Fire retardant used for producing cable PVC sheath

A flame retardant and sheath technology, applied in the field of flame retardants, can solve the problems of reducing the use efficiency and the electrical conductivity of the cable, and achieve the effects of inhibiting combustion, flame retardant cable energization performance, and preventing degradation.

Inactive Publication Date: 2018-05-18
铜陵市远维线缆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] PVC as a sheath needs to be added with a certain amount of flame retardant in the production to improve its fire resistance and flame retardancy. However, due to the interaction between the PVC sheath and the wire core, the general nature of the flame retardant will cause damage to the cable. The electrical conductivity is reduced, which reduces the efficiency of use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A flame retardant for the production of cable PVC sheaths, which is made of the following components in parts by weight: 17 parts of hypophosphorous acid, 15 parts of triethylamine, 11 parts of tetramethyldivinyldisiloxane, m- 7 parts of phenylenediamine, 6 parts of triaryl phosphate, 3 parts of benzoyl peroxide, 2 parts of tetrahydrofuran, 0.3 part of nano silicon dioxide, 0.6 part of sodium silicate, 12 parts of deionized water, 15 parts of ethanol; its preparation The method includes the following steps:

[0017] (1) Add ethanol and tetrahydrofuran into a three-necked flask equipped with a stirrer and a condenser, start stirring, stir and mix for 20 minutes, then add m-phenylenediamine in three steps, react for 2 hours under nitrogen protection, and stand for 3 hours , add tetramethyldivinyldisiloxane dropwise under heating in a water bath at 70°C, add benzoyl peroxide to the reaction system at one time after the dropwise addition, and heat to reflux for 4 hours to o...

Embodiment 2

[0024] A flame retardant for the production of cable PVC sheaths, which is made of the following components in parts by weight: 18 parts of hypophosphorous acid, 15.5 parts of triethylamine, 12 parts of tetramethyldivinyldisiloxane, m- 8 parts of phenylenediamine, 7 parts of triaryl phosphate, 4 parts of benzoyl peroxide, 2.5 parts of tetrahydrofuran, 0.35 parts of nano silicon dioxide, 0.7 parts of sodium silicate, 13 parts of deionized water, 17 parts of ethanol; its preparation The method includes the following steps:

[0025] (1) Add ethanol and tetrahydrofuran into a three-necked flask equipped with a stirrer and a condenser, start stirring, stir and mix for 25 minutes, then add m-phenylenediamine in three steps, react for 2.5 hours under nitrogen protection, and stand for 3.5 hours , add tetramethyldivinyldisiloxane dropwise under heating in a water bath at 75°C, add benzoyl peroxide to the reaction system at one time after the dropwise addition, and heat to reflux for 5...

Embodiment 3

[0032] A flame retardant used in the production of cable PVC sheaths, which is made of the following components in parts by weight: 20 parts of hypophosphorous acid, 16 parts of triethylamine, 13 parts of tetramethyldivinyldisiloxane, m- 9 parts of phenylenediamine, 8 parts of triaryl phosphate, 5 parts of benzoyl peroxide, 3 parts of tetrahydrofuran, 0.4 part of nano silicon dioxide, 0.8 part of sodium silicate, 15 parts of deionized water, 20 parts of ethanol; its preparation The method includes the following steps:

[0033] (1) Add ethanol and tetrahydrofuran into a three-necked flask equipped with a stirrer and a condenser, start stirring, stir and mix for 30 minutes, then add m-phenylenediamine in three steps, react for 3 hours under nitrogen protection, and stand for 4 hours , add tetramethyldivinyldisiloxane dropwise under heating in a water bath at 80°C, add benzoyl peroxide to the reaction system at one time after the dropwise addition, and heat to reflux for 6 hours ...

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Abstract

The invention relates to the technical field of processing and production of cables, and discloses a fire retardant used for producing a cable PVC sheath. The phosphorus-containing group of the fire retardant can release some gas substances during a combustion process, and the gas product produced via pyrolysis contains a PO. free radical, which can capture a H. free radical and a HO. free radical, so that the concentration of active free radical including H. and HO. is greatly reduced during a combustion process, and the fire retardant has a combustion inhibition effect. The prepared fire retardant allows carbon abundant in phosphorus and silicon to be formed on the surface of PVC polymer, wherein the carbon takes a heat insulation and air isolation effect, can prevent inner polymer fromfurther degradation, and doesn't cause adverse effect on electrical property of cables. The fire retardant can retard fire and improves electric performance of cables.

Description

technical field [0001] The invention belongs to the technical field of cable production and processing, and in particular relates to a flame retardant used in the production of cable PVC sheaths. Background technique [0002] Polyvinyl chloride, referred to as PVC, is a thermoplastic resin polymerized by vinyl chloride under the action of an initiator. It is a homopolymer of vinyl chloride. Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins. PVC is a white powder with an amorphous structure and a small degree of branching. The molecular weight of industrially produced PVC is generally in the range of 50,000 to 120,000, with a large polydispersity, and the molecular weight increases with the decrease of the polymerization temperature; there is no fixed melting point, it starts to soften at 80-85°C, and becomes viscoelastic at 130°C , 160 ~ 180 ℃ began to change into a viscous flow state; good mechanical propertie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K9/04C08K9/00C08K3/36C08K5/523
CPCC08K3/36C08K5/523C08K9/00C08K9/04C08K2201/011C08L2201/02C08L2203/202C08L27/06
Inventor 汪兆根
Owner 铜陵市远维线缆有限公司
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