CROSS-REFERENCE TO RELATED APPLICATION

The present application is a 35 U.S.C. § 371 National Phase conversion of International (PCT) Patent Application No. PCT/CN2018/086804, filed on May 15, 2018, which claims priority of Chinese Patent Application No. 201710349624.8, filed on May 17, 2017. The entire disclosure of the above to identified application, including the specification and claims are incorporated herein by reference in its entirety. The PCT International Patent Application was filed and published in English.

TECHNICAL FIELD

The present disclosure relates to automobile technology, and more particular to a low-odor, environmental friendly rubber mixture and a tire especially a spare tire made by the rubber mixture.

BACKGROUND ART

Tire is one of the most important components in a vehicle, which directly contacts with the road surface, bears vehicle gravity, transmits traction, braking force and steering force, and endures counter force of the road. Cooperating with automotive suspension system, the tire buffers the impact on the vehicle during traveling and ensures the vehicle having good ride comfort. Furthermore, the tire keeps the wheel having good adhesion with the road surface, improves the traction performance, the braking performance and the trafficability of the vehicle, and bears the weight of the vehicle body. Accordingly, the important role of the tire in the vehicle is getting more and more attention.

Due to tires will wear and tear during use, the tire will blowout occasionally in the absence of replacement for a long period of time. For facilitating the safe driving of the vehicle, a spare tire is usually provided for a sport utility vehicle (SUV) in case of need. The spare tire is usually placed at the rear of the sedan or at the bottom of the trunk of the hatchback. As we all know, the main components of the existing tires are rubber and additives. The new spare tire will emit bad odors and affect human health. In order to reduce the health hazards to the passengers after the odor emitted by the spare tire spread to the cab, the commonly used method is to seal the spare tire by a sealed bag. However, this method could not solve the odor problem of the tire from the root.

With the implementation of laws and regulations related to worker protection and non-toxic and environmental friendly production in the world, especially in Europe and the United States, it is a trend for automobile companies, especially passenger car manufacturers, to pay more attention to reduce the odor of the tire products.

In order to solve the above problems, the applicant analyzed the actual use scenario of the spare tire and found that the minimum requirement for the spare tire is to solve the urgent requirement caused by tire burst, so that the driver can replace the spare tire in time and travels to a nearby maintenance office to replace an original new tire in a speed not lower than the minimum allowable speed (for example, 60 to 80 km/h) of the freeway. The distance traveled by the spare tire is usually 20 to 30 km.

For normal tires, the existing tire production materials and processes will generate dust and smoke in high temperature condition, and generate irritant gases due to volatilization of raw materials and products, and degradation of additives, and accordingly affects the health of the workers. During use, the friction generated between the tire and the road surface, and the fact that the tire being heated by the sun will cause the rubber material in the tire to evaporate bad odor and affect the ride comfort of the vehicle. If this occurs for a long period, it will further affect the health of the drivers who drives all year round.

Chinese Patent Publication Number CN104672557A discloses a pneumatic rubber tire prepared from the following raw materials: 20 to 30 parts by weight of styrene-butadiene rubber, 20 to 30 parts by weight of natural rubber, 4 to 5 parts by weight of zinc oxide, 10 to 12 parts by weight of carbon black, 4 to 5 parts by weight of silica, 2 to 3 parts by weight of isoprene, 1 to 3 parts by weight of cross-linking agent, 2 to 3 parts by weight of sulfur, 3 to 5 parts by weight of stearic acid, and 1 to 2 parts by weight of antioxidant. However, the above composition contains a variety of hazardous substances, such as zinc oxide dust is likely to cause damage to the respiratory system of the workers, carbon black is likely to cause harm to the human body through the respiratory tract and the skin.

Therefore, it is necessary to provide a low odor and environmental friendly rubber mixture and a tire made by the rubber mixture, which could improve the odor problem of the tire, and reduce harm to the environment during the production, the storage and the use of the tire as well as satisfying the minimum allowable speed requirement of the freeway.

TECHNICAL SOLUTION

The embodiments of the present disclosure provide a rubber mixture consisting essentially of: at least one kind of polar or non-polar rubber, at least one kind of filler, at least one kind of vulcanizing agent, at least one kind of accelerant, an optional anti-scorching agent, and an optional aromatic material, wherein the accelerant is a compound containing two or more X-Y single bonds, wherein X is selected from element O and S, and Y is selected from element N and P.

In an embodiment of the present disclosure, the accelerant is a compound containing two or more S—N single bonds, S—P single bonds, O—P single bonds, or O—N single bonds.

In an embodiment of the present disclosure, the accelerant is N-cyclohexyl-bis (2-mercaptobenzothiazole) sulfonamide, N-tert-butyl-bis(2-benzothiazole)sulfonamide and/or zinc dialkyldithiophosphate.

In an embodiment of the present disclosure, the accelerant is used in an amount of 1 phr to 6 phr.

In an embodiment of the present disclosure, the polar or non-polar rubber is selected from one or more of the group consisting of: natural rubber, synthetic polyisoprene, butadiene rubber, styrene-butadiene rubber, solution-polymerized styrene-butadiene rubber, emulsion-polymerized styrene-butadiene rubber, nitrile rubber, liquid rubber, halogenated butyl rubber, butadiene rubber, isoprene rubber, isoprene-isobutylene copolymer, ethylene-propylene-diene rubber, chloroprene rubber, acrylate rubber, fluorine rubber, silicone rubber, polysulfide rubber, epichlorohydrin rubber, styrene-isoprene-butadiene trimer, hydrogenated acrylonitrile-butadiene rubber, isoprene-butadiene copolymer, and hydrogenated styrene-butadiene rubber.

In an embodiment of the present disclosure, the polar or non-polar rubber is selected from one or more of the group consisting of: natural rubber, styrene-butadiene rubber, nitrile rubber, butadiene rubber, isoprene rubber, and ethylene-propylene-diene rubber.

In an embodiment of the present disclosure, the polar or non-polar rubber is used in an amount of 0.1 phr to 80 phr.

In an embodiment of the present disclosure, the polar or non-polar rubber is natural rubber or synthetic polyisoprene, and the use amount is 0.1 phr to 20 phr.

In an embodiment of the present disclosure, the polar or non-polar rubber is butadiene rubber, and the use amount is 2 phr to 50 phr.

In an embodiment of the present disclosure, the polar or non-polar rubber is styrene-butadiene rubber, the use amount is 2 phr to 80 phr.

In an embodiment of the present disclosure, the filler is selected from one or more of the group consisting of: glass fiber, modified kaolin, attapulgite, magnesium carbonate, copper fiber and glass beads, and the filler is used in an amount of 20 phr to 80 phr.

In an embodiment of the present disclosure, the at least one kind of vulcanizing agent includes: sulfur, selenium, tellurium, sulfur-containing compounds, peroxides, quinone compounds, amine compounds, resin compounds, metal oxides, isocyanates, platinum vulcanizing agent, or N, N′-m-phenylene bismaleimide, and the vulcanizing agent is used in an amount of 1 phr to 10 phr.

In an embodiment of the present disclosure, the anti-scorching agent is N-chloroformylthio-4-propionene-dicarboximide and/or a mixture of 92% of benzene sulfonamide derivative, 6% of inert filler and 2% of oil, and the anti-scorching agent is used in an amount of 0.1 phr to 5 phr.

In an embodiment of the present disclosure, the aromatic substance is a high-temperature-resistant aromatic substance which is plant essence or mint, and the high-temperature-resistant aromatic substance is used in an amount of 0.1 phr˜3 phr.

The embodiments of the present disclosure further provide a tire made of the above rubber mixture.

The rubber mixture and the tires (especially spare tires) made by the rubber mixture of the present disclosure utilize improved accelerants to avoid generation of the pungent volatile organic compound such as aniline, cyclohexylamine, tert-butylamine and the like, therefore improving the odor problems of the tires. In addition, when the use of anti-scorching agent is required, the present disclosure instead the CTP in the prior art by CTT and VE.C to reduce the generation of pungent imine, which also has a positive effect on improving the tire odor. Meanwhile, the present disclosure does not include carbon black, zinc oxide and other substances with fine powders, which reduces dust hazards to the operation workers. Finally, the addition of aromatic substances further enhances the fragrance of the tires on the premise of having as little volatile organic volatiles as possible.

In order to further elucidate the technical means and efficacy of the present disclosure for achieving the intended purpose of the disclosure, the present disclosure will be described in more detail with reference to the preferred embodiments as follow.

