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Production method of solution polymerized styrene-butadiene rubber with low initiator residue and product

A technology of solution-polymerized styrene-butadiene rubber and a production method, which is applied in the production of bulk chemicals, optimization of rolling resistance, emission reduction of road transportation, etc., can solve the problem of removing the initiator without considering the carbon dioxide inflow treatment device and without considering the termination efficiency. Efficiency and other issues, to achieve the effect of improving termination efficiency and initiator removal rate, improving stability and chromaticity, and prolonging yellowing time

Active Publication Date: 2022-08-09
宁波新溶聚企业管理合伙企业(有限合伙)
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although the above-mentioned patent gives the inspiration of using carbon dioxide as a terminator, it does not give the specific amount of carbon dioxide introduced and the corresponding treatment equipment and other links, nor does it consider issues such as termination efficiency and initiator removal efficiency.

Method used

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  • Production method of solution polymerized styrene-butadiene rubber with low initiator residue and product
  • Production method of solution polymerized styrene-butadiene rubber with low initiator residue and product
  • Production method of solution polymerized styrene-butadiene rubber with low initiator residue and product

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Experimental program
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Effect test

Embodiment 1-4

[0050] Under nitrogen protection, 21,000kg of n-hexane, 830kg of styrene and 2,270kg of 1,3-butadiene were added to the reactor, and heated to a specified temperature of 50 °C, followed by adding 30.5 mol of n-butyllithium initiator, and then at 70 °C. The reaction was carried out at ℃ for 15 min, then at a temperature of 90 ℃ for 15 min, and finally at 115 ℃ for 20 min, and the obtained monomer conversion rate was 100%.

[0051] Embodiment 1-4 adopts desalted water, carbon dioxide to react with Li + to form mixtures in different ratios, where desalinated water, carbon dioxide and Li + The molar ratio of SSBR is greater than or equal to 1:1:2 (the specific dosage is shown in Table 1), to terminate the reaction and precipitate the initiator, fully react in the glue mixing tank and mix evenly to obtain the glue mixture of SSBR rubber , and then agglomerated to obtain SSBR rubber products, and the structure and properties were measured. The results are shown in Table 1.

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Abstract

The invention relates to a production method of solution polymerized styrene-butadiene rubber with low initiator residue and a product. The method comprises a polymerization reaction step, a terminal termination step and a sufficient precipitation step, after the raw materials are fully polymerized, a glue solution is introduced into a reaction pipeline, a mixture of desalted water and carbon dioxide mixed by a dynamic and static combination mixing device is introduced into the reaction pipeline, Li2CO3 precipitate is generated to terminate the polymerization reaction, and then Li < + > is fully precipitated in a glue solution mixer. A proper amount of carbon dioxide and desalted water are adopted, a polymerization reaction is effectively terminated and initiator residues are fully removed through an efficient dynamic and static combination mixing device, so that the gel content of a rubber product is 10 ppm or below, the Mooney rise value is 3 or below, the yellowing days are 7 or above, and the Siebo characteristic degree reaches 30 or above; and the method is low in cost, environment-friendly and efficient, is suitable for large-scale production of solution polymerized styrene-butadiene rubber, and can also be popularized to production processes of SBS, LCBR and other rubbers adopting an anionic polymerization mechanism.

Description

technical field [0001] The invention belongs to the technical field of solution-polymerized styrene-butadiene rubber synthesis, and relates to a method for removing initiator residues in the synthesis of solution-polymerized styrene-butadiene rubber. Background technique [0002] SBR has the advantages of wear resistance, cold resistance, low heat generation, high resilience, low shrinkage, good color, low ash content, high purity and fast vulcanization speed. Compared with other rubbers, emulsion polystyrene-butadiene rubber has good wet skid resistance, but large rolling resistance, natural rubber and polybutadiene rubber have low rolling resistance, but poor wet skid resistance. The solution-polymerized styrene-butadiene rubber has the comprehensive properties of good wet skid resistance and low rolling resistance, which just conforms to the development trend of green and high-performance tires. , one of the new synthetic rubber varieties developed and produced, with bro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/10C08F2/42C08F4/48
CPCC08F236/10C08F212/08C08F2/42C08F4/48Y02T10/86
Inventor 张振华
Owner 宁波新溶聚企业管理合伙企业(有限合伙)
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