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

Small-cell-size polymethacrylimide foam and production method thereof

A polymethacrylimide and methacrylic acid technology is applied in the field of small pore size polymethacrylimide foam and its preparation, and achieves the effects of good mechanical properties, excellent performance and strong binding force.

Active Publication Date: 2019-09-20
湖南兆恒材料科技有限公司
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of polymethacrylimide foam of small aperture and preparation method thereof, thus solve the aforementioned problems existing in the prior art

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
  • Small-cell-size polymethacrylimide foam and production method thereof
  • Small-cell-size polymethacrylimide foam and production method thereof
  • Small-cell-size polymethacrylimide foam and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0046] like figure 1 Shown, the preparation method of the small-pore polymethacrylimide foam provided by the invention comprises the steps:

[0047] Step 1, using methacrylic acid and methacrylonitrile as monomers in parts by weight, adding an initiator, a crosslinking agent, a foaming agent and other reagents, and mixing uniformly to obtain a mixed solution;

[0048] Step 2, pouring the mixed solution into a mold, and performing free radical polymerization in a temperature environment of 30°C to 50°C to obtain a pre-polymerized resin plate;

[0049] Step 3, subjecting the pre-polymerized resin board to pre-treatment, demoulding, and post-treatment to obtain a foamable resin board; wherein, the pre-treatment and post-treatment are carried out as follows: the pre-polymerized resin board is heated to 50-80°C and keep for 4-6h, then raise the temperature to 85-100°C and keep for 5-7h, then raise the temperature to 105-115°C and keep for 1.5-3.5h;

[0050] Step 4, heating and fo...

Embodiment 1

[0082] The following components are used in parts by weight: 20 parts of methacrylic acid, 50 parts of methacrylonitrile, 2 parts of acrylamide, 0.12 parts of initiator, 3 parts of crosslinking agent, 4.5 parts of foaming agent, 2 parts of nucleating agent, 0.8 parts of mold release agent, 1.2 parts of secondary auxiliary agent, wherein, initiator is the combination of dibenzoyl peroxide, lauryl peroxide, dicarbonate peroxide and tert-butyl peroxybenzoate, the four The mass ratio is 2:2:3.5:2.5, the crosslinking agent is tert-butyl methacrylate and magnesium methacrylate, and the mass ratio of the two is 40:1, and the blowing agent is formamide, tert-butyl alcohol , the combination of isopropanol, the mass ratio of the three is 9:6:1, and the secondary auxiliary agent is the mixture of aliphatic ester surfactant and anisole peroxide;

[0083] Adopt the following method to prepare small-pore polymethacrylimide foam:

[0084] First, mix the above components evenly according to ...

Embodiment 2

[0090] The following components are used in parts by weight: 120 parts of methacrylic acid, 80 parts of methacrylonitrile, 4 parts of N,N-dimethylacrylamide, 0.5 parts of initiator, 6 parts of crosslinking agent, and 12.5 parts of foaming agent , 5 parts of nucleating agent, 2 parts of release agent, 1.5 parts of secondary auxiliary agent, wherein, the initiator is dibenzoyl peroxide, lauryl peroxide, dicarbonate peroxide and tert-butyl peroxybenzoate The combination of esters, the mass ratio of the four is 2.5:2.5:4:1.5, the crosslinking agent is allyl acrylate and zinc methacrylate, and the mass ratio of the two is 15:1, and the foaming agent is formazan The combination of amide, tert-butanol and ethanol, the mass ratio of the three is 8:5:2, and the secondary auxiliary agent is a mixture of metal soap surfactant and benzoquinone;

[0091] Adopt the following method to prepare small-pore polymethacrylimide foam:

[0092] First, mix the above components evenly according to t...

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
pore sizeaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses small-cell-size polymethacrylimide foam and a production method thereof, and relates to the technical field of high-polymer materials. According to the small-cell-size polymethacrylimide foam and the production method thereof, by adopting a mixed foaming agent of a physical foaming agent and a chemical foaming agent, adjusting substances and a ratio of the mixed foaming agent and substances and a ratio of a cross-linking agent, and controlling the foaming speed, the size of cells and evenness of the cells, a polymethacrylimide foam product is obtained, wherein the size of over 95% of the cells is 10-60 [mu]m, moreover, the cell size is even, and the maximum cell size is not exceeding 120 [mu]m; and the small-cell-size foam product is low in rubber adsorbing amount, high in adhesion to skin, good in machinability, good in mechanical performance, good in high-temperature size and weight stability, and excellent in various performance, and the problems that according to polymethacrylimide foam products produced in the prior art, the cell size and evenness cannot be controlled, the high-temperature stability is insufficient, and the industrial requirements of a small-cell-size polymethacrylimide foam product cannot be met are solved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a small-pore polymethacrylimide foam and a preparation method thereof. Background technique [0002] Polymethacrylimide (PMI) foam is a lightweight, closed-cell rigid foam with excellent mechanical properties and heat resistance, good compatibility with other resins, and easy to machine The processing and heating process co-cure to form a composite sandwich structure, which is an ideal core material for high-performance sandwich structure composites. [0003] At present, the research on polymethacrylimide foam is mainly to change its properties, such as mechanical properties, heat resistance, heat distortion temperature, etc., by changing the formula and preparation method. [0004] However, there is no research on the cell state of polymethacrylimide foam, and in the actual application of PMI foam plastics in some industries, there are often strict requirements on the...

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): C08J9/10C08J9/14C08L33/24C08L33/26C08F220/48C08F220/06C08F220/56C08F220/18C08F220/54C08F220/40
CPCC08J9/104C08J9/142C08F220/06C08F220/48C08J2203/04C08J2203/12C08J2203/184C08J2333/24C08J2333/26C08F220/56C08F220/40
Inventor 郑乐马晓雄王书平谢俊杰
Owner 湖南兆恒材料科技有限公司
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