CN104927132A - Rubber composition used for tread positions of sport tires - Google Patents

Abstract

The invention relates to a rubber composition used for tread positions of sport tires suitable for highways and drifting racing. The rubber composition is characterized by being composed of, by weight, 100-137.5 parts of styrene butadiene, 40-70 parts of carbon black, 20-30 parts of white carbon black, 1.5-2.5 parts of zinc oxide, 0.5-1.5 parts of stearic acid, 0.5-1.5 parts of homogenizing agent, 2-3 parts of Si-69, 1.5-2.5 parts of static protective agent, 1.5-2.5 parts of antiager, 1-3 parts of promoter, 1-3 parts of sulfur and 0.1-0.3 part of antiscorcher. The rubber composition takes requirements on performance in two aspects into consideration, has excellent wet land performance and dry land holding power and realizes harmonization of high controlling performance and low rolling resistance.

Description

A kind of rubber combination for sports type tire tread position

Technical field

The rubber combination at the sports type tyre surface position the present invention relates to tire manufacturing art, particularly relate to a kind of highway, drifting about dual-purpose.

Background technology

Tire is the component that an automobile uniquely contacts with road surface, and the maneuvering characteristics of automobile all needs by tire, power to be delivered to ground to realize, so the performance of tire directly affects the performance of automobile.According to tire used performance, adapt to road conditions and other special purposes, have quite strict specification to divide, wherein European labeling acts planning is divided into C1/C2/C3 tri-grades, the wherein car tire that comprises of C1, the special purpose tire (as racing car tire) that C3 comprises.At present, each giant tyre company drops into sizable research and development strength in fields such as full weather, multi-usages one after another, and as all season tyre, highway, drift about dual-purpose sports type etc.The tyre in motion of this high comprehensive performance rises very fast in recent years at home, and impact day by day increases.

The tyre in motion that domestic market uses is mainly based on the dry tire of racing car tire, but motor sport is thrown away at home and is belonged to leisure, recreational, most racing car fan reaction, these tires are only adapted to the service condition of racing car match, under normal road condition working conditions, still there is heat-dissipating large, the drawbacks such as oil consumption is high, inevitably deposit and change the drawbacks such as loaded down with trivial details, expensive in use.

Main body of the present invention is exactly be designed for the integrated motion type tire tread formula that highway uses with dry ground racing track simultaneously.

In highway, racing car dual-purpose sports type tire production technical field, realize tire wet-sliding resistant performance, dry ground gripping power, handling, high abrasion and low-heat-generation are pursuing a goal of development and Design.Dry tire in ordinary racer tire can only use in dry ground, the life-span of tire generally only has tens kilometers to hundreds of kilometer, and good earth-grasping force cannot be reached when low temperature, therefore racing car tire has to pass through hot tire, frictional coefficient is made to reach 1.4, to realize the earth-catching property of height, the frictional coefficient of conventional tyre is generally about 1.0, and highway, the over-all properties of racing car dual-purpose type kinematic synthesis car tire and racing car tire, in dry ground, there is higher initial friction coefficient, about about 1.2, and heat-dissipating is lower in road running process, meet normal road condition service condition, under wetland road conditions, keep higher wetland earth-grasping force simultaneously.

In recent years, along with the raising of tyre industry state of the art, various high-performance synthetical glue, the universal appearance of novel material, can evade as far as possible or break the restriction rule of tyre industry tread rubber devil triangle, make to collect low and roll resistance, excellent wetland performance, high-wear resistance is in the high-performance tire of one.The thermomechanical property in tire and ground interaction region is the main module determining tire used performance, particularly the ground area impact of tire tread glue is the most remarkable, the tread rubber dissipation factor measured near main utilization 60 DEG C in current industry characterizes tire drag, dissipation factor is less, and rolling resistance is lower.Dissipation factor near 0 DEG C then represents wetland and grasps performance, and dissipation factor is larger, and wetland gripping power is larger.Dissipation factor near 20-30 DEG C characterizes dry ground earth-catching property, and dissipation factor is larger, and dry ground gripping power is larger.

For highway, racing car dual-purpose type tyre in motion, it is taken into account highway and uses and racing car use properties, based on tread rubber dynamic properties characteristic features, so 0 DEG C high with the dissipation factor of 20-30 DEG C, there are excellent wetland performance and dry ground gripping power, the dissipation factor of 60 DEG C is in reasonable level simultaneously, and the unification taking into account handling and rolling resistance takes into account.

Summary of the invention

For solving above-mentioned technical problem, the object of this invention is to provide a kind of rubber combination being adapted to the dual-purpose sports type tire tread position of highway, racing car, the tread rubber dissipation factor Tan Δ of dynamic performance requirements 20-50 DEG C of this tread glue formula is higher than UHP, Tan Δ is between 0.2-0.3, the dissipation factor match tire of 60-80 DEG C is low, and Tan Δ is at 0.12-0.2.

In order to realize above-mentioned object, present invention employs following technical scheme: a kind of for sports type tire tread position rubber combination, comprising following component by weight:

Further, described styrene-butadiene rubber(SBR) is the solution polymerized butadiene styrene rubber of crude rubber Mooney viscosity between 41-49.

Further, the wet granulation carbon black that described carbon black selects total surface area (NSA) to manufacture at " furnace process " of 39-93m2/g, select in N375/N550/N660 one or more.

Further, described white carbon black selects specific surface area at 100-130m ²the high-dispersion white carbon black not comprising crystalline silica according to precipitator method manufacture technics of/g.

Further, described TL200 polymer resin is the high-purity monomer cumarone of softening temperature 155-165 DEG C and the polymer resin of indenes.

Further, described static protective agent is the mixture of 56%-66% straight-chain paraffin and 34%-44% branched paraffin.

Further, described even promotor is vulkacit D class white carbon black dispersion enhancing agents, preferably.

Further, described sulphur adopts insoluble sulfur, and described promotor is orpiment amides promotor, and preferred described sulphur adopts insoluble sulfur IS7020, and described promotor is N-cyclohexyl-2-[4-morpholinodithio sulphenamide.

The present invention also provides a kind of preparation method for sports type tire tread position rubber combination, comprises the steps:

(1) first styrene-butadiene rubber(SBR), anti-aging agent, static protective agent, polymer resin, evenly promotor, zinc oxide and stearic acid are dropped into Banbury mixer mixing 10-60S under the speed of rotating speed 30-100 rev/min;

(2) in said mixture, add white carbon black, add the mixing 1-30min of carbon black after mixing 1-10min, the binder removal when temperature is 130-160 DEG C;

(3) after parking 3-6 hour, then add sulphur, promotor, the mixing 1-5min of low speed under the speed of 10-50 rev/min, then discharge until rubber master batch cooling, obtain rubber combination.

Preferably, prepare according to following processing condition:

(1) first styrene-butadiene rubber(SBR), anti-aging agent, static protective agent, evenly promotor, zinc oxide and stearic acid are dropped into Banbury mixer mixing 30S under the speed of rotating speed 50 revs/min;

(2) in said mixture, add white carbon black, after mixing about 1min, add the mixing 2min of carbon black, the binder removal when temperature is about 155 DEG C;

(3) after parking 4 hours, then add sulphur, promotor, the mixing about 2min of low speed under the speed of 30 revs/min, then discharge until rubber master batch cooling, obtain rubber combination.

Beneficial effect of the present invention is:

Styrene-butadiene rubber(SBR) in the present invention is solution polymerized butadiene styrene rubber, and be through a kind of solution polymerized butadiene styrene rubber of molecule chain end modification, it has the following advantages: the high balance quality 1) rolling resistance and wetland; 2) processing safety is good, and vulcanization rate is fast; 3) ageing resistance is excellent;

The rubber combination for sports type tire tread position of the present invention's design, the Butadiene-Styrene Rubber system of molecule chain end modification selected by tyre surface rubber, the low coordinating and unifying of rolling resistance and high wet-sliding resistant is provided, carbon black is selected high-dispersion white carbon black and low-heat-generation carbon black and is used, even promotor selects vulkacit D class vulkacit D in order to promote that white carbon black disperses, give full play to the effect of white carbon black, in order to improve wet-sliding resistant performance.The high-purity monomer cumarone selected and the polymer resin of indenes can significantly improve tyre surface at dry the earth-grasping force with wetland, improve tire handling, improve the anti tear of tyre surface simultaneously and anti-ly collapse the performance using up block.Vulcanization system selects insoluble sulfur, and is SE curing system with accelerator ratio, in order to reduce heat-dissipating.

The rubber combination for sports type tire tread position of the present invention's design, except rubber, carbon black, promotor and sulphur, also use various function Synergist S-421 95 as zinc oxide, stearic acid, static protective agent, dynamic protection agent, scorch retarder etc., the dynamic properties of the static physical mechanical propertys such as the tread rubber obtained has excellent stretching, tears, wear resisting property and excellence, the Tg temperature lower than common UHP tire, high anti-slippery, handling and low rolling resistance in use.

Tread glue formula affects the gum base ingredients that shared by tire used performance, weight is maximum, the rubber combination for sports type tire tread position of the present invention's design, directly increase devil's iron triangle area of anti-slippery, rolling resistance, wear-resisting tripartite, take into account low rolling resistance and the high anti-slippery coordinating and unifying, thus, highway can be met and the dual-purpose performance requirement that drifts about of racing simultaneously, reduce drift fan loaded down with trivial details switching common road tire and the drift time of tire and the waste of money greatly.

Embodiment

Below optimum embodiment of the present invention, only for illustration of technical scheme of the present invention.The concrete manufacturer trade mark of described each component is all that those skilled in the art can be inquired about by commercial channel and buy.

Solution polymerized butadiene styrene rubber, its trade mark is NS116R;

Carbon black selects the carbon black that the trade mark using Cabot Co., Ltd to produce is N234;

The high-dispersion white carbon black of 115 specifications that white carbon black uses Rhodia to produce;

The polymer resin TL200 of high-purity monomer cumarone and indenes, You Tong journey group produces, and the trade mark is NOVARESC160;

The mixture of the paraffin that static protective agent adopts Lay mattress chemistry (Qingdao) company to produce and Microcrystalline Wax, name is called Antilux111;

Sulphur adopts Wuxi China to contain the insoluble sulfur produced, and the trade mark is IS-7020;

Promotor selects the Shandong trade mark that still Shun produces to be the orpiment amides promotor of CBS, i.e. N-cyclohexyl-2-[4-morpholinodithio sulphenamide.

According to technical scheme preferred embodiment A disclosed by the invention and Embodiment B, its formula is as follows:

Table 1 Example formulations forms

Formula number	A	B
			Material	Number	Number
NS116R	137.5	137.5
			N234	60	50
SIL822MP	25	35
			Si-69	2.5	3.5
ZnO	2	2
			Stearic acid	1	1
Even promotor	2	2.5
			TL-200	2	2
Antilux111	2	2
			4020	1	1
CBS	1.7	1.8
			IS-7020	1.7	1.6
Other	5	5

The preparation method of described rubber combination: first styrene-butadiene rubber(SBR), polymer resin, anti-aging agent, static protective agent, evenly promotor, zinc oxide and stearic acid are dropped into Banbury mixer mixing 30S under the speed of rotating speed 50 revs/min, then in said mixture, white carbon black is added, the mixing 2min of carbon black is added after mixing about 1min, the binder removal when temperature is about 155 DEG C, until rubber master batch cooling and after parking 4 hours, add sulphur, promotor again, the mixing about 2min of low speed under the speed of 30 revs/min, then discharge, obtains rubber combination.

Table 2 is physicals tables of composition, cure conditions: 150 DEG C of * 30min

Table 2 Main physical performance

Formula number	A	B
			Hardness (shore A)	68	70
100% stretches (MPa) surely	2.3	2.6
			300% stretches (MPa) surely	14.36	13.35
Elongation at break (%)	397	348
			Tensile strength (MPa)	17.52	18.43
Resilience %	42	40

The dynamic properties table of table 3 composition, DMA test condition :-75 DEG C of-65 DEG C of temperature scannings.Adopt the test of plum Teller dynamic mechanical analyzer.

Table 3 dynamic properties

DMA	A	B
			Tg/℃	-17.88	-16.32
0℃	0.72	0.67
			40℃	0.20	0.28
60℃	0.18	0.22

Adopt above-mentioned formula A and B to manufacture experimently testing laboratory's machine tool capability test of sports type tire in table 4, trial-production specification performs according to 225/45RF17.

Table 4 machine tool capability test result

Indoor performance is tested	A	B
			High speed performance	Pass through	Pass through
Endurance quality	Pass through	Pass through

The above is not limitation of the present invention; be noted that for those skilled in the art; under the prerequisite not departing from essential scope of the present invention; can also make some changes, remodeling, interpolation or replacement, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (10)

1. for a sports type tire tread position rubber combination, it is characterized in that, comprise following component by weight:

2. a kind of for sports type tire tread position rubber combination according to claim 1, it is characterized in that, described styrene-butadiene rubber(SBR) is the oil-filled solution polymerized butadiene styrene rubber of crude rubber Mooney viscosity between 41-49.

3. a kind of for sports type tire tread position rubber combination according to claim 1, it is characterized in that, described carbon black selects total surface area (NSA) at 39-93m ²the wet granulation carbon black manufactured according to furnace process of/g, one or more preferably in N375/N550/N660.

4. a kind of for sports type tire tread position rubber combination according to claim 1, it is characterized in that, described white carbon black selects specific surface area at 100-130m ²the high-dispersion white carbon black not comprising crystalline silica according to precipitator method manufacture technics of/g.

5. a kind of for sports type tire tread position rubber combination according to claim 1, it is characterized in that, described static protective agent is the mixture of 56%-66% straight-chain paraffin and 34%-44% branched paraffin.

6. a kind of for sports type tire tread position rubber combination according to claim 1, it is characterized in that, described even promotor is vulkacit D class white carbon black dispersion enhancing agents.

7. a kind of for sports type tire tread position rubber combination according to claim 1, it is characterized in that, described TL200 polymer resin is the high-purity monomer cumarone of softening temperature at 155-165 DEG C and the polymer resin of indenes.

8. one is used for sports type tire tread position rubber combination according to claim 1, it is characterized in that, described sulphur adopts insoluble sulfur, and described promotor is orpiment amides promotor.

9. one according to claim 1 is used for sports type tire tread position rubber combination, it is characterized in that: described rubber combination is at the tread rubber dissipation factor Tan Δ of 20-50 DEG C between 0.2-0.3, and the dissipation factor Tan Δ of 60-80 DEG C is at 0.12-0.2.

10. a kind of preparation method for sports type tire tread position rubber combination according to claim 1, is characterized in that, comprise the steps:

(1) first styrene-butadiene rubber(SBR), anti-aging agent, static protective agent, evenly promotor, zinc oxide and stearic acid are dropped into Banbury mixer mixing 10-60S under the speed of rotating speed 30-100 rev/min;

(2) in said mixture, add white carbon black, add the mixing 1-30min of carbon black after mixing 1-10min, the binder removal when temperature is 130-160 DEG C;

(3) after parking 3-6 hour, then add sulphur, promotor, the mixing 1-5min of low speed under the speed of 10-50 rev/min, then discharge until rubber master batch cooling, obtain rubber combination.