Low-heat-generation integrated rubber, and synthesis method and application thereof
A technology that integrates rubber and synthetic methods, and is used in transportation and packaging, tire components, rolling resistance optimization, etc. to achieve low heat generation.
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[0021] According to the first aspect of the present invention, a method for synthesizing low heat generation integrated rubber is provided, the method comprising:
[0022] (1) In the presence of an inert solvent and an organic lithium initiator, the first copolymerization reaction of styrene monomer, butadiene monomer and isoprene monomer is carried out;
[0023] (2) adding two-stage butadiene monomer to the product obtained in step (1), the two-stage butadiene monomer completes feeding within 10-40min, and then carries out the second copolymerization reaction for 10-40min;
[0024] Wherein, the mass ratio of the first-stage butadiene monomer to the second-stage butadiene monomer is 30-300:100;
[0025] (3) Coupling and terminating the active polymerization product obtained in step (2), and adding an anti-aging agent to obtain an integrated rubber with low heat generation.
[0026] In the present invention, the butadiene monomer is controlled to be added in two stages, and th...
Embodiment 1
[0062] The mixed solvent (hexanaphthene and normal hexane, mass ratio is 88:12) with 5A molecular sieve ( Purchased from Dalian Kangyu Chemical Co., Ltd., pre-baked at 500°C for 5h) and soaked for 1 week.
[0063] Under the protection of high-purity nitrogen, 2500g of mixed solvent, 37g of styrene, 56g of isoprene, and 83g of butadiene were sequentially added to a 5-liter polymerization kettle, the temperature was raised to 45°C, and 20.0mL of n-butyllithium solution (normal The concentration of butyllithium is 0.1437mol / L), and the first copolymerization reaction is carried out: the temperature is 45°C, and the pressure is 0.2MPa; the first copolymerization reaction is carried out for 15min to reach the highest temperature of 69°C;
[0064] When the temperature of the first copolymerization reaction reached the highest temperature, 198g of second-stage butadiene was slowly fed into the polymerization tank, the feeding speed was controlled, and the addition was completed in 3...
Embodiment 2
[0068] The mixed solvent (hexanaphthene and normal hexane, mass ratio is 88:12) with 5A molecular sieve ( Purchased from Dalian Kangyu Chemical Co., Ltd., pre-baked at 500°C for 5 hours) and soaked for 1 week.
[0069] Under the protection of high-purity nitrogen, 2500g of mixed solvent, 56g of styrene, 75g of isoprene, and 81g of butadiene were sequentially added to a 5-liter polymerization kettle, the temperature was raised to 50°C, and 15.0mL of n-butyllithium solution (normal The concentration of butyllithium is 0.1437mol / L), and the first copolymerization reaction is carried out: the temperature is 50°C, and the pressure is 0.2MPa; the first copolymerization reaction is carried out for 10min to reach the highest temperature of 75°C;
[0070] When the temperature of the first copolymerization reaction reaches the highest temperature, 162g of second-stage butadiene is slowly fed into the polymerization tank, the feeding speed is controlled, and the addition is completed at...
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