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All-steel truck radial tire formula rubber material and preparation method thereof

A technology of radial tires and rubber materials, applied in the field of tire rubber, can solve the problems of poor BR compatibility, easy aging, and poor compatibility, and achieve good comprehensive physical and mechanical properties, easy control and industrialization, and simple preparation methods Effect

Pending Publication Date: 2021-10-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In view of the poor compatibility of BR used in existing tires with natural rubber (NR) and styrene-butadiene rubber, NR and BR in the vulcanized rubber appear to separate, which can easily lead to tearing and falling off of the rubber material and carcass Defects such as cracks and easy aging, and the technical problems of poor compatibility of the tire tread, tire belt and tire sidewall

Method used

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  • All-steel truck radial tire formula rubber material and preparation method thereof
  • All-steel truck radial tire formula rubber material and preparation method thereof
  • All-steel truck radial tire formula rubber material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Add 7000mL of n-hexane and 1.0mL of 1.5-diazobicyclo[4,3,0]-5-nonene (DBN) into a 10-liter polymerization kettle under nitrogen protection, and then add it to the polymerization kettle under nitrogen pressure. 1060g of butadiene and 300g of isoprene, start stirring, then raise the temperature of the polymerization solution to 75°C, nitrogen protection pressure 0.35MPa, then add 0.72mol / L NBL 13.5mL, then dropwise add 9.5 One mmol of DVB dilute solution in hexane is added dropwise for 45 minutes. At this time, the temperature of the glue solution rises to the highest temperature of 95.6°C after 45 minutes of polymerization reaction, and the temperature rise rate is 0.46°C / min. Then continue to stir and react for 20 minutes, then add 13 mL of 0.7 mol / L N,N’-dimethylimidazolinone to the polymerization kettle, and react at a temperature not higher than 90°C for 15-20 minutes.

[0082] Then, the polymer glue was removed from the polymerization kettle, and 3.5g of antioxidant...

Embodiment 2

[0085] Keep the relevant process conditions in Example 1 unchanged, only 0.9mL of DBN is added, the mixed monomer used in the first stage is composed of 1100g of butadiene and 350g of isoprene, and the added butyllithium is 12mL 10.8mmol of divinylbenzene for continuous dropping, and the continuous dropping time is 50min; 12mL of N,N'-dimethylimidazolidinone for lithium termination of the second active chain.

[0086] The results are measured: the number average molecular weight Mn=16.78×10 of raw rubber 4 , the molecular weight distribution index is 2.74; the 1,2-addition unit content in the polybutadiene unit in the raw rubber is 8.43%, and the trans 1,4-addition unit content is 78.56%; the polyisoprene unit in the The 3,4-addition unit content is 6.42%, and the trans 1,4-addition unit content is 81.86%. The Mooney viscosity ML of the raw rubber is 58.5; the Tg is -84.6°C.

Embodiment 3

[0088] Keep the relevant process conditions in Example 2 unchanged, only 1.2mL of DBU is added, the mixed monomer used in the first stage is composed of 900g of butadiene and 500g of isoprene, and the added butyllithium is 10mL 11.8 mmol of divinylbenzene for continuous dropwise addition, and the continuous dropwise addition time is 48 minutes. 10mL of N,N'-dimethylimidazolidinone used for the lithium termination of the second active chain was reacted at 85-90°C for 20min, and then 0.7mol / L of tributyltin chloride was added to the polymerization kettle. After reacting 9mL of hexane solution at 80-85°C for 20min, it is ready.

[0089] The results are measured: the number average molecular weight Mn=19.24×10 of raw rubber 4 , molecular weight distribution index 2.86; 1,2-addition unit content in polybutadiene unit in raw rubber is 7.46%, trans 1,4-addition unit content is 78.94%; polyisoprene unit 3 , The content of 4-addition units is 6.23%, and the content of trans-1,4-addit...

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Abstract

The invention discloses an all-steel truck radial tire formula rubber material and a preparation method thereof, and a tread rubber material, a sidewall rubber material and a tire base rubber material of the all-steel truck radial tire formula rubber material all use butadiene-isoprene copolymer rubber (BIR) with wide distribution, high melt elasticity, high branching and high trans 1, 4-addition unit content and multi-block units in gradient distribution, natural rubber or / and styrene butadiene rubber and the like, The matched composite material has excellent processability, and the composite vulcanized rubber material has the characteristics of good compatibility, high strength, low heat generation, flexing resistance, cracking resistance, aging resistance, wet skid resistance and low rolling resistance.

Description

technical field [0001] The invention relates to a compound compound for all-steel radial truck tires, in particular to a polyisoprene block with chain lengths in an orderly gradient distribution, trans-1,4 structure, wide distribution, etc. The invention relates to an all-steel radial truck tire formula compound and a preparation method with polybutadiene-isoprene rubber and natural rubber as main components, belonging to the field of tire rubber. Background technique [0002] Tires are an important safety component of automobiles, and the tire industry is one of the important areas of national economic development. When truck tires or passenger car tires are driven on high-speed roads for a long time, they undergo periodic compression deformation and high-frequency bending and straightening movements, and When the tire rubs against the ground violently, the resulting resistance increases and a large amount of heat is generated. When the heat accumulates to a certain extent,...

Claims

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Application Information

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IPC IPC(8): C08L53/02C08L7/00C08L9/06C08K13/02C08K3/04C08K3/22C08K5/09C08K13/04C08K7/26B60C1/00
CPCC08L53/02C08L9/06C08L7/00B60C1/0016B60C1/0025C08L2201/08C08L2205/03C08K2003/2296C08K2201/006C08K2201/011C08K13/02C08K3/04C08K3/22C08K5/09C08K13/04C08K7/26Y02T10/86
Inventor 姚琼张建国蒋文英付为金
Owner CHINA PETROLEUM & CHEM CORP
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