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Expanded graphite flame-retardant fire-extinguishing material and preparation method thereof

A technology of expanded graphite and fire-extinguishing materials, which is applied in fire-retardant coatings, conductive coatings, epoxy resin coatings, etc., to improve the dispersion effect and prevent agglomeration.

Inactive Publication Date: 2018-11-23
HUIZHOU KINGBALI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, organic flame retardants have a good affinity. Brominated flame retardants occupy an absolute advantage in organic flame retardant systems. Although there are many "criticisms" on environmental protection issues, it has been difficult to be replaced by other flame retardant systems.

Method used

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  • Expanded graphite flame-retardant fire-extinguishing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Disperse 3 parts of coupling agent and 60 parts of thermal and conductive powder at high speed, and carry out surface treatment on the thermal and conductive powder. The coupling agent is evenly coated on the surface of the thermal and conductive powder, and the two are mixed to form a conductive filler, thereby enhancing the conductive filler. Compatibility when mixed with the subsequent resin matrix. Then put the conductive filler, 40 parts of organic resin, 2 parts of curing agent, 0.5 parts of expanded graphite and 2.5 parts of additives into a high-speed disperser to mix and disperse. The additives are dispersants and leveling agents. The dispersion time is 5 minutes. 800 rpm; vacuum degassing after dispersion to form conductive glue A. Calender or coat the conductive adhesive solution A on the substrate PET plastic, heat at 130°C for 20 minutes, bake and cross-link to solidify, and shape it into a sheet, coil or heterogeneous component.

Embodiment 2

[0030] Disperse 3 parts of coupling agent and 60 parts of thermal and conductive powder at high speed, and carry out surface treatment on the thermal and conductive powder. The coupling agent is evenly coated on the surface of the thermal and conductive powder, and the two are mixed to form a conductive filler, thereby enhancing the conductive filler. Compatibility when mixed with the subsequent resin matrix. Then put the conductive filler, 40 parts of organic resin, 2 parts of curing agent, 1 part of expanded graphite and 2.5 parts of additives into a high-speed disperser to mix and disperse. The additives are dispersants and leveling agents. The dispersion time is 5 minutes, and the dispersion speed 800 rpm; vacuum degassing after dispersion to form conductive glue B. Calender or coat the conductive adhesive solution B on the substrate PET plastic, heat at 130°C for 20 minutes, bake and cross-link to solidify, and shape it into a sheet, coil or heterogeneous component.

Embodiment 3

[0032] Disperse 3 parts of coupling agent and 60 parts of thermal and conductive powder at high speed, and carry out surface treatment on the thermal and conductive powder. The coupling agent is evenly coated on the surface of the thermal and conductive powder, and the two are mixed to form a conductive filler, thereby enhancing the conductive filler. Compatibility when mixed with the subsequent resin matrix. Then put conductive filler, 40 parts of organic resin, 2 parts of curing agent, 1.5 parts of expanded graphite and 2.5 parts of additives into a high-speed disperser to mix and disperse. The additives are dispersant and leveling agent. The dispersion time is 5 minutes, and the dispersion speed 800 rpm; vacuum degassing after dispersion to form conductive glue C. Calender or coat the conductive adhesive C on the substrate PET plastic, heat at 130°C for 20 minutes, bake, cross-link and solidify, and shape it into a sheet, coil or heterogeneous component.

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Abstract

The invention discloses an expanded graphite flame-retardant fire-extinguishing material and a preparation method thereof. The expanded graphite flame-retardant fire-extinguishing material is preparedfrom the following components in parts by weight: 5-40 parts of organic resin, 0.5-30 parts of expanded graphite powder, 10-80 parts of heat conducting and electric conducting powder, 1-10 parts of coupling agent, 0.5-5 parts of curing agent and 0.5-5 parts of auxiliary agent. The expanded graphite flame-retardant fire-extinguishing material utilizes that expanded graphite can be rapidly expandedunder heating at a high temperature, and the expansion multiple can be up to tens and thousands of times. The apparent volume of the expanded graphite can reach 250 ml or above after expansion, and alarge number of unique network-like microporous structures are formed inside. Then the graphite is compounded with an organic resin such as silicone resin to form a sheet, coiled material or irregular shaped member with flame-retardant self-extinguishing properties at a certain temperature; at the same time, high-speed dynamic vacuum mixing technology is used for accelerating system mixing, preventing agglomeration, and improving dispersion effect, sufficiently mixing the expanded graphite with the resin.

Description

technical field [0001] The invention belongs to the technical field of heat-conducting fireproof materials, and in particular relates to an expanded graphite flame-retardant fire-extinguishing material and a preparation method thereof. Background technique [0002] With the increasing development of electronic products, consumer electronic products are increasingly compressing their structural space. At the same time, with the innovation of hardware technology, the heating problem of electronic products has become a concern of designers and consumers. The heating problem affects the life of electronic products and the safety of consumers. [0003] The application of flame retardant materials has reduced the losses caused by fire in the fields of automobiles, electronics, transportation and aerospace. With the wide application of organic silicon functional materials in the fields of electronics and appliances, the demand for LEDs is rapidly increasing. Expansion, there are h...

Claims

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Application Information

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IPC IPC(8): C09D127/12C09D161/20C09D161/06C09D133/00C09D163/00C09D183/04C09D201/00C09D5/18C09D5/24C08J7/04C08L67/02
CPCC08J7/0427C08J2367/02C08K3/04C08K7/24C08K9/04C08K2003/0862C08K2003/222C08K2003/2227C08K2003/385C09D5/18C09D5/24C09D127/12C09D133/00C09D161/06C09D161/20C09D163/00C09D183/04C09D201/00
Inventor 张立强
Owner HUIZHOU KINGBALI TECH
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