as follows:

[0049] (1) Put 20g of N,N'-(methylenediphenyl)bismaleimide into a 250mL three-necked flask, add 80g of γ-butyrolactone solvent, heat to 120°C, and stir until completely dissolved to obtain Solution A, standby;

[0050] (2) Put 3.572g of barbituric acid and 0.011g of benzoyl peroxide into another 250mL three-necked flask, add 14.29g of gamma-butyrolactone solvent, and stir at room temperature for 30 minutes to obtain solution B for later use;

[0051] (3) adding the solution B to the solution A at one time, incubating and stirring at 120°C for 6 hours, and cooling to room temperature to obtain a wine red reaction solution;

[0052] (4) Add the reaction solution to 1300 g of methanol, stir well until the product is completely precipitated, and obtain a light yellow suspension. After the solid is separated by centrifugation, the solid product is washed with methanol, and then baked and dried at 80° C. for 24 hours , 19.58...

Embodiment 3

[0054] Bismaleimide polymers were prepared as follows:

[0055] (1) Put 20g of N,N'-(1,3-phenylene)bismaleimide into a 250mL three-necked flask, add 80g of N-methylpyrrolidone, heat to 110°C, stir well until it dissolves completely, and get Solution A, standby;

[0056] (2) Put 3.572g of barbituric acid and 0.011g of benzoyl peroxide into another 250mL three-necked flask, add 14.29g of N-methylpyrrolidone, and stir at room temperature for 30 minutes to obtain solution B for later use;

[0057] (3) adding the solution B to the solution A at one time, incubating and stirring at 110°C for 6 hours, and cooling to room temperature to obtain a wine red reaction solution;

[0058] (4) The reaction solution is added to 1300g of ethanol, fully stirred until the product is completely precipitated to obtain a light yellow suspension, after the solid is separated by suction filtration, the solid product is washed with ethanol, and then baked and dried at 80°C for 24 After 1 hour, 18.87 ...

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 a bismaleimide polymer allowing long-term storage and a preparation method thereof. The bismaleimide polymer is solid; a bismaleimide monomer and barbituric acid or a derivative of the barbituric acid are taken as raw materials and have a polymerization reaction under the action of an oil-soluble initiator, and the bismaleimide polymer is obtained after separation and drying. The invention further provides a preparation method of the bismaleimide polymer. With the adoption of the preparation method, the free radical polymerization speed of the bismaleimide polymer can be increased, and the chemical structure of the bismaleimide polymer can be improved; the bismaleimide polymer can be sufficiently separated out with the introduction of a phase separation solvent, the solid bismaleimide polymer allowing long-term storage can be obtained after separation and drying, the storage cycle of the bismaleimide polymer is greatly prolonged, and the application mode and the application field of the bismaleimide polymer are widened.

Description

technical field [0001] The invention relates to the field of high molecular polymers, in particular to a long-term preservation bismaleimide polymer and a preparation method thereof. Background technique [0002] In recent years, bismaleimide polymers have been widely used in aviation, aerospace, machinery, electronics, In industrial fields such as advanced composite materials, resin matrix, high temperature resistant insulating materials and adhesives, etc. However, due to the high cross-linking density and strong molecular chain rigidity of the cured bismaleimide polymer, the polymer exhibits great brittleness, which seriously hinders the bismaleimide polymer from adapting to high technical requirements. It is a major obstacle to expand new application fields, so how to improve toughness has become one of the key technologies to determine the application and development of bismaleimide polymers. [0003] The uncured modified bismaleimide polymers provided by the prior ar...

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): C08G73/12
CPCC08G73/128
Inventor 刘宝卢世刚张海燕庞静周鼎李俊强王泽
Owner CHINA AUTOMOTIVE BATTERY RES INST CO LTD
Features
  • Generate Ideas
  • 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