Low-formaldehyde high-elasticity semi-hard melamine foam and preparation method thereof

A high-elasticity, semi-rigid technology, applied in the field of polymer foam materials, can solve the problems of large residual formaldehyde, inability to be widely used, and high powder drop rate, and achieve low formaldehyde residual, good application prospects, and low thermal conductivity. Effect

Active Publication Date: 2022-03-11
EAST CHINA UNIV OF SCI & TECH
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing low-formaldehyde high-elastic semi-rigid melamine foam in order to overcome the defects in the above-mentioned prior art. Melamine foam cannot be widely used due to high powder shedding rate, large residual formaldehyde and poor toughness

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
  • Low-formaldehyde high-elasticity semi-hard melamine foam and preparation method thereof
  • Low-formaldehyde high-elasticity semi-hard melamine foam and preparation method thereof
  • Low-formaldehyde high-elasticity semi-hard melamine foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing low formaldehyde, highly elastic melamine foam is as follows:

[0042]First, add 50g of water-based phenolic formaldehyde, 200g of paraformaldehyde, 320g of melamine and 200g of water into the reaction kettle, adjust the pH between 8-9, and keep it at 80°C for a period of time. After the solution is clarified, add 50g of polyacrylamide to react for 1 hour , and finally get the foamed prepolymer liquid.

[0043] By weight, 3 parts of OP-10 emulsifier, 8 parts of n-pentane foaming agent, 5 parts of formic acid curing agent, 2 parts of KH550 modifier and 100 parts of foaming prepolymer liquid are passed through a high-speed mixer at 3000r / min rotating speed Mix evenly, pour the mixed foaming liquid into a specific mold, foam by microwave, foaming time is 1min, microwave power is 800W, post-treatment at 140°C for 2h, and MF1 foam is obtained.

Embodiment 2

[0045] A method for preparing low formaldehyde, highly elastic melamine foam is as follows:

[0046] First, add 20g of polyvinyl alcohol, 250g of paraformaldehyde, 400g of melamine and 310g of water into the reactor, adjust the pH between 8-9, and keep it at 80°C for a period of time. After the solution is clarified, add 60g of acrylic acid emulsion to react for 1h , and finally get the foamed prepolymer liquid.

[0047] By weight, 3 parts of OP-10 emulsifier, 8 parts of n-pentane foaming agent, 8 parts of formic acid curing agent, 2 parts of KH560 modifier and 100 parts of foaming prepolymer liquid are passed through a high-speed mixer at a speed of 3000r / min Mix evenly, pour the mixed foaming solution into a specific mold, foam by microwave, the foaming time is 1min, the microwave power is 800W, and post-treatment at 160°C for 4h to obtain MF2 foam.

Embodiment 3

[0049] A method for preparing low formaldehyde, highly elastic melamine foam is as follows:

[0050] First, add 30g polyglycerin, 200g paraformaldehyde, 300g melamine and 220g water into the reaction kettle, adjust the pH between 8-9, keep it at 80°C for a period of time, after the solution is clarified, add 60g polyacrylamide to react for 1h , and finally get the foamed prepolymer liquid.

[0051] By weight, 3 parts of sodium dodecylbenzenesulfonate emulsifier, 8 parts of n-pentane blowing agent, 5 parts of formic acid curing agent, 2 parts of KH550 modifier and 100 parts of foaming prepolymer liquid are passed through high-speed mixer in Mix evenly at a speed of 3000r / min, pour the mixed foaming solution into a specific mold, and foam by microwave, the foaming time is 1min, the microwave power is 1000W, and post-treatment at 160°C for 2h to obtain MF3.

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
compressive strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to low-formaldehyde high-elasticity semi-hard melamine foam and a preparation method thereof.The preparation method comprises the steps that 1-10 parts of polyhydroxy compound, 15-35 parts of formaldehyde, 25-40 parts of melamine, 10-40 parts of water and 5-20 parts of flexibilizer are prepared to obtain block type foaming prepolymerization liquid; and adding an emulsifier, a foaming agent, a curing agent and a modifier to prepare the melamine foam by taking the foaming prepolymerization liquid as a main body. Compared with the prior art, the melamine foam disclosed by the invention has the advantages of intrinsic flame-retardant property, excellent heat resistance, excellent sound absorption property, excellent thermal insulation property and low formaldehyde content, so that the melamine foam has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of polymer foam materials, in particular to a semi-rigid foam with low formaldehyde and high elasticity prepared by using melamine and formaldehyde as raw materials and a preparation method thereof. Background technique [0002] Melamine formaldehyde foam, also known as melamine foam, is a polymer foam obtained by polymerizing melamine and formaldehyde and undergoing a certain foaming process. The inside of the melamine foam is a three-dimensional network structure. The melamine foam obtained by microwave foaming process has a high opening rate and good water absorption performance. When melamine foam burns, it will form a nitrogen protective layer. Therefore, melamine foam has intrinsic flame retardant properties, which makes melamine foam replace traditional polyethylene, polystyrene and other flame retardant materials to a large extent. Poor lather. [0003] At present, the market is divided into two ty...

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): C08J9/14C08G12/40C08G12/32C08L61/32
CPCC08G12/40C08G12/32C08J9/141C08J2203/14C08J2361/32
Inventor 余若冰贺国城
Owner EAST CHINA UNIV OF SCI & TECH
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