DOPO (9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) derivative grafted siloxane flame retardant reaction type cable material and preparation method thereof

A derivative, siloxane technology, used in plastic/resin/wax insulators, organic insulators, etc., can solve problems such as failure, flame retardant precipitation, influence, etc., to achieve enhanced hydrophobicity, lasting flame retardant effect, and improved thermal The effect of stability

Inactive Publication Date: 2017-08-08
ANHUI CHUNHUI INSTR CABLE GROUP
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AI Technical Summary

Problems solved by technology

[0005] The flame retardant modification of polyethylene mainly starts with the addition of flame retardants. From the perspective of the preparation process of silane cro

Method used

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Embodiment Construction

[0028] A DOPO derivative grafted siloxane flame retardant reactive cable material, its preparation first successfully synthesized KH-570-TiO by sol-gel combined with hydrothermal method 2 Particles, vinyl groups are introduced on the surface of nano-titanium dioxide particles; vinyltrimethoxysilane is used as raw material for hydrolysis and polycondensation reaction to obtain octavinyl cage silsesquioxane, and then nucleophilic addition reaction with DOPO will be obtained The DOPO derivatives are used as reactive flame retardants; then the flame retardants are combined with nano-TiO with double bonds by using peroxide as the initiator 2 Grafted to polyethylene molecular chains to obtain grafted pellets, and then cross-linked in hot water.

[0029] Specific steps are as follows:

[0030] (1) Silane coupling agent KH-570 modified nano-TiO 2 :

[0031] Mix tetrabutyl titanate, silane coupling agent KH-570, glacial acetic acid and absolute ethanol evenly at room temperature, an...

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Abstract

The invention discloses a DOPO (9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) derivative grafted siloxane flame retardant reaction type cable material, which is prepared through the steps that firstly, KH-570-TiO2 particles are successfully synthesized by a sol-gel combined hydrothermal method; vinyl groups are introduced on the surfaces of the nanometer titania particles; ethenyltrimethoxysilan is used as a raw material to take a hydrolytic polycondensation reaction to prepare octavinyl polyhedral oligomeric silsesquioxane; the octavinyl polyhedral oligomeric silsesquioxane and DOPO take a nucleophilic addition reaction; an obtained DOPO derivative is used as a reaction type flame retardant; then, the flame retardant and nanometer TiO2 with double bonds are grafted on a polyethylene molecular chain by using peroxide as an initiator to obtain grafted aggregates; then, cross-linking reaction is performed in hot water to obtain the cable material. The reaction type flame retardant is connected with a polymer matrix through chemical bonds, so that the problem of compatibility is avoided; the influence on the mechanical property of the cable material is little; in addition, the flame retardant effect is durable.

Description

technical field [0001] The invention relates to the field of polyethylene materials, in particular to a DOPO derivative grafted siloxane flame-retardant reactive cable material and a preparation method thereof. Background technique [0002] Polyethylene has excellent electrical insulation, low temperature resistance, easy molding processability and sufficient mechanical strength, etc. It is a good electrical insulation material and has been widely used as the main material for wire, cable insulation and sheathing materials. raw material. However, due to its low operating temperature and poor short-circuit resistance, it is not suitable for use in fields such as wires with high heat generation and power cables above 1kV, and its market has been greatly restricted. After a long period of exploration and research, a method for cross-linking and modifying polyethylene has been found, and a silane cross-linked polyethylene (SXPE) wire and cable insulation material with excellent...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L83/08C08K9/06C08K3/22C08K5/134C08G77/395C08G77/20H01B3/44
CPCC08L23/0815C08G77/045C08K2201/011C08L2201/02C08L2201/08C08L2203/202H01B3/441C08L83/08C08K9/06C08K2003/2241C08K5/1345
Inventor 沈必亮
Owner ANHUI CHUNHUI INSTR CABLE GROUP
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