CN103351509B - A kind of cable insulation compositions and preparation method thereof - Google Patents

Abstract

A cable insulation composition and a preparation method thereof, characterized in that it is made of the following raw materials in parts by weight: high-density polyethylene 50-55, antioxidant 1010 1-2, sepiolite powder 23-26, smoked sheet glue 2 -3. Nano clay brick slag powder 1-2, silicon carbide powder 1-2, vanadium diboride 3-4, zirconium diboride 2-3, p-tert-butylbenzoic acid 1-2, cellulose acetate 2- 3. Isocyanate 1-2, aluminum hydroxide powder 1-2, cis-1,4-polyisoprene rubber 12-14, zinc cyanurate 1-2, sepiolite powder 23-25, vermiculite powder 10-12 , lapis lazuli powder 4-6, accelerator M 3-4, anti-aging agent MB 1-2, anti-scorch agent CTP1-2, vinyl tris (β-methoxyethoxy) silane 3-4, vinyl propionate Esters 1-2, modified diatomaceous earth 6-8. The present invention uses cis-1,4-polyisoprene rubber to improve the brittleness of high-density polyethylene, improves the flexibility and toughness of cable materials, and adds silicon carbide powder, which can better improve its wear resistance and expand the cable capacity. The scope of use of materials.

Description

A kind of cable insulation composition and preparation method thereof

technical field

The invention belongs to the technical field of cable materials, and more specifically relates to a cable insulating composition and a preparation method thereof.

Background technique

Wire and cable materials are mainly made of resin materials, fillers, plasticizers, anti-aging agents, flame retardants, antioxidants, etc. The formula raw materials are mainly concentrated in some common ingredients, which leads to low technical indicators of cable materials or Problems such as high cost, such as low volume resistivity, high temperature resistance, low temperature resistance, flame retardancy, insulation, etc., cannot meet the requirements of cable manufacturers for higher electrical properties of insulating grade sheath materials.

Contents of the invention

The object of the present invention is to provide a cable insulating composition and a preparation method thereof.

The technical scheme adopted in the present invention is:

A cable insulation composition is characterized in that it is made of the following raw materials in parts by weight:

High-density polyethylene 50-55, antioxidant 1010 1-2, sepiolite powder 23-26, smoked sheet glue 2-3, nano-clay brick slag powder 1-2, silicon carbide powder 1-2, vanadium diboride 3-4, zirconium diboride 2-3, p-tert-butylbenzoic acid 1-2, cellulose acetate 2-3, isocyanate 1-2, aluminum hydroxide powder 1-2, cis-1,4-polyisocyanate Pentadiene rubber 12-14, zinc cyanurate 1-2, sepiolite powder 23-25, vermiculite powder 10-12, lapis lazuli powder 4-6, accelerator M 3-4, antioxidant MB 1-2, Anti-scorch agent CTP1-2, vinyl tris (β-methoxyethoxy) silane 3-4, vinyl propionate 1-2, modified diatomaceous earth 6-8.

Described modified diatomite is made by following method:

Put diatomite at 450-500°C for 3-4 hours, take it out, cool it, soak it in 10-12% hydrochloric acid solution for 1-2 hours, take it out, wash it with pure water, dry it and grind it into powder; Add aluminum nitride equivalent to 35-40% of diatomite weight, 2-3% calcium stearate, 2-3% zirconium fluoride, 3-4% alum powder, mix and grind for 30-40 minutes, Then spray triallyl isocyanurate equivalent to 12-15% of the weight of diatomaceous earth, and stir for 60-80 minutes at 12000-15000 rpm to obtain the product.

The preparation method of the cable insulation composition is characterized in that it comprises the following steps: mixing smoked sheet glue, nano-clay brick slag powder, silicon carbide powder, 4-polyisoprene rubber, zinc cyanurate, sepiolite powder, Mix p-tert-butylbenzoic acid and cellulose acetate at 70-80°C for 15-20 minutes to obtain mixture A; knead other materials at 110-130°C for 15-20 minutes to obtain mixture B; The mixture A and B are mixed, and after standing for 12-15 hours, they are mixed at 110-128°C for 5-8 minutes, and then sent to a twin-screw extruder to extrude and granulate at 120-150°C to obtain the cable material.

The present invention uses cis-1,4-polyisoprene rubber to improve the brittleness of high-density polyethylene, improves the flexibility and toughness of cable materials, and adds silicon carbide powder, which can better improve its wear resistance and expand the cable capacity. The scope of use of materials.

detailed description

A cable insulation composition, made of the following raw materials in parts by weight (kg):

High-density polyethylene 55, antioxidant 1010 2, sepiolite powder 26, smoked sheet glue 3, nano-clay brick slag powder 1, silicon carbide powder 2, vanadium diboride 4, zirconium diboride 3, p-tert-butyl Benzoic acid 1, cellulose acetate 3, isocyanate 1, aluminum hydroxide powder 2, cis-1,4-polyisoprene rubber 14, zinc cyanurate 2, sepiolite powder 23, vermiculite powder 12, lapis lazuli powder 6 , accelerator M 4, anti-aging agent MB 2, anti-scorch agent CTP 2, vinyl tris (β-methoxyethoxy) silane 3, vinyl propionate 1, modified diatomaceous earth 8.

Described modified diatomite is made by following method:

Put diatomite at 450-500°C for 3-4 hours, take it out, cool it, soak it in 10-12% hydrochloric acid solution for 1-2 hours, take it out, wash it with pure water, dry it and grind it into powder; Add aluminum nitride equivalent to 40% of the weight of diatomite, 3% calcium stearate, 3% zirconium fluoride, and 4% alum powder, mix and grind for 30-40 minutes, and then spray an equivalent amount of diatomite Triallyl isocyanurate with 15% soil weight is stirred at 12000-15000 rpm for 60-80 minutes to obtain the product.

The preparation method of the cable insulation composition comprises the following steps: adding smoked sheet glue, nano-clay brick slag powder, silicon carbide powder, 4-polyisoprene rubber, zinc cyanurate, sepiolite powder, p-tert-butylbenzoic acid 1. Mix cellulose acetate at 70-80°C for 15-20 minutes to obtain compound A; knead other materials at 110-130°C for 15-20 minutes to obtain compound B; mix compound A and B , after standing for 12-15 hours, mixing at 110-128°C for 5-8 minutes, and then feeding into a twin-screw extruder to extrude and granulate at 120-150°C to obtain the cable material.

Cable material performance of the present invention:

project unit Cable material of the present invention original tensile strength MPa not less than 15.00 Original elongation at break % not less than 460 Resistance to 158℃×168h after aging Breaking strength MPa not less than 13 elongation at break % not less than 440 Volume resistivity at 20°C Ω·m 1.0×1014 200℃ thermal stability time Min 60

Claims (2)

1. a cable insulation compositions, it is characterised in that be prepared by the raw materials in: high density polyethylene (HDPE) 50-55, Antioxidant 1010 1-2, sepiolite powder 23-26, smoke sheet rubber 2-3, nanoclay brick ground-slag end 1-2, silicon carbide powder 1-2, two boron Change vanadium 3-4, zirconium diboride 2-3, p-tert-butyl benzoic acid 1-2, cellulose acetate 2-3, isocyanates 1-2, aluminium hydrate powder 1- 2, cis-Isosorbide-5-Nitrae-polyisoprene rubber 12-14, cyanuric acid zinc 1-2, sepiolite powder 23-25, vermiculite power 10-12, celestite powder 4- 6, captax 3-4, antioxidant MB 1-2, anti-scorching agent CTP 1-2, vinyl three ('beta '-methoxy ethyoxyl) silane 3-4, propanoic acid Vinyl acetate 1-2, modification infusorial earth 6-8；

Described modification infusorial earth is prepared by following methods: kieselguhr is put into 450-500 DEG C and calcines 3-4 hour, take out, cold But, put in 10-12% hydrochloric acid solution and soak 1-2 hour, take out, clean with pure water, dry and be ground into powder；Add quite In the aluminium nitride of kieselguhr weight 35-40%, the calcium stearate of 2-3%, the Zirconium tetrafluoride. of 2-3%, the alum powder of 3-4%, mixing is ground Grind 30-40 minute, spray into the iso-cyanuric acid triallyl ester being equivalent to kieselguhr weight 12-15% the most again, at 12000- Stir 60-80 minute under 15000 revs/min, to obtain final product.

The preparation method of cable insulation compositions the most according to claim 1, it is characterised in that comprise the following steps: by cigarette Sheet glue, nanoclay brick ground-slag end, silicon carbide powder, cis-Isosorbide-5-Nitrae-polyisoprene rubber, cyanuric acid zinc, sepiolite powder, to uncle Butylbenzoic acid, cellulose acetate at 70-80 DEG C mixing 15-20 minute, obtain compound A；By other material at 110-130 At DEG C mixing 15-20 minute, obtain compound B；Compound A, B are mixed, after placing 12-15 hour, mixed at 110-128 DEG C Close 5-8 minute, then, send into double screw extruder cable insulation compositions at 120-150 DEG C described in extruding pelletization acquisition.