Electrically insulating composition

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

 

The invention relates to a cable technique, namely polymeric compositions based on plasticized polyvinyl chloride (PVC) with reduced Flammability, smoke in combustion conditions and corruption and hydrogen chloride during combustion, designed for isolation of inner and outer shells of cables, operating in conditions of high fire risk.

There are a large number of publications in part to improve the fire safety polyvinyl chloride compositions which impart incombustibility and reduce smoke generation during combustion plasticized PVC is used as flame retardants-demomodule combination of different fillers.

Known polymer composition comprising a suspension polyvinyl chloride, ester plasticizer, a lead stabilizer and the flame retardant-demomodel, including antimony trioxide, zinc oxide, boric acid, calcium carbonate trihydrate and aluminum oxide, are presented in the following ratio of components, parts by weight:

tr>
suspension PVC100
ester plasticizer45-60
lead stabilizer4-7
antimony trioxide6-12
zinc oxide1.5 to 2.5
boric acid0,1-1,0
calcium carbonate40-80
the trihydrate of alumina20-60
Aerosil3-5,the

(ed. St. USSR №1832700, CL. C08L, 27/06, 1996).

The composition is characterized by the following properties: CI 32-33, maximum smoke density in terms of burning and decay (Dpoppy), in the range 280-300. The disadvantage of this composition is not sufficiently high level fireproof properties.

The closest technical characteristics and the achieved effect to the proposed formulation is non-flammable insulating composition with low smoke emission, used for isolation and protective casings of electrical wires and cables, operating in conditions of high fire risk, containing parts by weight of:

suspension PVC100
ester plasticizer 35-65
lead stabilizer2-7
calcium carbonate5-45
the trihydrate of alumina20-100
antimony trioxide5-9
zinc oxide0,5-8
the zinc borate0,5-8
calcium stearate1-3
calcium chloride0.1 to 2
the calcium oxide0.1 to 2

(patent RF №2272330 class. NV 3/44, 2006).

The composition is characterized by the following properties: CI 38-40, maximum smoke density in the combustion conditions (Lpoppy), within 180-210. However, the level of Flammability of the composition is not high enough.

The task of the invention to provide an insulating composition, characterized by a high degree of Flammability and low smoke emission in combustion conditions and corruption.

The technical result is achieved in that the insulating composition comprising a suspension polyvinyl chloride, ester plasticizer SV is Novy stabilizer, the calcium carbonate trihydrate of aluminum oxide, antimony trioxide, calcium stearate, zinc oxide, zinc borate, characterized in that it further comprises promoterami fire retardant, boric acid, magnesium hydroxide, diphenylolpropane, the lubricant in the following ratio, parts by weight:

Suspension PVC100
Ester plasticizer40-70
Lead stabilizer3-9
Calcium carbonate20-70
The trihydrate of alumina
or magnesium hydroxide or a mixture in the ratio 1:130-100
Antimony trioxide4-8
Zinc oxide1-5
Calcium stearate1-3
Boric acid0.1 to 1.5
The zinc borate0,5-10
Promoterami fire retardant 0,5-20
The diphenylolpropane0,1-0,5
Grease0,1-0,5

The proposed composition comprises a suspension PVC-M according to GOST 14332-E. As ester plasticizer used dioctylphthalate (DOP), diisononylphthalate (DINP), dialkylphosphate (DUFF), triricinolein (TKF), dioctylsebacate (DOS), GOST 8728-88 or mixtures thereof. Lead stabilizer: trehosnovnoy sulfate lead (Tossa), dibasic phthalate lead (DFTS) TU 6-09-600-76, stearate lead by THE 6-09-17-320-96 or mixtures thereof. As prosteradlo flame retardant - tetrabromophthalate ether having a high antipyridoxine properties, molecular weight: UAH 706,1, bromine content: 45,1%. Formula: C24H34Br4O4

As lubricants in the inventive resin composition can be used: polyethylene wax with a melting point not higher than 100°C, oxidized polyethylene wax, stearic acid.

The compositions may also contain other additives target, for example, titanium dioxide, concentrates dyes, carbon black in the amount of 0.5-3 parts by weight etc.

The invention is illustrated by the following examples.

Example 1. In the mixer, heated to 90°C, load the dry ingredients: 100 ACC PVC M 100, The Tossa-4, borate zinc - 1, zinc oxide 2, boric acid - 0.5, antimony trioxide - 4, calcium stearate - 1, diphenylol-propane - 0,5, stearic acid and 0.1, stirred for 3-5 min, administered DOP 40 parts by weight, tetrabromophthalate ether 10, stirred for 20-25 min, then injected calcium carbonate, 40 parts by weight, magnesium hydroxide, 30 parts by weight of the trihydrate of aluminum oxide 30 parts by weight and stirred for another 7-10 minutes Obtained powder mixture is cooled to room temperature and roll at a temperature of 155-165°C for 5-10 minutes rolled PVC films pressed samples for testing at a temperature of 160-170°C for 3 min under a pressure of 120 kgf/cm2.

The oxygen index was determined according to GOST 12.1.044-89, maximum smoke density (Dmaxin terms of burning and decay is determined according to GOST 24632-81.

The composition and properties of the composition given in the table.

Examples 2-14. The preparation method similar to example 1. The compositions and properties shown in the table.

Example 15 on the prototype.

Table 1
The composition and properties of composition
Examples according to the invention, the composition, parts by weight
Components123456789101112131415 prototype
PVC-70100100100100100100100100100100100100100100100
The dioctylphthalate4050---50653070--- --65
Diisononylphthalate---4070----------
Dialkylphenols--70----10----40--
Triricinolein-----10--- -7025---
Dioctylsebacate---------70-35-40-
The Tossa4-379-65--3-4-5
LOFTS-6---3- -933--7(
Stearate lead---------3-53--
Calcium carbonate407020506030354555504570644845
Magnesium hydroxide30-10060 -80-55-45-30-85-
The trihydrate of alumina3040--70-90-1004555-65-10
Antimony trioxide457685,56,57.54,5578465
Zinc oxide2 314352,53,51,552,534,548
Boric acid0,50,10,311,50,750,21,310,81,50,60,91,3-
The zinc borate1635875,54,50,595107,5 8
Tetrabromophthalate ether108206152,55110,571412917-
Calcium stearate121,52,51,5232,5311,51123
The diphenylolpropane0,50,30,50,20,40,40,30,20,5 0,30,50,50,20,4-
Stearic acid0,1--0,2-0,5-0,4-0,15-0,4-0,35-
Polietileno wax-0,5--0,5-0,3-0,1-0,15-0,35--
CaC12----- ---------2
Properties
Oxygen index, %424143424341414342414342424340
The maximum optical density of smoke Dmax:.- when burning138141122144137149145136150146139135136133 180
- if corruption95988499921009794999596889287

1. Insulating composition with reduced Flammability, smoke in combustion conditions and corruption and hydrogen chloride during combustion, designed to isolate the inner and outer layers of wires and cables, operating in conditions of high fire risk, including suspension polyvinyl chloride, ester plasticizer, a lead stabilizer, calcium carbonate trihydrate of aluminum oxide, antimony trioxide, calcium stearate, zinc oxide, zinc borate, characterized in that it further comprises promoterami fire retardant, boric acid, magnesium hydroxide, diphenylolpropane, the lubricant in the following ratio, parts by weight:

Suspension PVC100
lineevery plasticizer 40-70
Lead stabilizer3-9
Calcium carbonate20-70
The trihydrate of alumina
or magnesium hydroxide or a mixture in the ratio 1:130-100
Antimony trioxide4-8
Zinc oxide1-5
Calcium stearate1-3
Boric acid0.1 to 1.5
The zinc borate0,5-10
Promoterami fire retardant0,5-20
The diphenylolpropane0,1-0,5
Grease0,1-0,5

2. Insulating composition according to claim 1, characterized in that as prosteradlo flame retardant contains tetrabromophthalate ether.



 

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1 tbl

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11 cl, 2 tbl, 14 ex

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

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SUBSTANCE: invention relates to the field of production of composite protective rubberised materials used for manufacturing protective clothes, and respiratory protection equipment for people, including self-rescuers, breathing bags of isolating gas masks. A composite material contains chlorosulphonated polyethylene, polychloropren, kaolin, titanium dioxide, a nanodisperse filling agent montmorillonite, modified with quaternary ammonium salts, chloroparaffin-470, antimony trioxide, decabromodiphenyl oxide, magnesium oxide, zinc oxide, thiuram D, captax, rosin, benzene and ethylacetate mixture and polyether or cotton-polyether, or viscose-polyamide.

EFFECT: material possesses higher strength with simultaneous protection against action of toxic and aggressive chemical substances and open fire.

1 tbl, 3 ex

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