Polymethacrylimide foam with uniform pores and preparation method thereof

A technology of polymethacrylimide and foam, which is applied in the field of polymethacrylimide foam and its preparation, and can solve problems such as increased cost, insignificant effect, and complicated process

Active Publication Date: 2018-12-14
CASHEM ADVANCED MATERIALS HI TECH CO LTD ZHEJIANG
View PDF9 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of nucleating agents is a relatively common method. Nucleating agents are divided into two types: soluble and insoluble. Soluble nucleating agents generally have a solubility limit and cannot be added in large quantities, so the e

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of polymethacrylimide foam with uniform pores, comprising the steps of:

[0032] According to the number of parts by mass, 50 parts of acrylic acid, 50 parts of acrylonitrile, 5 parts of the third comonomer, 3 parts of initiator, 5 parts of blowing agent, 3 parts of crosslinking agent, 3 parts of nucleating agent, 3 parts of zinc copper Doped with high-temperature-resistant surfactants and mixed evenly, reacted in a water bath at 50°C for 200 hours, and then treated at 100°C for 50 hours to obtain a transparent prepolymer; treated the transparent prepolymer at 170°C for 3 hours, PMI foam was obtained after 3 hours of treatment.

[0033] Described zinc-copper-doped high-temperature-resistant surfactant is prepared according to the following scheme:

[0034] In terms of parts by mass, 43 parts of hydrogen-containing silicone oil, 0.5 parts of bicyclo[2.2.2]zinc-2-ene-2,3-dicarboxylic anhydride, 0.2 parts of ethylene dichloride bis(tetrahydroindene )...

Embodiment 2

[0042]A preparation method of polymethacrylimide foam with uniform pores, comprising the steps of:

[0043] According to the mass parts, 40 parts of acrylic acid, 40 parts of methacrylonitrile, 1 part of the third comonomer, 1 part of initiator, 1 part of foaming agent, 1 part of crosslinking agent, 1 part of nucleating agent, 1 part of Mix zinc-copper-doped high-temperature-resistant surfactants evenly, react in a water bath at 30°C for 30 hours, and then treat at 80°C for 10 hours to obtain a transparent prepolymer; treat the transparent prepolymer at 140°C for 1 hour, PMI foam was obtained after 1 hour of treatment at °C.

[0044] Described zinc-copper-doped high-temperature-resistant surfactant is prepared according to the following scheme:

[0045] In terms of parts by mass, 40 parts of hydrogen-containing silicone oil, 0.1 part of bicyclo[2.2.2]zinc-2-ene-2,3-dicarboxylic anhydride, 0.05 part of ethylene dichloride bis(tetrahydroindene )-based titanium, 2.3 parts of di...

Embodiment 3

[0053] A preparation method of polymethacrylimide foam with uniform pores, comprising the steps of:

[0054] According to the mass parts, 60 parts of methacrylic acid, 60 parts of methacrylonitrile, 10 parts of the third comonomer, 5 parts of initiator, 10 parts of blowing agent, 5 parts of crosslinking agent, 5 parts of nucleating agent, Mix 5 parts of zinc-copper-doped high-temperature-resistant surfactants evenly, react in a water bath at 80°C for 500 hours, and then treat at 130°C for 100 hours to obtain a transparent prepolymer; treat the transparent prepolymer at 190°C for 5 hours, PMI foam was obtained after 5 hours of treatment at 240°C.

[0055] Described zinc-copper-doped high-temperature-resistant surfactant is prepared according to the following scheme:

[0056] According to the number of parts by mass, 50 parts of hydrogen-containing silicone oil, 3 parts of bicyclo[2.2.2]zinc-2-ene-2,3-dicarboxylic anhydride, 0.5 parts of ethylene dichloride bis(tetrahydroindene...

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
Densityaaaaaaaaaa
Cell diameteraaaaaaaaaa
Heat distortion temperatureaaaaaaaaaa
Login to view more

Abstract

The invention relates to the field of new material preparation, and concretely relates to polymethacrylimide foam with uniform pores and a preparation method thereof and a product thereof. The methodis capable of mixing (methyl)acrylic acid, (methyl)acrylonitrile, a third comonomer, an initiator, a foaming agent, a crosslinking agent, a nucleating agent, and a zinc-copper-doped high temperature-resistant surfactant, and performing a reaction to obtain a transparent prepolymer; the transparent prepolymer is heat-treated, and the polymethacrylimide foam having uniform pores is obtained. The surfactant used in the method does not affect the reaction, so the original preparation process does not need to be changed, and the method is simple and convenient; different active agent amounts can beselected according to different foaming temperatures, or complex formulation is carried out, the surface tension during foaming can be regulated and controlled to prepare pore sizes with different sizes, and fine and uniform pores can be obtained; the introduction of atoms such as fluorine and silicon can increase the intermolecular force, and the heat resistance of the material can be increasedat a certain extent.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a polymethacrylimide foam with uniform pores and a preparation method thereof. Background technique [0002] Polymethacrylimide (PMI) foam is a light-weight, high-strength heat-resistant foam, generally used as the core material of sandwich structure composite materials, which can be cured with fibers, resins, prepregs, etc. , Molding, (high pressure) resin transfer molding and other processes. [0003] CN105085767A discloses a polyacrylimide foam material prepared by using an ester ammonium salt precursor, its preparation method and application. In the invention, during the preparation of polyacrylimide foam prepolymer, the ester ammonium salt precursor of PMR polyimide is added, and the endothermic reaction of amidation is used to prepare the polyacrylimide prepolymer The exothermic reaction of free radical polymerization in the process is matched to achieve the purpose of...

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): C08F220/06C08F220/46C08F220/56C08F220/40C08F220/14C08F2/24C08F2/30C08J9/04
CPCC08F2/24C08F2/30C08F220/06C08F220/46C08J9/04C08J2333/06C08F220/56C08F220/40C08F220/14
Inventor 徐文生孟佳丽李克迪常艺李锋范晓庆
Owner CASHEM ADVANCED MATERIALS HI TECH CO LTD ZHEJIANG
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