Fireproof flame-retardant polyurethane foam material and preparation method thereof

A polyurethane foam, fire and flame retardant technology, applied in the field of organic materials, can solve the problems of inability to achieve fire prevention and heat insulation, and it is difficult to form a fireproof shell, and achieve the effects of suppressing heat release, increasing oxygen index, and improving fire resistance.

Pending Publication Date: 2022-04-26
UNIV OF SCI & TECH OF CHINA
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reasons are: 1) Polyurethane and some organic flame retardants evaporate or degrade at high temperature, making it difficult to form a stable fireproof shell
2) The charcoal layer formed by polyuretha

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
  • Fireproof flame-retardant polyurethane foam material and preparation method thereof
  • Fireproof flame-retardant polyurethane foam material and preparation method thereof
  • Fireproof flame-retardant polyurethane foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0055] The present invention further provides a method for preparing a fire retardant polyurethane foam described in the above technical scheme, comprising the following steps:

[0056] a) Polyether polyols, low melting point glass powder, starch, expandable graphite and water are mixed to obtain a mixture;

[0057] b) The mixture isocyanate is mixed with foam to give polyurethane foam.

[0058] Wherein, the polyether polyol, low melting point glass powder, starch, expandable graphite, water and isocyanate types and dosages are consistent with the above technical solution, and will not be repeated here.

[0059]About step a): In the present invention, the polyether polyol, low melting point glass powder, starch, expandable graphite and water are mixed in a manner without special restrictions, in accordance with the conventional mixing method well known to those skilled in the art will be mixed material can be mixed, such as stirring and mixing. The mixing sequence is preferably: ...

Example

[0066] Example 1 to 7 and the counter-proportional ratio 1 to 3: preparation of polyurethane foam material

[0067] At room temperature, the polyether polyol, low melting point glass powder, starch, expandable graphite and water are stirred and mixed to obtain the mixture. The mixture was mixed with isocyanate, and the foaming was held at room temperature for 2 hours to obtain a polyurethane foam material. Example 1 to 10 and the proportion of raw materials in a proportion of 1 to 3 is shown in Table 1. In addition, according to the GB / T 8333 standard, the vertical combustion level test of each sample is carried out, and the results are shown in Table 1.

[0068] Table 1 Example 1 to 10 and the raw material formula of the proportional ratio 1 to 3

[0069] Sample number Diisocyanate Polyether polyols Low melting point glass powder starch Expandable graphite water Example 1 (1#) 50 50 20 20 20 0.2 Counter-scale 1 (2#) 50 50 0 20 20 0.2 Example...

Example Embodiment

[0070] Example 8: Flame retardancy test

[0071] According to the GB / T 8333 standard, the vertical combustion level test of each sample is shown in Table 2. At the same time, the JF-3 oxygen index analyzer (Nanjing Jiangning Analytical Instrument Co., Ltd., China) was used to test the limiting oxygen index (LOI) of each sample according to the GB / T 2046 test standard, and the results were shown in Table 2.

[0072] Table 2 Example 1 to 10 and the flame retardancy of the sample in proportion 1 to 3

[0073]

[0074] It can be seen from the vertical combustion level test results in Table 2 that Example 1 to 7 and the symmetrical ratio 1 to 2 can reach the V-0 grade, showing good flame retardancy, while the proportion 3 (8#) does not reach the flame retardant grade in the standard, does not have flame retardancy, and proves that without the addition of expandable graphite, the flame retardancy of the material will be reduced.

[0075] The trend plot is drawn on the abscissa of the ...

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
Compressive strengthaaaaaaaaaa
Login to view more

Abstract

The invention provides fireproof flame-retardant polyurethane foam and a preparation method thereof. The fireproof flame-retardant polyurethane foam provided by the invention is prepared from the following raw materials in parts by mass: 40 to 60 parts of polyether polyol, 40 to 60 parts of isocyanate, 10 to 30 parts of low-melting-point glass powder, 10 to 30 parts of starch, 10 to 40 parts of expansible graphite and 0 to 0.5 part of water. The fireproof polyurethane foam is prepared by matching the polyether polyol, the isocyanate, the low-melting-point glass powder, the starch, the expandable graphite and the water according to a certain proportion, the polyether polyol and the isocyanate react to form polyurethane, and the combination of the low-melting-point glass powder, the starch and the expandable graphite has a synergistic effect on the fireproof performance of the polyurethane foam; the flame retardance of the material can also be improved, so that the material achieves excellent flame retardance and fireproof and fire-resistant performance.

Description

technical field [0001] The invention relates to the field of organic materials, in particular to a fire-proof and flame-retardant polyurethane foam and a preparation method thereof. Background technique [0002] Polyurethane (PU) foam is a porous material made by reacting polyols and isocyanates with blowing agents. Polyurethane foams are used in a wide range of applications in the construction, automotive and electronics industries, which require materials with excellent properties in various aspects, such as electrical / thermal insulation, water blocking and fire protection. In these scenarios where polyurethane foam is used, the fire safety requirements are very high. However, polyurethane foam is highly flammable because its porous structure allows oxygen to easily diffuse into the foam, speeding up the ignition process. [0003] Some phosphorus / nitrogen-containing flame retardants or inorganic filler flame retardants have been used in polyurethane foams, but reports an...

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): C08G18/48C08L75/08C08L3/02C08K3/40C08K3/04C08G101/00
CPCC08G18/4854C08L75/08C08G2101/00C08L2201/02C08L3/02C08K3/40C08K3/04
Inventor 刘和文岳子棋
Owner UNIV OF SCI & TECH OF CHINA
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