Insulating composition

 

(57) Abstract:

The invention relates to the cable industry, and in particular to compositions for the manufacture of insulation of different types of cables for electrical equipment, oil and other industries. Insulating composition based blockcopolymer ethylene and propylene content of ethylene units from 6 to 15% and complex additives contains the nucleator: titanium dioxide or calcium carbonate, or (1,3:2,4) dibenzylidene sorbitol, or (1,3:2,4)deparametrization sorbitol and additionally contains zinc stearate in the following ratio, wt.%: titanium dioxide, or calcium carbonate, or (1,3:2,4) dibenzylidene sorbitol, or (1,3:2,4)deparametrization sorbitol - 0.5 to 2.0, benzoylpropionic acid, 3,5-bis(1,1-gimeracil)-4-hydroxy-2, [3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl-]1-oxopropyl hydrazide-0,2-0,6, propionic acid, 3,3’-THIOBIS-,dioctadecyl ether - 0,2 - 0,6, benzoylpropionic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-,2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy]-methyl]-1,3-propanediylbis ether-0,2-0,6, phenol, 2,4-bis (1,1 dimethylethyl, postit(3:1)-0,2-0,6, stearate of zinc - 0,2-0,5, block copolymers of ethylene with propylene rest. Insulating the

The invention relates to the cable industry, and in particular to compositions for the manufacture of insulation of different types of cables for electrical equipment, oil and other industries.

Known insulating composition based on polyethylene (U.S. Pat. Of the Russian Federation No. 2127922, BI No. 8, 1999). However, it has poor resistance to thermal-oxidative aging.

Known composition for the insulation of electrical conductors (U.S. Pat. Of the Russian Federation No. 2112293, BI, No. 15, 1998), containing the copolymers of ethylene and propylene and additives. However, this composition is low-tech and has poor thermal stability when in contact with hydrocarbons.

Closest to the present invention is electrically insulating composition comprising a copolymer of ethylene and propylene content of ethylene units 8-15% and additives that provide "oven" properties at temperatures up to 140 C (U.S. Pat. No. 2166217, BI No. 12, 2001). However, its softening temperature by Vika and resistance to thermal-oxidative aging insufficient under conditions of elevated temperatures and in contact with the copper core, for example, in the operation of the cables for oil submersible pumps.

The objective of the invention is the creation insulating compositions thermal-oxidative aging in contact with copper ions.

The technical result is achieved in that the insulating composition comprises block copolymers of ethylene with propylene content of ethylene units from 6% to 15%, the nucleator: titanium dioxide, or calcium carbonate, or (1,3:2,4) dibenzylidene sorbitol, or (1,3:2,4)deparametrization sorbitol, complex additives and zinc stearate in the following content, wt.%:

Titanium dioxide or calcium carbonate, or (1,3:2,4) dibenzylidene sorbitol, or (1,3:2,4)deparametrization sorbitol - 0.5 to 2.0.

Benzoylpropionic acid, 3,5-bis(1,1-gimeracil)-4-hydroxy-2, [3-[3,5-bis(1,1 dimethylethyl)-4-hydroxyphenyl-]1-oxopropyl hydrazide - 0,2-0,6.

Propionic acid, 3,5’-THIOBIS-dioctadecyl ether - 0,2-0,6.

Benzoylpropionic acid, 3,5-bis (1,1-dimethylethyl)-4-hydroxy-, 2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy]-methyl]-1,3-propanediylbis ether-0,2-0,6.

Phenol, 2,4-bis (1,1-dimethylethyl,postit(3:1)-0,2-0,6.

Stearate of zinc - 0,2-0,5.

Block copolymers of ethylene with propylene - rest.

Titanium dioxide or calcium carbonate, or (1,3:2,4) dibenzylidene sorbitol, or (1,3:2,4)deparametrization sorbitol is a nucleator for the regulation of prosacea on the physico-chemical characteristics

Benzoylpropionic acid, 3,5-bis (1,1-gimeracil)-4-hydroxy-2, [3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl-]1-oxopropyl hydrazide increases the resistance of the composition to thermal-oxidative aging in the presence of copper ions.

Benzoylpropionic acid, 3,5-bis (1,1-dimethylethyl)-4-hydroxy-, 2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy]-methyl]-1,3-propanediylbis ether binds radicals and breaks the chain reaction.

Propionic acid, 3,3’-THIOBIS-,dioctadecyl ether antioxidant 2nd mechanism of action - decomposes peroxides that are formed by the action benzoylpropionic acid, 3,5-bis (1,1-dimethylethyl)-4-hydroxy-, 2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy]-methyl]-1,3-propanediylbis ether.

Phenol, 2,4-bis (1,1 dimethylethyl, postit (3:1) protects the composition during processing, binds peroxide formed during processing.

The zinc stearate is a plasticizer and at the same time neutralizes residues of the catalyst composition.

Examples of specific performance.

Example 1.

Take 96,5 kg blockcopolymers of ethylene with propylene content of ethylene units 8%, add

0,5 is ropel hydrazide,

0.5 kg benzoylpropionic acid, 3,5-bis (1,1-gimeracil)-4-hydroxy-2, [3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl-]1-oxopropyl hydrazide,

0.5 kg propionic acid, 3,3’-THIOBIS-dioctadecyl ether

0.5 kg of phenol, 2,4-bis (1,1-dimethylethyl-hospita

0.5 kg of zinc stearate,

1.0 kg of titanium dioxide

All components are mixed in a ribbon mixer and fed into feed hopper of twin screw extruder NR II-46.

The composition is prepared by mixing in an extruder at 190C. Get a composition with a softening temperature by Vika 150C, resistance to thermal-oxidative aging and thermal-oxidative stability in the presence of copper ions over 2500 hours.

Example 2.

Take 97,4 kg blockcopolymers of ethylene with propylene content of ethylene units 12%, add

0.4 kg benzoylpropionic acid, 3,5-bis (1,1-dimethylethyl)-4-hydroxy-,2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy]-methyl]-1,3-propanediylbis ether

0.5 kg benzoylpropionic acid, 3,5-bis (1,1-gimeracil)-4-hydroxy-2,[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl-]1-oxopropyl hydrazide,

0.3 kg propionic acid, 3,3’-THIOBIS-dioctadecyl the(1,3:2,4) deparametrization of sorbitol

All components are mixed in a ribbon mixer and fed into feed hopper of twin screw extruder NR II-46.

The composition is prepared by mixing in an extruder at 190C. Get a composition with a softening temperature by Vika S, resistance to thermal-oxidative aging and thermal-oxidative stability in the presence of copper ions over 2300 hours. The composition is obtained with a higher strength compared with the reference mark, and increased transparency.

Example 3. Take 96,4 kg blockcopolymers of ethylene with propylene content of ethylene units 12%, add

0.4 kg benzoylpropionic acid, 3,5-bis (1,1-dimethylethyl)-4-hydroxy-,2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy]-methyl]-1,3-propanediylbis ether

0.5 kg benzoylpropionic acid, 3,5-bis (1,1-gimeracil)-4-hydroxy-2,[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl-]1-oxopropyl hydrazide,

0.3 kg propionic acid, 3,3’-THIOBIS-dioctadecyl ether

0.2 kg of phenol, 2,4-bis (1,1-dimethylethyl-hospita

0.2 kg of zinc stearate,

2.0 kg (1,3:2,4) dibenzylidene of sorbitol

All components are mixed in a ribbon mixer and fed into feed hopper dvukhshagovoi with a softening temperature by Vika S, resistance to thermal-oxidative aging and thermal-oxidative stability in the presence of copper ions over 2400 hours. The composition is obtained with a higher strength compared with the reference mark and with increased transparency.

Example 4.

Take 97,3 kg blockcopolymers of ethylene with propylene content of ethylene units 12%, add

0.4 kg benzoylpropionic acid, 3,5-bis (1,1-dimethylethyl)-4-hydroxy-,2,2-bis[[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy]-methyl]-1,3-propanediylbis ether

0.5 kg benzoylpropionic acid, 3,5-bis (1,1-gimeracil)-4-hydroxy-2,[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl-]1-oxopropyl hydrazide,

0.5 kg propionic acid, 3,3’-THIOBIS-dioctadecyl ether

0.2 kg of phenol, 2,4-bis (1,1-dimethylethyl-hospita

0.2 kg of zinc stearate,

1.1 kg of calcium carbonate

All components are mixed in a ribbon mixer and fed into feed hopper of twin screw extruder NR II-46.

The composition is prepared by mixing in an extruder at 190C. Get a composition with a softening temperature by Vika S, resistance to thermal-oxidative aging and thermal-oxidative stability in prisutstvie the>

Thus, the proposed insulating composition provides resistance to thermal-oxidative aging and thermal-oxidative stability in the presence of copper ions over 2300 hours. In addition, the compositions have a high transparency, which allows you to visually monitor the location of the veins and to prevent the thickness of the insulation.

Insulating composition based blockcopolymer ethylene and propylene content of ethylene units from 6 to 15% and complex additives, characterized in that the composition contains the nucleator - titanium dioxide, or calcium carbonate, or (1,3:2,4)dibenzylidene sorbitol, or (1,3:2,4)deparametrization sorbitol and additionally contains zinc stearate in the following ratio, wt.%:

Titanium dioxide, or calcium carbonate

or (1,3:2,4) dibenzylidene sorbitol, or

(1,3:2,4)deparametrization sorbitol 0,5-2,0

Benzoylpropionic acid 3,5-bis(1,1-dimethylethyl)-4-hydroxy-2,[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl-]1-oxopropyl hydrazide (Irganox 1024) 0,2-0,6

Propionic acid, 3,3’-THIOBIS-

dioctadecyl ether (Irganox PS 802) 0,2-0,6

Benzoylpropionate KIS is opendiary ether of 0.2-0.6

Phenol 2,4-bis(1,1-dimethylethyl)-fosfat(3:1) 0,2-0,6

The zinc stearate and 0.2-0.5

Block copolymers of ethylene with propylene Else

 

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