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Inorganic-filler-filled high-temperature-resistant foam material and preparation method thereof

A technology of foam materials and inorganic fillers, which is applied in the field of flame-retardant polymer foam materials and heat resistance, and can solve the problems of destroying the ozone layer of the atmosphere

Inactive Publication Date: 2019-04-02
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyurethane imide foam material of the present invention uses deionized water as a foaming agent to overcome the shortcomings of existing fluorine-containing foaming agents that destroy the atmospheric ozone layer and meet China's needs for environmental protection and sustainable development. It is environmentally friendly, non-toxic and non-flammable , the foaming process is simple, and the foaming ratio is controllable

Method used

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  • Inorganic-filler-filled high-temperature-resistant foam material and preparation method thereof
  • Inorganic-filler-filled high-temperature-resistant foam material and preparation method thereof
  • Inorganic-filler-filled high-temperature-resistant foam material and preparation method thereof

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Effect test

Embodiment 1

[0020] First, mix 30 parts of pyromellitic anhydride, 30 parts of dimethylformamide, 1 part of catalyst and 90 parts of isocyanate to obtain solution A. Put 17 parts of polyether polyol, 3 parts of water, 3 parts of silicone surfactant, and 5 parts of silicon carbide (about 2.4% of the whole) into the reaction vessel and stir at high speed to obtain solution B at a stirring speed of 2000r / min; The time is 2 minutes. Mix solution A and solution B and stir at high speed until uniform and free foaming. The stirring speed is 2000r / min. The stirring time was 30 seconds. The resulting material is placed in an oven for heat treatment. The heat treatment temperature is 250° C., and the heat treatment time is 2 hours to obtain a high temperature resistant composite foam filled with inorganic particles.

Embodiment 2

[0022] First, mix 30 parts of pyromellitic anhydride, 30 parts of dimethylformamide, 1 part of catalyst and 90 parts of isocyanate to obtain solution A. Put 17 parts of polyether polyol, 3 parts of water, 3 parts of silicone surfactant, and 10 parts of silicon carbide (about 4.8% of the whole) into a reaction vessel and stir at a high speed to obtain solution B. The stirring speed is 2000r / min and the stirring time is for 2 minutes. Mix solution A and solution B and stir at high speed until uniform and free foaming. The stirring speed is 2000r / min. The stirring time was 30 seconds. The resulting material is placed in an oven for heat treatment. The heat treatment temperature is 250° C., and the heat treatment time is 2 hours to obtain a high temperature resistant composite foam filled with inorganic particles.

Embodiment 3

[0024] First, mix 30 parts of pyromellitic anhydride, 30 parts of dimethylformamide, 1 part of catalyst and 90 parts of isocyanate to obtain solution A. Put 17 parts of polyether polyol, 3 parts of water, 3 parts of silicone surfactant, and 15 parts of silicon carbide (accounting for about 7.2% of the whole) into a reaction vessel and stir at high speed to obtain solution B at a stirring speed of 2000r / min; The time is 2 minutes. Mix solution A and solution B and stir at high speed until uniform and free foaming. The stirring speed is 2000r / min. The stirring time was 30 seconds. The resulting material is placed in an oven for heat treatment. The heat treatment temperature is 250° C., and the heat treatment time is 2 hours to obtain a high temperature resistant composite foam filled with inorganic particles.

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Abstract

The invention provides an inorganic-filler-filled high-temperature-resistant foam material and a preparation method thereof, and relates to the field of high-molecular foam materials. The inorganic-filler-filled high-temperature-resistant foam material is prepared from dianhydride, polyol and isocyanate. The preparation method comprises mixing inorganic particles (silicon carbide, expandable graphite, vermiculite, graphene oxide and the like) with a prepolymer for polymerizing, and performing heat treatment at the later stage. According to the method, deionized water is adopted as a foaming agent, the inorganic particles are used as high-temperature-resistant and flame-retardant phases, the obtained foam has high thermal stability and flame retardancy, and the dimensional stability is alsoimproved. The high-temperature-resistant foam material is filled with an inorganic filler, a fluorine-containing foaming agent and a toxic flame retardant are not used, and the foaming process is environment-friendly. Compared with other high-temperature-resistant foam, the deionized water as a foaming agent is environment-friendly, and the inorganic particles are used as a flame retardant are free of harmful gas, and the inorganic-filler-filled high-temperature-resistant foam material good in high temperature resistance, simple in forming method and wide in application and development prospect.

Description

1. Technical field: [0001] The invention relates to the field of heat-resistant and flame-retardant polymer foam materials, in particular to using inorganic particles as fillers to improve the heat-resistant and flame-retardant properties of polyurethane imide foam materials and a preparation method thereof. 2. Background technology: [0002] Polyurethane imide is a kind of chemical method to connect polyurethane and polyimide on the same main chain, so that the molecular main chain has both polyurethane and polyimide parts, in which the soft segment is the polyurethane part and the hard segment is the Polyimide part. Polyurethane is a polymer with relatively light weight, low thermal conductivity, high strength and good sound absorption effect, but low heat resistance and flammability. Polyimide is a semi-ladder aromatic heterocyclic polymer with an imide ring. From the perspective of structural flame retardancy, its molecular structure itself has excellent self-flame reta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/64C08G18/48C08G73/10C08K3/34C08K7/24C08G101/00
CPCC08G18/4081C08G18/48C08G18/6438C08G73/1035C08K3/34C08K7/24C08G2110/0083
Inventor 田华峰吴佳俐项爱民
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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