Preparation method of macromolecular copolymer tread rubber
A polymer copolymer and copolymer technology, which is used in special tires, tire parts, transportation and packaging, etc., can solve the problems affecting wet grip, flexural crack strength of tire treads, etc., and achieve guaranteed strength, The effect of ensuring quality and prolonging wear life
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Embodiment 1
[0017] The preparation method product of polymer copolymer tread rubber is prepared by the following method:
[0018] (1) Preparation of Copolymer A: Under the condition of temperature 60°C, under the condition of nitrogen seal, 1,3-pentadiene and 2,4-pentadiene and α-methylstyrene are prepared, and the polymerization medium is n-pentadiene Under the condition of mixture of alkanes and dimethyl ether, through coupling agent R 2 GaCl 2 The coupling reaction takes 2 to 4 hours, and the addition of the coupling agent must be added twice. When the yield of the reaction product reaches 50 to 90%, the obtained molecular weight is 8×10 4 ~5×10 5 of copolymers.
[0019] (2) Preparation of Copolymer B: Under the condition of temperature 60°C, under the condition of nitrogen seal, 1,3-pentadiene and 2,4-pentadiene and α-methylstyrene are prepared, and the polymerization medium is n-pentadiene Under the condition of mixture of alkanes and dimethyl ether, through coupling agent R 2 G...
Embodiment 2
[0022] The preparation method product of polymer copolymer tread rubber is prepared by the following method:
[0023] (1) Preparation of Copolymer A: Under the condition of temperature 80°C, under the condition of nitrogen seal, 1,3-pentadiene and α-methylstyrene are prepared in the mixture of n-pentane and dimethyl ether in the polymerization medium Under the conditions, the coupling agent R 2 GaCl 2 The coupling reaction takes 2 to 4 hours, and the addition of the coupling agent must be added twice. When the yield of the reaction product reaches 60 to 90%, the obtained molecular weight is 9×10 4 ~4×10 5 of copolymers.
[0024] (2) Preparation of copolymer B: under the condition of temperature 80°C, under the condition of nitrogen seal, 2,4-pentadiene and α-methylstyrene are prepared under the condition that the polymerization medium is a mixture of n-hexane and diethyl ether , via coupling agent R 2 GaCl 2 The coupling reaction is 4h, and the addition of the coupling a...
Embodiment 3
[0027] The preparation method product of polymer copolymer tread rubber is prepared by the following method:
[0028] (1) Preparation of Copolymer A: Under the condition of temperature 100°C, under the condition of nitrogen seal, 1,3-pentadiene and α-methylstyrene are prepared in the mixture of n-pentane and dimethyl ether in the polymerization medium Under the conditions, the coupling agent R 2 GaCl 2 The coupling reaction takes 2 to 4 hours, and the addition of the coupling agent must be added twice. When the yield of the reaction product reaches 60 to 90%, the obtained molecular weight is 9×10 4 ~5×10 5 of copolymers.
[0029] (2) Preparation of copolymer B: under the condition of temperature 80°C, under the condition of nitrogen seal, from 1,3-pentadiene α-methylstyrene, the polymerization medium is the mixture of n-pentane and dimethyl ether Under the coupling agent R 2 GaCl 2 The coupling reaction is 4h, and the addition of the coupling agent must be added twice. W...
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