Composition for threads, threads with improved properties and application of threads

FIELD: chemistry; production methods of composition for thread coating.

SUBSTANCE: composition includes x) = 10-50 mass.% of polyethylene wax with melting temperature from 110 to 150°C, y) = 10-50 mass.% compound ether compositions of conjoint polymer produced from α-olefine containing from 10 to 24 carbon atoms and unsaturated dicarboxylic acid selected from maleinic acid, fumaric acid, itaconic acid and citraconic acid z) = 100-(x+y) mass.% of silicon oil composition with 100 to 100- MPa-c viscosity at 20°C. Threads, fibres or filaments produced by spinning, stretching and texturing, if necessary, are subject to treatment with the specified composition.

EFFECT: items are ensured with high resistance property.

17 cl, 2 tbl, 3 ex

 

The invention relates to a composition for yarns, fibers, filaments, which can be applied on these threads, fibers, filaments, to improve the properties of these yarns, fibers, filaments, in particular abrasion resistance. The invention relates also to method of obtaining these threads, fibers, filaments, as well as rope containing these threads, fibers, filaments, and to their use.

These ropes, cables, mooring lines are used in many fields, such as the area of the Navy, the area of mountaineering, etc. They can be used, for example, for mooring boats and ships, such as pleasure boats.

These ropes, cables, mooring lines are subjected to significant mechanical stress in their application, for example, due to the sea state, for operations with rope users, etc. for Example, mooring rope experiences a different voltage depending on sea state and vessel movement. This causes, in particular, the friction between the fibers of the rope, causing abrasion of the fibers. This leads to rapid wear of these ropes, cables and moorings, to a decrease in strength and, eventually, break.

That's why I try to increase the service life of these ropes, cables, moorings, in particular, improving the characteristics of resistance to abrasion of the fibers of these ropes, cables, moorings.

Composition for application to fibers intended for receiving a rope or cable, to reduce the abrasion of fibers known. It is sold by the company Goulston Technologies called Lurol NR-6025®.

The invention provides a composition that may be applied to yarns, fibers, filaments, for example, for use in rope or wire rope and strands, fibers, filaments according to the invention have very good abrasion resistance.

According to the first object, the invention relates to compositions that can be applied to the threads, fibers, filaments, containing the following components:

a) a polyolefin selected from the group consisting of polyethylene and polypropylene,

b) polyorganosiloxane,

c) ester copolymer derived from α-olefin containing from 10 to 24 carbon atoms, and unsaturated dicarboxylic acid.

According to the second object the invention relates to yarns, fibres or filaments treated with the composition according to the invention.

The third object of the invention relates to a method for producing these threads, fibers, filaments, comprising the following steps:

1) the spinning material constituting the thread

2) if necessary, stretch yarn,

3) if necessary, texturing yarn,

and the thread is treated with the above composition in the process.

The fourth object of the invention relates to a rope, the rope, Svatovo, p is obtained from the threads fibers, filaments according to the invention and to their use in devices for mooring or anchoring or in the field of mountaineering.

The composition according to the invention contains as component a) a polyolefin selected from the group consisting of polyethylene and polypropylene. A positive component (a) is a polyethylene wax. In particular, the polyethylene wax may be oxidized.

According to the private variant of the invention, the component (a) is a polyethylene wax having a melting point component from 110 to 150°C, component preferably from 120 to 150°C.

A positive component (a) is a polyethylene wax, whose viscosity at 150°C is from 1000 to 5000 MPa·C.

As component b) the composition contains polyorganosiloxane. Preferably component b) is a silicone oil whose viscosity at 20°C ranges from 100 to 1000 MPa·s Polyorganosiloxane may be, for example, polymethylsiloxanes or polymethylphenylsiloxane.

The composition according to the invention contains as component (c) ester copolymer derived from α-olefin containing from 10 to 24 carbon atoms, and unsaturated dicarboxylic acid.

Ester can be obtained by esterification of a copolymer derived from α-olefin, sideradougou 10 to 24 carbon atoms, and of the unsaturated dicarboxylic acid, using gidrauxilirovannogo connection. Ester can also be obtained by adding the monomer at the time of receipt of the above copolymer.

α-olefin used for obtaining the component (c)contains preferably from 12 to 18 carbon atoms. As the dicarboxylic acid, which can be used for obtaining the component (c)can be called maleic acid, fumaric acid, taconova acid and citraconate acid. The preferred dicarboxylic acid is selected from maleic acid and fumaric acid.

The viscosity of the copolymer measured at 40°C, favorably ranges from 100 to 1000 MPa·C, preferably from 250 to 400 MPa·C.

According to the private variant of the invention, the composition contains:

- x% = 10-50 wt.% component a) of the total weight of components a), b) and c) of the composition,

- y% = 10-50 wt.% component c) of the total weight of components a), b) and c) of the composition,

z% = 100-(x+y) wt.% component b) of the total weight of components a), b) and c) of the composition.

Positive x is from 20 to 40%, and y is from 20 to 40%.

The composition according to the invention can be obtained by any method known for the preparation of the composition.

Prior to the preparation of a composition component a) may be in the form of an emulsion. Upon receipt of the emulsion can is t be used as an emulsifier. As an example, the emulsifier can be called emulsifier consisting of fatty alcohol containing from 10 to 20 carbon atoms, with fatty alcohol is ethoxylated and contains from 2 to 10 ethoxylate units (EO).

Prior to the preparation of a composition component (b) may be in the form of an emulsion. The emulsion may be an emulsion of the type oil-in-water". Component b) is favorably 10 to 60 wt.% the weight of the emulsion. Upon receipt of the emulsion can be used emulsifier. As an example of a suitable emulsifier can be called a fatty alcohol containing from 10 to 20 carbon atoms, with fatty alcohol is ethoxylated and contains from 2 to 10 ethoxylate units (EO).

The composition according to the invention can be in the form of a solution, emulsion, dispersion in a liquid.

The composition may be, for example, in the form of a solution in an organic solvent.

The composition may also be in the form of an emulsion in the liquid, and the liquid is favorably with water. When the composition is in the form of an emulsion, to obtain compositions can be used emulsifiers.

When the composition is in the form of an emulsion in water, it usually contains the components a), b) and c), emulsifiers and water. Part of the song, which is not water usually contains from 10 to 70 wt.% components a), b) and c) and from 30 to 90 wt.% emulsifiers. The corresponding d is whether the components (a), b) and c) are the same as described above.

According to the private variant of the invention, in addition to components a), b) and c), the composition may also contain a sizing composition.

Sizing compositions suitable for the invention are all the classic sizing used in the field of spinning of polymers, in particular spinning of polyamide or polyester. Sizing compositions are usually oil or water emulsions.

The composition according to the invention may also contain, in addition to components a), b) and/or c) and, if necessary, a sizing composition, other components such as surfactants, antistatic agents, which are usually used in sizing compositions.

The second object of the invention relates to yarns, fibres, filaments treated with such a composition, as described above.

Yarns, fibers, filaments according to the invention can be natural, artificial and/or synthetic origin. They may also have several sources, for example, can be called filaments of polyamide and cotton.

Yarns, fibers, filaments according to the invention is favorably based on thermoplastic polymer. For example, as a thermoplastic (co)polymer suitable in the context of the invention, to name polyolefins, polyesters, polyalkylene, polyoxyalkylene, POLYHALOGENATED, polyalkylacrylate or terephthalate, polyphenyl or Polyphenylene, polyphenyleneoxides or sulfides, polyvinyl acetate, polyvinyl alcohols, polyvinylchloride, polyvinylidenechloride, polyvinylidene, polyamides, polyimides, polycarbonates, polysiloxanes, polymers of acrylic or methacrylic acid, polyacrylates or polymethacrylates, natural polymers such as cellulose and its derivatives, synthetic polymers, such as synthetic elastomers, or thermoplastic copolymers containing at least one monomer that is identical to any of the monomers included in the above-mentioned polymers, and mixtures and/or alloys of all of these (co)polymers.

As other preferred thermoplastic polymers according to the invention can be called a semicrystalline or amorphous polyamides, such as aliphatic polyamides, polyaromatics polyamides and, more General, linear polyamides obtained by polycondensation of dibasic saturated aliphatic or aromatic acid and a saturated aromatic or aliphatic primary diamine, polyamides obtained by condensation of a lactam and an amino acid, or a linear polyamides obtained by condensation of a mixture of these various monomers.

More precisely, these copolyamids can be, for example, polyhexamethylene dopamin, polyphthalamide obtained from terephthalic and/or isophthalic acid, such as the polyamide sold under the brand name AMODEL, copolyamids, obtained from adipic acid, diamine and caprolactam.

Favorably thermoplastic polymer is a complex polyester such as polyethylene terephthalate (PET), polypropyleneimine (PPT), polybutylene terephthalate (PBT), their copolymers and mixtures.

Even more preferably thermoplastic polymer is selected from the group of (co)polyamides containing: polyamide 6, polyamide 6.6, polyamide 4, polyamide 11, polyamide 12, polyamide 4-6, 6-10, 6-12, 6-36, 12-12, their copolymers and mixtures.

Yarns, fibers, filaments according to the invention can be based on a mixture of thermoplastic polymers or thermoplastic copolymers.

Yarns, fibers, filaments according to the invention can also contain additives, such as reinforcing fillers, flame retardant products, UV stabilizers, thermal stabilizers, matting compounds such as titanium dioxide, bioactive agents, etc.

The composition according to the invention, located on the surface of the filaments, favorably ranges from 1 to 5 wt.% from weight threads.

Global titer of the filaments according to the invention can be selected throughout the normal range of titles for threads, for example from 200 decitex to 3000 decitex. According to the private variant of the invention, neither the and, fibers, filaments according to the invention are the threads with the full title of 700 to 2500 decitex.

The titer of a single fiber for yarn according to the invention can be selected throughout the normal range of titles. Usually the titer of a single fiber is greater than or equal to 0.3 decitex. He usually less equivalent decitex diameter of 800 microns in the case of single-fibre threads of large diameter. According to the private variant of the invention, the yarns, fibres, filaments according to the invention are the threads that have the titer of a single fiber of 3 to 9 decitex.

The invention relates also to a method for yarns, fibers, filaments, comprising the following steps:

1) the spinning of the material constituting the thread

2) if necessary, stretch yarn,

3) if necessary, texturing yarn,

and the thread is treated with such a composition, as described above, in the implementation of the method.

Step 1) spinning is carried out by any method known to the expert.

When the filament material is a thermoplastic polymer, stage 1) is favorably stage spun from the polymer melt.

Yarns, fibers, filaments according to the invention can be subjected to extrusion. Thus, the filament can be stretched to the desired extent along the path of the spinning by any known method according to the orientation and ikonicheskim characteristics, wish to give them. They can also simply be pre-focused or focused when spinning in accordance with the final winding speed. They can be obtained directly or wound on rollers, to adjust the tension of the winding, if it will be useful or necessary. Step 2) can be carried out in conjunction with spinning or separately.

The speed of spinning is usually from 400 to 8000 m/min, favorably ranges from 600 to 5000 m/min, preferably ranges from 600 to 2000 m/min

Step 3) texturing may be performed by any method known to the expert.

The processing step may be performed before or after a possible stretching stage. The processing step may also be carried out before or after a possible phase 3) texturing.

The treatment can be conducted by conventional methods such as applying rollers or devices finishing filaments. Of the conventional methods can be specified as an example and without limitation, methods of handling bare fibers rollers, coating or spraying, wetting, method plyaski, and any methods used in the textile industry for the processing of synthetic fibres. This processing can be performed at different stages of production threads. It is, inter alia, l is any stages, where traditionally add grease. Thus, the additive can be applied from the bottom of the spinning machine before spinning. You can also in the case of methods, called "the fiberizing", apply a Supplement before, during or after the stages of drawing, texturing or drying, etc.

In certain cases, it may also be advantageous to expose the threads of the first pre-processing (preprocessing) by known methods known to the expert, in order to facilitate the adherence of the graft copolymer to the filament. In addition, you can also be provided before or after treatment according to the invention with other chemical or physical treatment of fibres, such as irradiation, and others.

Yarns, fibers, filaments treated with the composition according to the invention have very good abrasion resistance.

The fourth object of the invention relates to a rope, cable or svarcova containing, at least in part, threads, fibers, filaments according to the invention.

Rope, cable or sartov according to the invention can be used in devices for mooring or anchorage for boats, ships, floating docks, light pontoons, buoys for anchorage, navigation or radar buoys.

Indeed, threads, fibers, filaments according to the invention have increased resistance to abrasion, and ropes, these threads have mA the initial wear and long service life, in particular, when these ropes undergo repeated immersion in water.

Rope, cable or sartov according to the invention can be applied also in the field of mountaineering where ropes are under considerable stress. In lifting ropes threads, fibers, filaments according to the invention is favorably present in the middle of the rope, as opposed to the shell, which is usually in the form of a wire braid.

Yarns, fibers, filaments according to the invention can also be applied to networks such as fishing nets or safety nets. They can also be used for belts, such as belts.

Other details or advantages of the invention more clearly identified when considering the examples given below solely for the information.

Test the abrasion resistance of yarns, fibers, filaments

The standard used to measure the abrasion resistance of the yarns is ASTM D 6611-00. The standard conditions used in the test are as follows:

- the reeling ("interwrapping") threads on the tester: 3 turns (winding angle: 1080°),

the amplitude of the movement ("stroke - stroke) thread on the tester: 6 cm

- engine speed: 70 rpm,

the tension exerted on the thread under the action of weight: 445 CH.

The test was conducted in accordance with ukazaniya standard in dry and wet conditions, such as described in the standard. The test was also carried out in dry conditions standard after processing threads, simulating the rope, immersed in water, and then air-dried. This processing is described below.

Processing threads, simulating the rope, immersed in water, and then air-dried

The thread is immersed in distilled water at ambient temperature for 10 minutes, including 1 minute with shaking threads. Then the thread is placed on a cotton cloth and dried in air for 24 h at ambient temperature.

The method of measuring the amount of composition applied to the thread

The song, which filaments were extracted with petroleum ether, having a boiling point of from 30 to 50°C, device type Soxhlet. Extraction is cyclical, and the cycle duration is from 6 to 10 minutes. The duration of extraction is 1 hour. The ratio between the weight of the sample and the weight of the solvent is from 1/10 to 1/20. The weight of the sample is from 2 to 10,

EXAMPLES

Example 1

Thread polyamide 6 produced by the company Rhodia Industrial Yarns AG under article T371 (1400f210: 210 thread with full title 1400 decitex), roll out and handle by passing the filaments on a rotating roller (and the thread is perpendicular to the longitudinal axis of the roller), being the m roller partially immersed in a bath containing such a composition, as described below in table 1. The passage of the threads on the platen is carried out on the classic way. The full speed of the thread is 450 m/min, and the thread is held against the roller, and the guide makes the reciprocating movement in the direction of the longitudinal axis of the roller, in order to optimize the deposition of the composition on the threads.

Table 1
ExampleTrackThe number of songs that are on the thread, wt.%Dry conditions: time to rupture (min)Wet conditions: time to rupture (min)Dry conditions after treatment: time to rupture (min)
A comparativeno-2322
Comparative BComposition 12,923592394
1Composition 23,1413125631

Composition 1: emulsion in water containing 25 wt.% Lurol NR-6025®manufactured by Goulston Technologies.

Composition 2 (percentages expressed in weight of the total weight of the composition): emulsion containing:

9% oxy the new polyethylene wax (component a) with a melting point 140° C,

2.6% of emulsifier type fatty alcohol containing 13 carbon atoms, ethoxylated with 6 ethoxylate units (EO), and the emulsifier arises from the above emulsion of polyethylene wax to obtain a composition,

6.5% of silicone oil (component b)having a viscosity at 20°C 350 MPa·with the arising of the emulsion oil-in-water" of this silicone oil to obtain a composition, and the emulsion contains 10 wt.% emulsifier type ethoxylated fatty alcohol containing 13 carbon atoms, containing 6 ethoxylate units (EO),

9% of ester of the copolymer obtained from α-olefin and a mixture of maleic and fumaric acid, and the copolymer has a viscosity at 40°C 340 MPa·s, measured according to standard ASTM D-445,

9% of emulsifier type of hydrated castor oil containing from 5 to 30 ethoxylate units (EO),

9% of emulsifier type ethoxylated fatty amine containing from 6 to 20 carbon atoms containing 10 ethoxylate units (EO),

54,9% deionized water.

This emulsion before coating the thread diluted with distilled water in the ratio of 1/1.

The yarn treated according to the invention has very good abrasion resistance compared to the untreated yarn, or thread, processed according to the preceding level, the independence of the IMO, whether it is in dry conditions, wet conditions or dry conditions after treatment, simulating immersion of the rope into the water.

Examples 2 and 3

Thread made from polyamide 6 produced by the company Rhodia Industrial Yarns AG under article T771 for example 2 (1400f210: 210 fibers with full title 1400 decitex) and T 371 for example 3 (1880f280: 280 fibers with full title 1880 decitex), respectively, are treated by spraying on a thread of composition 3, as described below, using two devices finishing fibers arranged opposite each other. The full speed of the thread is equal to 425 m/min Then the thread is wound on a bobbin.

Table 2
ExampleTrackThe number of songs that are on the thread, wt.%Dry conditions: time to rupture (min)Dry conditions after treatment: time to rupture (min)
2Composition 32,4519*)894*)
3Composition 32,3431**)501**)
*) Average of 8 threads and 6 measurements on thread
**) Average of 5 threads and 6 measurements on thread

Composition 3 (percentage of the possession is expressed in weight of the total weight of the composition):

Emulsion containing:

- 5% of oxidized polyethylene wax (component a)) with a melting point 140°C,

- 1.3% of emulsifier type ethoxylated fatty alcohol containing 13 carbon atoms and 6 ethoxylate units (EO), and the emulsifier is taken from the above emulsion of polyethylene wax before receiving the composition,

and 3.4% silicone oil (component b)), with 20°C viscosity of 350 MPa·taken from the emulsion oil-in-water" of this silicone oil to prepare the composition, the emulsion contains 10 wt.% emulsifier type ethoxylated fatty alcohol containing 13 carbon atoms and 6 ethoxylate units (EO),

- 5% of ester of the copolymer obtained from α-olefin and a mixture of maleic and fumaric acid, and the copolymer has a viscosity at 40°C 340 MPa·s, measured according to standard ASTM D-445,

- 5.3% emulsifier type of hydrated castor oil containing from 5 to 30 ethoxylate units (EO),

- 5% of emulsifier type ethoxylated fatty amine containing from 6 to 20 carbon atoms containing 10 ethoxylate units (EO),

- 75% deionized water.

The yarn treated according to the invention has very good abrasion resistance compared to the untreated yarn, or thread, which is processed on the preceding level, the independent the independent, whether it is in dry conditions or in dry conditions after treatment, simulating immersion of the rope into the water.

1. Composition for improving the abrasion resistance of yarns, fibers or filaments, containing the following components:

a) x%=10-50 wt.% of the total weight of components a), b) and (C) of the composition of polyethylene wax with a melting point component from 110 to 150°C

- %=10-50 wt.% of the total weight of components a), b) and (C) the composition of ester copolymer derived from α-olefin containing from 10 to 24 carbon atoms, and unsaturated dicarboxylic acid selected from maleic acid, fumaric acid, basis of itaconic acid and tarakanovas acid,

C) - z%=100-(x+y) wt.% of the total weight of components a), b) and (C) the composition of the silicone oil with a viscosity at 20°With a factor of 100 to 1000 MPa·C.

2. The composition according to claim 1, characterized in that the polyethylene wax has a melting point of from 120 to 150°C.

3. The composition according to claim 1, wherein x is from 20 to 40%, and ranges from 20 to 40%.

4. The composition according to claim 1 or 3, characterized in that it further comprises a sizing composition.

5. The composition according to claim 1 or 3, characterized in that it is in the form of an emulsion in a liquid.

6. The composition according to claim 5, characterized in that the liquid is water.

7. Bat is, fibers or filaments on the basis of polyamide, characterized in that they are treated with a composition according to one of claims 1 to 6.

8. Yarns, fibers or filaments according to claim 7, characterized in that the composition on the surface of the thread, is from 1 to 5% by weight of the thread.

9. Yarns, fibers or filaments according to claim 7, characterized in that they are the threads with the full title, the components of from 700 to 2500 decitex.

10. Yarns, fibers or filaments according to claim 7, characterized in that they are the threads with the title single yarn comprising from 3 to 9 decitex.

11. The method of producing yarns, fibres or filaments according to one of claims 7 to 10, comprising the following steps: 1) spinning the material forming the thread 2) if necessary, stretch yarn, 3) if necessary, texturing yarn,

characterized in that the thread is treated with a composition according to any one of claims 1 to 6 during the implementation of the method.

12. The method according to claim 11, wherein step 1) is spinning the polymer from the melt.

13. The method according to claim 11 or 12, characterized in that the processing step is carried out after steps 2) and 3).

14. The method according to claim 11 or 12, characterized in that the processing step carried out before steps 2) and 3).

15. Rope, cable or sartov, characterized in that it contains at least the yarns, fibres or filaments according to one of claims 7 to 10 or filaments, fibers or filaments obtained way is one of 11-14.

16. The use of rope for 15 devices mooring or anchorage for boats, ships, floating docks, light pontoons, buoys for anchorage, navigation or radar buoys.

17. The use of rope for 15 in the field of mountaineering.



 

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FIELD: polymer materials.

SUBSTANCE: invention relates to manufacture of polymer materials and, in particular, micro- and nanofibers showing elevated strength and durability, which can be employed in a variety of technical fields, including their use in various filters. Composition of fine fiber having diameters between 0,001 and 2 μm contains addition or condensation polymer and aromatic-nature resinous additive with molecular weight 500 to 3000, which additive may be disposed on the surface of fiber. Preparation method comprises exposure of polymer solution to electric field to form accelerated solution strands. Subsequent vaporization of solvent provides formation of fine fiber. Fibers are collected on a substrate and subjected to heat treatment at temperature not superior to melting point of polymer. From thus obtained fiber, fine-fiber material is manufactured.

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31 cl, 21 dwg, 5 tbl, 18 ex

FIELD: polymer materials.

SUBSTANCE: invention relates to technology of fabrication and modification of man-made fibers and threads, in particular poly(vinylidene sulfide) threads, and can be used in chemical industry for manufacture of filter materials and in medicine as novel surgical threads and implants (endoprostheses) showing biological activity and thrombosis resistance. Thread made from poly(vinylidene sulfide) with carbine coating has diameter 0.10-0.15 mm, linear density from 13.81 to 31.09 tex, knot strength 621-640 MPa, and rupture strength 632-648 MPa. Knitted mesh is made from monofilament poly(vinylidene sulfide) thread and its structure is characterized by density 12-13 courses per 1 cm and contains loops from two thread systems with first system parameters: 6/7, 3/2, 4,5, 1/0, 3/2 and second system parameters: 1/0, 2/3, 1,0, 2/3, 1/0, 2/3. Method of manufacturing knitted mesh comprises making indicated knitted material from indicated thread with density 12-13 course/cm and two indicated thread systems, impregnating the mesh with dimethylsulfoxide or dimethylformamide during 1-4 h, and treating it with 15-17% n-butanol or n-propanol solution of potassium hydroxide. Optimal treatment time is 0.5 to 4 h.

EFFECT: improved physico-mechanical characteristics of articles, to which such properties as chemical stability, thrombosis resistance, biocompatibility, catalytic activity are imparted.

4 cl, 1 tbl, 48 ex

FIELD: polymers.

SUBSTANCE: invention relates to technology for preparing and modification of chemical fibers and threads, in particular, to polyvinylidene fluoride (PVDF) fibers and threads. Method for preparing thread with carbine cover involves preliminary impregnation of PVDF thread of diameter 0.07-0.90 mm with dimethylformamide or dimethylsulfoxide for 1-4 h and the following treatment with 15-17% potassium hydroxide solution in n-butanol or n-propanol medium at temperature 60-80°C. Optimal treatment time is 0.5-4 h. Invention provides simplifying technology in preparing PVDF thread with carbine cover of different diameter and possessing higher physical-mechanical indices, among them, unit strength based on simultaneous elimination of highly toxic and highly inflammable substances, using a single-component highly boiling solvent, decreasing the potassium hydroxide concentration and elimination the ultrasonic field using. Invention can be used chemical industry, in particular, in manufacturing filtering and fettling materials and in medicine as suture biocompatible surgery threads showing the enhanced resistance to thrombosis.

EFFECT: improved preparing method, enhanced and valuable properties of cover.

2 cl, 1 tbl, 41 ex

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1 tbl, 7 ex

FIELD: polymer materials.

SUBSTANCE: invention relates to manufacture of ion-exchange fibers with special properties, which can be used as sorbent or as a sorbent constituent for cleaning liquid media, largely natural and waste waters. Method consists in performing alkali hydrolysis of polyacrylonitrile fiber in presence of hydrazine at elevated temperature completed by treatment of fiber with active agent causing degradation of chromophore groups of fiber. Alternatively, ion-exchange fiber is manufactured via alkali hydrolysis of polyacrylonitrile fiber in presence of hydrazine at elevated temperature, hydrolysis reaction being effected in concentrated solution of salt of alkali metal with weak acid followed by treatment of fiber with active agent as above.

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18 cl, 5 tbl, 16 ex

FIELD: sorbents.

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2 cl, 1 tbl, 2 ex

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EFFECT: optimized manufacture conditions.

2 ex

The invention relates to methods for ion exchange fibers based on polyacrylonitrile (PAN) and its copolymers and can be used in the extraction of metal ions Hg and Cr precise water from industrial complex salt composition
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