Wear-resistant and high-temperature-resistant tread rubber
A technology of high temperature resistance and tread, applied in the field of rubber preparation, can solve the problems of affecting wet grip, flexural cracking strength of the tire tread, and other problems, so as to achieve the effect of ensuring strength, ensuring quality and prolonging wear life.
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Embodiment 1
[0020] Wear-resistant and high-temperature resistant tread rubber products are prepared by the following methods:
[0021] (1) Preparation of copolymer A: at a temperature of 60 ℃, using nitrogen sealing conditions, from 1,3-pentadiene and 2,4-pentadiene and α-methyl styrene, the polymerization medium is n-pentadiene Under the condition of the mixed liquid of alkane and dimethyl ether, the coupling agent R 2 GaCl 2 The coupling reaction is 2~4h, the coupling agent must be added twice, when the reaction product yield reaches 50~90%, the molecular weight is 8×10 4 ~5×10 5 的copolymer.
[0022] (2) Preparation of copolymer B: at a temperature of 60 ℃, using nitrogen sealing conditions, from 1,3-pentadiene and 2,4-pentadiene and α-methyl styrene, the polymerization medium is n-pentadiene Under the condition of the mixed liquid of alkane and dimethyl ether, the coupling agent R 2 GaCl 2 Coupling reaction 4h, the coupling agent must be added twice, when the reaction product yield reaches ...
Embodiment 2
[0025] Wear-resistant and high-temperature resistant tread rubber products are prepared by the following methods:
[0026] (1) Preparation of copolymer A: at a temperature of 80 ℃, the use of nitrogen sealing conditions, from 1,3-pentadiene and α-methyl styrene, the polymerization medium is a mixture of n-pentane and dimethyl ether Under the conditions, the coupling agent R 2 GaCl 2 The coupling reaction is 2~4h, the coupling agent must be added twice. When the reaction product yield reaches 60~90%, the molecular weight is 9×10 4 ~4×10 5 的copolymer.
[0027] (2) Preparation of copolymer B: at a temperature of 80°C, using nitrogen sealing conditions, from 2,4-pentadiene and α-methylstyrene, under the condition that the polymerization medium is a mixture of n-hexane and diethyl ether , By coupling agent R 2 GaCl 2 The coupling reaction is 4h, the coupling agent must be added twice, when the reaction product yield reaches 50-90%, the molecular weight is 5×10 5 ~1×10 6 的copolymer.
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Embodiment 3
[0030] Wear-resistant and high-temperature resistant tread rubber products are prepared by the following methods:
[0031] (1) Preparation of copolymer A: at a temperature of 100 ℃, using nitrogen sealing conditions, from 1,3-pentadiene and α-methyl styrene, the polymerization medium is a mixture of n-pentane and dimethyl ether Under the conditions, the coupling agent R 2 GaCl 2 The coupling reaction is 2~4h, the coupling agent must be added twice. When the reaction product yield reaches 60~90%, the molecular weight is 9×10 4 ~5×10 5 的copolymer.
[0032] (2) Preparation of copolymer B: at a temperature of 80℃, using nitrogen sealing conditions, from 1,3-pentadiene α-methylstyrene, under the condition that the polymerization medium is a mixture of n-pentane and dimethyl ether Next, by coupling agent R 2 GaCl 2 The coupling reaction is 4h, and the coupling agent must be added twice. When the reaction product yield reaches 60-90%, the molecular weight is 5×10 5 ~1×10 6 的copolymer.
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