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Halogen-free flame-retardant heat-resistant cable material and preparation method thereof

A cable material and heat-resistant technology, applied in the field of flame-retardant materials, can solve the problems of easy hydrolysis and migration, poor compatibility, etc., and achieve the effects of improving large hygroscopicity, improving heat resistance, and improving overall performance

Pending Publication Date: 2022-04-05
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared cable material overcomes the disadvantages of poor compatibility between ordinary ammonium polyphosphate and resin matrix, and is easy to be hydrolyzed and migrated; due to the addition of silica, on the basis of improving the flame retardancy of the cable material, the cable material is further improved. heat resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Microencapsulation modification of ammonium polyphosphate (APP): step 1, add 20 g of silicon dioxide to 150 ml of absolute ethanol and 40 ml of deionized water, ultrasonicate for 10 min, then transfer to a three-necked flask, and then 40 g of silane coupling agent KH 550 was slowly added dropwise into a three-necked flask, heated to 75 °C and stirred for 24 h to obtain a silica (NH 2 -SiO 2 ); Step 2, add 10 g APP into a three-necked flask filled with ethanol, then heat to 90 °C, and add 48 g NH 2 -SiO 2 Add it into a three-necked flask, and react for 4 hours to obtain silicon dioxide-coated ammonium polyphosphate (NH 2 -SiO 2 -APP); step 3, add 25 g of polycaprolactone into a three-necked flask, dry at 120 °C for 24 h, mix with 12.8 g of 4,4-diphenylmethane diisocyanate, and heat to 85 °C for reaction , after 2 h of reaction, add 1,4 butanediol and NH 2 -SiO 2 -APP, after stirring evenly, put it in an oven at 120 ℃ to dry and solidify to obtain microencapsula...

Embodiment 2

[0023] (1) Microencapsulation modification of ammonium polyphosphate (APP): step 1, add 20 g of silicon dioxide to 150 ml of absolute ethanol and 40 ml of deionized water, ultrasonicate for 10 min, then transfer to a three-necked flask, and then 40 g of silane coupling agent KH 550 was slowly added dropwise into a three-necked flask, heated to 75 °C and stirred for 24 h to obtain a silica (NH 2 -SiO 2 ); Step 2, add 10 g APP into a three-necked flask filled with ethanol, then heat to 90 °C, and add 48 g NH 2 -SiO 2 Add it into a three-necked flask, and react for 4 hours to obtain silicon dioxide-coated ammonium polyphosphate (NH 2 -SiO 2 -APP); step 3, add 25 g of polycaprolactone into a three-necked flask, dry at 120 °C for 24 h, mix with 12.8 g of 4,4-diphenylmethane diisocyanate, and heat to 85 °C for reaction , after 2 h of reaction, add 1,4 butanediol and NH 2 -SiO 2 -APP, after stirring evenly, put it in an oven at 120 ℃ to dry and solidify to obtain microencapsula...

Embodiment 3

[0027] (1) Microencapsulation modification of ammonium polyphosphate (APP): step 1, add 20 g of silicon dioxide to 150 ml of absolute ethanol and 40 ml of deionized water, ultrasonically move it into a three-necked flask after 10 min, and then put 40 g of silane coupling agent KH 550 was slowly added dropwise into a three-necked flask, heated to 75 °C and stirred for 24 h to obtain a silica (NH 2 -SiO 2 ); Step 2, add 10 g APP into a three-necked flask filled with ethanol, then heat to 90 °C, and add 48 g NH 2 -SiO 2 Add it into a three-neck flask and react for 4 h to prepare silica-coated ammonium polyphosphate (NH 2 -SiO 2 -APP); step 3, add 25 g of polycaprolactone into a three-necked flask, dry at 120 °C for 24 h, mix with 12.8 g of 4,4-diphenylmethane diisocyanate, and heat to 85 °C for reaction , after 2 h of reaction, add 1,4 butanediol and NH 2 -SiO 2 -APP, after stirring evenly, put it in an oven at 120 ℃ to dry and solidify to obtain microencapsulated ammonium ...

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Abstract

The invention relates to a halogen-free flame-retardant heat-resistant cable material and a preparation method thereof, and the halogen-free flame-retardant heat-resistant cable material is characterized in that silicon dioxide and thermoplastic polyurethane are used as a shell, ammonium polyphosphate is used as a core, and the ammonium polyphosphate is subjected to microencapsulation modification by using an ion exchange reaction of the ammonium polyphosphate. Finally, ethylene-vinyl acetate copolymer and the flame retardant are mixed and formed, and the halogen-free flame-retardant heat-resistant cable material product with excellent performance is prepared. The prepared cable material overcomes the defects that common ammonium polyphosphate has poor compatibility with a resin matrix and is easy to hydrolyze and migrate; and due to the addition of silicon dioxide, the heat resistance of the cable material is further improved on the basis of improving the flame retardant property of the cable material.

Description

technical field [0001] The invention relates to the technical field of flame-retardant materials, in particular to a halogen-free flame-retardant and heat-resistant cable material and a preparation method thereof. Background technique [0002] In the development of the insulation layer and sheath material of wire and cable, the halogen flame retardant widely used in the early stage has the remarkable advantages of high flame retardant efficiency, less dosage and low price, but the halogen flame retardant will release Toxic gas, harmful to human body. Therefore, it is particularly important to develop a high-performance halogen-free flame-retardant and heat-resistant cable material. [0003] At present, the main way to prepare halogen-free flame-retardant and heat-resistant cable materials is to add inorganic flame retardants, such as aluminum hydroxide / magnesium hydroxide, ammonium polyphosphate, expanded graphite, etc. Chinese patent CN 110591213 A discloses a low-smoke d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L51/04C08K9/10C08K3/32C08K3/36C08K9/06C08K5/20H01B3/44
Inventor 李瑞海鄢瑞勤
Owner SICHUAN UNIV
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