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Antiflaming plastic for cable and preparation method of plastic

A technology for flame-retardant plastics and cables, applied in plastic/resin/wax insulators, organic insulators, etc., and can solve problems such as difficulty in meeting high flame retardancy

Inactive Publication Date: 2014-10-08
WUHU JUNHE ELECTRIC WIRE & CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxygen index of the existing flame-retardant plastics for cables is around 30, which is difficult to meet the requirements of high flame retardancy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0010] The invention provides a method for preparing flame-retardant plastics for cables. The preparation method comprises polyvinyl chloride, polycarbonate, hexabromocyclododecane, zinc borate, chromium oxide, MBS resin, hydroxymethyl starch, Organic montmorillonite, nano-titanium dioxide, fillers, lubricants and plasticizers are mixed and extruded to obtain the flame-retardant plastic for cables; wherein, relative to 100 parts by weight of polyvinyl chloride, the polycarbonate The consumption of the said hexabromocyclododecane is 30-45 weight parts, the consumption of the said zinc borate is 2.5-4 weight parts, and the said chromium oxide consumption is 0.5-1.5 weight parts part, the consumption of the MBS resin is 7-12 parts by weight, the consumption of the hydroxymethyl starch is 3-5 parts by weight, the consumption of the organic montmorillonite is 9-15 parts by weight, the nano-titanium dioxide The dosage is 0.3-0.8 parts by weight, the dosage of the filler is 25-35 par...

Embodiment 1

[0021] Polyvinyl chloride 100kg, polycarbonate 40kg, hexabromocyclododecane 41kg, zinc borate 3.1kg, chromium oxide 1kg, MBS resin 9kg, hydroxymethyl starch 4kg, organic montmorillonite 13kg, nano titanium dioxide 0.6kg, carbonic acid 30kg of calcium, 3kg of stearic acid and 15kg of phthalate were first mixed for 8 minutes, and then extruded and granulated in a twin-screw extruder at a temperature of 140°C to obtain flame-retardant plastic A1 for cables. Among them, the degree of polymerization of polyvinyl chloride is 3500, the degree of polymerization of polycarbonate is 6000, the degree of polymerization of MBS resin is 3000, and the particle size of nano titanium dioxide is 5nm.

[0022] The flame-retardant plastic used for cables has a tensile strength of 15.5Mpa, an elongation at break of 250%, an oxygen index of 55, and a volume resistivity of 2.5×10 at 20°C. 11 Ω·m.

Embodiment 2

[0024] Polyvinyl chloride 100kg, polycarbonate 30kg, hexabromocyclododecane 30kg, zinc borate 2.5-4kg, chromium oxide 0.5kg, MBS resin 7kg, hydroxymethyl starch 3kg, organic montmorillonite 9kg, nano titanium dioxide 0.3kg , 25kg of calcium carbonate, 1kg of stearic acid and 13kg of phthalates were first mixed for 6 minutes, and then the temperature was set to 135°C in the twin-screw extrusion granulator for extrusion granulation to obtain flame-retardant plastic A2 for cables .

[0025] The flame-retardant plastic used for cables has a tensile strength of 15.1Mpa, an elongation at break of 246%, an oxygen index of 54, and a volume resistivity of 2.4×10 at 20°C. 11 Ω·m.

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Abstract

The invention discloses antiflaming plastic for a cable and a preparation method of the plastic. The preparation method comprises the following steps: mixing polyvinyl chloride, polycarbonate, hexabromocyclododecane, zinc borate, chromic oxide, MBS resin, hydroxymethyl starch, organic montmorillonite, nano titanium dioxide, filler, a lubricant and a plasticizer, then carrying out extrusion molding to prepare the antiflaming plastic for the cable, wherein the antiflaming plastic comprises the components in parts by weight: 100 parts of polyvinyl chloride, 30-45 parts of polycarbonate, 30-45 parts of hexabromocyclododecane, 2.5-4 parts of zinc borate, 0.5-1.5 parts of chromic oxide, 7-12 parts of MBS resin, 3-5 parts of hydroxymethyl starch, 9-15 parts of organic montmorillonite, 0.3-0.8 part of nano titanium dioxide, 25-35 parts of filler, 1-4 parts of lubricant and 13-17 parts of plasticizer. The plastic has excellent flame retardance, insulation performance and mechanical property.

Description

technical field [0001] The invention relates to the field of plastics, in particular to a flame-retardant plastic for cables and a preparation method thereof. Background technique [0002] Polyvinyl chloride plastic has good physical properties and is suitable as a low-voltage cable insulation material. Existing polyvinyl chloride plastics do not require high flame retardancy, but in some occasions, the flame retardancy of polyvinyl chloride plastic used as the insulating layer of cables is relatively high. The oxygen index is used to measure the flame retardancy of plastics, the higher the oxygen index, the better the flame retardancy. The oxygen index of the existing flame-retardant plastics for cables is around 30, which is difficult to meet the high flame-retardant requirements. Contents of the invention [0003] The object of the present invention is to provide a flame-retardant plastic for cables, which has an excellent oxygen index and excellent mechanical propert...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L69/00C08L3/08C08L51/04C08K13/02C08K5/02C08K3/38C08K3/22C08K3/34H01B3/44H01B3/30
Inventor 钱刚
Owner WUHU JUNHE ELECTRIC WIRE & CABLE
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