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Solution polymerized styrene-butadiene rubber as well as preparation method and application thereof

A solution-polymerized styrene-butadiene rubber, polymerization reaction technology, applied in transportation and packaging, tire parts, special tires, etc., can solve problems such as limited solution-polymerized styrene-butadiene rubber, and achieve low cost, simple preparation system, and good mechanical properties. Effect

Pending Publication Date: 2022-04-12
PETROCHINA CO LTD
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  • Description
  • Claims
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Problems solved by technology

[0007] Although there have been some studies and reports on the solution-polymerized styrene-butadiene rubber with a three-peak molecular weight distribution, it is still limited to the preparation of a solution-polymerized styrene-butadiene rubber that needs to be compounded with a variety of coupling agents to achieve a three-peak molecular weight distribution.

Method used

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  • Solution polymerized styrene-butadiene rubber as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0036] Adopt 10kg / h continuous polymerization test device (polymerization kettle) to synthesize solution-polymerized styrene-butadiene rubber, and the preparation process is specifically as follows:

[0037] Add carbon five solvent oil in polymerization kettle, start to stir, then add 3g ethyl tetrahydrofurfurfuryl ether and 7kg monomer (styrene and butadiene total amount is 7kg, wherein, styrene content 10%, butadiene content 90%), when the temperature in the kettle reaches 35° C. (initiation temperature), add 44 g of n-butyl lithium in cyclopentane solution (the molar concentration of n-butyl lithium is about 0.7-0.8 mol / L) to initiate polymerization; About 30 minutes after the polymerization reaction reaches the peak temperature, add 20g SiCl 4 Start the coupling reaction, after another 20min, add 4g SiCl 4 (calculated as lithium element, coupling agent SiCl 4 The molar ratio of the total amount to n-butyllithium is about 0.125:1), continue the coupling reaction for 20 mi...

Embodiment 2

[0040] Adopting 15L batch polymerization test device (polymerization kettle) to synthesize solution-polymerized styrene-butadiene rubber, the preparation process is as follows:

[0041] Add C5 solvent oil in the polymerization kettle, start stirring, then add 0.15g ethyl tetrahydrofurfuryl ether and 320g monomer (styrene and butadiene total amount is 320g, wherein, styrene content 10%, butadiene content of 90%), when the temperature in the kettle reaches 40°C, add 2g of n-butyllithium cyclopentane solution (the molar concentration of n-butyllithium is about 1.6mol / L) to initiate the polymerization reaction; the polymerization reaction reaches the peak temperature After about 30min, add 0.9g SiCl 4 Start the coupling reaction, after another 15min, add 0.2g SiCl 4 (calculated as lithium element, coupling agent SiCl 4 The molar ratio of the total amount to n-butyllithium is about 0.15:1), continue the coupling reaction for 15 minutes (that is, the interval between two coupling ...

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Abstract

The invention provides solution polymerized styrene-butadiene rubber and a preparation method and application thereof, the preparation method comprises the following steps: in the presence of an organic lithium initiator and a structure regulator, styrene and butadiene are subjected to a polymerization reaction, then a coupling agent is added into the polymerization reaction system for a coupling reaction, and the solution polymerized styrene-butadiene rubber is obtained, wherein the adding time of the coupling agent is as follows: a part of the coupling agent is added within 30 minutes after the polymerization reaction reaches the peak temperature, and the rest of the coupling agent is added within 10-30 minutes after the part of the coupling agent is added. The method can be used for efficiently preparing the solution polymerized styrene-butadiene rubber product with three-peak molecular weight distribution.

Description

technical field [0001] The invention relates to a technology for controlling the molecular weight distribution of synthetic styrene-butadiene rubber, in particular to a solution-polymerized styrene-butadiene rubber with a three-peak molecular weight distribution and its preparation method and application. Background technique [0002] Styrene-butadiene rubber (SBR), also known as polystyrene butadiene copolymer, its physical and mechanical properties, processing properties and product performance are close to natural rubber, its wear resistance, heat resistance, aging resistance and vulcanization speed are faster than natural rubber It is more excellent and can be used together with natural rubber and various synthetic rubbers. It is widely used in the fields of tires, tapes, hoses, wires and cables, medical appliances and various rubber products. It is the largest general-purpose synthetic rubber variety and the earliest to realize One of the rubber varieties produced indus...

Claims

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Application Information

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IPC IPC(8): C08F236/10C08F212/08C08C19/25B60C1/00
CPCY02T10/86
Inventor 费宇晶默云娟杨钢杨广明赵泽鹏李洪波闫蓉陈晓博周俊杰郭庆尚志强薛文慧
Owner PETROCHINA CO LTD
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