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

Preparation method of flame retardant polymethacrylimide foam and product thereof

A polymethacrylimide and flame-retardant technology, which is applied in the field of preparation of flame-retardant high-performance polymethacrylimide materials and their parts, can solve the problem of small thickness of flame-retardant layer and peeling of parts Low strength, unable to meet the requirements and other problems, to achieve good flame retardant effect, high peel strength, and reduce the effect of impact

Active Publication Date: 2017-04-19
CASHEM ADVANCED MATERIALS HI TECH CO LTD ZHEJIANG
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there are many literature reports at home and abroad that the flame retardant requirements can be achieved through surface soaking and other treatment methods. The Chinese patent CN02273716.2 reports that wooden boards are soaked in flame retardants, and then made into composite parts to achieve flame retardant Inflammability effect, Chinese patent CN201520908133.9 reports that the foam is soaked in a flame retardant and then made into a composite material to achieve the purpose of flame retardancy. However, the thickness of the flame-retardant layer of the composite material described in these patents is small, and only the surface The first layer, because the flame retardant exists on the surface, the peeling strength of the part is low, so it can only be used in fields with low peeling performance requirements, and cannot meet the requirements for structural materials in rail transit, ships and other fields

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
  • Preparation method of flame retardant polymethacrylimide foam and product thereof
  • Preparation method of flame retardant polymethacrylimide foam and product thereof
  • Preparation method of flame retardant polymethacrylimide foam and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Preparation of pre-polymerized board: 44 parts by weight of methacrylic acid, 43 parts by weight of methacrylonitrile, 5 parts by weight of acrylamide monomer, 0.5 parts by weight of initiator, 5 parts by weight of foaming agent, and 0.1 part by weight of crosslinking agent as raw materials And carry out mixing and stirring to obtain a uniform mixed liquid, then carry out pre-polymerization at 42°C for 55 hours in a closed mold to obtain a transparent pre-polymerized block body, and then post-polymerize at 80°C for 70 hours.

[0050] Foaming: Then place the prepolymerized board in dimethyl propyl phosphonate and heat it to 140°C for 2 hours, heat it to 180°C for 2 hours, and cool it down to room temperature to get a flame retardant layer with a thickness of 10.5mm and a density of 155kg / m 3 flame retardant foam.

[0051] After the foam is peeled, the surface is rinsed and dried. The compressive strength of the obtained foam is 4.8MPa, and then it is combined with the b...

Embodiment 2

[0053] Preparation of pre-polymerized board: 44 parts by weight of methacrylic acid, 43 parts by weight of methacrylonitrile, 5 parts by weight of acrylamide monomer, 0.5 parts by weight of initiator, 5 parts by weight of foaming agent, and 0.1 part by weight of crosslinking agent as raw materials And carry out mixing and stirring to obtain a uniform mixed liquid, then carry out pre-polymerization at 42°C for 55 hours in a closed mold to obtain a transparent pre-polymerized block body, and then post-polymerize at 80°C for 70 hours.

[0054] Foaming: Then place the prepolymerized board in triethyl phosphate and heat it to 150°C for 2 hours, heat it to 185°C for 2 hours, and cool it down to room temperature to get a flame retardant layer with a thickness of 12mm and a density of 150kg / m 3 flame retardant foam.

[0055] After the foam is peeled, the surface is rinsed and dried. The compressive strength of the obtained foam is 4.5MPa, and then it is combined with the basalt skin b...

Embodiment 3

[0057] Preparation of pre-polymerized board: 44 parts by weight of methacrylic acid, 43 parts by weight of methacrylonitrile, 5 parts by weight of acrylamide monomer, 0.5 parts by weight of initiator, 5 parts by weight of foaming agent, and 0.1 part by weight of crosslinking agent as raw materials And carry out mixing and stirring to obtain a uniform mixed liquid, then carry out pre-polymerization at 42°C for 55 hours in a closed mold to obtain a transparent pre-polymerized block body, and then post-polymerize at 80°C for 70 hours.

[0058] Foaming: Then place the prepolymerized board in triethyl phosphate and heat it to 160°C for 2.5 hours, heat it to 190°C for 2 hours, and cool it down to room temperature to get a flame retardant layer with a thickness of 12mm and a density of 145kg / m 3 flame retardant foam.

[0059] After the foam is peeled, the surface is rinsed and dried. The compressive strength of the obtained foam is 4.2MPa, and then it is combined with the basalt sk...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of flame retardant polymethacrylimide foam and a product thereof. The preparation method comprises the following steps: (1) uniformly mixing (methyl)acrylic acid, (methyl)acrylonitrile, a third monomer, an initiator, a foaming agent and a cross-linking agent at room temperature to obtain a mixed solution, injecting the mixed solution into an enclosed container and carrying out prepolymerization so as to obtain a transparent prepolymer plate; and (2) placing the transparent prepolymer plate into a high-boiling-point liquid flame-retardant and carrying out foaming treatment, and cooling to room temperature so as to obtain the flame retardant polymethacrylimide(PMI) foam. By the method, the flame retardant PMI foam with a certain thickness of flame retardant layer can be efficiently prepared at low cost. The PMI foam is applicable to a core material with a sandwiched structure. Flame extension performance of a composite product can meet requirements of BS6853:1999 on various train floors, wallboards, top boards, etc. In addition, peel strength of the product is not reduced, and the product can be applied in fields of rail transit, ships, automobile, etc.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a preparation method of a flame-retardant high-performance polymethacrylimide material and its parts. Background technique [0002] In order to reduce the weight, more and more polymer materials are used in aerospace, wind power equipment, automobile manufacturing, rail transit and other fields. Once a fire occurs, toxic gases will be generated, and the heat and temperature generated by the combustion of polymer materials are large. , The burning speed is fast, and it is easy to cause incomplete combustion and produce a large amount of black smoke, which brings difficulties to fire fighting, escape, lifesaving and other work. On November 18, 1987, 31 people died (including 1 fire squadron leader) and a large number of people were injured (including 6 firefighters) at the King's Cross Station of the London Underground; On the evening of October 28, 1995, a fire broke ou...

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): C08F220/06C08F220/42C08F220/56C08F2/44C08K5/5333C08K3/36C08K5/521C08J9/04C08L33/02
CPCC08F2/44C08F220/06C08J9/04C08J2201/036C08J2333/02C08K3/36C08K5/521C08K5/5333C08F220/42C08F220/56
Inventor 范晓庆李克迪孟佳丽吴素萍
Owner CASHEM ADVANCED MATERIALS HI TECH CO LTD ZHEJIANG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com