Electrically insulating polymer composition

FIELD: chemistry.

SUBSTANCE: electrically insulating composition contains suspended polyvinyl chloride, an ester plasticiser, a lead stabiliser, diphenylol propane, chalk, stearic acid, calcium stearate, epoxidated soya bean oil, magnesium hydroxide, ammonium polyphosphate, chlorinated paraffins, antimony trioxide, zinc oxide, boric acid and organoclay.

EFFECT: low level of smoke emission in burning and glowing conditions while maintaining the degree of incombustibility.

2 cl, 1 tbl

 

The invention relates to a cable technique, namely, composite polymeric materials based on plasticized polyvinyl chloride (PVC) with reduced Flammability, smoke in combustion conditions and corruption and designed for isolation of the inner and outer layers of wires and cables in terms of fire safety.

There are quite a large number of compounds, which when introduced into plasticized PVC compositions to reduce smoke and hydrogen chloride increase the Flammability of the composition. The introduction of significant quantities of such additives affects the physico-mechanical and operational characteristics of polymeric materials. Thus, the problem of creating fire-resistant and at the same time multimedia and emit small amounts of hydrogen chloride during combustion of PVC compositions are complex and urgent.

Known flame retardant composition for insulation, shell, wire and cable according to German patent No. 1519781 containing in parts by weight per 100 parts by weight of PVC: ester plasticizer 45-50, calcium carbonate 30-80, magnesium carbonate 40, alumina 20, antimony trioxide 5, Tossa 6 and calcium stearate 2. But the level of Flammability this composition is not high enough.

Also known insulating composition according to the patent of Russian Federation №2195729 containing polyvinyl chloride, ester, plastify the ATOR, lead stabilizer, chalk, trihydrate of aluminum oxide, antimony trioxide, zinc oxide, boric acid, BHT and diphenylolpropane in the following ratio of components, parts by weight:

polyvinyl chloride100
ester plasticizer40-80
lead stabilizer3-7
calcium carbonate30-500
the trihydrate of alumina10-100
antimony trioxide4-7,5
zinc oxide0,7-1,9
boric acid0,4-0,6
BHT0,1-0,6
the diphenylolpropane0,1-0,6

This composition meets the level of smoke in the combustion conditions, corruption and the allocation of hydrogen chloride during combustion, but it is not a high heat resistance, which reduces the resource of cable products and limits the scope of their application./p>

Most similar to that proposed by a combination of traits from those known is electrically insulating composition according to the patent of Russian Federation №2402085 containing, in parts by weight: suspension polyvinyl chloride 100, ester plasticizer 50-70, lead stabilizer 3-8, epoxidizing soybean oil 1-4, calcium carbonate 100-500, antimony trioxide 5-10, zinc oxide 0.5 to 5, boric acid 0.1 to 1.5, additives FR - 930 1,3,5-Tris-(2,3-dibromopropyl)-isocyanurate 0,5-10, zinc chloride is 0.01, diphenylolpropane of 0.1-0.5, polyethylene wax of 0.1-0.5.

The task consisted in the development of dielectric composition with a high degree of Flammability low smoke and hydrogen chloride during combustion and decay.

The technical result is achieved in that the polymer composition comprising a suspension polyvinyl chloride, ester plasticizer, a lead stabilizer, diphenylolpropane, filler, epoxydecane soybean oil, flame retardant, zinc oxide, boric acid, further comprises repairing system and stearic acid as the lubricant is calcium stearate as a flame retardant is magnesium hydroxide and ammonium polyphosphate as a repairing system - chlorinated paraffins, as a stabilizer, optionally, antimony trioxide and as modified filler Supplement is Ino organogeny in the following ratio of components, parts by weight of:

suspension PVC100
ester plasticizer47-50
lead stabilizer2-5
the diphenylolpropane0,08-0,09
chalk9-10
stearic acid0,08-0,09
calcium stearate1.5 to 2.5
epoxydecane soybean oil0,5-0,7
magnesium hydroxide14-15
ammonium polyphosphate7-9
chlorinated paraffins7-9
antimony trioxide5-8
zinc oxide1-3
boric acid0,1-1
organogen1-3

The composition comprises PVC suspension is arch PVC-WITH-M (GOST 14332-78); as the plasticizer di(2-ethylhexyl) phthalate (DOP), tricresylphosphate (TKF) GOST 5728-76; as a stabilizer rejonowy sulfate lead (Tossa) THE 6-09-4098-75; calcium stearate (Stsa) THE 6-14-722-76; antimony trioxide on THE 6-09-3267-84; calcium carbonate on THE 6-18-38-85; zinc oxide according to GOST 10262-73; boric acid according to GOST 18704-78; stearic acid according to GOST 9419-78; chlorinated paraffins (CP - 418 on THE 6-01-16-90; ammonium polyphosphate on THE 6-47-15-90, organogeny.

Organoclay is a product of modification of montmorillonite field Gurpegi Kabardino-Balkarian Republic kationoobmennuyu capacity of 95 mEq/100 g clay melamine, manufactured according to GOST 7579-76, in the amount of 10% by weight of montmorillonite

Can also be used other known chemical products in equivalent amounts.

Example: In working turbomeeting load in series, in amounts, provided the recipe (table 1), the suspension polyvinyl chloride, ester plasticizer, a lead stabilizer, diphenylolpropane, chalk, stearic acid, calcium stearate, epoxydecane soybean oil, magnesium hydroxide, ammonium polyphosphate, chlorinated paraffins, antimony trioxide, zinc oxide, boric acid and organogeny. After the temperature in turbometal reaches 100°C, the mixture is discharged into the cooler, where it is the OHL is confirmed to room temperature, then produce extruding and granulating the mixture in the extruder at a temperature of 130-165°C.

Samples for testing are prepared valcheva-forging method. Determine the limiting oxygen index (LOI) according to GOST 12.1.044-89 and maximum optical smoke density (DM) in terms of burning and decay according to GOST 24632-81, volume resistivity according to GOST 6433-71.

The composition according to the examples listed in table 1, the properties are shown in table 2.

5-10
Table 1
The composition of the polyvinyl chloride compositions (examples 1-5 according to the invention, 6 - prototype)
No.Component name123456
1.suspension PVC100100100100100100
2.ester plasticizer47,6 4848,3475050-70
3.lead stabilizer2,43,1454,83-8
4.the diphenylolpropane0,080,0850,090,0860,080,1-0,5
5.chalk10109,99,59,3100-500
6.stearic acid0,080,0850,090,0860,080
7.calcium stearate21,52,02 2,52,30
8.epoxydecane soybean oil0,70,560,6130,50,61-4
9.magnesium hydroxide1415of 14.2814,914,30
10.ammonium polyphosphate977,1488,10
11.chlorinated paraffins87,97,1498,70
12.antimony trioxide87,97,1498,7
13.zinc oxide2,922,14310,5-5
14.boric acid0,10,810,90,70.1 to 1.5
15.organogen21,92,852,72,650

Table 2
The properties of the polyvinyl chloride compositions (examples 1-5 according to the invention, 6 - prototype)
Name123456
KI3235363428-30
DM154165150155163150-165
volume resistivity6,1*10145.2 x 10141,4*10158,4*10143,4*1013-

As follows from the presented data, the proposed insulating composition has a higher value of oxygen index than the well-known, in equal numbers by level of smoke when burning and decay.

1. Polymer composition comprising a suspension polyvinyl chloride, ester plasticizer, a lead stabilizer, diphenylolpropane, filler, epoxydecane soybean oil, flame retardant, stearic acid, zinc oxide, boric acid, characterized in that it further comprises stearic acid as the lubricant is calcium stearate as a flame retardant is magnesium hydroxide and ammonium polyphosphate as a repairing system chlorinated paraffins, as a stabilizer additional antimony trioxide and as modified filler additionally organogeny in the following ratio of components, parts by weight:

suspension PVC100
ester plasticizer47-50
lead stabilizer2-5
the diphenylolpropane0,08-0,09
chalk9-10
stearic acid0,08-0,09
calcium stearate1.5 to 2.5
epoxydecane soybean oil0,5-0,7
magnesium hydroxide14-15
ammonium polyphosphate7-9
chlorinated paraffin7-9
antimony trioxide5-8
zinc oxide1-3
Bourne is acid 0,1-1
organogen1-3

2. Insulating composition according to claim 1, characterized in that the filler contains organogeny, which is a product of modification of montmorillonite field Gurpegi Kabardino-Balkarian Republic kationoobmennuyu capacity of 95 mEq/100 g clay melamine in the amount of 10% by weight of montmorillonite.



 

Same patents:

FIELD: electricity.

SUBSTANCE: electric insulating composition includes suspension polyvinyl chloride, ester plasticiser, diphenyl propane, lead stabiliser, stearic acid, lubricating material, epoxidated soya oil, chlorinated paraffin, magnesium hydroxide, ammonia polyphosphate and organic clay.

EFFECT: invention makes it possible to produce a composition with lower combustibility, low release of smoke and hydrogen chloride during combustion, and to increase value of physical and mechanical characteristics.

1 tbl, 6 ex

FIELD: electricity.

SUBSTANCE: electroconductive peroxide cross-linkable composition comprises, wt %: polyolefin 49-62, benzopropionic acid 3,5-bis(1,1-dimethylethyl)-4-hydroxy-2-[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropyl] hydrazide -0.05-0.20, tetra-bis-methylene-(3-(3,5-di-tret-butyl-4-hydroxyphenyl) propionate)-0.05-0.20, organic peroxide-0.2-1.9, electroconductive technical carbon with specific volume resistance p=10±6 Ohm*cm - 29-34, technical carbon with specific volume resistance p=5±3 Ohm*cm - 2.5-5, 4,4'-thiabis(6-tret-butyl-m-cresol) - 0.05-0.25, zinc stearate - 0.15-1.0, polyethylene wax - 3-9. The composition of the specified compound is not exposed to substantial thermal-oxidative ageing and premature cross-linking during superimposition, and items from it have smooth surface.

EFFECT: improved physical and mechanical properties of cable products made with application of the proposed composition, and its manufacturability and stability.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to electrical engineering, specifically to cable engineering and polymer compositions based on plasticised polyvinyl chloride (PVC) with low inflammability, release of smoke and hydrogen chloride during combustion, intended for insulating inner and outer sheaths of cables. The electrically insulating composition contains suspended polyvinyl chloride, an ester plasticiser - dioctyl phthalate, tricresyl phosphate, chalk, soot, a stabiliser - melanine, antipyrenes - magnesium hydroxide and ammonium polyphosphate, smoke absorber - chlorinated paraffins, lubricant agent - calcium stearate, antioxidant - diphenylol propane and filler - organoclay, which is a product of modifying montmorillonite from the Gerpegezh deposit of the Kabardino-Balkaria Republic with cation-exchange capacity of 95 mg-eq/100 g clay with urea, in amount of 10% of the mass of montmorillonite.

EFFECT: obtaining a composition characterised by high non-flammability and low release of smoke during combustion.

2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to cable engineering and specifically to polymer compositions based on plasticised polyvinyl chloride (PVC) with low inflammability and release of smoke in combustion and smouldering conditions and release of hydrogen chloride during combustion, meant for insulating inner and outer sheaths of wires and cables used in high fire hazard conditions. The electrically insulating composition contains suspension polyvinyl chloride, an ester plasticiser, a lead stabiliser, calcium carbonate, a trihydrate of aluminium oxide or magnesium hydroxide, antimony trioxide, calcium stearate, zinc oxide, zinc borate, a bromine-containing fire retardant, boric acid and diphenylol propane.

EFFECT: invention improves fire safety of wires and cables, reduces smoke-formation during smouldering or combustion and provides low inflammability.

1 tbl, 15 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a heterophase polypropylene resin, a method of producing such a polypropylene resin and use thereof in making articles, particularly as material for making insulation and semiconductor layers of power cables. The heterophase polypropylene resin contains a matrix phase of a propylene radom copolymer and a rubber phase of an ethylene-propylene copolymer dispersed in the matrix phase. The heterophase polypropylene resin is characterised by melt flow rate (2.16 kg, 230°C) from 1.0 to 100 g/10 min, determined according to ISO 1133, and a fraction which is soluble in p-xylene at 25°C (XCS fraction), which is present in the resin in amount of 28 to 50 wt % and has molecular weight distribution (Mw/Mn) from 1.0 to 4.0.

EFFECT: heterophase polypropylene resin has high softness, improved low-temperature impact characteristics and a high melting point.

14 cl, 3 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: composition contains the following in pts.wt: suspended polyvinyl chloride 100, ester plasticiser 40-60, tribasic lead sulphate 3-7, calcium stearate 1-3, calcium carbonate 5-7, trihydrate of aluminium oxide and/or magnesium hydroxide 20-80, antimony trioxide 2-9, zinc oxide 1-5, ionol 0.1-0.5, zinc borate 0.5-6, diphenylol propane 0.1-0.5 percalite F 100 - 0-5 metal-containing lubricant 0.5-10, wherein the metal-containing lubricant is obtained by reacting oleic or stearic acid with glycerol in molar ratio 1:1 in the presence of 0.5-2.0 wt % of the total reaction mass of zinc oxide or magnesium oxide or two-component mixture thereof, with weight ratio thereof of 0.25-1.0:0.25-1.0 at 130-160°C and holding for 4-5 hours. High melt fluidity of the disclosed composition makes easier its processing in high-speed extruders.

EFFECT: low coefficient of smoke formation, high degree of incombustibility, processability of the composition and improved outer appearance of a bundle of the cable plastic compound.

1 tbl, 1 ex

FIELD: electrical engineering.

SUBSTANCE: method for production of insulated HV direct current (DC) eclectic cable or HV direct current (DC) eclectic cable or HV direct current (DC) lead or HV junction involves the stages of a polymer-based insulation system production (21), the system including a stirred polymer composition (12). Further thermal treatment (25) of the polymer-based insulation system is performed until the outside surface of the polymer-based insulation system is coated (24) with a coating impermeable for the substance present in the polymer-based insulation system as evenly distributed. Thus the concentration of the substance in the polymer-based insulation system is levelled.

EFFECT: manufacture time reduction, electric strength enhancement and maintenance simplification.

19 cl, 4 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to cable engineering and can be used for insulation and sheathing of cables and wires used in high fire hazard conditions. The electrically insulating composition contains a polyvinyl chloride composition I 40-13 A and a fire-retarding agent in form of montmorillonite which is modified with 5-15% urea or melamine, and magnesium hydroxide.

EFFECT: high fire-resistance of the composition and low smoke emission in the high fire hazard zone.

1 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: electrically insulating composition contains I 40-13A PVC compound, an antipyrene in form of ammonium polyphosphate and organoclay which is a product of modifying montmorillonite with cation-exchange capacity of 95 mg-eq/100 g clay with melamine in amount of 10% of the mass of montmorillonite.

EFFECT: reduced inflammability, low smoke toxicity, low cost of plasticised polyvinyl chloride.

2 dwg, 1 tbl, 6 ex

FIELD: electricity.

SUBSTANCE: composition contains, in weight parts: interpolymer ethylene with vinyl acetate 25-30, polyethylene 5-10, combiner 3-5, magnesium hydroxide Mg(OH)2 25-30, calcium carbonate CaCO3 25-30, nanoclay 5-10, anti-oxidant 0.1-0.3.

EFFECT: increased strength and elongation at break, reduced combustibility and low toxicity due to absence of halogen compounds.

2 tbl

FIELD: chemistry.

SUBSTANCE: mixture contains a stabiliser containing at least one metal ion and 0.1-15 parts polyvinyl alcohol, having degree of polymerisation of less than 700 and degree of hydrolysis of 75-95 mol %, per 100 parts polyvinyl chloride as a stabiliser for thermoplastic treated mixtures. Components are mixed during the moulding process at temperature of 180-240°C.

EFFECT: high thermal stability of polyvinyl chloride mixtures and processability thereof.

7 cl, 1 tbl

FIELD: electricity.

SUBSTANCE: electric insulating composition includes suspension polyvinyl chloride, ester plasticiser, diphenyl propane, lead stabiliser, stearic acid, lubricating material, epoxidated soya oil, chlorinated paraffin, magnesium hydroxide, ammonia polyphosphate and organic clay.

EFFECT: invention makes it possible to produce a composition with lower combustibility, low release of smoke and hydrogen chloride during combustion, and to increase value of physical and mechanical characteristics.

1 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to production of coloured polyvinyl chloride-based compositions which are suitable for making articles by extrusion. Disclosed is production of an extrusion coloured polyvinyl chloride composition involving preliminary mixing in a separate container an organic pigment with a liquid organosilicon oligomer to obtain a modified organic pigment. A first mixer is preheated to 110-125°C. As the mixing device operates in the mixer, a polyvinyl chloride suspension is fed into the mixer, as well as the following target additives, successively: filler, tribasic lead sulphate (heat stabiliser) and then the rest of the target additives. The modified organic pigment is fed last. The mixture is mixed until temperature of 115-125°C is achieved. The obtained mixture is reloaded into a water-cooled second mixer and mixing is continued until temperature of the mixture reaches 40-45°C.

EFFECT: high colour fastness of the composition which is suitable for making shaped and linear articles for building purposes.

2 cl, 3 tbl, 22 ex

FIELD: chemistry.

SUBSTANCE: invention relates to electrical engineering, specifically to cable engineering and polymer compositions based on plasticised polyvinyl chloride (PVC) with low inflammability, release of smoke and hydrogen chloride during combustion, intended for insulating inner and outer sheaths of cables. The electrically insulating composition contains suspended polyvinyl chloride, an ester plasticiser - dioctyl phthalate, tricresyl phosphate, chalk, soot, a stabiliser - melanine, antipyrenes - magnesium hydroxide and ammonium polyphosphate, smoke absorber - chlorinated paraffins, lubricant agent - calcium stearate, antioxidant - diphenylol propane and filler - organoclay, which is a product of modifying montmorillonite from the Gerpegezh deposit of the Kabardino-Balkaria Republic with cation-exchange capacity of 95 mg-eq/100 g clay with urea, in amount of 10% of the mass of montmorillonite.

EFFECT: obtaining a composition characterised by high non-flammability and low release of smoke during combustion.

2 tbl

FIELD: chemistry.

SUBSTANCE: polyvinyl chloride composition is meant for making profiled-moulded structural articles used for external finishing of buildings and structures, primarily siding. The method of producing a polyvinyl chloride extrusion composition involves preliminary mixing in a separate vessel a basic heat stabiliser of tribasic lead sulphate with an additional heat stabiliser. Suspended polyvinyl chloride, filler, a mixture of the basic heat stabiliser and the additional heat stabiliser and target additives are successively fed into a first mixer heated to 110-125 °C, and stirred until reaching temperature of 115-125°C. The obtained mixture is transferred into a water-cooled mixer and mixing is continued until reaching temperature of 40-45°C.

EFFECT: method increases heat stability of the obtained composition.

2 cl, 3 tbl, 14 ex

FIELD: chemistry.

SUBSTANCE: wood-polymer composition consists of, wt %: wood-vegetable filler 70-90, thermoplastic polymer binder 8-25, a sodium salt of polyethylene polyaminomethylene phosphonic acid 0.5-1.0 and target additives - the balance. The thermoplastic polymer binder is selected from a group of vinyl polymers based on vinyl chloride or copolymes thereof with vinyl acetate, polymers based on ethylene, propylene, copolymers thereof, polymers based on methyl methacrylate, polyethylene terephthalate, polystyrene or mixture thereof.

EFFECT: invention improves strength properties of the composition, simplifies the composition and method for production thereof.

2 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to processing plastic, particularly polyvinyl chloride-based polymer compositions, which are used in various industries, including for making insulation and sheaths of wires and cables. The composition contains 100 pts.wt polyvinyl chloride, 40-80 pts.wt plasticiser, 3-15 pts.wt heat stabiliser and 0.1-8.0 pts.wt filler, which is chemically deposited calcium carbonate with surface treatment with fatty acids with particle size of 15-70 nm.

EFFECT: introduction of said filler into the polyvinyl chloride-based composition reduces viscosity of the molten composition and increases frost-resistance thereof while preserving physical and mechanical properties.

1 tbl, 25 ex

FIELD: chemistry.

SUBSTANCE: composition for insulation and sheaths of wires and cables contains polyvinyl chloride, a plasticiser, a heat stabiliser and pyrogenic silicon dioxide with particle size of 5-40 nm and specific surface area of 175-380 m2/g.

EFFECT: low viscosity of the molten composition, high frost-resistance, thermal stability and physical and mechanical properties.

1 tbl, 27 ex

FIELD: chemistry.

SUBSTANCE: invention relates to cable industry and specifically to electrically insulating compositions designed for insulation and sheaths of cables and wires, characterised by low emission of smoke and hydrogen chloride during combustion, used in conditions with high fire hazard. The polymer composition contains polyvinyl chloride, an ester plasticiser, a lead stabiliser and a fire-retardant and smoke-suppressant, which contains calcium carbonate, zinc oxide, aluminium oxide trihydrate, antimony trioxide and zinc borate. The composition additionally contains calcium stearate or lead stearate, boric acid, diphenylol propane, phosphorus-containing plasticiser, magnesium hydroxide, magnesium carbonate, calcium oxide or hydroxide, chlorinated polyethylene, organobromine compound, epoxy resin or epoxidated vegetable oil, dipentaerythritol or pentaerythritol. The stabiliser used can be nontoxic complex calcium-zinc heat stabilisers.

EFFECT: invention provides low smoke emission during smouldering and burning, while maintaining low flammability, improves processing of a PVC composition and outward appearance of a plastic compound, increases resistance to heat ageing, widens the range of PVC compositions used to make a cable compound.

2 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: polymer composition contains polyvinyl chloride, an ester plasticiser, a stabiliser, calcium carbonate, aluminium oxide trihydrate, antimony trioxide, zinc oxide, boric acid and diphenylol propane. The composition further contains calcium stearate or lead stearate, zinc borate, a phosphorus-containing plasticiser, magnesium hydroxide, magnesium carbonate, calcium oxide or hydroxide, an organobromine compound, a lubricant, and the stabiliser used can be nontoxic complex calcium-zinc heat stabilisers.

EFFECT: invention provides low smoke emission during smouldering and burning, while maintaining low flammability, improves processing of a PVC composition and outward appearance of a plastic compound, increases resistance to heat ageing, widens the range of PVC compositions used to make a cable compound.

2 cl, 1 tbl

FIELD: composite materials.

SUBSTANCE: invention discloses a method for manufacturing composite material for shielding-mediated protection against electromagnetic emission and can be used in electronics, in radio engineering, and also in a series of special-destination articles. In addition, material may be used for anechoic boxes and in various assemblies of technical devices and radio apparatuses. Method comprises mixing modified graphite-containing conducting filler and polymeric binder at weight ratio (50-80):(20-50). Once ingredients combined, mixture is additionally subjected to thermal expansion in thermal shock mode at 250-310оС and then molded. Polymeric binder is selected from polyolefins, polystyrene, fluoroplastic, polyvinylchloride paste and modified graphite is product obtained by modifying graphite with concentrated sulfuric and nitric acids. Material is characterized by that, in wavelength band from 2 to 5 cm at thickness of material up to 0.1 mm, transmission coefficient is decreased from -40 to -85 dB.

EFFECT: improved performance characteristics.

6 cl, 1 tbl, 2 ex

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