High-density microporous polyurethane foam and preparation method thereof

A polyurethane, high-density technology, applied in the field of polyurethane foam, can solve the problems of cell wall collapse, shortened service cycle, molecular chain breakage, etc., and achieve the effect of good buffering and excellent resilience

Active Publication Date: 2022-01-04
青岛卓英社科技股份有限公司
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the fact that the existing polyurethane foam often has low density or uneven density, and the cell wall collapses or the molecular chain is broken when used under the action of a relatively large impact force, resulting in poor resilience of polyurethane foam and long service life. shortening phenomenon, the purpose of the present invention is to provide a kind of high-density microcellular polyurethane foam and preparation method thereof

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
  • High-density microporous polyurethane foam and preparation method thereof
  • High-density microporous polyurethane foam and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of high-density microporous polyurethane foam, its preparation method, comprises the following steps:

[0046] Step 1, prepare methylene bisfurfurylamine:

[0047]a. Weigh furfurylamine and mix it with deionized water, put it under the condition of 0~5℃ and stir well, then add hydrochloric acid solution drop by drop and keep stirring, after complete dropwise addition, heat up to 20~28℃ to get the mixed solution A; Wherein, the concentration of hydrochloric acid solution is 4mol / L, and the mass ratio of furfurylamine and deionized water is 1:3, and the mass ratio of hydrochloric acid solution and furfurylamine is 1:0.5;

[0048] b. Add the aqueous solution of formaldehyde to the mixed liquid A drop by drop. After complete dropwise addition, stir and react at 20~28°C for 4~6h. After the reaction, add sodium hydroxide solution until the pH of the reaction solution is 9.5~ 10.5, then add toluene to extract and take the organic layer, wash the organic layer with puri...

Embodiment 2

[0057] A kind of high-density microporous polyurethane foam, its preparation method, comprises the following steps:

[0058] Step 1, prepare methylene bisfurfurylamine:

[0059] a. Weigh furfurylamine and mix it with deionized water, put it under the condition of 0~5℃ and stir well, then add hydrochloric acid solution drop by drop and keep stirring, after complete dropwise addition, heat up to 20~28℃ to get the mixed solution A; Wherein, the concentration of hydrochloric acid solution is 3mol / L, and the mass ratio of furfurylamine and deionized water is 1:2, and the mass ratio of hydrochloric acid solution and furfurylamine is 1:0.3;

[0060] b. Add the aqueous solution of formaldehyde to the mixed liquid A drop by drop. After complete dropwise addition, stir and react at 20~28°C for 4~6h. After the reaction, add sodium hydroxide solution until the pH of the reaction solution is 9.5~ 10.5, then add toluene to extract and take the organic layer, wash the organic layer with pur...

Embodiment 3

[0069] A kind of high-density microporous polyurethane foam, its preparation method, comprises the following steps:

[0070] Step 1, prepare methylene bisfurfurylamine:

[0071] a. Weigh furfurylamine and mix it with deionized water, put it under the condition of 0~5℃ and stir well, then add hydrochloric acid solution drop by drop and keep stirring, after complete dropwise addition, heat up to 20~28℃ to get the mixed solution A; Wherein, the concentration of hydrochloric acid solution is 5mol / L, and the mass ratio of furfurylamine and deionized water is 1:4, and the mass ratio of hydrochloric acid solution and furfurylamine is 1:0.6;

[0072] b. Add the aqueous solution of formaldehyde to the mixed liquid A drop by drop. After complete dropwise addition, stir and react at 20~28°C for 4~6h. After the reaction, add sodium hydroxide solution until the pH of the reaction solution is 9.5~ 10.5, then add toluene to extract and take the organic layer, wash the organic layer with pur...

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 discloses high-density microporous polyurethane foam and a preparation method thereof. The preparation method comprises the following steps: step 1, preparing methylene difurfuryl amine: preparing methylene difurfuryl amine from furfuryl amine under the action of a hydrochloric acid solution and an aqueous solution of formaldehyde; step 2, preparing succinic cyclic carbonate: preparing succinic cyclic carbonate from succinic acid and glycerol carbonate under the action of a first catalyst; step 3, preparing a non-isocyanate polyurethane prepolymer: carrying out reaction on succinic acid cyclic carbonate and methylene difurfuryl amine; and step 4, preparing high-density microporous polyurethane: carrying out a reaction on diisocyanate, the non-isocyanate polyurethane prepolymer and the polyester polyol. The microporous polyurethane foam prepared by the method not only has excellent compressibility, slow rebound resilience, moisture resistance and chemical resistance, but also has excellent rebound resilience, can bear larger force and long-time compression, has better buffering, sealing, filling and shockproof effects, and is suitable for preparation of most frame sealing, module protection, hardware support and the like.

Description

technical field [0001] The invention relates to the field of polyurethane foam, in particular to a high-density microporous polyurethane foam and a preparation method thereof. Background technique [0002] High-density polyurethane foam material has been widely used by electronic product manufacturers, and has established long-term cooperative relations with many domestic and foreign research and development institutions such as mobile phones, communication digital, LCD, etc., to provide customers with high-quality, cushioning, insulation, dustproof, waterproof , Shockproof, energy-absorbing, heat-insulating, sound-insulating, high-seal polyurethane foam material. At present, the polyurethane foam materials used in the electronic product industry are mainly polyurethane foam sheets, which play a role in functional fields such as frame sealing, module protection, hardware support, etc., and in view of the dexterity of electronic products, most of them will be compressed and u...

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): C08G18/64C08G18/12C08G18/32C08G18/66C08G71/04C08G101/00
CPCC08G18/6415C08G18/12C08G18/664C08G18/6655C08G71/04C08G2101/00C08G2110/0083C08G2350/00C08G18/3206C08G18/3275
Inventor 张钊琦苏云孙胜亮吕良刚梁国庆王恩辉
Owner 青岛卓英社科技股份有限公司
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