Flame-retardant waterproof ointment incompatible with flame-retardant sheath material and used for filling cable

A technology of water-blocking ointment and flame-retardant sheath, which is applied to cables, insulated cables, conductors, etc., can solve the problems of cracking of flame-retardant sheath materials, decline of flame-retardant performance, hidden dangers of product safety, etc. The effect of extended shelf life and fast initial expansion

Inactive Publication Date: 2012-10-03
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of society, various types of flame-retardant cables are widely used, most of which are realized by filling some ointment in the cable core and covering the cable core with a flame-retardant sheath. The ointment and the flame retardant sheathing material have better compatibility, therefore, after a period of time, the flame retardant sheathing material will usually crack, causing product safety hazards
For this reason, people use materials with better compatibility with ointment, such as polyethylene to coat the cable core first, and then extrude the flame-retardant sheath material outside the polyethylene to achieve it. Although this method The problem is partially solved, but for the product, the flame retardant performance is obviously reduced; in addition, the bonding performance between the flame retardant sheath material and the polyethylene sheath is poor, so the product cannot pass the repeated bending and torsion test. , There will be delamination between the flame retardant sheath material and the polyethylene sheath, which greatly affects the performance of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A flame-retardant water-blocking ointment for cable filling that is incompatible with flame-retardant sheathing materials, characterized in that the raw material components and their weight percentages are: base oil 65%; oil stabilizer 4%; Antioxidant 1%; thickener 5%; flame retardant 5%; water blocking agent 15%; absorbent particles 5%; wherein, the base oil is polyol oleate; Styrene rubber; the antioxidant is antioxidant 1010; the thickener is octamethylcyclotetrasiloxane polymer; the flame retardant is aluminum hydroxide; the water blocking agent is sodium acrylic acid; The absorbent particles are a mixture composed of the following weight percentages: 25% vinyl acetate copolymer, 20% polyacrylonitrile, 30% polyacrylamide, modified polyethylene obtained by reacting polyvinyl alcohol and cyclic anhydride. Alcohol 25%.

Embodiment 2

[0030] A flame-retardant water-blocking ointment for cable filling that is incompatible with flame-retardant sheathing materials, characterized in that the raw material components and their weight percentages are: base oil 68%; oil stabilizer 6%; Antioxidant 1.5%; thickener 5%; flame retardant 6%; water blocking agent 7.5%; absorbent particles 6%; wherein, the base oil is polyol oleate; Styrene rubber; the antioxidant is antioxidant 1010; the thickener is octamethylcyclotetrasiloxane polymer; the flame retardant is aluminum hydroxide; the water blocking agent is sodium acrylic acid; The absorbent particles are a mixture composed of the following weight percentages: 25% vinyl acetate copolymer, 25% polyacrylonitrile, 25% polyacrylamide, modified polyethylene obtained by reacting polyvinyl alcohol and cyclic anhydride. Alcohol 25%.

Embodiment 3

[0032] A flame-retardant water-blocking ointment for cable filling that is incompatible with flame-retardant sheathing materials, characterized in that the raw material components and their weight percentages are: base oil 75%; oil stabilizer 8%; Antioxidant 2%; thickener 4%; flame retardant 3%; water blocking agent 3%; absorbent particles 5%; wherein, the base oil is polyol oleate; Styrene rubber; the antioxidant is antioxidant 1010; the thickener is octamethylcyclotetrasiloxane polymer; the flame retardant is aluminum hydroxide; the water blocking agent is sodium acrylic acid; The absorbent particles are a mixture composed of the following weight percentages: 20% vinyl acetate copolymer, 20% polyacrylonitrile, 30% polyacrylamide, modified polyethylene obtained by reacting polyvinyl alcohol and cyclic anhydride. Alcohol 30%.

[0033] Through repeated tests of the applicant, it is found that the present invention can be realized through the following schemes:

[0034] A flam...

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PUM

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Abstract

The invention relates to the technical field of chemical industry and particularly relates to a flame-retardant waterproof ointment incompatible with a flame-retardant sheath material and used for filling a cable. The waterproof ointment is characterized by comprising the following raw material components in percentage by weight: 65-75% of base oil, 4-8% of oil stabilizer, 1-2% of antioxidant, 3-8% of thickener, 3-8% of fire retardant, 3-15% of waterproofing agent and 5-10% of absorptive particles. Compared with the prior art, the flame-retardant waterproof ointment has the following advantages: the quality guarantee period of products is greatly prolonged, the initial water absorption speed is greatly quickened, the initial expansion speed is quicker; the dropping point of the products is higher, the cone penetration is greater, and the thixotropic property is better; and a photoelectric cable made from the flame-retardant waterproof ointment is longer in service life.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a flame-retardant water-blocking ointment used for filling flame-retardant cables. Background technique [0002] With the rapid development of the wire and cable industry, a large number of filling ointments are used. The domestic industry standard YD / T 837 stipulates a variety of filling ointments for cables. There are cold application types and hot application types, and they are also useful It is used to fill loose tubes of optical cables, and it is also used to fill wires and cables or optical fiber cables. [0003] With the rapid development of society, various types of flame-retardant cables are widely used, most of which are realized by filling some ointment in the cable core and covering the cable core with a flame-retardant sheath. The ointment in the flame retardant sheathing material has a better compatibility with the flame retardant sheathing material. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/295H01B7/288C08L83/04G02B6/44
Inventor 沈群华
Owner STATE GRID CORP OF CHINA
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