Modifying composition for treating rubber wastes

FIELD: chemistry.

SUBSTANCE: modifying composition contains carbon-chain rubber, sulphur and quinol ether in the following ratio, pts. wt: rubber 100, sulphur 8-12, quinol ether 6-10. The modifying composition enables utilisation of rubber wastes of different composition. The product obtained using the modifying composition is used independently as a commercial-grade rubber mixture and as an additive to other rubber mixtures.

EFFECT: improved environmental friendliness due to utilisation of rubber wastes of different composition, wide range of modifiers for utilising rubber wastes.

6 tbl, 57 ex

 

The invention relates to the field of processing rubber waste generated in the production process, as well as in the processing of disused tyres and rubber products, in particular substances and chemical modifiers of the surface of the particle in the crumb rubber.

Known technical solutions for the utilization of recycled rubber products, rubber crumb. The process of regeneration of rubber involves the use of different methods or substances, leading to its degradation, softening and qualitative properties change. For this purpose chemical modifiers.

Known processing rubber crumb epoxydecane and gidroksilirovanii liquid diene polymer [Japan's bid No. 1-22962, CL C08L 75/04]. Also known and other chemical additives, modifiers, for example, a 50%solution of desulferization spun in oil [SU # 1016202, CL B29H 19/00], a mixture of rubrics, di-(2-benzothiazolyl)disulfide (altaxe) and a resinous waste phthalic anhydride [SU # 1130494, CL C08L 67/00, 1984].

A disadvantage of the known technical solutions is that when you use the listed modifiers observed low manufacturability vulkanizetas rubber compound (sticking to the walls of the equipment, the difficulty of the mixing, Nera is the principle of the distribution by volume of the mixture).

Known technical solutions, which are postcolonization rubber crumb by introducing vulcanizing mixture of sulfur in combination with additional ingredients. As such ingredients proposed N-cyclohexyl-2-benzothiazolyl-sulfenamid (centocor) [Soloviev ON the Production of tires, rubber and ATI, 1981, N12, C.11], 2-mercaptobenzothiazoles (captax), and as an active modifier ammonium stearate [U.S. Pat. RU # 2088609 C1], N-cyclohexyl-2-benzothiazolyl-sulfenamid [SU # 1678819, CL C08J 11/28].

The disadvantages of these technical solutions is due to the fact that in the case of the use of santour required to have extremely high concentrations of sulfur, comprising 24% compared to the rubber crumb (the content of santour - 0,74%). The lack of a rubber mixture comprising 2-mercaptobenzothiazoles (captax), and as an active modifier stearate ammonium is relatively low tensile strength of vulcanizates: mechanical characteristics of the obtained materials is strongly dependent on nature rubber, included in the composition of the rubber crumb. The use for the modification of rubber crumb N-cyclohexyl-2 - benzothiazolyl-sulfenamide requires additional heat treatment of the mixture for 50 minutes at 260°C.

The closest to the essence of the invention is the use of a modifier regeneration of rubber wastes containing long carbon chains is aucoc, vulcanizing system consisting of organic peroxides, thiazole, sulfenamide, zinc oxide, stearic acid and rosin [Patent RU No. 2121484 C1] (prototype).

The use of this modifier composition is difficult due to insufficient strength of the vulcanizates: technological and mechanical characteristics of the obtained materials is strongly dependent on nature rubber, included in the composition of the modifier, the composition and size of the rubber crumb.

The use of crushed waste rubber industry rubber crumb is the actual problem, as it allows to solve technological, economic, and environmental problems.

The technical result of the proposed solution is the improvement of physico-mechanical properties of vulcanizates with rubber crumb of different composition, the expansion of the range of modifiers recycling rubber waste, the use of shredded rubber waste.

This technical result is achieved by the fact that the modifier composition for the regeneration of rubber waste, including chain rubber, enter henology ester EH-1 (TU 6-09-513-76), sulfur, with the following content of components, parts by weight:

Chain rubber100
6-10
Sulfur8-12

Unlike the prototype of the proposed modifying the composition of the regeneration contains a simple combination of active components, the rubber-sulfur-henology ether”. In the literature, including the patent, there is no information about the use of combination chinalove esters with sulfur for modification of dispersed waste rubbers.

Use as a modifier regeneration waste rubber composition of the substances of this qualitative and quantitative composition is not known for other technical solutions. The introduction of the modifier composition, based on different rubbers combination “henology ether-sulfur” in the stated ratio and amount allows the use of this composition in the regeneration of diverse rubber waste, improve process and increase mechanical properties of the resulting rubber.

The observed process is, apparently, due to selective destructive impact of chemically highly active system “henology ether-sulfur” on macromolecules and cross-links surface layer of vulcanized rubber crumb.

The ability to achieve a positive effect in carrying out the invention is illustrated by the examples.

And the cooking, the modifying composition is carried out on standard mixing equipment rubber industry by mixing the components.

Properties of composition study at test regenerate, which is obtained by mixing the inventive modifier composition with crumb on a laboratory roll mill according to the following mode:

Modifying composition - 0 min

1/3 of crumb rubber - 1 min

1/3 of crumb rubber to 3 minutes

1/3 of crumb rubber to 5 minutes

Discharging the mixture to 7 minutes

Use rubber crumb based on butyl rubber dispersion to 8 mm, rubber crumb based on General purpose rubbers with textile inclusions, rubber crumb with metal inclusions obtained by crushing waste tires, dispersion up to 4 mm.

The vulcanization of the mixture is conducted on the vulcanizing press at 165°C for 20 minutes.

Results tables 1-5 show the possibility of using the obtained regenerate as a separate commodity rubber compound, for example, for items such as building and road coverage, coverage for railway crossings, nachalne strip, plates, mats, etc. that do not require complex high physical-mechanical properties.

Example 1.

Make the modifier composition according to the method of the prototype by mixing the components in a standard mixing equipment.

Modifying the composition has the following composition, parts by weight: rubber NK - 100, self named - 4, the zinc oxide - 1,5, rosin - 11, stearic acid, 2 - mercaptobenzthiazole -10, tert-butylperbenzoate - 10. The modifying composition is mixed with rubber crumb at the following ratio of 10:100. The vulcanization of the mixture is conducted on the vulcanizing press at 165°C for 20 minutes. Define the following parameters: conditional tensile strength, MPa - 6,79 and elongation at break, % - 490.

Example 2.

Make modifying composition comprising the chain caoutchouc ckmc-ARKM-15 - 100 parts by weight and the sulfur - 14 parts by weight, by mixing the components in a standard mixing equipment. Then the modifying composition is mixed with rubber crumb at the following ratio of 15:100. The vulcanization of the mixture is conducted on the vulcanizing press at 165°C for 20 minutes. Define the following parameters: conditional tensile strength, MPa to 4.0, and elongation at break, % - 490. In the absence of finalborgo ether in modifying the composition of the rubber have low strength.

Example 3.

Make modifying composition comprising the chain caoutchouc ckmc-ARKM-15 - 100 parts by weight and henology ether - 12 parts by weight, by mixing the components in a standard mixing equipment. Then the modifying composition is mixed with rubber crumb at the following ratio of 15:100. Volcanic activity is izatio mixture is conducted on the vulcanizing press at 165°C for 20 minutes. Define the following parameters: conditional tensile strength, MPa - 6,34 and elongation at break, % - 480. In the absence of sulfur in the modifying composition rubber have insufficient strength.

Example 4.

Make modifying composition comprising the chain caoutchouc ckmc-ARKM-15 - 100 parts by weight, henology ether - 4 parts by weight and the sulfur - 12 parts by weight, as in example 2. The modifying composition is mixed with rubber crumb at a mixing ratio of 15:100, carry out the vulcanization of the mixture on the vulcanizing press at 165°C for 20 minutes and define the following parameters: conditional tensile strength, MPa - of 6.71 and elongation at break, % - 470.

Examples 5-10 carried out analogously to example 4. The composition and properties of the modifier compositions are given in table 1.

The composition and properties of the inventive modifier composition based on SCMS-ARKM-15 were tested previously in mixtures of crumb rubber based on butyl rubber (table 1), and criterion for a further trial was a complex of properties in their optimal value, but the value of the strength characteristics was determined. The obtained parameters are compared with indicators of the rubbers on the basis of crumbs from butyl rubber containing a known modifier of regeneration waste rubber - prototype (example 1).

In examples 4-10 table is s 1 presents the test results of rubber with different ratios of finalborgo ether and sulfur modifier composition. In examples 2 and 3 modifier compositions contain only sulfur and henology ether, respectively.

Based on the above data it is seen that satisfactory strength properties receive only in the case of joint use of a mixture of “henology ether-sera (table 1, examples 4-10), and shows the trend of deterioration of this property is the separate effect of each of the components of this synergistic composition (table 1, examples 2 and 3). The results presented in table 1, indicate that a satisfactory value strength corresponds to the content of the modifying composition of finalborgo ether from 6.0 to 10.0 parts by weight of sulfur, and from 8.0 to 12.0 parts by weight, in other proposed dosages of finalborgo ether and sulfur level indicator of the strength of the rubber is reduced.

Examples 11-20.

Crushing waste tires get a crumb of different qualitative composition.

In examples 11-20 table 2 presents the test results of rubber made from the crumbs on the basis of General purpose rubbers containing textile (examples 11-15) and metal (examples 16-20) enable, with different ratios of finalborgo ether and sulfur modifier composition. In examples 11 and 16 presents the results of the tests with rubber modifier prototype.

From the data obtained it follows that in rekomenduu the ohms range of dosages of finalborgo ether and sulfur modifier composition obtained rubber, having a higher strength compared to rubber materials, manufactured with the use of a modifier of the prototype. Moreover, the level of strength properties of vulcanizates based on chips with metal inclusions is significantly higher compared to rubbers, made on the basis of crumbs with textile inclusions.

Examples 21-28.

Prepare the modifier composition, based on rubber stamps SCMS-ARKM-15, finalborgo ether and sulfur. Rubber mixtures based on butilkoi crumbs with different content of the modifier composition (table 3) prepare and vulcanized, as described above. For comparison prepared rubber mixture according to example 21 containing no modifier composition.

The results presented in table 3, indicate that the introduction boutelou crumb modifying composition in an amount of from 10 to 30 parts by weight of leaves practically stable basic properties of the obtained regenerate, however, the preferred dosage of 10-20 parts by weight (examples 23-25) from economic considerations. But the introduction of 40 parts by weight of modifier composition (example 28) leads to a reduction in the strength of the regenerate.

Examples 29-36.

Determine the possibility of using other (except SMS-ARKM-15) chain rubbers in the optimal recipe modifier composition (table 4). Prepare the modifier to the position-based rubbers SKN-AM (examples 29, 30), SKI-3 (examples 31, 32), the plant CU-50 (examples 33, 34), SCMS-ARKM-15 (examples 35, 36) with an optimal ratio of rubber, finalborgo ether and sulfur. Rubber mixtures based on butilkoi crumbs with 10 and 15 parts by weight of the modifier composition is prepared and vulcanized, as described above. For comparison, the test results of rubber from butilkoi crumb containing a known, taken as a prototype, modifier regeneration (examples 1, 29, 31, 33, 35).

The test results of rubber are given in table 4.

As can be seen from the data, all rubber, obtained by applying the inventive modifier composition, have a higher level of strength, compared to rubbers obtained by the use of modifier regeneration of the prototype.

Examples 37-44.

Prepare rubber compound butilkoi crumbs different particle size proposed, taken in the optimal ratio, the modifying composition. The dispersion used crumb was varied from 1 to 8 mm (examples 37-41). The content of the modifier composition of the mixture was changed from 10 to 15 parts by weight For comparison were prepared and tested rubber modifier prototype, butilkoi chips of various sizes and exorbitant doses of finalborgo ether and sulfur (examples 42, 44).

The rubber mixture is prepared and vulcanized, as described above. The test results of rubber are given in table 5.

As VI is but from the above data, increasing the size used butilkoi crumbs above 6 mm leads to a decrease of strength properties of the obtained resins. In the range of dispersion of from 1 to 6 mm with rubber declare modifying composition have higher strength compared to rubbers with modifier prototype.

Examples 45-57.

Perhaps the introduction of the regenerate with the claimed modifying composition in newly manufactured (fresh) rubber compound to reduce their value.

Preparing a rubber mixture according to the standard recipe intended for the outer layer of the sleeve (example 45, table 6), which contain 20 parts by weight of the regenerate. The rubber mixtures according to examples 46, 50 and 54, and 10.0 parts by weight of the regenerate was replaced by 10.0 parts by weight of a mixture of crumb rubber produced using the inventive modifier composition (table 6 this mixture noted, as modified crumb). In the rubber mixtures according to examples 47-49, 51-53 and 55-57 instead regenerate introduce a modified rubber crumb of different composition (boutelou, textile, metal inclusions, respectively) in different amounts (20, 40, 50 parts by weight).

As can be seen from the above data, the use of mixtures for the outer layer of the sleeve to 50 parts by weight of rubber crumb, processed claimed modifier composition, not only does not impair the strength show the Ley mixtures, but even in the examples with butilkoi crumb and crumb with metal inclusions, their increases. The performance of all investigated rubbers obtained within the required norms (normative indicators rubbers used the standard recipe for the outer layer of the sleeve are: conditional tensile strength - not less than 5.5 MPa; elongation not less than 250%; shore a Hardness from 50 to 65).

On the basis of all the above we can draw the following conclusions about the claimed modifying composition for regeneration and its advantages compared with the known:

obtained data demonstrate the operability of the claimed modifying composition in the full range of its stock;

- proposed modifying composition is not known from previous technical solutions and can be used in the manufacture of the regenerate of vulcanized rubber waste - rubber crumb of any composition;

effective regeneration of vulcanized rubber waste is due to the presence of modifying the composition of the regeneration of the synergistic mixture of the rubber-henology ether-sulfur” in the proposed ratio and amount;

- regenerate obtained with the use of the claimed modifying composition may be used alone as a trademark rubber mixture or as an additive is different rubber mixtures;

the manufacturing process of the regenerate, containing declare the modifying composition is at room temperature without pressure using standard equipment for production of rubber mixtures;

- creation of the claimed modifying the composition of the regeneration extends the range of the known products of this purpose;

- the use of the claimed modifying composition can be disposed of and use diverse, resulting in various areas of the plastics industry, large-tonnage waste vulcanized rubber, which is very important for environmental reasons.

Table 1
The mixture composition, parts by weightNumber example
1 (Prototype)2345678910
The crumb on the basis Bq100100100 100100100100100100100
Modifying composition10151515151515151515
The composition of the modifying composition: caoutchouc ckmc-ARKM-15-100100100100100100100100100
NC100---------
the air henology-- 124681011122
sulfur-14-13121086414
sulfenamid4---------
zinc oxide1,5---------
rosin11--/td> -------
stearic acid2--------
2-mercaptobenzthiazole10--------
tert-butylperbenzoate10-----
Performance rubber
Conditional strength of the ri gap, MPa elongation, %6,794,006,34of 6.717,52to 7.67a 7.926,546,474,82
490490480470440460460470480500

Table 2
The mixture composition, parts by weightNumber example
11 (Prototype)1213141516 Proto-type17181920
Babe with textile100100100100-----
inclusions
Babe with metal-----100100100100100
inclusions
Modifying composition1015 1515151515151515
The composition of the modifier
song:-100100100100-100100100100
the caoutchouc ckmc-ARKM-15100----100----
NC-4 61012-461012
the air henology-141286-141286
sulfur4----4----
sulfenamid1,5----1,5----
zinc oxide11-- --11----
rosin2---2----
stearic acid10---10----
2-mercaptobenzthiazole10---10----
tert-butylperbenzoate
Performance rubber
Conditional tensile strength, MPa3,863,605,225,133,527,28,710,3812,476,44
Elongation, %160180190170140400320430440290

Table 3
The mixture composition, parts by weightNumber example
2122232425 262728
The crumb on the basis Bq100100100100100100100100
Modifying composition-5101520253040
The composition of the modifying composition:
the caoutchouc ckmc-ARKM-15-100100100100100100100
the air henology- 121088864
sulfur-681010101214
Conditional tensile strength, MPa3,405,427,01to 7.677,527,307,246,47
Elongation, %290440470460440420400390

Table 4
The mixture composition, parts by weightNumber example
1 (Prototype) 29 (Prototype)3031 (Prototype)3233 (Prototype)3435 (Prototype)36
The crumb on the basis Bq100100100100100100100100100
Modifying composition101015101510151015
The composition of the modifier
song:-100100 ------
rubber SKN-AM---100100----
SKI-3-----100100--
Nairit CR-50-------100100
SCMS-ARKM-15100------- -
NC--8-8-8-8
the air henology--10-10-10-10
sulfur44-4-4-4-
sulfenamid1,51,5-1,5-1,5-1,5-
zinc oxide1111- 11-11-11-
rosin22-2-2-2-
stearic acid1010-10-10-10-
2-mercaptobenzthiazole1010-10-10-10-
tert-butylperbenzoate
Performance rubber
Conditional tensile strength, MPa6,796,908,026,41to 7.326,32a 7.926,24to 7.67
Elongation, %490290275470460310500400460

Table 5
The mixture composition, parts by weightNumber example
1 (Prototype)3738394041424344
The crumb on the basis Bq, 100100100100100100100100100
size, mm412468148
Modifying composition101015101510151015
The composition of the modifying composition, parts by weight: caoutchouc ckmc-ARKM-15100100100100100100100100
NC100 -------
the air henology-888884612
sulfur-101010101014126
sulfenamid4--------
zinc oxide1,5-- ------
rosin11--------
stearic acid2--------
2-mercaptobenzthiazole10--------
tert-butylperbenzoate10---- ----
Performance rubber
Conditional tensile strength, MPa6,797,728,027,41to 7.32of 6.717,128,06,24
Elongation, %490320410420450480340430420

53
Table 6
The mixture composition, parts by weightNumber example
45 (standard)4647484950515254555657
SKI-343,043,043,043,043,043,043,043,043,043,043,043,043,0
SCMS-ARKM-1557,057,057,057,057,057,057,057,057,057,057,057,057,0
Reclaim20,010,0---10---10 ---
Sulfur3,03,03,03,03,03,03,03,03,03,03,03,03,0
Sulfenamid C1,21,21,21,21,21,21,21,21,21,21,21,21,2
Zinc oxide1,51,51,51,51,51,51,51,51,51,51,51,51,
Chalk40,040,040,040,040,040,040,040,040,040,040,040,040,0
P90,090,090,090,090,090,090,090,090,090,090,090,090,0
Rubrics10,010,010,010,010,010,010,010,010,010,010,010,010,0
Oil MO-6 25,525,525,525,525,525,525,525,525,525,525,525,525,5
Acetonyl P1,01,01,01,01,01,01,01,01,01,01,01,01,0
Stearin0,50,50,50,50,50,50,50,50,50,50,50,50,5
N-nitrosodiphenylamine0,750,75 0,750,750,750,750,750,750,750,750,750,750,75
Modified crumb:
on the basis Bq-10204050--------
textile inclusions--- -10204050----
with metal inclusions--------10204050
Performance rubber
Conditional tensile strength, MPa8,047,027,838,187,78for 6.817,947,637,47of 7.908,538,508,11
Elongation, %54046090 490470400500530510570540530510
Elasticity, %34373637353634312834302726
Hardness shore, the river. units52545855565355545251525457

Modifying composition for processing rubber waste, including chain rubber, characterized in that the composition further comprises curing the system, composed of finalborgo ether and sulfur, in the following ratio of components, parts by weight:

chain rubber100
henology ether6-10
sulfur8-12



 

Same patents:

FIELD: chemistry.

SUBSTANCE: invention relates to compositions for making elastomer films used in making synthetic gloves, and a method of making elastomer films and gloves. The composition contains a synthetic polymer, sulphur, a metal oxide cross-linking agent and water. Sulphur is in amount of 0.01-0.5 parts per 100 parts of the polymer (phr). Total concentration of solid substances in the composition is 5-20% of the mass of the composition and the said composition does not contain an accelerator. The method of making a multilayer elastomer film involves the following steps: (i) dipping a mould into the composition, (ii) drying the composition and (iii) dipping the mould into the composition in order to deposit an additional layer of the elastomer film composition onto the mould, (iv) optional repetition of steps (ii) and (iii) and (v) drying and curing the elastomer film. The average thickness of the layer is 6-90% of the average overall thickness of the multilayer film. The average overall thickness of the elastomer film is approximately 0.01-0.3 mm.

EFFECT: increased strength of the multilayer elastomer film, reduced amount of composition for making an ariticle and reduced allergic reactions during contact with the elastomer films.

24 cl, 10 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: tread rubber mixture has a rubber component containing 10-30 wt % butadiene rubber in which syndiotactic 1,2-polybutadiene is dispersed, having average primary particle diametre not greater than 100 nm.

EFFECT: higher wear resistance of the tread rubber without reducing cohesiveness, cutting resistance.

4 cl, 38 ex, 6 tbl

FIELD: transport.

SUBSTANCE: invention relates to rubber industry, namely to the mix intended for forming tire bead squeezing part. Proposed mix comprises rubber component including at least one rubber from the group comprising natural rubber and epoxy natural rubber at least 30 parts by weight of silicon dioxide and at least no less 0.1 part by weight and not over 10 parts by weight of quinone di-imine compound per 100 parts by weight of said rubber component, and vulcanising agent. As quinone di-imine compound used is the compound representing N-{4-[(1,3-dimethyl bytil)imino]-2,5-cyclohexadiene-1-ilidine}-benzene amine. Proposed mix can additionally comprise not over 25 parts by weight of carbon black per 100 parts by weight of rubber component and not over 4 parts by weight of silane modifier per 100 parts by weight of silicon dioxide. Rubber component can comprise mix of natural rubber with epoxy natural rubber. Note here that content of said epoxy natural rubber can make at least 50% by weight of rubber component.

EFFECT: production of high-wear-resistance high-strength rubber plus lower consumption of oil origin products.

7 cl, 1 dwg, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to amine antioxidants for stabilising rubber, which are used together with antiozonants and antifatigue agents of the N-phenyl-N'-alkyl-n-phenylene diamine class of the diaphene FP, 6PPD type. The amine antioxidant is obtained in form of dustless powdered compositions through sorption of a liquid high-efficiency antioxidant N-phenyl-N'-2-ethylhexyl-n-phenylene diamine on fine mineral rubber filler such as traditional silica filler, deposited fine silica filler, chemically deposited chalk, kaolin, talc and others with mastication with the filler in ratio ranging from 30:70 to 70:30.

EFFECT: more effective effect of antiozonants and antifatigue agents of diaphene FP type rubber.

3 tbl, 8 ex

Rubber composition // 2383565

FIELD: chemistry.

SUBSTANCE: rubber composition contains 100 pts. wt rubber component [(a)+(b)] obtained from 20-80 wt % vinyl-cis-butadiene rubber (a) containing three components: 1,2 polybutadiene with melting point equal to above 170°C, high molecular substance with at least one unsaturated double bond on one repeating unit and which is a substance selected from at least one: polyisoprene, crystalline polybutadiene with melting point equal to or below 150°C, liquid polybutadiene and derivatives thereof, and a third component as a matrix component - cis-polybutadiene and (b) from 80 to 20 wt % rubber on a diene base, different from (a); and (c) from 40 to 100 pts. wt rubber reinforcement agent containing 40% or more silicon dioxide. (a) is obtained through cis-1,4-polymerisation of 1,3-butadiene in a solution on a hydrocarbon base using a catalyst with addition of a high-molecular substance after cis-polymerisation with subsequent 1,2-polymerisation. 1,2-polybutadiene is dispersed in short crystalline fibre state, just as the high-molecular substance is dispersed in cis-polybutadiene rubber separately, or in a state where they are linked to each other.

EFFECT: improvement of the rubber composition during extrusion with retention of good operational characteristics for skidding on a wet road, exothermal characteristics and resistance to abrasive wear.

12 cl, 4 dwg, 8 tbl, 52 ex

FIELD: chemistry.

SUBSTANCE: invention relates to rubber compositions particularly meant for making tyres or semi-finished products for tyres. The rubber composition based on at least a dienen elastomer contains a reinforcing agent, a cross linking system and a plasticising system. The plasticising system suitable for use when plasticising diene rubber composition is characterised by that it contains 5-35 phr oil MES (mean extraction solvates) or TDAE (treated distillate aromatic extracts) and 5-35 phr polylimonene resin, where phr presents weight parts per 100 parts of elastomer.

EFFECT: rubber composition has improved resistance to wearing and cutting.

44 cl, 6 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: thermoplastic elastomer material contains: (a) from 10 to 100 wt % of at least one thermoplastic elastomer based on styrene; (b) from 0 to 90 wt % of at least one thermoplastic homopolymer or copolymer of α-olefin, different from (a); where amount of (a)+(b) equals 100; (c) from 2 to 90 pts. wt of vulcanised rubber in crushed state; (d) from 0.01 to 10 pts. wt of at least one coupling agent which contains at least one unsaturated ethylene; where amounts (c) and (d) are expressed in ratio to 100 pts. wt of (a)+(b).

EFFECT: improved mechanical properties, specifically breaking stress and breaking elongation, increased wear resistance.

60 cl, 6 tbl, 6 ex

FIELD: medicine.

SUBSTANCE: N (4-anilinophenyl)amide of alkenylsuccinic acid of general formula , where n=6-18 is used as a stabiliser of phenylenediamine type. The stabiliser is introduced into latex in amount 0.1-1.5 weight fractions per 100 weight fractions of rubber as aqueous alkaline liquor. While using the stabiliser of low content of ballast substance less than 3% and high content of fragments of phenylenediamine type, is suitable to be introduced into latex.

EFFECT: maintained effective stabilisation and eliminated odour nuisance.

4 tbl, 12 ex

FIELD: chemistry.

SUBSTANCE: method involves reacting derivative of maleic anhydride with n-aminodiphenylamine while heating to temperature not above 90°C. The derivative of maleic anhydride used is alkenyl succinic anhydride or a mixture of alkenyl succinic anhydrides of general formula: , where n=6,8,10,12,14,16,18 with molar ratio of maleic anhydride links to n-aminodiphenylamine equal to 1.0-1.05:1.0.

EFFECT: improved processing characteristics of antioxidant, characterised by low dropping point, high efficiency for emulsion-polymerised rubber and latex, protection of said rubber from thermal-oxidative ageing.

1 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to compositions for making objects, for example tyres, tyre threads. This composition contains (a) natural or synthetic elastomer, subject to oxidative, thermal, dynamic, light and/or ozone induced decomposition, (b) white reinforcing filler and (c) linking agent. Component (c) used is at least one formula (I) compound: or oligomeric product from hydrolysis of formula (I) compound. Also described is a method of binding the white reinforcing filler with the elastomer composition, reinforced with white filler, involving introduction of at least one formula (I) linking agent into the elastomer and subsequent vulcanisation of the composition. Tyres made from the proposed composition have high tractive resistance.

EFFECT: improved final mechanical characteristics of elastomer, such as breaking extension, compression set and heat release.

18 cl, 7 ex, 4 tbl

Polymer composition // 2022984
The invention relates to the chemistry and technology of macromolecular compounds, in particular to composite polymeric materials that can be used in various sectors of the economy where these materials have high requirements for such properties that allow you to composite materials to withstand prolonged exposure to harsh factors of the cold climate and deep solar UV radiation with minimal loss of physical-mechanical indicators

FIELD: chemistry.

SUBSTANCE: invention can be particularly used in the cable industry when making electrical cable shielding used in explosive environments, in electrical engineering when making working sheath of earthing electrodes in general-purpose protective earthing systems, protection from static electricity and electrochemical protection from corrosion in the ground, fresh and sea water etc. The rubber mixture contains the following in pts. wt: synthetic ethylenepropylene diene rubber 90-100, technical sulphur 0.3-0.5, paraffin-naphthalene oil 10-15, bis-tertbutylperoxyisopropyl benzene 5.0-6.5, zinc oxide 5-8, electroconductive technical carbon 80-100, carbon-fibre material made from hydrocellulose fibre 15-25. The electrical current conductor comprises at least one conductor which has a shielding or working sheath made from the said rubber mixture.

EFFECT: improved operational characteristics of the electroconductive rubber mixture and electrical current conductors made from the said mixture.

4 cl, 2 tbl, 3 ex

Polymer composition // 2395542

FIELD: chemistry.

SUBSTANCE: invention relates to polymer compositions, particularly to rubber mixtures for making tyre treads and can be used in the tyre industry. The polymer composition contains the following components, in pts. wt: polybutadiene rubber SKD 20-30, polyisoprene rubber SKI-3 70-80, zinc oxide 4-5, technical carbon N339 50-55, oleic acid 1.5-2.0, sulphur 1.5-2.2, sulfenamide T 1.0-1.5, diaphene PP 1.0-1.5, Pikar hydrocarbon resin 2-3, oil PN-6s 10-15, Omsk-10 wax 1.5-2.0, acetonanyl N 1.5-2.0, santogard PVI 0.1-0.15, 3-15 mm long pieces of waste hybrid saturated cords 1.5-20.0.

EFFECT: increased extension elongation, bouncing elasticity and lower brittleness temperature.

2 cl, 4 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a rubber mixture for filling sides and tyres with a side filler made from the said rubber mixture. The said rubber mixture contains the following: 5-25 pts. wt phenol resin and/or modified phenol resin; 5.1-7.0 pts wt sulphur; 0.5-2.5 pts. wt hexamethylenetetramine; 2.0-5.0 pts. wt sulfenamide vulcanisation accelerator and/or thiazole vulcanisation accelerator; 0.1-5 pts. wt of at least one auxiliary substances for accelerating vulcanisation selected from a group consisting of citraconimide based compounds, a product of condensation of alkylphenol and sulphur chloride, an organic thiosulphate compound and a compound of the following basic formula: R'-S-S-A-S-S-R2, where A is an alkylene group containing 2-10 carbon atoms, and each of R1 and R2 is a univalent organic group containing a nitrogen atom per 100 pts. wt of diene rubber.

EFFECT: higher technological effectiveness of extrusion through optimisation of the rate of vulcanisation, improved hardness, stability of controlling an automobile and reduced specific fuel consumption.

6 cl, 6 ex, 2 tbl, 5 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to compositions for making elastomer films used in making synthetic gloves, and a method of making elastomer films and gloves. The composition contains a synthetic polymer, sulphur, a metal oxide cross-linking agent and water. Sulphur is in amount of 0.01-0.5 parts per 100 parts of the polymer (phr). Total concentration of solid substances in the composition is 5-20% of the mass of the composition and the said composition does not contain an accelerator. The method of making a multilayer elastomer film involves the following steps: (i) dipping a mould into the composition, (ii) drying the composition and (iii) dipping the mould into the composition in order to deposit an additional layer of the elastomer film composition onto the mould, (iv) optional repetition of steps (ii) and (iii) and (v) drying and curing the elastomer film. The average thickness of the layer is 6-90% of the average overall thickness of the multilayer film. The average overall thickness of the elastomer film is approximately 0.01-0.3 mm.

EFFECT: increased strength of the multilayer elastomer film, reduced amount of composition for making an ariticle and reduced allergic reactions during contact with the elastomer films.

24 cl, 10 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to industrial rubber and particularly to rubber mixtures for making frost resistant cushion blocks for railway line braces. The rubber mixture consists of the following in pts. wt: natural rubber - 100, zinc oxides - 5-10, crumbs made from corks - 10-15, P-514 technical carbon - 20-25, P-701 technical carbon - 15-25, technical sulphur - 1-2, acetonanil P - 1-2, sulfonamide C - 1.5-2.0, diaphene FP - 1-2, stearin - 1-2.

EFFECT: cushion blocks made from the said mixture have low residual deformation, high frost resistance, high noise and vibration damping capacity.

3 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to capsular additives for rubber, obtained in form of microcapsules with a polymer wall and a nucleus, which contains at least one additive for rubber. The capsule wall is formed by at least one component from a reactive resin and at least one component from a polyelectrolyte or ionomer component. The reactive resin is melamine formaldehyde resin and/or polyurea resin. The invention also relates to a method of preparing such microcapsules. The proposed microcapsules are used for vulcanising natural and synthetic rubber. The microcapsules are thermally and mechanically stable in conditions for preparing and processing rubber compositions in kneading machines, manglers or twin-screw extruders at temperatures ranging from 120°C to 140°C.

EFFECT: microcapsular additives are uniformly distributed in rubber mixture and prevent formation of a heterogeneous rubber/additive system.

30 cl, 12 ex

FIELD: chemistry.

SUBSTANCE: method for preparation of functionalised, bound or star-block copolymer used in sulphur-cured rubber composition containing carbon char and having in cured state decreased hysteresis with at least one of said blocks containing polyisoprene and at least one other block consisting of diene elastomer different from polyisopren with mole content of repeating units of one or more of conjugated dienes exceeding 15% includes: copolymerisation of one or more monomers containing at least one conjugated diene different from polyisoprene with catalitycal system containing hydrocarbon solvent halogenated or unhalogenated metal-organic compound A of the group IIIA metal, alkaline-earth metal compound B and polymer initiator C containing bound C-Li formed by unfunctionalised monolythium-containing polyisopren intended for formation of the said block or every polyisoprene block and (ii) adding to the product of the said polymerisation of the functionalising, binding or star-shape forming agent containing acetoxy group of formula Rn-Sn-(O-CO-R')4n> whereat n is integer natural number from 0 to 4 and R and R' each represents following groups: alkyl, cycloalkyl, aryl, aralkyl, same or different, for functionalisation or binding or forming of star-shape structure of the said block consisting of dien elastomer different from polyisopren. The said one or more polyisopren blocks have number average molecular mass Mn1 from 2500 to 20000 g/mole, the said one or more dien elastomer blocks have number average molecular mass Mn2 from 65000 to 350000 g/mole. Functionalised, bound or star-block copolymer, curable or cured rubber composition with lowered hysteresis in cured state, containing reinforcing filler completely or partially consisting of carbon char and containing aforementioned functionalised, bound or star-block copolymer are described also. Pneumatic tyre tread containing aforementioned rubber composition is described as well as pneumatic tyre containing described above tread.

EFFECT: hysteresis decrease of cured the rubber composition.

36 cl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to rubber industry, particularly to production of tyres and other rubber technical products. Rubber mixture contains mixture of caoutchoucs, wt.p - isoprene 40-60, butadiene - 25-40 and chlorine-containing ethylene-propylene-diene filled caoutchouc - 15-25. Chlorine-containing ethylene-propylene-diene caoutchouc is obtained by mixing of ethylene-propylene-diene caoutchouc and chlorine- containing hydrocarbon in presence of colloidal silicon dioxide. Rubber mixture also contains sulfur - 1-2, sulfenamide accelerator - 0.5-1.0, zinc oxide - 5-10, technical carbon - 40-60, colophony - 1-3, mineral oil - 5-10, sterol-indene resin - 2-8 and antiscorching agent - santogard PVJ-0.2-1.0 taken per 100 wt.p of caoutchouc mixture.

EFFECT: obtaining tyres which have increased resistance to ozone and thermal aging, as well as increased strength qualities at tension and elongation.

2 tbl, 1 ex

FIELD: chemistry, engineering process.

SUBSTANCE: present invention pertains to rubber industry, to production of elastic and wear resistant rubber based on butadiene-nitrile rubber. The rubber mixture contains the following, in wt.pts: butadiene-nitrile rubber - 18 with content of acrylonitrile - 17-23 wt % - 100, sulphur - 2.45-2.65, captax - 1.45-1.55, zinc oxide - 2.4-2.6, technical carbon "П803" - 1.4-1.6, thermal expanded graphite - 8-12.

EFFECT: improved elasticity and reduced bulk wear during abrasion, with significant reduction of content of technical carbon, which increases sealing ability and operational life of sealing devices, used in mobile friction assemblies.

2 tbl

Polymer composition // 2355719

FIELD: chemistry.

SUBSTANCE: invention concerns chemical industry, particularly production of polymer materials and composites with enhanced operational properties, and can be applied in rubber production industry. Polymer composition includes butadiene rubber, non-oil-extended butadienestryrene rubber, isoprene rubber, zinc oxide, silicic acid, stearic acid, polymer sulfur, diphenylguanidine, tetramethylthiuramsulfide and fullerene-containing carbon black with 100 mcm dispersity in amount of 0.79-2.96 wt %. Fullerene-containing carbon black is obtained by electric arc synthesis at graphite electrode in purified helium environment.

EFFECT: improved physical and mechanical properties of composition, eg 300% tensile modulus, rupture resistance, Shore hardness, rebound resilience, relative elongation, wear resistance, and quality of products using the composition.

1 tbl, 2 ex

Up!