Polymer composition

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

 

The invention relates to compositions and polymer compositions, in particular to the rubber mixtures for the manufacture of treads of tires, and can be used in the tire industry.

Known rubber compound based on unsaturated rubbers (see A.S. No. 1008215, publ. 30.03.83), including a 1.5 to 15.0 parts by weight per 100 parts by weight of rubber, fiber, modified in a 1:1 ratio of low molecular weight butadiene-nitrile rubber with the content of Acrylonitrile units 10-18% and carboxyl groups of 2.5-3.5% and molecular weight of 2000-10000.

A disadvantage of the known rubber mixture is increased embrittlement temperature, do not allow the use of the rubber mixture in a wide temperature range.

Also known rubber mixture based on butadiene-nitrile rubber (see A.S. No. 966097, publ. 15.10.82 g)containing metaphenylenediamine and polyvinyl alcohol fiber with a fiber length of 4-10 mm in the following ratio of components, parts: rubber - 100, oligopyrroles TMG-3 - 5-20, metaphenylenediamine - 0.5 to 10.0, polyvinyl alcohol fiber - 20-50, peroxide - 2-3.

The disadvantage of this rubber compound is a low tensile strength tear that does not allow you to use it in important parts of products.

The closest set of technical characteristics and achieved technical result - prototype - is the rubber is mesh (see patent RU No. 2309962, publ. bull. No. 31 from 10.11.2007, containing in parts by weight of butadiene-nitrile rubber - 80,0, hydrogenated NBR - 20,0, sulfur - 3,5, sulfenamid M - 0,5, Altex - 0,5, stearic acid - 1,0, rosin - 2,0, deburocratisation - 11,0, white soot - 5,0, zinc - 4,0, deafen OP - 2,0, carbon black P-245 - 50,0, modifier ROUX-2 - 2,0, aramid, or nylon fiber - 10,0.

The disadvantages of the prototype are also improved low temperature brittleness, low elongation under tension and lack of elasticity, which prevents its use in products that require high dynamic endurance when operating in a wide temperature range, for example in the treads of pneumatic tires.

The task of the invention is to remedy these disadvantages, the technical result which will be the improvement of physico-mechanical properties: elongation at tensile, elastic rebound, and low temperature brittleness.

This technical result is achieved due to the fact that the polymer composition containing components, has a new, previously unknown ratio of components, parts by weight:

rubber SKD - 20-30

rubber SKI-3 - 70-80

carbon black N339 - 50-55

zinc oxide 4,0-5,0

oleic acid - 1,5-2,0

sulfur - 1,5-2,2

oil MO-6 sh - 10,0-15,0

wax Omsk-10 - 1,5-2,0

acetonyl N - 1,5-2,0

sulfenamid C - 1,0-1,5

santogard PVI - 0,1-0,15

deafen OP - 1,0-1,5

cuts waste impregnated hybrid cord

length 3,0-15,0 mm - 1,5-20,0.

When you do this:

- sulfenamid C (N-cyclohexyl-2-benzothiazolylsulfenamide) is an effective accelerator with delayed action in the initial stage of vulcanization, cream or yellow-white powder:

p=1.3 g/cm3; melting point 103°C;

- santogard PVI (N-cyclohexylthiophthalimide) - is a universal inhibitor of podocarpaceae;

- acetonyl N (polymerized 2,2,4-trimethyl,2-dihydroquinoline) is a product of the condensation of acetone with aniline, antioxidant - protects against heat aging and ozone cracking;

- wax Omsk-10 - brown microcrystalline product processing Tuimazy oil, a mixture of ceresin and oil with a predominance of hydrocarbons, which do not form complexes with urea (these ingredients, see "Handbook of reinsta M.: Chemistry, 1971);

hydrocarbon resin "Picard" - derived unsaturated fraction5and maleic anhydride (see Rubber & rubber, 2006, №2, p.21), ground and cheshuirovannyj or granular product from yellow to dark brown - policital adhesiveness to rubber mixtures (manufactured by LLC "Fosforos" Kazan).

About Islena applicability of the claimed invention is what if in a known prototype uses nylon or aramid cord, then under the application of the proposed hybrid cord aramid yarns in the warp and weft is a two - component filaments, for example hlopkopryadeniya and/or globcorine.

Vysokokritichnyh oriented structure armignago cord on the prototype does not provide for adequate treatment to achieve the required adhesion.

Hybrid cord with the same weft by impregnation in two stages allows you to achieve this.

According to the invention uses a hybrid cord, which is made of three types:

- thread SVM with a high breaking load;

- thread Armos retaining high strength;

- thread Rusar, characterized by high relative strength (manufacturer JSC company", see Materials for tire production and technical rubber products. Publishing house of the GOU VPO "Restitle" branch in Omsk, 2003, p.163-164).

1st impregnating composition:

Name ingredientswt.%
Demineralized water84
5% aqueous solution of caustic soda2
5% solution doctral the succinate sodium 2
Caprolactam10
Diglycidyl ether of glycerin2

2nd impregnating composition:

Name ingredientswt.%
Demineralized water52,4
25% aqueous ammonia solution1,0
75% aqueous solution of Novolac
resorcinolformaldehyde resin3,7
40% butadienyl-2-vinyl-
-pyridine latex41,0
37% formalin1,9

Impregnated 1st part of a hybrid cord is first dried for 2 min at 150°C, then subjected to heat treatment for 1 min at 240°C.

Hybrid cord soaked in 2-composition, dried at the same conditions, then subjected to heat treatment 1.5 min at 235°C.

Impregnated hybrid cord goes on the further processing and the manufacture of parts, prefabrica the s and products.

When this is formed, depending on the technology of manufacturing wastes of various lengths and widths.

Then in a known manner are cut from waste impregnated hybrid cord segments of length 3,0-15,0, which are introduced into the rubber mixture for the running part of the tread - 10-15 mm sides - 7-10 mm, podanego layer 3-7 mm, providing high adhesion between rubber and impregnated segments of the hybrid cord and thereby increased physical-mechanical parameters.

Table 1
The compositions of the known and proposed polymer compositions
ComponentsThe content of the components is 100 parts by weight of rubber; parts
Known123
Rubber nitrile butadiene BNX 40 AM80,0---
Rubber butadiene-nitrile hydrogenated BNCW 3020,0---
Rubber SKD-20,025,030,0
Rubber SKI-3-80,075,070,0
Sulfur3,51,51,72,0
Zinc oxide4,04,04,55,0
Sulfenamid M0,5---
Sulfenamid C-1,01,21,5
Alltex0,5---
Stearic acid1,0---
Sour is as oleic -1,51,72,0
Rosin2,0---
Dialogsettings11,0---
White carbon black BS-1205,0---
Deafen AF2,01,01,31,5
Modifier RU-D2,0---
Carbon black P-80320,0---
Carbon black P-24550,0---
Technical ug is erod N339 -50,053,055,0
The hydrocarbon resin "Picard-2,02,53,0
Oil MO-6 W-10,0to 12.015,0
Wax Omsk-10M-1-2,01,71,5
Acetonyl N-1,51,72,0
Santogard PVI-0,10,120,15
Aramid fiber10,0
Cuts waste hybrid impregnated cord length 3-15 mm1,5
DL. 10-15-mm
10,0
DL. 7-10 mm
20,0
DL. 3-7 mm

The set of essential features according to the invention allows to obtain a qualitative improvement of physico-mechanical properties: elongation at tensile strength and elasticity to rebound.

The novelty of the invention lies in the use of segments of waste impregnated hybrid cord in the tread rubber compound.

Formed in the polymer production waste impregnated hybrid cord (TU 2281-031-16710413-2007) are cut into segments of length 3,0-15,0 mm and then entered in the process retinopatia in the polymer composition for the running part of the tread 10-15 mm in length and 1.5 to 20.0 parts for sidewall tread length 7-10 mm - 1,5-17,0 parts, podanego layer of protector 3-7 mm to 1.5 to 15.0 parts by weight of

Manufacture of polymer compositions is carried out in two stages in a rubber mixer: in the first stage with the volume of the mixing chamber 270 l and the number of revolutions of the rotors 40 rpm for 3 min, in the second stage with the volume of the mixing chamber 250 l and the number of revolutions of the rotor - 30 rpm for 2 minutes.

Table 2
Manufacturing polymeric composition stage 1
No.The sequence of the operas the Nations Time min
1Download: rubber, oleic acid, zinc oxide, oil MO-6 sh, deafen OP, carbon black N339, the hydrocarbon resin "Picard"0
2Download: wax Omsk-10M-1, acetonyl N1,5
3Download: pieces of waste impregnated hybrid cord2,5
4Upload: polymer composition3,0
The temperature of the rubber mixer22±5°C
The temperature of the rubber mixture during unloading80±5°C
The number of revolutions of the rotor40 rpm

After the rubber mixer a mixture of 1-stage process on the granulator and pneumatic sent to the rubber mixer stage 2.

Table 3
Manufacturing polymeric composition stage 2
No.The sequence of operationsTime min
1Download: Royal mixture of 1-St stage0
2Download: sulfur, sulfenamid C, santogard PVI1,5
3Upload: polymer composition2,0
The temperature of the rubber mixer20±3°C
The temperature of the mixture at discharge70±5°C
The number of revolutions of the rotor30 rpm

Properties of the proposed polymer composition in comparison with the prototype presented in table 4.

Table 4
Properties of rubber compounds by known and proposed structures
№№ p/p Name of indicatorKnown polymer compositionThe proposed polymer composition
123
1Conditional tensile strength, MPa1919,019,019,0
2Elongation, %50520500490
3Tear resistance, kN/m9797100110
4Ball rebound resilience, %26474745
5Low temperature brittleness, °C-40-60-62-65

Analysis of the s, in table 4, shows that the proposed according to the invention the polymer composition has a significantly better performance on measures: elongation, low temperature brittleness and elasticity.

Proposed according to the invention the polymer composition allows to use it in the tread, sidewall and podkrasochnoy layer of tires in a wide temperature range.

The introduction of segments of waste impregnated hybrid cord in the tread rubber compound provides for the maintenance of buses improved resistance to cuts, the emergence of pellets and chipping of rubber, has an effect on hysteresis and heat build-up in the bus and gives the following improved properties: increases the durability of the tire, reduced rolling resistance, which will lead to a significant reduction in fuel consumption.

1. Polymer composition on the basis of stereoregular rubber is polybutadiene ACS branch, Rubezhnoe, Ukraine and SKI-3, including carbon black, zinc oxide, oleic acid, sulfur, sulfenamid C, deafen OP, the hydrocarbon resin "Picard", oil MO - 6 sh, wax Omsk-10, acetonyl N, santogard PVI, cuts waste impregnated hybrid cord length 3-15 mm in the following ratio of components, parts by weight:

the polybutadiene rubber SKD 20-30
the branch, Rubezhnoe, Ukraine rubber SKI-370-80
carbon black N33950-55
zinc oxide4-5
oleic acid1,5-2,0
sulfur1,5-2,2
sulfenamid C1,0-1,5
deafen AF1,0-1,5
the hydrocarbon resin "Picard"2-3
oil MO-6 W10-15
wax Omsk-101,5-2,0
acetonyl N1,5-2,0
santogard PVI0,1-0,15
cuts waste soaked
hybrid cord length 3-15 mmof 1.5 to 20.0

2. Polymer composition according to claim 1, characterized in that it contains pieces of waste impregnated hybrid cord for the running part of the tread 10-15 mm in length and 1.5 to 20.0 parts for bakovi the s protector-length 7-10 mm - 1,5-17,0 parts, podanego layer protector-3-7 mm to 1.5 to 15.0 parts by weight of



 

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